System and method for copy protection for digital signals
US7403617B2 · kind B2 · utility
5Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 2004 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Mar 12, 2026 |
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.