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An Acoustic Echo Cancellation Using Subadaptive Filter

机译:使用自适应滤波器的回声消除

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摘要

In this paper, a method using a subadaptive filter playing the supplementary role of acoustic echo cancellation is discussed. Since the updating state of the adaptive filter can be calculated approximately as a characteristic of the subadaptive filter, the step size parameter can be optimally controlled depending on the estimation accuracy. Also, for prevention of echo path variation, we discuss a variable detector in which the variation of the filter coefficients at the time of variation is considered. The proposed method is found to be robust to channel variations and can improve the ERLE by 10 to 15 dB in comparison with the conventional method.
机译:在本文中,讨论了一种使用次自适应滤波器的方法,该方法在回声抵消中起着补充作用。由于可以近似地计算自适应滤波器的更新状态作为次自适应滤波器的特性,因此可以根据估计精度来最佳地控制步长参数。另外,为了防止回声路径变化,我们讨论了一种可变检测器,其中考虑了变化时滤波器系数的变化。发现所提出的方法对于信道变化是鲁棒的,并且与传统方法相比可以将ERLE提高10到15dB。

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