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Paper Abstract and Keywords
Presentation 2009-07-17 13:45
Blind Dereverberation Improved By Multi-Stage Processing
Hirofumi Nakajima (Honda Research Inst. Japan Co., Ltd.), Toru Daigo (Tokyo Denki Univ.), Kazuhiro Nakadai (Honda Research Inst. Japan Co., Ltd.), Yutaka Kaneda (Tokyo Denki Univ.), Yuji Hasegawa (Honda Research Inst. Japan Co., Ltd.) EA2009-38
Abstract (in Japanese) (See Japanese page) 
(in English) This paper addresses a high performance dereverberation method based on a multi-stage processing technique.
The multiple-input dereverberation method is treated as an intermediate processing module that connects the outputs of the modules on a previous stage to the inputs of other modules on the next stage.
The Semi-Blind MINT method (SBM) and Real-time Decorrelation-based Adaptive Inverse Filter method (RDAIF) are used in this paper.
Since the performance changes depending on the input channel combination of each module, we propose two additional processes: channel selection and delay addition in order to get good input channel combinations.
The results of each process show the folling:
(1) Channel selection: The reverberation suppression performance is changed by 3-10\,dB depending on the input channel combination.
The optimum combination can reduce the number of input channels without degrading suppression performance.
(2) Delay addition: Delay addition can improve the suppression performance by 3-10\,dB.
The improvement is especially big when the performance is poor without applying this method.
(3) Multi-stage process: The suppression performance using the proposed multi-stage process for SBM and RDAIF are 18.2\,dB and 13.6\,dB, respectively, while the conventional methods achieved only 14.6\,dB and 3.5\,dB, respectively.
We can conclude that the proposed processes are effective to improve reverberation performance.
Keyword (in Japanese) (See Japanese page) 
(in English) Blind de-reverberation / Semi-Blind MINT / DAIF / RDAIF / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 136, EA2009-38, pp. 7-12, July 2009.
Paper # EA2009-38 
Date of Issue 2009-07-10 (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 EA2009-38

Conference Information
Committee EA  
Conference Date 2009-07-17 - 2009-07-17 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EA 
Conference Code 2009-07-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Blind Dereverberation Improved By Multi-Stage Processing 
Sub Title (in English)  
Keyword(1) Blind de-reverberation  
Keyword(2) Semi-Blind MINT  
Keyword(3) DAIF  
Keyword(4) RDAIF  
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1st Author's Name Hirofumi Nakajima  
1st Author's Affiliation Honda Research Institute Japan Co., Ltd. (Honda Research Inst. Japan Co., Ltd.)
2nd Author's Name Toru Daigo  
2nd Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
3rd Author's Name Kazuhiro Nakadai  
3rd Author's Affiliation Honda Research Institute Japan Co., Ltd. (Honda Research Inst. Japan Co., Ltd.)
4th Author's Name Yutaka Kaneda  
4th Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
5th Author's Name Yuji Hasegawa  
5th Author's Affiliation Honda Research Institute Japan Co., Ltd. (Honda Research Inst. Japan Co., Ltd.)
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Speaker Author-1 
Date Time 2009-07-17 13:45:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2009-38 
Volume (vol) vol.109 
Number (no) no.136 
Page pp.7-12 
#Pages 6 
Date of Issue 2009-07-10 (EA) 

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