Water-mark embedding method and system
US6728408B1 · kind B1 · utility
18Cited by
15References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 1, 1998 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Sep 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data embedding method and apparatus and a data reproducing method and apparatus are provided which can apply a digital watermark to various contents. Instead of embedding watermarking information in respective pixels or by using a relation between pixels, the watermarking information is embedded as a position pattern of changed pixels in the contents. Reliability comparable with conventional techniques can be obtained irrespective of a change in a smaller number of pixels for the contents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.