带有时变非线性预处理的立体声回波消除方法研究  

Stereo Acoustic Echo Canceling Methodwith Time-Variable Nonlinear Pre-Processing

作　　者：周元建[1] 谢胜利[1] 

机构地区：[1]华南理工大学无线电与自动控制研究所,广州510641

出　　处：《数据采集与处理》2003年第1期109-113,共5页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金 ( 60 2 74 0 0 6);广东省自然科学重点基金 ( 990 892 );教育部重点科研基金 ( 0 2 1 5 2 )资助项目。

摘　　要：就立体声回波消除问题提出了两种新的信号非线性预处理方法 ,并给出了相应的自适应算法。新的预处理方法比 Benesty( 1 997)及 Joncour( 1 998)的方法对信号的非线性处理部分要少 ,因而对语音信号的质量影响有所下降。仿真结果表明 ,新的预处理方法与其实现算法相结合应用于立体声回波消除时 ,比 Benesty( 1 997)及 Jon-cour( 1 998)所提方法的效果更好。There are some problems such as no unique solution, large misalignment, and slow convergence in stereo acoustic echo cancellation caused by high correlation between stereo signals. Pre-processing signal to improve echo path identify by adding two nonlinear pre-processing units to conventional stereo acoustic cancellation is one of solutions to overcome above problems. In this paper, two methods that pre-process input signal nonlinearly and time-variably and responsive adaptive filtering algorithms for stereo acoustic echo cancellation are proposed. As compared to the methods presented by Benesty (1997) and Joncour(1998), the new pre-processing methods have less affect in speech quality due to input signal little. Simulation in MATLAB shows that the methods have better performance than that of Benesty(1997) and Joncour(1998) when it is applied to stereo acoustic echo cancellation.

关 键 词：多路回波消除 自适应算法 非线性预处理 

分 类 号：TN911[电子电信—通信与信息系统]