Sökning: "Echo Cancellation"

Visar resultat 11 - 15 av 23 uppsatser innehållade orden Echo Cancellation.

  1. 11. Methods and algorithms for quality and performance evaluation of audio conferencing systems

    Master-uppsats, Institutionen för fysik

    Författare :Maria Palmqvist; [2013]
    Nyckelord :AEC; loudspeaker performance; audio conferencing systems; PESQ; MOS; THD; ERLE; CSD;

    Sammanfattning : In an audio conferencing system the sound from the loudspeaker is undesirably picked up by the microphone. This introduces echoes to the system. To remove the echoes an acoustic echo canceller can be built with an adaptive filter. LÄS MER

  3. 12. Performance analysis of different adapative algorithms based on acoustic echo cancellation

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Nagaswaroopa Adapa; Sravya Bollu; [2013]
    Nyckelord :Echo Cancellation; Adaptive algorithms; Noise Cancellation; Reverberation; Room Impulse Response; Adaptive filters;

    Sammanfattning : In modern telecommunication systems like hands-free and teleconferencing systems, the problem arise during conversation is the creation of an acoustic echo. This problem degrades the quality of the information signal. LÄS MER

  4. 13. BINAURAL HEARING PLATFORM FOR FUTURE HEARING AID RESEARCH : Implementation in Matlab Audio Processing framework

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :ABEL GLADSTONE MANGAM; [2012]
    Nyckelord :Acoustics; Acoustic signal detection Acoustic signal processing; Microphone arrays; Hearing aids; Speaker Localization;

    Sammanfattning : Binaural technology is used to recreate realistic sound to the listener. How- ever, many signal processing and noise cancellation techniques do not pre- serve the binaural characteristics of the binaural sound and thus destroying the realism. LÄS MER

  5. 14. Utvärdering av mikrofon- och högtalarelement för högtalartelefonsapplikation

    Uppsats för yrkesexamina på grundnivå, Institutionen för tillämpad fysik och elektronik

    Författare :Albin Flyckt; [2012]
    Nyckelord :;

    Sammanfattning : The project deals with the evaluation and testing of speaker and microphone elements as well as microphone cavity.The first part of the report comprises a comprehensive theoretical part about drivers, microphone elements, and to some extent microphone cavity. LÄS MER

  7. 15. Acoustic Echo cancellation inside a Conference Room using Adaptive Algorithms

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Gannamaneni Geetha Chowdary; [2012]
    Nyckelord :Acoustic echo cancellation; Room modeling; Reverberation time; Signal to noise ratio; Echo return loss enhancement;

    Sammanfattning : The whole dimension of communications has been changed by the rapid growth of technology. Today people are more interested in hands-free com-mucation, which makes use of loud speaker and high gain microphone, in place of the old modeled wired telephone. LÄS MER