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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (8): 1493-1499    DOI: 10.3785/j.issn.1008-973X.2013.08.0025
计算机技术﹑电信技术     
基于零陷谱减的GSC二元麦克风小阵列语音增强算法
杨立春1,2, 钱沄涛1, 王文宏1
1.浙江大学 计算机科学与技术学院,浙江 杭州310027；2.浙江万里学院 智能控制技术研究所,浙江 宁波 315101
A GSC algorithm based on null spectral subtraction for dual small microphone array speech enhancement
YANG Li-chun1,2, QIAN Yun-tao1, WANG Wen-hong1
1. College of Computer Science,Zhejiang University,Hangzhou 310027, China; 2. Intelligent Control Research Institute, Zhejiang Wanli University, Ningbo 315101
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摘要：

为了提高广义旁瓣抵消器语音增强算法在二元麦克风小阵列中的噪声抑制能力,提出一种基于零陷谱减二元麦克风小阵列广义旁瓣抵消器的改进语音增强算法.在广义旁瓣抵消器固定波束支路上利用谱减法抑制目标语音零陷方向噪声能量以提高其信噪比,在自适应支路使用基于动态收敛步长的快速分块最小均方自适应滤波器进一步抑制剩余噪声,以降低算法复杂度并提升自适应滤波器的收敛性.实验结果表明,相对于其他二元麦克风小阵列波束形成语音增强算法,该算法可以在任意方向获得较高质量的目标语音.
Abstract:

 To improve the denoising ability of generalized sidelobe canceller(GSC) algorithm  for  dual small microphone array, a new GSC based on null spectral subtraction is  proposed. In fixed beamforming branch of GSC, noise energy of desired speech  in null direction  is suppressed by spectral subtraction to improve the signal to noise ratio (SNR). At the same time,in  adaptive beamforming branch of GSC, a fast block least mean square (FBLMS) based adaptive filter further suppresses the residual noise, in which a dynamic convergence step is used to  reduce the computational  complexity and improve the convergence of adaptive filter. Compared with other denoising algorithms used for dual small microphone array,  experimental results show that the desired speech obtained by  the proposed algorithm is always of higher quality  in any direction.
出版日期: 2013-08-01
:  TN 912.35  
基金资助:

 国家自然科学基金资助项目(61171151);国家“973”重点基础研究发展规划资助项目(2012CB316400);华为科技资助项目(YBCB2010059-2).
通讯作者: 钱沄涛,男,教授，博导.     E-mail: ytqian@zju.edu.cn
作者简介: 杨立春（1975—）,男,博士生,讲师,从事语音信号增强等方向研究.E-mail: lichun_y@126.com
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引用本文:

杨立春, 钱沄涛, 王文宏. 基于零陷谱减的GSC二元麦克风小阵列语音增强算法[J]. J4, 2013, 47(8): 1493-1499.

YANG Li-chun, QIAN Yun-tao, WANG Wen-hong. A GSC algorithm based on null spectral subtraction for dual small microphone array speech enhancement. J4, 2013, 47(8): 1493-1499.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.08.0025    或    http://www.zjujournals.com/eng/CN/Y2013/V47/I8/1493

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