Transmission and reception of television signals to produce extended definition pictures
US4748496A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1985 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Feb 27, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method of transmitting and receiving Multiplexed Analog Component (MAC) television signals by producing first chrominance component and luminance component signals representing lines of a television signal capable of reconstruction in a conventional MAC television receiver to produce a first television picture having a first aspect ratio and a first number of lines and wherein the component signals for each line are time-compressed and placed sequentially at times appropriate to allow reconstruction of the television picture but occupying less than the whole line time, the improvement whereby further luminance component and chrominance component signals are generated and added to portions of the television signal not containing the first signals such that the further component signals are capable of being reproduced together with the first signals to produce an extended definition picture with the further component signals not interfering with the picture reproduction from the first chrominance and luminance component signals of a television picture having the first aspect ratio and first number of lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.