Method and device for forming a compressed transcoded digital image signal
US7580578B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2004 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Oct 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A compressed transcoded digital image signal is formed from a compressed original digital image signal having digital data organized in blocks. A data block in one of the compressed signals between the compressed transcoded digital image signal and the compressed original digital image signal is selected by identifying the spatial position of the data block in one of the compressed signals. The spatial position of a dual data block corresponding to the selected data block is identified in the non selected compressed signal, having regard to a given geometric transformation applied to this block. The data block belonging to the compressed original signal is decoded and the given geometric transformation is applied to the selected, decoded data block. The geometrically transformed data block is coded and the first, coded data block is inserted in the compressed transcoded image signal at the position of its dual block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.