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Performance Improvement of Stereophonic Acoustic Echo Canceler Using Non-linear Pre-processing Filter  

박장식 (동의공업대학 영상정보과)
정일규 (부산대학교 전자공학과)
손경식 (부산대학교 전자공학과)
김현태 (동의대학교 컴퓨터영상공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.21, no.3, 2002 , pp. 264-273 More about this Journal
Abstract
Adaptive filters cannot exactly estimate the echo path of the receiving room because of the cross-correlation of stereo signals. In this paper, a new pre-processing method reducing the cross-correlation without degradation of stereophony is proposed to enhance the performance of stereophonic acoustic echo canceller. To reduce the cross-correlation, absolutes of two orthogonal signals derived from each channel signals are added to original channel signals. Assuming that the power of each channel signal is larger than that of the cross-correlation, the computation of pre-processing can be reduced. As results of simulations, it is shown that the performance of stereo acoustic echo canceller with the proposed pre-processing method is better than that of conventional ones.
Keywords
Stereo; Acoustic echo canceller; Adaptive filter; Pre-processing; Cross-correlation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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