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Paper Abstract and Keywords
Presentation 2018-01-29 14:00
Study on restoration of a spatio-temporal sound pressure distribution image obtained with a microphone array
Kenji Ozawa, Masaaki Ito, Genya Shimizu, Eri Takizawa, Masanori Morise (Univ. Yamanashi), Shuichi Sakamoto (Tohoku Univ.) EMM2017-66
Abstract (in Japanese) (See Japanese page) 
(in English) This project aims to achieve sound source separation by two-dimensional fast Fourier transform (2D-FFT) of a spatio-temporal sound pressure distribution image that is composed from the outputs of a microphone array. A target sound that arrives from the front of the array forms a vittate image and thus it appears as direct current (DC) components in the vertical direction in the 2D-FFT spectrum. Noise suppression was intended by the spectral subtraction, in which the noise DC components were estimated in the spectrum by artificial neural networks. As a result, the proposed array processing method with 14-cm length array achieved the comparable performance of a conventional delay and sum beamformer with an approximately 80-cm length array. The restoration of a spatio-temporal sound pressure distribution image of an array with densely spaced microphones was attempted using the image from an array with sparsely spaced microphones. The results suggest that a sufficient performance can be obtained for the telephone speech frequency band.
Keyword (in Japanese) (See Japanese page) 
(in English) Micro-spaced microphone array / Spatio-temporal sound pressure distribution image / Image signal processing / Two-dimensional FFT / Sound source separation / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 425, EMM2017-66, pp. 1-6, Jan. 2018.
Paper # EMM2017-66 
Date of Issue 2018-01-22 (EMM) 
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 EMM  
Conference Date 2018-01-29 - 2018-01-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. (Aobayama Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Sense of Presence, Universal Media, Digital Entertainment, etc. 
Paper Information
Registration To EMM 
Conference Code 2018-01-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on restoration of a spatio-temporal sound pressure distribution image obtained with a microphone array 
Sub Title (in English)  
Keyword(1) Micro-spaced microphone array  
Keyword(2) Spatio-temporal sound pressure distribution image  
Keyword(3) Image signal processing  
Keyword(4) Two-dimensional FFT  
Keyword(5) Sound source separation  
Keyword(6)  
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1st Author's Name Kenji Ozawa  
1st Author's Affiliation University of Yamanashi (Univ. Yamanashi)
2nd Author's Name Masaaki Ito  
2nd Author's Affiliation University of Yamanashi (Univ. Yamanashi)
3rd Author's Name Genya Shimizu  
3rd Author's Affiliation University of Yamanashi (Univ. Yamanashi)
4th Author's Name Eri Takizawa  
4th Author's Affiliation University of Yamanashi (Univ. Yamanashi)
5th Author's Name Masanori Morise  
5th Author's Affiliation University of Yamanashi (Univ. Yamanashi)
6th Author's Name Shuichi Sakamoto  
6th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2018-01-29 14:00:00 
Presentation Time 25 minutes 
Registration for EMM 
Paper # EMM2017-66 
Volume (vol) vol.117 
Number (no) no.425 
Page pp.1-6 
#Pages 6 
Date of Issue 2018-01-22 (EMM) 

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