呼叫中心系统中回声抵消算法的研究与实现  

Echo cancellation algorithm and implementation in call center system

作　　者：李丽[1] 姚仲敏[1] 石翠萍[1] 

机构地区：[1]齐齐哈尔大学通信学院,黑龙江齐齐哈尔161006

出　　处：《计算机工程与应用》2012年第15期119-122,共4页Computer Engineering and Applications

基　　金：黑龙江省自然科学基金(No.F201008);黑龙江省青年科学基金项目(No.QC2011C092);齐齐哈尔市科技局工业攻关计划项目(No.GYGG-09008-1);齐齐哈尔市科学技术计划项目(No.GYGG2010-03-1)

摘　　要：针对IP呼叫中心系统中的回声问题,对算法LMS(Least Mean Square)进行了研究。经研究发现,回声消除算法LMS在收敛速度与稳态误差之间始终存在着矛盾,即加快收敛速度,则稳态误差随之加大;减小稳态误差,则收敛速度随之减慢。研究的目的就是能够使两者之间的矛盾得到改善,能够更好地消除回声。研究的方法是在现有算法的基础上,提出了一种改进的LMS算法,通过计算机对该算法进行了仿真,以及利用DSP进行了回声消除,结论表明该算法具有良好的收敛性能和稳态性能,更好地改善了收敛速度与稳态误差之间的矛盾,消除效果较好。LMS（Least Mean Square）algorithm has been studied for the echo problem of IP call center. The study shows that there is a contradiction between the convergence rate and steady-state error. In other words, speeding up the convergence rate, the steady-state error will be increased; reducing steady-state error, the convergence rate will be slow. The purpose of study is to improve the contradiction and better eliminate echo. A new LMS algorithm is proposed. The algorithm is simulated by using computer, and echo is eliminated by using DSP. Result is that this algorithm has good convergence and steady-state performance. It can better improve the contradiction between the convergence speed and steady-state error, and the elimination result is good.

关 键 词：呼叫中心 回声消除 最小均方误差算法 

分 类 号：TP312[自动化与计算机技术—计算机软件与理论]