Context determination for entropy coding of run-length encoded transform coefficients
US10291912B2 · kind B2 · utility
2Cited by
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Key dates
| Filing date | Jan 16, 2013 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Mar 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and devices for encoding and decoding video using mode-dependent context determination in the case of level-run pair coding of transform coefficients are described. Intra-coding modes may be grouped into classes and each class may be associated with a partitioning of a coefficient group into regions. The region in which a coefficient falls determines, in part, the context selected for encoding bins associated with that coefficient, including a level, if the coefficient is non-zero, and a run if the coefficient correspond to the bin of a binarized run value.
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