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Paper Abstract and Keywords
Presentation 2015-07-03 10:30
Diffuse Noise Suppression by Spatial Cross Spectrum Estimation Considering the Overlap of Beam
Mizuki Ohno, Akitoshi Kataoka (Ryukoku Univ.) EA2015-3
Abstract (in Japanese) (See Japanese page) 
(in English) As diffuse noise suppression method using a microphone array, the suppression technique using both the beamformer and the Wiener post-filter have been proposed.When using a large-sized microphone array with sufficient element spacing, target signal is estimated in diffuse noise field by calculating the inter-channel cross-spectrum of the microphone array[1].On the other hand,when using a small-sized microphone array is able to estimate the post-filter by calculating coherence function between channels of diffuse noise,however,it is necessary to estimate the noise section with high accuracy by using voice activity detection(VAD) etc[2].In this paper,to realize the Wiener post-filter that does not require VAD and can be implemented to small-sized microphone array, and focused on the difference of the directivity of the target source and diffuse noise,We propose a method of estimating diffuse noise with no directivity by using spatial cross spectrum.Moreover,in order to estimate the diffuse noise more accurately, we study a technique of suppressing variations in the response to the angle and frequency in the spatial cross spectrum estimation.
Keyword (in Japanese) (See Japanese page) 
(in English) microphone array / diffuse noise suppression / beamformer / Wiener post-filter / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 126, EA2015-3, pp. 11-16, July 2015.
Paper # EA2015-3 
Date of Issue 2015-06-26 (EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee EA  
Conference Date 2015-07-03 - 2015-07-03 
Place (in Japanese) (See Japanese page) 
Place (in English) The Univ. of Electro-Communications, 80th Anniversary Memorial Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General topics, Interactive Acquisition and Reproduction 
Paper Information
Registration To EA 
Conference Code 2015-07-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Diffuse Noise Suppression by Spatial Cross Spectrum Estimation Considering the Overlap of Beam 
Sub Title (in English)  
Keyword(1) microphone array  
Keyword(2) diffuse noise suppression  
Keyword(3) beamformer  
Keyword(4) Wiener post-filter  
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1st Author's Name Mizuki Ohno  
1st Author's Affiliation Ryukoku University (Ryukoku Univ.)
2nd Author's Name Akitoshi Kataoka  
2nd Author's Affiliation Ryukoku University (Ryukoku Univ.)
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Speaker Author-1 
Date Time 2015-07-03 10:30:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2015-3 
Volume (vol) vol.115 
Number (no) no.126 
Page pp.11-16 
#Pages
Date of Issue 2015-06-26 (EA) 


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