Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions
US4989245A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/162
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control system and a corresponding method for controlling descrambling within a plurality of jurisdictions of scrambled programs broadcast from at least one of said jurisdictions. The control system includes a descrambler authorization system for each jurisdiction for providing authorization signals indicating whether descrambling of a predetermined program by descramblers located within the respective jurisdiction of the descrambler authorization system is authorized; means for distributing to a broadcast system the authorization signals pertaining to said predetermined program that are provided by the descrambler authorization systems for a plurality of said jurisdictions; a broadcast system for broadcasting a scrambled predetermined program and the distributed authorization signals pertaining to said predetermined program that are provided by the descrambler authorization systems for a plurality of said jurisdictions; and descramblers located in each jurisdiction for descrambling the scrambled predetermined program only when authorized by said broadcast authorization signals provided by the descrambler authorization system for the jurisdiction in which the descramblers are loc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.