一种改进的直接求解声回波消除算法  

An improved direct solution algorithm for acoustic echo cancellation

作　　者：陈佐[1] 何培宇[1] 邵明义[1] Pei-Yu Ming-Yi 

机构地区：[1]四川大学电子信息学院,成都610065

出　　处：《四川大学学报（自然科学版）》2009年第6期1714-1718,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(60472096)

摘　　要：在直接求解声回波消除法的基础上,提出一种改进的直接求解声回波消除算法.该算法将估计的输入信号自相关矩阵做平均处理近似为Toeplitz矩阵,从而可利用Toeplitz线性方程组的快速算法直接求解正则方程,大幅降低了原直接求解法的计算量.同时仿真表明该改进算法仍具有较好的声回波消除效果,尤其是在有强背景噪声时具有稳健的性能.An improved direct solution algorithm for application to acoustic echo cancellation (AEC) based on the direct solution algorithm is proposed in this paper.The improved algorithm averages the estimated input auto-correlation matrix to be a Toeplitz matrix,so that it is possible to solve the normal equations directly with fast algorithm of linear Toeplitz equations.As a result,it reduces greatly the computational load of the conventional direct solution algorithm.Simulations show that the improved algorithm also exhibits nice convergence performance,and stability especially when it is applied in strongly noisy environment.

关 键 词：改进算法 直接求解法 回波消除算法 acoustic ECHO cancellation solution improved ALGORITHM TOEPLITZ matrix 声回波 fast ALGORITHM TOEPLITZ矩阵 conventional performance application 自相关矩阵 线性方程组 especially 正则方程 输入信号 平均处理 快速算法 

分 类 号：N55[自然科学总论]