摘要
介绍了语音通信声学回声产生模型和自适应AEC回声消除算法原理,分析了AEC应用于VoIP语音通信中存在的问题,设计了一种基于短时能量的非线性回声消除方法,在NGN网络的VoIP通信中,使用该方法实现了极高的回声抑制比。测试结果表明该方法的消回声效果、算法稳定性和实现复杂度等指标明显优于自适应AEC算法,适合于嵌入式VoIP通信终端设备的开发。
The model of echo in voice communication is presented,the principle of acoustic echo cancelling（AEC） described,and the problem in applying AEC to VoIP communication discussed in detail.A new method of non-linear echo cancelling based on short-time energy is proposed,which could achieve very high ratio of echo canceling in VoIP communication of NGN network.The experiment results show that the proposed algorithm is significantly better than the self-adaptive AEC algorithm in echo cancellation;algorithm stability and implementation complexity,and quite applicable to the development of embedded VOIP communication devices.
出处
《通信技术》
2010年第4期14-16,共3页
Communications Technology
基金
江西省自然科学基金(项目编号:2008GZS0030)
关键词
回声消除
短时能量
下一代网络
语音通信
acoustic echo cancellation
short-time energy
NGN
voice communication
