REAL TIME IMPLEMENTATION OF A BLIND BEAMFORMER FOR SUBBAND SPEECH ENHANCEMENT USING KURTOSIS MAXIMIZATION

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Benny Sällberg, Mikael Swartling, Nedelko Grbic, Ingvar Claesson
Title: REAL TIME IMPLEMENTATION OF A BLIND BEAMFORMER FOR SUBBAND SPEECH ENHANCEMENT USING KURTOSIS MAXIMIZATION
Conference name: International Workshop on Acoustic Echo and Noise Control
Year: 2006
City: Paris
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
http://www.tek.bth.se/
Authors e-mail: bsa@bth.se, msw@bth.se, ngr@bth.se, icl@bth.se
Language: English
Abstract: This paper presents a real time implementation of a blind beamformer for subband speech enhancement. The beamformer adaptively maximizes the statistical kurtosis measure of the beamformer’s output signal. Speech carries high kurtosis and noise often exhibit lower kurtosis. Hence, maximization of the output signal’s kurtosis enhances speech, in general. The implementation is carried out on a novel framework for real time audio processing in MATLAB and uses low latency ASIO sound cards. The implementation is evaluated using recorded signals and the speech is enhanced approximately 10 dB by the proposed approach with perceptually low speech distortion.
Subject: Signal Processing\Speech Enhancement
Signal Processing\Beamforming
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