Processing copy protection signals
US7310819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2002 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Mar 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91335
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device if or recording an information signal with first copy protection information to a storage medium includes recording according to first copy rules identified by the first copy protection information. The first copy protection information identifying the first copy rules is detected, and at least second copy protection information is recorded according to the detected first copy rules. The first and second copy protection information identify a legality message to be interpreted by reader. Screening information is recorded in a safe way on the storage medium to identify that the first copy protection message has been read.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.