Digital watermarking to resolve multiple claims of ownership
US6272634A · kind A · utility
243Cited by
32References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1997 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for digital watermarking to resolve multiple claims of ownership is disclosed. According to one embodiment of the invention, a first watermark requiring the host data for detection is embedded into the host data. A second watermark is also embedded into the host data. According to another embodiment of the invention, a pseudo-random sequence acting as a watermark is generated based on two random keys. One of the two random keys is related to the author of the host data into which the watermark is to be embedded, whereas the other of the two random keys is dependent on the host data itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.