Digital watermark embedding method, digital watermark extracting method, recording medium, image recording device, and image replaying device
US6898297B2 · kind B2 · utility
22Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2001 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | May 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embedding data to be embedded as a digital watermark is acquired. Packing data is formed in which the embedding data is repeatedly connected three times or more sequentially without interval. Real embedding information is formed such that a redundancy bit with a fixed length that is used for an error correction of an information bit is added immediately after the information bit in which the packing data is subdivided into data each having a fixed length. The real embedding information is embedded into the image data itself. The embedding mechanism for the information is not easily understood, and security level is high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.