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| Presentation | 2013-03-08 11:45 Decoding methods with channel estimation for spread spectrum digital watermarking Nao Teranishi, Masaki Kawamura (Yamaguchi Univ.)  EMM2012-118 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We propose methods to estimate optimal temperature for decoder in spread spectrum watermarking. Semi-optimal decoders based on Bayes estimation have been proposed. Decoding with Nishimori temperature has better performance, when we know the power of channel noise. Finite-Simulated Annealing method annealing to certain temperaturehas more robustness even if the decoding temperature is far from the optimal one. However, it is necessary to estimate optimal temperature. We, therefore, proposed two temperature parameter estimations; estimation using expected value of estimated messages and one using statistic calculation. We also evaluated performance of the finite-SA method using these estimated temperatures. As the results, both estimations have good performance for natural images, and also for artificial images which have large embedding errors, the former estimation can estimate appropriate temperature adapted to the errors. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | spread spectrum watermarking / channel estimation / Nishimori temperature / simulated annealing / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 467, EMM2012-118, pp. 65-70, March 2013. | |
| Paper # | EMM2012-118 | |
| Date of Issue | 2013-02-28 (EMM) | |
| 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) | |
| Download PDF | EMM2012-118 |
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| Conference Information | |
| Committee | EMM |
| Conference Date | 2013-03-07 - 2013-03-08 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | EMM |
| Conference Code | 2013-03-EMM |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Decoding methods with channel estimation for spread spectrum digital watermarking |
| Sub Title (in English) | |
| Keyword(1) | spread spectrum watermarking |
| Keyword(2) | channel estimation |
| Keyword(3) | Nishimori temperature |
| Keyword(4) | simulated annealing |
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| Keyword(8) | |
| 1st Author's Name | Nao Teranishi |
| 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 | 2013-03-08 11:45:00 |
| Presentation Time | 30 minutes |
| Registration for | EMM |
| Paper # | EMM2012-118 |
| Volume (vol) | vol.112 |
| Number (no) | no.467 |
| Page | pp.65-70 |
| #Pages | 6 |
| Date of Issue | 2013-02-28 (EMM) |
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