A Multi-Channel Echo Cancellation Structure Based on a Blind Signal Separation Model

XIE Sheng-li; WANG Jie

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A Multi-Channel Echo Cancellation Structure Based on a Blind Signal Separation Model

更新时间：2025-07-16

- A Multi-Channel Echo Cancellation Structure Based on a Blind Signal Separation Model
- Acta Electronica Sinica Vol. 32, Issue 7, Pages: 1124-1126(2004)
- 作者机构：
  
  华南理工大学电信学院,广东,广州,510641
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.72
- Published：2004
- 稿件说明：
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XIE Sheng-li, WANG Jie. A Multi-Channel Echo Cancellation Structure Based on a Blind Signal Separation Model[J]. Acta Electronica Sinica, 2004, 32(7): 1124-1126.
DOI：

XIE Sheng-li, WANG Jie. A Multi-Channel Echo Cancellation Structure Based on a Blind Signal Separation Model[J]. Acta Electronica Sinica, 2004, 32(7): 1124-1126. DOI：

摘要

多路回波消除问题的本质难点是由于多路输入信号之间的强相关性而导致的自适应滤波器解不唯一的问题.目前许多文献都是试图通过对输入信号预处理来解决这个问题

这些方法都对原输入信号作了变化

从而影响了通话质量.本文提出了一个简化的盲信号分离模型的立体声回波消除结构

在这个结构中

立体声回波消除问题被转化为两个单路的回波消除问题

从而避免了自适应滤波器解不唯一的问题.仿真结果证明了新结构的有效性.

Abstract

Multi-channel acoustic echo cancellation(AEC) systems suffer from the non-uniqueness problem of the adaptive identification solution because of the correlation of the input signals.This paper investigates integrating a simplified blind signal separation (BSS) model into the stereophonic acoustic echo cancellation (SAEC).The integrated new structure translates the SAEC problem into two single-channel AEC problems so as to avoid the NUP and doesn't influence the audio quality. The simulation results improve the effectiveness of the new structure.

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