Method and apparatus for standardizing nonstandard video signals
US4500908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1982 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Jun 18, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/641
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are disclosed for converting nonstandard video signals, such as generated by popular micro computers to N.T.S.C. video standard signals. The nonstandard video is digitized and temporarily stored in one or more line memories. The data is then removed from the line memories by a clock signal related to a N.T.S.C. source. A luminance and chrominance converter circuit converts the horizontal scan frequency from an even harmonic to an odd harmonic of the color subcarrier so that the luminance information is properly related to the horizontal timing and chrominance is properly related to the color subcarrier. The corrected signal can be gen-locked to an external video signal and superimposed on such external signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.