高噪声环境下的麦克风阵列VAD算法研究

首先介绍一种基于频带方差的语音活动检测（VAD）算法，然后在此基础上，给出一种对麦克风阵列各通道信号同时进行VAD的新算法（ICA—VAD）：经ICA分离出的相对纯净的语音信号作为参考信号，其VAD结果用于指导阵列信号的语音检测。实验结果表明该方法在恶劣的噪声环境下仍可以获得准确的检测结果，且计算机模拟显示这是一种比较好的抗噪语音检测方案。

Research on VAD for Microphone Array in a Background of High Noise

First of all,a kind of voice activity detection(VAD)algorithm based on variance of frequency band is introduced by colored additive noise.And then,according to it,a VAD method for microphone array is proposed: more 'pure' voice can be obtained by using independent component analysis(ICA).The VAD result of this 'pure' voice is used as reference for detecting those of all array signals.Simulation results illustrate the validity of the proposed method,and they show that the method has good performance for anti-noise.