基于阵列抗串扰自适应噪声抵消的语音增强

Speech Enhancement Based on Array Cross-Talk Resistant Adaptive Noise Cancellation

本文提出了一种针对阵列交叉串扰信号的自适应噪声抵消方法 ,并将其用于麦克风阵语音增强 .该方法仅使用两级滤波系统 ,计算量小 ,稳定性好 ,且对麦克风阵的几何结构及噪声类型均没有严格限制 .试验表明 ,该方法消噪量大 ,对语音损伤小 ,语音增强效果显著 ,适用于多种噪声环境并易于实时实现 .

An adaptive noise cancellation method is presented to extract desired signal from array cross-talk signals, and is used to microphone array speech enhancement. Employing a two-stage filtering system, the method not only has a character of small amount of computations and high stability, but also has no strict limitations to the geometric structure of the microphone array and even to the noise types. Experiment results show that the method is quite effective in speech enhancement as it can cancel a large amount of noise with little distortion to speech signals, and that the method is suitable to many kinds of noisy environments and easy for real-time implementation.