Hybrid coding system for moving image
US5117287A · kind A · utility
157Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Mar 1, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving image is coded through a waveform coding predictor (2), and a model-based coding predictor (3) which is mainly applicable to a head portion of a person, the coded outputs of said two predictors are compared (5) with an input current image for each block element which has for instance 8.times.8 or 16.times.16 pixels. A block element coded for the smaller difference from an input current image is taken, and is transmitted to a receiving side through differential coding (6,7). As the information compression ratio is high, a moving image can be transmitted through conventional telephone line, or a narrow band circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.