Motion-compensated spatio-temporal wavelet compression of video data with optimised permutation of the frames
US8094718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2005 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Feb 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In video encoding, the video frames are spatio-temporally filtered for reduction of spatial and temporal redundancy before they are entropy encoded. Known filtering schemes consider temporally successive frames and are static. It is probable but not necessary that successive frames are most efficient to encode. Therefore, a plurality or all possible frame order permutations are considered for a group of frames (GOP) and evaluated based on a global criterion, which is the sum of local criterion values computed over successive subsets of permuted frames. The local criterion value is deduced from motion estimation processed on each considered set of frames. The best ordering is chosen as the one that minimizes the global criterion value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.