Encoder for superimposing encoded character data or command data in the vertical blanking interval for regulating video receiver functions
US5311311A · kind A · utility
26Cited by
12References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Mar 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoder disconnects video data between a video source and a video using device only during 21H in the vertical blanking interval. During 21H, it applies locally generated coded data signals, in a format detectable by conventional data decoding devices, to the video using device. The video source may be a camera or tape playback, and the using device may be a TV set or a video tape recorder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.