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Paper Abstract and Keywords
Presentation 2013-12-13 14:15
Improving the quality of speech signals captured by a short aperture microphone array
Masaru Niu, Yuki Abe, Takeshi Saitou, Masato Miyoshi (Kanazawa Univ.) EA2013-91
Abstract (in Japanese) (See Japanese page) 
(in English) It would be effective to use a sharp directional beam for clearly recording distant speech. The lower bound frequency of such a directional beam depends on the aperture length of a microphone array. Speech captured with a short aperture array, therefore, would be degraded in low frequencies. In this report, the VB (Virtual Bass) method is applied to speech received with a short aperture microphone array. This method is a bass-augmentation processing based on the psychoacoustic phenomenon “missing fundamental.” We conducted a CMOS (Comparison Mean Opinion Score) experiment to evaluate VB-processed speech, varying the lower bound frequency of a directional beam (the aperture length of a microphone array). The experimental result shows that the quality of VB-processed speech, when captured through a beam of which lower bound frequency was up to 0.6 kHz, is almost the same as that of (non-processed) speech captured through a beam of 0.3-kHz lower bound frequency.
Keyword (in Japanese) (See Japanese page) 
(in English) microphone array / directional beam / aperture / missing fundamental / VB method / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 349, EA2013-91, pp. 19-24, Dec. 2013.
Paper # EA2013-91 
Date of Issue 2013-12-06 (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)
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Conference Information
Committee EA  
Conference Date 2013-12-13 - 2013-12-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Satellite Plaza of Kanazawa University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General topics 
Paper Information
Registration To EA 
Conference Code 2013-12-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving the quality of speech signals captured by a short aperture microphone array 
Sub Title (in English)  
Keyword(1) microphone array  
Keyword(2) directional beam  
Keyword(3) aperture  
Keyword(4) missing fundamental  
Keyword(5) VB method  
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1st Author's Name Masaru Niu  
1st Author's Affiliation Kanazawa University (Kanazawa Univ.)
2nd Author's Name Yuki Abe  
2nd Author's Affiliation Kanazawa University (Kanazawa Univ.)
3rd Author's Name Takeshi Saitou  
3rd Author's Affiliation Kanazawa University (Kanazawa Univ.)
4th Author's Name Masato Miyoshi  
4th Author's Affiliation Kanazawa University (Kanazawa Univ.)
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Speaker Author-1 
Date Time 2013-12-13 14:15:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2013-91 
Volume (vol) vol.113 
Number (no) no.349 
Page pp.19-24 
#Pages 6 
Date of Issue 2013-12-06 (EA) 

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