Digital television system
US4027331A · kind A · utility
116Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Jul 24, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital transmission system for television signals in which signals are transmitted only in respect of picture elements which differ from those in the preceding frame, the signals being in differential pulse code modulation form and means is provided for smoothing the transistion between those parts of a frame which are to be updated by the signals and those parts which are unchanged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.