Electronic ticket method and apparatus for television signal scrambling and descrambling
US4663664A · kind A · utility
18Cited by
11References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1983 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Oct 31, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49155
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic ticket for descrambling transmitted video program and synchronization signals for use in a video receiver comprising first terminals for receiving the scrambled video signals, a descrambling circuit having its input coupled to the first terminals and producing at least a partially descrambled signal at its output, second terminals for coupling the descrambled signal to the video receiver and enclosing portions of the first and second terminals, and the descrambling circuit in a unitary package whereby the ticket can be used as a plug-in unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.