HDR10+

HDR10+[1] is a High Dynamic Range (HDR) video technology that adds dynamic metadata[2] to HDR10 source files. HDR10+ signals the dynamic range and scene characteristics on a scene-by-scene or even frame-by-frame basis. The display device then uses the dynamic metadata to apply an appropriate tone map through the process of dynamic tone mapping.[3] Dynamic tone mapping differs from static tone mapping by applying a different tone curve from scene-to-scene rather than use a single tone curve for an entire video.[4] HDR10+ is the default variant of dynamic metadata as part of the HDMI 2.1 standard (in Amendment 1 of it).

Workflow and ecosystem
HDR10+ Distribution Ecosystem

HDR10+ utilizes an HDR10 master file within existing HDR post-production and distribution workflows.

The HDR10+ ecosystem is used within current systems by,

  • storing HDR10+ metadata in JSON files
  • embedding HDR10+ metadata into HDR10 encoded content
  • distribution through digital stream (e.g. streaming with HDR10+ SEI[5])
  • displaying HDR10+ content on a capable display (e.g. HDMI interfaces with HDR10+ VSIF) and mobile devices [6] 

Metadata generation
HDR10+ Metadata Workflow

For offline and Video-On-Demand (VOD) (e.g. Ultra-High Definition Blu-ray, Over-The-Top (OTT), Multi-Channel Video Programming Distributor (MVPD)), HDR10+ Metadata may be created during the post-production, mastering process or during transcoding/encoding for distribution back-ends by HDR10+ content generation tools in two steps,

  1. Identifying scene cuts, and
  2. Performing an image analysis on each scene or frame to derive statistics

HDR10+ metadata is interchanged through a low complexity JSON-structured text file,[7] which is then parsed and injected into video files.

Live encoding
HDR10+ Live Encoder Workflow

Live use cases are possible by delivering HDR10+ metadata in every frame. HEVC encoders generate and inject metadata on live content and mobile phones record video and create HDR10+[8] metadata in real-time during recording. Live encoding is detailed in the Live Encoder Workflow diagram and real time broadcast operations are supported at the point of transmission enabling a metadata-less broadcast operation.

Compatibility
HDR10+ Backward Compatibility

HDR10+ metadata follows ITU-T T.35 and can co-exist with other HDR metadata such as HDR10 static metadata that makes HDR10+ content backward compatible[9] with non-HDR10+ TVs. HDR10+ metadata is ignored by devices that do not support the format and video is played back in HDR10.

HDR10+ content profile
  • EOTF: SMPTE ST 2084 (PQ)
  • Chroma Sub-sampling: 4:2:0 (for compressed video sources)
  • Resolution: Agnostic (2K/4K/8K,[10] etc.)
  • Bit Depth: 10-bit or more (up to 16-bit)
  • Color Primaries: ITU-R BT.2020
  • Maximum linearized pixel value: 10,000 cd/m2 for each color R/G/B (content)
  • Metadata (Required): Mastering Display Color Volume Metadata[11]
  • Metadata (Optional): MaxCLL, MaxFALL[12]

HDR10+ technology can support the full range of HDR standards to 10,000 cd/m2, 8K and BT.2020 color gamut. Being resolution agnostic, metadata needs to be created only once and can be applied to any target resolution.

HDR10+ is applicable for HEVC and VP9 compatibility via WebM[13] as well as any codec that supports ITU-T T.35 metadata.

Administration
HDR10+ Logo

HDR10+ Technologies, LLC[14] administers the license and certification program for products that want to adopt HDR10+. HDR10+ Technologies, LLC provides the technical specifications, test specifications, and certified logo.

Founders

[15]

Authorized Test Centers

Certification of products is done through Authorized Test Centers. The following are a list of HDR10+ Authorized Test Centers,

Adopters[16]

HDR10+ certified products

Certified product[17] categories include:

  • Ultra-High Definition displays
  • Ultra-High Definition Blu-ray disc players
  • Systems-on-chip (SoC)
  • Set-top boxes
  • A/V Receivers
  • Streaming applications
  • Mobile devices

References
  1. "What is HDR10+? What you need to know". Trusted Reviews. 2019-05-21. Archived from the original on 2019-06-09. Retrieved 2019-09-16.
  2. "Understanding Dynamic Metadata". Creative Planet Network. 2016-11-30. Archived from the original on 2020-08-08. Retrieved 2019-09-16.
  3. Werner, Ken (2017-02-16). "Two Keys to Optimal HDR TVs: Dynamic HDR Metadata and Tone Mapping". DisplayDaily. Archived from the original on 2021-01-25. Retrieved 2019-09-16.
  4. "What is 4K HDR Dynamic Metadata?". AVForums. Retrieved 2019-11-19.
  5. "SEI messages | MPEG". mpeg.chiariglione.org. Archived from the original on 2019-09-05. Retrieved 2019-09-05.
  6. Katzmaier, David. "Galaxy S10 screen deep dive: Dynamic AMOLED, HDR10+, explained". CNET. Archived from the original on 2019-02-26. Retrieved 2019-09-16.
  7. "Transkoder 2018: User Guide". www.colorfront.com. Retrieved 2019-11-19.
  8. HDR10+ Video Recording on Your Galaxy S10, archived from the original on 2020-09-01, retrieved 2019-09-16
  9. "Are You Ready for Your HDR Delivery?". Studio Daily. 2018-12-19. Archived from the original on 2019-10-29. Retrieved 2019-11-19.
  10. "Samsung brings its HDR10+ tech to 8K TVs". Engadget. Archived from the original on 2019-09-15. Retrieved 2019-09-16.
  11. Mastering Display Color Volume Metadata Supporting High Luminance and Wide Color Gamut Images. doi:10.5594/SMPTE.ST2086.2018. ISBN 978-1-68303-139-0.
  12. Turner, Paul. "HDR: Standards, Standards, Everywhere". TvTechnology. Archived from the original on 2020-09-27. Retrieved 2019-11-19.
  13. "The WebM Project | VP9 Video Codec Summary". www.webmproject.org. Archived from the original on 2019-10-18. Retrieved 2019-09-05.
  14. "HDR10+". Archived from the original on 2019-08-27. Retrieved 2019-08-27.
  15. "HDR10+ Technologies, LLC, Founded by 20th Century Fox, Panasonic and Samsung, Welcomes First Adopters of HDR10+ Technology". www.businesswire.com. 2018-08-28. Archived from the original on 2019-09-05. Retrieved 2019-09-05.
  16. "Adopters - HDR10+". hdr10plus.org. Archived from the original on 2019-09-05. Retrieved 2019-09-05.
  17. "HDR10+ Certification Begins This Month, Brings the Tech to More TVS". www.digitaltrends.com. 2018-06-21. Archived from the original on 2019-10-19. Retrieved 2019-09-16.
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