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http://dx.doi.org/10.6109/jkiice.2012.16.2.237

An Acoustic Echo Canceller for Double-talk by Blind Signal Separation  

Lee, Haeng-Woo (남서울대학교)
Yun, Hyun-Min (재능대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.16, no.2, 2012 , pp. 237-245 More about this Journal
Abstract
This paper describes an acoustic echo canceller with double-talk by the blind signal separation. The acoustic echo canceller is deteriorated or diverged in the double-talk period. So we use the blind signal separation to estimate the near-end speech signal and to eliminate the estimated signal from the residual signal. The blind signal separation extracts the near-end signal with dual microphones by the iterative computations using the 2nd order statistical character. Because the mixture model of blind signal separation is multi-channel in the closed reverberation environment, we used the copied coefficients of echo canceller without computing the separation coefficients. By this method, the acoustic echo canceller operates irrespective of double-talking. We verified performances of the proposed acoustic echo canceller by simulations. The results show that the acoustic echo canceller with this algorithm detects the double-talk periods thoroughly, and then operates stably in the normal state without the divergence of coefficients after ending the double-talking. And it shows the ERLE of averagely 20dB higher than the normal LMS algorithm.
Keywords
Blind Signal Separation; Acoustic echo canceller; Double-talk; Multi-channel; Adaptive algorithm;
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