基于阵列抗串扰自适应噪声抵消与谱相减相结合的语音增强  

Speech enhancement based on array cross-talk resistant adaptive noise cancellation and spectral subtraction

作　　者：曾庆宁[1] 欧阳缮[2] 

机构地区：[1]西安电子科技大学通信工程学院,西安7100071 [2]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《声学学报》2007年第3期250-257,共8页Acta Acustica

基　　金：国家自然科学基金(60272038);广西留学回国人员基金(0639028);全国优秀博士学位论文作者基金(200239)

摘　　要：基于传声器阵的语音增强对于语音通信及语音识别具有重要意义,减小传声器阵的孔径并提高其语音增强的效果将十分有利于扩大其应用范围。为此给出一种阵列抗串扰自适应噪声抵消方法,并将其与改进的谱相减技术相结合。分析与实验表明,该方案使增强语音的信噪比有了较大提高,所需的阵列孔径很小,而且还适用于多种噪声环境,并易于实时实现。Microphone array-based speech enhancement has great importance for speech communications and speech recognition. To reduce the aperture of the microphone array and to increase the effect of the speech enhancement will greatly broaden the application areas of the microphone array. An array crosstalk resistant adaptive noise cancellation method is therefore presented. And then an improved spectral subtraction algorithm is further cascaded to obtain better enhancement results. Theoretic analysis and experiments indicate that the proposed scheme needs only a very small microphone array while it simultaneously achieves a higher SNR improvement. Besides, the proposed scheme can be used in many noisy environments and is easy for real-time implementation.

关 键 词：自适应噪声抵消 语音增强 谱相减 阵列 串扰 传声器阵 语音识别 语音通信 

分 类 号：O422.8[理学—声学]