System and method for copy protection for digital signals
US7778418B1 · kind B1 · utility
2Cited by
11References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention provide for the copy protection of distributed material after conditional access is applied, regardless of where the material is distributed. The solutions described provide the advantage of being sufficiently simple in implementation to qualify as “curb high” solutions. “Curb high” solutions provide a range of security from minimal security to a high level of security while requiring relatively fewer system resources to implement than prior approaches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.