计算机工程与应用 ›› 2012, Vol. 48 ›› Issue (15): 119-122.

• 数据库、信号与信息处理 • 上一篇    下一篇

呼叫中心系统中回声抵消算法的研究与实现

李  丽,姚仲敏,石翠萍   

  1. 齐齐哈尔大学 通信学院,黑龙江 齐齐哈尔 161006
  • 出版日期:2012-05-21 发布日期:2012-05-30

Echo cancellation algorithm and implementation in call center system

LI Li, YAO Zhongmin, SHI Cuiping   

  1. School of Communication, Qiqihar University, Qiqihar, Heilongjiang 161006, China
  • Online:2012-05-21 Published:2012-05-30

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。

关键词: 呼叫中心, 回声消除, 最小均方误差算法

Abstract: 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.

Key words: call center, echo cancellation, Least Mean Square(LMS) algorithm