电话会议系统中的回波及其消除技术

Echo and its Cancellation technique in Teleconference System

文章叙述了电话会议系统中回波产生的原因，以及解决这一问题的传统方法和发展中的自适应回波消除方法，给出了CCITT的有关建议。

This paper describes the reason of echo gencrated in teleconference system. Some classical methods and the developil1g adaptive echo cancellation method to solve this problem are introduced secondly. Some pieces of advice associated with echo cancellcr in CCITT are also listed in the paper.