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Performance Improvement of Double-talk Detector Using Normalized Error Signal Power  

Heo, Won-Chul (LG전자 디지털미디어 연구소)
Bae, Keun-Sung (경북대학교 전자전기컴퓨터학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.5C, 2007 , pp. 478-486 More about this Journal
Abstract
Double-talk detection errors can result in either large residual echo or distorting the near-end talker's input speech. Thus accurate double-talk detection is an important problem in the acoustic echo canceller to improve the speech quality. In the double-talk detection algorithm using a cross-correlation coefficient, double-talk detection errors can occur in the initial convergence period of an adaptive filter or in noisy environment since the cross-correlation coefficient becomes large in such situations. In this paper, we propose a new double-talk detection algorithm based on the cross-correlation method using a normalized error signal power to reduce the double-talk detection errors. The experimental results have shown the performance improvement of an acoustic echo canceller as well as the noise-robustness of the proposed double-talk detector.
Keywords
Acoustic echo canceller; Double-talk detector; Normalized error signal power;
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