Real-Time DSP Implementation of a Subband Beamforming Algorithm for Dual Microphone Speech Enhancement

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Zohra Yermeche, Benny Sällberg, Nedelko Grbic, Ingvar Claesson
Title: Real-Time DSP Implementation of a Subband Beamforming Algorithm for Dual Microphone Speech Enhancement
Conference name: ISCAS
Year: 2007
Pagination: 353-356
ISBN: 1-4244-0921-7
Publisher: IEEE
City: New Orleans, LA, USA
ISI number: 000251608400089
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (*** Error ***)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
http://www.tek.bth.se/
Authors e-mail: zye@bth.se, bsa@bth.se, ngr@bth.se, icl@bth.se
Language: English
Abstract: 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.
Subject: Signal Processing\Beamforming
Signal Processing\Speech Enhancement
Keywords: Speech enhancement, Beamforming, DSP
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