【摘要】 麦克风阵列在语音信号处理领域有着非常广泛的应用,该文提出了一种基于麦克风阵列的语音增强与干扰抑制算法,即空频联合处理算法。首先利用延迟-求和波束形成技术分别对麦克风阵列接收信号中的语音信号和干扰信号进行波束形成。然后将时域上的两个波束形成输出转换到频域,在频域上构造加权系数,利用加权系数乘以频域上的语音信号,从而进一步实现滤除干扰信号以增强语音信号的目的。仿真结果表明,该文提出的算法可以有效地对语音信号进行增强并且抑制干扰信号。相对于纯空域方法,该文提出的空频联合处理方法可以更有效地增强语音信号和抑制干扰。更多还原

【Abstract】 Microphone arrays has wide applications in the area of speech signal processing. A speech enhancement and interference suppression algorithm based on microphone arrays is proposed. That is space and frequency processing algorithm.Firstly,the speech signal and interference signal in the received signal of microphone arrays are beamformed by using the delay-sum beamforming method. Then,the two beamforming outputs are transformed from the time domain to the frequency domain. In the frequency domain,a weighting function is constructed with the two beamforming outputs. Finally,in order to filter the interference signal and enhance the speech signal,the speech signal is multiplied by weighting function in the frequency domain. The simulation results demonstrate that,the algorithm proposed in this paper can enhance the speech signal and suppress the interference signal effectively. Comparing with processing only in the space domain,the algorithm proposed in this paper can enhance speech signal more efficiently.更多还原