| Presentation | 2013-03-08 Decoding methods with channel estimation for spread spectrum digital watermarking Nao TERANISHI, Masaki KAWAMURA, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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 temperature has 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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | spread spectrum watermarking / channel estimation / Nishimori temperature / simulated annealing |
| Paper # | EMM2012-118 |
| Date of Issue |
| Conference Information | |
| Committee | EMM |
|---|---|
| Conference Date | 2013/2/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Enriched Multimedia (EMM) |
|---|---|
| Language | JPN |
| 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 |
| 1st Author's Name | Nao TERANISHI |
| 1st Author's Affiliation | Graduate School of Science and Engineering, Yamaguchi University() |
| 2nd Author's Name | Masaki KAWAMURA |
| 2nd Author's Affiliation | Graduate School of Science and Engineering, Yamaguchi University |
| Date | 2013-03-08 |
| Paper # | EMM2012-118 |
| Volume (vol) | vol.112 |
| Number (no) | 467 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |