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Paper Abstract and Keywords
Presentation 2008-02-29 15:45
a digital watermarking and its new decoding method with LDPC codes, having clipping tolorance -- an application of cyclic LDPC codes and decoding using detailed reliability information --
Isao Abe, Raul Martinez-Noriega, Hyunho Kang, Brian Kurkoski, Kazuhiko Yamaguchi (UEC) IT2007-61 ISEC2007-158 WBS2007-92
Abstract (in Japanese) (See Japanese page) 
(in English) One of the important requirements for digital watermarking is robustness against clipping attacks.
Especially for audio data, an attacker can clip a part of the audio data, or shift the synchronization intentionally.
One of the other powerful attacks is MP3 compression.
The watermark system should have robustness against MP3 compression with certain bit rates as well as clipping attack.
In this study, we propose a watermarking method which has robustness against such a clipping attack
and de-synchronization based on cyclic property of error correcting code as the cyclically permutable code.
To obtain high reliability of watermarking, we use LDPC code with the cyclic property.
In the extracting stage of the watermark data,
we apply sum-product decoding algorithm using multidimensional soft-information.
In the soft-information, we newly apply power spectrum analysis of audio data with ordinary one.
Keyword (in Japanese) (See Japanese page) 
(in English) watermark / LDPC code / clipping / Sum-Product decoding / soft-information / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 501, ISEC2007-158, pp. 83-88, Feb. 2008.
Paper # ISEC2007-158 
Date of Issue 2008-02-22 (IT, ISEC, WBS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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)
Download PDF IT2007-61 ISEC2007-158 WBS2007-92

Conference Information
Committee ISEC IT WBS  
Conference Date 2008-02-28 - 2008-02-29 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2008-02-ISEC-IT-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) a digital watermarking and its new decoding method with LDPC codes, having clipping tolorance 
Sub Title (in English) an application of cyclic LDPC codes and decoding using detailed reliability information 
Keyword(1) watermark  
Keyword(2) LDPC code  
Keyword(3) clipping  
Keyword(4) Sum-Product decoding  
Keyword(5) soft-information  
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1st Author's Name Isao Abe  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Raul Martinez-Noriega  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Hyunho Kang  
3rd Author's Affiliation The University of Electro-Communications (UEC)
4th Author's Name Brian Kurkoski  
4th Author's Affiliation The University of Electro-Communications (UEC)
5th Author's Name Kazuhiko Yamaguchi  
5th Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2008-02-29 15:45:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # IT2007-61, ISEC2007-158, WBS2007-92 
Volume (vol) vol.107 
Number (no) no.499(IT), no.501(ISEC), no.503(WBS) 
Page pp.83-88 
#Pages
Date of Issue 2008-02-22 (IT, ISEC, WBS) 


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