基于传声器阵列语音增强方法研究

传声器阵列通过对拾取的多路语音信号进行分析与处理,能取得改进语音质量、消除背景噪声和提高语音可懂度等明显效果,现已成为语音信号增强的一个重要的研究领域。介绍了基于传声器阵列的自适应波束形成方法,该方法采用GSC结构基于TF-GSC的最优后置滤波算法。仿真实验结果表明,该自适应波束形成器对干扰有很好的消除作用,对阵元的增益误差、位置误差不敏感,可以取得较好的语音增强效果。

Research of Speech Enhancement Based on Microphone Array

With the analysis and processing of collecting multichannel speech signal, microphone array can improve speech quality, eliminate background noise, enhance speech intelligibility and so on. An adaptive beamformer based on microphone array is introduced, which adopts a new speech enhancement algorithm of TF-GSC(Transfer Function Generalized Sidelobe Canceller) based on optimal postfiltering with GSC structure. Simulating experiments show that the beamformer can reduce noises efficiently, overcome gain error and position error of the microphone array, and get better performance of speech enhancement.