Apparatus to display graphic messages transmitted by videotext systems
US4486779A · kind A · utility
29Cited by
2References
3Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jul 2, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Jul 2, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S348/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TV receiver is adapted to display either the regularly broadcast video signals or videotext information. The video signals contain their own internal synchronization signals. The videotext information requires locally generated synchronization signals which may be used to replace the normal video internal synchronization signals. The invention provides means for switching between the normally broadcast and the internally generated synchronization signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.