Method for separating the luminance and chrominance signals of a PAL or SECAM composite video signal and a device for the practical application of said method
US4814862A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Dec 28, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The luminance and chrominance signals of a or SECAM composite video signal are separated by means of a method comprising the following steps: PA1 sampling and digitizing the composite video signal; PA1 determination of a luminance signal and a chrominance signal by means of a first processing channel, from the digital sample of the current point of the image, from a previous sample corresponding to the current point located on the line in the previous field which is spatially positioned in the image immediately beneath the current line, from the luminance signal values already determined in a spatiotemporal neighborhood of the current point and in accordance with an analysis of the local spatiotemporal context of the current point; PA1 determination of a luminance signal and a chrominance signal by means of a second processing channel by applying the digital composite signal to the input respectively of a luminance filter and a chrominance filter; PA1 selection of the luminance and chrominance signals which are present at the output of the first processing channel or of the second processing channel as a function of an analysis of the local spatiotemporal context of the point perfo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.