几种常见的声回声抵消的状态检测算法及其性能研究  

Research on Common State Detection Algorithms and Performanceof Acoustic Echo Cancellation

作　　者：夏融 蒯伟[2] 

机构地区：[1]南京熊猫汉达科技有限公司卫星通信技术研究所 [2]海军驻南京地区通信军事代表室

出　　处：《通信与广播电视》2015年第3期1-8,共8页Communication & Audio and Video

摘　　要：在使用免提电话时,通常抑制采用自适应回声抵消处理的办法,但其在面对时变声场状态时极易失效,这时就需要用状态检测对其进行控制。本文对一些常见的状态检测算法比较分析,试图通过找出一种合适的算法,使回声抵消系统能够在这种声场状态快速时变的情况下稳定工作,并用实际语音数据模拟出类似声场状态的变化,并进行仿真。最后,通过归纳总结它们在这些声场状态变化下的特点,为实际应用中的算法选取提供依据。Adaptive echo cancellation is often used in hands-free phones, but it is easy to be invalid in time-varying acoustic field. So the state detection is needed to control the echo cancel- lation. This paper compares and analyzes common state detection algorithms, and tries to find a suitable one to make the echo cancellation system work stably in time-varying acous- tic field. In this paper, the change of similar acoustic field is also simulated with actual voice data, and the characteristics of the algorithms in such changeable acoustic field have been summarized for the selection of algorithm in practical applications.

关 键 词：状态检测 实际语音 数据模拟 语音信号 声信道 误警率 性能曲线 其在 功率比 近端 

分 类 号：TN912.3[电子电信—通信与信息系统]