Bilateral communications system for distributing commerical and premium video signaling on an accountable basis
US3934079A · kind A · utility
172Cited by
5References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Oct 26, 1993 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2007/17372
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bilateral communications system, as for CATV application, distributes commercially available and premium video programming on a subscriber demand--directly accountable basis. At least the premium video programming is impressed on the cable in a frequency band and/or format not recoverable by a standard television receiver, absent receipt at a particular subscriber location of a reception-authorizing message from the system head end. A central processor at the system head end sequentially polls cable subscribers under stored program control, permitting bilateral digital communications between the subscriber and the head end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.