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Sample records for audio media

  1. PENGGUNAAN MEDIA AUDIO DALAM PEMBELAJARAN STENOGRAFI

    Directory of Open Access Journals (Sweden)

    S Martono

    2011-06-01

    Full Text Available The objective this study is to know the effectivenes of using audio media in stenografi typing learning. The population  of this research was 30 students that divided into two groups; experimental and controlled group consisted of 15 students. Based on the first score in stenografi subject that the two groups have the same abillity but they were given different treatment. For experimental group, they got a treatment of audio media whereas the controlled group didn’t use audio media. The technique of collecting data were documentation technique and experimental tecnique. The instrument was stenografi speed typing. The final result showed that the using of audio media was more effective and can improve the study result better than controlled group. This result was expected to  give significance for the stenografi teachers to apply audio media in learning and input for the students that stenografi was not a memorizing subject but it was a skill subject that must be trained by joining the lesson. Thus, people can use stenografi typing to record each talk. Keywords: Learning, Audio Media, Stenografi

  2. PENGGUNAAN MEDIA AUDIO DALAM PEMBELAJARAN STENOGRAFI

    Directory of Open Access Journals (Sweden)

    S Martono

    2007-06-01

    Full Text Available The objective this study is to know the effectivenes of using audio media in stenografi typing learning. The population  of this research was 30 students that divided into two groups; experimental and controlled group consisted of 15 students. Based on the first score in stenografi subject that the two groups have the same abillity but they were given different treatment. For experimental group, they got a treatment of audio media whereas the controlled group didn’t use audio media. The technique of collecting data were documentation technique and experimental tecnique. The instrument was stenografi speed typing. The final result showed that the using of audio media was more effective and can improve the study result better than controlled group. This result was expected to  give significance for the stenografi teachers to apply audio media in learning and input for the students that stenografi was not a memorizing subject but it was a skill subject that must be trained by joining the lesson. Thus, people can use stenografi typing to record each talk. Keywords: Learning, Audio Media, Stenografi

  3. Children's Use of Audio Media.

    Science.gov (United States)

    Christenson, Peter G.; And Others

    1985-01-01

    Summarizes current research on children's use of audio equipment and argues that records, radio, and tapes play an important role in the personal and social lives of many children. Examines issues and promising approaches in the study of listening in children's lives. (PD)

  4. Data Hiding Through Media Audio

    OpenAIRE

    Sumi Khairani

    2017-01-01

    Audio watermarking can use with various ways. Firstly, it have used for proving of ownership, production of information, copyright information in a form of a watermark, and it have routed directly in the recording. Specific owners have different insertion information. It can also be used for controlling access, watermark becomes a trigger to play music. Keeping track of unauthorized copies is a very important application. Personal information have inserted into the music. It used as numbers f...

  5. 37 CFR 201.28 - Statements of Account for digital audio recording devices or media.

    Science.gov (United States)

    2010-07-01

    ... digital audio recording devices or media. 201.28 Section 201.28 Patents, Trademarks, and Copyrights... of Account for digital audio recording devices or media. (a) General. This section prescribes rules... United States any digital audio recording device or digital audio recording medium. (b) Definitions. For...

  6. 37 CFR 201.27 - Initial notice of distribution of digital audio recording devices or media.

    Science.gov (United States)

    2010-07-01

    ... distribution of digital audio recording devices or media. 201.27 Section 201.27 Patents, Trademarks, and... Initial notice of distribution of digital audio recording devices or media. (a) General. This section..., any digital audio recording device or digital audio recording medium in the United States. (b...

  7. Market potential for interactive audio-visual media

    NARCIS (Netherlands)

    Leurdijk, A.; Limonard, S.

    2005-01-01

    NM2 (New Media for a New Millennium) develops tools for interactive, personalised and non-linear audio-visual content that will be tested in seven pilot productions. This paper looks at the market potential for these productions from a technological, a business and a users' perspective. It shows

  8. The Role of Audio Media in the Lives of Children.

    Science.gov (United States)

    Christenson, Peter G.; Lindlof, Thomas R.

    Mass communication researchers have largely ignored the role of audio media and popular music in the lives of children, yet the available evidence shows that children do listen. Extant studies yield a consistent developmental portrait of childrens' listening frequency, but there is a notable lack of programatic research over the past decade, one…

  9. Audio Visual Media Components in Educational Game for Elementary Students

    Directory of Open Access Journals (Sweden)

    Meilani Hartono

    2016-12-01

    Full Text Available The purpose of this research was to review and implement interactive audio visual media used in an educational game to improve elementary students’ interest in learning mathematics. The game was developed for desktop platform. The art of the game was set as 2D cartoon art with animation and audio in order to make students more interest. There were four mini games developed based on the researches on mathematics study. Development method used was Multimedia Development Life Cycle (MDLC that consists of requirement, design, development, testing, and implementation phase. Data collection methods used are questionnaire, literature study, and interview. The conclusion is elementary students interest with educational game that has fun and active (moving objects, with fast tempo of music, and carefree color like blue. This educational game is hoped to be an alternative teaching tool combined with conventional teaching method.

  10. Penyisipan Teks Dengan Metode Low Bit Coding Pada Media Audio Menggunakan MATLAB 7.7.0

    OpenAIRE

    Wijaya, Hartana; - Universitas Budi Luhur, Karti Wilianti

    2013-01-01

    —Steganografi adalah teknik menyamarkan atau menyembunyikan pesan ke dalam sebuah media pembawa (carrier). Kelebihan steganografi terletak pada sifatnya yang tidak menarik perhatian atau kecurigaan orang lain. Salah satu media yang dapat digunakan sebagai carrier adalah berkas audio. Teknik steganografi pada berkas audio memanfaatkan kelemahan pendengaran manusia, karena kualitas suara antara berkas audio asli dengan berkas audio yang telah disisipkan pesan rahasia tidak jauh berbeda. Salah s...

  11. Audio vs. chat: The effects of group size on media choice

    OpenAIRE

    Löber, Andreas; Schwabe, Gerhard; Grimm, Sibylle

    2007-01-01

    The increasing usage of audio and chat communication in private and commercial cooperative settings requires new insight into choosing the appropriate media for collaborative tasks. The paper presents the results of two series of experiments comparing audio and chat communication with varying group sizes. The experimental data indicates that chat scales up better to an increase in group size than audio. We propose that the media richness theory appropriately predicts the productivity of small...

  12. Biochemistry on the Media: daily science in audio and video

    OpenAIRE

    B. P. Melo et al

    2014-01-01

    Biochemistry on the Media: daily science in audio and video Melo,B. P1; Henriques, L. R1; Júnior, H. G2; Galvão, G. R2; Costa, M. M2; Silva, A. S3; Costa, M. P3; Barreto, L. P3; Almeida, A. A3; Fontes, P. P3; Meireles, L. M3; Costa, P. A3; Costa, C. B3; Monteiro, L. M. O3 Konig, I. M3; Dias, B. K. M1; Santos, R. C. V1; Bagno, F. F1; Fernandes, L1; Alves, P. R1; Sales, F. M1; Martins, T. C. N1; Moreira, V. J. V1; Marchiori, J. M1; Medeiros, L.4; Leite, J. P. V5; Moraes, G. H. K6.   1 Members o...

  13. Biochemistry on the Media: daily science in audio and video

    Directory of Open Access Journals (Sweden)

    B. P. Melo et al

    2014-08-01

    Full Text Available Biochemistry on the Media: daily science in audio and video Melo,B. P1; Henriques, L. R1; Júnior, H. G2; Galvão, G. R2; Costa, M. M2; Silva, A. S3; Costa, M. P3; Barreto, L. P3; Almeida, A. A3; Fontes, P. P3; Meireles, L. M3; Costa, P. A3; Costa, C. B3; Monteiro, L. M. O3 Konig, I. M3; Dias, B. K. M1; Santos, R. C. V1; Bagno, F. F1; Fernandes, L1; Alves, P. R1; Sales, F. M1; Martins, T. C. N1; Moreira, V. J. V1; Marchiori, J. M1; Medeiros, L.4; Leite, J. P. V5; Moraes, G. H. K6.   1 Members of ETP-Biochemistry UFV; 2 Students of program Jovens Talentos para a Ciência UFV; 3 Graduating Students of ETP; 4 Coordinator in Espaço Ciência UFV; 5 Pharmaceutical, professor at Molecular Biology and Biochemistry Department (BBD UFV, ETP’s tutor; 6 Agronomist, professor at BDD, work’s advisor.   INTRODUCTION: The Educational Tutorial Program in Biochemistry (ETP from UFV have worked in qualification of basic science teachers, offering courses about Biochemistry. In courses, was detected the necessity of a personal material to inspire them. To do it, ETP compiled some media spots in a box and have used it in qualification courses. OBJECTIVES: The objective of this work was construct a part of a permanent material to be used in courses to qualifications high school's teachers and evaluate it. METODOLOGY: Applying questionnaires to high school students, ETP's members had detected that these students don't have a solid idea about how is Biochemistry. Thus, themes about common Biochemistry daily things were elected to be transformed in spots to radio and television. Texts about shampoo composition, vegetable’s darkening, bread’s fermentation, etc, were written and a script done by Journalism’s students of Espaço Ciência(*. Finally, the spots were recorded and vehiculated on universitary channel. In 2013, the spots were compiled in a media box. It has been included in a permanent material used in qualification courses. According to ALBAGLI

  14. PENGEMBANGAN MEDIA AJAR PERAWATAN DAN PERBAIKAN SISTEM AUDIO PADA MATAKULIAH WORKSHOP AUDIO VIDEO UNTUK MAHASISWA PROGRAM STUDI PENDIDIKAN TEKNIK ELEKTRO UNIVERSITAS NEGERI MALANG

    Directory of Open Access Journals (Sweden)

    Suwasono Suwasono

    2017-01-01

    Full Text Available This research addresses jobsheet and trainer learning media development for maintenance and repairment of Audio System in Audio Video Workshop Course (PTEL65 for Electrical Engineering Education student Universitas Negeri Malang. This development research was refered to Development Model suggested by Sugiyono. The result of this research were jobsheet and trainer for maintenance and repairment of Audio System supplemented with test point to measure and determine input and output of signal forms in each audio systme diagram block. The product then were set on trial within Electrical Engineering Education students Universitas Negeri Malang who have enrolled Audio Video Workshop Course year 2012/2013 and 2013/2014. The result of product trial accomplished 88.30% and categorized as appropriate. Validity examination was also cinducted. The results were 92.80% from material expertise, 91.60% from media expertise. Hence, jobsheet and trainer learning media development for maintenance and repairment of Audio System in Audio Video Workshop Course (PTEL65 is appropriate to be used in Electrical Engineering Education Department Universitas Negeri Malang= Penelitian ini bertujuan untuk mengembangkan media ajar berupa jobsheet dan trainer perawatan dan perbaikan Sistem Audio pada matakuliah Workshop Audio Video (PTEL665 untuk mahasiswa program studi Pendidikan Teknik Elektro Universitas Negeri Malang. Penelitian pengembangan ini mengacu model pengembangan Sugiyono. Hasil pengembangan media ajar berupa jobsheet dan trainer perawatan dan perbaikan Sistem Audio, yang dilengkapi dengan test point untuk mengukur dan mengetahui bentuk sinyal input dan output pada masing-masing blok diagram Sistem Audio dan saklar kesalahan untuk mengetahui kesalahan, dan menentukan langkah perbaikan Sistem Audio. Produk diujicobakan pada mahasiswa Pendidikan Teknik Elektro yang sudah menempuh matakuliah Workshop Audio Video angkatan 2012/2013 dan 2013/2014. Hasil uji coba pada

  15. Pengaruh layanan informasi bimbingan konseling berbantuan media audio visual terhadap empati siswa

    Directory of Open Access Journals (Sweden)

    Rita Kumalasari

    2017-05-01

    The results of research effective of audio-visual media counseling techniques effective and practical to increase the empathy of students are rational design, key concepts, understanding, purpose, content models, the role and qualifications tutor (counselor is expected, procedures or steps in the implementation of the audio-visual, evaluation, follow-up, support system. This research is proven effective in improving student behavior. Empathy behavior of students increases 28.9% from the previous 45.08% increase to 73.98%. This increase occurred in all aspects of empathy Keywords: Effective, Audio visual, Empathy

  16. Peningkatan Keterampilan Membaca Puisi Melalui Media Audio Visual Siswa Kelas V Sdn Rowosari 02 Semarang

    OpenAIRE

    Ainun Alifah, Djariyo

    2013-01-01

    This research is motivated by the skills of reading poetry is very low, students can not read poetry properly, the students have not dared to read poetry in front of the class with its own style and expression. issues that will be studied in the research of this class action is whether the audio-visual media can improve the skills of reading poetry Grade V SDN Rowosari 02 academic year 2011/2012. The hypothesis of this study is if the action using optimal audio-visual media in the learning pr...

  17. A Comparison of Students' Performances Using Audio Only and Video Media Methods

    Science.gov (United States)

    Sulaiman, Norazean; Muhammad, Ahmad Mazli; Ganapathy, Nurul Nadiah Dewi Faizul; Khairuddin, Zulaikha; Othman, Salwa

    2017-01-01

    Listening is a very crucial skill to be learnt in second language classroom because it is essential for the development of spoken language proficiency (Hamouda, 2013). The aim of this study is to investigate the significant differences in terms of students' performance when using traditional (audio-only) method and video media method. The data of…

  18. Knowledge-assisted cross-media analysis of audio-visual content in the news domain

    NARCIS (Netherlands)

    Mezaris, Vasileios; Gidaros, Spyros; Papadopoulos, Georgios Th.; Kasper, Walter; Ordelman, Roeland J.F.; de Jong, Franciska M.G.; Kompatsiaris, Ioannis

    In this paper, a complete architecture for knowledge-assisted cross-media analysis of News-related multimedia content is presented, along with its constituent components. The proposed analysis architecture employs state-of-the-art methods for the analysis of each individual modality (visual, audio,

  19. METODE TALKING STICK DENGAN MEDIA AUDIO UNTUK MENINGKATKAN MOTIVASI BELAJAR SISWA PADA MATA PELAJARAN STENOGRAFI

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    Wahyuni Sri Utami

    2015-03-01

    Full Text Available Stenography learning in class X Office Administration 3 at SMK Negeri 1Pemalang indicated the low learning motivation. The purpose of this research was toknow the students’ learning motivation improvement after using talking stick methodwith audio media at Stenography subject in class X Office Administration at SMK N 1Pemalang. It was a classroom action research conducted in three cycles which eachcycle was consisted of planning, implementation, observation, and reflection. The datawere collected by observation and test. Then, the data were analyzed by percentagedescriptive. The results showed that talking stick method with audio media can improvestudents' motivation at Stenography subject in class X Office Administration 3 at SMKN 1 Pemalang. The average of students’ motivation on the first cycle was 63.08%, thenincreased up to 72.08% on the second cycle and finally, it went up to 85.08% on thethird cycle.

  20. PERANCANGAN MEDIA PEMBELAJARAN BERBASIS AUDIO VISUAL UNTUK MATA KULIAH TIPOGRAFI PADA PROGRAM STUDI DESAIN KOMUNIKASI VISUAL UNIVERSITAS DIAN NUSWANTORO

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    Puri Sulistiyawati

    2017-02-01

    Full Text Available Abstrak Tipografi merupakan salah satu mata kuliah pada bidang desain komunikasi visual yang mengutamakan aspek visual. Namun berdasarkan hasil observasi diketahui bahwa media pembelajaran yang selama ini digunakan kurang efektif karena kurangnya pemanfaatan teknologi informasi, sehingga mahasiswa kurang maksimal dalam memahami materi kuliah yang disampaikan oleh pengajar. Perkembangan teknologi informasi saat ini banyak memberikan dampak positif bagi kemajuan bidang pendidikan diantaranya dapat digunakan untuk mendukung media dalam proses pembelajaran. Tujuan penelitian ini adalah merancang media pembelajaran untuk mata kuliah tipografi dengan memanfaatkan teknologi informasi yaitu media audio visual. Metode yang digunakan dalam penelitian ini adalah Research and Development dengan pendekatan model ADDIE (Analysis, Design, Development, Implementation, Evaluation. Dengan diciptakannya media pembelajaran audio visual ini diharapkan proses pembelajaran mata kuliah Tipografi dapat lebih efektif dan materi kuliah lebih mudah dipahami oleh mahasiswa. Kata Kunci : audio visual, media pembelajaran, tipografi Abstract Typography is one of the subjects in the field of visual communication design that prioritizes the visual aspect. However, based on the observation note that the media has been used less effective because the lack of use information technology, so students can't understand the course material that explained by lecturers. Today, the development of information technology is being positive impact for the advancement of education which can be used to support the media in the learning process. The purpose of this research is to design learning media for the course of typography by utilizing information technology, called audio-visual media.  The method that used in this research is Research and Development with ADDIE model (Analysis, Design, Development, Implementation, Evaluation. With the creation of audio-visual learning media is expected

  1. PENGEMBANGAN MEDIA PEMBELAJARAN AUDIO CERITA PENDEK YANG BERMUATAN NILAI-NILAI PENDIDIKAN KARAKTER UNTUK MENINGKATKAN KETERAMPILAN MENYIMAK BAGI PESERTA DIDIK PENDIDIKAN MENENGAH

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    Lutfah Barliana

    2015-08-01

    Full Text Available Masalah yang diteliti dalam penelitian ini adalah (1 kecenderungan kebutuhan pengembangan media pembelajaran audio cerpen yang bermuatan nilai-nilai pendidikan karakter menurut persepsi guru dan peserta didik, (2 karakteristik pengembangan media pembelajaran audio cerpen yang bermuatan nilai-nilai pendidikan karakter, (3 wujud media pembelajaran audio cerpen yang bermuatan nilai-nilai pendidikan karakter dan buku panduan yang dikembangkan, (4 keefektifan pengembangan media pembelajaran audio cerpen yang bermuatan nilai-nilai pendidikan karakter. Penelitian ini merupakan penelitian pengembangan. Analisis hasil penelitian menggunakan deskriptif kuantitatif dan deskriptif kualitatif. Penelitian ini dilakukan pada peserta didik SMK/ SMA Kabupaten Tegal. Di dalam penelitian pengembangan ini digunakan pendekatan Research and Development (R&D dari Borg and Gall (1983:775-776 yang telah diadaptasi oleh Sukmadinata (2011:169-170. Hasil penelitian ini adalah (1 deskripsi hasil analisis kecenderungan kebutuhan pengembangan media pembelajaran audio cerpen menurut persepsi guru dan peserta didik. (2 rumusan karakteristik pengembangan media pembelajaran audio cerpen, (3 wujud pengembangan media pembelajaran audio cerpen berupa DVD yang berisi 5 buah rekaman cerpen, rekaman soal uraian dan pilihan ganda. Nilai pendidikan  karakter yang diintegrasikan ke dalam cerpen-cerpen tersebut ada 13. Keempat penguji memberikan penilaian sangat baik terhadap media audio menyimak cerpen dan buku panduan. (4 hasil uji keefektifan mengalami peningkatan sebesar 0,656. Peningkatan tersebut termasuk kategori sedang. This study is an attempt to find out the application audio media is needed by the teacher and the student, types of characteristic developing audio media in teaching listening, designed of textbook are developed in listening by using audio media, extend does the audio media of listening influence the teaching learning process. The subject of the study are the

  2. Pendidikan Kesehatan Media Audio Visual Lebih Efektif untuk Meningkatkan Pengetahuan Siswa tentang Kesehatan Reproduksi

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    Esa Rara Regina

    2013-04-01

    Full Text Available Background: Statistical data of 2008 in Indonesia showed from 43,3 million adolescents aged 15-24 years of unhealthy behavior, teenage Indonesia from 23 million aged 15-24 years, 83,3% had had sexual intercourse. Negative behavior patterns and risk of adolescent reproductive health will have an impact on their future, so it requires a special education discuss reproductive health. Audiovisual media and the leaflet is a medium that can be used in the delivery of reproductive health education information. Preliminary study of the 5 people from 216 students in grade VII showed that students did not know about health reproductive. Objectives: This study aims to determine the ratio of health ducation via media audio visual and leaflets to students' knowledge about health reproductive adolescent in SMP Negeri 2 Ampel Boyolali. Methods: The method in this study was quasi-experimental (quasi experiment and the use of design Non Equivalent Pre-Post Design. Samples were taken by technique proportional random sampling is a class VII student at SMPl 2 Ampel Boyolali much as 140 people. The instruments of the study questionnaire and test results were analyzed with Wilcoxon Signed Ranks Test and the Kolmogorov- Smirnow. Results: Knowledge of students' prior education health was reproductive adolescent in the SMP Negeri 2 Ampel Boyolali largely lacking as many as 71 students (50,7%. Knowledge students' after the adolescent reproductive health education in SMP 2 Ampel Boyolali well as most of the 72 students (51,4%. The results test Wilcoxon Signed Ranks Test via the media leaflet obtained p-value 0,000 <0,05 there are 55 students to increase knowledge. While the media audio visual obtained through p-value0,000 < 0,05 there are 39 students have increased knowledge. The results test Kolomogorov Smirnov obtained p-value 0,020 < 0,05. Conclusion: There is a difference in education health via media audio visual and leaflets to knowledge students about health

  3. Efektivitas Layanan Informasi dengan Menggunakan Media Audio Visual dalam Meningkatkan Sikap Siswa terhadap Kedisiplinan Sekolah

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    Nory Natalia

    2015-10-01

    Full Text Available The research based on phenomenon where students has low attitude in school discipline, such as many students who break the rules in their the absence, the uniform and learning activity, where it can be effect on learning quality and quantity. Guidance and counseling is to improve student’s attitude on school discipline, one of them is information services. The research purpose to test effectiveness of information services with using the audio visual media to improve students attitude on school discipline. This research use quantitative method. Type of this research is Quasi Experiment with Non Equivalent Control Group Design. The population are students at SMP Muhammadiyah Padang Panjang and sample selected with using purposive sampling. The instrument is questionnaire with Likert Scale and tested for validity and reliability. The validity test used Product Moment Correlation with mean correlation coefficient 0.642 and the reliability test used Cronbach's Alpha with r 0.965. Then analysis technique using Wilcoxon Signed Ranks Test and Kolmogorov Smirnov 2 Samples Independent using SPSS 20. The results showed that information service with using the audio visual media effective to improve students attitude on school discipline.

  4. The Improvement of Students’ Leadership Ethic in Studying History by Using Baratayuda Audio Visual Media

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    Wendhy Rachmadhany

    2018-04-01

    Full Text Available The purpose of this research is to know the improvement of students’ leadership ethic in studying History after the implementation of Baratayuda Audio Visual Media. The population of this research is XI-Social Science-1 Class of SMAN 1 Pare, Kediri Regency, in academic year 2016/2017, consisted of 39 students. This Classroom Action Research (CAR is arranged by Pre-test, Cycle-1 and Cycle-2 which consisted by some steps, such like; planning, implementation, observation, and reflection. Collecting the data is by using questionnaire of leadership ethic, interview, and documentation. The method of data analysis in this research is descriptive analysis by comparing the improvement from one cycle to another. The result of the research is showing that: There is an improvement of leadership ethic in studying History after the implementation of Baratayuda Audio Visual media. It is shown by the results as follows; Pre-test indicates that the passing score is about 17, 95%. On Cycle-1 indicates 46, 1% and on Cycle-2 indicates a significant improvement about 71, 83%.

  5. ‘Chronovist’ conceptualisation method: exploring new approaches to structuring narrative in interactive immersive audio/visual media.

    OpenAIRE

    Tchernakova, A. E.

    2015-01-01

    This research investigates whether the application of the initially literary concepts of Bakhtin’s ‘chronotope’ and ‘utterance’ to the field of interactive narrative audio-visual media can lead to the development of new approaches to structuring narratives. By extending Bakhtin’s concepts to the analysis of interactive immersive audio-visual media I analyse interactive immersive cinema as a first-person experience of a chronotope. Further, I propose to approach chronotope as a real physical s...

  6. KETERAMPILAN MENULIS KREATIF CERPEN MENGGUNAKAN MEDIA AUDIO SISWA KELAS XII SMAN 1 KECAMATAN PAYAKUMBUH

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    Wirda Linda

    2017-04-01

    Full Text Available Writing skills is activities of language serves to produce  written language. Writing can improve intelligence, develop initiative, creativity,, stimulate the willingness and ability to gather information. Students' skills in short stories writing activities is still lacking. This things because teachers use less attractive media. Thus, this study uses audio media to increase students' interest in writing. This study aimed to describe the shost story intrinsic elements and the use of capital letters in Creative Short Story Writing Skills Using Media Audio Class XII SMAN I Payakumbuh District.This research is a quantitative research using descriptive method. The study population class XII students totaling 217 consists of 8 classes. Writer to perform sampling with random random sampling techniques. The instrument of this study is to test performance. Data analysis  in the study: to check the results to write short stories, analyze the data and provide a score based on indicators, and put forward the test results to the classification skills by using a scale of 10.Results showed that  average value of 90.8 are in the range of 86-95% with good qualification. Creative writing skills are evaluated from two short stories specified indicators are: (1 short story creative writing skills in terms of the intrinsic elements of the short story is the 100 that are in the range of 96-100% with impeccable qualifications; (2 The short story creative writing skills in terms of capitalization was 80.8% are in the 76-85 range with good qualifications. Thus, we can conclude the students are already capable in writing short stories as well as the use of capital letters in writing.    

  7. Designing Promotion Strategy of Malang Raya’s Tourism Destination Branding through Audio Visual Media

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    Chanira Nuansa

    2014-04-01

    Full Text Available This study examines the suitability concept of destination branding with existing models of Malang tourism promotion. This research is qualitative by taking the data directly in the form of existing promotional models of Malang, namely: information portal sites, blogs, social networking, and video via the Internet. This study used SWOT analysis to find strengths, weaknesses, opportunities, and threats on existing models of the tourism promotion. The data is analyzed based on destination branding’s concept indicators. Results of analysis are used as a basis in designing solutions for Malang tourism promotion through a new integrated tourism advertising model. Through the analysis we found that video is the most suitable media that used to promote Malang tourism in the form of advertisements. Videos are able to show the objectivity of the fact that intact better through audio-visual form, making it easier to associate the viewer thoughts on the phenomenon of destination. Moreover, video creation of Malang tourism as well as conceptualized ad is still rare. This is an opportunity, because later models of audio-visual advertisements made of this study is expected to be an example for concerned parties to conceptualize the next Malang tourism advertising.Keywords: Advertise, SWOT Analysis, Malang City, tourism promotion

  8. Of Time Engines and Masters An API for Scheduling and Synchronizing the Generation and Playback of Event Sequences and Media Streams for the Web Audio API

    OpenAIRE

    Schnell, Norbert; Saiz, Victor; Barkati, Karim; Goldszmidt, Samuel

    2015-01-01

    International audience; In this article we present an API and a set of Javascript modules for the synchronized scheduling and aligned playback of predetermined sequences of events such as notes, audio segments , and parameter changes as well as media streams (e.g. audio buffers) based on the Web Audio API logical time. The API has been designed to facilitate the development on both ends, the implementation of modules which generate event sequences or media streams as well as the integration o...

  9. PENERAPAN STRATEGI LSQ BERBANTUAN MEDIA AUDIO VISUAL UNTUK MENINGKATKAN HASIL BELAJAR EKONOMI

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    Sholikhah Fakhratus

    2012-10-01

    Full Text Available The process which is being a constraint at High School 1 Kroya is the activities of� students in the learning process still lacking, the students still feel scared and ashamed to ask if� there isn�t� an� encouragement from the teacher, the teacher is still lack in the development of� teach- ing variation. The above is caused of�� needing to the use of� appropriate and varied methods and media as a tool in teaching and learning, one of� the alternatives by applying the learning strategies Learning Start With A Question (LSQ assisted by audio visual media. The design of� this study is an action research class with two cycles, each cycle includes planning, imple- mentation, observation and reflection. The results on the cycle I shows the average of�� student learning outcomes is 71,5 with classical completeness 65.7%, 67.71% of� the student activity in the high category, teacher�s activity in the learning is 67.5% or high category. For the result on the cycle II showed an average of� student learning outcomes 78,6 with classical complete- ness 85.7%, 76.57% of� student activities or activities of� the students in the high category, for teachers� activity is 87.5% with very high criteria.

  10. Pengembangan Media Pembelajaran Sejarah Berbasis Media Audio Visual Situs Purbakala Pugung Raharjo Untuk Meningkatkan Kesadaran Sejarah Siswa Kelas X SMA Negeri 1 Kotagajah

    OpenAIRE

    Samsi Haryanto, Aurora Nandia F , Herman J Waluyo

    2016-01-01

    The Product that expected in this research is a product of learning the history of media based on media audio visual The Site of Ancient Pugung Raharjo that packed in the form of learning video to raise awareness of the history of student learning and achievement. The purpose of this research are (1) to know the media teaching history which have so far carried out in SMA Negeri 1 Kotagajah, (2) to know the media teaching of history which have carried out in SMA Negeri 1 Kotagajah, (3) to know...

  11. Improving Students' Speaking Skill Through Audio Visual Media at 4 Th Grade of Labschool Elementary School East Jakarta

    OpenAIRE

    Herlina

    2014-01-01

    This research aims at helping students to improve their speaking skill by using audio visual media. The subject of the research was fourth grade students of Labschool Elementary School. This research was conducted at Labschool Elementary School Rawamangun East Jakarta at 2nd semester of 2013 with 28 students as participants. The method conducted in this research was classroom action research by Kemmis and McTaggart. The research was carried out in two cycles. The research method is conducted...

  12. PENINGKATAN HASIL BELAJAR MENGGUNAKAN MEDIA AUDIO MUSIK DALAM PEMBELAJARAN MENGETIK MANUAL

    Directory of Open Access Journals (Sweden)

    Septi Mulyani

    2013-02-01

    Full Text Available Latar belakang dalam penelitian ini adalah sebanyak 26 siswa (72,22% belum menerapkan 10 jarinya dalam mengetik naskah dan 22 siswa (61,11% kelas X AP 1 hasil belajarnya masih rendah. Upaya untuk meningkatkan hasil belajar siswa pada pembelajaran mengetik manual, yaitu dilakukan penelitian tindakan kelas dengan menggunakan media audio musik dalam pembelajarannya. �Subjek dalam penelitian ini adalah siswa kelas X AP 1 SMK Bakti Purwokerto Kabupaten Banyumas yang berjumlah 36 siswa. Rancangan penelitian ini merupakan penelitian tindakan kelas dengan dua siklus, setiap siklus meliputi perencanaan, pelaksanaan, pengamatan dan refleksi. Hasil penelitian diperoleh aktivitas belajar siswa pada siklus I termasuk dalam kategori tinggi dengan persentase 65,02% (23 siswa dan pada siklus II sebesar 81,42% (29 siswa dengan kategori sangat tinggi. Kemampuan siswa menerapkan sistem 10 jari buta dalam mengetik pada observasi awal sebesar 27,78% (10 siswa, pada siklus I sebesar 50% (18 siswa, dan 77,78% (28 siswa pada siklus II. Ketuntasan klasikal ketepatan siswa dalam mengetik naskah pada observasi awal sebesar 83,33% (30 siswa, pada siklus I sebesar 63,89% (23 siswa, dan 80,56% (29 siswa pada siklus II. Ketuntasan klasikal kecepatan siswa dalam mengetik naskah pada observasi awal sebesar 61,11% (22 siswa meningkat 38,89% menjadi 100% (36 siswa pada siklus I dan II. Abstract ___________________________________________________________________ The problem found during the research are that 26 students (72,22% have not applied 10 fingers yet in typing the documents and 22 students (61,11% of the X AP 1 students still have low scores. To improve the students� result in the learning of manual typing, an action research by using musical audio as the media in teaching and learning procedure was conducted. The subject of the study is the students of X AP 1 SMK Bakti Purwokerto of Banyumas Regency which consist of 36 students. The design of this study is an action

  13. PENINGKATAN HASIL BELAJAR MENGGUNAKAN MEDIA AUDIO MUSIK DALAM PEMBELAJARAN MENGETIK MANUAL

    Directory of Open Access Journals (Sweden)

    Mulyani Septi

    2012-06-01

    Full Text Available Latar belakang dalam penelitian ini adalah sebanyak 26 siswa (72,22% belum menerapkan 10 jarinya dalam mengetik naskah dan 22 siswa (61,11% kelas X AP 1 hasil belajarnya masih rendah. Upaya untuk meningkatkan hasil belajar siswa pada pembelajaran mengetik manual, yaitu dilakukan penelitian tindakan kelas dengan menggunakan media audio musik dalam pembelajarannya. �Subjek dalam penelitian ini adalah siswa kelas X AP 1 SMK Bakti Purwokerto Kabupaten Banyumas yang berjumlah 36 siswa. Rancangan penelitian ini merupakan penelitian tindakan kelas dengan dua siklus, setiap siklus meliputi perencanaan, pelaksanaan, pengamatan dan refleksi. Hasil penelitian diperoleh aktivitas belajar siswa pada siklus I termasuk dalam kategori tinggi dengan persentase 65,02% (23 siswa dan pada siklus II sebesar 81,42% (29 siswa dengan kategori sangat tinggi. Kemampuan siswa menerapkan sistem 10 jari buta dalam mengetik pada observasi awal sebesar 27,78% (10 siswa, pada siklus I sebesar 50% (18 siswa, dan 77,78% (28 siswa pada siklus II. Ketuntasan klasikal ketepatan siswa dalam mengetik naskah pada observasi awal sebesar 83,33% (30 siswa, pada siklus I sebesar 63,89% (23 siswa, dan 80,56% (29 siswa pada siklus II. Ketuntasan klasikal kecepatan siswa dalam mengetik naskah pada observasi awal sebesar 61,11% (22 siswa meningkat 38,89% menjadi 100% (36 siswa pada siklus I dan II. The problem found during the research are that 26 students (72,22% have not applied 10 fingers yet in typing the documents and 22 students (61,11% of the X AP 1 students still have low scores. To improve the students� result in the learning of manual typing, an action research by using musical audio as the media in teaching and learning procedure was conducted. The subject of the study is the students of X AP 1 SMK Bakti Purwokerto of Banyumas Regency which consist of 36 students. The design of this study is an action research class with two cycles, each cycle includes planning, implementation

  14. PENINGKATAN HASIL BELAJAR GULING DEPAN MELALUI MEDIA PEMBELAJARAN AUDIO VISUAL PADA KELAS VIII SMP NEGERI 5 SEMARANG TAHUN 2013

    Directory of Open Access Journals (Sweden)

    Riski Amanuloh

    2015-05-01

    Full Text Available The purpose of this research is to improve student learning outcomes through audio-visual media in teaching gymnastics at the front of the class bolsters SMP Negeri 5 Semarang. This study used a descriptive quantitative research methods and types of research is a class action consisting of four stages : planning , action , observation , and reflection. Data collection techniques used were tests , observation sheets and questionnaires. In the first cycle of learning outcomes obtained a mean score of 70.2 category ( good taken from three aspects, namely psychomotor assessment criteria a mean value ( 71.8 , affective a mean value ( 68.5 and cognitive the mean value ( 70.4 , the results it can be concluded that student learning outcomes are good enough but needs to be improved. While in Cycle II study results obtained mean score of 85.8 category ( good taken from three aspects , namely psychomotor assessment criteria with a mean value ( 88.3 , affective with a mean value ( 85.0 and cognitive with the mean value ( 84.2 , of the results can be concluded that student learning outcomes have been good ( Completed All in keeping with KKM in the set , namely ( 80.00 . Can be summed scores increased student learning outcomes . Thus the use of audio-visual media in teaching learning gymnastics forward roll can increase motivation , comprehension and learning outcomes eighth grade students of SMP Negeri 5 Semarang .

  15. Audio vs chat: Can media speed explain the differences in productivity?

    OpenAIRE

    Löber, Andreas; Grimm, Sibylle; Schwabe, Gerhard

    2006-01-01

    During the last years chat based instant messaging has become a part of the normal communication culture. Instant messaging based chat is now rapidly becoming a mainstream communication medium even in business environments. The same is becoming true for Voice over IP enabled audio communication. Skype, a high quality VoIP software has been downloaded over 200 million times and internet providers start to sell transparent VoIP products, which are usable with ordinary telephones. But these new ...

  16. Research on the forward modeling of controlled-source audio-frequency magnetotellurics in three-dimensional axial anisotropic media

    Science.gov (United States)

    Wang, Kunpeng; Tan, Handong

    2017-11-01

    Controlled-source audio-frequency magnetotellurics (CSAMT) has developed rapidly in recent years and are widely used in the area of mineral and oil resource exploration as well as other fields. The current theory, numerical simulation, and inversion research are based on the assumption that the underground media have resistivity isotropy. However a large number of rock and mineral physical property tests show the resistivity of underground media is generally anisotropic. With the increasing application of CSAMT, the demand for probe accuracy of practical exploration to complex targets continues to increase. The question of how to evaluate the influence of anisotropic resistivity to CSAMT response is becoming important. To meet the demand for CSAMT response research of resistivity anisotropic media, this paper examines the CSAMT electric equations, derives and realizes a three-dimensional (3D) staggered-grid finite difference numerical simulation method of CSAMT resistivity axial anisotropy. Through building a two-dimensional (2D) resistivity anisotropy geoelectric model, we validate the 3D computation result by comparing it to the result of controlled-source electromagnetic method (CSEM) resistivity anisotropy 2D finite element program. Through simulating a 3D resistivity axial anisotropy geoelectric model, we compare and analyze the responses of equatorial configuration, axial configuration, two oblique sources and tensor source. The research shows that the tensor source is suitable for CSAMT to recognize the anisotropic effect of underground structure.

  17. Audio Papers

    DEFF Research Database (Denmark)

    Groth, Sanne Krogh; Samson, Kristine

    2016-01-01

    of the written paper through its specific use of media, a sonic awareness of aesthetics and materiality, and creative approach towards communication. The audio paper is a performative format working together with an affective and elaborate understanding of language. It is an experiment embracing intellectual...... arguments and creative work, papers and performances, written scholarship and sonic aesthetics. For this special issue of Seismograf, the guidelines for authors and peer reviewers mainly focused on the format. Topic-wise we encouraged dealing with site-specificity and topics related to the island Amager...

  18. Development of Audio and Visual Media to Accompany Sequenced Instructional Programs in Physical Education for the Handicapped. Final Report. July 31, 1972.

    Science.gov (United States)

    Avance, Lyonel D.; Carr, Dorothy B.

    Presented is the final report of a project to develop and field test audio and visual media to accompany developmentally sequenced activities appropriate for a physical education program for handicapped children from preschool through high school. Brief sections cover the following: the purposes and accomplishments of the project; the population…

  19. Students' Perceptions on Using Different Listening Assessment Methods: Audio-Only and Video Media

    Science.gov (United States)

    Sulaiman, Norazean; Muhammad, Ahmad Mazli; Ganapathy, Nurul Nadiah Dewi Faizul; Khairuddin, Zulaikha; Othman, Salwa

    2017-01-01

    The importance and usefulness of incorporating video media elements to teach listening have become part of the general understanding and commonplace in the academia nowadays (Alonso, 2013; Macwan, 2015; Garcia, 2012). Hence, it is of vital importance that students are taught effectively and assessed accordingly on their listening skills. The…

  20. Learning from Audio-Visual Media: The Open University Experience. IET Papers on Broadcasting No. 183.

    Science.gov (United States)

    Bates, A. W.

    This paper describes how audiovisual media have influenced the way students have learned--or failed to learn--at the Open University at Walton Hall. The paper is based in part on results from a large body of research that has repeatedly demonstrated the interrelatedness of a wide range of factors in determining how or what students learn from…

  1. The Social Conditions for a Selection of Instructional Audio-Visual Media.

    Science.gov (United States)

    Mariet, Francois

    1980-01-01

    Economic and social factors such as budgets, availability, and current fashion can cause both manufacturers and users of instructional technology to make irrational choices about use of audiovisual media. Common circumstances surrounding both rational and irrational selections are outlined and discussed. (MSE)

  2. Audio Restoration

    Science.gov (United States)

    Esquef, Paulo A. A.

    The first reproducible recording of human voice was made in 1877 on a tinfoil cylinder phonograph devised by Thomas A. Edison. Since then, much effort has been expended to find better ways to record and reproduce sounds. By the mid-1920s, the first electrical recordings appeared and gradually took over purely acoustic recordings. The development of electronic computers, in conjunction with the ability to record data onto magnetic or optical media, culminated in the standardization of compact disc format in 1980. Nowadays, digital technology is applied to several audio applications, not only to improve the quality of modern and old recording/reproduction techniques, but also to trade off sound quality for less storage space and less taxing transmission capacity requirements.

  3. PENGGUNAAN MEDIA AUDIO VISUAL UNTUK MENINGKATKAN HASIL BELAJAR MATERI MERODA PADA SENAM LANTAI KELAS VIII SMP NEGERI 13 SEMARANG TAHUN 2013/2014

    Directory of Open Access Journals (Sweden)

    Sigit Budi Prastyyo

    2015-01-01

    Full Text Available The purpose of this study was to determine the improvement of teaching physical education in schools through the use of audio-visual media aids the learning outcomes gymnastics floor meroda the eighth grade students of SMP Negeri 13 Semarang. In this research, a classroom action research (CAR cycle , the study was conducted in two cycles of action . Methods of data collection using the methods of documentation , observation , and testing . Analysis of the data using descriptive method by way of student learning outcomes after the action . Based on the results obtained by the use of audio-visual media in the learning material meroda floor exercises can improve learning outcomes eighth grade at Junior High School 13 Semarang 2013/2014 . This is evidenced by the acquisition value of the learning outcomes of each cycle has increased . The average value of students in the first cycle the average test score of students reached 70.51 , reaching 84.72 in the second cycle . Classical completeness in the first cycle of 54.84 % and the second cycle was 90.32 % . From the research results obtained it can be concluded that the learning material meroda floor exercises with the use of audio-visual media can improve learning outcomes students of SMP Negeri 13 Semarang .

  4. UPAYA MENINGKATKAN AKTIVITAS DAN HASIL BELAJAR MATERI APRESIASI TERHADAP KEUNIKAN SENI MUSIK DAERAH SETEMPAT DENGAN MENGGUNAKAN MEDIA AUDIO VISUAL PADA SISWA KELAS VII A SMP NEGERI 3 RANDUDONGKAL

    Directory of Open Access Journals (Sweden)

    Rina Muktinurasih

    2014-02-01

    Full Text Available Folk music is an element of simplicity and regionalism. Improving activities toward the appreciation on the work of art, especially folk music, was carried out by identifying the variety of folk songs, according to the personal view of most students. Over the course of the years, most students can only enjoy music. Because it takes an interest in advance so that students can express the music. Music learningneeds a lot of practice, however most of the times teachers are dominating the classroom time allocation meanwhile the students do not have adequate time to practice. The problems addressed in this study are : (1 whether or not the use of Audio Visual media can improvestudents learning activity in folk music appreciation (2 whether or not the use ofAudio Visual media can improve students learning outcomes in folk music appreciation material. The method used in this study was classroom action research with two cycles, each cycle consists of 4 phases: (1 planning (2 implementation (3 observation/ evaluation, (4 reflection. The research results shows that there were improvements both in the students learning activities and outcome from the use of Audio Visual learning media in folk music appreciation material. During the pre cycle there were only 16 out of 34 students passed (47.07%, onthe first cycle there were 20 out of 34 students passed (74.24%, and finally onthe second cycle there were 28out of 34 students passed (82.35%. Therefore it can be concluded that by the end of this second cycle, the indicator of the overall success has achieved the required frequency.

  5. APLIKASI MEDIA AUDIO-VISUAL DALAM PEMBELAJARAN SPEAKING SKILL DENGAN PENDEKATAN AUDIOLINGUAL: Studi Kasus di MAN Batang

    Directory of Open Access Journals (Sweden)

    Slamet Untung

    2012-10-01

    Full Text Available The research to study the application of audio and visual medium in order to learn speaking skill by audiolingual approach is a good contribution to educational world of senior high school and the Islamic one, particularly, in finding a way to improving the learning component relating directly to the medium and method of learning speaking skill. This research is to find out its significance and relevance. The main variable of this research includes the whole activities of the application of audio and visual medium in learning speaking skill by audio-lingual approach. The data were collected through observation, interview, questionnaire and documentation. This research took place in state Islamic senior high school of Batang in Central Java. The result shows that the application helps the students to speak English correctly and accurately and stresses the message of the speaking skill learning.

  6. Audio Twister

    DEFF Research Database (Denmark)

    Cermak, Daniel; Moreno Garcia, Rodrigo; Monastiridis, Stefanos

    2015-01-01

    Daniel Cermak-Sassenrath, Rodrigo Moreno Garcia, Stefanos Monastiridis. Audio Twister. Installation. P-Hack Copenhagen 2015, Copenhagen, DK, Apr 24, 2015.......Daniel Cermak-Sassenrath, Rodrigo Moreno Garcia, Stefanos Monastiridis. Audio Twister. Installation. P-Hack Copenhagen 2015, Copenhagen, DK, Apr 24, 2015....

