Video coding and delivery with both spatial and dynamic range scalability
US10575005B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2016 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Feb 12, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method to code and transmit scalable HDR video signals, HDR signals are processed and encoded in the IPT-PQ color space to generate a base layer at reduced spatial resolution and/or dynamic range, and an enhancement layer with a residual signal. A signal reshaping block before the base layer encoder allows for improved coding of HDR signals using a reduced bit depth. A decoder can use a BL decoder and backward reshaping to generate a decoded BL HDR signal at a reduced dynamic range and/or spatial resolution, or it can combine the decoded BL HDR signal and the EL stream to generate a decoded HDR signal at full dynamic range and full resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.