Signal processing for discrete-sample-type-color-video signal
US4176373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1977 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Jul 6, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Processing circuitry for discrete-sample-type-color-video signals performs an interpolation along a scan row or line to define intermediate signal levels between signal "updates" for the individual primary colors. In a preferred implementation, using green, red, and blue as primary colors, green samples occur more frequently than red or blue and interpolated green samples are specially combined to produce a "slow" green signal that is matched to the frequency ranges of the red and blue signals. The difference between the full green signal and the slow green signal is then used for producing a signal to represent high frequency luminance detail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.