  7. The challenge of reducing scientific complexity for different target groups (without losing the essence) - experiences from interdisciplinary audio-visual media production

    Science.gov (United States)

    Hezel, Bernd; Broschkowski, Ephraim; Kropp, Jürgen

    2013-04-01

    The Climate Media Factory originates from an interdisciplinary media lab run by the Film and Television University "Konrad Wolf" Potsdam-Babelsberg (HFF) and the Potsdam Institute for Climate Impact Research (PIK). Climate scientists, authors, producers and media scholars work together to develop media products on climate change and sustainability. We strive towards communicating scientific content via different media platforms reconciling the communication needs of scientists and the audience's need to understand the complexity of topics that are relevant in their everyday life. By presenting four audio-visual examples, that have been designed for very different target groups, we show (i) the interdisciplinary challenges during the production process and the lessons learnt and (ii) possibilities to reach the required degree of simplification without the need for dumbing down the content. "We know enough about climate change" is a short animated film that was produced for the German Agency for International Cooperation (GIZ) for training programs and conferences on adaptation in the target countries including Indonesia, Tunisia and Mexico. "Earthbook" is a short animation produced for "The Year of Science" to raise awareness for the topics of sustainability among digital natives. "What is Climate Engineering?". Produced for the Institute for Advanced Sustainability Studies (IASS) the film is meant for an informed and interested public. "Wimmelwelt Energie!" is a prototype of an iPad application for children from 4-6 years of age to help them learn about different forms of energy and related greenhouse gas emissions.

  8. Audio-visual Materials and Rural Libraries

    Science.gov (United States)

    Escolar-Sobrino, Hipolito

    1972-01-01

    Audio-visual materials enlarge the educational work being done in the classroom and the library. This article examines the various types of audio-visual material and equipment and suggests ways in which audio-visual media can be used economically and efficiently in rural libraries. (Author)

  9. PEMBELAJARAN LAY UP SHOOT MENGGUNAKAN MEDIA AUDIO VISUAL BASIC LAY UP SHOOT UNTUK MENINGKATKAN HASILBELAJAR LAY UP SHOOT PADA SISWA KELAS VIIIA SMP KANISIUS PATI TAHUN 2013/2014

    Directory of Open Access Journals (Sweden)

    Frendy Nurochwan Febryanto

    2015-01-01

    Full Text Available The purpose of this study was to determine the learning lay up shoot using basic audiovisual media shoot lay ups can improve learning outcomes shoot lay ups in class VIIIA Starch Canisius junior year 2013/2014 . This study uses Classroom Action Research ( CAR. The technique of collecting data through observation and assessment of learning outcomes shoot basketball lay up. Data analysis techniques used in this research is descriptive . At the end of the first cycle activity of teachers in teaching basic techniques lay up shoot using audio-visual media reaches 76.19%, whereas at the end of the first cycle of student activity during the learning process lay up shoot using audio-visualmediareaches78.57%. At the end of the second cycle of activity of teachers in teaching basic techniques lay up shoot using audio-visual media reaches 85.71%, whereas at the end of the second cycle of activity of students during the learning process lay up shoot using audio-visual media reaches 92.86%. Based on the results of the study it can be concluded that learning the lay-up shoot using basic audiovisual media shoot lay ups can improve student learning outcomes at Canisius junior class VIIIA Pati year 2013/2014.

  10. Audio watermark a comprehensive foundation using Matlab

    CERN Document Server

    Lin, Yiqing

    2015-01-01

    This book illustrates the commonly used and novel approaches of audio watermarking for copyrights protection. The author examines the theoretical and practical step by step guide to the topic of data hiding in audio signal such as music, speech, broadcast. The book covers new techniques developed by the authors are fully explained and MATLAB programs, for audio watermarking and audio quality assessments and also discusses methods for objectively predicting the perceptual quality of the watermarked audio signals. Explains the theoretical basics of the commonly used audio watermarking techniques Discusses the methods used to objectively and subjectively assess the quality of the audio signals Provides a comprehensive well tested MATLAB programs that can be used efficiently to watermark any audio media

  11. The Use of Chitosan of Pomacea canaliculata Shell as Natural Preservation to Maintain Fruit Quality during Storage Process: Used as Audio Visual Media of Biotechnology Learning

    Directory of Open Access Journals (Sweden)

    Yurike Fransischa Trisnaningrum

    2016-11-01

    Full Text Available Chitosan merupakan turunan kitin yang terbentuk dari proses deasetilasi yang bisa digunakan sebagai bahan pengawet alami yang efektif dan memiliki aktivitas antimikroba.Penelitian ini bertujuan untuk mengetahui perbedaan kandungan vitamin C, pH dan berat dalam buah jeruk, strowberi, dan pisang yang diawetkan dengan chitosan cangkang keong mas selama proses penyimpanan danuntuk mengetahui berapakah konsentrasi chitosan cangkang keong mas yang paling efektif sebagai bahan pengawet buah. Penelitian merupakan True Experimental Research yang dilaksanakan di Laboratorium KimiaUniversitas Muhammadiyah Malang. Rancangan penelitian yang digunakan adalah Rancangan Acak Kelompok (RAK dengan 6 perlakuan dan 4 kali ulangan pada jeruk, strowberi dan pisang yaitu konsentrasi chitosan 1,5%, 2%, 2,5%, 3% dan 3,5%. Analisis data menggunakan analisis Blok Acak dan uji beda jarak nyata Duncan pada taraf signifikansi 0,05.Hasil penelitian menunjukkan ada pengaruh terhadap buah. Perubahan kandungan vitamin C dan berat paling kecil terjadi pada perlakuan 2,5% dan paling besar pada perlakuan kontrol. Pemberian konsentrasi chitosan cangkang keong mas2,5% yang paling efektif mempengaruhi kandungan vitamin C dan berat buah jeruk, strowberi dan pisang. Hasil penelitian diaplikasikan sebagai media audio visual dalam pembelajaran Bioteknologi

  12. DVDs & Audio

    National Research Council Canada - National Science Library

    Mary Lee Bulat; Mahnaz Dar; Sara Lee Paulson; Constance Dickerson

    2015-01-01

    ...). Capturing the fashion, hairstyles, music, and slang of the era, including some expletives, this visual time capsule provides a glimpse of life before cell phones and social media, when teens spent...

  13. Intelligent audio analysis

    CERN Document Server

    Schuller, Björn W

    2013-01-01

    This book provides the reader with the knowledge necessary for comprehension of the field of Intelligent Audio Analysis. It firstly introduces standard methods and discusses the typical Intelligent Audio Analysis chain going from audio data to audio features to audio recognition.  Further, an introduction to audio source separation, and enhancement and robustness are given. After the introductory parts, the book shows several applications for the three types of audio: speech, music, and general sound. Each task is shortly introduced, followed by a description of the specific data and methods applied, experiments and results, and a conclusion for this specific task. The books provides benchmark results and standardized test-beds for a broader range of audio analysis tasks. The main focus thereby lies on the parallel advancement of realism in audio analysis, as too often today’s results are overly optimistic owing to idealized testing conditions, and it serves to stimulate synergies arising from transfer of ...

  14. Television and the Internet: The Role Digital Technologies Play in Adolescents’ Audio-Visual Media Consumption. Young Television Audiences in Catalonia (Spain

    Directory of Open Access Journals (Sweden)

    Meritxell Roca

    2014-03-01

    Full Text Available The aim of this reported study was to investigate adolescents TV consumption habits and perceptions. Although there appears to be no general consensus on how the Internet affects TV consumption by teenagers, and data vary depending on the country, according to our study, Spanish adolescents perceive television as a habit “of the past” and find the computer a device more suited to their recreational and audio-visual consumption needs. The data obtained from eight focus groups of teenagers aged between 12 and 18 and an online survey sent to their parents show that watching TV is an activity usually linked to the home’s communal spaces. On the contrary, online audio-visual consumption (understood as a wider term not limited to just TV shows is perceived by adolescents as a more convenient activity as it adapts to their own schedules and needs.

  15. Back to basics audio

    CERN Document Server

    Nathan, Julian

    1998-01-01

    Back to Basics Audio is a thorough, yet approachable handbook on audio electronics theory and equipment. The first part of the book discusses electrical and audio principles. Those principles form a basis for understanding the operation of equipment and systems, covered in the second section. Finally, the author addresses planning and installation of a home audio system.Julian Nathan joined the audio service and manufacturing industry in 1954 and moved into motion picture engineering and production in 1960. He installed and operated recording theaters in Sydney, Austra

  16. Virtual Microphones for Multichannel Audio Resynthesis

    Directory of Open Access Journals (Sweden)

    Athanasios Mouchtaris

    2003-09-01

    Full Text Available Multichannel audio offers significant advantages for music reproduction, including the ability to provide better localization and envelopment, as well as reduced imaging distortion. On the other hand, multichannel audio is a demanding media type in terms of transmission requirements. Often, bandwidth limitations prohibit transmission of multiple audio channels. In such cases, an alternative is to transmit only one or two reference channels and recreate the rest of the channels at the receiving end. Here, we propose a system capable of synthesizing the required signals from a smaller set of signals recorded in a particular venue. These synthesized “virtual” microphone signals can be used to produce multichannel recordings that accurately capture the acoustics of that venue. Applications of the proposed system include transmission of multichannel audio over the current Internet infrastructure and, as an extension of the methods proposed here, remastering existing monophonic and stereophonic recordings for multichannel rendering.

  17. Use of Effective Audio in E-learning Courseware

    OpenAIRE

    Ray, Kisor

    2015-01-01

    E-Learning uses electronic media, information & communication technologies to provide education to the masses. E-learning deliver hypertext, text, audio, images, animation and videos using desktop standalone computer, local area network based intranet and internet based contents. While producing an e-learning content or course-ware, a major decision making factor is whether to use audio for the benefit of the end users. Generally, three types of audio can be used in e-learning: narration, mus...

  18. Robust AVS Audio Watermarking

    Science.gov (United States)

    Wang, Yong; Huang, Jiwu

    Part III of AVS(China Audio and Video Coding Standard) is the first standard for Hi-Fi audio proposed in China and is becoming more popular in some IT industries. For MP3 audio, some efforts have been made to solve the problems such as copyright pirating and malicious modifications by the way of watermarking. But till now little efforts have been made to solve the same problems for AVS audio. In this paper, we present a novel robust watermarking algorithm which can protect the AVS audio from the above problems. The watermark is embedded into the AVS compressed bit stream. At the extracting end, the watermark bits can be extracted from the compressed bit stream directly without any computation. This algorithm achieves robustness to decoding/recoding attacks, and low complexity of both embedding and extracting while preserves the quality of the audio signals.

  19. Watermarking-Based Digital Audio Data Authentication

    Directory of Open Access Journals (Sweden)

    Jana Dittmann

    2003-09-01

    Full Text Available Digital watermarking has become an accepted technology for enabling multimedia protection schemes. While most efforts concentrate on user authentication, recently interest in data authentication to ensure data integrity has been increasing. Existing concepts address mainly image data. Depending on the necessary security level and the sensitivity to detect changes in the media, we differentiate between fragile, semifragile, and content-fragile watermarking approaches for media authentication. Furthermore, invertible watermarking schemes exist while each bit change can be recognized by the watermark which can be extracted and the original data can be reproduced for high-security applications. Later approaches can be extended with cryptographic approaches like digital signatures. As we see from the literature, only few audio approaches exist and the audio domain requires additional strategies for time flow protection and resynchronization. To allow different security levels, we have to identify relevant audio features that can be used to determine content manipulations. Furthermore, in the field of invertible schemes, there are a bunch of publications for image and video data but no approaches for digital audio to ensure data authentication for high-security applications. In this paper, we introduce and evaluate two watermarking algorithms for digital audio data, addressing content integrity protection. In our first approach, we discuss possible features for a content-fragile watermarking scheme to allow several postproduction modifications. The second approach is designed for high-security applications to detect each bit change and reconstruct the original audio by introducing an invertible audio watermarking concept. Based on the invertible audio scheme, we combine digital signature schemes and digital watermarking to provide a public verifiable data authentication and a reproduction of the original, protected with a secret key.

  20. Principles of Audio Watermarking

    Directory of Open Access Journals (Sweden)

    Martin Hrncar

    2008-01-01

    Full Text Available The article contains a brief overview of modern methods for embedding additional data in audio signals. It could have many reasons - for the purposes of access control or identification related to particular type of audio. This secret information is not “visible” for a user. This concept utilizes the imperfection of human auditory system. Simple data hiding into audio file has been proved in MATLAB.

  1. Categorizing Video Game Audio

    DEFF Research Database (Denmark)

    Westerberg, Andreas Rytter; Schoenau-Fog, Henrik

    2015-01-01

    This paper dives into the subject of video game audio and how it can be categorized in order to deliver a message to a player in the most precise way. A new categorization, with a new take on the diegetic spaces, can be used a tool of inspiration for sound- and game-designers to rethink how...... they can use audio in video games. The conclusion of this study is that the current models' view of the diegetic spaces, used to categorize video game audio, is not t to categorize all sounds. This can however possibly be changed though a rethinking of how the player interprets audio....

  2. Selected Audio-Visual Materials for Consumer Education. [New Version.

    Science.gov (United States)

    Johnston, William L.

    Ninety-two films, filmstrips, multi-media kits, slides, and audio cassettes, produced between 1964 and 1974, are listed in this selective annotated bibliography on consumer education. The major portion of the bibliography is devoted to films and filmstrips. The main topics of the audio-visual materials include purchasing, advertising, money…

  3. Effect of Audio vs. Video on Aural Discrimination of Vowels

    Science.gov (United States)

    McCrocklin, Shannon

    2012-01-01

    Despite the growing use of media in the classroom, the effects of using of audio versus video in pronunciation teaching has been largely ignored. To analyze the impact of the use of audio or video training on aural discrimination of vowels, 61 participants (all students at a large American university) took a pre-test followed by two training…

  4. Roundtable Audio Discussion

    Directory of Open Access Journals (Sweden)

    Chris Bigum

    2007-01-01

    Full Text Available RoundTable on Technology, Teaching and Tools. This is a roundtable audio interview conducted by James Farmer, founder of Edublogs, with Anne Bartlett-Bragg (University of Technology Sydney and Chris Bigum (Deakin University. Skype was used to make and record the audio conference and the resulting sound file was edited by Andrew McLauchlan.

  5. Structure Learning in Audio

    DEFF Research Database (Denmark)

    Nielsen, Andreas Brinch

    By having information about the setting a user is in, a computer is able to make decisions proactively to facilitate tasks for the user. Two approaches are taken in this thesis to achieve more information about an audio environment. One approach is that of classifying audio, and a new approach us......-Gaussian source distributions allowing a much wider use of the method. All methods uses a variety of classification models and model selection algorithms which is a common theme of the thesis....

  6. DAFX Digital Audio Effects

    CERN Document Server

    2011-01-01

    The rapid development in various fields of Digital Audio Effects, or DAFX, has led to new algorithms and this second edition of the popular book, DAFX: Digital Audio Effects has been updated throughout to reflect progress in the field. It maintains a unique approach to DAFX with a lecture-style introduction into the basics of effect processing. Each effect description begins with the presentation of the physical and acoustical phenomena, an explanation of the signal processing techniques to achieve the effect, followed by a discussion of musical applications and the control of effect parameter

  7. Perceptual Audio Hashing Functions

    Directory of Open Access Journals (Sweden)

    Emin Anarım

    2005-07-01

    Full Text Available Perceptual hash functions provide a tool for fast and reliable identification of content. We present new audio hash functions based on summarization of the time-frequency spectral characteristics of an audio document. The proposed hash functions are based on the periodicity series of the fundamental frequency and on singular-value description of the cepstral frequencies. They are found, on one hand, to perform very satisfactorily in identification and verification tests, and on the other hand, to be very resilient to a large variety of attacks. Moreover, we address the issue of security of hashes and propose a keying technique, and thereby a key-dependent hash function.

  8. Alternative Media Technologies for the Open University. A Research Report on Costed Alternatives to the Direct Transmission of Audio-Visual Materials. Final Report. I.E.T. Papers on Broadcasting No. 79.

    Science.gov (United States)

    Bates, Tony; Kern, Larry

    This study examines alternatives to direct transmission of television and radio programs for courses with low student enrollment at the Open University. Examined are cut-off points in terms of student numbers at which alternative means of distributing audio or audio-visual materials become more economical than direct television or radio…

  9. Editing Audio with Audacity

    Directory of Open Access Journals (Sweden)

    Brandon Walsh

    2016-08-01

    Full Text Available For those interested in audio, basic sound editing skills go a long way. Being able to handle and manipulate the materials can help you take control of your object of study: you can zoom in and extract particular moments to analyze, process the audio, and upload the materials to a server to compliment a blog post on the topic. On a more practical level, these skills could also allow you to record and package recordings of yourself or others for distribution. That guest lecture taking place in your department? Record it and edit it yourself! Doing so is a lightweight way to distribute resources among various institutions, and it also helps make the materials more accessible for readers and listeners with a wide variety of learning needs. In this lesson you will learn how to use Audacity to load, record, edit, mix, and export audio files. Sound editing platforms are often expensive and offer extensive capabilities that can be overwhelming to the first-time user, but Audacity is a free and open source alternative that offers powerful capabilities for sound editing with a low barrier for entry. For this lesson we will work with two audio files: a recording of Bach’s Goldberg Variations available from MusOpen and another recording of your own voice that will be made in the course of the lesson. This tutorial uses Audacity 2.1.2, released January 2016.

  10. Portable Audio Design

    DEFF Research Database (Denmark)

    Groth, Sanne Krogh

    2014-01-01

    attention to the specific genre; a grasping of the complex relationship between site and time, the actual and the virtual; and getting aquatint with the specific site’s soundscape by approaching it both intuitively and systematically. These steps will finally lead to an audio production that not only...

  11. Audio Feedback -- Better Feedback?

    Science.gov (United States)

    Voelkel, Susanne; Mello, Luciane V.

    2014-01-01

    National Student Survey (NSS) results show that many students are dissatisfied with the amount and quality of feedback they get for their work. This study reports on two case studies in which we tried to address these issues by introducing audio feedback to one undergraduate (UG) and one postgraduate (PG) class, respectively. In case study one…

  12. Circuit Bodging : Audio Multiplexer

    NARCIS (Netherlands)

    Roeling, E.; Allen, B.

    2010-01-01

    Audio amplifiers usually come with a single, glaring design flaw: Not enough auxiliary inputs. Not only that, but you’re usually required to press a button to switch between the amplifier’s limited number of inputs. This is unacceptable - we have better things to do than change input channels! In

  13. Digital-audio/MIDI sequencers

    National Research Council Canada - National Science Library

    Christopher Breen

    1998-01-01

    .... With these upgrades, both programs now support digital-audio fade and cross-fade transitions. If you are looking for the most complete MIDI/digital-audio solution right out of the box, consider Digital Performer...

  14. An introduction to audio content analysis applications in signal processing and music informatics

    CERN Document Server

    Lerch, Alexander

    2012-01-01

    "With the proliferation of digital audio distribution over digital media, audio content analysis is fast becoming a requirement for designers of intelligent signal-adaptive audio processing systems. Written by a well-known expert in the field, this book provides quick access to different analysis algorithms and allows comparison between different approaches to the same task, making it useful for newcomers to audio signal processing and industry experts alike. A review of relevant fundamentals in audio signal processing, psychoacoustics, and music theory, as well as downloadable MATLAB files are also included"--

  15. The audio expert everything you need to know about audio

    CERN Document Server

    Winer, Ethan

    2012-01-01

    The Audio Expert is a comprehensive reference that covers all aspects of audio, with many practical, as well as theoretical, explanations. Providing in-depth descriptions of how audio really works, using common sense plain-English explanations and mechanical analogies with minimal math, the book is written for people who want to understand audio at the deepest, most technical level, without needing an engineering degree. It's presented in an easy-to-read, conversational tone, and includes more than 400 figures and photos augmenting the text.The Audio Expert takes th

  16. MASS MEDIA IN ADULT EDUCATION, SEMINAR ON THE CONTRIBUTION OF RESEARCH TO THE USE OF AUDIO-VISUAL MASS MEDIA IN ADULT EDUCATION (PRAGUE, OCTOBER 5-10, 1966).

    Science.gov (United States)

    Czechoslovakian UNESCO Commission, Prague.

    THIS INTERNATIONAL SEMINAR, ORGANIZED BY THE CENTRAL COMMITTEE OF THE CZECHOSLOVAKIAN TRADE UNION OF EDUCATIONAL AND CULTURAL WORKERS AND SUPPORTED BY UNESCO AND THE CZECHOSLOVAKIAN UNESCO COMMISSION, BROUGHT TOGETHER 118 SPECIALISTS IN MASS MEDIA FROM 14 COUNTRIES. THE AIMS OF THE SEMINAR WERE TO ACCELERATE WORK RELATING TO CONTRIBUTIONS OF…

  17. Structuring Broadcast Audio for Information Access

    Science.gov (United States)

    Gauvain, Jean-Luc; Lamel, Lori

    2003-12-01

    One rapidly expanding application area for state-of-the-art speech recognition technology is the automatic processing of broadcast audiovisual data for information access. Since much of the linguistic information is found in the audio channel, speech recognition is a key enabling technology which, when combined with information retrieval techniques, can be used for searching large audiovisual document collections. Audio indexing must take into account the specificities of audio data such as needing to deal with the continuous data stream and an imperfect word transcription. Other important considerations are dealing with language specificities and facilitating language portability. At Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur (LIMSI), broadcast news transcription systems have been developed for seven languages: English, French, German, Mandarin, Portuguese, Spanish, and Arabic. The transcription systems have been integrated into prototype demonstrators for several application areas such as audio data mining, structuring audiovisual archives, selective dissemination of information, and topic tracking for media monitoring. As examples, this paper addresses the spoken document retrieval and topic tracking tasks.

  18. 77 FR 42764 - Distribution of the 2005, 2006, 2007 and 2008 Digital Audio Recording Technology Royalty Funds...

    Science.gov (United States)

    2012-07-20

    ... Copyright Royalty Board Distribution of the 2005, 2006, 2007 and 2008 Digital Audio Recording Technology... the digital audio recording technology royalty fees in the 2005, 2006, 2007 and 2008 Musical Works... royalties on digital audio recording devices and media that are distributed in the United States. 17 U.S.C...

  19. Creating unreal audio

    OpenAIRE

    Rudsengen, Mathias Flaten

    2014-01-01

    Creating unreal audio” refers to the act of designing a sound effect that is intended to sound like a completely fictional object. This thesis is a practical venture into digital audio design. During the process of creating a sound effect anchored in a specific thematic framework, I will describe my work process and the challenges and problems faced, showing my personal work process and how modern digital sound effect creation can be undertaken. To provide context, I will also describe and re...

  20. Beyond podcasting: creative approaches to designing educational audio

    Directory of Open Access Journals (Sweden)

    Andrew Middleton

    2009-12-01

    Full Text Available This paper discusses a university-wide pilot designed to encourage academics to creatively explore learner-centred applications for digital audio. Participation in the pilot was diverse in terms of technical competence, confidence and contextual requirements and there was little prior experience of working with digital audio. Many innovative approaches were taken to using audio in a blended context including student-generated vox pops, audio feedback models, audio conversations and task-setting. A podcast was central to the pilot itself, providing a common space for the 25 participants, who were also supported by materials in several other formats. An analysis of podcast interviews involving pilot participants provided the data informing this case study. This paper concludes that audio has the potential to promote academic creativity in engaging students through media intervention. However, institutional scalability is dependent upon the availability of suitable timely support mechanisms that can address the lack of technical confidence evident in many staff. If that is in place, audio can be widely adopted by anyone seeking to add a new layer of presence and connectivity through the use of voice.

  1. Advances in audio watermarking based on singular value decomposition

    CERN Document Server

    Dhar, Pranab Kumar

    2015-01-01

    This book introduces audio watermarking methods for copyright protection, which has drawn extensive attention for securing digital data from unauthorized copying. The book is divided into two parts. First, an audio watermarking method in discrete wavelet transform (DWT) and discrete cosine transform (DCT) domains using singular value decomposition (SVD) and quantization is introduced. This method is robust against various attacks and provides good imperceptible watermarked sounds. Then, an audio watermarking method in fast Fourier transform (FFT) domain using SVD and Cartesian-polar transformation (CPT) is presented. This method has high imperceptibility and high data payload and it provides good robustness against various attacks. These techniques allow media owners to protect copyright and to show authenticity and ownership of their material in a variety of applications.   ·         Features new methods of audio watermarking for copyright protection and ownership protection ·         Outl...

  2. Small signal audio design

    CERN Document Server

    Self, Douglas

    2014-01-01

    Learn to use inexpensive and readily available parts to obtain state-of-the-art performance in all the vital parameters of noise, distortion, crosstalk and so on. With ample coverage of preamplifiers and mixers and a new chapter on headphone amplifiers, this practical handbook provides an extensive repertoire of circuits that can be put together to make almost any type of audio system.A resource packed full of valuable information, with virtually every page revealing nuggets of specialized knowledge not found elsewhere. Essential points of theory that bear on practical performance are lucidly

  3. Hiding Data in Audio Signal

    Science.gov (United States)

    Bhattacharyya, Debnath; Dutta, Poulami; Balitanas, Maricel O.; Kim, Tai-Hoon; Das, Purnendu

    This paper describes the LSB technique for secure data transfer. Secret information can be hidden inside all sorts of cover information: text, images, audio, video and more. Embedding secret messages in digital sound is usually a more difficult process. Varieties of techniques for embedding information in digital audio have been established. These are parity coding, phase coding, spread spectrum, echo hiding, LSB. Least significant bits (LSB) insertion is one of the simplest approaches to embedding information in audio file.

  4. Easy Method for Inventory-Taking and Classification of Audio-Visual Material. First Edition, Revised.

    Science.gov (United States)

    Lamy-Rousseau, Francoise

    The alphanumeric code is a system put forward with the hope that it will bring uniformity in methods of inventory-taking and describing all sorts of audio-visual material which can be used in either French or English. The alphanumeric code classifies audio-visual materials in such a way as to indicate the exact nature of the media, the format, the…

  5. Media

    National Research Council Canada - National Science Library

    Emily Wexler

    2010-01-01

    .... Tradigital allows us to use online behaviour to track the effectiveness of online and offline media, not simply the correlation of TV airings with search activity, but also by employing a bevy...

  6. The Lowdown on Audio Downloads

    Science.gov (United States)

    Farrell, Beth

    2010-01-01

    First offered to public libraries in 2004, downloadable audiobooks have grown by leaps and bounds. According to the Audio Publishers Association, their sales today account for 21% of the spoken-word audio market. It hasn't been easy, however. WMA. DRM. MP3. AAC. File extensions small on letters but very big on consequences for librarians,…

  7. Efficient audio power amplification - challenges

    Energy Technology Data Exchange (ETDEWEB)

    Andersen, Michael A.E.

    2005-07-01

    For more than a decade efficient audio power amplification has evolved and today switch-mode audio power amplification in various forms are the state-of-the-art. The technical steps that lead to this evolution are described and in addition many of the challenges still to be faced and where extensive research and development are needed is covered. (au)

  8. Efficient Audio Power Amplification - Challenges

    DEFF Research Database (Denmark)

    Andersen, Michael Andreas E.

    2005-01-01

    For more than a decade efficient audio power amplification has evolved and today switch-mode audio power amplification in various forms are the state-of-the-art. The technical steps that lead to this evolution are described and in addition many of the challenges still to be faced and where...... extensive research and development are needed is covered....

  9. Analysis of Audio Fingerprinting Techniques

    Science.gov (United States)

    Siva Sankaran, Satish Kumar

    The goal of this thesis is to compare various audio fingerprinting algorithms under a common framework. An audio fingerprint is a compact content-based signature that uniquely summarizes an audio recording. In this thesis, acoustic fingerprints are based on prominent peaks extracted from the spectrogram of the audio signal in question. A spectrogram is a visual representation of the spectrum of frequencies in an audio signal as it varies with time. Some of the applications of audio fingerprinting include but are not limited to music identification, advertisement detection, channel identification in TV and radio broadcasts. Currently, there are several fingerprinting techniques that employ different fingerprinting algorithms. However, there is no study or concrete proof that suggests one algorithm is better in comparison with the other algorithms. In this thesis, some of the feasible techniques employed in audio fingerprint extraction such as Same-Band Frequency analysis, Cross-Band Frequency analysis, use of Mel Frequency Banks, and use of Mel Frequency Cepstral Coefficients (MFCC) are analyzed and compared under the same framework.

  10. PENGGUNAAN MEDIA AUDIO VISUAL UNTUK MENINGKATKAN MOTIVASI DAN HASIL BELAJAR MATA PELAJARAN SISTEM BAHAN BAKAR MOTOR BENSIN SISWA KELAS XI TSM DI SMK BINA MANDIRI KLAMPOK BANJARNEGARA TAHUN AJARAN 2015/2016

    Directory of Open Access Journals (Sweden)

    Arifin Prasetya

    2016-06-01

    Full Text Available This study aimed to know (1 the use of audio visual to improve learning motivation and (2 learning achievement of motor fuel system among the eleventh grade students of vocational school Bina Mandiri Klampok Banjarnegara in academic year 2015/2016. The type of this study was a classroom action research. Data collection techniques used questionnaire to know learning motivation and test to know learning achievement of motor fuel system. The research instruments were questionnaire and test. Data analysis technique used qualitative analysis.  This study shows that (1 the use of audio visual could improve learning motivation among the eleventh grade students of vocational school Bina Mandiri Klampok Banjarnegara in academic year 2015/2016. The average percentage of learning motivation in cycle I was 70.03 in fair category at the interval between 65,85 <  ≤ 84,15. The average percentage of learning motivation in cycle II was 84.75 in fair category at the interval between 84,15 <  ≤ 102,45. The average percentage of learning motivation in cycle III was 100.34 in fair category at the interval between 65,85  <  ≤ 84,15.  (2 The use of audio visual could improve learning achievement of motor fuel system among the eleventh grade students of vocational school Bina Mandiri Klampok Banjarnegara in academic year 2015/2016. The average score of test in pre cycle was 61.29, cycle I was 71.39, cycle II was 76.59, and cycle III was 81.15.  Based on these results, it could be concluded that the use of audio visual could improve learning motivation and learning achievement of motor fuel system among the eleventh grade students of vocational school Bina Mandiri Klampok Banjarnegara in academic year 2015/2016

  11. ENERGY STAR Certified Audio Video

    Data.gov (United States)

    U.S. Environmental Protection Agency — Certified models meet all ENERGY STAR requirements as listed in the Version 3.0 ENERGY STAR Program Requirements for Audio Video Equipment that are effective as of...

  12. A centralized audio presentation manager

    Energy Technology Data Exchange (ETDEWEB)

    Papp, A.L. III; Blattner, M.M.

    1994-05-16

    The centralized audio presentation manager addresses the problems which occur when multiple programs running simultaneously attempt to use the audio output of a computer system. Time dependence of sound means that certain auditory messages must be scheduled simultaneously, which can lead to perceptual problems due to psychoacoustic phenomena. Furthermore, the combination of speech and nonspeech audio is examined; each presents its own problems of perceptibility in an acoustic environment composed of multiple auditory streams. The centralized audio presentation manager receives abstract parameterized message requests from the currently running programs, and attempts to create and present a sonic representation in the most perceptible manner through the use of a theoretically and empirically designed rule set.

  13. WLAN Technologies for Audio Delivery

    Directory of Open Access Journals (Sweden)

    Nicolas-Alexander Tatlas

    2007-01-01

    Full Text Available Audio delivery and reproduction for home or professional applications may greatly benefit from the adoption of digital wireless local area network (WLAN technologies. The most challenging aspect of such integration relates the synchronized and robust real-time streaming of multiple audio channels to multipoint receivers, for example, wireless active speakers. Here, it is shown that current WLAN solutions are susceptible to transmission errors. A detailed study of the IEEE802.11e protocol (currently under ratification is also presented and all relevant distortions are assessed via an analytical and experimental methodology. A novel synchronization scheme is also introduced, allowing optimized playback for multiple receivers. The perceptual audio performance is assessed for both stereo and 5-channel applications based on either PCM or compressed audio signals.

  14. Tourism research and audio methods

    DEFF Research Database (Denmark)

    Jensen, Martin Trandberg

    2016-01-01

    Audio methods enriches sensuous tourism ethnographies. • The note suggests five research avenues for future auditory scholarship. • Sensuous tourism research has neglected the role of sounds in embodied tourism experiences.......• Audio methods enriches sensuous tourism ethnographies. • The note suggests five research avenues for future auditory scholarship. • Sensuous tourism research has neglected the role of sounds in embodied tourism experiences....

  15. Audio Steganography with Embedded Text

    Science.gov (United States)

    Teck Jian, Chua; Chai Wen, Chuah; Rahman, Nurul Hidayah Binti Ab.; Hamid, Isredza Rahmi Binti A.

    2017-08-01

    Audio steganography is about hiding the secret message into the audio. It is a technique uses to secure the transmission of secret information or hide their existence. It also may provide confidentiality to secret message if the message is encrypted. To date most of the steganography software such as Mp3Stego and DeepSound use block cipher such as Advanced Encryption Standard or Data Encryption Standard to encrypt the secret message. It is a good practice for security. However, the encrypted message may become too long to embed in audio and cause distortion of cover audio if the secret message is too long. Hence, there is a need to encrypt the message with stream cipher before embedding the message into the audio. This is because stream cipher provides bit by bit encryption meanwhile block cipher provide a fixed length of bits encryption which result a longer output compare to stream cipher. Hence, an audio steganography with embedding text with Rivest Cipher 4 encryption cipher is design, develop and test in this project.

  16. Modeling Audio Fingerprints : Structure, Distortion, Capacity

    NARCIS (Netherlands)

    Doets, P.J.O.

    2010-01-01

    An audio fingerprint is a compact low-level representation of a multimedia signal. An audio fingerprint can be used to identify audio files or fragments in a reliable way. The use of audio fingerprints for identification consists of two phases. In the enrollment phase known content is fingerprinted,

  17. Introduction to audio analysis a MATLAB approach

    CERN Document Server

    Giannakopoulos, Theodoros

    2014-01-01

    Introduction to Audio Analysis serves as a standalone introduction to audio analysis, providing theoretical background to many state-of-the-art techniques. It covers the essential theory necessary to develop audio engineering applications, but also uses programming techniques, notably MATLAB®, to take a more applied approach to the topic. Basic theory and reproducible experiments are combined to demonstrate theoretical concepts from a practical point of view and provide a solid foundation in the field of audio analysis. Audio feature extraction, audio classification, audio segmentation, au

  18. Location audio simplified capturing your audio and your audience

    CERN Document Server

    Miles, Dean

    2014-01-01

    From the basics of using camera, handheld, lavalier, and shotgun microphones to camera calibration and mixer set-ups, Location Audio Simplified unlocks the secrets to clean and clear broadcast quality audio no matter what challenges you face. Author Dean Miles applies his twenty-plus years of experience as a professional location operator to teach the skills, techniques, tips, and secrets needed to produce high-quality production sound on location. Humorous and thoroughly practical, the book covers a wide array of topics, such as:* location selection* field mixing* boo

  19. A Joint Audio-Visual Approach to Audio Localization

    DEFF Research Database (Denmark)

    Jensen, Jesper Rindom; Christensen, Mads Græsbøll

    2015-01-01

    Localization of audio sources is an important research problem, e.g., to facilitate noise reduction. In the recent years, the problem has been tackled using distributed microphone arrays (DMA). A common approach is to apply direction-of-arrival (DOA) estimation on each array (denoted as nodes...... time-of-flight cameras. Moreover, we propose an optimal method for weighting such DOA and range information for audio localization. Our experiments on both synthetic and real data show that there is a clear, potential advantage of using the joint audiovisual localization framework....

  20. Evaluation of Audio Compression Artifacts

    Directory of Open Access Journals (Sweden)

    M. Herrera Martinez

    2007-01-01

    Full Text Available This paper deals with subjective evaluation of audio-coding systems. From this evaluation, it is found that, depending on the type of signal and the algorithm of the audio-coding system, different types of audible errors arise. These errors are called coding artifacts. Although three kinds of artifacts are perceivable in the auditory domain, the author proposes that in the coding domain there is only one common cause for the appearance of the artifact, inefficient tracking of transient-stochastic signals. For this purpose, state-of-the art audio coding systems use a wide range of signal processing techniques, including application of the wavelet transform, which is described here. 

  1. Digital Audio/Video for Computer- and Web-Based Instruction for Training Rural Special Education Personnel.

    Science.gov (United States)

    Ludlow, Barbara L.; Foshay, John B.; Duff, Michael C.

    Video presentations of teaching episodes in home, school, and community settings and audio recordings of parents' and professionals' views can be important adjuncts to personnel preparation in special education. This paper describes instructional applications of digital media and outlines steps in producing audio and video segments. Digital audio…

  2. Audio power amplifier design handbook

    CERN Document Server

    Self, Douglas

    2013-01-01

    This book is essential for audio power amplifier designers and engineers for one simple reason...it enables you as a professional to develop reliable, high-performance circuits. The Author Douglas Self covers the major issues of distortion and linearity, power supplies, overload, DC-protection and reactive loading. He also tackles unusual forms of compensation and distortion produced by capacitors and fuses. This completely updated fifth edition includes four NEW chapters including one on The XD Principle, invented by the author, and used by Cambridge Audio. Cro

  3. A Guide to Audio-Visual References: Selection and Ordering Sources.

    Science.gov (United States)

    Bonn, Thomas L., Comp.

    Audio-visual reference sources and finding guides to identify media for classroom utilization are compiled in this list of sources at State University of New York College at Cortland libraries. Citations with annotations and library locations are included under the subject headings: (1) general sources for all media formats; (2) reviews, guides,…

  4. The Audio-Visual Man.

    Science.gov (United States)

    Babin, Pierre, Ed.

    A series of twelve essays discuss the use of audiovisuals in religious education. The essays are divided into three sections: one which draws on the ideas of Marshall McLuhan and other educators to explore the newest ideas about audiovisual language and faith, one that describes how to learn and use the new language of audio and visual images, and…

  5. Audio-Visual Materials Catalog.

    Science.gov (United States)

    Anderson (M.D.) Hospital and Tumor Inst., Houston, TX.

    This catalog lists 27 audiovisual programs produced by the Department of Medical Communications of the University of Texas M. D. Anderson Hospital and Tumor Institute for public distribution. Video tapes, 16 mm. motion pictures and slide/audio series are presented dealing mostly with cancer and related subjects. The programs are intended for…

  6. Digital Augmented Reality Audio Headset

    Directory of Open Access Journals (Sweden)

    Jussi Rämö

    2012-01-01

    Full Text Available Augmented reality audio (ARA combines virtual sound sources with the real sonic environment of the user. An ARA system can be realized with a headset containing binaural microphones. Ideally, the ARA headset should be acoustically transparent, that is, it should not cause audible modification to the surrounding sound. A practical implementation of an ARA mixer requires a low-latency headphone reproduction system with additional equalization to compensate for the attenuation and the modified ear canal resonances caused by the headphones. This paper proposes digital IIR filters to realize the required equalization and evaluates a real-time prototype ARA system. Measurements show that the throughput latency of the digital prototype ARA system can be less than 1.4 ms, which is sufficiently small in practice. When the direct and processed sounds are combined in the ear, a comb filtering effect is brought about and appears as notches in the frequency response. The comb filter effect in speech and music signals was studied in a listening test and it was found to be inaudible when the attenuation is 20 dB. Insert ARA headphones have a sufficient attenuation at frequencies above about 1 kHz. The proposed digital ARA system enables several immersive audio applications, such as a virtual audio tourist guide and audio teleconferencing.

  7. Haptic and Audio Interaction Design

    DEFF Research Database (Denmark)

    This book constitutes the refereed proceedings of the 5th International Workshop on Haptic and Audio Interaction Design, HAID 2010 held in Copenhagen, Denmark, in September 2010. The 21 revised full papers presented were carefully reviewed and selected for inclusion in the book. The papers are or...

  8. Steganography: Applying and Evaluating Two Algorithms for Embedding Audio Data in an Image

    OpenAIRE

    Khaled Nasser ElSayed

    2015-01-01

    Information transmission is increasing with grow of using WEB. So, information security has become very important. Security of data and information is the major task for scientists and political and military people. One of the most secure methods is embedding data (steganography) in different media like text, audio, digital images. this paper present two experiments in steganography of digital audio data file. It applies empirically, two algorithms in steganography in images through random in...

  9. Comparative study of digital audio steganography techniques

    National Research Council Canada - National Science Library

    Djebbar, Fatiha; Ayad, Beghdad; Meraim, Karim Abed; Hamam, Habib

    2012-01-01

    .... We focus in this paper on digital audio steganography, which has emerged as a prominent source of data hiding across novel telecommunication technologies such as covered voice-over-IP, audio conferencing, etc...

  10. [Audio-visual aids and tropical medicine].

    Science.gov (United States)

    Morand, J J

    1989-01-01

    The author presents a list of the audio-visual productions about Tropical Medicine, as well as of their main characteristics. He thinks that the audio-visual educational productions are often dissociated from their promotion; therefore, he invites the future creator to forward his work to the Audio-Visual Health Committee.

  11. Audio Frequency Analysis in Mobile Phones

    Science.gov (United States)

    Aguilar, Horacio Munguía

    2016-01-01

    A new experiment using mobile phones is proposed in which its audio frequency response is analyzed using the audio port for inputting external signal and getting a measurable output. This experiment shows how the limited audio bandwidth used in mobile telephony is the main cause of the poor speech quality in this service. A brief discussion is…

  12. Bit rates in audio source coding

    NARCIS (Netherlands)

    Veldhuis, Raymond N.J.

    1992-01-01

    The goal is to introduce and solve the audio coding optimization problem. Psychoacoustic results such as masking and excitation pattern models are combined with results from rate distortion theory to formulate the audio coding optimization problem. The solution of the audio optimization problem is a

  13. Mediatheque - digitization and preservation of audio content in RTV Slovenia

    Directory of Open Access Journals (Sweden)

    Martin Žvelc

    2011-01-01

    Full Text Available RTV Slovenia’s archives contain large amounts of audio and video materials, various documents and music scores, and most of them are still in the analogue format. Widespread digitization has revolutionized the processes and ways of creating content in the digital format, recorded on different media. Such records also require new ways of preservation. In the article the development and structure of the Mediateque department at RTV Slovenia is presented. Also an overview to the preservation model of audio content is given. Due to rapid technological changes the audio content was the most critical and the first to be digitized. The intensive work in Mediatheque began in 2008 and after two years Radio Slovenia has developed modern system of permanent storage of audio content. Radio Slovenia’s Digital Archive meets all the standards and regulations applicable to modern archival systems. In the article the application of Mediarc software is also presented, which as it could be used for digitizing and permanent storage of TV Slovenia’s video archives.

  14. Presence and the utility of audio spatialization

    DEFF Research Database (Denmark)

    Bormann, Karsten

    2005-01-01

    The primary concern of this paper is whether the utility of audio spatialization, as opposed to the fidelity of audio spatialization, impacts presence. An experiment is reported that investigates the presence-performance relationship by decoupling spatial audio fidelity (realism) from task...... or not, while the presence questionnaire used by Slater and coworkers (see Tromp et al., 1998) was more sensitive to whether audio was fully spatialized or not. Finally, having the sound source active positively impacts the assessment of the audio while negatively impacting subjects' assessment...

  15. Towards a Hybrid Audio Coder

    OpenAIRE

    Daudet, Laurent; Molla, Stéphane; Torrésani, Bruno

    2004-01-01

    International audience; The main features of a novel approach for audio signal encoding are described. The approach combines non-linear transform coding and structured approximation techniques, together with hybrid modeling of the signal class under consideration. Essentially, several different components of the signal are estimated and transform coded using an appropriately chosen orthonormal basis. Different models and estimation procedures are discussed, and numerical results are provided.

  16. HTML5 Media

    CERN Document Server

    Powers, Shelley

    2011-01-01

    If you're a web developer or designer familiar with CSS and JavaScript, this tightly focused introduction shows you how to add HTML5 media elements to your web pages, and how to provide custom controls for letting web visitors interact with the content. You'll also learn how to provide subtitles and captions, using file formats that work in browsers now. This book includes code samples and downloadable examples to help you take full advantage of audio and video in your web pages. Ensure your audio or video works in all browsers that support HTML5 media elementsLearn about widely supported me

  17. AudioRegent: Exploiting SimpleADL and SoX for Digital Audio Delivery

    Directory of Open Access Journals (Sweden)

    Nitin Arora

    2010-06-01

    Full Text Available AudioRegent is a command-line Python script currently being used by the University of Alabama Libraries’ Digital Services to create web-deliverable MP3s from regions within archival audio files. In conjunction with a small-footprint XML file called SimpleADL and SoX, an open-source command-line audio editor, AudioRegent batch processes archival audio files, allowing for one or many user-defined regions, particular to each audio file, to be extracted with additional audio processing in a transparent manner that leaves the archival audio file unaltered. Doing so has alleviated many of the tensions of cumbersome workflows, complicated documentation, preservation concerns, and reliance on expensive closed-source GUI audio applications.

  18. A Method to Detect AAC Audio Forgery

    Directory of Open Access Journals (Sweden)

    Qingzhong Liu

    2015-08-01

    Full Text Available Advanced Audio Coding (AAC, a standardized lossy compression scheme for digital audio, which was designed to be the successor of the MP3 format, generally achieves better sound quality than MP3 at similar bit rates. While AAC is also the default or standard audio format for many devices and AAC audio files may be presented as important digital evidences, the authentication of the audio files is highly needed but relatively missing. In this paper, we propose a scheme to expose tampered AAC audio streams that are encoded at the same encoding bit-rate. Specifically, we design a shift-recompression based method to retrieve the differential features between the re-encoded audio stream at each shifting and original audio stream, learning classifier is employed to recognize different patterns of differential features of the doctored forgery files and original (untouched audio files. Experimental results show that our approach is very promising and effective to detect the forgery of the same encoding bit-rate on AAC audio streams. Our study also shows that shift recompression-based differential analysis is very effective for detection of the MP3 forgery at the same bit rate.

