【作者】 龚乐中； 李广军； 郭志勇；

【Author】 GONG Le-zhong LI Guang-jun GUO Zhi-yong (Communication Department of UESTC, Chengdu 610054, China)

【机构】 电子科技大学通信学院；

【摘要】 在网络IP电话(VoIP)通信终端设备的免提操作中,声学回声消除技术起着非常重要的作用。利用高性能处理器来实现实时的AEC算法以提升通话质量是一项十分有价值的工程应用。本文首先介绍了声学回声消除的基本原理,然后提出了一种基于飞思卡尔公司MCF5235 Coldfire微控制器的AEC实现方案,最后在Matlab环境下进行仿真并建立在VoIP电话终端上集成AEC模块测试实时效果。更多还原

【Abstract】 Acoustic echo cancellation (AEC) is of vital interest for hands-free operation of VoIP(Voice Over IP) terminal. It is a valuable application to realize the real time implementation of an echo cancellation algorithm performed by utilizing high-performance processor. First the theory of acoustic echo cancellation is introduced in this paper, then an AEC implementation based on Freescale MCF5235 Coldfire MCU is recommended, finally simulation result in Matlab is given and AEC is tested in real-time by integrated into the terminal of VoIP.更多还原