Frequency-domain adaptive Kalman filter for acoustic echo control in hands-free telephones

被引:143
|
作者
Enzner, G [1 ]
Vary, P [1 ]
机构
[1] Univ Aachen, IND, D-52056 Aachen, Germany
关键词
acoustic echo; adaptive filters; Kalman filters; frequency-domain;
D O I
10.1016/j.sigpro.2005.09.013
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Acoustic echo canceler and postfilter for residual echo suppression are two essential building blocks of a hands-free voice communication system. Based on the Kalman filter theory, we derive a simple and advanced algorithm for the optimum joint statistical adaptation of both filter coefficients in time-varying and noisy acoustic environments. The Kalman filter utilizes a stochastic state-space model of the acoustic echo path which is formulated entirely in the frequency-domain. The resulting adaptive algorithm is computationally efficient and inherently robust, i.e., the adaptation does not require additional regularization or control mechanisms. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:1140 / 1156
页数:17
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