<研究論文>エコーキャンセラのための可変ステップゲインを有する射影アルゴリズム

概要

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The sound effect is very important in a remote education using a teleconference system. Especially, it is indispensable that the acoustic echo path is estimated with the echo canceller so fast as not to have influence on the conversation. A problem is to improve the speech quality of the echo canceller for the multi-channel. In this case, the signal in one channel becomes the noise for the signal in the other channel. Therefore, when the voices are given to the multi-channel at the same time, the estimation of the acoustic echo path becomes difficult. In this report, we describe two-channel echo canceller constructed using the projection algorithm and the FIR filter. We have proposed the projection algorithm which has the step gain corrected sequentially for the fast estimation of the FIR filter coefficients. We have simulated this problem of two-channel echo canceller by our proposed algorithm.
東京都立航空工業高等専門学校の論文