Trim-pass correction for cloud-based coding of HDR video
US12238344B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Sep 17, 2021 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Jan 14, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a cloud-based system for encoding high dynamic range (HDR) video, each node receives a video segment and bumper frames. Each segment is subdivided into primary scenes and secondary scenes to derive scene-based forward reshaping functions that minimize the amount of reshaping-related metadata when coding the video segment. When a parent scene of a secondary scene is processed by two or more neighboring nodes, initial forward reshaping functions and trim-pass correction parameters are adjusted using reference tone-mapping functions and updated scene-based trim-pass correction parameters.
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