Distortionless Beamforming Optimized With l1-Norm Minimization

被引：9
|
作者：
Emura, Satoru [1 ]
Araki, Shoko [2 ]
Nakatani, Tomohiro [2 ]
Harada, Noboru [1 ]
机构：
[1] Nippon Telegraph & Tel Corp, Media Intelligence Labs, Musashino, Tokyo 1808585, Japan
[2] Nippon Telegraph & Tel Corp, Commun Sci Labs, Kyoto 6190237, Japan
来源：
IEEE SIGNAL PROCESSING LETTERS | 2018年 / 25卷 / 07期
关键词：
Beamformer; l(1) norm; minimum power distortionless response (MPDR); source separation; SPEECH; DECOMPOSITION; SEPARATION; ROOM;
D O I：
10.1109/LSP.2018.2834870
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We proposea beamforming method that minimizes the l(1) norm of a beamformer output vector under the same distortionless constraint as that of the conventional minimum power distortionless response (MPDR) beamformer. Using the l(1) norm makes the beamformer output sparse. This leads to reducing the residual elements of the interference signal. In addition, the sensitivity of the proposed beamformer can be controlled by adding a norm constraint as in the MPDR beamformer. The proposed method improved the signal-to-interference-noise ratio by 7 dB from that of the MPDR beamformer for reverberation time T-60 = 300 ms in a simulation.
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页码：936 / 940
页数：5
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