Generational copy control of a video signal
US6701062B1 · kind B1 · utility
26Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1999 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Jun 8, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91335
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for providing generational copy control of a video signal. A digital video signal contains content information, first supplemental information and second supplemental information. The first supplemental information is represented by a watermark pattern, the second by a control pattern. Copying of the content information is only permitted if a predetermined combination of the first and second supplemental information is present. Pseudo-sync pulses are added to a blanking interval of an analog video signal converted from a digital video signal, the pulses representing the second supplemental information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.