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

机译:频域自适应卡尔曼滤波器,用于免提电话中的声学回声控制

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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.
机译:回声消除器和用于残余回声抑制的后置滤波器是免提语音通信系统的两个基本组成部分。基于卡尔曼滤波器理论,我们推导出了一种简单而先进的算法,用于在时变和嘈杂的声学环境中对两个滤波器系数进行最佳联合统计自适应。卡尔曼滤波器利用了完全在频域中表达的声回波路径的随机状态空间模型。所得的自适应算法在计算上是有效的,并且具有固有的鲁棒性,即,该自适应不需要附加的正则化或控制机制。 (c)2005 Elsevier B.V.保留所有权利。

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