Robust microphone array using subband adaptive beamformer and spectral subtraction

被引：7
|
作者：
Low, SY [1 ]
Gric, N [1 ]
Nordholm, S [1 ]
机构：
[1] Univ Western Australia, Western Australia Telecommun Res Inst, Nedlands, WA 6009, Australia
来源：
ICCS 2002: 8TH INTERNATIONAL CONFERENCE ON COMMUNICATIONS SYSTEMS, VOLS 1 AND 2, PROCEEDINGS | 2002年
关键词：
D O I：
10.1109/ICCS.2002.1183287
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper presents a new robust microphone array to enhance speech signal under the influence of noise and jammer(s). The proposed structure comprises of a soft constrained subband beamformer, a blocking system and a non-coherent processing technique. The soft constrained beamformer enhances the desired speech signal in a specified region by suppressing all side-lobes. This enhanced signal is then used as a reference signal by the blocking system to estimate the interference spectrum. Finally, the beamformer's output is spectral subtracted using the estimated interference spectrum. Simulations in a real office environment show higher interference suppression level compared to those obtained using the soft constrained beamformer only. Most importantly, this is achieved with negligible expense on target signal distortion.
引用
收藏
页码：1020 / 1024
页数：5
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