Method and apparatus for encoding/decoding a high dynamic range picture into a coded bitstream
US11006152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2017 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Jul 11, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for decoding at least one high dynamic range picture from a coded bitstream and a method and corresponding apparatus for coding the bitstream are disclosed. A standard dynamic range picture is decoded from the coded bitstream, a set of pivot points is decoded from the coded bitstream. The set of pivot points is representative of an adjustment function fadj. A predefined color correction function bp_default is selected. An adjusted color correction function badj is determined by 1/badj [γ]=fadj [γ]×(1/bp_default[γ]), where γ is a luminance value. The high dynamic range picture is reconstructed from the decoded standard dynamic range picture and the adjusted color correction function badj.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.