Stereo Acoustic Echo Canceller Using Difference Components of Channel Signals

채널 신호의 차성분을 이용한 스테레오 음향 반향 제거기

  • Kim Hyun Tae (Regional Office of Pusan/Ulsan Small and Medium Business Admin.) ;
  • Park Jang Sik (Dept. Image Processing, Dong-Eui Institute of Technology) ;
  • Son Kyung Sik (Dept. Electronics Engineering, Pusan National University)
  • Published : 1999.11.06

Abstract

In stereo acoustic echo canceller scheme, adaptive filters coefficients converge very slowly or misconverge to real acoustic echo path in receiving room. This is due to cross-correlation between channel signals. In this paper, new preprocessor using absolute difference factor between stereo signals is proposed to reduce cross-correlation between signals. Computer simulations demonstrate that this preprocessor perform well to the half wave rectifier which has simple and good performance of the several preprocessors in recent papers. When the paths in transmitting room change, performance does not degrade in proposed preprocessor.

Keywords