Chroma quantization parameter extension
US11445192B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Aug 17, 2020 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Aug 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The quantization parameters (QP) for Chroma are extended up to and more preferably to the same range as Luma QP (e.g., 0 to 51). Previous, values of Chroma QP only extended up to 39. Techniques are provided for determining extended Chroma QP values (e.g., for Cr and Cb) based on the Luma QP and picture level chroma offsets. In one preferred embodiment, slice level offsets are added making the method particularly well-suited for slice level parallel processing. The extension of Chroma QP enhances functionality, flexibility and friendliness of the High Efficiency Video Coding (HEVC) standard for various applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.