Luma to chroma quantization parameter table signaling
US12143594B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jul 9, 2020 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Mar 3, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Compression technology comprises deriving chroma quantization parameter (Qpc) based on luma Qp using luma-to-chroma Qp mapping table. Such a table may be shared by the encoder and the decoder. However, in some cases, signaling such a table in the data stream instead of having it fixed by a standard may be advantageous. The syntax used to encode, signal and decode this table has a cost in terms of bitrate. The present principles propose to signaling of a luma-to-chroma mapping table in the data stream according to different embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.