基于Windows平台的双通道回声抵消系统  

A Dual-channel Acoustic Echo Canceler on Windows Platform

作　　者：刘扬[1] 付中华[1] 唐玲[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710129

出　　处：《计算机与现代化》2014年第4期199-202,207,共5页Computer and Modernization

摘　　要：描述一个基于Windows平台的双通道回声抵消系统。该系统使用一种高速、高采样率的音频I/O驱动模型,能够在底层解决系统中声音处理的实时性和同步性问题。为了尽量减少网络和计算机资源的占用,采用重采样技术来改变声音信号在网络传输和实时处理时的采样率,其中系统使用重采样技术降低声音通道间的相关性,以提高回声抵消算法的效率。最后通过实验验证了双通道回声抵消系统的有效性。A dual-channel acoustic echo cancellation （AEC） system on Windows platform is proposed. It involves a high-speed and high sampling rate audio I/O driver model, which can solve the real-time and synchronic audio processing problems through low-level interface. To reduce the transmission and computation loads, a resampling technique is used to adjust the sample rate during net transmission and real-time processing. Additionally, the inter-channel decorrelation is implemented with frequency-do- main resampling technique so as to improve the performance of echo cancellation. The experimental results verified the effective- ness of the proposed system.

关 键 词：回声抵消 多线程 重采样 去相关 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]