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  • A New Post-Filtering Algorithm for Residual Acoustic Echo Cancellation in Hands-Free Mobile Application

    Sangki KANG  Seong-Joon BAEK  

     
    LETTER

      Vol:
    E87-B No:5
      Page(s):
    1266-1269

    We consider a new post-filtering algorithm for residual acoustic echo cancellation in hands-free application. The new post-filtering algorithm is composed of AR analysis, pitch prediction, and noise reduction algorithm. The residual acoustic echo is whitened via AR analysis and pitch prediction during no near-end talker period and then is cancelled by noise reduction algorithm. By removing speech characteristics of the residual acoustic echo, noise reduction algorithm reduces the power of the residual acoustic echo as well as the ambient noise. For the hands-free application in the moving car, the proposed system attenuated the interferences more than 15 dB at a constant speed of 80 km/h.