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Paper Abstract and Keywords
Presentation 2015-01-29 13:45
Introduction of concatenated codes for digital watermarking
Nobuhiro Hirata, Masaki Kawamura (Yamaguchi Univ.) EMM2014-75
Abstract (in Japanese) (See Japanese page) 
(in English) We show that concatenated codes, which are combinations of error-correcting codes, can improve performance of watermarking.
In digital image watermarking, it is required to achieve high quality image and to extract watermarks with few errors.
The way to extract them without errors is to introduce error-correcting codes.
However, image quality becomes worse due to increasing the code length of watermarks.
Therefore, we want to use such error-correcting codes that they have high capability of error-correcting but their code length is short.
We introduce concatenated codes.
By combining two error-correcting codes, the codes can have high capability of error-correcting, and also their code length can be shorter.
In this report, we evaluated some combinations of error-correcting codes, e.g., BCH, Reed-solomon, Sourlas and LDPC codes, in order to choose best combination.
In the result, the combination of BCH and LDPC codes is the best concatenated code.
This concatenated code can improve PSNR by $2.48$ dB and its code length can be $34.6%$ shorter than one of hitherto proposed method which uses both LDPC and repetition codes.
Keyword (in Japanese) (See Japanese page) 
(in English) digital watermark / concatenated codes / BCH codes / Reed-solomon codes / Sourlas codes / LDPC codes / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 424, EMM2014-75, pp. 51-56, Jan. 2015.
Paper # EMM2014-75 
Date of Issue 2015-01-21 (EMM) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee EMM  
Conference Date 2015-01-28 - 2015-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMM 
Conference Code 2015-01-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Introduction of concatenated codes for digital watermarking 
Sub Title (in English)  
Keyword(1) digital watermark  
Keyword(2) concatenated codes  
Keyword(3) BCH codes  
Keyword(4) Reed-solomon codes  
Keyword(5) Sourlas codes  
Keyword(6) LDPC codes  
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Keyword(8)  
1st Author's Name Nobuhiro Hirata  
1st Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
2nd Author's Name Masaki Kawamura  
2nd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2015-01-29 13:45:00 
Presentation Time 30 minutes 
Registration for EMM 
Paper # EMM2014-75 
Volume (vol) vol.114 
Number (no) no.424 
Page pp.51-56 
#Pages
Date of Issue 2015-01-21 (EMM) 


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