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Low Distortion SNR–Based Speech Enhancement Employing Critical Band Filter Banks
Responsible organisation
2003 (English)Conference paper, (Refereed) PublishedAlternative title
Low Distortion SNR–Based Speech Enhancement Employing Critical Band Filter Banks (Swedish)
Abstract [en]

This paper presents a speech enhancement method for personal communication where the input signal is divided into a number of subbands that are individually and adaptively weighted in time domain according to a short term SNR estimate in each subband at every time instant. Hence the name Adaptive Gain Equalizer. The method is focused on speech enhancement, acting as a speech booster, and remains idle when the SNR in a particular subband is low. Hence, background artifacts are eliminated and there is no need for a Voice Activity Detector (VAD). This paper also presents a method for least squares design of nonuniformfilter banks for application in subband signal processing. Design objectives aim to optimize the filter bank frequency response while minimizing subband and output aliasing. Critical band filter banks with increasing bandwidth are designed and evaluated with the speech enhancement method.

Place, publisher, year, edition, pages
Singapore, SINGAPORE: IEEE , 2003.
Keyword [en]
Speech Enhancement, Filter Bank Design
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-9718ISI: 000222026600027Local ID: oai:bth.se:forskinfoA0638A2CE688A83EC1256D9E00373597ISBN: 0-7803-8185-8 (print)OAI: oai:DiVA.org:bth-9718DiVA: diva2:837641
Conference
ICICS-2003
Available from: 2012-09-18 Created: 2003-09-11 Last updated: 2015-06-30Bibliographically approved

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Dahl, MattiasClaesson, Ingvar
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