Tap-length optimization of adaptive filters used in stereophonic acoustic echo cancellation
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- 作者：Asutosh Kara ; asuka@es.aau.dk" class="auth_mail" title="E-mail the corresponding author ; M.N.S. Swamyb ; swamy@ece.concordia.ca" class="auth_mail" title="E-mail the corresponding author
- 关键词：Adaptive filter ; Tap-length ; Stereophonic acoustic echo cancellation ; Multiple sub-filters ; Convergence ; Signal-to-noise ratio
- 刊名：Signal Processing
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：131
- 期：Complete
- 页码：422-433
- 全文大小：1740 K
文摘
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A new tap-length-optimization algorithm for adaptive filters used in stereophonic acoustic echo cancellation is proposed.
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The proposed algorithm is specifically designed to model an exponentially-decaying envelope in the echo return path.
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The proposed algorithm is applied to a single long adaptive filter with thousands of coefficients to reduce the computational load.
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The existing multiple sub-filters-based echo canceller is studied along with the application of proposed variable tap-length algorithm.
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A convergence analysis for the most advanced sub-filters-based stereophonic acoustic echo cancellation algorithm is presented.