Motion estimation or P-type images using direct mode prediction
US7702168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Aug 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The process for coding the current block comprises a step of selecting the predicted block from among candidate blocks, the selection being dependent on a difference DBdrx,dry between the co-located block of the current image block lying in an image of type B and the block of a reference image, the latter block being designated by the motion vector with components drx, dry which is allocated to co-located block and which is colinear with the motion vector Vp allocated to the current block and designating the candidate block. The process relates to data compression, the transmission of digital images using the video coding standard comprising a direct prediction mode, for example the h263, MPEG4 or h261 standard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.