Station signature system
US4647974A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Apr 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for the automatic insertion of auxiliary video information into a television signal received at a local station from a network distribution system is provided which inserts a trigger signal into the television signal before its distributed to the local stations. The trigger signal indicates the desired timing of the insertion of the auxiliary video information. At the local stations, means are provided for generating a television signal including the auxiliary video information synchronously with the received television signal. A switch is responsive to detection of the trigger signal for providing at an output the received television signal including the desired auxiliary video information inserted therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.