Intra prediction mode selection in video coding
US10171819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2016 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Mar 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/154
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for encoding a digital video with a video encoder that allows intra prediction of mode selection. The method includes dividing pixels from each intra prediction block into four groups based on phases of the pixels, progressively narrowing down a list of intra prediction modes over a series of stages based on a comparison of a cost value for each intra prediction mode at that stage against a threshold value, tentatively assigning the remaining intra prediction with the lowest cost value after the final stage to the block, calculating a heterogeneity index for each group of contiguous intra prediction blocks based on the tentative intra prediction mode selected for each block after the final stage, and finalizing the tentative intra prediction mode for each block if the group has a heterogeneity index above a predetermined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.