System of transmitting high-definition television pictures via a narrow-passband channel
US4922342A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Mar 24, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A transmission system for TV transmission in the D2 MAC/packet mode includes a transmission part formed by an arrangement (1) for supplying pictures constituted by a plurality of picture elements or samples distributed over even and odd lines, a filter member (22) for filtering the samples of the filtered samples, a sub-sampling circuit (20) for taking certain samples from the output of the filter member, and the output of a transmitter circuit (5) for transmitting through the channel the samples taken, and also includes at least one receiving part constituted by a receiving circuit (10) for receiving the samples taken, an interpolation member (41) for recovering samples from the samples received and a first display circuit (50) for converting the recovered and received samples into a high-definition restituted picture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.