QP derivation and offset for adaptive color transform in video coding
US10057578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2015 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | May 26, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for decoding video data is configured to determine, based on a chroma sampling format for the video data, that adaptive color transform is enabled for one or more blocks of the video data; determine a quantization parameter for the one or more blocks based on determining that the adaptive color transform is enabled; and dequantize transform coefficients based on the determined quantization parameter. A device for decoding video data is configured to determine for one or more blocks of the video data that adaptive color transform is enabled; receive in a picture parameter set, one or more offset values in response to adaptive color transform being enabled; determine a quantization parameter for a first color component of a first color space based on a first of the one or more offset values; and dequantize transform coefficients based on the quantization parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.