基于相干性滤波器的广义旁瓣抵消器麦克风小阵列语音增强方法.PDF
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第34 卷第12 期 电 子 与 信 息 学 报 Vol.34No.12
2012 年12 月 Journal of Electronics Information Technology Dec. 2012
基于相干性滤波器的广义旁瓣抵消器麦克风小阵列语音增强方法
杨立春*①② 钱沄涛①
①(浙江大学计算机科学与技术学院 杭州 310027)
②(浙江万里学院智能控制技术研究所 宁波 315101)
摘 要:为了克服传统麦克风小阵列语音增强算法噪音抑制能力有限的问题,该文提出一种基于相干性滤波器的广
义旁瓣抵消器语音增强算法, 该算法基于动态平滑系数噪声谱估计来获得相干性滤波器,分别对每个阵元接收到的
信号进行滤波用以抑制包括混响等噪声信号的干扰,并把滤波后的信号作为输入信号,使用基于小阵列的广义旁瓣
抵消器波束形成算法抑制残余噪声信号的干扰。模拟和实际试验表明,该文提出的算法明显优于单独使用小阵列波
束形成算法和相干性滤波器算法。
关键词:语音信号处理;麦克风小阵列;语音增强;相干性滤波器;广义旁瓣抵消器
中图分类号:TN912.3 文献标识码: A 文章编号:1009-5896(2012)12-3027-07
DOI: 10.3724/SP.J.1146.2012.00557
Speech Enhancement with Generalized Sidelobe Canceller Based on
a Coherence-based Filter for Small Microphone Arrays
①② ①
Yang Li-chun Qian Yun-tao
①
(College of Computer Science, Zhejiang University, Hangzhou 310027, China)
②
(Intelligent Control Research Institute, Zhejiang Wanli University, Ningbo 315101, China)
Abstract: In order to overcome the problem that the noise suppression ability of traditional small microphone
arrays speech enhancement algorithm is limited, this paper proposes coherence spectral estimation based on the
variable coefficients noise filter algorithm to suppress the reverberant interference, and then use the Generalized
Sidelobe Canceler (GSC) which based on small microphone arrays canceller to suppress remaining noise and
simulations and practical tests show that the proposed algorithm is superior to separate small array beamforming
algorithms and coherence filter algorithm.
Key words: Speech signal processing; S
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