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Paper Abstract and Keywords
Presentation 2008-07-18 13:00
Timing optimization of basis vector replacement in compressive coding of stereo audio signal using cosine-distance weighted K-means
Keisuke Masatoki, Shigeki Miyabe, Hiroshi Saruwatari, Kiyohiro Shikano (NAIST), Toshiyuki Nomura (NEC) EA2008-37
Abstract (in Japanese) (See Japanese page) 
(in English) For multi-channel audio system which becomes widely used, it is a serious problem to increase transmission quantity of the signal. In this paper, we propose a new compressive coding of audio signal using cosine-distance
weighted K-means as compressive technique with high quality and low bit rates. This method can obtain basis vectors which minimize error between decoded signals and original signals, and we can provide a single channel
signal by using basis vector. However, the sound quality degrades if we do not replace basis vector in time for changing composition of the musical instruments. It is because besis vector we obtained is time invariant, so the compression distortion is not always minimized. The automatic algorithm of replacement of besis vector still remains as undeveloped issue. Therefore, we introduce an optimization algorithm of basis vector replacement. Experimental result shows that our algorithm can archieve a minimization of the compression distortion and the best replacement timing of the basis vector.
Keyword (in Japanese) (See Japanese page) 
(in English) Multi-channel audio signal / compressive coding / K-means / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 143, EA2008-37, pp. 1-6, July 2008.
Paper # EA2008-37 
Date of Issue 2008-07-11 (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 2008-07-18 - 2008-07-18 
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 2008-07-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Timing optimization of basis vector replacement in compressive coding of stereo audio signal using cosine-distance weighted K-means 
Sub Title (in English)  
Keyword(1) Multi-channel audio signal  
Keyword(2) compressive coding  
Keyword(3) K-means  
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1st Author's Name Keisuke Masatoki  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Shigeki Miyabe  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Hiroshi Saruwatari  
3rd Author's Affiliation Nara Institute of Science and Technology (NAIST)
4th Author's Name Kiyohiro Shikano  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
5th Author's Name Toshiyuki Nomura  
5th Author's Affiliation NEC Corporation Common Platform Software Research Laboratories (NEC)
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Speaker Author-1 
Date Time 2008-07-18 13:00:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2008-37 
Volume (vol) vol.108 
Number (no) no.143 
Page pp.1-6 
#Pages 6 
Date of Issue 2008-07-11 (EA) 

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