长时延话音通信中的回波自适应抵消

Adaptive Echo Cancel for Long-time Delay Voice Communication.

该文研究了话音通信中的回波抵消问题。用自适应滤波器及分块修正系数的ＬＭＳ算法完成了对回波的抵消，并用ＴＭＳ３２０为核心完成了硬件实现。结果表明该方案各项指标均达ＣＣＩＴＴ标准。

This paper is concerned with the problem of echo cancel in long-time delay voice communication. The block update LMS al-gorithm and the adaptive fiIter are used to cancel the echo. A TMS320 chip is used as the kernel in the hardwares,The resuIts reveaI that the specification of this echo cancel is satisfying the CCITT.