三门限多级判决语音激活检测算法的研究  

The Study Of Voice Activity Detection Algorithm Using Three Thresholds And Multiple Judgments

作　　者：徐治[1] 

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000

出　　处：《电子技术（上海）》2015年第5期33-35,共3页Electronic Technology

摘　　要：语音激活检测在移动通信中具有重要的意义和广泛的应用,对语音处理的效果也有关键性的影响。本文针对移动通信应用场合的特点,研究了一种计算复杂度很低的语音激活检测算法,使用短时能量、平均过零率和平均幅度差三种时域特征门限进行多级检测。该算法在大信噪比下可以获得较好的检测结果,而且实时性较好。本文介绍了算法的信号处理流程、门限计算方法、部分实现细节以及实验结果。Voice activity detection is important and widely used in mobile communication, It＇s also key to the effect of voice processing. This paper studies a low computational complexity VAD algorithm aiming at the characteristics of mobile communication implementation. This algorithm uses three time domain features, i.e. short time energy, mean zero cross rate, mean amplitude difference to perform multiple judgments. It can achieve good results at high SNR and has good real time performance. This paper presents the signal processing flow, thresholds calculation, implementation details and experiment results of this algorithm.

关 键 词：语音激活检测 端点检测 平均幅度 平均过零率 平均幅度差 

分 类 号：TP912[自动化与计算机技术]