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Paper Abstract and Keywords
Presentation 2008-08-05 10:45
Audio watermarking method based on the cochlear delay characteristics
Daiki Hamada, Masashi Unoki (JAIST) EA2008-58
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a state-of-the-art audio watermarking method, based on the properties of the human cochlear. The method is based on the concept of embedding inaudible watermarks into an original sound by controlling the phase characteristics of the sound in relation to the characteristics of cochlear delay. The method consists of two processes: data embedding and data detection. The data embedding process was carried out by applying two types of all-pass filters with the cochlear delays, and then selecting the filtered signal from them according to the watermarks. The data detection process involved by estimating the group delay of the filter from the phase difference between the original and watermarked sounds to detect the embedded data. We designed optimal group delays for the filters. We experimentally evaluated the proposed method by carrying out subjective detection tests and three objective tests of robustness (against down sampling, amplitude compression, and mp3-compression). Results showed that subjects could not detect the embedded data in any of the watermarked sounds we used, and that the proposed method precisely and robustly detected the embedded data from the watermarked sounds.
Keyword (in Japanese) (See Japanese page) 
(in English) audio watermarking / copyright protection / cochlear delay / IIR all-pass filter / group delay / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 179, EA2008-58, pp. 77-82, Aug. 2008.
Paper # EA2008-58 
Date of Issue 2008-07-28 (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 2008-08-04 - 2008-08-05 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To EA 
Conference Code 2008-08-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Audio watermarking method based on the cochlear delay characteristics 
Sub Title (in English)  
Keyword(1) audio watermarking  
Keyword(2) copyright protection  
Keyword(3) cochlear delay  
Keyword(4) IIR all-pass filter  
Keyword(5) group delay  
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1st Author's Name Daiki Hamada  
1st Author's Affiliation Japan Advanced Institute of Science and Technology (JAIST)
2nd Author's Name Masashi Unoki  
2nd Author's Affiliation Japan Advanced Institute of Science and Technology (JAIST)
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Speaker Author-2 
Date Time 2008-08-05 10:45:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2008-58 
Volume (vol) vol.108 
Number (no) no.179 
Page pp.77-82 
#Pages
Date of Issue 2008-07-28 (EA) 


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