System for distributing broadcast television services identically on a first bandwidth portion of a plurality of express trunks and interactive services over a second bandwidth portion of each express trunk on a subscriber demand basis
US5557316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1994 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Sep 29, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2007/1739
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An interactive television information system having a node in television communication between a source of television information services and a plurality of home interface controllers. Each subscriber television is associated with a home interface controller. The home interface controllers receive the television information signals and include a data transceiver for data communications with the node. Express trunks deliver television information services to groups of subscribers. Each trunk includes a first bandwidth portion for carrying broadcast television signals in the same manner on each trunk. A second bandwidth portion carries television information services on a demand basis. The node responds to subscriber requests by selecting television information services for delivery over the second bandwidth portion of the express trunk coupled to the requesting home interface controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.