Teletext decoder
US4667235A · kind A · utility
36Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1983 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Jul 5, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0882
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A teletext decoder having a character pickup circuit superior in the antinoise property and response characteristic by allowing signals only in the vicinity of clock run-in signals to pass, simultaneously detecting the amplitude of clock run-in signals through a band-pass filter circuit, gating framing code signals and reproduced clock and slice data, and integrating and holding the clock run-in signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.