  19. PENGEMBANGAN MULTIMEDIA PEMBELAJARAN FISIKA BERBASIS AUDIO-VIDEO EKSPERIMEN LISTRIK DINAMIS DI SMP

    Directory of Open Access Journals (Sweden)

    P. Rante

    2013-10-01

    Full Text Available Penelitian pengembangan ini dilakukan dengan tujuan untuk melihat profil pengembangan multimedia pembelajaran fisika berbasis audio-video eksperimen listrik dinamis yang dapat menjadi solusi ketidakterlaksanaan praktikum di sekolah. Hasil penelitian menunjukkan bahwa propil multimedia berbasis audio-video eksperimen dari segi tampilan menarik, fasilitas runtut, sistematis dan praktis digunakan serta menjadi solusi ketidakterlaksanaan praktikum di sekolah. Produk akhir adalah sebuah paket CD autorun multimedia pembelajaran interaktif sebagai media pembelajaran mandiri dan sebagai media presentase yang dilengkapi perangkat pembelajaran untuk guru. This research aims to see the profile of multimedia learning development on physics based audio-video on the topic dynamic electricity experiment that may become a solution of practicum that not mastered well in the school. The result shows that the profile of develop multimedia based audio-video experiment has interesting display, harmonious facilities, systematic and practical in used as well as become a solution of the practicum that not mastered yet. The final product produced an auto run CD package of interactive learning multimedia as a self learning media and as a representation of media that equipped with teaching and learning media for teacher.

  20. Audio-visual gender recognition

    Science.gov (United States)

    Liu, Ming; Xu, Xun; Huang, Thomas S.

    2007-11-01

    Combining different modalities for pattern recognition task is a very promising field. Basically, human always fuse information from different modalities to recognize object and perform inference, etc. Audio-Visual gender recognition is one of the most common task in human social communication. Human can identify the gender by facial appearance, by speech and also by body gait. Indeed, human gender recognition is a multi-modal data acquisition and processing procedure. However, computational multimodal gender recognition has not been extensively investigated in the literature. In this paper, speech and facial image are fused to perform a mutli-modal gender recognition for exploring the improvement of combining different modalities.

  1. pyAudioAnalysis: An Open-Source Python Library for Audio Signal Analysis.

    Science.gov (United States)

    Giannakopoulos, Theodoros

    2015-01-01

    Audio information plays a rather important role in the increasing digital content that is available today, resulting in a need for methodologies that automatically analyze such content: audio event recognition for home automations and surveillance systems, speech recognition, music information retrieval, multimodal analysis (e.g. audio-visual analysis of online videos for content-based recommendation), etc. This paper presents pyAudioAnalysis, an open-source Python library that provides a wide range of audio analysis procedures including: feature extraction, classification of audio signals, supervised and unsupervised segmentation and content visualization. pyAudioAnalysis is licensed under the Apache License and is available at GitHub (https://github.com/tyiannak/pyAudioAnalysis/). Here we present the theoretical background behind the wide range of the implemented methodologies, along with evaluation metrics for some of the methods. pyAudioAnalysis has been already used in several audio analysis research applications: smart-home functionalities through audio event detection, speech emotion recognition, depression classification based on audio-visual features, music segmentation, multimodal content-based movie recommendation and health applications (e.g. monitoring eating habits). The feedback provided from all these particular audio applications has led to practical enhancement of the library.

  2. pyAudioAnalysis: An Open-Source Python Library for Audio Signal Analysis.

    Directory of Open Access Journals (Sweden)

    Theodoros Giannakopoulos

    Full Text Available Audio information plays a rather important role in the increasing digital content that is available today, resulting in a need for methodologies that automatically analyze such content: audio event recognition for home automations and surveillance systems, speech recognition, music information retrieval, multimodal analysis (e.g. audio-visual analysis of online videos for content-based recommendation, etc. This paper presents pyAudioAnalysis, an open-source Python library that provides a wide range of audio analysis procedures including: feature extraction, classification of audio signals, supervised and unsupervised segmentation and content visualization. pyAudioAnalysis is licensed under the Apache License and is available at GitHub (https://github.com/tyiannak/pyAudioAnalysis/. Here we present the theoretical background behind the wide range of the implemented methodologies, along with evaluation metrics for some of the methods. pyAudioAnalysis has been already used in several audio analysis research applications: smart-home functionalities through audio event detection, speech emotion recognition, depression classification based on audio-visual features, music segmentation, multimodal content-based movie recommendation and health applications (e.g. monitoring eating habits. The feedback provided from all these particular audio applications has led to practical enhancement of the library.

  3. Modified BTC Algorithm for Audio Signal Coding

    Directory of Open Access Journals (Sweden)

    TOMIC, S.

    2016-11-01

    Full Text Available This paper describes modification of a well-known image coding algorithm, named Block Truncation Coding (BTC and its application in audio signal coding. BTC algorithm was originally designed for black and white image coding. Since black and white images and audio signals have different statistical characteristics, the application of this image coding algorithm to audio signal presents a novelty and a challenge. Several implementation modifications are described in this paper, while the original idea of the algorithm is preserved. The main modifications are performed in the area of signal quantization, by designing more adequate quantizers for audio signal processing. The result is a novel audio coding algorithm, whose performance is presented and analyzed in this research. The performance analysis indicates that this novel algorithm can be successfully applied in audio signal coding.

  4. Digital audio watermarking fundamentals, techniques and challenges

    CERN Document Server

    Xiang, Yong; Yan, Bin

    2017-01-01

    This book offers comprehensive coverage on the most important aspects of audio watermarking, from classic techniques to the latest advances, from commonly investigated topics to emerging research subdomains, and from the research and development achievements to date, to current limitations, challenges, and future directions. It also addresses key topics such as reversible audio watermarking, audio watermarking with encryption, and imperceptibility control methods. The book sets itself apart from the existing literature in three main ways. Firstly, it not only reviews classical categories of audio watermarking techniques, but also provides detailed descriptions, analysis and experimental results of the latest work in each category. Secondly, it highlights the emerging research topic of reversible audio watermarking, including recent research trends, unique features, and the potentials of this subdomain. Lastly, the joint consideration of audio watermarking and encryption is also reviewed. With the help of this...

  5. Semantic Context Detection Using Audio Event Fusion

    Directory of Open Access Journals (Sweden)

    Cheng Wen-Huang

    2006-01-01

    Full Text Available Semantic-level content analysis is a crucial issue in achieving efficient content retrieval and management. We propose a hierarchical approach that models audio events over a time series in order to accomplish semantic context detection. Two levels of modeling, audio event and semantic context modeling, are devised to bridge the gap between physical audio features and semantic concepts. In this work, hidden Markov models (HMMs are used to model four representative audio events, that is, gunshot, explosion, engine, and car braking, in action movies. At the semantic context level, generative (ergodic hidden Markov model and discriminative (support vector machine (SVM approaches are investigated to fuse the characteristics and correlations among audio events, which provide cues for detecting gunplay and car-chasing scenes. The experimental results demonstrate the effectiveness of the proposed approaches and provide a preliminary framework for information mining by using audio characteristics.

  6. Media multitasking and the role of task relevance in background advertising processing

    NARCIS (Netherlands)

    Smit, E.G.; Segijn, C.M.; van de Giessen, W.; Wottrich, V.M.; Vandeberg, L.; Voorveld, H.A.M.; Zabkar, V.; Eisend, M.

    2017-01-01

    People are increasingly combining multiple media simultaneously (e.g., checking Facebook while watching television, listening to the radio while reading). Simultaneously using multiple media with different screens, audio sources, and content is referred to as media multitasking (Chinchanachokchai et

  7. MODIS: an audio motif discovery software

    OpenAIRE

    Catanese, Laurence; Souviraà-Labastie, Nathan; Qu, Bingqing; Campion, Sébastien; Gravier, Guillaume; Vincent, Emmanuel; Bimbot, Frédéric

    2013-01-01

    International audience; MODIS is a free speech and audio motif discovery software developed at IRISA Rennes. Motif discovery is the task of discovering and collecting occurrences of repeating patterns in the absence of prior knowledge, or training material. MODIS is based on a generic approach to mine repeating audio sequences, with tolerance to motif variability. The algorithm implementation allows to process large audio streams at a reasonable speed where motif discovery often requires huge...

  8. Making the Switch to Digital Audio

    Directory of Open Access Journals (Sweden)

    Shannon Gwin Mitchell

    2004-12-01

    Full Text Available In this article, the authors describe the process of converting from analog to digital audio data. They address the step-by-step decisions that they made in selecting hardware and software for recording and converting digital audio, issues of system integration, and cost considerations. The authors present a brief description of how digital audio is being used in their current research project and how it has enhanced the “quality” of their qualitative research.

  9. Language Transfer of Audio Word2Vec: Learning Audio Segment Representations without Target Language Data

    OpenAIRE

    Shen, Chia-Hao; Sung, Janet Y.; Lee, Hung-yi

    2017-01-01

    Audio Word2Vec offers vector representations of fixed dimensionality for variable-length audio segments using Sequence-to-sequence Autoencoder (SA). These vector representations are shown to describe the sequential phonetic structures of the audio segments to a good degree, with real world applications such as query-by-example Spoken Term Detection (STD). This paper examines the capability of language transfer of Audio Word2Vec. We train SA from one language (source language) and use it to ex...

  10. NFL Films audio, video, and film production facilities

    Science.gov (United States)

    Berger, Russ; Schrag, Richard C.; Ridings, Jason J.

    2003-04-01

    The new NFL Films 200,000 sq. ft. headquarters is home for the critically acclaimed film production that preserves the NFL's visual legacy week-to-week during the football season, and is also the technical plant that processes and archives football footage from the earliest recorded media to the current network broadcasts. No other company in the country shoots more film than NFL Films, and the inclusion of cutting-edge video and audio formats demands that their technical spaces continually integrate the latest in the ever-changing world of technology. This facility houses a staggering array of acoustically sensitive spaces where music and sound are equal partners with the visual medium. Over 90,000 sq. ft. of sound critical technical space is comprised of an array of sound stages, music scoring stages, audio control rooms, music writing rooms, recording studios, mixing theaters, video production control rooms, editing suites, and a screening theater. Every production control space in the building is designed to monitor and produce multi channel surround sound audio. An overview of the architectural and acoustical design challenges encountered for each sophisticated listening, recording, viewing, editing, and sound critical environment will be discussed.

  11. Communications and media services

    Science.gov (United States)

    Mcculla, James W.; Kukowski, James F.

    1990-01-01

    NASA's internal and external communication methods are reviewed. NASA information services for the media, for the public, and for employees are discussed. Consideration is given to electron information distribution, the NASA TV-audio system, the NASA broadcast news service, astronaut appearances, technology and information exhibits, speaker services, and NASA news reports for internal communications. Also, the NASA worldwide electronic mail network is described and trends for future NASA communications and media services are outlined.

  12. Multimodal indexing of digital audio-visual documents: A case study for cultural heritage data

    NARCIS (Netherlands)

    Carmichael, J.; Larson, M.; Marlow, J.; Newman, E.; Clough, P.; Oomen, J.; Sav, S.

    2008-01-01

    This paper describes a multimedia multimodal information access sub-system (MIAS) for digital audio-visual documents, typically presented in streaming media format. The system is designed to provide both professional and general users with entry points into video documents that are relevant to their

  13. Creative Description: Audio Describing Artistic Films for Individuals with Visual Impairments

    Science.gov (United States)

    Walczak, Agnieszka

    2017-01-01

    Audio description is a service aimed at widening accessibility to visual media such as film and television for all individuals, especially for people with sensory disabilities. It offers people who are blind or have low vision "a verbal screen onto the world" (Di´az Cintas, Orero, & Remael, 2007, p. 13). The standard rule when…

  14. Audio-Tutorial Programming with Exceptional Children

    Science.gov (United States)

    Hofmeister, Alan

    1973-01-01

    The findings from the application of audio-tutorial programing in three curriculum areas with three groups of exceptional children are reported. The findings suggest that audio-tutorial programing has qualities capable of meeting some of the instructional needs of exceptional children. (Author)

  15. A listening test system for automotive audio

    DEFF Research Database (Denmark)

    Christensen, Flemming; Geoff, Martin; Minnaar, Pauli

    2005-01-01

    This paper describes a system for simulating automotive audio through headphones for the purposes of conducting listening experiments in the laboratory. The system is based on binaural technology and consists of a component for reproducing the sound of the audio system itself and a component...

  16. Audio-Visual Technician | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Controls the inventory of portable audio-visual equipment and mobile telephones within IDRC's loans library. Delivers, installs, uninstalls and removes equipment reserved by IDRC staff through the automated booking system. Participates in the planning process for upgrade and /or acquisition of new audio-visual ...

  17. Audio-Tutorial Instruction in Medicine.

    Science.gov (United States)

    Boyle, Gloria J.; Herrick, Merlyn C.

    This progress report concerns an audio-tutorial approach used at the University of Missouri-Columbia School of Medicine. Instructional techniques such as slide-tape presentations, compressed speech audio tapes, computer-assisted instruction (CAI), motion pictures, television, microfiche, and graphic and printed materials have been implemented,…

  18. Detecting double compression of audio signal

    Science.gov (United States)

    Yang, Rui; Shi, Yun Q.; Huang, Jiwu

    2010-01-01

    MP3 is the most popular audio format nowadays in our daily life, for example music downloaded from the Internet and file saved in the digital recorder are often in MP3 format. However, low bitrate MP3s are often transcoded to high bitrate since high bitrate ones are of high commercial value. Also audio recording in digital recorder can be doctored easily by pervasive audio editing software. This paper presents two methods for the detection of double MP3 compression. The methods are essential for finding out fake-quality MP3 and audio forensics. The proposed methods use support vector machine classifiers with feature vectors formed by the distributions of the first digits of the quantized MDCT (modified discrete cosine transform) coefficients. Extensive experiments demonstrate the effectiveness of the proposed methods. To the best of our knowledge, this piece of work is the first one to detect double compression of audio signal.

  19. Digital signal processor for silicon audio playback devices; Silicon audio saisei kikiyo digital signal processor

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    The digital audio signal processor (DSP) TC9446F series has been developed silicon audio playback devices with a memory medium of, e.g., flash memory, DVD players, and AV devices, e.g., TV sets. It corresponds to AAC (advanced audio coding) (2ch) and MP3 (MPEG1 Layer3), as the audio compressing techniques being used for transmitting music through an internet. It also corresponds to compressed types, e.g., Dolby Digital, DTS (digital theater system) and MPEG2 audio, being adopted for, e.g., DVDs. It can carry a built-in audio signal processing program, e.g., Dolby ProLogic, equalizer, sound field controlling, and 3D sound. TC9446XB has been lined up anew. It adopts an FBGA (fine pitch ball grid array) package for portable audio devices. (translated by NEDO)

  20. Automatic processing of CERN video, audio and photo archives

    Science.gov (United States)

    Kwiatek, M.

    2008-07-01

    The digitalization of CERN audio-visual archives, a major task currently in progress, will generate over 40 TB of video, audio and photo files. Storing these files is one issue, but a far more important challenge is to provide long-time coherence of the archive and to make these files available on-line with minimum manpower investment. An infrastructure, based on standard CERN services, has been implemented, whereby master files, stored in the CERN Distributed File System (DFS), are discovered and scheduled for encoding into lightweight web formats based on predefined profiles. Changes in master files, conversion profiles or in the metadata database (read from CDS, the CERN Document Server) are automatically detected and the media re-encoded whenever necessary. The encoding processes are run on virtual servers provided on-demand by the CERN Server Self Service Centre, so that new servers can be easily configured to adapt to higher load. Finally, the generated files are made available from the CERN standard web servers with streaming implemented using Windows Media Services.

  1. Implementing Audio-CASI on Windows' Platforms.

    Science.gov (United States)

    Cooley, Philip C; Turner, Charles F

    1998-01-01

    Audio computer-assisted self interviewing (Audio-CASI) technologies have recently been shown to provide important and sometimes dramatic improvements in the quality of survey measurements. This is particularly true for measurements requiring respondents to divulge highly sensitive information such as their sexual, drug use, or other sensitive behaviors. However, DOS-based Audio-CASI systems that were designed and adopted in the early 1990s have important limitations. Most salient is the poor control they provide for manipulating the video presentation of survey questions. This article reports our experiences adapting Audio-CASI to Microsoft Windows 3.1 and Windows 95 platforms. Overall, our Windows-based system provided the desired control over video presentation and afforded other advantages including compatibility with a much wider array of audio devices than our DOS-based Audio-CASI technologies. These advantages came at the cost of increased system requirements --including the need for both more RAM and larger hard disks. While these costs will be an issue for organizations converting large inventories of PCS to Windows Audio-CASI today, this will not be a serious constraint for organizations and individuals with small inventories of machines to upgrade or those purchasing new machines today.

  2. High-Fidelity Piezoelectric Audio Device

    Science.gov (United States)

    Woodward, Stanley E.; Fox, Robert L.; Bryant, Robert G.

    2003-01-01

    ModalMax is a very innovative means of harnessing the vibration of a piezoelectric actuator to produce an energy efficient low-profile device with high-bandwidth high-fidelity audio response. The piezoelectric audio device outperforms many commercially available speakers made using speaker cones. The piezoelectric device weighs substantially less (4 g) than the speaker cones which use magnets (10 g). ModalMax devices have extreme fabrication simplicity. The entire audio device is fabricated by lamination. The simplicity of the design lends itself to lower cost. The piezoelectric audio device can be used without its acoustic chambers and thereby resulting in a very low thickness of 0.023 in. (0.58 mm). The piezoelectric audio device can be completely encapsulated, which makes it very attractive for use in wet environments. Encapsulation does not significantly alter the audio response. Its small size (see Figure 1) is applicable to many consumer electronic products, such as pagers, portable radios, headphones, laptop computers, computer monitors, toys, and electronic games. The audio device can also be used in automobile or aircraft sound systems.

  3. Implementing Audio-CASI on Windows’ Platforms

    Science.gov (United States)

    Cooley, Philip C.; Turner, Charles F.

    2011-01-01

    Audio computer-assisted self interviewing (Audio-CASI) technologies have recently been shown to provide important and sometimes dramatic improvements in the quality of survey measurements. This is particularly true for measurements requiring respondents to divulge highly sensitive information such as their sexual, drug use, or other sensitive behaviors. However, DOS-based Audio-CASI systems that were designed and adopted in the early 1990s have important limitations. Most salient is the poor control they provide for manipulating the video presentation of survey questions. This article reports our experiences adapting Audio-CASI to Microsoft Windows 3.1 and Windows 95 platforms. Overall, our Windows-based system provided the desired control over video presentation and afforded other advantages including compatibility with a much wider array of audio devices than our DOS-based Audio-CASI technologies. These advantages came at the cost of increased system requirements --including the need for both more RAM and larger hard disks. While these costs will be an issue for organizations converting large inventories of PCS to Windows Audio-CASI today, this will not be a serious constraint for organizations and individuals with small inventories of machines to upgrade or those purchasing new machines today. PMID:22081743

  4. Audio-Visual Classification of Sports Types

    DEFF Research Database (Denmark)

    Gade, Rikke; Abou-Zleikha, Mohamed; Christensen, Mads Græsbøll

    2015-01-01

    In this work we propose a method for classification of sports types from combined audio and visual features ex- tracted from thermal video. From audio Mel Frequency Cepstral Coefficients (MFCC) are extracted, and PCA are applied to reduce the feature space to 10 dimensions. From the visual modality...... short trajectories are constructed to rep- resent the motion of players. From these, four motion fea- tures are extracted and combined directly with audio fea- tures for classification. A k-nearest neighbour classifier is applied for classification of 180 1-minute video sequences from three sports types...

  5. Design of an audio advertisement dataset

    Science.gov (United States)

    Fu, Yutao; Liu, Jihong; Zhang, Qi; Geng, Yuting

    2015-12-01

    Since more and more advertisements swarm into radios, it is necessary to establish an audio advertising dataset which could be used to analyze and classify the advertisement. A method of how to establish a complete audio advertising dataset is presented in this paper. The dataset is divided into four different kinds of advertisements. Each advertisement's sample is given in *.wav file format, and annotated with a txt file which contains its file name, sampling frequency, channel number, broadcasting time and its class. The classifying rationality of the advertisements in this dataset is proved by clustering the different advertisements based on Principal Component Analysis (PCA). The experimental results show that this audio advertisement dataset offers a reliable set of samples for correlative audio advertisement experimental studies.

  6. CERN automatic audio-conference service

    CERN Document Server

    Sierra Moral, R

    2010-01-01

    Scientists from all over the world need to collaborate with CERN on a daily basis. They must be able to communicate effectively on their joint projects at any time; as a result telephone conferences have become indispensable and widely used. Managed by 6 operators, CERN already has more than 20000 hours and 5700 audio-conferences per year. However, the traditional telephone based audio-conference system needed to be modernized in three ways. Firstly, to provide the participants with more autonomy in the organization of their conferences; secondly, to eliminate the constraints of manual intervention by operators; and thirdly, to integrate the audio-conferences into a collaborative working framework. The large number, and hence cost, of the conferences prohibited externalization and so the CERN telecommunications team drew up a specification to implement a new system. It was decided to use a new commercial collaborative audio-conference solution based on the SIP protocol. The system was tested as the first Euro...

  7. Spatial audio quality perception (part 1)

    DEFF Research Database (Denmark)

    Conetta, R.; Brookes, T.; Rumsey, F.

    2015-01-01

    Spatial audio processes (SAPs) commonly encountered in consumer audio reproduction systems are known to produce a range of impairments to spatial quality. By way of two listening tests, this paper investigated the degree of degradation of the spatial quality of six 5-channel audio recordings...... resulting from 48 such SAPs. Perceived degradation also depends on the particular listeners, the program content, and the listening location. For example, combining off-center listener with another SAP can reduce spatial quality significantly when compared to listening to that SAP from a central location....... The choice of the SAP can have a large influence on the degree of degradation. Taken together these findings and the quality-annotated database can guide the development of a regression model of perceived overall spatial audio quality, incorporating previously developed spatially-relevant feature...

  8. EVALUASI KEPUASAN PENGGUNA TERHADAP APLIKASI AUDIO BOOKS

    Directory of Open Access Journals (Sweden)

    Raditya Maulana Anuraga

    2017-02-01

    Full Text Available Listeno is the first application audio books in Indonesia so that the users can get the book in audio form like listen to music, Listeno have problems in a feature request Listeno offline mode that have not been released, a security problem mp3 files that must be considered, and the target Listeno not yet reached 100,000 active users. This research has the objective to evaluate user satisfaction to Audio Books with research method approach, Nielsen. The analysis in this study using Importance Performance Analysis (IPA is combined with the index of User Satisfaction (IKP based on the indicators used are: Benefit (Usefulness, Utility (Utility, Usability (Usability, easy to understand (Learnability, Efficient (efficiency , Easy to remember (Memorability, Error (Error, and satisfaction (satisfaction. The results showed Applications User Satisfaction Audio books are quite satisfied with the results of the calculation IKP 69.58%..

  9. Web Audio/Video Streaming Tool

    Science.gov (United States)

    Guruvadoo, Eranna K.

    2003-01-01

    In order to promote NASA-wide educational outreach program to educate and inform the public of space exploration, NASA, at Kennedy Space Center, is seeking efficient ways to add more contents to the web by streaming audio/video files. This project proposes a high level overview of a framework for the creation, management, and scheduling of audio/video assets over the web. To support short-term goals, the prototype of a web-based tool is designed and demonstrated to automate the process of streaming audio/video files. The tool provides web-enabled users interfaces to manage video assets, create publishable schedules of video assets for streaming, and schedule the streaming events. These operations are performed on user-defined and system-derived metadata of audio/video assets stored in a relational database while the assets reside on separate repository. The prototype tool is designed using ColdFusion 5.0.

  10. Definición de audio

    OpenAIRE

    Montañez, Luis A.; Cabrera, Juan G.

    2015-01-01

    Descripción del significado de Audio como objeto de estudio por distintos autores, y su diferenciación con el significado de Sonido. De esta forma se define Audio como una señal eléctrica con características similares en su forma de onda en comparación a la de una señal sonora, teniendo en cuenta la señal sonora corresponde a presión en u medio físico, mientras que la señal de Audio es una tensión o voltaje definida como señal análoga. En este orden de ideas, el Audio se concibe como una seña...

  11. Spatial audio reproduction with primary ambient extraction

    CERN Document Server

    He, JianJun

    2017-01-01

    This book first introduces the background of spatial audio reproduction, with different types of audio content and for different types of playback systems. A literature study on the classical and emerging Primary Ambient Extraction (PAE) techniques is presented. The emerging techniques aim to improve the extraction performance and also enhance the robustness of PAE approaches in dealing with more complex signals encountered in practice. The in-depth theoretical study helps readers to understand the rationales behind these approaches. Extensive objective and subjective experiments validate the feasibility of applying PAE in spatial audio reproduction systems. These experimental results, together with some representative audio examples and MATLAB codes of the key algorithms, illustrate clearly the differences among various approaches and also help readers gain insights on selecting different approaches for different applications.

  12. Using audio visuals to illustrate concepts

    OpenAIRE

    Hodgson, Tom

    2005-01-01

    This short pedagogic paper investigates the use of audio visual presentation techniques to enhance teaching and learning in the classroom. It looks at the current 'MTV' generation of students who find it difficult to concentrate for long periods of time.

  13. Augmenting Environmental Interaction in Audio Feedback Systems

    Directory of Open Access Journals (Sweden)

    Seunghun Kim

    2016-04-01

    Full Text Available Audio feedback is defined as a positive feedback of acoustic signals where an audio input and output form a loop, and may be utilized artistically. This article presents new context-based controls over audio feedback, leading to the generation of desired sonic behaviors by enriching the influence of existing acoustic information such as room response and ambient noise. This ecological approach to audio feedback emphasizes mutual sonic interaction between signal processing and the acoustic environment. Mappings from analyses of the received signal to signal-processing parameters are designed to emphasize this specificity as an aesthetic goal. Our feedback system presents four types of mappings: approximate analyses of room reverberation to tempo-scale characteristics, ambient noise to amplitude and two different approximations of resonances to timbre. These mappings are validated computationally and evaluated experimentally in different acoustic conditions.

  14. CERN automatic audio-conference service

    CERN Multimedia

    Sierra Moral, R

    2009-01-01

    Scientists from all over the world need to collaborate with CERN on a daily basis. They must be able to communicate effectively on their joint projects at any time; as a result telephone conferences have become indispensable and widely used. Managed by 6 operators, CERN already has more than 20000 hours and 5700 audio-conferences per year. However, the traditional telephone based audio-conference system needed to be modernized in three ways. Firstly, to provide the participants with more autonomy in the organization of their conferences; secondly, to eliminate the constraints of manual intervention by operators; and thirdly, to integrate the audio-conferences into a collaborative working framework. The large number, and hence cost, of the conferences prohibited externalization and so the CERN telecommunications team drew up a specification to implement a new system. It was decided to use a new commercial collaborative audio-conference solution based on the SIP protocol. The system was tested as the first Euro...

  15. Design and implementation of an audio indicator

    Science.gov (United States)

    Zheng, Shiyong; Li, Zhao; Li, Biqing

    2017-04-01

    This page proposed an audio indicator which designed by using C9014, LED by operational amplifier level indicator, the decimal count/distributor of CD4017. The experimental can control audibly neon and holiday lights through the signal. Input audio signal after C9014 composed of operational amplifier for power amplifier, the adjust potentiometer extraction amplification signal input voltage CD4017 distributors make its drive to count, then connect the LED display running situation of the circuit. This simple audio indicator just use only U1 and can produce two colors LED with the audio signal tandem come pursuit of the running effect, from LED display the running of the situation takes can understand the general audio signal. The variation in the audio and the frequency of the signal and the corresponding level size. In this light can achieve jump to change, slowly, atlas, lighting four forms, used in home, hotel, discos, theater, advertising and other fields, and a wide range of USES, rU1h life in a modern society.

  16. Mobile Access to Audio and Video Collections in Libraries and Other Cultural Institutions

    Directory of Open Access Journals (Sweden)

    Carolyn Doi

    2011-05-01

    Full Text Available Mobile devices have become commonplace, and are increasingly capable of accessing multi-media resources such as audio and video. Many libraries maintain multi-media digital collections that could be accessed on mobile devices. Mobile devices, however, offer unique display and technical challenges that need to be addressed. The benefits of mobile access to library collections include the promise of increased use and an enhanced user experience. In this article we provide a detailed discussion of the issues related to mobile delivery of digital media, including a literature review, an overview of significant technical issues, and three case studies.

  17. Collusion-resistant audio fingerprinting system in the modulated complex lapped transform domain.

    Directory of Open Access Journals (Sweden)

    Jose Juan Garcia-Hernandez

    Full Text Available Collusion-resistant fingerprinting paradigm seems to be a practical solution to the piracy problem as it allows media owners to detect any unauthorized copy and trace it back to the dishonest users. Despite the billionaire losses in the music industry, most of the collusion-resistant fingerprinting systems are devoted to digital images and very few to audio signals. In this paper, state-of-the-art collusion-resistant fingerprinting ideas are extended to audio signals and the corresponding parameters and operation conditions are proposed. Moreover, in order to carry out fingerprint detection using just a fraction of the pirate audio clip, block-based embedding and its corresponding detector is proposed. Extensive simulations show the robustness of the proposed system against average collusion attack. Moreover, by using an efficient Fast Fourier Transform core and standard computer machines it is shown that the proposed system is suitable for real-world scenarios.

  18. Embodiment and Materialization in "Neutral" Materials: Using Audio-Visual Analysis to Discern Social Representations

    Directory of Open Access Journals (Sweden)

    Anna Hedenus

    2015-11-01

    Full Text Available The use of audio-visual media puts bodies literally in focus, but there is as yet surprisingly little in the methodology literature about how to analyze the body in this kind of material. The aim of this article is to illustrate how qualitative audio-visual analysis, focusing on embodiment and materialization, may be used to discern social representations; this is of especial interest when studying materials which have an explicit ambition to achieve "neutrality" without reference to certain kinds of bodies. Filmed occupational descriptions—produced by the Swedish Employment Agency (SEA—are analyzed and discussed. The examples presented in the article illustrate how various forms of audio-visual analysis—content analysis, sequential analysis and narrative analysis—can be used to reveal how social representations of occupations and practitioners are embodied and materialized in these films. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs160139

  19. Audio Mining with emphasis on Music Genre Classification

    DEFF Research Database (Denmark)

    Meng, Anders

    2004-01-01

    in searching / retrieving audio effectively is needed. Currently, search engines such as e.g. Google, AltaVista etc. do not search into audio files, but uses either the textual information attached to the audio file or the textual information around the audio. Also in the hearing aid industries around...

  20. Audio stream classification for multimedia database search

    Science.gov (United States)

    Artese, M.; Bianco, S.; Gagliardi, I.; Gasparini, F.

    2013-03-01

    Search and retrieval of huge archives of Multimedia data is a challenging task. A classification step is often used to reduce the number of entries on which to perform the subsequent search. In particular, when new entries of the database are continuously added, a fast classification based on simple threshold evaluation is desirable. In this work we present a CART-based (Classification And Regression Tree [1]) classification framework for audio streams belonging to multimedia databases. The database considered is the Archive of Ethnography and Social History (AESS) [2], which is mainly composed of popular songs and other audio records describing the popular traditions handed down generation by generation, such as traditional fairs, and customs. The peculiarities of this database are that it is continuously updated; the audio recordings are acquired in unconstrained environment; and for the non-expert human user is difficult to create the ground truth labels. In our experiments, half of all the available audio files have been randomly extracted and used as training set. The remaining ones have been used as test set. The classifier has been trained to distinguish among three different classes: speech, music, and song. All the audio files in the dataset have been previously manually labeled into the three classes above defined by domain experts.

  1. Near-field Localization of Audio

    DEFF Research Database (Denmark)

    Jensen, Jesper Rindom; Christensen, Mads Græsbøll

    2014-01-01

    Localization of audio sources using microphone arrays has been an important research problem for more than two decades. Many traditional methods for solving the problem are based on a two-stage procedure: first, information about the audio source, such as time differences-of-arrival (TDOAs......) and gain ratios-of-arrival (GROAs) between microphones is estimated, and, second, this knowledge is used to localize the audio source. These methods often have a low computational complexity, but this comes at the cost of a limited estimation accuracy. Therefore, we propose a new localization approach......, where the desired signal is modeled using TDOAs and GROAs, which are determined by the source location. This facilitates the derivation of one-stage, maximum likelihood methods under a white Gaussian noise assumption that is applicable in both near- and far-field scenarios. Simulations show...

  2. Audio Description as a Pedagogical Tool

    Directory of Open Access Journals (Sweden)

    Georgina Kleege

    2015-05-01

    Full Text Available Audio description is the process of translating visual information into words for people who are blind or have low vision. Typically such description has focused on films, museum exhibitions, images and video on the internet, and live theater. Because it allows people with visual impairments to experience a variety of cultural and educational texts that would otherwise be inaccessible, audio description is a mandated aspect of disability inclusion, although it remains markedly underdeveloped and underutilized in our classrooms and in society in general. Along with increasing awareness of disability, audio description pushes students to practice close reading of visual material, deepen their analysis, and engage in critical discussions around the methodology, standards and values, language, and role of interpretation in a variety of academic disciplines. We outline a few pedagogical interventions that can be customized to different contexts to develop students' writing and critical thinking skills through guided description of visual material.

  3. Spatial audio quality perception (part 2)

    DEFF Research Database (Denmark)

    Conetta, R.; Brookes, T.; Rumsey, F.

    2015-01-01

    encountered in consumer audio reproduction. A generalizable model employing just five metrics and two principal components performs well in its prediction of the quality over a range of program types. Commonly-encountered SAPs can have a large deleterious effect on several spatial attributes including source...... location, envelopment, coverage angle, ensemble width, and spaciousness. They can also impact timbre, and changes to timbre can then influence spatial perception. Previously obtained data was used to build a regression model of perceived spatial audio quality in terms of spatial and timbral metrics......The QESTRAL (Quality Evaluation of Spatial Transmission and Reproduction using an Artificial Listener) system is intended to be an artificial-listener-based evaluation system capable of predicting the perceived spatial quality degradations resulting from SAPs (Spatial Audio Processes) commonly...

  4. Evaluation of Perceived Spatial Audio Quality

    Directory of Open Access Journals (Sweden)

    Jan Berg

    2006-04-01

    Full Text Available The increased use of audio applications capable of conveying enhanced spatial quality puts focus on how such a quality should be evaluated. Different approaches to evaluation of perceived quality are briefly discussed and a new technique is introduced. In a series of experiment, attributes were elicited from subjects, tested and subsequently used for derivation of evaluation scales that were feasible for subjective evaluation of the spatial quality of certain multichannel stimuli. The findings of these experiments led to the development of a novel method for evaluation of spatial audio in surround sound systems. Parts of the method were subsequently implemented in the OPAQUE software prototype designed to facilitate the elicitation process. The prototype was successfully tested in a pilot experiment. The experiments show that attribute scales derived from subjects' personal constructs are functional for evaluation of perceived spatial audio quality. Finally, conclusions on the importance of spatial quality evaluation of new applications are made.

  5. Audio Technology and Mobile Human Computer Interaction

    DEFF Research Database (Denmark)

    Chamberlain, Alan; Bødker, Mads; Hazzard, Adrian

    2017-01-01

    Audio-based mobile technology is opening up a range of new interactive possibilities. This paper brings some of those possibilities to light by offering a range of perspectives based in this area. It is not only the technical systems that are developing, but novel approaches to the design and und...... and understanding of audio-based mobile systems are evolving to offer new perspectives on interaction and design and support such systems to be applied in areas, such as the humanities.......Audio-based mobile technology is opening up a range of new interactive possibilities. This paper brings some of those possibilities to light by offering a range of perspectives based in this area. It is not only the technical systems that are developing, but novel approaches to the design...

  6. The audio-visual revolution: do we really need it?

    Science.gov (United States)

    Townsend, I

    1979-03-01

    In the United Kingdom, The audio-visual revolution has steadily gained converts in the nursing profession. Nurse tutor courses now contain information on the techniques of educational technology and schools of nursing increasingly own (or wish to own) many of the sophisticated electronic aids to teaching that abound. This is taking place at a time of hitherto inexperienced crisis and change. Funds have been or are being made available to buy audio-visual equipment. But its purchase and use relies on satisfying personal whim, prejudice or educational fashion, not on considerations of educational efficiency. In the rush of enthusiasm, the overwhelmed teacher (everywhere; the phenomenon is not confined to nursing) forgets to ask the searching, critical questions: 'Why should we use this aid?','How effective is it?','And, at what?'. Influential writers in this profession have repeatedly called for a more responsible attitude towards published research work of other fields. In an attempt to discover what is known about the answers to this group of questions, an eclectic look at media research is taken and the widespread dissatisfaction existing amongst international educational technologists is noted. The paper isolates out of the literature several causative factors responsible for the present state of affairs. Findings from the field of educational television are cited as representative of an aid which has had a considerable amount of time and research directed at it. The concluding part of the paper shows the decisions to be taken in using or not using educational media as being more complicated than might at first appear.

  7. Synchronization and comparison of Lifelog audio recordings

    DEFF Research Database (Denmark)

    Nielsen, Andreas Brinch; Hansen, Lars Kai

    2008-01-01

    We investigate concurrent ‘Lifelog’ audio recordings to locate segments from the same environment. We compare two techniques earlier proposed for pattern recognition in extended audio recordings, namely cross-correlation and a fingerprinting technique. If successful, such alignment can be used...... as a preprocessing step to select and synchronize recordings before further processing. The two methods perform similarly in classification, but fingerprinting scales better with the number of recordings, while cross-correlation can offer sample resolution synchronization. We propose and investigate the benefits...... of combining the two. In particular we show that the combination allows sample resolution synchronization and scalability....

  8. Frequency Hopping Method for Audio Watermarking

    Directory of Open Access Journals (Sweden)

    A. Anastasijević

    2012-11-01

    Full Text Available This paper evaluates the degradation of audio content for a perceptible removable watermark. Two different approaches to embedding the watermark in the spectral domain were investigated. The frequencies for watermark embedding are chosen according to a pseudorandom sequence making the methods robust. Consequentially, the lower quality audio can be used for promotional purposes. For a fee, the watermark can be removed with a secret watermarking key. Objective and subjective testing was conducted in order to measure degradation level for the watermarked music samples and to examine residual distortion for different parameters of the watermarking algorithm and different music genres.

  9. Enhancing Navigation Skills through Audio Gaming.

    Science.gov (United States)

    Sánchez, Jaime; Sáenz, Mauricio; Pascual-Leone, Alvaro; Merabet, Lotfi

    2010-01-01

    We present the design, development and initial cognitive evaluation of an Audio-based Environment Simulator (AbES). This software allows a blind user to navigate through a virtual representation of a real space for the purposes of training orientation and mobility skills. Our findings indicate that users feel satisfied and self-confident when interacting with the audio-based interface, and the embedded sounds allow them to correctly orient themselves and navigate within the virtual world. Furthermore, users are able to transfer spatial information acquired through virtual interactions into real world navigation and problem solving tasks.

  10. Nonlinear dynamic macromodeling techniques for audio systems

    Science.gov (United States)

    Ogrodzki, Jan; Bieńkowski, Piotr

    2015-09-01

    This paper develops a modelling method and a models identification technique for the nonlinear dynamic audio systems. Identification is performed by means of a behavioral approach based on a polynomial approximation. This approach makes use of Discrete Fourier Transform and Harmonic Balance Method. A model of an audio system is first created and identified and then it is simulated in real time using an algorithm of low computational complexity. The algorithm consists in real time emulation of the system response rather than in simulation of the system itself. The proposed software is written in Python language using object oriented programming techniques. The code is optimized for a multithreads environment.

  11. Teaching English through Mass Media

    Science.gov (United States)

    Tafani, Vilma

    2009-01-01

    This article aims at analyzing the importance of using Mass Media in the classroom and finding the ways how to use Printed and Audio-visual Media. It is the result of an in-depth study, surveys and questionnaires thus trying to make the ideas in this article more trustworthy. It is based not only on the literature review but also on long personal…

  12. Audio wiring guide how to wire the most popular audio and video connectors

    CERN Document Server

    Hechtman, John

    2012-01-01

    Whether you're a pro or an amateur, a musician or into multimedia, you can't afford to guess about audio wiring. The Audio Wiring Guide is a comprehensive, easy-to-use guide that explains exactly what you need to know. No matter the size of your wiring project or installation, this handy tool provides you with the essential information you need and the techniques to use it. Using The Audio Wiring Guide is like having an expert at your side. By following the clear, step-by-step directions, you can do professional-level work at a fraction of the cost.

  13. Managing exam stress using UMTS phones: the advantage of portable audio/video support.

    Science.gov (United States)

    Riva, Giuseppe; Grassi, Alessandra; Villani, Daniela; Gaggioli, Andrea; Preziosa, Alessandra

    2007-01-01

    Test-taking anxiety or stress is very common among university students. It can be very distressing and sometimes debilitating. Exam anxiety involves physical components and emotional components that may be taken into account for managing and reducing anxiety. An approach to control exam anxiety is to learn how to regulate emotions. To help students in managing exam stress we developed a specific protocol based on mobile narratives--multimedia narratives experienced on UMTS/3G phones. 30 female university students (M=23.48; sd=1.24) who were going to perform an exam within a week were included in the trial. They were randomly divided in five groups according to the type and mobility of the medium used: (1) audio only narrative (CD at home); (2) audio only narrative (portable MP3); (3) audio and video narrative (DVD at home); (4) audio and video narrative (UMTS based); (5) control group. Audio/video narratives induced a reduction in exam anxiety in more than 80% of the sample vs 50% of the MP3 sample and 0% of the CD sample. Further, all the users who experienced mobile narratives on UMTS phones were able to relax before the exam, against 50% of DVD users and 33% of audio-only users. The trial showed a better efficacy of mobile narratives experienced on UMTS phones in reducing the level of exam stress and in helping the student to relax. These results suggest that for the specific sample considered--Italian university students--the media used for providing an anti-stress protocol has a clear impact on its efficacy.

  14. Frequency Compensation of an Audio Power Amplifier

    NARCIS (Netherlands)

    van der Zee, Ronan A.R.; van Heeswijk, R.

    2006-01-01

    A car audio power amplifier is presented that uses a frequency compensation scheme which avoids large compensation capacitors around the MOS power transistors, while retaining the bandwidth and stable load range of nested miller compensation. THD is 0.005%@(1kHz, 10W), SNR is 108dB, and the

  15. An ESL Audio-Script Writing Workshop

    Science.gov (United States)

    Miller, Carla

    2012-01-01

    The roles of dialogue, collaborative writing, and authentic communication have been explored as effective strategies in second language writing classrooms. In this article, the stages of an innovative, multi-skill writing method, which embeds students' personal voices into the writing process, are explored. A 10-step ESL Audio Script Writing Model…

  16. Progressive Audio-Lingual Drills in English.

    Science.gov (United States)

    Stieglitz, Francine

    This manual comprises the transcript of the recordings for "Progressive Audio-Lingual Drills in English." These drills are a grammar practice supplement for any basic course in English as a second language. Although intended for use by the instructor, the manual may be used by the student in individual study situations. Work with the recordings…

  17. Consuming audio: an introduction to Tweak Theory

    NARCIS (Netherlands)

    Perlman, Marc

    2014-01-01

    abstractAudio technology is a medium for music, and when we pay attention to it we tend to speculate about its effects on the music it transmits. By now there are well-established traditions of commentary (many of them critical) about the impact of musical reproduction on musical production.

  18. Audible Aliasing Distortion in Digital Audio Synthesis

    Directory of Open Access Journals (Sweden)

    J. Schimmel

    2012-04-01

    Full Text Available This paper deals with aliasing distortion in digital audio signal synthesis of classic periodic waveforms with infinite Fourier series, for electronic musical instruments. When these waveforms are generated in the digital domain then the aliasing appears due to its unlimited bandwidth. There are several techniques for the synthesis of these signals that have been designed to avoid or reduce the aliasing distortion. However, these techniques have high computing demands. One can say that today's computers have enough computing power to use these methods. However, we have to realize that today’s computer-aided music production requires tens of multi-timbre voices generated simultaneously by software synthesizers and the most of the computing power must be reserved for hard-disc recording subsystem and real-time audio processing of many audio channels with a lot of audio effects. Trivially generated classic analog synthesizer waveforms are therefore still effective for sound synthesis. We cannot avoid the aliasing distortion but spectral components produced by the aliasing can be masked with harmonic components and thus made inaudible if sufficient oversampling ratio is used. This paper deals with the assessment of audible aliasing distortion with the help of a psychoacoustic model of simultaneous masking and compares the computing demands of trivial generation using oversampling with those of other methods.

