Role of Phase Estimation in Speech Enhancement

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Title Role of Phase Estimation in Speech Enhancement
Author Shannon, Ben James; Paliwal, Kuldip Kumar
Publication Title Proceedings of the Ninth International Conference on Spoken Language Processing
Editor Richard M. Stern
Year Published 2006
Place of publication Bonn Germany
Publisher ISCA c/o Institute for Communication, University of Bonn
Abstract Typical speech enhancement algorithms that operate in the Fourier domain only modify the magnitude component. It is commonly understood that the phase component is perceptually unimportant, and thus, it is passed directly to the output.In recent intelligibility experiments, it has been reported that the Short-Time Fourier Transform (STFT) phase spectrum can provide significant intelligibility when estimated using a window function lower in dynamic range than the typical Hamming window. Motivated by this, we investigate the role of the window function for STFT phase estimation in relation to speech enhancement.Using a modified STFT Analysis-Modification-Synthesis (AMS) framework, we show that noise reduction can be achieved by modifying the window function used to estimate the STFT phase spectra. We demonstrate this through spectrogram plots and results from two objective speech quality measures.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.isca-speech.org/index.php
Alternative URI http://www.isca-speech.org/archive/interspeech_2006/
ISBN 1990-9772
Conference name Interspeech 2006
Location Pittsburgh
Date From 2006-09-17
Date To 2006-09-21
URI http://hdl.handle.net/10072/13317
Date Accessioned 2007-03-18
Date Available 2009-09-21T05:51:43Z
Language en_AU
Research Centre Institute for Integrated and Intelligent Systems
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Speech Recognition
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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