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Paper Abstract and Keywords
Presentation 2007-09-28 14:00
Fast Algorithm for Cancellation of Near Point Source Based on Independent Component Analysis
Keiichi Osako, Yu Takahashi, Yoshimitsu Mori, Hiroshi Saruwatari, Kiyohiro Shikano (NAIST) EA2007-57
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a fast algorithm for cancellation of near point source based on independent component analysis (ICA).
A hands-free speech recognition system requires a precise and fast algorithm for enhancing target speech and reducing interference sound sources.
In a hands-free speech recognition system at a real environment, the following acoustic scenario often arises; a target speech which can be approximately regarded as a point source is close to the microphone array, and noises which cannot be regarded as point sources are far from the microphone array compared with target speech.
In such a case, blind spatial subtraction subtraction array (BSSA) has been proposed to extract a target speech.
BSSA utilizes source separation based on ICA as a noise estimator, and achieves target speech extraction by spectral subtraction.
In BSSA, using ICA as noise estimator is due to the fact that ICA is proficient in noise estimation which equals near-point-source cancellation. In this paper, first, we theoretically prove that ICA is proper for noise estimation and show the results of simulation for its validity.
Next, we propose a new fast algorithm for cancellation of near point source based on ICA.
Finally, the effectiveness of the proposed algorithm is revealed in the target speech extraction experiment by BSSA which introduces the proposed algorithm.
Keyword (in Japanese) (See Japanese page) 
(in English) blind source separation / independent component analysis / microphone array signal processing / DOA estimation / acoustic signal processing / speech enhancement / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 240, EA2007-57, pp. 13-18, Sept. 2007.
Paper # EA2007-57 
Date of Issue 2007-09-21 (EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EA2007-57

Conference Information
Committee EA  
Conference Date 2007-09-28 - 2007-09-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Nara Institute of Science and Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To EA 
Conference Code 2007-09-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fast Algorithm for Cancellation of Near Point Source Based on Independent Component Analysis 
Sub Title (in English)  
Keyword(1) blind source separation  
Keyword(2) independent component analysis  
Keyword(3) microphone array signal processing  
Keyword(4) DOA estimation  
Keyword(5) acoustic signal processing  
Keyword(6) speech enhancement  
Keyword(7)  
Keyword(8)  
1st Author's Name Keiichi Osako  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Yu Takahashi  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Yoshimitsu Mori  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
4th Author's Name Hiroshi Saruwatari  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
5th Author's Name Kiyohiro Shikano  
5th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2007-09-28 14:00:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2007-57 
Volume (vol) vol.107 
Number (no) no.240 
Page pp.13-18 
#Pages 6 
Date of Issue 2007-09-21 (EA) 

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