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Paper Abstract and Keywords
Presentation 2012-01-26 13:30
Evaluation of Musical-Noise-Free Noise Reduction Under Real Acoustic Environments
Ryoichi Miyazaki, Hiroshi Saruwatari, Kiyohiro Shikano (NAIST), Kazunobu Kondo (YAMAHA) EA2011-108
Abstract (in Japanese) (See Japanese page) 
(in English) In this report, we propose a new theory of nonlinear noise reduction with
a perfectly musical-noise-free property, where no musical noise is generated even for a high signal-to-noise ratio. To achieve high-quality noise reduction with low musical noise, an iterative spectral subtraction method, i.e., recursively applied weak nonlinear signal processing, has been proposed. Although evaluation experiments indicated the existence of an appropriate parameter setting that gives a musical-noise-free state, no theoretical studies have been carried out. Therefore, in this report, we theoretically derive pairs of internal parameters that satisfy the musical-noise-free condition by analysis based on higher-order statistics.
It is clarified that finding a fixed point in the kurtosis of noise spectra enables the reproduction of the musical-noise-free state, and comparative experiments with commonly used noise reduction methods show the efficacy of the proposed method under real acoustic environments.
Keyword (in Japanese) (See Japanese page) 
(in English) speech enhancement / musical noise free / higher-order statistics / iterative spectral subtraction / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 402, EA2011-108, pp. 25-30, Jan. 2012.
Paper # EA2011-108 
Date of Issue 2012-01-19 (EA) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EA2011-108

Conference Information
Committee EA US  
Conference Date 2012-01-26 - 2012-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics,and Related Topics 
Paper Information
Registration To EA 
Conference Code 2012-01-EA-US 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Musical-Noise-Free Noise Reduction Under Real Acoustic Environments 
Sub Title (in English)  
Keyword(1) speech enhancement  
Keyword(2) musical noise free  
Keyword(3) higher-order statistics  
Keyword(4) iterative spectral subtraction  
1st Author's Name Ryoichi Miyazaki  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Hiroshi Saruwatari  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Kiyohiro Shikano  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
4th Author's Name Kazunobu Kondo  
4th Author's Affiliation Yamaha Corporation (YAMAHA)
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Date Time 2012-01-26 13:30:00 
Presentation Time 30 
Registration for EA 
Paper # IEICE-EA2011-108 
Volume (vol) IEICE-111 
Number (no) no.402 
Page pp.25-30 
#Pages IEICE-6 
Date of Issue IEICE-EA-2012-01-19 

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