Methods for quantization parameter control for video coding with joined pixel/transform based quantization
US11558616B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2021 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Mar 4, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/98
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An example device for processing video data includes memory configured to store the video data and one or more processors coupled to the memory. The one or more processors are configured to adjust a chroma dynamic range adjustment (DRA) scale value based on a luma DRA scale value and determine a chroma quantization parameter (QP) based on the luma adjusted chroma DRA scale value, wherein the chroma QP comprises an integer component and a fractional component. The one or more processors are configured to determine an integer chroma QP offset based on the integer component and determine a fractional chroma QP offset based on the fractional component. The one or more processors are configured to determine a DRA chroma scale adjustment value based on the integer chroma QP offset and the fractional chroma QP offset and process the video data based on the DRA chroma scale adjustment value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.