IP电话长时延环境的回声抵消算法的研究

A Long Delay Property Based Echo Cancellation Method in IP Telephone

近年来,因特网技术快速发展,其业务类型已进入传统电信的实时话音通信。文中首先论述了VoIP(Voice Over IP)技术中的延迟和回声问题,并回顾了IP电话中基本的回声抵消算法,最后结合IP网络的长延迟特性给出了一种基于延迟估计的回声抵消优化算法。

In recent years, considerable interest has been focused on VoIP system. In this paper, the delay and echo of the VoIP system is first discussed, in IP network, and then, the basic echo cancellation algorithm is reviewed. Finally, the estimation of delay in IP network is used to enhance echo cancellation.