Process for converting the representation of a video image between two coding systems
US6323872A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/67
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a process for converting the representation of a video image between two coding systems with the aid of two respective sets of parameters, in which each set of parameters is deduced from the other by means of a matrix transformation. For each parameter of the set to be converted from the first coding system to the second coding system, a breakdown (11A, 11B, 11C; 12A, 12B, 12C) is selected in the parameters of the second coding system representing the value of the parameter in the matrix transformation. The breakdowns of each of the parameters to be converted are added and may then be shifted and reorganized. Each of the parameters of the two coding systems have ranges of authorized values. In the conversion process, the values of the parameters to be converted and/or the values of the converted parameters that are outside the corresponding ranges of values are clipped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.