JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (3): 42-45.

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Sub-sampling in flat delay estimation with application to an acoustic
 echo cancellation system

WANG Xin-yi1, DU Guang2*   

  1. 1. Communication Examination Department, State Intellectual Property Office of People′s Republic of China,
    Beijing 100088, China;  2. Software College,Shandong University, Jinan 250101, China
  • Received:2011-03-28 Online:2011-06-16 Published:2011-03-28

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Abstract:

 A sub-sampling flat delay estimation algorithm was proposed. The proposed algorithm performed speech signal whitening and desampling before the delay estimation. This arithmetic could effectively suppress the side lobe of the generalized crosscorrelation function  and could overcome the robust problem in the conventional time delay estimation algorithm based on the generalized cross-correlation function. Finally, an acoustic echo cancellation system was designed with the proposed flat delay estimation module. Computer simulation showed that the proposed algorithm performed better than the conventional one.

Key words:  speech signal processing, echo cancellation, flat delay estimation, desampling filter, generalized cross-correlation

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