  19. All About Audio Equalization: Solutions and Frontiers

    Directory of Open Access Journals (Sweden)

    Vesa Välimäki

    2016-05-01

    Full Text Available Audio equalization is a vast and active research area. The extent of research means that one often cannot identify the preferred technique for a particular problem. This review paper bridges those gaps, systemically providing a deep understanding of the problems and approaches in audio equalization, their relative merits and applications. Digital signal processing techniques for modifying the spectral balance in audio signals and applications of these techniques are reviewed, ranging from classic equalizers to emerging designs based on new advances in signal processing and machine learning. Emphasis is placed on putting the range of approaches within a common mathematical and conceptual framework. The application areas discussed herein are diverse, and include well-defined, solvable problems of filter design subject to constraints, as well as newly emerging challenges that touch on problems in semantics, perception and human computer interaction. Case studies are given in order to illustrate key concepts and how they are applied in practice. We also recommend preferred signal processing approaches for important audio equalization problems. Finally, we discuss current challenges and the uncharted frontiers in this field. The source code for methods discussed in this paper is made available at https://code.soundsoftware.ac.uk/projects/allaboutaudioeq.

  20. Building Digital Audio Preservation Infrastructure and Workflows

    Science.gov (United States)

    Young, Anjanette; Olivieri, Blynne; Eckler, Karl; Gerontakos, Theodore

    2010-01-01

    In 2009 the University of Washington (UW) Libraries special collections received funding for the digital preservation of its audio indigenous language holdings. The university libraries, where the authors work in various capacities, had begun digitizing image and text collections in 1997. Because of this, at the onset of the project, workflows (a…

  1. Audio Technology and Mobile Human Computer Interaction

    DEFF Research Database (Denmark)

    Chamberlain, Alan; Bødker, Mads; Hazzard, Adrian

    2017-01-01

    Audio-based mobile technology is opening up a range of new interactive possibilities. This paper brings some of those possibilities to light by offering a range of perspectives based in this area. It is not only the technical systems that are developing, but novel approaches to the design and und...

  2. Agency Video, Audio and Imagery Library

    Science.gov (United States)

    Grubbs, Rodney

    2015-01-01

    The purpose of this presentation was to inform the ISS International Partners of the new NASA Agency Video, Audio and Imagery Library (AVAIL) website. AVAIL is a new resource for the public to search for and download NASA-related imagery, and is not intended to replace the current process by which the International Partners receive their Space Station imagery products.

  3. Transparency benchmarking on audio watermarks and steganography

    Science.gov (United States)

    Kraetzer, Christian; Dittmann, Jana; Lang, Andreas

    2006-02-01

    The evaluation of transparency plays an important role in the context of watermarking and steganography algorithms. This paper introduces a general definition of the term transparency in the context of steganography, digital watermarking and attack based evaluation of digital watermarking algorithms. For this purpose the term transparency is first considered individually for each of the three application fields (steganography, digital watermarking and watermarking algorithm evaluation). From the three results a general definition for the overall context is derived in a second step. The relevance and applicability of the definition given is evaluated in practise using existing audio watermarking and steganography algorithms (which work in time, frequency and wavelet domain) as well as an attack based evaluation suite for audio watermarking benchmarking - StirMark for Audio (SMBA). For this purpose selected attacks from the SMBA suite are modified by adding transparency enhancing measures using a psychoacoustic model. The transparency and robustness of the evaluated audio watermarking algorithms by using the original and modifid attacks are compared. The results of this paper show hat transparency benchmarking will lead to new information regarding the algorithms under observation and their usage. This information can result in concrete recommendations for modification, like the ones resulting from the tests performed here.

  4. Efficient audio signal processing for embedded systems

    Science.gov (United States)

    Chiu, Leung Kin

    As mobile platforms continue to pack on more computational power, electronics manufacturers start to differentiate their products by enhancing the audio features. However, consumers also demand smaller devices that could operate for longer time, hence imposing design constraints. In this research, we investigate two design strategies that would allow us to efficiently process audio signals on embedded systems such as mobile phones and portable electronics. In the first strategy, we exploit properties of the human auditory system to process audio signals. We designed a sound enhancement algorithm to make piezoelectric loudspeakers sound ”richer" and "fuller." Piezoelectric speakers have a small form factor but exhibit poor response in the low-frequency region. In the algorithm, we combine psychoacoustic bass extension and dynamic range compression to improve the perceived bass coming out from the tiny speakers. We also developed an audio energy reduction algorithm for loudspeaker power management. The perceptually transparent algorithm extends the battery life of mobile devices and prevents thermal damage in speakers. This method is similar to audio compression algorithms, which encode audio signals in such a ways that the compression artifacts are not easily perceivable. Instead of reducing the storage space, however, we suppress the audio contents that are below the hearing threshold, therefore reducing the signal energy. In the second strategy, we use low-power analog circuits to process the signal before digitizing it. We designed an analog front-end for sound detection and implemented it on a field programmable analog array (FPAA). The system is an example of an analog-to-information converter. The sound classifier front-end can be used in a wide range of applications because programmable floating-gate transistors are employed to store classifier weights. Moreover, we incorporated a feature selection algorithm to simplify the analog front-end. A machine

  5. Extracting meaning from audio signals - a machine learning approach

    DEFF Research Database (Denmark)

    Larsen, Jan

    2007-01-01

    * Machine learning framework for sound search * Genre classification * Music and audio separation * Wind noise suppression......* Machine learning framework for sound search * Genre classification * Music and audio separation * Wind noise suppression...

  6. AUDIO CRYPTANALYSIS- AN APPLICATION OF SYMMETRIC KEY CRYPTOGRAPHY AND AUDIO STEGANOGRAPHY

    National Research Council Canada - National Science Library

    Smita Paira; Sourabh Chandra

    2016-01-01

    .... Steganography is the art that meets one of the basic limitations of Cryptography. In this paper, a new algorithm has been proposed based on both Symmetric Key Cryptography and Audio Steganography...

  7. Predicting the overall spatial quality of automotive audio systems.

    OpenAIRE

    Koya, Daisuke

    2017-01-01

    The spatial quality of automotive audio systems is often compromised due to their unideal listening environments. Automotive audio systems need to be developed quickly due to industry demands. A suitable perceptual model could evaluate the spatial quality of automotive audio systems with similar reliability to formal listening tests but take less time. Such a model is developed in this research project by adapting an existing model of spatial quality for automotive audio use. The requirem...

  8. A high performance switching audio amplifier using sliding mode control

    OpenAIRE

    Pillonnet, Gael; Cellier, Rémy; Abouchi, Nacer; Chiollaz, Monique

    2008-01-01

    International audience; The switching audio amplifiers are widely used in various portable and consumer electronics due to their high efficiency, but suffers from low audio performances due to inherent nonlinearity. This paper presents an integrated class D audio amplifier with low consumption and high audio performances. It includes a power stage and an efficient control based on sliding mode technique. This monolithic class D amplifier is capable of delivering up to 1W into 8Ω load at less ...

  9. Audio Books in the Nigerian Higher Educational System: To be ...

    African Journals Online (AJOL)

    This study discusses audio books from the point of view of an innovation. It discusses the advantages and disadvantages of audio books. It examined students' familiarization with audio books and their perception about its being introduced into the school system. It was found out that Nigerian students are already familiar ...

  10. Enhancement of LSB based Steganography for Hiding Image in Audio

    OpenAIRE

    Pradeep Kumar Singh; R.K.Aggrawal

    2010-01-01

    In this paper we will take an in-depth look on steganography by proposing a new method of Audio Steganography. Emphasize will be on the proposed scheme of image hiding in audio and its comparison with simple Least Significant Bit insertion method for data hiding in audio.

  11. Interfacing Media: User-Centered Design for Media-Rich Web Sites.

    Science.gov (United States)

    Horton, Sarah

    2000-01-01

    Discusses multimedia Web site design that may include images, animations, audio, and video. Highlights include interfaces that stress user-centered design; using only relevant media; placing high-demand content on secondary pages and keeping the home page simpler; providing information about the media; considering users with disabilities; and user…

  12. Migrating Home Computer Audio Waveforms to Digital Objects: A Case Study on Digital Archaeology

    Directory of Open Access Journals (Sweden)

    Mark Guttenbrunner

    2011-03-01

    Full Text Available Rescuing data from inaccessible or damaged storage media for the purpose of preserving the digital data for the long term is one of the dimensions of digital archaeology. With the current pace of technological development, any system can become obsolete in a matter of years and hence the data stored in a specific storage media might not be accessible anymore due to the unavailability of the system to access the media. In order to preserve digital records residing in such storage media, it is necessary to extract the data stored in those media by some means.One early storage medium for home computers in the 1980s was audio tape. The first home computer systems allowed the use of standard cassette players to record and replay data. Audio cassettes are more durable than old home computers when properly stored. Devices playing this medium (i.e. tape recorders can be found in working condition or can be repaired, as they are usually made out of standard components. By re-engineering the format of the waveform and the file formats, the data on such media can then be extracted from a digitised audio stream and migrated to a non-obsolete format.In this paper we present a case study on extracting the data stored on an audio tape by an early home computer system, namely the Philips Videopac+ G7400. The original data formats were re-engineered and an application was written to support the migration of the data stored on tapes without using the original system. This eliminates the necessity of keeping an obsolete system alive for enabling access to the data on the storage media meant for this system. Two different methods to interpret the data and eliminate possible errors in the tape were implemented and evaluated on original tapes, which were recorded 20 years ago. Results show that with some error correction methods, parts of the tapes are still readable even without the original system. It also implies that it is easier to build solutions while original

  13. The Effects of Musical Elements in Mass Media and Internet on the Social Development of Children and Adolescents

    Science.gov (United States)

    Celasin, Cenk

    2013-01-01

    In this qualitative study, musical elements in mass media and internet mostly intended to children and adolescents, were examined in the context of the dimensions of the social development of them in a general approach, through scientific literature and written, audio, visual and audio-visual documents regarding mass media and internet. Purpose of…

  14. Unsupervised topic modelling on South African parliament audio data

    CSIR Research Space (South Africa)

    Kleynhans, N

    2014-11-01

    Full Text Available is as follows: • The audio is extracted from the video recordings of Parliament and sent through the Audio Diariser, which extracts spoken audio and marks the audio with meta- information such as gender and spoken language. • The processed audio... was then repeated by considering the next adjacent segment. The process stop after all segments were compared. 1http://www.transcoding.org/ 2http://sox.sourceforge.net/ • The combined segments were further classified based on gender (male or female), spoken language...

  15. Calibration of an audio frequency noise generator

    DEFF Research Database (Denmark)

    Diamond, Joseph M.

    1966-01-01

    it is used for measurement purposes. The spectral density of a noise source may be found by measuring its rms output over a known noise bandwidth. Such a bandwidth may be provided by a passive filter using accurately known elements. For example, the parallel resonant circuit with purely parallel damping has...... a noise bandwidth Bn = π/2 × (3dB bandwidth). To apply this method to low audio frequencies, the noise bandwidth of the low Q parallel resonant circuit has been found, including the effects of both series and parallel damping. The method has been used to calibrate a General Radio 1390-B noise generator......A noise generator of known output is very convenient in noise measurement. At low audio frequencies, however, all devices, including noise sources, may be affected by excess noise (1/f noise). It is therefore very desirable to be able to check the spectral density of a noise source before...

  16. Audio feature extraction using probability distribution function

    Science.gov (United States)

    Suhaib, A.; Wan, Khairunizam; Aziz, Azri A.; Hazry, D.; Razlan, Zuradzman M.; Shahriman A., B.

    2015-05-01

    Voice recognition has been one of the popular applications in robotic field. It is also known to be recently used for biometric and multimedia information retrieval system. This technology is attained from successive research on audio feature extraction analysis. Probability Distribution Function (PDF) is a statistical method which is usually used as one of the processes in complex feature extraction methods such as GMM and PCA. In this paper, a new method for audio feature extraction is proposed which is by using only PDF as a feature extraction method itself for speech analysis purpose. Certain pre-processing techniques are performed in prior to the proposed feature extraction method. Subsequently, the PDF result values for each frame of sampled voice signals obtained from certain numbers of individuals are plotted. From the experimental results obtained, it can be seen visually from the plotted data that each individuals' voice has comparable PDF values and shapes.

  17. Person tracking using audio and depth cues

    OpenAIRE

    Liu, Q; deCampos, T; Wang, W.; Jackson, P.; Hilton, H.

    2015-01-01

    In this paper, a novel probabilistic Bayesian tracking scheme is proposed and applied to bimodal measurements consisting of tracking results from the depth sensor and audio recordings collected using binaural microphones. We use random finite sets to cope with varying number of tracking targets. A measurement-driven birth process is integrated to quickly localize any emerging person. A new bimodal fusion method that prioritizes the most confident modality is employed. The approach was tested ...

  18. Personalized Audio Systems - a Bayesian Approach

    DEFF Research Database (Denmark)

    Nielsen, Jens Brehm; Jensen, Bjørn Sand; Hansen, Toke Jansen

    2013-01-01

    , the present paper presents a general inter-active framework for personalization of such audio systems. The framework builds on Bayesian Gaussian process regression in which a model of the users's objective function is updated sequentially. The parameter setting to be evaluated in a given trial is selected...... are optimized using the proposed framework. Twelve test subjects obtain a personalized setting with the framework, and these settings are signicantly preferred to those obtained with random experimentation....

  19. Utilization of Nonlinear Converters for Audio Amplification

    OpenAIRE

    Iversen, Niels; Birch, Thomas; Knott, Arnold

    2012-01-01

    Class D ampliers ts the automotive demands quite well. The traditional buck-based amplier has reduced both the cost and size of ampliers. However the buck topology is not without its limitations. The maximum peak AC output voltage produced by the power stage is only equal the supply voltage. The introduction ofnon-linear converters for audio amplication defeats this limitation. A Cuk converter, designed to deliver an AC peak output voltage twice the supply voltage, is presented in this paper....

  20. Digitisation of the CERN Audio Archives

    CERN Multimedia

    Maximilien Brice

    2006-01-01

    Since the creation of CERN in 1954 until mid 1980s, the audiovisual service has recorded hundreds of hours of moments of life at CERN on audio tapes. These moments range from inaugurations of new facilities to VIP speeches and general interest cultural seminars The preservation process started in June 2005 On these pictures, we see Waltraud Hug working on an open-reel tape.

  1. Audio Spatial Representation Around the Body.

    Science.gov (United States)

    Aggius-Vella, Elena; Campus, Claudio; Finocchietti, Sara; Gori, Monica

    2017-01-01

    Studies have found that portions of space around our body are differently coded by our brain. Numerous works have investigated visual and auditory spatial representation, focusing mostly on the spatial representation of stimuli presented at head level, especially in the frontal space. Only few studies have investigated spatial representation around the entire body and its relationship with motor activity. Moreover, it is still not clear whether the space surrounding us is represented as a unitary dimension or whether it is split up into different portions, differently shaped by our senses and motor activity. To clarify these points, we investigated audio localization of dynamic and static sounds at different body levels. In order to understand the role of a motor action in auditory space representation, we asked subjects to localize sounds by pointing with the hand or the foot, or by giving a verbal answer. We found that the audio sound localization was different depending on the body part considered. Moreover, a different pattern of response was observed when subjects were asked to make actions with respect to the verbal responses. These results suggest that the audio space around our body is split in various spatial portions, which are perceived differently: front, back, around chest, and around foot, suggesting that these four areas could be differently modulated by our senses and our actions.

  2. Exploring the Implementation of Steganography Protocols on Quantum Audio Signals

    Science.gov (United States)

    Chen, Kehan; Yan, Fei; Iliyasu, Abdullah M.; Zhao, Jianping

    2018-02-01

    Two quantum audio steganography (QAS) protocols are proposed, each of which manipulates or modifies the least significant qubit (LSQb) of the host quantum audio signal that is encoded as an FRQA (flexible representation of quantum audio) audio content. The first protocol (i.e. the conventional LSQb QAS protocol or simply the cLSQ stego protocol) is built on the exchanges between qubits encoding the quantum audio message and the LSQb of the amplitude information in the host quantum audio samples. In the second protocol, the embedding procedure to realize it implants information from a quantum audio message deep into the constraint-imposed most significant qubit (MSQb) of the host quantum audio samples, we refer to it as the pseudo MSQb QAS protocol or simply the pMSQ stego protocol. The cLSQ stego protocol is designed to guarantee high imperceptibility between the host quantum audio and its stego version, whereas the pMSQ stego protocol ensures that the resulting stego quantum audio signal is better immune to illicit tampering and copyright violations (a.k.a. robustness). Built on the circuit model of quantum computation, the circuit networks to execute the embedding and extraction algorithms of both QAS protocols are determined and simulation-based experiments are conducted to demonstrate their implementation. Outcomes attest that both protocols offer promising trade-offs in terms of imperceptibility and robustness.

  3. Le registrazioni audio dell’archivio Luigi Nono di Venezia

    Directory of Open Access Journals (Sweden)

    Luca Cossettini

    2009-11-01

    Full Text Available The audio recordings of the Luigi Nono Archive in Venice: guidelines for preservation and critical edition of audio documentsStudying audio recordings brings us back to ancient source verification problems that too often one thinks are overcome by the technical reproduction of sound. Au-dio signal is “fixed” on a specific carrier (tape, disc etc with a specific audio format (speed, number of tracks etc; the choice of support and format during the first “memorizing” process and the following copying processes is a subjective and, in case of copying, an interpretative operation conducted within a continuously evolv-ing audio technology. What we listen to today is the result of a transmission process that unavoidably transforms the original acoustic event and the documents that memorize it. Audio recording is no way a timeless and immutable fixing process. It is therefore necessary to study the transmission processes and to reconstruct the au-dio document tradition. The re-recording of the tapes of the Archivio Luigi Nono, conducted by the Audio Labs of the DAMS Musica of the University of Udine, of-fers clear examples of the technical and musicological interpretative problems one can find when he works with audio recordings.

  4. Exploring the Implementation of Steganography Protocols on Quantum Audio Signals

    Science.gov (United States)

    Chen, Kehan; Yan, Fei; Iliyasu, Abdullah M.; Zhao, Jianping

    2017-10-01

    Two quantum audio steganography (QAS) protocols are proposed, each of which manipulates or modifies the least significant qubit (LSQb) of the host quantum audio signal that is encoded as an FRQA (flexible representation of quantum audio) audio content. The first protocol (i.e. the conventional LSQb QAS protocol or simply the cLSQ stego protocol) is built on the exchanges between qubits encoding the quantum audio message and the LSQb of the amplitude information in the host quantum audio samples. In the second protocol, the embedding procedure to realize it implants information from a quantum audio message deep into the constraint-imposed most significant qubit (MSQb) of the host quantum audio samples, we refer to it as the pseudo MSQb QAS protocol or simply the pMSQ stego protocol. The cLSQ stego protocol is designed to guarantee high imperceptibility between the host quantum audio and its stego version, whereas the pMSQ stego protocol ensures that the resulting stego quantum audio signal is better immune to illicit tampering and copyright violations (a.k.a. robustness). Built on the circuit model of quantum computation, the circuit networks to execute the embedding and extraction algorithms of both QAS protocols are determined and simulation-based experiments are conducted to demonstrate their implementation. Outcomes attest that both protocols offer promising trade-offs in terms of imperceptibility and robustness.

  5. Elicitation of attributes for the evaluation of audio-on audio-interference

    DEFF Research Database (Denmark)

    Francombe, Jon; Mason, R.; Dewhirst, M.

    2014-01-01

    An experiment to determine the perceptual attributes of the experience of listening to a target audio program in the presence of an audio interferer was performed. The first stage was a free elicitation task in which a total of 572 phrases were produced. In the second stage, a consensus vocabulary...... procedure was used to reduce these phrases into a comprehensive set of attributes. Groups of experienced and inexperienced listeners determined nine and eight attributes, respectively. These attribute sets were combined by the listeners to produce a final set of 12 attributes: masking, calming, distraction...

  6. Opening the eyes about dictatorship: audio description as a resource of brazilian memory´s maintenance

    Directory of Open Access Journals (Sweden)

    Lucinea Marcelino Villela

    2016-05-01

    Full Text Available In 2014 the Brazilian society had the opportunity to debate the harsh period of its dictatorship after 50 years since the 1964 Military Coup. The main goal of this paper is the presentation of an Audio Description project with remarkable photos and videos from Brazilian Dictatorship and its reflections on Brazilian society. The project was elaborated by the research group “Accessible Media and Audiovisual Translation”, whose main focus is provide accessibility (audio description and subtitles for different audiovisual products. We produced a photo documentary with an overview of some important images and with a script focusing on important information about Brazilian politics from 1964 up to 1989. Many steps were followed during the whole process: selection of photos, historical contextualization, script, narration, final editing of the video. In order to produce the audio description scripts of photos and images selected, we have followed some assumptions about audio description. According to Matamala (2006:330 various competences are required to audio describers such as: “the ability to undertake intersemiotic translations (turning images into words, the ability to summarise information in order to adapt the text to the limited space available, keeping the original meaning, by means of rewording and by using synonyms; the ability to critically select the most relevant information”.

  7. Opening the eyes about dictatorship: audio description as a resource of brazilian memory´s maintenance

    Directory of Open Access Journals (Sweden)

    Lucinea Marcelino Villela

    2016-08-01

    Full Text Available In 2014 the Brazilian society had the opportunity to debate the harsh period of its dictatorship after 50 years since the 1964 Military Coup. The main goal of this paper is the presentation of an Audio Description project with remarkable photos and videos from Brazilian Dictatorship and its reflections on Brazilian society. The project was elaborated by the research group “Accessible Media and Audiovisual Translation”, whose main focus is provide accessibility (audio description and subtitles for different audiovisual products. We produced a photo documentary with an overview of some important images and with a script focusing on important information about Brazilian politics from 1964 up to 1989. Many steps were followed during the whole process: selection of photos, historical contextualization, script, narration, final editing of the video. In order to produce the audio description scripts of photos and images selected, we have followed some assumptions about audio description. According to Matamala (2006:330 various competences are required to audio describers such as: “the ability to undertake intersemiotic translations (turning images into words, the ability to summarise information in order to adapt the text to the limited space available, keeping the original meaning, by means of rewording and by using synonyms; the ability to critically select the most relevant information”.

  8. Non Audio-Video gesture recognition system

    DEFF Research Database (Denmark)

    Craciunescu, Razvan; Mihovska, Albena Dimitrova; Kyriazakos, Sofoklis

    2016-01-01

    Gesture recognition is a topic in computer science and language technology with the goal of interpreting human gestures via mathematical algorithms. Gestures can originate from any bodily motion or state but commonly originate from the face or hand. Current research focus includes on the emotion...... recognition from the face and hand gesture recognition. Gesture recognition enables humans to communicate with the machine and interact naturally without any mechanical devices. This paper investigates the possibility to use non-audio/video sensors in order to design a low-cost gesture recognition device...

  9. Mixing audio concepts, practices and tools

    CERN Document Server

    Izhaki, Roey

    2013-01-01

    Your mix can make or break a record, and mixing is an essential catalyst for a record deal. Professional engineers with exceptional mixing skills can earn vast amounts of money and find that they are in demand by the biggest acts. To develop such skills, you need to master both the art and science of mixing. The new edition of this bestselling book offers all you need to know and put into practice in order to improve your mixes. Covering the entire process --from fundamental concepts to advanced techniques -- and offering a multitude of audio samples, tips and tricks, this boo

  10. Audio marketing v ČR

    OpenAIRE

    Timanov, Vladimir

    2015-01-01

    The aim of the work is processing and evaluation of the investment project. The project implies an establishment of the firm in Czech Republic. The branch of the entrepreneurship is sensory marketing or audio-visual marketing. The essence of this field of the marketing is encouragement of sales through the influence on emotional side of the client. Components of the work are market research, analysis of the competitors in this sphere, and the financial plan. As a result, the work will be stru...

  11. Predistortion of a Bidirectional Cuk Audio Amplifier

    DEFF Research Database (Denmark)

    Birch, Thomas Hagen; Nielsen, Dennis; Knott, Arnold

    2014-01-01

    using predistortion. This paper suggests linearizing a nonlinear bidirectional Cuk audio amplifier using an analog predistortion approach. A prototype power stage was built and results show that a voltage gain of up to 9 dB and reduction in THD from 6% down to 3% was obtainable using this approach.......Some non-linear amplifier topologies are capable of providing a larger voltage gain than one from a DC source, which could make them suitable for various applications. However, the non-linearities introduce a significant amount of harmonic distortion (THD). Some of this distortion could be reduced...

  12. Real-Time Audio Translation Module Between Iax And Rsw

    OpenAIRE

    Hadeel Saleh Haj Aliwi; Putra. Sumari

    2014-01-01

    At the last few years, multimedia communication has been developed and improved rapidly in order to enable users to communicate between each other over the internet. Generally, multimedia communication consists of audio and video communication. However, this research concentrates on audio conferencing only. The audio translation between protocols is a very critical issue, because it solves the communication problems between any two protocols. So, it enables people around the world to talk wit...

  13. Audio-visual perception of new wind parks

    OpenAIRE

    Yu, T.; Behm, H.; Bill, R.; Kang, J.

    2017-01-01

    Previous studies have reported negative impacts of wind parks on the public. These studies considered the noise levels or visual levels separately but not audio-visual interactive factors. This study investigated the audio-visual impact of a new wind park using virtual technology that combined audio and visual features of the environment. Participants were immersed through Google Cardboard in an actual landscape without wind parks (ante operam) and in the same landscape with wind parks (post ...

  14. Performance Improvement of Threshold based Audio Steganography using Parallel Computation

    OpenAIRE

    Muhammad Shoaib; Zakir Khan; Danish Shehzad; Tamer Dag; Arif Iqbal Umar; Noor Ul Amin

    2016-01-01

    Audio steganography is used to hide secret information inside audio signal for the secure and reliable transfer of information. Various steganography techniques have been proposed and implemented to ensure adequate security level. The existing techniques either focus on the payload or security, but none of them has ensured both security and payload at same time. Data Dependency in existing solution was reluctant for the execution of steganography mechanism serially. The audio data and secret ...

  15. Instructional Audio Guidelines: Four Design Principles to Consider for Every Instructional Audio Design Effort

    Science.gov (United States)

    Carter, Curtis W.

    2012-01-01

    This article contends that instructional designers and developers should attend to four particular design principles when creating instructional audio. Support for this view is presented by referencing the limited research that has been done in this area, and by indicating how and why each of the four principles is important to the design process.…

  16. A Model of Distraction in an Audio-on-Audio Interference Situation with Music Program Material

    DEFF Research Database (Denmark)

    Francombe, J.; Mason, R.; Dewhirst, M.

    2015-01-01

    There are many situations in which multiple audio programs are replayed over loudspeakers in the same acoustic environment, allowing listeners to focus on their desired target program. Where this situation is deliberately created and the different program items are centrally controlled, each list...

  17. Quantization and psychoacoustic model in audio coding in advanced audio coding

    Science.gov (United States)

    Brzuchalski, Grzegorz

    2011-10-01

    This paper presents complete optimized architecture of Advanced Audio Coder quantization with Huffman coding. After that psychoacoustic model theory is presented and few algorithms described: standard Two Loop Search, its modifications, Genetic, Just Noticeable Level Difference, Trellis-Based and its modification: Cascaded Trellis-Based Algorithm.

  18. Newnes audio and Hi-Fi engineer's pocket book

    CERN Document Server

    Capel, Vivian

    2013-01-01

    Newnes Audio and Hi-Fi Engineer's Pocket Book, Second Edition provides concise discussion of several audio topics. The book is comprised of 10 chapters that cover different audio equipment. The coverage of the text includes microphones, gramophones, compact discs, and tape recorders. The book also covers high-quality radio, amplifiers, and loudspeakers. The book then reviews the concepts of sound and acoustics, and presents some facts and formulas relevant to audio. The text will be useful to sound engineers and other professionals whose work involves sound systems.

  19. Audio scene segmentation for video with generic content

    Science.gov (United States)

    Niu, Feng; Goela, Naveen; Divakaran, Ajay; Abdel-Mottaleb, Mohamed

    2008-01-01

    In this paper, we present a content-adaptive audio texture based method to segment video into audio scenes. The audio scene is modeled as a semantically consistent chunk of audio data. Our algorithm is based on "semantic audio texture analysis." At first, we train GMM models for basic audio classes such as speech, music, etc. Then we define the semantic audio texture based on those classes. We study and present two types of scene changes, those corresponding to an overall audio texture change and those corresponding to a special "transition marker" used by the content creator, such as a short stretch of music in a sitcom or silence in dramatic content. Unlike prior work using genre specific heuristics, such as some methods presented for detecting commercials, we adaptively find out if such special transition markers are being used and if so, which of the base classes are being used as markers without any prior knowledge about the content. Our experimental results show that our proposed audio scene segmentation works well across a wide variety of broadcast content genres.

  20. Audio-visual assistance in co-creating transition knowledge

    Science.gov (United States)

    Hezel, Bernd; Broschkowski, Ephraim; Kropp, Jürgen P.

    2013-04-01

    Earth system and climate impact research results point to the tremendous ecologic, economic and societal implications of climate change. Specifically people will have to adopt lifestyles that are very different from those they currently strive for in order to mitigate severe changes of our known environment. It will most likely not suffice to transfer the scientific findings into international agreements and appropriate legislation. A transition is rather reliant on pioneers that define new role models, on change agents that mainstream the concept of sufficiency and on narratives that make different futures appealing. In order for the research community to be able to provide sustainable transition pathways that are viable, an integration of the physical constraints and the societal dynamics is needed. Hence the necessary transition knowledge is to be co-created by social and natural science and society. To this end, the Climate Media Factory - in itself a massively transdisciplinary venture - strives to provide an audio-visual connection between the different scientific cultures and a bi-directional link to stake holders and society. Since methodology, particular language and knowledge level of the involved is not the same, we develop new entertaining formats on the basis of a "complexity on demand" approach. They present scientific information in an integrated and entertaining way with different levels of detail that provide entry points to users with different requirements. Two examples shall illustrate the advantages and restrictions of the approach.

  1. Simple Solutions for Space Station Audio Problems

    Science.gov (United States)

    Wood, Eric

    2016-01-01

    Throughout this summer, a number of different projects were supported relating to various NASA programs, including the International Space Station (ISS) and Orion. The primary project that was worked on was designing and testing an acoustic diverter which could be used on the ISS to increase sound pressure levels in Node 1, a module that does not have any Audio Terminal Units (ATUs) inside it. This acoustic diverter is not intended to be a permanent solution to providing audio to Node 1; it is simply intended to improve conditions while more permanent solutions are under development. One of the most exciting aspects of this project is that the acoustic diverter is designed to be 3D printed on the ISS, using the 3D printer that was set up earlier this year. Because of this, no new hardware needs to be sent up to the station, and no extensive hardware testing needs to be performed on the ground before sending it to the station. Instead, the 3D part file can simply be uploaded to the station's 3D printer, where the diverter will be made.

  2. Semantic Labeling of Nonspeech Audio Clips

    Directory of Open Access Journals (Sweden)

    Xiaojuan Ma

    2010-01-01

    Full Text Available Human communication about entities and events is primarily linguistic in nature. While visual representations of information are shown to be highly effective as well, relatively little is known about the communicative power of auditory nonlinguistic representations. We created a collection of short nonlinguistic auditory clips encoding familiar human activities, objects, animals, natural phenomena, machinery, and social scenes. We presented these sounds to a broad spectrum of anonymous human workers using Amazon Mechanical Turk and collected verbal sound labels. We analyzed the human labels in terms of their lexical and semantic properties to ascertain that the audio clips do evoke the information suggested by their pre-defined captions. We then measured the agreement with the semantically compatible labels for each sound clip. Finally, we examined which kinds of entities and events, when captured by nonlinguistic acoustic clips, appear to be well-suited to elicit information for communication, and which ones are less discriminable. Our work is set against the broader goal of creating resources that facilitate communication for people with some types of language loss. Furthermore, our data should prove useful for future research in machine analysis/synthesis of audio, such as computational auditory scene analysis, and annotating/querying large collections of sound effects.

  3. Crafting digital media

    CERN Document Server

    James, Daniel

    2010-01-01

    Open source software, also known as free software, now offers a creative platform with world-class programs. Just ask the people who have completed high-quality projects or developed popular web 2.0 sites using open source desktop applications. This phenomenon is no longer underground or restricted to techies - there have been more than 61 million downloads of the Audacity audio editor and more than 60 million downloads of the GIMP for Windows photographic tool from SourceForge.net alone. Crafting Digital Media is your foundation course in photographic manipulation, illustration, animation, 3D

  4. Teaching English through Mass Media

    Directory of Open Access Journals (Sweden)

    Vilma Tafani

    2009-03-01

    Full Text Available This article aims at analyzing the importance of using Mass Media in the classroom and finding the ways how to use Printed and Audio-visual Media. It is the result of an in-depth study, surveys and questionnaires thus trying to make the ideas in this article more trustworthy. It is based not only on the literature review but also on long personal experience. It is a brief description of some practical examples and some tips for novice teachers. Further more, this article tends to deal with some of the key issues of using media in the classroom. Here are included some of the findings of my research work on a post-doctorate Fulbright Program in 2001. The following issues are open for discussion: the importance of Media in general and in education in particular; Media are persuasive and pervasive, newspapers, magazines, radio, television and internet in the classroom, etc.

  5. Let Their Voices Be Heard! Building a Multicultural Audio Collection.

    Science.gov (United States)

    Tucker, Judith Cook

    1992-01-01

    Discusses building a multicultural audio collection for a library. Gives some guidelines about selecting materials that really represent different cultures. Audio materials that are considered fall roughly into the categories of children's stories, didactic materials, oral histories, poetry and folktales, and music. The goal is an authentic…

  6. DOA Estimation of Audio Sources in Reverberant Environments

    NARCIS (Netherlands)

    Jensen, Jesper Rindom; Nielsen, J.K.; Heusdens, R.; Christensen, M.G.; Dong, Min; Zheng, Thomas Fang

    Reverberation is well-known to have a detrimental impact on many localization methods for audio sources. We address this problem by imposing a model for the early reflections as well as a model for the audio source itself. Using these models, we propose two iterative localization methods that

  7. Multilevel inverter based class D audio amplifier for capacitive transducers

    DEFF Research Database (Denmark)

    Nielsen, Dennis; Knott, Arnold; Andersen, Michael A. E.

    2014-01-01

    The reduced semiconductor voltage stress makes the multilevel inverters especially interesting, when driving capacitive transducers for audio applications. A ± 300 V flying capacitor class D audio amplifier driving a 100 nF load in the midrange region of 0.1-3.5 kHz with Total Harmonic Distortion...

  8. Recent Audio-Visual Materials on the Soviet Union.

    Science.gov (United States)

    Clarke, Edith Campbell

    1981-01-01

    Identifies and describes audio-visual materials (films, filmstrips, and audio cassette tapes) about the Soviet Union which have been produced since 1977. For each entry, information is presented on title, time required, date of release, cost (purchase and rental), and an abstract. (DB)

  9. Content Discovery from Composite Audio : An unsupervised approach

    NARCIS (Netherlands)

    Lu, L.

    2009-01-01

    In this thesis, we developed and assessed a novel robust and unsupervised framework for semantic inference from composite audio signals. We focused on the problem of detecting audio scenes and grouping them into meaningful clusters. Our approach addressed all major steps in a general process of

  10. Using Audio Books to Improve Reading and Academic Performance

    Science.gov (United States)

    Montgomery, Joel R.

    2009-01-01

    This article highlights significant research about what below grade-level reading means in middle school classrooms and suggests a tested approach to improve reading comprehension levels significantly by using audio books. The use of these audio books can improve reading and academic performance for both English language learners (ELLs) and for…

  11. Can audio recording of outpatient consultations improve patient outcome?

    DEFF Research Database (Denmark)

    Wolderslund, Maiken; Kofoed, Poul-Erik; Axboe, Mette

    different departments: Orthopedics, Urology, Internal Medicine and Pediatrics. A total of 5,460 patients will be included from the outpatient clinics. All patients randomized to an intervention group are offered audio recording of their consultation. An Interactive Voice Response platform enables an audio...

  12. Beyond Podcasting: Creative Approaches to Designing Educational Audio

    Science.gov (United States)

    Middleton, Andrew

    2009-01-01

    This paper discusses a university-wide pilot designed to encourage academics to creatively explore learner-centred applications for digital audio. Participation in the pilot was diverse in terms of technical competence, confidence and contextual requirements and there was little prior experience of working with digital audio. Many innovative…

  13. Classifying laughter and speech using audio-visual feature prediction

    NARCIS (Netherlands)

    Petridis, Stavros; Asghar, Ali; Pantic, Maja

    2010-01-01

    In this study, a system that discriminates laughter from speech by modelling the relationship between audio and visual features is presented. The underlying assumption is that this relationship is different between speech and laughter. Neural networks are trained which learn the audio-to-visual and

  14. Automated Speech and Audio Analysis for Semantic Access to Multimedia

    NARCIS (Netherlands)

    Jong, F.M.G. de; Ordelman, R.; Huijbregts, M.

    2006-01-01

    The deployment and integration of audio processing tools can enhance the semantic annotation of multimedia content, and as a consequence, improve the effectiveness of conceptual access tools. This paper overviews the various ways in which automatic speech and audio analysis can contribute to

  15. Introducing VAST: a Video-Audio Streaming Tester

    Directory of Open Access Journals (Sweden)

    Adrian Sterca

    2010-09-01

    Full Text Available We present a testing package aimed at video and audio streaming across best-effort networks like the Internet. VAST is intended to be a testing framework for protocols transporting audio-video streams across IP networks. It offers the simplicity and predictability of deterministic simulators like ns-2 combined with the testing power of real-world experiments.

  16. On the Use of Memory Models in Audio Features

    DEFF Research Database (Denmark)

    Jensen, Karl Kristoffer

    2011-01-01

    Audio feature estimation is potentially improved by including higher- level models. One such model is the Short Term Memory (STM) model. A new paradigm of audio feature estimation is obtained by adding the influence of notes in the STM. These notes are identified when the perceptual spectral flux...

  17. Dynamically-Loaded Hardware Libraries (HLL) Technology for Audio Applications

    DEFF Research Database (Denmark)

    Esposito, A.; Lomuscio, A.; Nunzio, L. Di

    2016-01-01

    , we load on-the-fly the specific processor in the FPGA, and we transfer the execution from the CPU to the FPGA-based accelerator. The proposed architecture provides excellent flexibility with respect to the different audio applications implemented, high quality audio, and an energy efficient solution....

  18. Automated speech and audio analysis for semantic access to multimedia

    NARCIS (Netherlands)

    de Jong, Franciska M.G.; Ordelman, Roeland J.F.; Huijbregts, M.A.H.; Avrithis, Y.; Kompatsiaris, Y.; Staab, S.; O' Connor, N.E.

    2006-01-01

    The deployment and integration of audio processing tools can enhance the semantic annotation of multimedia content, and as a consequence, improve the effectiveness of conceptual access tools. This paper overviews the various ways in which automatic speech and audio analysis can contribute to

  19. Parametric Audio Based Decoder and Music Synthesizer for Mobile Applications

    NARCIS (Netherlands)

    Oomen, A.W.J.; Szczerba, M.Z.; Therssen, D.

    2011-01-01

    This paper reviews parametric audio coders and discusses novel technologies introduced in a low-complexity, low-power consumption audiodecoder and music synthesizer platform developed by the authors. Thedecoder uses parametric coding scheme based on the MPEG-4 Parametric Audio standard. In order to

  20. Decision-Level Fusion for Audio-Visual Laughter Detection

    NARCIS (Netherlands)

    Reuderink, B.; Poel, Mannes; Truong, Khiet Phuong; Poppe, Ronald Walter; Pantic, Maja; Popescu-Belis, Andrei; Stiefelhagen, Rainer

    Laughter is a highly variable signal, which can be caused by a spectrum of emotions. This makes the automatic detection of laugh- ter a challenging, but interesting task. We perform automatic laughter detection using audio-visual data from the AMI Meeting Corpus. Audio- visual laughter detection is

  1. Decision-level fusion for audio-visual laughter detection

    NARCIS (Netherlands)

    Reuderink, B.; Poel, M.; Truong, K.; Poppe, R.; Pantic, M.

    2008-01-01

    Laughter is a highly variable signal, which can be caused by a spectrum of emotions. This makes the automatic detection of laughter a challenging, but interesting task. We perform automatic laughter detection using audio-visual data from the AMI Meeting Corpus. Audio-visual laughter detection is

  2. Improving audio chord transcription by exploiting harmonic and metric knowledge

    NARCIS (Netherlands)

    de Haas, W.B.; Rodrigues Magalhães, J.P.; Wiering, F.

    2012-01-01

    We present a new system for chord transcription from polyphonic musical audio that uses domain-specific knowledge about tonal harmony and metrical position to improve chord transcription performance. Low-level pulse and spectral features are extracted from an audio source using the Vamp plugin

  3. Four-quadrant flyback converter for direct audio power amplification

    DEFF Research Database (Denmark)

    Ljusev, Petar; Andersen, Michael Andreas E.

    2005-01-01

    This paper presents a bidirectional, four-quadrant flyback converter for use in direct audio power amplification. When compared to the standard Class-D switching audio power amplifier with a separate power supply, the proposed four-quadrant flyback converter provides simple solution with better...

  4. Metode Parity Coding Versus Metode Spread Spectrum Pada Audio Steganography

    OpenAIRE

    Saragih, Riko Arlando

    2006-01-01

    Steganography adalah suatu ilmu yang mempelajari cara menyembunyikan informasi rahasia di dalam sebuah pesan. Audio steganography merupakan perkembangan ilmu dari steganography. Audio steganography mempunyai kesulitan yang lebih dibandingkan pada steganography pada gambar atau pada video karena pendengaran manusia lebih peka daripada penglihatan manusia, sehingga pada proses penyisipan data harus dibuat sebaik mungkin agar suara yang telah disisipkan data terdengar sama dengan suara sebelum d...

  5. An Audio Stream Redirector for the Ethernet Speaker

    Science.gov (United States)

    Mandrekar, Ishan; Prevelakis, Vassilis; Turner, David Michael

    2004-01-01

    The authors have developed the "Ethernet Speaker" (ES), a network-enabled single board computer embedded into a conventional audio speaker. Audio streams are transmitted in the local area network using multicast packets, and the ES can select any one of them and play it back. A key requirement for the ES is that it must be capable of playing any…

  6. AUDIO CRYPTANALYSIS- AN APPLICATION OF SYMMETRIC KEY CRYPTOGRAPHY AND AUDIO STEGANOGRAPHY

    Directory of Open Access Journals (Sweden)

    Smita Paira

    2016-09-01

    Full Text Available In the recent trend of network and technology, “Cryptography” and “Steganography” have emerged out as the essential elements of providing network security. Although Cryptography plays a major role in the fabrication and modification of the secret message into an encrypted version yet it has certain drawbacks. Steganography is the art that meets one of the basic limitations of Cryptography. In this paper, a new algorithm has been proposed based on both Symmetric Key Cryptography and Audio Steganography. The combination of a randomly generated Symmetric Key along with LSB technique of Audio Steganography sends a secret message unrecognizable through an insecure medium. The Stego File generated is almost lossless giving a 100 percent recovery of the original message. This paper also presents a detailed experimental analysis of the algorithm with a brief comparison with other existing algorithms and a future scope. The experimental verification and security issues are promising.

  7. High-Order Sparse Linear Predictors for Audio Processing

    DEFF Research Database (Denmark)

    Giacobello, Daniele; van Waterschoot, Toon; Christensen, Mads Græsbøll

    2010-01-01

    of interesting features that make the idea of using it in audio processing not far fetched, e.g., the strong ability of modeling the spectral peaks that play a dominant role in perception. In this paper, we provide some preliminary conjectures and experiments on the use of high-order sparse linear predictors......Linear prediction has generally failed to make a breakthrough in audio processing, as it has done in speech processing. This is mostly due to its poor modeling performance, since an audio signal is usually an ensemble of different sources. Nevertheless, linear prediction comes with a whole set...... in audio processing. These predictors, successfully implemented in modeling the short-term and long-term redundancies present in speech signals, will be used to model tonal audio signals, both monophonic and polyphonic. We will show how the sparse predictors are able to model efficiently the different...

  8. Class D audio amplifiers for high voltage capacitive transducers

    DEFF Research Database (Denmark)

    Nielsen, Dennis

    Audio reproduction systems contains two key components, the amplifier and the loudspeaker. In the last 20 – 30 years the technology of audio amplifiers have performed a fundamental shift of paradigm. Class D audio amplifiers have replaced the linear amplifiers, suffering from the well-known issues...... of high volume, weight, and cost. High efficient class D amplifiers are now widely available offering power densities, that their linear counterparts can not match. Unlike the technology of audio amplifiers, the loudspeaker is still based on the traditional electrodynamic transducer invented by C.W. Rice......-of-the-art for class D audio amplifiers driving the electrodynamic transducer is presented. Chapter 3 gives an introduction to the DEAP transducer as a load in loudspeaker systems. The main purpose being to established the frequency response of the DEAP input impedance, but also investigate the large signal...

  9. Dynamic Bayesian Networks for Audio-Visual Speech Recognition

    Directory of Open Access Journals (Sweden)

    Liang Luhong

    2002-01-01

    Full Text Available The use of visual features in audio-visual speech recognition (AVSR is justified by both the speech generation mechanism, which is essentially bimodal in audio and visual representation, and by the need for features that are invariant to acoustic noise perturbation. As a result, current AVSR systems demonstrate significant accuracy improvements in environments affected by acoustic noise. In this paper, we describe the use of two statistical models for audio-visual integration, the coupled HMM (CHMM and the factorial HMM (FHMM, and compare the performance of these models with the existing models used in speaker dependent audio-visual isolated word recognition. The statistical properties of both the CHMM and FHMM allow to model the state asynchrony of the audio and visual observation sequences while preserving their natural correlation over time. In our experiments, the CHMM performs best overall, outperforming all the existing models and the FHMM.

