在对语音通话中回音产生机理进行分析的基础上，讨论了回音抵消的基本原理和基本方法。根据FM2018－380芯片的特性和μC／OS－Ⅱ操作系统平台，设计了回音抵消的软硬件实现方案。通过搭建实验环境，验证了回音抵消器的实用性。目前，已在电梯安全运行网关项目中得以应用实现。%This paper discusses the basic principles and methods of echo cancel ation based on the analysis of the mechanism of the generation of echo in the voice cal system.According to the feature of FM2018-380 and μC/OS-Ⅱ operating system platform,it designes software and hardware solutions of echo cancel ation.Through building the experimental environ-ment,it verified the practicality of echo cancel ation device.
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