Search results for: SYGNAŁY AUDIO

• JOURNAL OF THE AUDIO ENGINEERING SOCIETY

  Journals

  ISSN: 1549-4950

• Kompresja wartości chwilowej sygnału - nowe podejście w analogowym przetwarzaniu sygnałów

  Publication

  • W. Jendernalik

  - Elektronika : konstrukcje, technologie, zastosowania - Year 2007

  Obecnie, w elektronice występuje silny trend w kierunku obniżenia napięć zasilania urządzeń. Jest to wymuszone tym, iż wiele z tych urządzeń jest przenośnych i zasilanych bateryjnie, na przykład telefony komórkowe. Aby efektywnie wydłużyć czas pracy baterii, pobór mocy urządzenia musi zostać obniżony. Jakkolwiek, niskie napięcie zasilania powoduje znaczne utrudnienia w przetwarzaniu sygnałów analogowych. Amplitudy przetwarzanych...

• EXAMINING INFLUENCE OF VIDEO FRAMERATE AND AUDIO/VIDEO SYNCHRONIZATION ON AUDIO-VISUAL SPEECH RECOGNITION ACCURACY

  Publication

  • P. Bratoszewski
  • K. Łopatka
  • A. Czyżewski

  - Year 2014

  The problem of video framerate and audio/video synchronization in audio-visual speech recognition is considered. The visual features are added to the acoustic parameters in order to improve the accuracy of speech recognition in noisy conditions. The Mel-Frequency Cepstral Coefficients are used on the acoustic side whereas Active Appearance Model features are extracted from the image. The feature fusion approach is employed. The...

• EXAMINING INFLUENCE OF VIDEO FRAMERATE AND AUDIO/VIDEO SYNCHRONIZATION ON AUDIO-VISUAL SPEECH RECOGNITION ACCURACY

  Publication

  • P. Bratoszewski
  • K. Łopatka
  • A. Czyżewski

  - Year 2014

  The problem of video framerate and audio/video synchronization in audio-visual speech recogni-tion is considered. The visual features are added to the acoustic parameters in order to improve the accuracy of speech recognition in noisy conditions. The Mel-Frequency Cepstral Coefficients are used on the acoustic side whereas Active Appearance Model features are extracted from the image. The feature fusion approach is employed. The...

• Bożena Kostek prof. dr hab. inż.

  People

  Laboratorium Akustyki Fonicznej

• Retrospecting Polish Audio Engineering Society Membership on 20th Anniversary of the Polish Section of the Audio Engineering Society

  Publication

  • B. Kostek
  • M. Sankiewicz

  - Archives of Acoustics - Year 2011

  In this article some key events concerning founding Polish Section of the Audio Engineering Society were presented. In addition, the history covering International Symposia on Sound Engineering and Mastering was outlined. Also, papers contained in this issue were shortly reviewed.

  Full text available to download

• Objectivization of Audio-Visual Correlation analysis

  Publication

  • B. Kunka
  • B. Kostek

  - Archives of Acoustics - Year 2012

  Simultaneous perception of audio and visual stimuli often causes the concealment or misrepresentation of information actually contained in these stimuli. Such effects are called the ''image proximity effect'' or the ''ventriloquism effect'' in literature. Until recently, most research carried out to understand their nature was based on subjective assessments. The Authors of this paper propose a methodology based on both subjective...

  Full text available to download

• Automatic audio-visual threat detection

  Publication

  • J. Kotus
  • J. Łopatka
  • K. Kopaczewski
  • A. Czyżewski

  - Year 2010

  The concept, practical realization and application of a system for detection and classification of hazardous situations based on multimodal sound and vision analysis are presented. The device consists of new kind multichannel miniature sound intensity sensors, digital Pan Tilt Zoom and fixed cameras and a bundle of signal processing algorithms. The simultaneous analysis of multimodal signals can significantly improve the accuracy...

• Measurement of Latency in the Android Audio Path

  Publication

  • M. Blaszke
  • D. Weber
  • S. Zaporowski

  - Year 2018

  This paper provides a description of experimental investigations concerning comparison between the audio path characteristics of various Android versions. First, information about the changes in each system version in the context of latency caused by them is presented. Then, a measurement procedure employing available applications to measure latency is described comparing to results contained in the Internet. Finally, a comparison...

  Full text to download in external service

• Automatic system for audio-video material reconstruction and archiving

  Publication

  • A. Kupryjanow
  • A. Czyżewski

  - Year 2008

  Referat przedstawia propozycję modelu systemu automatycznej archiwizacji i rekonstrukcji nagrań audio-wideo. Założeniem tego rozwiązania jest uczynienie procesu rekonstrukcji nagrań bardziej niezależnym od człowieka. Ma to na celu redukcję kosztów rekonstrukcji przetwarzanych nagrań. Z powodu dużej liczby archiwalnych nagrań audio-wideo istnieje potrzeba stworzenia systemu który umożliwi automatyczną indeksację ich treści. Pomoże...