  10. Setting Up a Multi-Media Classroom: A QuickStart Card.

    Science.gov (United States)

    D'Ignazio, Fred

    1987-01-01

    Describes the international Multi-Media Classrooms Project that involves schools in Alabama and British Columbia, and explains how to set up a multi-media classroom. Types of equipment needed to support video, audio, telecommunications, and desktop publishing projects are explained, and methods to integrate media into the curriculum are suggested.…

  11. Subjective and Objective Assessment of Perceived Audio Quality of Current Digital Audio Broadcasting Systems and Web-Casting Applications

    NARCIS (Netherlands)

    Pocta, P.; Beerends, J.G.

    2015-01-01

    This paper investigates the impact of different audio codecs typically deployed in current digital audio broadcasting (DAB) systems and web-casting applications, which represent a main source of quality impairment in these systems and applications, on the quality perceived by the end user. Both

  12. Horatio Audio-Describes Shakespeare's "Hamlet": Blind and Low-Vision Theatre-Goers Evaluate an Unconventional Audio Description Strategy

    Science.gov (United States)

    Udo, J. P.; Acevedo, B.; Fels, D. I.

    2010-01-01

    Audio description (AD) has been introduced as one solution for providing people who are blind or have low vision with access to live theatre, film and television content. However, there is little research to inform the process, user preferences and presentation style. We present a study of a single live audio-described performance of Hart House…

  13. Music Genre Classification Using MIDI and Audio Features

    Science.gov (United States)

    Cataltepe, Zehra; Yaslan, Yusuf; Sonmez, Abdullah

    2007-12-01

    We report our findings on using MIDI files and audio features from MIDI, separately and combined together, for MIDI music genre classification. We use McKay and Fujinaga's 3-root and 9-leaf genre data set. In order to compute distances between MIDI pieces, we use normalized compression distance (NCD). NCD uses the compressed length of a string as an approximation to its Kolmogorov complexity and has previously been used for music genre and composer clustering. We convert the MIDI pieces to audio and then use the audio features to train different classifiers. MIDI and audio from MIDI classifiers alone achieve much smaller accuracies than those reported by McKay and Fujinaga who used not NCD but a number of domain-based MIDI features for their classification. Combining MIDI and audio from MIDI classifiers improves accuracy and gets closer to, but still worse, accuracies than McKay and Fujinaga's. The best root genre accuracies achieved using MIDI, audio, and combination of them are 0.75, 0.86, and 0.93, respectively, compared to 0.98 of McKay and Fujinaga. Successful classifier combination requires diversity of the base classifiers. We achieve diversity through using certain number of seconds of the MIDI file, different sample rates and sizes for the audio file, and different classification algorithms.

  14. Music Genre Classification Using MIDI and Audio Features

    Directory of Open Access Journals (Sweden)

    Abdullah Sonmez

    2007-01-01

    Full Text Available We report our findings on using MIDI files and audio features from MIDI, separately and combined together, for MIDI music genre classification. We use McKay and Fujinaga's 3-root and 9-leaf genre data set. In order to compute distances between MIDI pieces, we use normalized compression distance (NCD. NCD uses the compressed length of a string as an approximation to its Kolmogorov complexity and has previously been used for music genre and composer clustering. We convert the MIDI pieces to audio and then use the audio features to train different classifiers. MIDI and audio from MIDI classifiers alone achieve much smaller accuracies than those reported by McKay and Fujinaga who used not NCD but a number of domain-based MIDI features for their classification. Combining MIDI and audio from MIDI classifiers improves accuracy and gets closer to, but still worse, accuracies than McKay and Fujinaga's. The best root genre accuracies achieved using MIDI, audio, and combination of them are 0.75, 0.86, and 0.93, respectively, compared to 0.98 of McKay and Fujinaga. Successful classifier combination requires diversity of the base classifiers. We achieve diversity through using certain number of seconds of the MIDI file, different sample rates and sizes for the audio file, and different classification algorithms.

  15. Quality Enhancement of Compressed Audio Based on Statistical Conversion

    Directory of Open Access Journals (Sweden)

    Chris Kyriakakis

    2008-07-01

    Full Text Available Most audio compression formats are based on the idea of low bit rate transparent encoding. As these types of audio signals are starting to migrate from portable players with inexpensive headphones to higher quality home audio systems, it is becoming evident that higher bit rates may be required to maintain transparency. We propose a novel method that enhances low bit rate encoded audio segments by applying multiband audio resynthesis methods in a postprocessing stage. Our algorithm employs the highly flexible Generalized Gaussian mixture model which offers a more accurate representation of audio features than the Gaussian mixture model. A novel residual conversion technique is applied which proves to significantly improve the enhancement performance without excessive overhead. In addition, both cepstral and residual errors are dramatically decreased by a feature-alignment scheme that employs a sorting transformation. Some improvements regarding the quantization step are also described that enable us to further reduce the algorithm overhead. Signal enhancement examples are presented and the results show that the overhead size incurred by the algorithm is a fraction of the uncompressed signal size. Our results show that the resulting audio quality is comparable to that of a standard perceptual codec operating at approximately the same bit rate.

  16. Quality Enhancement of Compressed Audio Based on Statistical Conversion

    Directory of Open Access Journals (Sweden)

    Mouchtaris Athanasios

    2008-01-01

    Full Text Available Most audio compression formats are based on the idea of low bit rate transparent encoding. As these types of audio signals are starting to migrate from portable players with inexpensive headphones to higher quality home audio systems, it is becoming evident that higher bit rates may be required to maintain transparency. We propose a novel method that enhances low bit rate encoded audio segments by applying multiband audio resynthesis methods in a postprocessing stage. Our algorithm employs the highly flexible Generalized Gaussian mixture model which offers a more accurate representation of audio features than the Gaussian mixture model. A novel residual conversion technique is applied which proves to significantly improve the enhancement performance without excessive overhead. In addition, both cepstral and residual errors are dramatically decreased by a feature-alignment scheme that employs a sorting transformation. Some improvements regarding the quantization step are also described that enable us to further reduce the algorithm overhead. Signal enhancement examples are presented and the results show that the overhead size incurred by the algorithm is a fraction of the uncompressed signal size. Our results show that the resulting audio quality is comparable to that of a standard perceptual codec operating at approximately the same bit rate.

  17. How we give personalised audio feedback after summative OSCEs.

    Science.gov (United States)

    Harrison, Christopher J; Molyneux, Adrian J; Blackwell, Sara; Wass, Valerie J

    2015-04-01

    Students often receive little feedback after summative objective structured clinical examinations (OSCEs) to enable them to improve their performance. Electronic audio feedback has shown promise in other educational areas. We investigated the feasibility of electronic audio feedback in OSCEs. An electronic OSCE system was designed, comprising (1) an application for iPads allowing examiners to mark in the key consultation skill domains, provide "tick-box" feedback identifying strengths and difficulties, and record voice feedback; (2) a feedback website giving students the opportunity to view/listen in multiple ways to the feedback. Acceptability of the audio feedback was investigated, using focus groups with students and questionnaires with both examiners and students. 87 (95%) students accessed the examiners' audio comments; 83 (90%) found the comments useful and 63 (68%) reported changing the way they perform a skill as a result of the audio feedback. They valued its highly personalised, relevant nature and found it much more useful than written feedback. Eighty-nine per cent of examiners gave audio feedback to all students on their stations. Although many found the method easy, lack of time was a factor. Electronic audio feedback provides timely, personalised feedback to students after a summative OSCE provided enough time is allocated to the process.

  18. Optimized Audio Classification and Segmentation Algorithm by Using Ensemble Methods

    Directory of Open Access Journals (Sweden)

    Saadia Zahid

    2015-01-01

    Full Text Available Audio segmentation is a basis for multimedia content analysis which is the most important and widely used application nowadays. An optimized audio classification and segmentation algorithm is presented in this paper that segments a superimposed audio stream on the basis of its content into four main audio types: pure-speech, music, environment sound, and silence. An algorithm is proposed that preserves important audio content and reduces the misclassification rate without using large amount of training data, which handles noise and is suitable for use for real-time applications. Noise in an audio stream is segmented out as environment sound. A hybrid classification approach is used, bagged support vector machines (SVMs with artificial neural networks (ANNs. Audio stream is classified, firstly, into speech and nonspeech segment by using bagged support vector machines; nonspeech segment is further classified into music and environment sound by using artificial neural networks and lastly, speech segment is classified into silence and pure-speech segments on the basis of rule-based classifier. Minimum data is used for training classifier; ensemble methods are used for minimizing misclassification rate and approximately 98% accurate segments are obtained. A fast and efficient algorithm is designed that can be used with real-time multimedia applications.

  19. Acoustic Heritage and Audio Creativity: the Creative Application of Sound in the Representation, Understanding and Experience of Past Environments

    Directory of Open Access Journals (Sweden)

    Damian Murphy

    2017-06-01

    Full Text Available Acoustic Heritage is one aspect of archaeoacoustics, and refers more specifically to the quantifiable acoustic properties of buildings, sites and landscapes from our architectural and archaeological past, forming an important aspect of our intangible cultural heritage. Auralisation, the audio equivalent of 3D visualisation, enables these acoustic properties, captured via the process of measurement and survey, or computer-based modelling, to form the basis of an audio reconstruction and presentation of the studied space. This article examines the application of auralisation and audio creativity as a means to explore our acoustic heritage, thereby diversifying and enhancing the toolset available to the digital heritage or humanities researcher. The Open Acoustic Impulse Response (OpenAIR library is an online repository for acoustic impulse response and auralisation data, with a significant part having been gathered from a broad range of heritage sites. The methodology used to gather this acoustic data is discussed, together with the processes used in generating and calibrating a comparable computer model, and how the data generated might be analysed and presented. The creative use of this acoustic data is also considered, in the context of music production, mixed media artwork and audio for gaming. More relevant to digital heritage is how these data can be used to create new experiences of past environments, as information, interpretation, guide or artwork and ultimately help to articulate new research questions and explorations of our acoustic heritage.

  20. On the definition of adapted audio/video profiles for high-quality video calling services over LTE/4G

    Science.gov (United States)

    Ndiaye, Maty; Quinquis, Catherine; Larabi, Mohamed Chaker; Le Lay, Gwenael; Saadane, Hakim; Perrine, Clency

    2014-01-01

    During the last decade, the important advances and widespread availability of mobile technology (operating systems, GPUs, terminal resolution and so on) have encouraged a fast development of voice and video services like video-calling. While multimedia services have largely grown on mobile devices, the generated increase of data consumption is leading to the saturation of mobile networks. In order to provide data with high bit-rates and maintain performance as close as possible to traditional networks, the 3GPP (The 3rd Generation Partnership Project) worked on a high performance standard for mobile called Long Term Evolution (LTE). In this paper, we aim at expressing recommendations related to audio and video media profiles (selection of audio and video codecs, bit-rates, frame-rates, audio and video formats) for a typical video-calling services held over LTE/4G mobile networks. These profiles are defined according to targeted devices (smartphones, tablets), so as to ensure the best possible quality of experience (QoE). Obtained results indicate that for a CIF format (352 x 288 pixels) which is usually used for smartphones, the VP8 codec provides a better image quality than the H.264 codec for low bitrates (from 128 to 384 kbps). However sequences with high motion, H.264 in slow mode is preferred. Regarding audio, better results are globally achieved using wideband codecs offering good quality except for opus codec (at 12.2 kbps).

  1. Current-Driven Switch-Mode Audio Power Amplifiers

    DEFF Research Database (Denmark)

    Knott, Arnold; Buhl, Niels Christian; Andersen, Michael A. E.

    2012-01-01

    The conversion of electrical energy into sound waves by electromechanical transducers is proportional to the current through the coil of the transducer. However virtually all audio power amplifiers provide a controlled voltage through the interface to the transducer. This paper is presenting...... a switch-mode audio power amplifier not only providing controlled current but also being supplied by current. This results in an output filter size reduction by a factor of 6. The implemented prototype shows decent audio performance with THD + N below 0.1 %....

  2. Debugging of Class-D Audio Power Amplifiers

    DEFF Research Database (Denmark)

    Crone, Lasse; Pedersen, Jeppe Arnsdorf; Mønster, Jakob Døllner

    2012-01-01

    Determining and optimizing the performance of a Class-D audio power amplier can be very dicult without knowledge of the use of audio performance measuring equipment and of how the various noise and distortion sources in uence the audio performance. This paper gives an introduction on how to measure...... the performance of the amplier and how to nd the noise and distortion sources and suggests ways to remove them. Throughout the paper measurements of a test amplier are presented along with the relevant theory....

  3. Survey of compressed domain audio features and their expressiveness

    Science.gov (United States)

    Pfeiffer, Silvia; Vincent, Thomas

    2003-01-01

    We give an overview of existing audio analysis approaches in the compressed domain and incorporate them into a coherent formal structure. After examining the kinds of information accessible in an MPEG-1 compressed audio stream, we describe a coherent approach to determine features from them and report on a number of applications they enable. Most of them aim at creating an index to the audio stream by segmenting the stream into temporally coherent regions, which may be classified into pre-specified types of sounds such as music, speech, speakers, animal sounds, sound effects, or silence. Other applications centre around sound recognition such as gender, beat or speech recognition.

  4. Voice activity detection using audio-visual information

    DEFF Research Database (Denmark)

    Petsatodis, Theodore; Pnevmatikakis, Aristodemos; Boukis, Christos

    2009-01-01

    An audio-visual voice activity detector that uses sensors positioned distantly from the speaker is presented. Its constituting unimodal detectors are based on the modeling of the temporal variation of audio and visual features using Hidden Markov Models; their outcomes are fused using a post......-decision scheme. The Mel-Frequency Cepstral Coefficients and the vertical mouth opening are the chosen audio and visual features respectively, both augmented with their first-order derivatives. The proposed system is assessed using far-field recordings from four different speakers and under various levels...

  5. Switching-mode Audio Power Amplifiers with Direct Energy Conversion

    DEFF Research Database (Denmark)

    Ljusev, Petar; Andersen, Michael Andreas E.

    2005-01-01

    This paper presents a new class of switching-mode audio power amplifiers, which are capable of direct energy conversion from the AC mains to the audio output. They represent an ultimate integration of a switching-mode power supply and a Class D audio power amplifier, where the intermediate DC bus...... has been replaced with a high frequency AC link. When compared to the conventional Class D amplifiers with a separate DC power supply, the proposed single conversion stage amplifier provides simple and compact solution with better efficiency and higher level of integration, leading to reduced...

  6. A review of lossless audio compression standards and algorithms

    Science.gov (United States)

    Muin, Fathiah Abdul; Gunawan, Teddy Surya; Kartiwi, Mira; Elsheikh, Elsheikh M. A.

    2017-09-01

    Over the years, lossless audio compression has gained popularity as researchers and businesses has become more aware of the need for better quality and higher storage demand. This paper will analyse various lossless audio coding algorithm and standards that are used and available in the market focusing on Linear Predictive Coding (LPC) specifically due to its popularity and robustness in audio compression, nevertheless other prediction methods are compared to verify this. Advanced representation of LPC such as LSP decomposition techniques are also discussed within this paper.

  7. Musical examination to bridge audio data and sheet music

    Science.gov (United States)

    Pan, Xunyu; Cross, Timothy J.; Xiao, Liangliang; Hei, Xiali

    2015-03-01

    The digitalization of audio is commonly implemented for the purpose of convenient storage and transmission of music and songs in today's digital age. Analyzing digital audio for an insightful look at a specific musical characteristic, however, can be quite challenging for various types of applications. Many existing musical analysis techniques can examine a particular piece of audio data. For example, the frequency of digital sound can be easily read and identified at a specific section in an audio file. Based on this information, we could determine the musical note being played at that instant, but what if you want to see a list of all the notes played in a song? While most existing methods help to provide information about a single piece of the audio data at a time, few of them can analyze the available audio file on a larger scale. The research conducted in this work considers how to further utilize the examination of audio data by storing more information from the original audio file. In practice, we develop a novel musical analysis system Musicians Aid to process musical representation and examination of audio data. Musicians Aid solves the previous problem by storing and analyzing the audio information as it reads it rather than tossing it aside. The system can provide professional musicians with an insightful look at the music they created and advance their understanding of their work. Amateur musicians could also benefit from using it solely for the purpose of obtaining feedback about a song they were attempting to play. By comparing our system's interpretation of traditional sheet music with their own playing, a musician could ensure what they played was correct. More specifically, the system could show them exactly where they went wrong and how to adjust their mistakes. In addition, the application could be extended over the Internet to allow users to play music with one another and then review the audio data they produced. This would be particularly

  8. Aurally Aided Visual Search Performance Comparing Virtual Audio Systems

    DEFF Research Database (Denmark)

    Larsen, Camilla Horne; Lauritsen, David Skødt; Larsen, Jacob Junker

    2014-01-01

    Due to increased computational power, reproducing binaural hearing in real-time applications, through usage of head-related transfer functions (HRTFs), is now possible. This paper addresses the differences in aurally-aided visual search performance between a HRTF enhanced audio system (3D...... with white dots. The results indicate that 3D audio yields faster search latencies than panning audio, especially with larger amounts of distractors. The applications of this research could fit virtual environments such as video games or virtual simulations....

  9. Aurally Aided Visual Search Performance Comparing Virtual Audio Systems

    DEFF Research Database (Denmark)

    Larsen, Camilla Horne; Lauritsen, David Skødt; Larsen, Jacob Junker

    2014-01-01

    Due to increased computational power reproducing binaural hearing in real-time applications, through usage of head-related transfer functions (HRTFs), is now possible. This paper addresses the differences in aurally-aided visual search performance between an HRTF enhanced audio system (3D...... with white dots. The results indicate that 3D audio yields faster search latencies than panning audio, especially with larger amounts of distractors. The applications of this research could fit virtual environments such as video games or virtual simulations....

  10. The Impact of the New Media Laws on the Freedom of Expression in Macedonia

    Directory of Open Access Journals (Sweden)

    Ivan Stefanovski

    2014-09-01

    Full Text Available After a long and tiring process of political bargaining, public debates and negotiations, the Law on Media, and the Law on Audio and Audiovisual Media Services were passed in Parliament. Media experts, media organizations and critical media in Macedonia, insist that new regulations will further diminish freedom of media and freedom of expression in Macedonia. The main goal of the paper will be to measure the effects of the new laws, after six months of their introduction in the legal system. The activities of the Agency for Audio and Audiovisual Media Services and the Macedonian Radio and Television will be closely followed, mostly by examination of the minutes of their meetings, participation on meetings and depicting effects of their ruling. The ultimate goal will be to propose future recommendations for enhancement of the media sphere, and most precisely, the freedom of media and freedom of expression, in Macedonia.

  11. Analysis of musical expression in audio signals

    Science.gov (United States)

    Dixon, Simon

    2003-01-01

    In western art music, composers communicate their work to performers via a standard notation which specificies the musical pitches and relative timings of notes. This notation may also include some higher level information such as variations in the dynamics, tempo and timing. Famous performers are characterised by their expressive interpretation, the ability to convey structural and emotive information within the given framework. The majority of work on audio content analysis focusses on retrieving score-level information; this paper reports on the extraction of parameters describing the performance, a task which requires a much higher degree of accuracy. Two systems are presented: BeatRoot, an off-line beat tracking system which finds the times of musical beats and tracks changes in tempo throughout a performance, and the Performance Worm, a system which provides a real-time visualisation of the two most important expressive dimensions, tempo and dynamics. Both of these systems are being used to process data for a large-scale study of musical expression in classical and romantic piano performance, which uses artificial intelligence (machine learning) techniques to discover fundamental patterns or principles governing expressive performance.

  12. Minimally radiating sources for personal audio.

    Science.gov (United States)

    Elliott, Stephen J; Cheer, Jordan; Murfet, Harry; Holland, Keith R

    2010-10-01

    In order to reduce annoyance from the audio output of personal devices, it is necessary to maintain the sound level at the user position while minimizing the levels elsewhere. If the dark zone, within which the sound is to be minimized, extends over the whole far field of the source, the problem reduces to that of minimizing the radiated sound power while maintaining the pressure level at the user position. It is shown analytically that the optimum two-source array then has a hypercardioid directivity and gives about 7 dB reduction in radiated sound power, compared with a monopole producing the same on-axis pressure. The performance of other linear arrays is studied using monopole simulations for the motivating example of a mobile phone. The trade-off is investigated between the performance in reducing radiated noise, and the electrical power required to drive the array for different numbers of elements. It is shown for both simulations and experiments conducted on a small array of loudspeakers under anechoic conditions, that both two and three element arrays provide a reasonable compromise between these competing requirements. The implementation of the two-source array in a coupled enclosure is also shown to reduce the electrical power requirements.

  13. Audio Arduino - an ALSA (Advanced Linux Sound Architecture) audio driver for FTDI-based Arduinos

    DEFF Research Database (Denmark)

    Dimitrov, Smilen; Serafin, Stefania

    2011-01-01

    be considered to be a system, that encompasses design decisions on both hardware and software levels - that also demand a certain understanding of the architecture of the target PC operating system. This project outlines how an Arduino Duemillanove board (containing a USB interface chip, manufactured by Future...... Technology Devices International Ltd [FTDI] company) can be demonstrated to behave as a full-duplex, mono, 8-bit 44.1 kHz soundcard, through an implementation of: a PC audio driver for ALSA (Advanced Linux Sound Architecture); a matching program for the Arduino's ATmega microcontroller - and nothing more...

  14. Can audio recording improve patients' recall of outpatient consultations?

    DEFF Research Database (Denmark)

    Wolderslund, Maiken; Kofoed, Poul-Erik; Axboe, Mette

    Introduction In order to give patients possibility to listen to their consultation again, we have designed a system which gives the patients access to digital audio recordings of their consultations. An Interactive Voice Response platform enables the audio recording and gives the patients access...... to replay their consultation. The intervention is evaluated in a randomised controlled trial with 5.460 patients in order to determine whether providing patients with digital audio recording of the consultation affects the patients overall perception of their consultation. In addition to this primary...... objective we want to investigate if replay of the consultations improves the patients’ recall of the information given. Methods Interviews are carried out with 40 patients whose consultations have been audio recorded. Patients are divided into two groups, those who have listened to their consultation...

  15. Perancangan Sistem Audio Mobil Berbasiskan Sistem Pakar dan Web

    Directory of Open Access Journals (Sweden)

    Djunaidi Santoso

    2011-12-01

    Full Text Available Designing car audio that fits user’s needs is a fun activity. However, the design often consumes more time and costly since it should be consulted to the experts several times. For easy access to information in designing a car audio system as well as error prevention, an car audio system based on expert system and web is designed for those who do not have sufficient time and expense to consult directly to experts. This system consists of tutorial modules designed using the HyperText Preprocessor (PHP and MySQL as database. This car audio system design is evaluated uses black box testing method which focuses on the functional needs of the application. Tests are performed by providing inputs and produce outputs corresponding to the function of each module. The test results prove the correspondence between input and output, which means that the program meet the initial goals of the design. 

  16. Audio-visual detection benefits in the rat

    National Research Council Canada - National Science Library

    Gleiss, Stephanie; Kayser, Christoph

    2012-01-01

    ... multisensory protocols. We here demonstrate the feasibility of an audio-visual stimulus detection task for rats, in which the animals detect lateralized uni- and multi-sensory stimuli in a two-response forced choice paradigm...

  17. El Digital Audio Tape Recorder. Contra autores y creadores

    Directory of Open Access Journals (Sweden)

    Jun Ono

    2015-01-01

    Full Text Available La llamada "DAT" (abreviatura por "digital audio tape recorder" / grabadora digital de audio ha recibido cobertura durante mucho tiempo en los medios masivos de Japón y otros países, como un producto acústico electrónico nuevo y controversial de la industria japonesa de artefactos electrónicos. ¿Qué ha pasado con el objeto de esta controversia?

  18. Audio visual information fusion for human activity analysis

    OpenAIRE

    Thagadur Shivappa, Shankar

    2010-01-01

    Human activity analysis in unconstrained environments using far-field sensors is a challenging task. The fusion of audio and visual cues enables us to build robust and efficient human activity analysis systems. Traditional fusion schemes including feature-level, classifier-level and decision-level fusion have been explored in task- specific contexts to provide robustness to sensor and environmental noise. However, human activity analysis involves the extraction of information from audio and v...

  19. IELTS speaking instruction through audio/voice conferencing

    Directory of Open Access Journals (Sweden)

    Hamed Ghaemi

    2012-02-01

    Full Text Available The currentstudyaimsatinvestigatingtheimpactofAudio/Voiceconferencing,asanewapproachtoteaching speaking, on the speakingperformanceand/orspeakingband score ofIELTScandidates.Experimentalgroupsubjectsparticipated in an audio conferencing classwhile those of the control group enjoyed attending in a traditional IELTS Speakingclass. At the endofthestudy,allsubjectsparticipatedinanIELTSExaminationheldonNovemberfourthin Tehran,Iran.To compare thegroupmeansforthestudy,anindependentt-testanalysiswasemployed.Thedifferencebetween experimental and control groupwasconsideredtobestatisticallysignificant(P<0.01.Thatisthecandidates in experimental group have outperformed the ones in control group in IELTS Speaking test scores.

  20. Towards Bridging the Gap between Sheet Music and Audio

    OpenAIRE

    Fremerey, Christian; Mueller, Meinard; Clausen, Michael

    2009-01-01

    Sheet music and audio recordings represent and describe music on different semantic levels. Sheet music describes abstract high-level parameters such as notes, keys, measures, or repeats in a visual form. Because of its explicitness and compactness, most musicologists discuss and analyze the meaning of music on the basis of sheet music. On the contrary, most people enjoy music by listening to audio recordings, which represent music in an acoustic form. In particular, the nua...

  1. An Efficient Audio Classification Approach Based on Support Vector Machines

    OpenAIRE

    Lhoucine Bahatti; Omar Bouattane; My Elhoussine Echhibat; Mohamed Hicham Zaggaf

    2016-01-01

    In order to achieve an audio classification aimed to identify the composer, the use of adequate and relevant features is important to improve performance especially when the classification algorithm is based on support vector machines. As opposed to conventional approaches that often use timbral features based on a time-frequency representation of the musical signal using constant window, this paper deals with a new audio classification method which improves the features extraction according ...

  2. Ferrite bead effect on Class-D amplifier audio quality

    OpenAIRE

    Haddad, Kevin El; Mrad, Roberto; Morel, Florent; Pillonnet, Gael; Vollaire, Christian; Nagari, Angelo

    2014-01-01

    International audience; This paper studies the effect of ferrite beads on the audio quality of Class-D audio amplifiers. This latter is a switch-ing circuit which creates high frequency harmonics. Generally, a filter is used at the amplifier output for the sake of electro-magnetic compatibility (EMC). So often, in integrated solutions, this filter contains ferrite beads which are magnetic components and present nonlinear behavior. Time domain measurements and their equivalence in frequency do...

  3. Automated processing of massive audio/video content using FFmpeg

    Directory of Open Access Journals (Sweden)

    Kia Siang Hock

    2014-01-01

    Full Text Available Audio and video content forms an integral, important and expanding part of the digital collections in libraries and archives world-wide. While these memory institutions are familiar and well-versed in the management of more conventional materials such as books, periodicals, ephemera and images, the handling of audio (e.g., oral history recordings and video content (e.g., audio-visual recordings, broadcast content requires additional toolkits. In particular, a robust and comprehensive tool that provides a programmable interface is indispensable when dealing with tens of thousands of hours of audio and video content. FFmpeg is comprehensive and well-established open source software that is capable of the full-range of audio/video processing tasks (such as encode, decode, transcode, mux, demux, stream and filter. It is also capable of handling a wide-range of audio and video formats, a unique challenge in memory institutions. It comes with a command line interface, as well as a set of developer libraries that can be incorporated into applications.

  4. TNO at TRECVID 2008, Combining Audio and Video Fingerprinting for Robust Copy Detection

    NARCIS (Netherlands)

    Doets, P.J.; Eendebak, P.T.; Ranguelova, E.; Kraaij, W.

    2009-01-01

    TNO has evaluated a baseline audio and a video fingerprinting system based on robust hashing for the TRECVID 2008 copy detection task. We participated in the audio, the video and the combined audio-video copy detection task. The audio fingerprinting implementation clearly outperformed the video

  5. Communicative Competence in Audio Classrooms: A Position Paper for the CADE 1991 Conference.

    Science.gov (United States)

    Burge, Liz

    Classroom practitioners need to move their attention away from the technological and logistical competencies required for audio conferencing (AC) to the required communicative competencies in order to advance their skills in handling the psychodynamics of audio virtual classrooms which include audio alone and audio with graphics. While the…

  6. Adaptive Modulation Approach for Robust MPEG-4 AAC Encoded Audio Transmission

    Science.gov (United States)

    2011-11-01

    translates to perceptual audio quality in the range of slightly annoying to annoying as per the ITU-R BS.1387-1 standard [8], [9] shown in Table 1. But in...of Audiovisual Objects,” Part 3: Audio, Subpart 4: General Audio (GA) Coding: AAC/TwinVQ, 2000. [2] Y. Zhang, “Robust audio Coding over Wireless

  7. AUTOMATIC SEGMENTATION OF BROADCAST AUDIO SIGNALS USING AUTO ASSOCIATIVE NEURAL NETWORKS

    Directory of Open Access Journals (Sweden)

    P. Dhanalakshmi

    2010-12-01

    Full Text Available In this paper, we describe automatic segmentation methods for audio broadcast data. Today, digital audio applications are part of our everyday lives. Since there are more and more digital audio databases in place these days, the importance of effective management for audio databases have become prominent. Broadcast audio data is recorded from the Television which comprises of various categories of audio signals. Efficient algorithms for segmenting the audio broadcast data into predefined categories are proposed. Audio features namely Linear prediction coefficients (LPC, Linear prediction cepstral coefficients, and Mel frequency cepstral coefficients (MFCC are extracted to characterize the audio data. Auto Associative Neural Networks are used to segment the audio data into predefined categories using the extracted features. Experimental results indicate that the proposed algorithms can produce satisfactory results.

  8. Eyeblink rate watching classical Hollywood and post-classical MTV editing styles, in media and non-media professionals.

    Science.gov (United States)

    Andreu-Sánchez, Celia; Martín-Pascual, Miguel Ángel; Gruart, Agnès; Delgado-García, José María

    2017-02-21

    While movie edition creates a discontinuity in audio-visual works for narrative and economy-of-storytelling reasons, eyeblink creates a discontinuity in visual perception for protective and cognitive reasons. We were interested in analyzing eyeblink rate linked to cinematographic edition styles. We created three video stimuli with different editing styles and analyzed spontaneous blink rate in participants (N = 40). We were also interested in looking for different perceptive patterns in blink rate related to media professionalization. For that, of our participants, half (n = 20) were media professionals, and the other half were not. According to our results, MTV editing style inhibits eyeblinks more than Hollywood style and one-shot style. More interestingly, we obtained differences in visual perception related to media professionalization: we found that media professionals inhibit eyeblink rate substantially compared with non-media professionals, in any style of audio-visual edition.

  9. Adaptive Multi-Class Audio Classification in Noisy In-Vehicle Environment

    OpenAIRE

    Won, Myounggyu; Alsaadan, Haitham; Eun, Yongsoon

    2017-01-01

    With ever-increasing number of car-mounted electric devices and their complexity, audio classification is increasingly important for the automotive industry as a fundamental tool for human-device interactions. Existing approaches for audio classification, however, fall short as the unique and dynamic audio characteristics of in-vehicle environments are not appropriately taken into account. In this paper, we develop an audio classification system that classifies an audio stream into music, spe...

  10. Digital Audio Radio Broadcast Systems Laboratory Testing Nearly Complete

    Science.gov (United States)

    2005-01-01

    Radio history continues to be made at the NASA Lewis Research Center with the completion of phase one of the digital audio radio (DAR) testing conducted by the Consumer Electronics Group of the Electronic Industries Association. This satellite, satellite/terrestrial, and terrestrial digital technology will open up new audio broadcasting opportunities both domestically and worldwide. It will significantly improve the current quality of amplitude-modulated/frequency-modulated (AM/FM) radio with a new digitally modulated radio signal and will introduce true compact-disc-quality (CD-quality) sound for the first time. Lewis is hosting the laboratory testing of seven proposed digital audio radio systems and modes. Two of the proposed systems operate in two modes each, making a total of nine systems being tested. The nine systems are divided into the following types of transmission: in-band on-channel (IBOC), in-band adjacent-channel (IBAC), and new bands. The laboratory testing was conducted by the Consumer Electronics Group of the Electronic Industries Association. Subjective assessments of the audio recordings for each of the nine systems was conducted by the Communications Research Center in Ottawa, Canada, under contract to the Electronic Industries Association. The Communications Research Center has the only CCIR-qualified (Consultative Committee for International Radio) audio testing facility in North America. The main goals of the U.S. testing process are to (1) provide technical data to the Federal Communication Commission (FCC) so that it can establish a standard for digital audio receivers and transmitters and (2) provide the receiver and transmitter industries with the proper standards upon which to build their equipment. In addition, the data will be forwarded to the International Telecommunications Union to help in the establishment of international standards for digital audio receivers and transmitters, thus allowing U.S. manufacturers to compete in the

  11. Audio Interaction in Computer Mediated Games

    Directory of Open Access Journals (Sweden)

    J. R. Parker

    2008-01-01

    Full Text Available The use of sound in an interactive media environment has not been advanced, as a technology, as far as graphics or artificial intelligence. This discussion will explore the use of sound as a way to influence the player of a computer game, will show ways that a game can use sound as input, and will describe ways that the player can influence sound in a game. The role of sound in computer games will be explored some practical design ideas that can be used to improve the current state of the art will be given.

  12. Talker variability in audio-visual speech perception.

    Science.gov (United States)

    Heald, Shannon L M; Nusbaum, Howard C

    2014-01-01

    A change in talker is a change in the context for the phonetic interpretation of acoustic patterns of speech. Different talkers have different mappings between acoustic patterns and phonetic categories and listeners need to adapt to these differences. Despite this complexity, listeners are adept at comprehending speech in multiple-talker contexts, albeit at a slight but measurable performance cost (e.g., slower recognition). So far, this talker variability cost has been demonstrated only in audio-only speech. Other research in single-talker contexts have shown, however, that when listeners are able to see a talker's face, speech recognition is improved under adverse listening (e.g., noise or distortion) conditions that can increase uncertainty in the mapping between acoustic patterns and phonetic categories. Does seeing a talker's face reduce the cost of word recognition in multiple-talker contexts? We used a speeded word-monitoring task in which listeners make quick judgments about target word recognition in single- and multiple-talker contexts. Results show faster recognition performance in single-talker conditions compared to multiple-talker conditions for both audio-only and audio-visual speech. However, recognition time in a multiple-talker context was slower in the audio-visual condition compared to audio-only condition. These results suggest that seeing a talker's face during speech perception may slow recognition by increasing the importance of talker identification, signaling to the listener a change in talker has occurred.

  13. Audio-video feature correlation: faces and speech

    Science.gov (United States)

    Durand, Gwenael; Montacie, Claude; Caraty, Marie-Jose; Faudemay, Pascal

    1999-08-01

    This paper presents a study of the correlation of features automatically extracted from the audio stream and the video stream of audiovisual documents. In particular, we were interested in finding out whether speech analysis tools could be combined with face detection methods, and to what extend they should be combined. A generic audio signal partitioning algorithm as first used to detect Silence/Noise/Music/Speech segments in a full length movie. A generic object detection method was applied to the keyframes extracted from the movie in order to detect the presence or absence of faces. The correlation between the presence of a face in the keyframes and of the corresponding voice in the audio stream was studied. A third stream, which is the script of the movie, is warped on the speech channel in order to automatically label faces appearing in the keyframes with the name of the corresponding character. We naturally found that extracted audio and video features were related in many cases, and that significant benefits can be obtained from the joint use of audio and video analysis methods.

  14. The Fungible Audio-Visual Mapping and its Experience

    Directory of Open Access Journals (Sweden)

    Adriana Sa

    2014-12-01

    Full Text Available This article draws a perceptual approach to audio-visual mapping. Clearly perceivable cause and effect relationships can be problematic if one desires the audience to experience the music. Indeed perception would bias those sonic qualities that fit previous concepts of causation, subordinating other sonic qualities, which may form the relations between the sounds themselves. The question is, how can an audio-visual mapping produce a sense of causation, and simultaneously confound the actual cause-effect relationships. We call this a fungible audio-visual mapping. Our aim here is to glean its constitution and aspect. We will report a study, which draws upon methods from experimental psychology to inform audio-visual instrument design and composition. The participants are shown several audio-visual mapping prototypes, after which we pose quantitative and qualitative questions regarding their sense of causation, and their sense of understanding the cause-effect relationships. The study shows that a fungible mapping requires both synchronized and seemingly non-related components – sufficient complexity to be confusing. As the specific cause-effect concepts remain inconclusive, the sense of causation embraces the whole. 

  15. Note-accurate audio segmentation based on MPEG-7

    Science.gov (United States)

    Wellhausen, Jens

    2003-12-01

    Segmenting audio data into the smallest musical components is the basis for many further meta data extraction algorithms. For example, an automatic music transcription system needs to know where the exact boundaries of each tone are. In this paper a note accurate audio segmentation algorithm based on MPEG-7 low level descriptors is introduced. For a reliable detection of different notes, both features in the time and the frequency domain are used. Because of this, polyphonic instrument mixes and even melodies characterized by human voices can be examined with this alogrithm. For testing and verification of the note accurate segmentation, a simple music transcription system was implemented. The dominant frequency within each segment is used to build a MIDI file representing the processed audio data.

  16. Technical Evaluation Report 31: Internet Audio Products (3/ 3

    Directory of Open Access Journals (Sweden)

    Jim Rudolph

    2004-08-01

    Full Text Available Two contrasting additions to the online audio market are reviewed: iVocalize, a browser-based audio-conferencing software, and Skype, a PC-to-PC Internet telephone tool. These products are selected for review on the basis of their success in gaining rapid popular attention and usage during 2003-04. The iVocalize review emphasizes the product’s role in the development of a series of successful online audio communities – notably several serving visually impaired users. The Skype review stresses the ease with which the product may be used for simultaneous PC-to-PC communication among up to five users. Editor’s Note: This paper serves as an introduction to reports about online community building, and reviews of online products for disabled persons, in the next ten reports in this series. JPB, Series Ed.

  17. Multi Carrier Modulation Audio Power Amplifier with Programmable Logic

    DEFF Research Database (Denmark)

    Christiansen, Theis; Andersen, Toke Meyer; Knott, Arnold

    2009-01-01

    . Analytically expressions, simulations and measurements result in reduced switching frequency amplitudes using MCM techniques. It is also shown that the Total Harmonic Distortion (THD) tends to be compromised compared to conventional class D amplifiers due to intermodulation products of the switching......While switch-mode audio power amplifiers allow compact implementations and high output power levels due to their high power efficiency, they are very well known for creating electromagnetic interference (EMI) with other electronic equipment. To lower the EMI of switch-mode (class D) audio power...... amplifiers while keeping the performance measures to excellent levels is therefore of high interest. In this paper a class D audio amplifier utilising Multi Carrier Modulation (MCM) will be analysed, and a prototype Master-Slave Multi Carrier Modulated (MS MCM) amplifier has been constructed and measured...

  18. Four-quadrant flyback converter for direct audio power amplification

    Energy Technology Data Exchange (ETDEWEB)

    Ljusev, P.; Andersen, Michael A.E.

    2005-07-01

    This paper presents a bidirectional, four-quadrant yback converter for use in direct audio power amplication. When compared to the standard Class-D switching-mode audio power amplier with separate power supply, the proposed four-quadrant flyback converter provides simple and compact solution with high efciency, higher level of integration, lower component count, less board space and eventually lower cost. Both peak and average current-mode control for use with 4Q flyback power converters are described and compared. Integrated magnetics is presented which simplies the construction of the auxiliary power supplies for control biasing and isolated gate drives. The feasibility of the approach is proven on audio power amplier prototype for subwoofer applications. (au)

  19. Audio-visual active speaker tracking in cluttered indoors environments.

    Science.gov (United States)

    Talantzis, Fotios; Pnevmatikakis, Aristodemos; Constantinides, Anthony G

    2009-02-01

    We propose a system for detecting the active speaker in cluttered and reverberant environments where more than one person speaks and moves. Rather than using only audio information, the system utilizes audiovisual information from multiple acoustic and video sensors that feed separate audio and video tracking modules. The audio module operates using a particle filter (PF) and an information-theoretic framework to provide accurate acoustic source location under reverberant conditions. The video subsystem combines in 3-D a number of 2-D trackers based on a variation of Stauffer's adaptive background algorithm with spatiotemporal adaptation of the learning parameters and a Kalman tracker in a feedback configuration. Extensive experiments show that gains are to be expected when fusion of the separate modalities is performed to detect the active speaker.

  20. Highlight summarization in golf videos using audio signals

    Science.gov (United States)

    Kim, Hyoung-Gook; Kim, Jin Young

    2008-01-01

    In this paper, we present an automatic summarization of highlights in golf videos based on audio information alone without video information. The proposed highlight summarization system is carried out based on semantic audio segmentation and detection on action units from audio signals. Studio speech, field speech, music, and applause are segmented by means of sound classification. Swing is detected by the methods of impulse onset detection. Sounds like swing and applause form a complete action unit, while studio speech and music parts are used to anchor the program structure. With the advantage of highly precise detection of applause, highlights are extracted effectively. Our experimental results obtain high classification precision on 18 golf games. It proves that the proposed system is very effective and computationally efficient to apply the technology to embedded consumer electronic devices.

  1. Say What? The Role of Audio in Multimedia Video

    Science.gov (United States)

    Linder, C. A.; Holmes, R. M.

    2011-12-01

    Audio, including interviews, ambient sounds, and music, is a critical-yet often overlooked-part of an effective multimedia video. In February 2010, Linder joined scientists working on the Global Rivers Observatory Project for two weeks of intensive fieldwork in the Congo River watershed. The team's goal was to learn more about how climate change and deforestation are impacting the river system and coastal ocean. Using stills and video shot with a lightweight digital SLR outfit and audio recorded with a pocket-sized sound recorder, Linder documented the trials and triumphs of working in the heart of Africa. Using excerpts from the six-minute Congo multimedia video, this presentation will illustrate how to record and edit an engaging audio track. Topics include interview technique, collecting ambient sounds, choosing and using music, and editing it all together to educate and entertain the viewer.

  2. Sistema de adquisición y procesamiento de audio

    OpenAIRE

    Pérez Segurado, Rubén

    2015-01-01

    El objetivo de este proyecto es el diseño y la implementación de una plataforma para un sistema de procesamiento de audio. El sistema recibirá una señal de audio analógica desde una fuente de audio, permitirá realizar un tratamiento digital de dicha señal y generará una señal procesada que se enviará a unos altavoces externos. Para la realización del sistema de procesamiento se empleará: - Un dispositivo FPGA de Lattice, modelo MachX02-7000-HE, en la cual estarán todas la...

  3. Audio signal recognition for speech, music, and environmental sounds

    Science.gov (United States)

    Ellis, Daniel P. W.

    2003-10-01

    Human listeners are very good at all kinds of sound detection and identification tasks, from understanding heavily accented speech to noticing a ringing phone underneath music playing at full blast. Efforts to duplicate these abilities on computer have been particularly intense in the area of speech recognition, and it is instructive to review which approaches have proved most powerful, and which major problems still remain. The features and models developed for speech have found applications in other audio recognition tasks, including musical signal analysis, and the problems of analyzing the general ``ambient'' audio that might be encountered by an auditorily endowed robot. This talk will briefly review statistical pattern recognition for audio signals, giving examples in several of these domains. Particular emphasis will be given to common aspects and lessons learned.

  4. Multi Carrier Modulator for Switch-Mode Audio Power Amplifiers

    DEFF Research Database (Denmark)

    Knott, Arnold; Pfaffinger, Gerhard; Andersen, Michael Andreas E.

    2008-01-01

    -mode audio power amplifiers while keeping the performance measures to excellent levels is therefore of high general interest. A modulator utilizing multiple carrier signals to generate a two level pulse train will be shown in this paper. The performance of the modulator will be compared in simulation......While switch-mode audio power amplifiers allow compact implementations and high output power levels due to their high power efficiency, they are very well known for creating electromagnetic interference (EMI) with other electronic equipment, in particular radio receivers. Lowering the EMI of switch...... to existing modulation topologies. The lower EMI as well as the preserved audio performance will be shown in simulation as well as in measurement results on a prototype....

  5. PERAN MEDIA PENDIDIKAN DALAM MENINGKATKAN KEMAMPUAN BAHASA ARAB SISWA MADRASAH

    Directory of Open Access Journals (Sweden)

    Azhari Azhari

    2015-08-01

    Full Text Available Instructional media are used to deliver instructional contents. They can be in the forms of book, tape recorder, cassette, video camera, video recorder, film, photo, picture, graphics, television, and computer. They act as learning sources or physical tools that contained instructional materials to stimulate people to learn. The result of the research done in islamic senior high school, MAN Model Banda Aceh showed that the use of audio media could improve students’ achievement and the ability to write arabic language. Using visual media in writing could improve their achievement in writing as it relies on students’ imagination. Furthermore, from audio visual media, students could have new experience and motivate them to study arabic language.

