文档介绍：第 36 卷第 12 期 电 子 与 信 息 学 报
2014 年 12 月 system estimation
with insignificant bias. Commonly used additional double-talk detector and inter-channel coherence based residual
echo suppressor are not needed since short-time coherence analysis is performed in each stage. By further making
mild assumptions on the quasi-stationarity of the near-end background noise, both fast convergence and stability of
the estimation can be achieved simultaneously with a non-stationarity controlled smoothing factor. Experiments
are carried out to show the superiority of the proposed approach in terms of convergence speed and steady state
error in distant talking mode in ordinary room environment with various common levels of background noise.
Key words: Speech signal processing; Acoustic echo control; Stage-wise regression; Acoustic echo cancellation;
Acoustic echo suppression
1 引言 音通信系统的质量和人机交互系统的可靠性。为此，
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在远讲或免提模式下的语音通信和人机交互系 一般通过回声抵消(echo cancellation) 或回声抑