Image encoding or decoding method and device, with parallelization of processing over several processors and coprocessors, corresponding computer-readable storage medium
US8111749B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2009 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Jul 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is proposed for encoding/decoding an image having rectangular blocks of pixels. The image has a height of H blocks and a width of W blocks and is divided into vertical (or horizontal) bands of blocks having the height of H (or width of W) blocks. The method includes: obtaining N processors and M coprocessors, the M coprocessors distributed over S levels, N>1, S>0 and M>S; assigning the N processors Pi to N contiguous bands BPi having sizes of Ki blocks, 0≦i≦N−1 andfor every level of coprocessors s, 0≦s≦S−1, assigning Ms coprocessors CPs,j to Ms contiguous bands having sizes of Qs,j blocks, with:managing sending of first, second and third start messages, and first and second verification messages to the processors and coprocessors, according to a predetermined set of rules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.