System for encoding broadcast quality television signals to enable transmission as an embedded code
US4858005A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Oct 14, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a system of encoding broadcast-quality television signals to enable their transmission as a embedded code. A preferred embodiment provides a hybrid interpolative/predictive coding algorithm acting on all sampled sites of a television signal. One sub-set of samples are adaptively interpolatively coded; a 3-state interpolator switching signal is produced at each site, redundancy is removed and the signal transmitted. The interpolator switching signal also acts as a descriptor at sites surrounded each sample to be predicted. Adaptive prediction is used for the other sub-set of samples the particular predictor used at a sample site being determined by the surrounding descriptors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.