话音回波抵消器的研究

THE RESEARCH OF THE VOICE ECHO CANCELLER

给出了话音回波抵消技术的原理和参数选择准则.利用大规模集成电路-单片数字信号处理器TMS32020和话音编译码器MC14403,完成了128抽头的全数字话音回波抵消器的技术研究,详细讨论了TMS32020话音回波抵消器实现过程中所遇到的问题和相应的解决方法.

The principles of the voice echo canceller technologies and the criteria of choosing parameters are given in the paper. The VLSI single DSP (Digital signal Processor) chip TMS32020 and voice codec MC14403 are used in the research. The technological realization of such full digital voice echo canceller with 128 taps has performed, meanwhile, the problems in the realization and the corresponding keys were also discussed in detail.