A Delay-Based Constrained Beamformer for Blind Speech Enhancement and Dereverberation

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Zohra Yermeche, Nedelko Grbic
Title: A Delay-Based Constrained Beamformer for Blind Speech Enhancement and Dereverberation
Conference name: ELMAR
Year: 2007
Publisher: IEEE
City: Zadar, Croatia
ISI number: 000256667800034
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, ngr@bth.se
Language: English
Abstract: This paper presents a new microphone array method to enhance speech signals in a noisy reverberant environment. A time-delay estimation method is used for the speech source localization. The robustness of the localization method in high noise levels is provided by a subband Kurtosis-weighted structure. The estimated inter-sensor time-delays are directly used in an adaptive soft-constrained subband beamformer. Evaluation in a simulated environment with real speech sequences shows promising results.
Subject: Signal Processing\Beamforming
Signal Processing\Speech Enhancement
Keywords: Speech enhancement, dereverberation, beamforming, time-delay estimation
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