计算机工程 ›› 2008, Vol. 34 ›› Issue (24): 230-232.doi: 10.3969/j.issn.1000-3428.2008.24.080

• 多媒体技术及应用 • 上一篇    下一篇

基于波束形成与SSA的多麦克风噪声消除

董鹏宇,林 涛

  

  1. (同济大学超大规模集成电路研究所,上海 200092)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-12-20 发布日期:2008-12-20

Multi-microphone Noise Reduction Based on Beamforming and SSA

DONG Peng-yu, LIN Tao

  

  1. (VLSI Institute, Tongji University, Shanghai 200092)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20

摘要: 提出一种基于波束形成技术与信号子空间滤波器的多麦克风噪声消除方法。利用波束形成器的空域滤波特性,使波束主瓣对准期望信号方向,零陷对准噪声方向,消除观察信号中弱相关与不相关噪声。利用信号子空间滤波器进一步消除波束形成器输出信号中的残余噪声。实验采用NOISEX92语音库,结果表明该方法具有较低的算法复杂度,有效降低了背景噪声。

关键词: 波束形成, 噪声消除, 子空间分解

Abstract: This paper proposes a new approach combing beamforming and subspace filter for noise reduction under multi-microphone condition. The directional characteristic of beamforming provides nulls against the noise signal and directional lobe to the target signal. The output of beamforming acts as input signal of subspace filter. Experimental results show that the method outperforms conventional algorithms in noise reduction, while its computation complexity is reduced.

Key words: beamforming, noise reduction, subspace divison

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