Technique for encoding and decoding video with improved separation of chrominance and luminance
US4701783A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1987 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Jan 20, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/9205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method are disclosed for encoding and decoding a video signal. The standard resolution chrominance and the detail component of standard resolution luminance are encoded and transmitted in a way which allows them to be separated at the receiver without cross color. A conventional type of NTSC transmission is modified by adding together the color and the luminance signals above 2.5 megahertz, the information being repeated for two successive frames, with the color carrier reversed in phase as it normally does. At the receiver, successive frames are added and subtracted to recover the color and the luminance above 2.5 megahertz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.