Watermarking
US7130443B1 · kind B1 · utility
48Cited by
21References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2000 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Mar 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/467
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A watermarking system and method is proposed for still or moving pictures in which a watermark is embedded robustly and simply into DC-values, but without causing unacceptable visible picture degradation. The watermark is secure and can be readily detected, and the method can be used to convey additional data. Also disclosed is a method for watermarking a sequence of pictures in which the visibility of artifacts is reduced. The watermark may carry data and may be used to label a program.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.