Derivation of quantization matrices for joint Cb-Br coding
US12206852B2 · kind B2 · utility
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Key dates
| Filing date | Sep 24, 2020 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Feb 10, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reconstructing a block of an image, said block comprising a plurality of components and being predictively encoded from a reference block, includes if a single quantized residual block is used to jointly encode at least two components of the plurality of components, deriving at least one quantization matrix from a plurality of scaling lists each defined for one component of the plurality of components; and, applying one of the at least one derived quantization matrix to the single quantized residual block to obtain a reconstructed residual block for each of the at least two components.
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