Video decoding method and apparatus by chroma-multi-transform, and video encoding method and apparatus by chroma-multi-transform
US11265578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2017 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Dec 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/96
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a method and apparatus for performing transformation and inverse transformation on a chroma block by using a variable transform kernel, during video encoding and decoding processes. A video decoding method includes: obtaining, from a bitstream, chroma multi-transform kernel information indicating whether a chroma transform kernel for inverse transformation of a chroma block is determined to be among a plurality of chroma transform kernels; while determining whether the chroma transform kernel is determined to be among the plurality of chroma transform kernels according to the chroma multi-transform kernel information, determining whether to determine the chroma transform kernel by using a luma transform kernel; and performing inverse transformation on the chroma block by using the chroma transform kernel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.