System for the transmission and reception of high-definition television pictures in narrow-band channels
US4785348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Nov 3, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for the transmission of high-definition television pictures in narrow-band channels, and a transmitter and a receiver appropriate to the system. The system includes a transmitting section (10) and a receiving section (20). To transmit the picture via a narrow-band channel (30), the picture produced by a camera (35) is subsampled by a circuit (40). One filter out of a plurality of anti-aliasing filters (F1, F2, . . . , Fn) is selected by means of a movement detector (48); the information of this detector is also transmitted to the receiving section (20) to select, in agreement therewith, one filter output of a plurality of filters (I1, I2, . . . , In) to be used for the oversampling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.