New configuration for a stereo echo canceller with nonlinear pre-processing
New configuration for a stereo echo canceller with nonlinear pre-processing
复制标题
具有非线性预处理功能的立体声回声消除器的新配置
DOI：
10.1109/icassp.1998.679683
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Y. Kaneda
中科院分区：
文献类型：
--
作者：
Suehiro Shimauchi;Y. Haneda;S. Makino;Y. Kaneda
提出了一种具有非线性预处理的立体声回波抵消器的新结构。预处理器将不相关分量添加到原始接收的立体声信号中，即使在传统配置中也改善了自适应滤波器的收敛。然而，由于不可听度的限制，预处理后的信号仍然包含大量的原始立体声信号，这些信号往往是高度互相关的。因此，改善是有限的。为了克服这一问题，我们的新立体声回声抵消器包括专用自适应滤波器，其输入是预处理器中产生的不相关信号。这些独占的自适应滤波器收敛到真正的解，而不会受到原始立体声信号之间的互相关的影响。计算机仿真结果证明了这一点。
A new configuration for a stereo echo canceller with nonlinear pre-processing is proposed. The pre-processor which adds uncorrelated components to the original received stereo signals improves the adaptive filter convergence even in the conventional configuration. However, because of the inaudibility restriction, the preprocessed signals still include a large amount of the original stereo signals which are often highly cross-correlated. Therefore, the improvement is limited. To overcome this, our new stereo echo canceller includes exclusive adaptive filters whose inputs are the uncorrelated signals generated in the pre-processor. These exclusive adaptive filters converge to true solutions without suffering from cross-correlation between the original stereo signals. This is demonstrated through computer simulation results.