Video predictive coding apparatus and method
US6215905A · kind A · utility
80Cited by
8References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1997 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Sep 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A predictive coding in a video coding system, which can enhance the coding efficiency by predictively coding DC coefficients of a block to be coded using DC gradients of a plurality of previously coded neighboring blocks. The predictive coefficient is selected according to the difference between the quantized DC gradients (coefficients) of a plurality of neighboring blocks of the block to be coded, and the DC coefficient of the block to be coded is predictively coded by the selected predictive coefficient, thereby enhancing the coding efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.