  6. Audio engineering 101 a beginner's guide to music production

    CERN Document Server

    Dittmar, Tim

    2013-01-01

    Audio Engineering 101 is a real world guide for starting out in the recording industry. If you have the dream, the ideas, the music and the creativity but don't know where to start, then this book is for you!Filled with practical advice on how to navigate the recording world, from an author with first-hand, real-life experience, Audio Engineering 101 will help you succeed in the exciting, but tough and confusing, music industry. Covering all you need to know about the recording process, from the characteristics of sound to a guide to microphones to analog versus digital

  7. Video-assisted segmentation of speech and audio track

    Science.gov (United States)

    Pandit, Medha; Yusoff, Yusseri; Kittler, Josef; Christmas, William J.; Chilton, E. H. S.

    1999-08-01

    Video database research is commonly concerned with the storage and retrieval of visual information invovling sequence segmentation, shot representation and video clip retrieval. In multimedia applications, video sequences are usually accompanied by a sound track. The sound track contains potential cues to aid shot segmentation such as different speakers, background music, singing and distinctive sounds. These different acoustic categories can be modeled to allow for an effective database retrieval. In this paper, we address the problem of automatic segmentation of audio track of multimedia material. This audio based segmentation can be combined with video scene shot detection in order to achieve partitioning of the multimedia material into semantically significant segments.

  8. The Single- and Multichannel Audio Recordings Database (SMARD)

    DEFF Research Database (Denmark)

    Nielsen, Jesper Kjær; Jensen, Jesper Rindom; Jensen, Søren Holdt

    2014-01-01

    A new single- and multichannel audio recordings database (SMARD) is presented in this paper. The database contains recordings from a box-shaped listening room for various loudspeaker and array types. The recordings were made for 48 different configurations of three different loudspeakers and four...... different microphone arrays. In each configuration, 20 different audio segments were played and recorded ranging from simple artificial sounds to polyphonic music. SMARD can be used for testing algorithms developed for numerous application, and we give examples of source localisation results....

  9. Efficiency Optimization in Class-D Audio Amplifiers

    DEFF Research Database (Denmark)

    Yamauchi, Akira; Knott, Arnold; Jørgensen, Ivan Harald Holger

    2015-01-01

    This paper presents a new power efficiency optimization routine for designing Class-D audio amplifiers. The proposed optimization procedure finds design parameters for the power stage and the output filter, and the optimum switching frequency such that the weighted power losses are minimized under...... the given constraints. The optimization routine is applied to minimize the power losses in a 130 W class-D audio amplifier based on consumer behavior investigations, where the amplifier operates at idle and low power levels most of the time. Experimental results demonstrate that the optimization method can...

  10. DOA Estimation of Audio Sources in Reverberant Environments

    DEFF Research Database (Denmark)

    Jensen, Jesper Rindom; Nielsen, Jesper Kjær; Heusdens, Richard

    2016-01-01

    Reverberation is well-known to have a detrimental impact on many localization methods for audio sources. We address this problem by imposing a model for the early reflections as well as a model for the audio source itself. Using these models, we propose two iterative localization methods that est...... bias. Our simulation results show that we can estimate the DOA of the desired signal more accurately with this procedure compared to state-of-theart estimator in both synthetic and real data experiments with reverberation....

  11. Towards a universal representation for audio information retrieval and analysis

    DEFF Research Database (Denmark)

    Jensen, Bjørn Sand; Troelsgaard, Rasmus; Larsen, Jan

    2013-01-01

    A fundamental and general representation of audio and music which integrates multi-modal data sources is important for both application and basic research purposes. In this paper we address this challenge by proposing a multi-modal version of the Latent Dirichlet Allocation model which provides...... a joint latent representation. We evaluate this representation on the Million Song Dataset by integrating three fundamentally different modalities, namely tags, lyrics, and audio features. We show how the resulting representation is aligned with common 'cognitive' variables such as tags, and provide some...

  12. Design of a WAV audio player based on K20

    Directory of Open Access Journals (Sweden)

    Xu Yu

    2016-01-01

    Full Text Available The designed player uses the Freescale Company’s MK20DX128VLH7 as the core control ship, and its hardware platform is equipped with VS1003 audio decoder, OLED display interface, USB interface and SD card slot. The player uses the open source embedded real-time operating system μC/OS-II, Freescale USB Stack V4.1.1 and FATFS, and a graphical user interface is developed to improve the user experience based on CGUI. In general, the designed WAV audio player has a strong applicability and a good practical value.

  13. Cambridge English First 2 audio CDs : authentic examination papers

    CERN Document Server

    2016-01-01

    Four authentic Cambridge English Language Assessment examination papers for the Cambridge English: First (FCE) exam. These examination papers for the Cambridge English: First (FCE) exam provide the most authentic exam preparation available, allowing candidates to familiarise themselves with the content and format of the exam and to practise useful exam techniques. The Audio CDs contain the recorded material to allow thorough preparation for the Listening paper and are designed to be used with the Student's Book. A Student's Book with or without answers and a Student's Book with answers and downloadable Audio are available separately. These tests are also available as Cambridge English: First Tests 5-8 on Testbank.org.uk

  14. Minimizing Crosstalk in Self Oscillating Switch Mode Audio Power Amplifiers

    DEFF Research Database (Denmark)

    Knott, Arnold; Ploug, Rasmus Overgaard

    2012-01-01

    The varying switching frequencies of self oscillating switch mode audio amplifiers have been known to cause interchannel intermodulation disturbances in multi channel configurations. This crosstalk phenomenon has a negative impact on the audio performance. The goal of this paper is to present...... a method to minimize this phenomenon by improving the integrity of the various power distribution systems of the amplifier. The method is then applied to an amplifier built for this investigation. The results show that the crosstalk is suppressed with 30 dB, but is not entirely eliminated...

  15. Optimizing dictionary learning parameters for solving Audio Inpainting problem

    Directory of Open Access Journals (Sweden)

    Václav Mach

    2013-01-01

    Full Text Available Recovering missing or distorted audio signal sam-ples has been recently improved by solving an Audio Inpaintingproblem. This paper aims to connect this problem with K-SVD dictionary learning to improve reconstruction error formissing signal insertion problem. Our aim is to adapt an initialdictionary to the reliable signal to be more accurate in missingsamples estimation. This approach is based on sparse signalsreconstruction and optimization problem. In the paper two staplealgorithms, connection between them and emerging problemsare described. We tried to find optimal parameters for efficientdictionary learning.

  16. Real-Time Transmission and Storage of Video, Audio, and Health Data in Emergency and Home Care Situations

    Directory of Open Access Journals (Sweden)

    Barbieri Ivano

    2007-01-01

    Full Text Available The increase in the availability of bandwidth for wireless links, network integration, and the computational power on fixed and mobile platforms at affordable costs allows nowadays for the handling of audio and video data, their quality making them suitable for medical application. These information streams can support both continuous monitoring and emergency situations. According to this scenario, the authors have developed and implemented the mobile communication system which is described in this paper. The system is based on ITU-T H.323 multimedia terminal recommendation, suitable for real-time data/video/audio and telemedical applications. The audio and video codecs, respectively, H.264 and G723.1, were implemented and optimized in order to obtain high performance on the system target processors. Offline media streaming storage and retrieval functionalities were supported by integrating a relational database in the hospital central system. The system is based on low-cost consumer technologies such as general packet radio service (GPRS and wireless local area network (WLAN or WiFi for lowband data/video transmission. Implementation and testing were carried out for medical emergency and telemedicine application. In this paper, the emergency case study is described.

  17. Real-Time Transmission and Storage of Video, Audio, and Health Data in Emergency and Home Care Situations

    Science.gov (United States)

    Barbieri, Ivano; Lambruschini, Paolo; Raggio, Marco; Stagnaro, Riccardo

    2007-12-01

    The increase in the availability of bandwidth for wireless links, network integration, and the computational power on fixed and mobile platforms at affordable costs allows nowadays for the handling of audio and video data, their quality making them suitable for medical application. These information streams can support both continuous monitoring and emergency situations. According to this scenario, the authors have developed and implemented the mobile communication system which is described in this paper. The system is based on ITU-T H.323 multimedia terminal recommendation, suitable for real-time data/video/audio and telemedical applications. The audio and video codecs, respectively, H.264 and G723.1, were implemented and optimized in order to obtain high performance on the system target processors. Offline media streaming storage and retrieval functionalities were supported by integrating a relational database in the hospital central system. The system is based on low-cost consumer technologies such as general packet radio service (GPRS) and wireless local area network (WLAN or WiFi) for lowband data/video transmission. Implementation and testing were carried out for medical emergency and telemedicine application. In this paper, the emergency case study is described.

  18. Online Class Review: Using Streaming-Media Technology

    Science.gov (United States)

    Loudon, Marc; Sharp, Mark

    2006-01-01

    We present an automated system that allows students to replay both audio and video from a large nonmajors' organic chemistry class as streaming RealMedia. Once established, this system requires no technical intervention and is virtually transparent to the instructor. This gives students access to online class review at any time. Assessment has…

  19. Visuality as a Global Trend in the Mass Media Space

    Directory of Open Access Journals (Sweden)

    Olga V. Shuster

    2013-01-01

    Full Text Available This article describes the current status of Russian media space and the position of the Internet. Significant attention is attached to the consideration of social networks as a field of multilateral and free communication in the Internet. To understand the communication trends, the work examines the percentage of various types of information (text, images, video recordings, audio recordings in social networks.

  20. The Role of Audiovisual Mass Media News in Language Learning

    Science.gov (United States)

    Bahrani, Taher; Sim, Tam Shu

    2011-01-01

    The present paper focuses on the role of audio/visual mass media news in language learning. In this regard, the two important issues regarding the selection and preparation of TV news for language learning are the content of the news and the linguistic difficulty. Content is described as whether the news is specialized or universal. Universal…

  1. Media education.

    Science.gov (United States)

    Strasburger, Victor C

    2010-11-01

    The American Academy of Pediatrics recognizes that exposure to mass media (eg, television, movies, video and computer games, the Internet, music lyrics and videos, newspapers, magazines, books, advertising) presents health risks for children and adolescents but can provide benefits as well. Media education has the potential to reduce the harmful effects of media and accentuate the positive effects. By understanding and supporting media education, pediatricians can play an important role in reducing harmful effects of media on children and adolescents.

  2. Real-Time Audio-Visual Analysis for Multiperson Videoconferencing

    Directory of Open Access Journals (Sweden)

    Petr Motlicek

    2013-01-01

    Full Text Available We describe the design of a system consisting of several state-of-the-art real-time audio and video processing components enabling multimodal stream manipulation (e.g., automatic online editing for multiparty videoconferencing applications in open, unconstrained environments. The underlying algorithms are designed to allow multiple people to enter, interact, and leave the observable scene with no constraints. They comprise continuous localisation of audio objects and its application for spatial audio object coding, detection, and tracking of faces, estimation of head poses and visual focus of attention, detection and localisation of verbal and paralinguistic events, and the association and fusion of these different events. Combined all together, they represent multimodal streams with audio objects and semantic video objects and provide semantic information for stream manipulation systems (like a virtual director. Various experiments have been performed to evaluate the performance of the system. The obtained results demonstrate the effectiveness of the proposed design, the various algorithms, and the benefit of fusing different modalities in this scenario.

  3. Voice Quality Improvement with Error Concealment in Audio Sensor Networks

    NARCIS (Netherlands)

    Türkes, Okan; Baydere, Sebnem

    2012-01-01

    Multi-dimensional properties of audio data and resource-poor nodes make voice processing and transmission a challenging task for Wireless Sensor Networks (WSN). This study analyzes voice quality distortions caused by packet losses occurring over a multi-hop WSN testbed: A comprehensive analysis of

  4. Directions for Change in an Audio-Lingual Approach.

    Science.gov (United States)

    Knop, Constance K.

    2000-01-01

    This article, originally published in 1981 (Canadian Modern Language Review; v37 n4), examines recent research and thinking in the field of second language teaching to find directions and suggestions for change that can be interwoven into an audio-lingual approach. (Author/VWL)

  5. Audio-Described Educational Materials: Ugandan Teachers' Experiences

    Science.gov (United States)

    Wormnaes, Siri; Sellaeg, Nina

    2013-01-01

    This article describes and discusses a qualitative, descriptive, and exploratory study of how 12 visually impaired teachers in Uganda experienced audio-described educational video material for teachers and student teachers. The study is based upon interviews with these teachers and observations while they were using the material either…

  6. Possible technical solutions to reduce energy consumption in audio products

    Energy Technology Data Exchange (ETDEWEB)

    Nielsen, K.; Andersen, M.A.E.

    1999-07-01

    In common audio products nearly all the supplied power is dissipated as heat. The major consumers are with almost no exception the power supply and the audio amplifier. This paper is divided in two parts, concentrating on typical efficiency measures for the concepts of today and the possibly technical solutions, by which the overall efficiency can be considerably improved in the future. Traditional power supplies are made using a transformer operating on the mains frequency followed by a linear regulator. These are bulky and the efficiency is only around 40%. Using high frequency switch mode power supplies the size of the power supply can be reduced and the efficiency can be increased to 80-90%. Construction of optimal amplifiers in regard to total energy consumption over life time, can only be accomplished by considering both the general volume control distribution, and the general spectral amplitude distribution of audio signals. The traditional efficiency measure specified at the maximum efficiency level says only very little about the real energy consumption of the audio amplifier. As an example, the theoretical efficiency for at traditional class B amplifier is 78%. Using a new efficiency measure defined on the basis of the approximate volume control distribution, an 50W amplifier example shows an overall efficiency of only 1%. In the paper possible solutions and guidelines to increase the real amplifier efficiency are given. (au)

  7. Audio-visual perception system for a humanoid robotic head.

    Science.gov (United States)

    Viciana-Abad, Raquel; Marfil, Rebeca; Perez-Lorenzo, Jose M; Bandera, Juan P; Romero-Garces, Adrian; Reche-Lopez, Pedro

    2014-05-28

    One of the main issues within the field of social robotics is to endow robots with the ability to direct attention to people with whom they are interacting. Different approaches follow bio-inspired mechanisms, merging audio and visual cues to localize a person using multiple sensors. However, most of these fusion mechanisms have been used in fixed systems, such as those used in video-conference rooms, and thus, they may incur difficulties when constrained to the sensors with which a robot can be equipped. Besides, within the scope of interactive autonomous robots, there is a lack in terms of evaluating the benefits of audio-visual attention mechanisms, compared to only audio or visual approaches, in real scenarios. Most of the tests conducted have been within controlled environments, at short distances and/or with off-line performance measurements. With the goal of demonstrating the benefit of fusing sensory information with a Bayes inference for interactive robotics, this paper presents a system for localizing a person by processing visual and audio data. Moreover, the performance of this system is evaluated and compared via considering the technical limitations of unimodal systems. The experiments show the promise of the proposed approach for the proactive detection and tracking of speakers in a human-robot interactive framework.

  8. Making Audio-Visual Teaching Materials for Elementary Science

    OpenAIRE

    永田, 四郎

    1980-01-01

    For the elementary science, some audio-visual teaching materials were made by author and our students. These materials are slides for projector, transparencies and materials for OHP, 8 mm sound films and video tapes. We hope this kind of study will continue.

  9. Effect of Audio-Visual Intervention Program on Cognitive ...

    African Journals Online (AJOL)

    Thus the purpose of the study was to study the effectiveness of the audio-visual intervention program on the cognitive development of preschool children in relation to their socio economic status. The researcher employed experimental method to conduct the study. The sample consisted of 100 students from preschool of ...

  10. Turkish Music Genre Classification using Audio and Lyrics Features

    Directory of Open Access Journals (Sweden)

    Önder ÇOBAN

    2017-05-01

    Full Text Available Music Information Retrieval (MIR has become a popular research area in recent years. In this context, researchers have developed music information systems to find solutions for such major problems as automatic playlist creation, hit song detection, and music genre or mood classification. Meta-data information, lyrics, or melodic content of music are used as feature resource in previous works. However, lyrics do not often used in MIR systems and the number of works in this field is not enough especially for Turkish. In this paper, firstly, we have extended our previously created Turkish MIR (TMIR dataset, which comprises of Turkish lyrics, by including the audio file of each song. Secondly, we have investigated the effect of using audio and textual features together or separately on automatic Music Genre Classification (MGC. We have extracted textual features from lyrics using different feature extraction models such as word2vec and traditional Bag of Words. We have conducted our experiments on Support Vector Machine (SVM algorithm and analysed the impact of feature selection and different feature groups on MGC. We have considered lyrics based MGC as a text classification task and also investigated the effect of term weighting method. Experimental results show that textual features can also be effective as well as audio features for Turkish MGC, especially when a supervised term weighting method is employed. We have achieved the highest success rate as 99,12\\% by using both audio and textual features together.

  11. Audio-Visual Perception System for a Humanoid Robotic Head

    Directory of Open Access Journals (Sweden)

    Raquel Viciana-Abad

    2014-05-01

    Full Text Available One of the main issues within the field of social robotics is to endow robots with the ability to direct attention to people with whom they are interacting. Different approaches follow bio-inspired mechanisms, merging audio and visual cues to localize a person using multiple sensors. However, most of these fusion mechanisms have been used in fixed systems, such as those used in video-conference rooms, and thus, they may incur difficulties when constrained to the sensors with which a robot can be equipped. Besides, within the scope of interactive autonomous robots, there is a lack in terms of evaluating the benefits of audio-visual attention mechanisms, compared to only audio or visual approaches, in real scenarios. Most of the tests conducted have been within controlled environments, at short distances and/or with off-line performance measurements. With the goal of demonstrating the benefit of fusing sensory information with a Bayes inference for interactive robotics, this paper presents a system for localizing a person by processing visual and audio data. Moreover, the performance of this system is evaluated and compared via considering the technical limitations of unimodal systems. The experiments show the promise of the proposed approach for the proactive detection and tracking of speakers in a human-robot interactive framework.

  12. Audio-Visual Communications, A Tool for the Professional

    Science.gov (United States)

    Journal of Environmental Health, 1976

    1976-01-01

    The manner in which the Cuyahoga County, Ohio Department of Environmental Health utilizes audio-visual presentations for communication with business and industry, professional public health agencies and the general public is presented. Subjects including food sanitation, radiation protection and safety are described. (BT)

  13. The Timbre Toolbox: extracting audio descriptors from musical signals.

    Science.gov (United States)

    Peeters, Geoffroy; Giordano, Bruno L; Susini, Patrick; Misdariis, Nicolas; McAdams, Stephen

    2011-11-01

    The analysis of musical signals to extract audio descriptors that can potentially characterize their timbre has been disparate and often too focused on a particular small set of sounds. The Timbre Toolbox provides a comprehensive set of descriptors that can be useful in perceptual research, as well as in music information retrieval and machine-learning approaches to content-based retrieval in large sound databases. Sound events are first analyzed in terms of various input representations (short-term Fourier transform, harmonic sinusoidal components, an auditory model based on the equivalent rectangular bandwidth concept, the energy envelope). A large number of audio descriptors are then derived from each of these representations to capture temporal, spectral, spectrotemporal, and energetic properties of the sound events. Some descriptors are global, providing a single value for the whole sound event, whereas others are time-varying. Robust descriptive statistics are used to characterize the time-varying descriptors. To examine the information redundancy across audio descriptors, correlational analysis followed by hierarchical clustering is performed. This analysis suggests ten classes of relatively independent audio descriptors, showing that the Timbre Toolbox is a multidimensional instrument for the measurement of the acoustical structure of complex sound signals.

  14. Audio-Visual Aid in Teaching "Fatty Liver"

    Science.gov (United States)

    Dash, Sambit; Kamath, Ullas; Rao, Guruprasad; Prakash, Jay; Mishra, Snigdha

    2016-01-01

    Use of audio visual tools to aid in medical education is ever on a rise. Our study intends to find the efficacy of a video prepared on "fatty liver," a topic that is often a challenge for pre-clinical teachers, in enhancing cognitive processing and ultimately learning. We prepared a video presentation of 11:36 min, incorporating various…

  15. Current Events and Technology: Video and Audio on the Internet.

    Science.gov (United States)

    Laposata, Matthew M.; Howick, Tom; Dias, Michael J.

    2002-01-01

    Explains the effectiveness of visual aids compared to written materials in teaching and recommends using television segments for teaching purposes. Introduces digitized clips provided by major television news organizations through the Internet and describes the technology requirements for successful viewing of streaming videos and audios. (YDS)

  16. A Comparison of Vocabulary Acquisition in Audio and Video Contexts.

    Science.gov (United States)

    Duquette, Lise; Painchaud, Gisele

    1996-01-01

    Examines the effects of different kinds of rich contexts for vocabulary learning based on second language oral input. The article compares the number and kinds of words learned through exposure to a dialogue or video, or by first listening to an oral account of the dialogue situation and then hearing the audio soundtrack without visual support.…

  17. Influence of Audio-Visual Presentations on Learning Abstract Concepts.

    Science.gov (United States)

    Lai, Shu-Ling

    2000-01-01

    Describes a study of college students that investigated whether various types of visual illustrations influenced abstract concept learning when combined with audio instruction. Discusses results of analysis of variance and pretest posttest scores in relation to learning performance, attitudes toward the computer-based program, and differences in…

  18. The Audio-Visual Marketing Handbook for Independent Schools.

    Science.gov (United States)

    Griffith, Tom

    This how-to booklet offers specific advice on producing video or slide/tape programs for marketing independent schools. Five chapters present guidelines for various stages in the process: (1) Audio-Visual Marketing in Context (aesthetics and economics of audiovisual marketing); (2) A Question of Identity (identifying the audience and deciding on…

  19. A Power Efficient Audio Amplifier Combining Switching and Linear Techniques

    NARCIS (Netherlands)

    van der Zee, Ronan A.R.; van Tuijl, Adrianus Johannes Maria

    1998-01-01

    Integrated Class D audio amplifiers are very power efficient, but require an external filter which prevents further integration. Also due to this filter, large feedback factors are hard to realise, so that the load influences the distortion- and transfer characteristics. The amplifier presented in

  20. Deep learning, audio adversaries, and music content analysis

    DEFF Research Database (Denmark)

    Kereliuk, Corey Mose; Sturm, Bob L.; Larsen, Jan

    2015-01-01

    We present the concept of adversarial audio in the context of deep neural networks (DNNs) for music content analysis. An adversary is an algorithm that makes minor perturbations to an input that cause major repercussions to the system response. In particular, we design an adversary for a DNN...

  1. The relationship between basic audio quality and overall listening experience.

    Science.gov (United States)

    Schoeffler, Michael; Herre, Jürgen

    2016-09-01

    Basic audio quality (BAQ) is a well-known perceptual attribute, which is rated in various listening test methods to measure the performance of audio systems. Unfortunately, when it comes to purchasing audio systems, BAQ might not have a significant influence on the customers' buying decisions since other factors, like brand loyalty, might be more important. In contrast to BAQ, overall listening experience (OLE) is an affective attribute which incorporates all aspects that are important to an individual assessor, including his or her preference for music genre and audio quality. In this work, the relationship between BAQ and OLE is investigated in more detail. To this end, an experiment was carried out, in which participants rated the BAQ and the OLE of music excerpts with different timbral and spatial degradations. In a between-group-design procedure, participants were assigned into two groups, in each of which a different set of stimuli was rated. The results indicate that rating of both attributes, BAQ and OLE, leads to similar rankings, even if a different set of stimuli is rated. In contrast to the BAQ ratings, which were more influenced by timbral than spatial degradations, the OLE ratings were almost equally influenced by timbral and spatial degradations.

  2. Audio-visual materials usage preference among agricultural ...

    African Journals Online (AJOL)

    It was found that respondents preferred radio, television, poster, advert, photographs, specimen, bulletin, magazine, cinema, videotape, chalkboard, and bulletin board as audio-visual materials for extension work. These are the materials that can easily be manipulated and utilized for extension work. Nigerian Journal of ...

  3. Utilizing Domain Knowledge in End-to-End Audio Processing

    DEFF Research Database (Denmark)

    Tax, Tycho; Antich, Jose Luis Diez; Purwins, Hendrik

    2017-01-01

    End-to-end neural network based approaches to audio modelling are generally outperformed by models trained on high-level data representations. In this paper we present preliminary work that shows the feasibility of training the first layers of a deep convolutional neural network (CNN) model...

  4. A listening test system for automotive audio - listeners

    DEFF Research Database (Denmark)

    Choisel, Sylvain; Hegarty, Patrick; Christensen, Flemming

    2007-01-01

    A series of experiments was conducted in order to validate an experimental procedure to perform listening tests on car audio systems in a simulation of the car environment in a laboratory, using binaural synthesis with head-tracking. Seven experts and 40 non-expert listeners rated a range...

  5. Subband coding of digital audio signals without loss of quality

    NARCIS (Netherlands)

    Veldhuis, Raymond N.J.; Breeuwer, Marcel; van de Waal, Robbert

    1989-01-01

    A subband coding system for high quality digital audio signals is described. To achieve low bit rates at a high quality level, it exploits the simultaneous masking effect of the human ear. It is shown how this effect can be used in an adaptive bit-allocation scheme. The proposed approach has been

  6. Overview of the 2015 Workshop on Speech, Language and Audio in Multimedia

    NARCIS (Netherlands)

    Gravier, Guillaume; Jones, Gareth J.F.; Larson, Martha; Ordelman, Roeland J.F.

    2015-01-01

    The Workshop on Speech, Language and Audio in Multimedia (SLAM) positions itself at at the crossroad of multiple scientific fields - music and audio processing, speech processing, natural language processing and multimedia - to discuss and stimulate research results, projects, datasets and

  7. MedlinePlus FAQ: Is audio description available for videos on MedlinePlus?

    Science.gov (United States)

    ... audiodescription.html Question: Is audio description available for videos on MedlinePlus? To use the sharing features on ... page, please enable JavaScript. Answer: Audio description of videos helps make the content of videos accessible to ...

  8. Voice over: Audio-visual congruency and content recall in the gallery setting

    National Research Council Canada - National Science Library

    Merle T Fairhurst; Minnie Scott; Ophelia Deroy

    2017-01-01

    ...? In the present study, we focused on an everyday situation of audio-visual learning and manipulated the relationship between audio guide tracks and viewed portraits in the galleries of the Tate Britain...

  9. 372 Audio Books in the Nigerian Higher Educational System: To be ...

    African Journals Online (AJOL)

    Nekky Umera

    . It discusses the advantages and disadvantages of audio books. It examined students' familiarization with audio books and their perception about its being introduced into the school system. It was found out that Nigerian students are already ...

  10. Audio Signal Processing Using Time-Frequency Approaches: Coding, Classification, Fingerprinting, and Watermarking

    Science.gov (United States)

    Umapathy, K.; Ghoraani, B.; Krishnan, S.

    2010-12-01

    Audio signals are information rich nonstationary signals that play an important role in our day-to-day communication, perception of environment, and entertainment. Due to its non-stationary nature, time- or frequency-only approaches are inadequate in analyzing these signals. A joint time-frequency (TF) approach would be a better choice to efficiently process these signals. In this digital era, compression, intelligent indexing for content-based retrieval, classification, and protection of digital audio content are few of the areas that encapsulate a majority of the audio signal processing applications. In this paper, we present a comprehensive array of TF methodologies that successfully address applications in all of the above mentioned areas. A TF-based audio coding scheme with novel psychoacoustics model, music classification, audio classification of environmental sounds, audio fingerprinting, and audio watermarking will be presented to demonstrate the advantages of using time-frequency approaches in analyzing and extracting information from audio signals.

  11. Audio Signal Processing Using Time-Frequency Approaches: Coding, Classification, Fingerprinting, and Watermarking

    Directory of Open Access Journals (Sweden)

    K. Umapathy

    2010-01-01

    Full Text Available Audio signals are information rich nonstationary signals that play an important role in our day-to-day communication, perception of environment, and entertainment. Due to its non-stationary nature, time- or frequency-only approaches are inadequate in analyzing these signals. A joint time-frequency (TF approach would be a better choice to efficiently process these signals. In this digital era, compression, intelligent indexing for content-based retrieval, classification, and protection of digital audio content are few of the areas that encapsulate a majority of the audio signal processing applications. In this paper, we present a comprehensive array of TF methodologies that successfully address applications in all of the above mentioned areas. A TF-based audio coding scheme with novel psychoacoustics model, music classification, audio classification of environmental sounds, audio fingerprinting, and audio watermarking will be presented to demonstrate the advantages of using time-frequency approaches in analyzing and extracting information from audio signals.

  12. Audio-Visual Speaker Diarization Based on Spatiotemporal Bayesian Fusion.

    Science.gov (United States)

    Gebru, Israel; Ba, Sileye; Li, Xiaofei; Horaud, Radu

    2017-01-05

    Speaker diarization consists of assigning speech signals to people engaged in a dialogue. An audio-visual spatiotemporal diarization model is proposed. The model is well suited for challenging scenarios that consist of several participants engaged in multi-party interaction while they move around and turn their heads towards the other participants rather than facing the cameras and the microphones. Multiple-person visual tracking is combined with multiple speech-source localization in order to tackle the speech-to-person association problem. The latter is solved within a novel audio-visual fusion method on the following grounds: binaural spectral features are first extracted from a microphone pair, then a supervised audio-visual alignment technique maps these features onto an image, and finally a semisupervised clustering method assigns binaural spectral features to visible persons. The main advantage of this method over previous work is that it processes in a principled way speech signals uttered simultaneously by multiple persons. The diarization itself is cast into a latent-variable temporal graphical model that infers speaker identities and speech turns, based on the output of an audio-visual association process, executed at each time slice, and on the dynamics of the diarization variable itself. The proposed formulation yields an efficient exact inference procedure. A novel dataset, that contains audio-visual training data as well as a number of scenarios involving several participants engaged in formal and informal dialogue, is introduced. The proposed method is thoroughly tested and benchmarked with respect to several state-of-the art diarization algorithms.

  13. Interactions audio-tactiles et perception de la parole : Comparaisons entre sujets aveugles et voyants

    OpenAIRE

    Cavé, Christian; Sato, Marc; Ménard, Lucie; Brasseur, Annie

    2010-01-01

    International audience; The present study investigated whether manual tactile information from a speaker's face modulates the decoding of speech when audio-tactile perception is compared with audio-only perception. Two groups of congenitally blind and sighted adults were compared. Participants performed a syllable decision task across three conditions: audio-only and congruent/incongruent audio-tactile conditions. For the auditory modality, the syllables were presented in a background white n...

  14. Effects of reproduction equipment on interaction with a spatial audio interface

    OpenAIRE

    Marentakis, G.; Brewster, S.A.

    2005-01-01

    Spatial audio displays have been criticized because the use of headphones may isolate users from their real world audio environment. In this paper we study the effects of three types of audio reproduction equipment (standard headphones, bone-conductance headphones and monaural presentation using a single earphone) on time and accuracy during interaction with a deictic spatial audio display. Participants selected a target sound emitting from one of four different locations in the presence of d...

  15. Deutsch Durch Audio-Visuelle Methode: An Audio-Lingual-Oral Approach to the Teaching of German.

    Science.gov (United States)

    Dickinson Public Schools, ND. Instructional Media Center.

    This teaching guide, designed to accompany Chilton's "Deutsch Durch Audio-Visuelle Methode" for German 1 and 2 in a three-year secondary school program, focuses major attention on the operational plan of the program and a student orientation unit. A section on teaching a unit discusses four phases: (1) presentation, (2) explanation, (3)…

  16. Planning Schools for Use of Audio-Visual Materials. No. 3: The Audio-Visual Materials Center.

    Science.gov (United States)

    National Education Association, Washington, DC. Dept. of Audiovisual Instruction.

    This manual discusses the role, organizational patterns, expected services, and space and housing needs of the audio-visual instructional materials center. In considering the housing of basic functions, photographs, floor layouts, diagrams, and specifications of equipment are presented. An appendix includes a 77-item bibliography, a 7-page list of…

  17. Audio-visual onset differences are used to determine syllable identity for ambiguous audio-visual stimulus pairs

    NARCIS (Netherlands)

    Ten Oever, Sanne; Sack, Alexander T; Wheat, Katherine L; Bien, Nina; van Atteveldt, Nienke

    2013-01-01

    Content and temporal cues have been shown to interact during audio-visual (AV) speech identification. Typically, the most reliable unimodal cue is used more strongly to identify specific speech features; however, visual cues are only used if the AV stimuli are presented within a certain temporal

  18. Interactive 3D audio: Enhancing awareness of details in immersive soundscapes?

    DEFF Research Database (Denmark)

    Schmidt, Mikkel Nørgaard; Schwartz, Stephen; Larsen, Jan

    2012-01-01

    Spatial audio and the possibility of interacting with the audio environment is thought to increase listeners' attention to details in a soundscape. This work examines if interactive 3D audio enhances listeners' ability to recall details in a soundscape. Nine different soundscapes were constructed...

  19. 77 FR 16890 - Second Meeting: RTCA Special Committee 226, Audio Systems and Equipment

    Science.gov (United States)

    2012-03-22

    ... Federal Aviation Administration Second Meeting: RTCA Special Committee 226, Audio Systems and Equipment... meeting RTCA Special Committee 226, Audio Systems and Equipment. SUMMARY: The FAA is issuing this notice to advise the public of the second meeting of RTCA Special Committee 226, Audio Systems and Equipment...

  20. 76 FR 79755 - First Meeting: RTCA Special Committee 226 Audio Systems and Equipment

    Science.gov (United States)

    2011-12-22

    ... Federal Aviation Administration First Meeting: RTCA Special Committee 226 Audio Systems and Equipment... RTCA Special Committee 226, Audio Systems and Equipment. SUMMARY: The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 226, Audio Systems and Equipment, for the first...

  1. Real-Time Audio Processing on the T-CREST Multicore Platform

    DEFF Research Database (Denmark)

    Ausin, Daniel Sanz; Pezzarossa, Luca; Schoeberl, Martin

    2017-01-01

    of the audio signal. This paper presents a real-time multicore audio processing system based on the T-CREST platform. T-CREST is a time-predictable multicore processor for real-time embedded systems. Multiple audio effect tasks have been implemented, which can be connected together in different configurations...

  2. Responding Effectively to Composition Students: Comparing Student Perceptions of Written and Audio Feedback

    Science.gov (United States)

    Bilbro, J.; Iluzada, C.; Clark, D. E.

    2013-01-01

    The authors compared student perceptions of audio and written feedback in order to assess what types of students may benefit from receiving audio feedback on their essays rather than written feedback. Many instructors previously have reported the advantages they see in audio feedback, but little quantitative research has been done on how the…

  3. Media Komunitas dan Media Literacy

    Directory of Open Access Journals (Sweden)

    Pawito .

    2013-12-01

    Full Text Available Abstract:This essay deals with community media in relation to media literacy. After a short discussion on a number of community media characters is made the essay goes further with somewhat detail theoretical presumptions of the roles of media community with respect primarily to the development as Amartya Sen mentioned about. The author suggests that community media may play some significant roles in the development including (a disseminating information (from varieties of perspective, (b facilitating public discussion, (c helping to reach solutions of problems, (d encouraging participations, and (e encouraging the development of media literacy. Regarding the last point the author remarks that media community may have a dual-roles i.e facilitating community’s member in media participation and facilitating community’s member in media education.

  4. A System for the Semantic Multimodal Analysis of News Audio-Visual Content

    Directory of Open Access Journals (Sweden)

    Michael G. Strintzis

    2010-01-01

    Full Text Available News-related content is nowadays among the most popular types of content for users in everyday applications. Although the generation and distribution of news content has become commonplace, due to the availability of inexpensive media capturing devices and the development of media sharing services targeting both professional and user-generated news content, the automatic analysis and annotation that is required for supporting intelligent search and delivery of this content remains an open issue. In this paper, a complete architecture for knowledge-assisted multimodal analysis of news-related multimedia content is presented, along with its constituent components. The proposed analysis architecture employs state-of-the-art methods for the analysis of each individual modality (visual, audio, text separately and proposes a novel fusion technique based on the particular characteristics of news-related content for the combination of the individual modality analysis results. Experimental results on news broadcast video illustrate the usefulness of the proposed techniques in the automatic generation of semantic annotations.

  5. Media, Gadgets.

    Science.gov (United States)

    Journal of Chemical Education, 1981

    1981-01-01

    Summarizes papers presented at the Sixth Biennial Conference on Chemical Education describing new media and gadgets, particularly models, computers, and other media. A bibliography of 15 presented papers on these topics is attached. (CS)

  6. Analisis Pengembangan Media Pembelajaran Pengolah Angka (Spreadsheet Berbasis Video Screencast

    Directory of Open Access Journals (Sweden)

    Muhammad Munir

    2013-09-01

    Full Text Available The objectives of this study were to develop Screencast-based learning media for the course of spreadsheets  and to investigate its performance. This study utilised research and development approach that consists of: (1 Preparation that includes preparing the tools and materials (2 Recording that includes selecting an area of captures, recording mode screencast, and audio settings on the recording device, (3 Editing that includes adding drawing and callouts elements, editing the timeline, adding zooming effects, animation effects, and audio supports for the introduction, backsound, and narration, (4 Publishing that includes publishing the edited video into a single unit, converting the video format into mp4 with the format factory, (5 Finishing that includes making quizzes then merging the videos and quizzes into united media with the.exe extension. The performance of the media video has achieved the determined plan. When it is run, auto play menu appears to select the screencast.exe.

  7. “Wrapping” X3DOM around Web Audio API

    Directory of Open Access Journals (Sweden)

    Andreas Stamoulias

    2015-12-01

    Full Text Available Spatial sound has a conceptual role in the Web3D environments, due to highly realism scenes that can provide. Lately the efforts are concentrated on the extension of the X3D/ X3DOM through spatial sound attributes. This paper presents a novel method for the introduction of spatial sound components in the X3DOM framework, based on X3D specification and Web Audio API. The proposed method incorporates the introduction of enhanced sound nodes for X3DOM which are derived by the implementation of the X3D standard components, enriched with accessional features of Web Audio API. Moreover, several examples-scenarios developed for the evaluation of our approach. The implemented examples established the achievability of new registered nodes in X3DOM, for spatial sound characteristics in Web3D virtual worlds.

  8. Audio-Vestibular Findings in Increased Intracranial Hypertension Syndrome.

    Science.gov (United States)

    Çoban, Kübra; Aydın, Erdinç; Özlüoğlu, Levent Naci

    2017-04-01

    Idiopathic intracranial hypertension (IIH) can be manifested by audiological and vestibular complaints. The aim of the present study is to determine the audio-vestibular pathologies and their pathophysiologies in this syndrome by performing current audio-vestibular tests. The study was performed prospectively on 40 individuals (20 IIH patients, 20 healthy volunteers). Pure tone audiometry, tympanometry, vestibular evoked myogenic potentials, and electronystagmography tests were performed in both groups and the results were compared. The mean age of both groups was found to be 30.2±18.7. There were 11 females and 9 males in each group. The study group patients had significantly worse hearing levels. Pure tone averages were significantly higher in both ears of the study group (pintracranial pressure may affect the inner ear with similar mechanisms as in hydrops.

  9. Audio teleconferencing: creative use of a forgotten innovation.

    Science.gov (United States)

    Mather, Carey; Marlow, Annette

    2012-06-01

    As part of a regional School of Nursing and Midwifery's commitment to addressing recruitment and retention issues, approximately 90% of second year undergraduate student nurses undertake clinical placements at: multipurpose centres; regional or district hospitals; aged care; or community centres based in rural and remote regions within the State. The remaining 10% undertake professional experience placement in urban areas only. This placement of a large cohort of students, in low numbers in a variety of clinical settings, initiated the need to provide consistent support to both students and staff at these facilities. Subsequently the development of an audio teleconferencing model of clinical facilitation to guide student teaching and learning and to provide support to registered nurse preceptors in clinical practice was developed. This paper draws on Weimer's 'Personal Accounts of Change' approach to describe, discuss and evaluate the modifications that have occurred since the inception of this audio teleconferencing model (Weimer, 2006).

  10. Underdetermined Blind Audio Source Separation Using Modal Decomposition

    Directory of Open Access Journals (Sweden)

    Aïssa-El-Bey Abdeldjalil

    2007-01-01

    Full Text Available This paper introduces new algorithms for the blind separation of audio sources using modal decomposition. Indeed, audio signals and, in particular, musical signals can be well approximated by a sum of damped sinusoidal (modal components. Based on this representation, we propose a two-step approach consisting of a signal analysis (extraction of the modal components followed by a signal synthesis (grouping of the components belonging to the same source using vector clustering. For the signal analysis, two existing algorithms are considered and compared: namely the EMD (empirical mode decomposition algorithm and a parametric estimation algorithm using ESPRIT technique. A major advantage of the proposed method resides in its validity for both instantaneous and convolutive mixtures and its ability to separate more sources than sensors. Simulation results are given to compare and assess the performance of the proposed algorithms.

  11. Underdetermined Blind Audio Source Separation Using Modal Decomposition

    Directory of Open Access Journals (Sweden)

    Abdeldjalil Aïssa-El-Bey

    2007-03-01

    Full Text Available This paper introduces new algorithms for the blind separation of audio sources using modal decomposition. Indeed, audio signals and, in particular, musical signals can be well approximated by a sum of damped sinusoidal (modal components. Based on this representation, we propose a two-step approach consisting of a signal analysis (extraction of the modal components followed by a signal synthesis (grouping of the components belonging to the same source using vector clustering. For the signal analysis, two existing algorithms are considered and compared: namely the EMD (empirical mode decomposition algorithm and a parametric estimation algorithm using ESPRIT technique. A major advantage of the proposed method resides in its validity for both instantaneous and convolutive mixtures and its ability to separate more sources than sensors. Simulation results are given to compare and assess the performance of the proposed algorithms.

  12. Random Numbers Generated from Audio and Video Sources

    Directory of Open Access Journals (Sweden)

    I-Te Chen

    2013-01-01

    Full Text Available Random numbers are very useful in simulation, chaos theory, game theory, information theory, pattern recognition, probability theory, quantum mechanics, statistics, and statistical mechanics. The random numbers are especially helpful in cryptography. In this work, the proposed random number generators come from white noise of audio and video (A/V sources which are extracted from high-resolution IPCAM, WEBCAM, and MPEG-1 video files. The proposed generator applied on video sources from IPCAM and WEBCAM with microphone would be the true random number generator and the pseudorandom number generator when applied on video sources from MPEG-1 video file. In addition, when applying NIST SP 800-22 Rev.1a 15 statistics tests on the random numbers generated from the proposed generator, around 98% random numbers can pass 15 statistical tests. Furthermore, the audio and video sources can be found easily; hence, the proposed generator is a qualified, convenient, and efficient random number generator.

  13. Using content models to build audio-video summaries

    Science.gov (United States)

    Saarela, Janne; Merialdo, Bernard

    1998-12-01

    The amount of digitized video in archives is becoming so huge, that easier access and content browsing tools are desperately needed. Also, video is no longer one big piece of data, but a collection of useful smaller building blocks, which can be accessed and used independently from the original context of presentation. In this paper, we demonstrate a content model for audio video sequences, with the purpose of enabling the automatic generation of video summaries. The model is based on descriptors, which indicate various properties and relations of audio and video segments. In practice, these descriptors could either be generated automatically by methods of analysis, or produced manually (or computer-assisted) by the content provider. We analyze the requirements and characteristics of the different data segments, with respect to the problem of summarization, and we define our model as a set of constraints, which allow to produce good quality summaries.

  14. Audio Quality Assurance : An Application of Cross Correlation

    DEFF Research Database (Denmark)

    Jurik, Bolette Ammitzbøll; Nielsen, Jesper Asbjørn Sindahl

    2012-01-01

    We describe algorithms for automated quality assurance on content of audio files in context of preservation actions and access. The algorithms use cross correlation to compare the sound waves. They are used to do overlap analysis in an access scenario, where preserved radio broadcasts are used...... in research and annotated. They have been applied in a migration scenario, where radio broadcasts are to be migrated for long term preservation....

  15. Investigating Electrophysiology for Measuring Emotions Triggered by Audio Stimuli

    OpenAIRE

    Mazza, Filippo; Perreira Da Silva, Matthieu; Le Callet, Patrick

    2013-01-01

    International audience; Multimedia quality evaluation recently started to take into account also analysis of emotional response to audio- visual stimuli. This is especially true for quality of experience evaluation. Self-assessed affective reports are commonly used for this purpose. Nevertheless, measuring emotions via physiological measurement might be also considered as it could limit the effects of cognitive bias due to self-report following the rule that your body cannot lie. In this pape...

  16. Building real-time audio applications with component technology

    OpenAIRE

    Mork, Eivind

    2005-01-01

    The thesis looks at how QoS-aware applications (QSAs), with an Internet phone as a case, can be built from components (with Enterprise Java Beans (EJB) as the chosen component model). It also identifies limitations of the EJB standard that cause problems implementing real-time audio applications. The requirements to the EJB platform are identified by analyzing a generic design which is made from common components. These components are found by inspecting existing applicat...

  17. Evolving artificial neural networks for cross-adaptive audio effects

    OpenAIRE

    Jordal, Iver

    2017-01-01

    Cross-adaptive audio effects have many applications within music technology, including for automatic mixing and live music. Commonly used methods of signal analysis capture the acoustical and mathematical features of the signal well, but struggle to capture the musical meaning. Together with the vast number of possible signal interactions, this makes manual exploration of signal interactions difficult and tedious. This project investigates Artificial Intelligence (AI) methods for finding usef...

