System for encoding and decoding video signals
US4533936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Mar 28, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0806
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first video signal is provided comprising a plurality of lines of a luminance signal, a first color signal and a second color signal, each of the lines having a duration of a first predetermined time. Each of the nonoverlapping pairs of successive lines of the luminance signal are summed and differenced to provide a luminance sum signal and a luminance difference signal. Each of the nonoverlapping pairs of successive lines of the first color signal and also of the second color signal are summed to provide a first color sum signal and a second color sum signal. The luminance difference signal, the first color sum signal and the second color sum signal are bandwidth limited in relation to the luminance sum signal. Corresponding lines of these signals are time compressed to the same bandwidth and then time multiplexed to form a corresponding line of a first compound signal, each line of which has a duration of the aforementioned predetermined time, and alternate lines of which have zero amplitude. A second video signal is similarly processed to provide a second compound signal. The first and second compound signals are interleaved to form a third compound signal such that the time o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.