Video coding using reference motion vectors
US9485515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2013 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jul 23, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques are described to use a reference motion vector to reduce the amount of bits needed to encode motion vectors for inter prediction. One method includes identifying a candidate motion vector used to inter predict each of a plurality of previously coded blocks to define a plurality of candidate motion vectors, identifying a set of reconstructed pixel values corresponding to a set of previously coded pixels for the current block, and generating, using each candidate motion vector, a corresponding set of predicted values for the set of previously coded pixel values within each reference frame of a plurality of reference frames. A respective error value based on a difference between the set of reconstructed pixel values and each set of predicted values is used to select a reference motion vector from the candidate motion vectors that is used to encode the motion vector for the current block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.