一种双通道语音增强方法

A Dual Microphone Speech Enhancement Method

本文提出了一种用于语音识别的双麦克风语音增强算法。该算法主要利用两个语音通道之间语音信号的空间相关性和时间相关性,进行空时域滤波,消除噪声。在输入语音信噪比为0至20dB之间时,能获得较大的信噪比处理增益。该方法只采用了两个麦克风,结构简单;相对于维纳后滤波法,解除了要求两麦克风接收的噪声信号不相关的约束,可以去除点声源的非强相干噪声。和一般的波束形成算法相比,可以去除期望声源方向的弱相关噪声。

A voice recognition speech enhancement method for dual microphones is proposed.This method,making use of two voice signal spatial correlation and temporal correlation,can reduce noise by spatial-temporal prediction.When the input SNR is higher than 0dB,remarkable improved SNR can be obtained.This method is based on two microphones,with a simple structure;the reduction to a point noise is remarkable;the irrelevance of noise between two microphones is not required;and the weak correlative noise on the target direction can be reduced.