Method and device for encoding both a HDR picture and a SDR picture obtained from said HDR picture using color mapping functions
US11006151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2016 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Jun 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device of encoding both a HDR picture (IHDR) and a first SDR picture (ISDR1) obtained from said HDR picture, in at least one bitstream (F1, F2, F3, F4). The method comprises: —obtaining (210) a second SDR picture (ISDR2) by tone-mapping the HDR picture (IHDR); —obtaining (230) a color mapping function (CMF) that allows the mapping of the colors of the second SDR picture (ISDR2) onto the colors of a third SDR picture (ISDR3) obtained (220) from the first SDR picture (ISDR1); —encoding (240), in a bitstream, an information (INF) representative of the color mapping function; and —encoding (260), in a bitstream, a fourth SDR picture (ISDR4) obtained (250) from the first SDR picture (ISDR1). The present disclosure further relates to a method and device of decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.