  18. Active Learning for Automatic Audio Processing of Unwritten Languages (ALAPUL)

    Science.gov (United States)

    2016-07-01

    affixes or stem morphemes; however, this kind of knowledge is hard to operationalize if nothing more is known about the target language utterance...procedure. A reasonable expectation is that audio of this kind will lend itself to more accurate pattern matching. Furthermore, the fact that one...learning the vocabulary of the language and is using lightly supervised annotations on the data to iteratively augment and confirm the discovered

  19. Representation of sound fields for audio recording and reproduction

    OpenAIRE

    Fazi, Filippo; Noisternig, Markus; Warusfel, Olivier

    2012-01-01

    International audience; Spherical and circular microphone arrays and loudspeaker arrays are often used for the recording and reproduction of a given sound field. A number of approaches and formats are available for the representation of the recorded field, some of which are more popular among the audio engineering community (B-format, virtual microphones, etc.) whilst other representations are widely used in the literature on mathematics (generalized Fourier series, single layer potential, He...

  20. Microphone array processing for parametric spatial audio techniques

    OpenAIRE

    Politis, Archontis

    2016-01-01

    Reproduction of spatial properties of recorded sound scenes is increasingly recognised as a crucial element of all emerging immersive applications, with domestic or cinema-oriented audiovisual reproduction for entertainment, telepresence and immersive teleconferencing, and augmented and virtual reality being key examples. Such applications benefit from a general spatial audio processing framework, being able to exploit spatial information from a variety of recording formats in order to reprod...

  1. Modular Sensor Environment : Audio Visual Industry Monitoring Applications

    OpenAIRE

    Guillot, Calvin

    2017-01-01

    This work was made for Electro Waves Oy. The company specializes in Audio-visual services and interactive systems. The purpose of this work is to design and implement a modular sensor environment for the company, which will be used for developing automated systems. This thesis begins with an introduction to sensor systems and their different topologies. It is followed by an introduction to the technologies used in this project. The system is divided in three parts. The client, tha...

  2. Classification of Overlapped Audio Events Based on AT, PLSA, and the Combination of Them

    Directory of Open Access Journals (Sweden)

    Y. Leng

    2015-06-01

    Full Text Available Audio event classification, as an important part of Computational Auditory Scene Analysis, has attracted much attention. Currently, the classification technology is mature enough to classify isolated audio events accurately, but for overlapped audio events, it performs much worse. While in real life, most audio documents would have certain percentage of overlaps, and so the overlap classification problem is an important part of audio classification. Nowadays, the work on overlapped audio event classification is still scarce, and most existing overlap classification systems can only recognize one audio event for an overlap. In this paper, in order to deal with overlaps, we innovatively introduce the author-topic (AT model which was first proposed for text analysis into audio classification, and innovatively combine it with PLSA (Probabilistic Latent Semantic Analysis. We propose 4 systems, i.e. AT, PLSA, AT-PLSA and PLSA-AT, to classify overlaps. The 4 proposed systems have the ability to recognize two or more audio events for an overlap. The experimental results show that the 4 systems perform well in classifying overlapped audio events, whether it is the overlap in training set or the overlap out of training set. Also they perform well in classifying isolated audio events.

  3. The method of narrow-band audio classification based on universal noise background model

    Science.gov (United States)

    Rui, Rui; Bao, Chang-chun

    2013-03-01

    Audio classification is the basis of content-based audio analysis and retrieval. The conventional classification methods mainly depend on feature extraction of audio clip, which certainly increase the time requirement for classification. An approach for classifying the narrow-band audio stream based on feature extraction of audio frame-level is presented in this paper. The audio signals are divided into speech, instrumental music, song with accompaniment and noise using the Gaussian mixture model (GMM). In order to satisfy the demand of actual environment changing, a universal noise background model (UNBM) for white noise, street noise, factory noise and car interior noise is built. In addition, three feature schemes are considered to optimize feature selection. The experimental results show that the proposed algorithm achieves a high accuracy for audio classification, especially under each noise background we used and keep the classification time less than one second.

  4. Sounding better: fast audio cues increase walk speed in treadmill-mediated virtual rehabilitation environments.

    Science.gov (United States)

    Powell, Wendy; Stevens, Brett; Hand, Steve; Simmonds, Maureen

    2010-01-01

    Music or sound effects are often used to enhance Virtual Environments, but it is not known how this audio may influence gait speed. This study investigated the influence of audio cue tempo on treadmill walking with and without visual flow. The walking speeds of 11 individuals were recorded during exposure to a range of audio cue rates. There was a significant effect of audio tempo without visual flow, with a 16% increase in walk speed with faster audio cue tempos. Audio with visual flow resulted in a smaller but still significant increase in walking speed (8%). The results suggest that the inclusion of faster rate audio cues may be of benefit in improving walk speed in virtual rehabilitation.

  5. Media Entrepreneurship

    DEFF Research Database (Denmark)

    Khajeheian, Datis

    2017-01-01

    Media Entrepreneurship has been an ambiguous, unclear and controversial concept and despite of growing academic efforts in the last decade, it is still a poorly defined subject. This paper is an effort to fill this gap by providing a comprehensive definition of media entrepreneurship. Firstly......, a literature review conducted and entrepreneurship, media, opportunity and innovation as building blocks of media entrepreneurship explained. Then by using of a mixed of bibliographic method and a Delphi method with multi-stage analysis process, a consensual definition of media entrepreneurship proposed...... entrepreneurship....

  6. Media Technology

    Directory of Open Access Journals (Sweden)

    Zhou Gang

    2016-01-01

    Full Text Available Modern colleges are faced with the dual pressures of university reform and international competition, how to overcome difficulties, to play the role of modern English teaching in colleges and colleges to enhance the core competitiveness of colleges, colleges and colleges modern English teaching problems to be solved. Based on the current situation of modern colleges in the premise of the Modern media platform fully demonstrated the characteristics and viability of the Modern media English teaching, the necessity of modern English teaching of college Modern media. Discusses the Modern media targeting English teaching and important role is in the English teaching to guide the development of modern colleges modern media.

  7. Media Framing

    DEFF Research Database (Denmark)

    Pedersen, Rasmus T.

    2017-01-01

    The concept of media framing refers to the way in which the news media organize and provide meaning to a news story by emphasizing some parts of reality and disregarding other parts. These patterns of emphasis and exclusion in news coverage create frames that can have considerable effects on news...... consumers’ perceptions and attitudes regarding the given issue or event. This entry briefly elaborates on the concept of media framing, presents key types of media frames, and introduces the research on media framing effects....

  8. A method to synchronise video cameras using the audio band.

    Science.gov (United States)

    Leite de Barros, Ricardo Machado; Guedes Russomanno, Tiago; Brenzikofer, René; Jovino Figueroa, Pascual

    2006-01-01

    This paper proposes and evaluates a novel method for synchronisation of video cameras using the audio band. The method consists in generating and transmitting an audio signal through radio frequency for receivers connected to the microphone input of the cameras and inserting the signal in the audio band. In a software environment, the phase differences among the video signals are calculated and used to interpolate the synchronous 2D projections of the trajectories. The validation of the method was based on: (1) Analysis of the phase difference changes as a function of time of two video signals. (2) Comparison between the values measured with an oscilloscope and by the proposed method. (3) Estimation of the improvement in the accuracy in the measurements of the distance between two markers mounted on a rigid body during movement applying the method. The results showed that the phase difference changes in time slowly (0.150 ms/min) and linearly, even when the same model of cameras are used. The values measured by the proposed method and by oscilloscope showed equivalence (R2=0.998), the root mean square of the difference between the measurements was 0.10 ms and the maximum difference found was 0.31 ms. Applying the new method, the accuracy of the 3D reconstruction had a statistically significant improvement. The accuracy, simplicity and wide applicability of the proposed method constitute the main contributions of this work.

  9. Ears on the hand: reaching 3D audio targets

    Directory of Open Access Journals (Sweden)

    Hanneton Sylvain

    2011-12-01

    Full Text Available We studied the ability of right-handed participants to reach 3D audio targets with their right hand. Our immersive audio environment was based on the OpenAL library and Fastrak magnetic sensors for motion capture. Participants listen the target through a “virtual” listener linked to a sensor fixed either on the head or on the hand. We compare three experimental conditions in which the virtual listener is on the head, on the left hand, and on the right hand (that reach the target. We show that (1 participants are able to learn the task but (2 with a low success rate and high durations, (3 the individual levels of performance are very variable, (4 the best performances are achieved when the listener is on the right hand. Consequently, we concluded that our participants were able to learn to locate 3D audio sources even if their ears are transposed on their hand, but we found of behavioral differences between the three experimental conditions.

  10. Comparison of Linear Prediction Models for Audio Signals

    Directory of Open Access Journals (Sweden)

    2009-03-01

    Full Text Available While linear prediction (LP has become immensely popular in speech modeling, it does not seem to provide a good approach for modeling audio signals. This is somewhat surprising, since a tonal signal consisting of a number of sinusoids can be perfectly predicted based on an (all-pole LP model with a model order that is twice the number of sinusoids. We provide an explanation why this result cannot simply be extrapolated to LP of audio signals. If noise is taken into account in the tonal signal model, a low-order all-pole model appears to be only appropriate when the tonal components are uniformly distributed in the Nyquist interval. Based on this observation, different alternatives to the conventional LP model can be suggested. Either the model should be changed to a pole-zero, a high-order all-pole, or a pitch prediction model, or the conventional LP model should be preceded by an appropriate frequency transform, such as a frequency warping or downsampling. By comparing these alternative LP models to the conventional LP model in terms of frequency estimation accuracy, residual spectral flatness, and perceptual frequency resolution, we obtain several new and promising approaches to LP-based audio modeling.

  11. The Impact of Audio Book on the Elderly Mental Health.

    Science.gov (United States)

    Ameri, Fereshteh; Vazifeshenas, Naser; Haghparast, Abbas

    2017-01-01

    The growing elderly population calls mental health professionals to take measures concerning the treatment of the elderly mental disorders. Today in developed countries, bibliotherapy is used for the treatment of the most prevalent psychiatric disorders. Therefore, this study aimed to investigate the effects of audio book on the elderly mental health of Retirement Center of Shahid Beheshti University of Medical Sciences. This experimental study was conducted on 60 elderly people participated in 8 audio book presentation sessions, and their mental health aspects were evaluated through mental health questionnaire (SCL-90-R). Data were analyzed using SPSS 24. Data analysis revealed that the mean difference of pretest and posttest of control group is less than 5.0, so no significant difference was observed in their mental health, but this difference was significant in the experimental group (more than 5.0). Therefore, a significant improvement in mental health and its dimensions have observed in elderly people participated in audio book sessions. This therapeutic intervention was effective on mental health dimensions of paranoid ideation, psychosis, phobia, aggression, depression, interpersonal sensitivity, anxiety, obsessive-compulsive and somatic complaints. Considering the fact that our population is moving toward aging, the obtained results could be useful for policy makers and health and social planners to improve the health status of the elderly.

  12. 3D future internet media

    CERN Document Server

    Dagiuklas, Tasos

    2014-01-01

    This book describes recent innovations in 3D media and technologies, with coverage of 3D media capturing, processing, encoding, and adaptation, networking aspects for 3D Media, and quality of user experience (QoE). The main contributions are based on the results of the FP7 European Projects ROMEO, which focus on new methods for the compression and delivery of 3D multi-view video and spatial audio, as well as the optimization of networking and compression jointly across the Future Internet (www.ict-romeo.eu). The delivery of 3D media to individual users remains a highly challenging problem due to the large amount of data involved, diverse network characteristics and user terminal requirements, as well as the user’s context such as their preferences and location. As the number of visual views increases, current systems will struggle to meet the demanding requirements in terms of delivery of constant video quality to both fixed and mobile users. ROMEO will design and develop hybrid-networking solutions that co...

  13. Novel 3D media technologies

    CERN Document Server

    Dagiuklas, Tasos

    2015-01-01

    This book describes recent innovations in 3D media and technologies, with coverage of 3D media capturing, processing, encoding, and adaptation, networking aspects for 3D Media, and quality of user experience (QoE). The contributions are based on the results of the FP7 European Project ROMEO, which focuses on new methods for the compression and delivery of 3D multi-view video and spatial audio, as well as the optimization of networking and compression jointly across the future Internet. The delivery of 3D media to individual users remains a highly challenging problem due to the large amount of data involved, diverse network characteristics and user terminal requirements, as well as the user’s context such as their preferences and location. As the number of visual views increases, current systems will struggle to meet the demanding requirements in terms of delivery of consistent video quality to fixed and mobile users. ROMEO will present hybrid networking solutions that combine the DVB-T2 and DVB-NGH broadcas...

  14. Inner Sound: Altered States of Consciousness in Electronic Music and Audio-Visual Media

    DEFF Research Database (Denmark)

    Weinel, Jonathan

    the creative influence of ASCs, from Amazonian chicha festivals to the synaesthetic assaults of neon raves; and from an immersive outdoor electroacoustic performance on an Athenian hilltop to a mushroom trip on a tropical island in virtual reality. Beginning with a discussion of consciousness, the book...

  15. Violence in Audio-Visual Media: How Educators Can Respond. ERIC Digest.

    Science.gov (United States)

    Hepburn, Mary A.

    Over the past 20 years there have been numerous studies and frequent warnings about violent television programs and movies arousing young people to act violently. Researchers have pointed to many hours of viewing excessive violence as a potential contributor to violent behavior by youngsters. This digest examines evidence of violence in television…

  16. Audio-Visual Media as an Instructional Technique for Reducing Prejudice in Young Children.

    Science.gov (United States)

    Houser, Betsy Bosak

    A study was conducted to determine the effectiveness of two educational films, "Skipper Learns a Lesson" and "The Toymaker," to shape children's perception of minority groups. Before and after viewing the films, 153 grade-school-aged children were asked to look at coloring book style portraits of Caucasian and minority children and to rate them…

  17. Audio-visual temporal recalibration can be constrained by content cues regardless of spatial overlap

    Directory of Open Access Journals (Sweden)

    Warrick eRoseboom

    2013-04-01

    Full Text Available It has now been well established that the point of subjective synchrony for audio and visual events can be shifted following exposure to asynchronous audio-visual presentations, an effect often referred to as temporal recalibration. Recently it was further demonstrated that it is possible to concurrently maintain two such recalibrated, and opposing, estimates of audio-visual temporal synchrony. However, it remains unclear precisely what defines a given audio-visual pair such that it is possible to maintain a temporal relationship distinct from other pairs. It has been suggested that spatial separation of the different audio-visual pairs is necessary to achieve multiple distinct audio-visual synchrony estimates. Here we investigated if this was necessarily true. Specifically, we examined whether it is possible to obtain two distinct temporal recalibrations for stimuli that differed only in featural content. Using both complex (audio visual speech; Experiment 1 and simple stimuli (high and low pitch audio matched with either vertically or horizontally oriented Gabors; Experiment 2 we found concurrent, and opposite, recalibrations despite there being no spatial difference in presentation location at any point throughout the experiment. This result supports the notion that the content of an audio-visual pair can be used to constrain distinct audio-visual synchrony estimates regardless of spatial overlap.

  18. Audio-Visual Temporal Recalibration Can be Constrained by Content Cues Regardless of Spatial Overlap.

    Science.gov (United States)

    Roseboom, Warrick; Kawabe, Takahiro; Nishida, Shin'ya

    2013-01-01

    It has now been well established that the point of subjective synchrony for audio and visual events can be shifted following exposure to asynchronous audio-visual presentations, an effect often referred to as temporal recalibration. Recently it was further demonstrated that it is possible to concurrently maintain two such recalibrated estimates of audio-visual temporal synchrony. However, it remains unclear precisely what defines a given audio-visual pair such that it is possible to maintain a temporal relationship distinct from other pairs. It has been suggested that spatial separation of the different audio-visual pairs is necessary to achieve multiple distinct audio-visual synchrony estimates. Here we investigated if this is necessarily true. Specifically, we examined whether it is possible to obtain two distinct temporal recalibrations for stimuli that differed only in featural content. Using both complex (audio visual speech; see Experiment 1) and simple stimuli (high and low pitch audio matched with either vertically or horizontally oriented Gabors; see Experiment 2) we found concurrent, and opposite, recalibrations despite there being no spatial difference in presentation location at any point throughout the experiment. This result supports the notion that the content of an audio-visual pair alone can be used to constrain distinct audio-visual synchrony estimates regardless of spatial overlap.

  19. Media stylistics

    OpenAIRE

    Lambrou, Marina; Durant, Alan

    2014-01-01

    In this chapter we review the concept of ‘media stylistics’. In particular, we disentangle the polysemy of these two terms which, when combined, describe but can also obscure work in this area; and we discuss key themes and concerns which emerge. Through analysis of two short extracts of media discourse in English, we elaborate a distinction between two alternative emphases: study of media language as concerned with the capabilities associated with changing technologies for conveying linguist...

  20. Media Flow

    DEFF Research Database (Denmark)

    Kabel, Lars

    2016-01-01

    News and other kinds of journalistic stories, 16-17 hours a day, all year round, on all platforms, also the moderated social media. The key research thesis behind this article is that the continuous and speedy stream of news stories and media content now is becoming the centre of the production...... processes and the value creation in converged multimedia newsrooms. The article identify new methods and discuss editorial challenges in handling media flow....

  1. Cross-media communication in context

    DEFF Research Database (Denmark)

    Thorhauge, Anne Mette; Lomborg, Stine

    2016-01-01

    In this article, we suggest and discuss a qualitative, multi-methods approach to data collected on smartphones as a way of uncovering a user-centred perspective on cross-media communication. As an individualised multimedia device, the smartphone represents a relevant starting point for studying...... individual users’ cross-media practices. Moreover, the technological affordances of the smartphone, including built-in sensors and GPS tracker as well as features for capturing photo, audio and video material, enable the collection of a wide range of data. These properties have mainly been approached from...... a quantitative point of view focusing on automatically logged use data as an alternative to, for instance, survey data. Complementing this evidence, we argue that a qualitative, multiple-method approach to data collected on smartphones provides crucial insight into the contexts and everyday practices of cross-media...

  2. Using New Media to Reach Broad Audiences

    Science.gov (United States)

    Gay, P. L.

    2008-06-01

    The International Year of Astronomy New Media Working Group (IYA NMWG) has a singular mission: To flood the Internet with ways to learn about astronomy, interact with astronomers and astronomy content, and socially network with astronomy. Within each of these areas, we seek to build lasting programs and partnerships that will continue beyond 2009. Our weapon of choice is New Media. It is often easiest to define New Media by what it is not. Television, radio, print and their online redistribution of content are not New Media. Many forms of New Media start as user provided content and content infrastructures that answer that individual's creative whim in a way that is adopted by a broader audience. Classic examples include Blogs and Podcasts. This media is typically distributed through content specific websites and RSS feeds, which allow syndication. RSS aggregators (iTunes has audio and video aggregation abilities) allow subscribers to have content delivered to their computers automatically when they connect to the Internet. RSS technology is also being used in such creative ways as allowing automatically updating Google-maps that show the location of someone with an intelligent GPS system, and in sharing 100 word microblogs from anyone (Twitters) through a single feed. In this poster, we outline how the IYA NMWG plans to use New Media to reach target primary audiences of astronomy enthusiasts, image lovers, and amateur astronomers, as well as secondary audiences, including: science fiction fans, online gamers, and skeptics.

  3. Music and audio - oh how they can stress your network

    Science.gov (United States)

    Fletcher, R.

    Nearly ten years ago a paper written by the Audio Engineering Society (AES)[1] made a number of interesting statements: 1. 2. The current Internet is inadequate for transmitting music and professional audio. Performance and collaboration across a distance stress beyond acceptable bounds the quality of service Audio and music provide test cases in which the bounds of the network are quickly reached and through which the defects in a network are readily perceived. Given these key points, where are we now? Have we started to solve any of the problems from the musician's point of view? What is it that musician would like to do that can cause the network so many problems? To understand this we need to appreciate that a trained musician's ears are extremely sensitive to very subtle shifts in temporal materials and localisation information. A shift of a few milliseconds can cause difficulties. So, can modern networks provide the temporal accuracy demanded at this level? The sample and bit rates needed to represent music in the digital domain is still contentious, but a general consensus in the professional world is for 96 KHz and IEEE 64-bit floating point. If this was to be run between two points on the network across 24 channels in near real time to allow for collaborative composition/production/performance, with QOS settings to allow as near to zero latency and jitter, it can be seen that the network indeed has to perform very well. Lighting the Blue Touchpaper for UK e-Science - Closing Conference of ESLEA Project The George Hotel, Edinburgh, UK 26-28 March, 200

  4. Music Genre Classification Using MIDI and Audio Features

    OpenAIRE

    Cataltepe Zehra; Yaslan Yusuf; Sonmez Abdullah

    2007-01-01

    We report our findings on using MIDI files and audio features from MIDI, separately and combined together, for MIDI music genre classification. We use McKay and Fujinaga's 3-root and 9-leaf genre data set. In order to compute distances between MIDI pieces, we use normalized compression distance (NCD). NCD uses the compressed length of a string as an approximation to its Kolmogorov complexity and has previously been used for music genre and composer clustering. We convert the MIDI pieces to a...

  5. Audio Logo Recognition, Reduced Articulation and Coding Orientation

    DEFF Research Database (Denmark)

    Bonde, Anders; Hansen, Allan Grutt

    2013-01-01

    connected to notions of brand recognisability and brand identification, thus resulting in the concept of ‘Reduced Articulation Form’ (RAF). The concept has been tested empirically through a survey of 137 upper secondary school students. On the basis of a conditioning experiment, manipulating five existing...... audio logos in terms of tempo, rhythm, pitch and timbre, the students filled out a structured questionnaire and assessed at which condition they were able to recognise the logos and the corresponding brands. The results indicated that pitch is a much more recognisable trait than rhythm. Also, while...

  6. Digital video and audio broadcasting technology a practical engineering guide

    CERN Document Server

    Fischer, Walter

    2010-01-01

    Digital Video and Audio Broadcasting Technology - A Practical Engineering Guide' deals with all the most important digital television, sound radio and multimedia standards such as MPEG, DVB, DVD, DAB, ATSC, T-DMB, DMB-T, DRM and ISDB-T. The book provides an in-depth look at these subjects in terms of practical experience. In addition it contains chapters on the basics of technologies such as analog television, digital modulation, COFDM or mathematical transformations between time and frequency domains. The attention in the respective field under discussion is focussed on aspects of measuring t

  7. Audio-Visual Perception System for a Humanoid Robotic Head

    OpenAIRE

    Raquel Viciana-Abad; Rebeca Marfil; Perez-Lorenzo, Jose M.; Juan P. Bandera; Adrian Romero-Garces; Pedro Reche-Lopez

    2014-01-01

    One of the main issues within the field of social robotics is to endow robots with the ability to direct attention to people with whom they are interacting. Different approaches follow bio-inspired mechanisms, merging audio and visual cues to localize a person using multiple sensors. However, most of these fusion mechanisms have been used in fixed systems, such as those used in video-conference rooms, and thus, they may incur difficulties when constrained to the sensors with which a robot can...

  8. Navigation for the Blind through Audio-Based Virtual Environments.

    Science.gov (United States)

    Sánchez, Jaime; Sáenz, Mauricio; Pascual-Leone, Alvaro; Merabet, Lotfi

    2010-01-01

    We present the design, development and an initial study changes and adaptations related to navigation that take place in the brain, by incorporating an Audio-Based Environments Simulator (AbES) within a neuroimaging environment. This virtual environment enables a blind user to navigate through a virtual representation of a real space in order to train his/her orientation and mobility skills. Our initial results suggest that this kind of virtual environment could be highly efficient as a testing, training and rehabilitation platform for learning and navigation.

  9. The complete guide to high-end audio

    CERN Document Server

    Harley, Robert

    2015-01-01

    An updated edition of what many consider the "bible of high-end audio"   In this newly revised and updated fifth edition, Robert Harley, editor in chief of the Absolute Sound magazine, tells you everything you need to know about buying and enjoying high-quality hi-fi. With this book, discover how to get the best sound for your money, how to identify the weak links in your system and upgrade where it will do the most good, how to set up and tweak your system for maximum performance, and how to become a more perceptive and appreciative listener. Just a few of the secrets you will learn cover hi

  10. Tools for signal compression applications to speech and audio coding

    CERN Document Server

    Moreau, Nicolas

    2013-01-01

    This book presents tools and algorithms required to compress/uncompress signals such as speech and music. These algorithms are largely used in mobile phones, DVD players, HDTV sets, etc. In a first rather theoretical part, this book presents the standard tools used in compression systems: scalar and vector quantization, predictive quantization, transform quantization, entropy coding. In particular we show the consistency between these different tools. The second part explains how these tools are used in the latest speech and audio coders. The third part gives Matlab programs simulating t

  11. An assessment of individualized technical ear training for audio production.

    Science.gov (United States)

    Kim, Sungyoung

    2015-07-01

    An individualized technical ear training method is compared to a non-individualized method. The efficacy of the individualized method is assessed using a standardized test conducted before and after the training period. Participants who received individualized training improved better than the control group on the test. Results indicate the importance of individualized training for acquisition of spectrum-identification and spectrum-matching skills. Individualized training, therefore, should be implemented by default into technical ear training programs used in audio production industry and education.

  12. Utilization of non-linear converters for audio amplification

    DEFF Research Database (Denmark)

    Iversen, Niels Elkjær; Birch, Thomas; Knott, Arnold

    2012-01-01

    Class D amplifiers fits the automotive demands quite well. The traditional buck-based amplifier has reduced both the cost and size of amplifiers. However the buck topology is not without its limitations. The maximum peak AC output voltage produced by the power stage is only equal the supply voltage....... The introduction of non-linear converters for audio amplification defeats this limitation. A Cuk converter, designed to deliver an AC peak output voltage twice the supply voltage, is presented in this paper. A 3V prototype has been developed to prove the concept. The prototype shows that it is possible to achieve...

  13. Haptic and Visual feedback in 3D Audio Mixing Interfaces

    DEFF Research Database (Denmark)

    Gelineck, Steven; Overholt, Daniel

    2015-01-01

    This paper describes the implementation and informal evaluation of a user interface that explores haptic feedback for 3D audio mixing. The implementation compares different approaches using either the LEAP Motion for mid-air hand gesture control, or the Novint Falcon for active haptic feed- back...... in order to augment the perception of the 3D space. We compare different interaction paradigms implemented using these interfaces, aiming to increase speed and accuracy and reduce the need for constant visual feedback. While the LEAP Motion relies upon visual perception and proprioception, users can forego...

  14. Print media vs internet media

    OpenAIRE

    Koganuramath, M. M.; Angadi, Mallikarjun

    1999-01-01

    The Information Technology has revolutionised the communication media with the emergence of Internet. This paper describes the pace of change in print media to On-line journalism. The process has began with On-line journalism utilising Internet wherein websites are replacing the print media. Most of the On-line newspapers are free, interactive and archival in nature and it provides users to search the information on newspapers through various access points i.e. by contributors, title, and dat...

  15. Efficient Query-by-Content Audio Retrieval by Locality Sensitive Hashing and Partial Sequence Comparison

    Science.gov (United States)

    Yu, Yi; Joe, Kazuki; Downie, J. Stephen

    This paper investigates suitable indexing techniques to enable efficient content-based audio retrieval in large acoustic databases. To make an index-based retrieval mechanism applicable to audio content, we investigate the design of Locality Sensitive Hashing (LSH) and the partial sequence comparison. We propose a fast and efficient audio retrieval framework of query-by-content and develop an audio retrieval system. Based on this framework, four different audio retrieval schemes, LSH-Dynamic Programming (DP), LSH-Sparse DP (SDP), Exact Euclidian LSH (E2LSH)-DP, E2LSH-SDP, are introduced and evaluated in order to better understand the performance of audio retrieval algorithms. The experimental results indicate that compared with the traditional DP and the other three compititive schemes, E2LSH-SDP exhibits the best tradeoff in terms of the response time, retrieval accuracy and computation cost.

  16. Comparison of audio vs. written feedback on clinical assignments of nursing students.

    Science.gov (United States)

    Bourgault, Annette M; Mundy, Cynthia; Joshua, Thomas

    2013-01-01

    This pilot study explored using audio recordings as method of feedback for weekly clinical assignments of nursing students. Feedback that provides students with insight into their performance is an essential component of nursing education. Audio methods have been used to communicate feedback on written assignments in other disciplines, but this method has not been reported in the nursing literature. A survey and VARK questionnaire were completed by eight nursing students. Each student had randomly received written and audio feedback during an eight-week period. There were no differences between written and audio methods. Students perceived audio as the most personal, easy to understand, and positive method. Only one student expressed a preference for written feedback.There was no difference in instructor time. Audio feedback is an innovative method of feedback for clinical assignments of 'Net Generation' nursing students.

  17. WebGL and web audio software lightweight components for multimedia education

    Science.gov (United States)

    Chang, Xin; Yuksel, Kivanc; Skarbek, Władysław

    2017-08-01

    The paper presents the results of our recent work on development of contemporary computing platform DC2 for multimedia education usingWebGL andWeb Audio { the W3C standards. Using literate programming paradigm the WEBSA educational tools were developed. It offers for a user (student), the access to expandable collection of WEBGL Shaders and web Audio scripts. The unique feature of DC2 is the option of literate programming, offered for both, the author and the reader in order to improve interactivity to lightweightWebGL andWeb Audio components. For instance users can define: source audio nodes including synthetic sources, destination audio nodes, and nodes for audio processing such as: sound wave shaping, spectral band filtering, convolution based modification, etc. In case of WebGL beside of classic graphics effects based on mesh and fractal definitions, the novel image processing analysis by shaders is offered like nonlinear filtering, histogram of gradients, and Bayesian classifiers.

  18. Media darling

    CERN Multimedia

    Chalmers, Matthew

    2008-01-01

    He is the media-friendly face of particle physics, appearing on countless TV and radio shows in the run-up to the opening of CERN's Large Hadron Collider. Matthew Chalmers discovers how Brian Cox finds the time to be both a physicist and a media personality. (2 pages)

  19. Voice radio communication, pedestrian localization, and the tactical use of 3D audio

    OpenAIRE

    Nilsson, John-Olof; Schüldt, Christian; Händel, Peter

    2013-01-01

    The relation between voice radio communication and pedestrian localization is studied. 3D audio is identified as a linking technology which brings strong mutual benefits. Voice communication rendered with 3D audio provides a potential low secondary task interference user interface to the localization information. Vice versa, location information in the 3D audio provides spatial cues in the voice communication, improving speech intelligibility. An experimental setup with voice radio communicat...

  20. Audio editing in the time-frequency domain using the Gabor Wavelet Transform

    OpenAIRE

    Hammarqvist, Ulf

    2011-01-01

    Visualization, processing and editing of audio, directly on a time-frequency surface, is the scope of this thesis. More precisely the scalogram produced by a Gabor Wavelet transform is used, which is a powerful alternative to traditional techinques where the wave form is the main visual aid and editting is performed by parametric filters. Reconstruction properties, scalogram design and enhancements as well audio manipulation algorithms are investigated for this audio representation.The scalog...

  1. Generative Audio Systems: Musical Applications of Time-Varying Feedback Networks and Computational Aesthetics

    OpenAIRE

    Surges, Gregory

    2015-01-01

    This dissertation is focused on the development of generative audio systems - a term used describe generative music systems that generate both formal structure and synthesized audio content from the same audio-rate computational process. In other words, a system wherein the synthesis and organizational processes are inseparable and operate at the sample level.First, a series of generative software systems are described. These systems each employ a different method to create generativity and, ...

  2. Pengguna Media Interaktif Sebagai Kenyataan Maya: Studi Resepsi Khalayak Suarasurabaya.net Sebagai Media Interaktif

    Directory of Open Access Journals (Sweden)

    Ido Prijana Hadi

    2011-07-01

    Full Text Available My aim in writing this paper is to describe that in this fast-changing world, media in Indonesia has undergone a rapid transformation. Digital technology continues to reshape the mass media landscape using internet technology. Internet brings a technical communication revolution, a fundamental change takes place in the structure of connections, artificial memories and the reproduction of their content. Internet technology has made communication much easier and less expensive. It has attracted many people and has penetrated into people’s daily lives. The mass media also have accepted the internet. Almost all forms of traditional media (old media in local media, such as radio, television, and newspaper have extended their work into this new field. The internet and the World Wide Web have both significantly influenced modern journalism. In online media allows readers to enjoy browsing their product and service of contents, such as news feed, podcasts, desktop alert, news on mobile phones, PDA and others mobile devices. Online media offer not only text but also digital images , audio file, moving images (video, internet radio and internet t v. The interactive features of the internet seemingly imply that online media have more advantages than traditional media forms (old media. So, the internet have dramatically evolved become new media with characteristic multimedia, hypertext, interactivity, archives , and virtuality. The most important structural new media characteristic is the integration of telecommunications, data communications and mass communication in a single medium – it is the convergence. It should be pointed out that the trend toward digital is affecting the various media and brings the local media in East Java to become a global media, where breaking news from Surabaya or anywhere in East Java is transmitted to around the world in a matter of minutes . The research was carried out to find out how user reception on convergence media

  3. Multidimensional Attributes of the Sense of Presence in Audio-Visual Content

    Directory of Open Access Journals (Sweden)

    Kazutomo Fukue

    2011-10-01

    Full Text Available The sense of presence is crucial for evaluating audio-visual equipment and content. To clarify the multidimensional attributes of the sense, we conducted three experiments on audio, visual, and audio-visual content items. Initially 345 adjectives, which express the sense of presence, were collected and the number of adjectives was reduced to 40 pairs based on the KJ method. Forty scenes were recorded with a high-definition video camera while their sounds were recorded using a dummy head. Each content item was reproduced with a 65-inch display and headphones in three conditions of audio-only, visual-only and audio-visual. Twenty-one subjects evaluated them using the 40 pairs of adjectives by the Semantic Differential method with seven-point scales. The sense of presence in each content item was also evaluated using a Likert scale. The experimental data was analyzed by the factor analysis and four, five and five factors were extracted for audio, visual, and audio-visual conditions, respectively. The multiple regression analysis revealed that audio and audio-visual presences were explained by the extracted factors, although further consideration is required for the visual presence. These results indicated that the factors of psychological loading and activity are relevant for the sense of presence.

  4. On the relative importance of audio and video in the presence of packet losses

    DEFF Research Database (Denmark)

    Korhonen, Jari; Reiter, Ulrich; Myakotnykh, Eugene

    2010-01-01

    In streaming applications, unequal protection of audio and video tracks may be necessary to maintain the optimal perceived overall quality. For this purpose, the application should be aware of the relative importance of audio and video in an audiovisual sequence. In this paper, we propose a subje...... and video quality, but also that the currently used classification criteria for content are not sufficient to predict the users’ preference...... a subjective test arrangement for finding the optimal tradeoff between subjective audio and video qualities in situations when it is not possible to have perfect quality for both modalities concurrently. Our results show that content poses a significant impact on the preferred compromise between audio...

  5. Paper-Based Textbooks with Audio Support for Print-Disabled Students.

    Science.gov (United States)

    Fujiyoshi, Akio; Ohsawa, Akiko; Takaira, Takuya; Tani, Yoshiaki; Fujiyoshi, Mamoru; Ota, Yuko

    2015-01-01

    Utilizing invisible 2-dimensional codes and digital audio players with a 2-dimensional code scanner, we developed paper-based textbooks with audio support for students with print disabilities, called "multimodal textbooks." Multimodal textbooks can be read with the combination of the two modes: "reading printed text" and "listening to the speech of the text from a digital audio player with a 2-dimensional code scanner." Since multimodal textbooks look the same as regular textbooks and the price of a digital audio player is reasonable (about 30 euro), we think multimodal textbooks are suitable for students with print disabilities in ordinary classrooms.

  6. Audio-Visual Speech Recognition Using MPEG-4 Compliant Visual Features

    Directory of Open Access Journals (Sweden)

    Petar S. Aleksic

    2002-11-01

    Full Text Available We describe an audio-visual automatic continuous speech recognition system, which significantly improves speech recognition performance over a wide range of acoustic noise levels, as well as under clean audio conditions. The system utilizes facial animation parameters (FAPs supported by the MPEG-4 standard for the visual representation of speech. We also describe a robust and automatic algorithm we have developed to extract FAPs from visual data, which does not require hand labeling or extensive training procedures. The principal component analysis (PCA was performed on the FAPs in order to decrease the dimensionality of the visual feature vectors, and the derived projection weights were used as visual features in the audio-visual automatic speech recognition (ASR experiments. Both single-stream and multistream hidden Markov models (HMMs were used to model the ASR system, integrate audio and visual information, and perform a relatively large vocabulary (approximately 1000 words speech recognition experiments. The experiments performed use clean audio data and audio data corrupted by stationary white Gaussian noise at various SNRs. The proposed system reduces the word error rate (WER by 20% to 23% relatively to audio-only speech recognition WERs, at various SNRs (0–30 dB with additive white Gaussian noise, and by 19% relatively to audio-only speech recognition WER under clean audio conditions.

  7. An informed synchronization scheme for audio data hiding

    Science.gov (United States)

    LoboGuerrero, Alejandro; Bas, Patrick; Lienard, Joel

    2004-06-01

    This paper deals with the problem of synchronization in the particular case of audio data hiding. In this kind of application the goal is to increase the information of an audio data set by inserting an imperceptible message. An innovating synchronization scheme that uses informed coding theory is proposed. The goal is to realize a complementary approach from two different techniques in order to obtain an enhanced synchronization system. To that end, the analysis of the classical spread spectrum synchronization is done and this classical scheme is improved by the use of side information. Informed coding theory is presented and revisited taking into account the problem of synchronization to enable the selection of signal realizations called Feature Time Points (FTP) which are correlated with a code. Such considerations yield to the definition of informed synchronization. The proposed scheme and the definition of FTP are after presented taking into account the robustness criterion. Finally, results and comparison with classical spread spectrum synchronization schemes are presented.

  8. Audio-Tactile Integration and the Influence of Musical Training

    Science.gov (United States)

    Kuchenbuch, Anja; Paraskevopoulos, Evangelos; Herholz, Sibylle C.; Pantev, Christo

    2014-01-01

    Perception of our environment is a multisensory experience; information from different sensory systems like the auditory, visual and tactile is constantly integrated. Complex tasks that require high temporal and spatial precision of multisensory integration put strong demands on the underlying networks but it is largely unknown how task experience shapes multisensory processing. Long-term musical training is an excellent model for brain plasticity because it shapes the human brain at functional and structural levels, affecting a network of brain areas. In the present study we used magnetoencephalography (MEG) to investigate how audio-tactile perception is integrated in the human brain and if musicians show enhancement of the corresponding activation compared to non-musicians. Using a paradigm that allowed the investigation of combined and separate auditory and tactile processing, we found a multisensory incongruency response, generated in frontal, cingulate and cerebellar regions, an auditory mismatch response generated mainly in the auditory cortex and a tactile mismatch response generated in frontal and cerebellar regions. The influence of musical training was seen in the audio-tactile as well as in the auditory condition, indicating enhanced higher-order processing in musicians, while the sources of the tactile MMN were not influenced by long-term musical training. Consistent with the predictive coding model, more basic, bottom-up sensory processing was relatively stable and less affected by expertise, whereas areas for top-down models of multisensory expectancies were modulated by training. PMID:24465675

  9. Statistical Lip-Appearance Models Trained Automatically Using Audio Information

    Directory of Open Access Journals (Sweden)

    Daubias Philippe

    2002-01-01

    Full Text Available We aim at modeling the appearance of the lower face region to assist visual feature extraction for audio-visual speech processing applications. In this paper, we present a neural network based statistical appearance model of the lips which classifies pixels as belonging to the lips, skin, or inner mouth classes. This model requires labeled examples to be trained, and we propose to label images automatically by employing a lip-shape model and a red-hue energy function. To improve the performance of lip-tracking, we propose to use blue marked-up image sequences of the same subject uttering the identical sentences as natural nonmarked-up ones. The easily extracted lip shapes from blue images are then mapped to the natural ones using acoustic information. The lip-shape estimates obtained simplify lip-tracking on the natural images, as they reduce the parameter space dimensionality in the red-hue energy minimization, thus yielding better contour shape and location estimates. We applied the proposed method to a small audio-visual database of three subjects, achieving errors in pixel classification around 6%, compared to 3% for hand-placed contours and 20% for filtered red-hue.

  10. Separate mechanisms for audio-tactile pitch and loudness interactions

    Directory of Open Access Journals (Sweden)

    Jeffrey M Yau

    2010-10-01

    Full Text Available A major goal in perceptual neuroscience is to understand how signals from different sensory modalities are combined to produce stable and coherent representations. We previously investigated interactions between audition and touch, motivated by the fact that both modalities are sensitive to environmental oscillations. In our earlier study, we characterized the effect of auditory distractors on tactile frequency and intensity perception. Here, we describe the converse experiments examining the effect of tactile distractors on auditory processing. Because the two studies employ the same psychophysical paradigm, we combined their results for a comprehensive view of how auditory and tactile signals interact and how these interactions depend on the perceptual task. Together, our results show that temporal frequency representations are perceptually linked regardless of the attended modality. In contrast, audio-tactile loudness interactions depend on the attended modality: Tactile distractors influence judgments of auditory intensity, but judgments of tactile intensity are impervious to auditory distraction. Lastly, we show that audio-tactile loudness interactions depend critically on stimulus timing, while pitch interactions do not. These results reveal that auditory and tactile inputs are combined differently depending on the perceptual task. That distinct rules govern the integration of auditory and tactile signals in pitch and loudness perception implies that the two are mediated by separate neural mechanisms. These findings underscore the complexity and specificity of multisensory interactions.

  11. Speech and audio processing for coding, enhancement and recognition

    CERN Document Server

    Togneri, Roberto; Narasimha, Madihally

    2015-01-01

    This book describes the basic principles underlying the generation, coding, transmission and enhancement of speech and audio signals, including advanced statistical and machine learning techniques for speech and speaker recognition with an overview of the key innovations in these areas. Key research undertaken in speech coding, speech enhancement, speech recognition, emotion recognition and speaker diarization are also presented, along with recent advances and new paradigms in these areas. ·         Offers readers a single-source reference on the significant applications of speech and audio processing to speech coding, speech enhancement and speech/speaker recognition. Enables readers involved in algorithm development and implementation issues for speech coding to understand the historical development and future challenges in speech coding research; ·         Discusses speech coding methods yielding bit-streams that are multi-rate and scalable for Voice-over-IP (VoIP) Networks; ·     �...

  12. Information-Driven Active Audio-Visual Source Localization.

    Directory of Open Access Journals (Sweden)

    Niclas Schult

    Full Text Available We present a system for sensorimotor audio-visual source localization on a mobile robot. We utilize a particle filter for the combination of audio-visual information and for the temporal integration of consecutive measurements. Although the system only measures the current direction of the source, the position of the source can be estimated because the robot is able to move and can therefore obtain measurements from different directions. These actions by the robot successively reduce uncertainty about the source's position. An information gain mechanism is used for selecting the most informative actions in order to minimize the number of actions required to achieve accurate and precise position estimates in azimuth and distance. We show that this mechanism is an efficient solution to the action selection problem for source localization, and that it is able to produce precise position estimates despite simplified unisensory preprocessing. Because of the robot's mobility, this approach is suitable for use in complex and cluttered environments. We present qualitative and quantitative results of the system's performance and discuss possible areas of application.

  13. Audio-tactile integration and the influence of musical training.

    Directory of Open Access Journals (Sweden)

    Anja Kuchenbuch

    Full Text Available Perception of our environment is a multisensory experience; information from different sensory systems like the auditory, visual and tactile is constantly integrated. Complex tasks that require high temporal and spatial precision of multisensory integration put strong demands on the underlying networks but it is largely unknown how task experience shapes multisensory processing. Long-term musical training is an excellent model for brain plasticity because it shapes the human brain at functional and structural levels, affecting a network of brain areas. In the present study we used magnetoencephalography (MEG to investigate how audio-tactile perception is integrated in the human brain and if musicians show enhancement of the corresponding activation compared to non-musicians. Using a paradigm that allowed the investigation of combined and separate auditory and tactile processing, we found a multisensory incongruency response, generated in frontal, cingulate and cerebellar regions, an auditory mismatch response generated mainly in the auditory cortex and a tactile mismatch response generated in frontal and cerebellar regions. The influence of musical training was seen in the audio-tactile as well as in the auditory condition, indicating enhanced higher-order processing in musicians, while the sources of the tactile MMN were not influenced by long-term musical training. Consistent with the predictive coding model, more basic, bottom-up sensory processing was relatively stable and less affected by expertise, whereas areas for top-down models of multisensory expectancies were modulated by training.

  14. Noise Adaptive Stream Weighting in Audio-Visual Speech Recognition

    Directory of Open Access Journals (Sweden)

    Berthommier Frédéric

    2002-01-01

    Full Text Available It has been shown that integration of acoustic and visual information especially in noisy conditions yields improved speech recognition results. This raises the question of how to weight the two modalities in different noise conditions. Throughout this paper we develop a weighting process adaptive to various background noise situations. In the presented recognition system, audio and video data are combined following a Separate Integration (SI architecture. A hybrid Artificial Neural Network/Hidden Markov Model (ANN/HMM system is used for the experiments. The neural networks were in all cases trained on clean data. Firstly, we evaluate the performance of different weighting schemes in a manually controlled recognition task with different types of noise. Next, we compare different criteria to estimate the reliability of the audio stream. Based on this, a mapping between the measurements and the free parameter of the fusion process is derived and its applicability is demonstrated. Finally, the possibilities and limitations of adaptive weighting are compared and discussed.

