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Paper Abstract and Keywords
Presentation 2016-07-07 13:20
Post-filtering for reverberation suppression using priori DRR estimation on multiple isotropic beams
Yuhei Yamamoto, Yoichi Haneda (UEC) EA2016-9
Abstract (in Japanese) (See Japanese page) 
(in English) Reverberation often degenerates the quality of speech signals.
The beamforming technique is a promising approach for speech enhancement;
however, it is impossible to suppress the reverberation arriving from the target direction for beamforming.
In this paper, we use a non-linear post-filtering method based on Wiener filter.
The post-filter can suppress the reverberation from the output of beamforming
when the power spectral density (PSD) of the residual reverberation is estimated.
Assuming that reverberation arrives isotropically,
the reverberation PSD which is contained by multiple isotropic beams on a spherical microphone array will be equivalent.
Based on the estimated priori direct--to--reverberation ratio (DRR) on each beams, we use the beam outputs less affected by direct sound as the estimated reverberation PSD to calculate the post-filter.
The experimental results show that the post-filter using proposed method is effective for suppressing reverberation and background noise.
Keyword (in Japanese) (See Japanese page) 
(in English) Dereverberation / Spherical microphone array / Beamforming / Spherical harmonics / Post-filter / Power spectral density / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 122, EA2016-9, pp. 13-18, July 2016.
Paper # EA2016-9 
Date of Issue 2016-06-30 (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 EA2016-9

Conference Information
Committee EA  
Conference Date 2016-07-07 - 2016-07-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Yamaha, Toyooka Factory 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General topics 
Paper Information
Registration To EA 
Conference Code 2016-07-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Post-filtering for reverberation suppression using priori DRR estimation on multiple isotropic beams 
Sub Title (in English)  
Keyword(1) Dereverberation  
Keyword(2) Spherical microphone array  
Keyword(3) Beamforming  
Keyword(4) Spherical harmonics  
Keyword(5) Post-filter  
Keyword(6) Power spectral density  
Keyword(7)  
Keyword(8)  
1st Author's Name Yuhei Yamamoto  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Yoichi Haneda  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2016-07-07 13:20:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2016-9 
Volume (vol) vol.116 
Number (no) no.122 
Page pp.13-18 
#Pages 6 
Date of Issue 2016-06-30 (EA) 

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