Transform size interactions with coding tools
US12425654B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Sep 8, 2020 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Sep 8, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for implementing Discrete Trigonometric transforms are based on maximum transform size. In one embodiment, matrix-based intra prediction is enabled for coding unit sizes up to a specified size, regardless of the maximum transform size. In another embodiment, low-frequency non-separable transforms are used to improve coding gain. Syntax in a bitstream can be used to indicate a coding tool that is used.
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