  15. Anthropomorphic Coding of Speech and Audio: A Model Inversion Approach

    Directory of Open Access Journals (Sweden)

    W. Bastiaan Kleijn

    2005-06-01

    Full Text Available Auditory modeling is a well-established methodology that provides insight into human perception and that facilitates the extraction of signal features that are most relevant to the listener. The aim of this paper is to provide a tutorial on perceptual speech and audio coding using an invertible auditory model. In this approach, the audio signal is converted into an auditory representation using an invertible auditory model. The auditory representation is quantized and coded. Upon decoding, it is then transformed back into the acoustic domain. This transformation converts a complex distortion criterion into a simple one, thus facilitating quantization with low complexity. We briefly review past work on auditory models and describe in more detail the components of our invertible model and its inversion procedure, that is, the method to reconstruct the signal from the output of the auditory model. We summarize attempts to use the auditory representation for low-bit-rate coding. Our approach also allows the exploitation of the inherent redundancy of the human auditory system for the purpose of multiple description (joint source-channel coding.

  16. Audio-Visual Language--Verbal and Visual Codes.

    Science.gov (United States)

    Doelker, Christian

    1980-01-01

    Figurative (visual representation) and commentator (verbal representation) functions and their use in audiovisual media are discussed. Three categories each of visual and aural media are established: real images, artificial forms, and graphic signs; and sound effects, music, and the spoken language. (RAO)

  17. In Search of an Audio Visual Composing Process.

    Science.gov (United States)

    Lorac, Carol

    Rules for the development and application of audiovisual material are constantly being redesigned whether one is concerned with technological aspects, economic and policy structures, social impact, or media practice. This paper outlines the work being done by the International Media Literacy Project at the Royal University of London. The project…

  18. Media violence.

    Science.gov (United States)

    Cantor, J

    2000-08-01

    Research on the effects of media violence is not well understood by the general public. Despite this fact, there is an overwhelming consensus in the scientific literature about the unhealthy effects of media violence. Meta-analyses show that media-violence viewing consistently is associated with higher levels of antisocial behavior, ranging from the trivial (imitative violence directed against toys) to the serious (criminal violence), with many consequential outcomes in between (acceptance of violence as a solution to problems, increased feelings of hostility, and the apparent delivery of painful stimulation to another person). Desensitization is another well-documented effect of viewing violence, which is observable in reduced arousal and emotional disturbance while witnessing violence, the reduced tendency to intervene in a fight, and less sympathy for the victims of violence. Although there is evidence that youth who are already violent are more likely to seek out violent entertainment, there is strong evidence that the relationship between violence viewing and antisocial behavior is bidirectional. There is growing evidence that media violence also engenders intense fear in children which often lasts days, months, and even years. The media's potential role in solutions to these problems is only beginning to be explored, in investigations examining the uses and effects of movie ratings, television ratings, and the V-chip, and the effects of media literacy programs and public education efforts. Future research should explore important individual differences in responses to media violence and effective ways to intervene in the negative effects.

  19. The Imagination of Communication: On Media Ecology

    Directory of Open Access Journals (Sweden)

    Chun-Hsiang Hsia

    2015-11-01

    Full Text Available Following digital convergence, the press starts new adventures beyond its traditional business scope, in search for new platforms in the internet. Some extend to audio-visual journalism, others ally with radio broadcasters. As a result, conventional communication boundaries start to be blurred, and this trend is ever more intensified by touch screens of smart phones. With this in mind, this essay explores the term “media ecology” as understood in Taiwan, by juxtaposing it with some other related ideas, comparing their respective references, meantime responding to the controversy over its Chinese translations, i.e., “媒介生態學 vs. “媒介環境學”. The author concludes by suggesting a preference for the former, arguing that, if grasped as a methodological notion, it(媒介生態學)serves far better than the latter(媒介環境學)for referring to social reconfigurations and cultural impacts brought up by new media technologies. A more humanistic view of media ecology tends to focus on quality issues about civilization process. In contrast, giving a holistic description of the structural characteristics of a specific media industry could be seen as media ecology of mass media.

  20. Effectiveness and Comparison of Various Audio Distraction Aids in Management of Anxious Dental Paediatric Patients.

    Science.gov (United States)

    Navit, Saumya; Johri, Nikita; Khan, Suleman Abbas; Singh, Rahul Kumar; Chadha, Dheera; Navit, Pragati; Sharma, Anshul; Bahuguna, Rachana

    2015-12-01

    Dental anxiety is a widespread phenomenon and a concern for paediatric dentistry. The inability of children to deal with threatening dental stimuli often manifests as behaviour management problems. Nowadays, the use of non-aversive behaviour management techniques is more advocated, which are more acceptable to parents, patients and practitioners. Therefore, this present study was conducted to find out which audio aid was the most effective in the managing anxious children. The aim of the present study was to compare the efficacy of audio-distraction aids in reducing the anxiety of paediatric patients while undergoing various stressful and invasive dental procedures. The objectives were to ascertain whether audio distraction is an effective means of anxiety management and which type of audio aid is the most effective. A total number of 150 children, aged between 6 to 12 years, randomly selected amongst the patients who came for their first dental check-up, were placed in five groups of 30 each. These groups were the control group, the instrumental music group, the musical nursery rhymes group, the movie songs group and the audio stories group. The control group was treated under normal set-up & audio group listened to various audio presentations during treatment. Each child had four visits. In each visit, after the procedures was completed, the anxiety levels of the children were measured by the Venham's Picture Test (VPT), Venham's Clinical Rating Scale (VCRS) and pulse rate measurement with the help of pulse oximeter. A significant difference was seen between all the groups for the mean pulse rate, with an increase in subsequent visit. However, no significant difference was seen in the VPT & VCRS scores between all the groups. Audio aids in general reduced anxiety in comparison to the control group, and the most significant reduction in anxiety level was observed in the audio stories group. The conclusion derived from the present study was that audio distraction

  1. Looking at reality versus watching screens: Media professionalization effects on the spontaneous eyeblink rate.

    Directory of Open Access Journals (Sweden)

    Celia Andreu-Sánchez

    Full Text Available This article explores whether there are differences in visual perception of narrative between theatrical performances and screens, and whether media professionalization affects visual perception. We created a live theatrical stimulus and three audio-visual stimuli (each one with a different video editing style having the same narrative, and displayed them randomly to participants (20 media professionals and 20 non-media professionals. For media professionals, watching movies on screens evoked a significantly lower spontaneous blink rate (SBR than looking at theatrical performances. Media professionals presented a substantially lower SBR than non-media professionals when watching screens, and more surprisingly, also when seeing reality. According to our results, media professionals pay higher attention to both screens and the real world than do non-media professionals.

  2. Looking at reality versus watching screens: Media professionalization effects on the spontaneous eyeblink rate.

    Science.gov (United States)

    Andreu-Sánchez, Celia; Martín-Pascual, Miguel Ángel; Gruart, Agnès; Delgado-García, José María

    2017-01-01

    This article explores whether there are differences in visual perception of narrative between theatrical performances and screens, and whether media professionalization affects visual perception. We created a live theatrical stimulus and three audio-visual stimuli (each one with a different video editing style) having the same narrative, and displayed them randomly to participants (20 media professionals and 20 non-media professionals). For media professionals, watching movies on screens evoked a significantly lower spontaneous blink rate (SBR) than looking at theatrical performances. Media professionals presented a substantially lower SBR than non-media professionals when watching screens, and more surprisingly, also when seeing reality. According to our results, media professionals pay higher attention to both screens and the real world than do non-media professionals.

  3. Comparison of three orientation and mobility aids for individuals with blindness: Verbal description, audio-tactile map and audio-haptic map.

    Science.gov (United States)

    Papadopoulos, Konstantinos; Koustriava, Eleni; Koukourikos, Panagiotis; Kartasidou, Lefkothea; Barouti, Marialena; Varveris, Asimis; Misiou, Marina; Zacharogeorga, Timoclia; Anastasiadis, Theocharis

    2017-01-01

    Disorientation and inability of wayfinding are phenomena with a great frequency for individuals with visual impairments during the process of travelling novel environments. Orientation and mobility aids could suggest important tools for the preparation of a more secure and cognitively mapped travelling. The aim of the present study was to examine if spatial knowledge structured after an individual with blindness had studied the map of an urban area that was delivered through a verbal description, an audio-tactile map or an audio-haptic map, could be used for detecting in the area specific points of interest. The effectiveness of the three aids with reference to each other was also examined. The results of the present study highlight the effectiveness of the audio-tactile and the audio-haptic maps as orientation and mobility aids, especially when these are compared to verbal descriptions.

  4. SOCIAL MEDIA

    National Research Council Canada - National Science Library

    Christine Weiser

    2013-01-01

      For the leaders assembled in the SchoolCIO working group, it seems the most successful implementations of social media use are found in those schools that recognize the importance of guiding students in their journey...

  5. Current Issues and Trends in Multidimensional Sensing Technologies for Digital Media

    Science.gov (United States)

    Nagata, Noriko; Ohki, Hidehiro; Kato, Kunihito; Koshimizu, Hiroyasu; Sagawa, Ryusuke; Fujiwara, Takayuki; Yamashita, Atsushi; Hashimoto, Manabu

    Multidimensional sensing (MDS) technologies have numerous applications in the field of digital media, including the development of audio and visual equipment for human-computer interaction (HCI) and manufacture of data storage devices; furthermore, MDS finds applications in the fields of medicine and marketing, i.e., in e-marketing and the development of diagnosis equipment.

  6. Media Overload in Instructional Web Pages and the Impact on Learning.

    Science.gov (United States)

    Hartley, Kendall W.

    1999-01-01

    Discussion of the use of the Internet to deliver instruction and multimedia opportunities for Web-page design focuses on working memory and its implications for Web-based instruction. Topics include media overload; cognitive load theory; static visual displays; animations; audio; and research questions. (Author/LRW)

  7. From Augmentation Media to Meme Media.

    Science.gov (United States)

    Tanaka, Yuzuru

    Computers as meta media are now evolving from augmentation media vehicles to meme media vehicles. While an augmentation media system provides a seamlessly integrated environment of various tools and documents, meme media system provides further functions to edit and distribute tools and documents. Documents and tools on meme media can easily…

  8. Community Media: Muting the Democratic Media Discourse?

    NARCIS (Netherlands)

    Carpentier, N.; Lie, R.; Servaes, J.

    2003-01-01

    Focuses on the concept of community media. Components that construct the identity of community media; Multi-theoretical approaches for analysis of community media; Definition of community media based on the concept of alternative media; Link between community media and civil society; Problems faced

  9. Media Bias

    OpenAIRE

    Sendhil Mullainathan; Andrei Shleifer

    2002-01-01

    There are two different types of media bias. One bias, which we refer to as ideology, reflects a news outlet's desire to affect reader opinions in a particular direction. The second bias, which we refer to as spin, reflects the outlet's attempt to simply create a memorable story. We examine competition among media outlets in the presence of these biases. Whereas competition can eliminate the effect of ideological bias, it actually exaggerates the incentive to spin stories.

  10. Event-based media processing and analysis: A survey of the literature

    OpenAIRE

    Tzelepis, Christos; Ma, Zhigang; MEZARIS, Vasileios; Ionescu, Bogdan; Kompatsiaris, Ioannis; Boato, Giulia; Sebe, Nicu; Yan, Shuicheng

    2016-01-01

    Research on event-based processing and analysis of media is receiving an increasing attention from the scientific community due to its relevance for an abundance of applications, from consumer video management and video surveillance to lifelogging and social media. Events have the ability to semantically encode relationships of different informational modalities, such as visual-audio-text, time, involved agents and objects, with the spatio-temporal component of events being a key feature for ...

  11. Understanding Cognitive Engagement in Online Discussion: Use of a Scaffolded, Audio-Based Argumentation Activity

    Science.gov (United States)

    Oh, Eunjung Grace; Kim, Hyun Song

    2016-01-01

    The purpose of this paper is to explore how adult learners engage in asynchronous online discussion through the implementation of an audio-based argumentation activity. The study designed scaffolded audio-based argumentation activities to promote students' cognitive engagement. The research was conducted in an online graduate course at a liberal…

  12. Audio-visual Classification and Fusion of Spontaneous Affect Data in Likelihood Space

    NARCIS (Netherlands)

    Nicolaou, Mihalis A.; Gunes, Hatice; Pantic, Maja

    2010-01-01

    This paper focuses on audio-visual (using facial expression, shoulder and audio cues) classification of spontaneous affect, utilising generative models for classification (i) in terms of Maximum Likelihood Classification with the assumption that the generative model structure in the classifier is

  13. Planning Schools for Use of Audio-Visual Materials. No. 1--Classrooms, 3rd Edition.

    Science.gov (United States)

    National Education Association, Washington, DC.

    Intended to inform school board administrators and teachers of the current (1958) thinking on audio-visual instruction for use in planning new buildings, purchasing equipment, and planning instruction. Attention is given the problem of overcoming obstacles to the incorporation of audio-visual materials into the curriculum. Discussion includes--(1)…

  14. Reaching Out: The Role of Audio Cassette Communication in Rural Development. Occasional Paper 19.

    Science.gov (United States)

    Adhikarya, Ronny; Colle, Royal D.

    This report describes the state-of-the-art of audio cassette technology (ACT) and reports findings from field tests, case studies, and pilot projects in several countries which demonstrate the potential of audio cassettes as a medium for communicating with rural people. Specific guidance is also offered on how a project can use cassettes as a…

  15. Reasons to Rethink the Use of Audio and Video Lectures in Online Courses

    Science.gov (United States)

    Stetz, Thomas A.; Bauman, Antonina A.

    2013-01-01

    Recent technological developments allow any instructor to create audio and video lectures for the use in online classes. However, it is questionable if it is worth the time and effort that faculty put into preparing those lectures. This paper presents thirteen factors that should be considered before preparing and using audio and video lectures in…

  16. 47 CFR 73.4275 - Tone clusters; audio attention-getting devices.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Tone clusters; audio attention-getting devices. 73.4275 Section 73.4275 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST... clusters; audio attention-getting devices. See Public Notice, FCC 76-610, dated July 2, 1976. 60 FCC 2d 920...

  17. Self-oscillating modulators for direct energy conversion audio power amplifiers

    DEFF Research Database (Denmark)

    Ljusev, Petar; Andersen, Michael Andreas E.

    2005-01-01

    Direct energy conversion audio power amplifier represents total integration of switching-mode power supply and Class D audio power amplifier into one compact stage, achieving high efficiency, high level of integration, low component count and eventually low cost. This paper presents how self...

  18. Investigating Expectations and Experiences of Audio and Written Assignment Feedback in First-Year Undergraduate Students

    Science.gov (United States)

    Fawcett, Hannah; Oldfield, Jeremy

    2016-01-01

    Previous research suggests that audio feedback may be an important mechanism for facilitating effective and timely assignment feedback. The present study examined expectations and experiences of audio and written feedback provided through "turnitin for iPad®" from students within the same cohort and assignment. The results showed that…

  19. Quick Response (QR) Codes for Audio Support in Foreign Language Learning

    Science.gov (United States)

    Vigil, Kathleen Murray

    2017-01-01

    This study explored the potential benefits and barriers of using quick response (QR) codes as a means by which to provide audio materials to middle-school students learning Spanish as a foreign language. Eleven teachers of Spanish to middle-school students created transmedia materials containing QR codes linking to audio resources. Students…

  20. Development of an Estimation Model for Instantaneous Presence in Audio-Visual Content

    National Research Council Canada - National Science Library

    OZAWA, Kenji; TSUKAHARA, Shota; KINOSHITA, Yuichiro; MORISE, Masanori

    2016-01-01

    ...: system presence and content presence. In this study we focused on content presence. To estimate the overall presence of a content item, we have developed estimation models for the sense of presence in audio-only and audio-visual content...

  1. 78 FR 18416 - Sixth Meeting: RTCA Special Committee 226, Audio Systems and Equipment

    Science.gov (United States)

    2013-03-26

    ... Federal Aviation Administration Sixth Meeting: RTCA Special Committee 226, Audio Systems and Equipment... Notice of RTCA Special Committee 226, Audio Systems and Equipment. SUMMARY: The FAA is issuing this... Equipment. DATES: The meeting will be held April 15-17, 2013 from 9:00 a.m.-5:00 p.m. ADDRESSES: The meeting...

  2. 77 FR 37733 - Third Meeting: RTCA Special Committee 226, Audio Systems and Equipment

    Science.gov (United States)

    2012-06-22

    ... Federal Aviation Administration Third Meeting: RTCA Special Committee 226, Audio Systems and Equipment... Notice of RTCA Special Committee 226, Audio Systems and Equipment. SUMMARY: The FAA is issuing this... Equipment. DATES: The meeting will be held July 10-12, 2012, from 9 a.m.-5 p.m. ADDRESSES: The meeting will...

  3. 78 FR 57673 - Eighth Meeting: RTCA Special Committee 226, Audio Systems and Equipment

    Science.gov (United States)

    2013-09-19

    ... Federal Aviation Administration Eighth Meeting: RTCA Special Committee 226, Audio Systems and Equipment... Notice of RTCA Special Committee 226, Audio Systems and Equipment. SUMMARY: The FAA is issuing this... Equipment. DATES: The meeting will be held October 8-10, 2012 from 9:00 a.m.-5:00 p.m. ADDRESSES: The...

  4. 77 FR 58209 - Fourth Meeting: RTCA Special Committee 226, Audio Systems and Equipment

    Science.gov (United States)

    2012-09-19

    ... Federal Aviation Administration Fourth Meeting: RTCA Special Committee 226, Audio Systems and Equipment... notice of RTCA Special Committee 226, Audio Systems and Equipment. SUMMARY: The FAA is issuing this... Equipment. DATES: The meeting will be held October 16-18, 2012 from 9 a.m.-5 p.m. ADDRESSES: The meeting...

  5. Culture through comparison: creating audio-visual listening materials for a CLIL course

    National Research Council Canada - National Science Library

    Zhyrun, Iryna

    2016-01-01

    ... of audio-visual materials design for listening comprehension taking into consideration educational and cultural contexts, course content, and language learning outcomes of the program. In addition, it discusses advantages and limitations of created audio-visual materials by contrasting them with authentic materials of similar type foun...

  6. Conflicting audio-haptic feedback in physically based simulation of walking sounds

    DEFF Research Database (Denmark)

    Turchet, Luca; Serafin, Stefania; Dimitrov, Smilen

    2010-01-01

    We describe an audio-haptic experiment conducted using a system which simulates in real-time the auditory and haptic sensation of walking on different surfaces. The system is based on physical models, that drive both the haptic and audio synthesizers, and a pair of shoes enhanced with sensors...

  7. 372 Audio Books in the Nigerian Higher Educational System: To be ...

    African Journals Online (AJOL)

    Nekky Umera

    Oyewusi, L. M. - Department of Educational Technology, Obafemi. Awolowo University, Ile-Ife. E-mail: oyewusilawunmi@yahoo.com. Abstract. This study discusses audio books from the point of view of an innovation. It discusses the advantages and disadvantages of audio books. It examined students' familiarization with ...

  8. An Analog I/O Interface Board for Audio Arduino Open Sound Card System

    DEFF Research Database (Denmark)

    Dimitrov, Smilen; Serafin, Stefania

    2011-01-01

    AudioArduino [1] is a system consisting of an ALSA (Advanced Linux Sound Architecture) audio driver and corresponding microcontroller code; that can demonstrate full-duplex, mono, 8-bit, 44.1 kHz soundcard behavior on an FTDI based Arduino. While the basic operation as a soundcard can...

  9. Audio-video decision support for patients: the documentary genre as a basis for decision aids

    NARCIS (Netherlands)

    Volandes, A.E.; Barry, M.J.; Wood, F.; Elwyn, G.

    2013-01-01

    Objective Decision support tools are increasingly using audio-visual materials. However, disagreement exists about the use of audio-visual materials as they may be subjective and biased. Methods This is a literature review of the major texts for documentary film studies to extrapolate issues of

  10. A comparative study on automatic audio-visual fusion for aggression detection using meta-information

    NARCIS (Netherlands)

    Lefter, I.; Rothkrantz, L.J.M.; Burghouts, G.J.

    2013-01-01

    Multimodal fusion is a complex topic. For surveillance applications audio-visual fusion is very promising given the complementary nature of the two streams. However, drawing the correct conclusion from multi-sensor data is not straightforward. In previous work we have analysed a database with audio-

  11. An Exploratory Evaluation of User Interfaces for 3D Audio Mixing

    DEFF Research Database (Denmark)

    Gelineck, Steven; Korsgaard, Dannie Michael

    2015-01-01

    The paper presents an exploratory evaluation comparing different versions of a mid-air gesture based interface for mixing 3D audio exploring: (1) how such an interface generally compares to a more traditional physical interface, (2) methods for grabbing/releasing audio channels in mid-air and (3)...

  12. IYA: Using New Media to Reach Broad Audiences

    Science.gov (United States)

    Gay, Pamela L.; IYA New Media Working Group

    2007-12-01

    The International Year of Astronomy New Media Working Group (IYA NMWG) seeks to flood the Internet with ways to learn about astronomy and increase interaction among professionals, amateurs, and laypeople. Our primary audiences are amateur astronomers, astronomy and space enthusiasts, and image lovers, but secondary audiences include science fiction fans, online gamers, and skeptics. We aim to build lasting programs and partnerships that will continue beyond 2009. Our weapon of choice is New Media. New Media differ from traditional media (such as television, radio, and print) in their informality. Many forms of New Media start as user-provided content. New Media content-building infrastructures answer the content provider's creative whims, and New-Media content can be commented upon, shared, borrowed, adopted, edited, and re-posted by a broad audience. Classic examples of New Media include blogs and podcasts. This media is typically distributed through content-specific websites and RSS feeds, which allow individual Internet users to select preferred streams of media (including text, audio, and video) to be delivered to them automatically.

  13. A Novel Audio Cryptosystem Using Chaotic Maps and DNA Encoding

    Directory of Open Access Journals (Sweden)

    S. J. Sheela

    2017-01-01

    Full Text Available Chaotic maps have good potential in security applications due to their inherent characteristics relevant to cryptography. This paper introduces a new audio cryptosystem based on chaotic maps, hybrid chaotic shift transform (HCST, and deoxyribonucleic acid (DNA encoding rules. The scheme uses chaotic maps such as two-dimensional modified Henon map (2D-MHM and standard map. The 2D-MHM which has sophisticated chaotic behavior for an extensive range of control parameters is used to perform HCST. DNA encoding technology is used as an auxiliary tool which enhances the security of the cryptosystem. The performance of the algorithm is evaluated for various speech signals using different encryption/decryption quality metrics. The simulation and comparison results show that the algorithm can achieve good encryption results and is able to resist several cryptographic attacks. The various types of analysis revealed that the algorithm is suitable for narrow band radio communication and real-time speech encryption applications.

  14. A Smart Audio on Demand Application on Android Systems

    Directory of Open Access Journals (Sweden)

    Ing-Jr Ding

    2015-05-01

    Full Text Available This paper describes a study of the realization of intelligent Audio on Demand (AOD processing in the embedded system environment. This study describes the development of innovative Android software that will enhance user experience of the increasingly popular number of smart mobile devices now available on the market. The application we developed can accumulate records of the songs that are played and automatically analyze the favorite song types of a user. The application can also select sound control playback functions to make operation more convenient. A large number of different types of music genre were collected to create a sound database and build an intelligent AOD processing mechanism. Formant analysis was used to extract voice features and the K-means clustering method and acoustic modeling technology of the Gaussian mixture model (GMM were used to study and develop the application mechanism. The processes we developed run smoothly in the embedded Android platform.

  15. Music information retrieval in compressed audio files: a survey

    Science.gov (United States)

    Zampoglou, Markos; Malamos, Athanasios G.

    2014-07-01

    In this paper, we present an organized survey of the existing literature on music information retrieval systems in which descriptor features are extracted directly from the compressed audio files, without prior decompression to pulse-code modulation format. Avoiding the decompression step and utilizing the readily available compressed-domain information can significantly lighten the computational cost of a music information retrieval system, allowing application to large-scale music databases. We identify a number of systems relying on compressed-domain information and form a systematic classification of the features they extract, the retrieval tasks they tackle and the degree in which they achieve an actual increase in the overall speed-as well as any resulting loss in accuracy. Finally, we discuss recent developments in the field, and the potential research directions they open toward ultra-fast, scalable systems.

  16. Using Audio-Derived Affective Offset to Enhance TV Recommendation

    DEFF Research Database (Denmark)

    Shepstone, Sven Ewan; Tan, Zheng-Hua; Jensen, Søren Holdt

    2014-01-01

    , by navigating the emotion space to request an alternative match. The final match is then compared to the initial match, in terms of the difference in the items' affective parameterization . This offset is then utilized in future recommendation sessions. The system was evaluated by eliciting three different......This paper introduces the concept of affective offset, which is the difference between a user's perceived affective state and the affective annotation of the content they wish to see. We show how this affective offset can be used within a framework for providing recommendations for TV programs....... First a user's mood profile is determined using 12-class audio-based emotion classifications . An initial TV content item is then displayed to the user based on the extracted mood profile. The user has the option to either accept the recommendation, or to critique the item once or several times...

  17. Digital audio recordings improve the outcomes of patient consultations

    DEFF Research Database (Denmark)

    Wolderslund, Maiken; Kofoed, Poul-Erik; Holst, René

    2017-01-01

    OBJECTIVES: To investigate the effects on patients' outcome of the consultations when provided with: a Digital Audio Recording (DAR) of the consultation and a Question Prompt List (QPL). METHODS: This is a three-armed randomised controlled cluster trial. One group of patients received standard care......, while the other two groups received either the QPL in combination with a recording of their consultation or only the recording. Patients from four outpatient clinics participated: Paediatric, Orthopaedic, Internal Medicine, and Urology. The effects were evaluated by patient-administered questionnaires....... RESULTS: A total of 4349 patients participated in the study. DAR significantly increased the probability of fulfilling the participants' self-perceived information needs by 4.1% to 6.3%, particularly with regard to test results (OR=1.41, 95%CI: 1.14-1.74, p=0.001) and treatment options (OR=1.39, 95%CI: 1...

  18. Audio collection in the SASA Institute of Musicology

    Directory of Open Access Journals (Sweden)

    Lajić-Mihajlović Danka

    2010-01-01

    Full Text Available The paper is relating to audio collection of the Institute of Musicology SASA as extremely important part of this institution’s fund. The collection comprises of valuable sound materials, especially significant collections of fieldwork recordings of traditional folk and church music, as also recordings of pieces of the 19th and 20th century Serbian composers. Information on sound carriers, methodologies and circumstances in which the recordings have been made, their preservation and further treatment with modern technologies, are a part of ethnomusicological and musicological histories in Serbia. According to number of sound recordings, diachronical dimensions that encompass, geographical areas and genre diversity, this collection is one of the most important sound collections of scientific profile in Serbia.

  19. Audio-haptic-virtual Mona Lisa (The Blind and Painting

    Directory of Open Access Journals (Sweden)

    Aksinja Kermauner

    2014-03-01

    Full Text Available The purpose of the article is to explore in what ways the visual arts (with emphasis on painting can be brought closer to the blind in the postmodern society, in which sight is perceived to be the chief sense and in which most information is based on images. The basic methods of presenting a work of art involve the remaining senses, mostly those of hearing and touch. It is of course not enough just to deliver a factual description of a painting or to transform it into tactile graphics – more complex techniques such as audio-description, method of associations, participating in role-playing, all with the aim of a holistic experience of the work of art, must be sought instead. In the world of virtual reality, additional equipment for the blind (e.g., data gloves provides new opportunities.

  20. Using Touch Screen Audio-CASI to Obtain Data on Sensitive Topics.

    Science.gov (United States)

    Cooley, Philip C; Rogers, Susan M; Turner, Charles F; Al-Tayyib, Alia A; Willis, Gordon; Ganapathi, Laxminarayana

    2001-05-01

    This paper describes a new interview data collection system that uses a laptop personal computer equipped with a touch-sensitive video monitor. The touch-screen-based audio computer-assisted self-interviewing system, or touch screen audio-CASI, enhances the ease of use of conventional audio CASI systems while simultaneously providing the privacy of self-administered questionnaires. We describe touch screen audio-CASI design features and operational characteristics. In addition, we present data from a recent clinic-based experiment indicating that the touch audio-CASI system is stable, robust, and suitable for administering relatively long and complex questionnaires on sensitive topics, including drug use and sexual behaviors associated with HIV and other sexually transmitted diseases.

  1. Stress Reduction through Audio Distraction in Anxious Pediatric Dental Patients: An Adjunctive Clinical Study.

    Science.gov (United States)

    Singh, Divya; Samadi, Firoza; Jaiswal, Jn; Tripathi, Abhay Mani

    2014-01-01

    The purpose of the present study was to evaluate the eff-cacy of 'audio distraction' in anxious pediatric dental patients. Sixty children were randomly selected and equally divided into two groups of thirty each. The first group was control group (group A) and the second group was music group (group B). The dental procedure employed was extraction for both the groups. The children included in music group were allowed to hear audio presentation throughout the treatment procedure. Anxiety was measured by using Venham's picture test, pulse rate, blood pressure and oxygen saturation. 'Audio distraction' was found efficacious in alleviating anxiety of pediatric dental patients. 'Audio distraction' did decrease the anxiety in pediatric patients to a significant extent. How to cite this article: Singh D, Samadi F, Jaiswal JN, Tripathi AM. Stress Reduction through Audio Distraction in Anxious Pediatric Dental Patients: An Adjunctive Clinical Study. Int J Clin Pediatr Dent 2014;7(3):149-152.

  2. Environment Recognition for Digital Audio Forensics Using MPEG-7 and MEL Cepstral Features

    Science.gov (United States)

    Muhammad, Ghulam; Alghathbar, Khalid

    2011-07-01

    Environment recognition from digital audio for forensics application is a growing area of interest. However, compared to other branches of audio forensics, it is a less researched one. Especially less attention has been given to detect environment from files where foreground speech is present, which is a forensics scenario. In this paper, we perform several experiments focusing on the problems of environment recognition from audio particularly for forensics application. Experimental results show that the task is easier when audio files contain only environmental sound than when they contain both foreground speech and background environment. We propose a full set of MPEG-7 audio features combined with mel frequency cepstral coefficients (MFCCs) to improve the accuracy. In the experiments, the proposed approach significantly increases the recognition accuracy of environment sound even in the presence of high amount of foreground human speech.

  3. Direct-conversion switching-mode audio power amplifier with active capacitive voltage clamp

    DEFF Research Database (Denmark)

    Ljusev, Petar; Andersen, Michael Andreas E.

    2005-01-01

    This paper discusses the advantages and problems when implementing direct energy conversion switching-mode audio power amplifiers. It is shown that the total integration of the power supply and Class D audio power amplifier into one compact direct converter can simplify the design, increase effic...... efficiency, reduce the product volume and lower its cost. As an example, the principle of operation and the measurements made on a direct-conversion switching-mode audio power amplifier with active capacitive voltage clamp are presented.......This paper discusses the advantages and problems when implementing direct energy conversion switching-mode audio power amplifiers. It is shown that the total integration of the power supply and Class D audio power amplifier into one compact direct converter can simplify the design, increase...

  4. Implementasi Teknik Watermarking menggunakan FFT dan Spread Spectrum Watermark pada Data Audio Digital

    Directory of Open Access Journals (Sweden)

    HANNAN HARAHAP

    2016-02-01

    Full Text Available ABSTRAK Penggunaan teknologi dan internet yang berkembang dengan pesat menyebabkan banyak pemalsuan dan penyebaran yang tidak sah terhadap data digital. Oleh karena itu, sangat diperlukan suatu teknologi yang dapat melindungi hak cipta data multimedia seperti audio. Teknik yang sering digunakan dalam perlindungan hak cipta adalah watermarking karena teknik ini memiliki tiga kriteria utama dalam keamanan data, yaitu robustness, imperceptibility, dan safety. Untuk itu, pada penelitian ini dirancang suatu skema yang dapat melindungi hak cipta data audio. Metode yang digunakan adalah Fast Fourier Transform, yang mengubah data audio asli ke dalam domain frekuensi sebelum dilakukan proses penyisipan watermark dan proses ekstraksi watermark. Watermark disebar pada komponen yang paling signifikan dari spektrum magnitude audio host. Teknik watermarking pada penelitian ini dapat menghasilkan Signal-to-Noise Ratio di atas 20 dB dan Bit Error Rate di bawah 5%. Kata kunci: Audio watermarking, Copyright Protection, Fast Fourier Transform, Spektrum magnitude ABSTRACT The use of technology and internet has grown rapidly that causes a lot of forgery and illegal proliferation of digital data. It needs a technology that can protect the copyright of multimedia data such as audio. The most common technique in copyright protection is watermarking because it has three main criteria in data security: robustness, imperceptibility, and safety. This research created a scheme that can protect a copyright of audio data. The method that we used is Fast Fourier Transform. This method changes the original audio data into frequency domain before the embedding and extraction process. The watermark is spread into the most significant component of the magnitude spectrum of audio host. This technique obtains Signal-to-Noise Ratio above 20 dB and Bit Error Rate below 5%. Keywords: Audio watermarking, Copyright Protection, Fast Fourier Transform, Magnitude spectrum

  5. Social media management and media environment

    OpenAIRE

    Šiđanin Iva

    2012-01-01

    The paper deals with the system of services that social media management can offer to a variety of users. As social media systems are emerging, social media management can strengthen teams in social media and help to manage numerous social channels and distribution of social information from one place. Social media management is a system of procedures that are used to manage the flow of information in the environment of social media. This involves connecting with social media like Facebook, T...

  6. KAMAN PELAYANAN MEDIA AUDIOVISUAL: STUDI KASUS DI THE BRITISH COUNCIL JAKARTA

    Directory of Open Access Journals (Sweden)

    Hindar Purnomo

    2015-12-01

    Full Text Available Tujuan penelitian ini adalah untuk mengetahui cara penyelenggaraan pelayanan media AV, efektivitas pelayanan serta tingkat kepuasan pemustaka terhadap berbagai aspek pelayanan. Penelitian dilakukan di The British Council Jakarta dengan cara evaluasi karena dengan cara ini dapat diketahui berbagai fenomena yang terjadi. Perpustakaan British Council menyediakan tiga jenis media yaitu berupa kaset video, kaset audio, dan siaran televisi BBC. Subjek penelitian adalah pemakai jasa pelaya-nan media audiovisual yang terdaftar sebagai anggota. Subjek dikelompokkan berdasarkan kelompok usia dan kelompok tujuan pemanfaatan media AV. Data angket terkumpul sebanyak 157 responden (75,48% kemudian dianalisis secara statistik dengan uji analisis varian sate arah Kruskal-Wallis. Hasil penelitian menunjukkan bahwa ketiga media tersebut diminati oleh banyak pemakai terutama pada kelompok usia muda. Sebagian besar pemustaka lebih menyukai jenis fiksi dibandingkan jenis nonfiksi, mereka menggunakan media audiovisual untuk mencari informasi pengetahuan. Pelayanan media audiovisual terbukti sangat efektif dilihat dari angka keterpakaian koleksi maupun tingkat kepuasan pemakain. Hasil uji hipotesis menunjukkan bahwa antarkelompok usia maupun tujuan kegunaan tidak ada perbedaan yang berarti dalam menanggapi berbagai aspek pelayanan media audiovisual. Kata Kunci: MediaAudio Visual-Layanan Perpustakaan

  7. Media Training

    CERN Multimedia

    CERN. Geneva

    2009-01-01

    With the LHC starting up soon, the world's media are again turning their attention to CERN. We're all likely to be called upon to explain what is happening at CERN to media, friends and neighbours. The seminar will be given by BBC television news journalists Liz Pike and Nadia Marchant, and will deal with the kind of questions we're likely to be confronted with through the restart period. The training is open for everybody. Make sure you arrive early enough to get a seat - there are only 200 seats in the Globe. The session will also be webcast: http://webcast.cern.ch/

  8. Transana Qualitative Video and Audio Analysis Software as a Tool for Teaching Intellectual Assessment Skills to Graduate Psychology Students

    Science.gov (United States)

    Rush, S. Craig

    2014-01-01

    This article draws on the author's experience using qualitative video and audio analysis, most notably through use of the Transana qualitative video and audio analysis software program, as an alternative method for teaching IQ administration skills to students in a graduate psychology program. Qualitative video and audio analysis may be useful for…

  9. Impact of audio narrated animation on students' understanding and learning environment based on gender

    Science.gov (United States)

    Nasrudin, Ajeng Ratih; Setiawan, Wawan; Sanjaya, Yayan

    2017-05-01

    This study is titled the impact of audio narrated animation on students' understanding in learning humanrespiratory system based on gender. This study was conducted in eight grade of junior high school. This study aims to investigate the difference of students' understanding and learning environment at boys and girls classes in learning human respiratory system using audio narrated animation. Research method that is used is quasy experiment with matching pre-test post-test comparison group design. The procedures of study are: (1) preliminary study and learning habituation using audio narrated animation; (2) implementation of learning using audio narrated animation and taking data; (3) analysis and discussion. The result of analysis shows that there is significant difference on students' understanding and learning environment at boys and girls classes in learning human respiratory system using audio narrated animation, both in general and specifically in achieving learning indicators. The discussion related to the impact of audio narrated animation, gender characteristics, and constructivist learning environment. It can be concluded that there is significant difference of students' understanding at boys and girls classes in learning human respiratory system using audio narrated animation. Additionally, based on interpretation of students' respond, there is the difference increment of agreement level in learning environment.

  10. Local Control of Audio Environment: A Review of Methods and Applications

    Directory of Open Access Journals (Sweden)

    Jussi Kuutti

    2014-02-01

    Full Text Available The concept of a local audio environment is to have sound playback locally restricted such that, ideally, adjacent regions of an indoor or outdoor space could exhibit their own individual audio content without interfering with each other. This would enable people to listen to their content of choice without disturbing others next to them, yet, without any headphones to block conversation. In practice, perfect sound containment in free air cannot be attained, but a local audio environment can still be satisfactorily approximated using directional speakers. Directional speakers may be based on regular audible frequencies or they may employ modulated ultrasound. Planar, parabolic, and array form factors are commonly used. The directivity of a speaker improves as its surface area and sound frequency increases, making these the main design factors for directional audio systems. Even directional speakers radiate some sound outside the main beam, and sound can also reflect from objects. Therefore, directional speaker systems perform best when there is enough ambient noise to mask the leaking sound. Possible areas of application for local audio include information and advertisement audio feed in commercial facilities, guiding and narration in museums and exhibitions, office space personalization, control room messaging, rehabilitation environments, and entertainment audio systems.

  11. Laboratory and in-flight experiments to evaluate 3-D audio display technology

    Science.gov (United States)

    Ericson, Mark; Mckinley, Richard; Kibbe, Marion; Francis, Daniel

    1994-01-01

    Laboratory and in-flight experiments were conducted to evaluate 3-D audio display technology for cockpit applications. A 3-D audio display generator was developed which digitally encodes naturally occurring direction information onto any audio signal and presents the binaural sound over headphones. The acoustic image is stabilized for head movement by use of an electromagnetic head-tracking device. In the laboratory, a 3-D audio display generator was used to spatially separate competing speech messages to improve the intelligibility of each message. Up to a 25 percent improvement in intelligibility was measured for spatially separated speech at high ambient noise levels (115 dB SPL). During the in-flight experiments, pilots reported that spatial separation of speech communications provided a noticeable improvement in intelligibility. The use of 3-D audio for target acquisition was also investigated. In the laboratory, 3-D audio enabled the acquisition of visual targets in about two seconds average response time at 17 degrees accuracy. During the in-flight experiments, pilots correctly identified ground targets 50, 75, and 100 percent of the time at separation angles of 12, 20, and 35 degrees, respectively. In general, pilot performance in the field with the 3-D audio display generator was as expected, based on data from laboratory experiments.

  12. Otitis media

    NARCIS (Netherlands)

    Rovers, MM; Schilder, AGM; Zielhuis, GA; Rosenfeld, RM

    2004-01-01

    Otitis media (OM) continues to be one of the most common childhood infections and is a major cause of morbidity in children. The pathogenesis of OM is multifactorial, involving the adaptive and native immune system, Eustachian-tube dysfunction, viral and bacterial load, and genetic and environmental

  13. Social Media

    Science.gov (United States)

    2010-05-01

    Digital Marketing and Ecommerce Professionals. 29 January 2010. 20 May 2010. <http://econsultancy.com/blog/5324-20+-mind-blowing-social- media...Statistics Revisited.” Econsultancy | Community of Digital Marketing and Ecommerce Professionals. 29 Jan. 2010. 20 May 2010. <http://econsultancy.com/blog

  14. Streaming Media

    Science.gov (United States)

    Pulley, John

    2009-01-01

    At a time when the evolutionary pace of new media resembles the real-time mutation of certain microorganisms, the age-old question of how best to connect with constituents can seem impossibly complex--even for an elite institution plugged into the motherboard of Silicon Valley. Identifying the most effective vehicle for reaching a particular…

  15. Transmisión de audio usando redes Zigbee

    Directory of Open Access Journals (Sweden)

    David Delgado León

    2011-03-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Zigbee es un protocolo de comunicaciones basado en el estándar para redes inalámbricas IEEE_802.15.4. Concebido para el control y la monitorización de redes de sensores tanto en entornos industriales, médicos, como domóticos, ha existido un creciente interés por evaluarlo en aplicaciones de multimedia. Aun sin garantizar QoS (Quality of service por su limitado ancho de banda existen un conjunto de aplicaciones para vigilancia, grupos de rescate y salvamento, seguridad en entornos domóticos, grupos desplegados en un área limitada con necesidad de comunicación donde un sistema de audio y video en tiempo real de bajo costo basado en tecnología Zigbee es una idea sumamente atractiva.   Se presenta el diseño de un sistema que permita la comunicación de un grupo de usuarios desplegadas en un área limitada. Utiliza Microcontroladores RISC y tecnología Zigbee. Se investiga la factibilidad de usar la tecnología Zigbee para la transmisión de audio, se analizan

  16. Design And Construction Of 300W Audio Power Amplifier For Classroom

    Directory of Open Access Journals (Sweden)

    Shune Lei Aung

    2015-07-01

    Full Text Available Abstract This paper describes the design and construction of 300W audio power amplifier for classroom. In the construction of this amplifier microphone preamplifier tone preamplifier equalizer line amplifier output power amplifier and sound level indicator are included. The output power amplifier is designed as O.C.L system and constructed by using Class B among many types of amplifier classes. There are two types in O.C.L system quasi system and complementary system. Between them the complementary system is used in the construction of 300W audio power amplifier. The Multisim software is utilized for the construction of audio power amplifier.

  17. A New Principle for a High Efficiency Power Audio Amplifier for Use with a Digital Preamplifier

    DEFF Research Database (Denmark)

    Jensen, Jørgen Arendt

    1986-01-01

    The use of class-B and class-D amlifiers for converting digital audio signals to analog signals is discussed. It is shown that the class-D amplifier is unsuitable due to distortion. Therefore, a new principle involving a switch-mode power supply and a class-B amplifier is suggested. By regulating...... the supply voltage to the amplifier according to the amplitude of the audio signal, a higher efficiency than can be obtained by the current principles is achieved. The regulation can be done very efficiently by generating the control signal to the power supply in advance of the audio signal, made possible...

  18. Self-oscillating modulators for direct energy conversion audio power amplifiers

    Energy Technology Data Exchange (ETDEWEB)

    Ljusev, P.; Andersen, Michael A.E.

    2005-07-01

    Direct energy conversion audio power amplifier represents total integration of switching-mode power supply and Class D audio power amplifier into one compact stage, achieving high efficiency, high level of integration, low component count and eventually low cost. This paper presents how self-oscillating modulators can be used with the direct switching-mode audio power amplifier to improve its performance by providing fast hysteretic control with high power supply rejection ratio, open-loop stability and high bandwidth. Its operation is thoroughly analyzed and simulated waveforms of a prototype amplifier are presented. (au)

  19. Direct-conversion switching-mode audio power amplifier with active capacitive voltage clamp

    Energy Technology Data Exchange (ETDEWEB)

    Ljusev, P.; Andersen, Michael A.E.

    2005-07-01

    This paper discusses the advantages and problems when implementing direct energy conversion switching-mode audio power amplifiers. It is shown that the total integration of the power supply and Class D audio power amplifier into one compact direct converter can simplify design, increase efficiency and integration level, reduce product volume and lower its cost. As an example, the principle of operation and the measurements made on a direct-conversion switching-mode audio power amplifier with active capacitive voltage clamp are presented. (au)

  20. Extraction, Mapping, and Evaluation of Expressive Acoustic Features for Adaptive Digital Audio Effects

    DEFF Research Database (Denmark)

    Holfelt, Jonas; Csapo, Gergely; Andersson, Nikolaj Schwab

    2017-01-01

    perceptual sound descriptors for communicating emotions. This project was aiming to exploit sounds as expressive in- dicators to create novel sound transformations. A test was conducted to see if guitar players could differentiate be- tween an adaptive and non-adaptive version of a digital au- dio effect......This paper describes the design and implementation of a real-time adaptive digital audio effect with an emphasis on using expressive audio features that control effect param- eters. Research in adaptive digital audio effects is cov- ered along with studies about expressivity and important...