Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2000.09a
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- Pages.193-196
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- 2000
Stereo Echo Canceller Using Non-linear Pre-processing Filter
비선형 전처리 필터를 이용한 스테레오 음향반향 제거기
Abstract
An stereophonic acoustic echo canceller cannot exactly estimate the echo path in the receiving room, because of the cross-correlation between stereo signals. In this paper, the new preprocessing filter is proposed to reduce the cross-correlation between the signals without influence on stereophonic sound. Two channel signals are linearly decorrelated by using orthogonality principles and the attenuated absolute values of the decorrelated signals are added to each channel input signals. Assuming that the power of each channel signal is larger than that of the cross-correlation, computational burden is reduced.
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