Real-time DSP implementation of a subband beamforming algorithm for dual microphone speech enhancement

被引：4
|
作者：
Yermeche, Zohra [1 ]
Sallberg, Benny [1 ]
Grbic, Nedelko [1 ]
Claesson, Ingvar [1 ]
机构：
[1] Blekinge Inst Technol, Sch Engn, SE-37225 Ronneby, Sweden
来源：
2007 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-11 | 2007年
关键词：
D O I：
10.1109/ISCAS.2007.378462
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
A real-time Digital Signal Processor (DSP) based implementation of a subband beamforming algorithm and its evaluation for dual microphone speech enhancement is presented. The algorithm, a calibrated constrained beamformer, is described theoretically and a real-time structure is proposed, including an efficient approach for multichannel data transformation. Measurements show that the battery driven DSP implementation supports 20 h operation-time, with an improved Signal-to-Noise Ratio (SNR) of up to 14 dB in high-noise factory environment. Further, less than half the provided computational performance of the DSP is used by the proposed method, hence, processing of additional tasks may be included.
引用
收藏
页码：353 / 356
页数：4
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