Engineering:HDR10+

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Short description: Video technology that adds dynamic metadata to HDR10 source files
HDR10+ Logo

HDR10+[1] is a high dynamic range (HDR) video technology that adds dynamic metadata[2] to HDR10 source files. The dynamic metadata are used to adjust and optimize each frame of the HDR video to the consumer display's capabilities in a way based on the content creator's intentions.Template:Promotion-inline

HDR10+ is an alternative to Dolby Vision, which also uses dynamic metadata.[3] HDR10+ is the default variant of dynamic metadata as part of the HDMI 2.1 standard.[4]

HDR10+ Adaptive is an update designed to optimize HDR10+ content according to the ambient light.[5]

Description

HDR10+, also known as HDR10 Plus, was announced on 20 April 2017, by Samsung and Amazon Video. HDR10+ updates HDR10 by adding dynamic metadata that can be used to more accurately adjust brightness levels up to the full range of PQ code values (10,000 nits maximum brightness) on a scene-by-scene or frame-by-frame basis.[6][7][8][9] The technology is standardized and defined in SMPTE ST 2094-40.[10][11][12][7][8][9] HDR10+ is an open standard [disputed (for: "open" describing something not publicly available)  – discuss] and is royalty-free; it is supported by a growing list of post-production software and tools.[7][8][9] HDR10+ specifications are not publicly available. A certification and logo program for HDR10+ device manufacturers is available with an annual administration fee for certain adopter categories and no per-unit royalty.[13] Authorized test centers conduct certification testing for HDR10+ devices.[13]

On 28 August 2017, Samsung, Panasonic, and 20th Century Fox created the HDR10+ Technologies LLC[14] to promote the HDR10+ standard.[15] HDR10+ video started being offered by Amazon Video on 13 December 2017.[16] On 5 January 2018, Warner Bros. announced their support for the HDR10+ standard.[17] On 6 January 2018, Panasonic announced Ultra HD Blu-ray players with support for HDR10+.[18] On 4 April 2019, Universal Pictures Home Entertainment announced a technology collaboration with Samsung Electronics to release new titles mastered with HDR10+.[19] It is considered[by whom?] to have most of the advantages of Dolby Vision over HDR10, as well as being royalty free.[citation needed]

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.[20] 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.[21]

HDR10+ and Dolby Vision do not use the same dynamic metadata.

Technical details

HDR10+ content profile

  • EOTF: SMPTE ST 2084 (PQ)
  • Chroma subsampling: 4:2:0 (for compressed video sources)
  • Resolution: Agnostic (2K/4K/8K,[22] etc.)
  • Bit depth: 10-bit or more (up to 16-bit) per color channel
  • 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[23]
  • Metadata (optional): MaxCLL, MaxFALL[24]

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 supported in video encoding technologies HEVC, AV1, VP9 compatibility via WebM[25] as well as any codec that supports ITU-T T.35 metadata.

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[26])
  • displaying HDR10+ content on a capable display (e.g. HDMI interfaces with HDR10+ VSIF) and mobile devices [27] 

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,[28] 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+[29] 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[30] with non-HDR10+ TVs. HDR10+ metadata is ignored by devices that do not support the format and video is played back in HDR10.

Administration

HDR10+ Technologies, LLC[31] 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

Source:[32]

Authorized test centers

Certification of products is done through authorized test centers. The following are a list of HDR10+ authorized test centers:

Adoption

Adopters

Source:[33]



HDR10+ certified products

Certified product[34] 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
  • Inflight Entertainment Systems

References

  1. ↑ "What is HDR10+? What you need to know" (in en-US). 2019-05-21. https://www.trustedreviews.com/news/what-is-hdr10-3294683. 
  2. ↑ "Understanding Dynamic Metadata" (in en-US). 2016-11-30. https://www.creativeplanetnetwork.com/news/news-features/understanding-dynamic-metadata-616616. 
  3. ↑ "HDR terminology demystified". 2019-08-23. https://www.flatpanelshd.com/focus.php?subaction=showfull&id=1566562819. 
  4. ↑ Denison, Caleb. "HDMI 2.1: What it is, and why your next TV should have it". Digital Trends Media Group. https://www.digitaltrends.com/home-theater/hdmi-explained-everything-you-need-to-know-news-specs/. 
  5. ↑ "Samsung's HDR10+ Adaptive goes head-to-head with Dolby Vision IQ" (in en). 2021-01-06. https://www.trustedreviews.com/news/samsungs-hdr10-adaptive-goes-head-to-head-with-dolby-vision-iq-4117025. 
  6. ↑ "Archived copy". https://hdr10plus.org/wp-content/uploads/2019/08/HDR10_WhitePaper.pdf. 
  7. ↑ 7.0 7.1 7.2 "Samsung and Amazon Video Deliver Next Generation HDR Video Experience with Updated Open Standard HDR10+". Samsung. 20 April 2017. https://news.samsung.com/global/samsung-and-amazon-video-deliver-next-generation-hdr-video-experience-with-updated-open-standard-hdr10. 
  8. ↑ 8.0 8.1 8.2 Cho Mu-Hyun (20 April 2017). "Samsung, Amazon partner for HDR10 Plus". ZDNet. http://www.zdnet.com/article/samsung-amazon-partner-for-hdr10-plus/. 
  9. ↑ 9.0 9.1 9.2 John Archer (20 April 2017). "Samsung And Amazon Just Made The TV World Even More Confusing". Forbes. https://www.forbes.com/sites/johnarcher/2017/04/20/samsung-and-amazon-just-made-the-tv-world-even-more-confusing/. 
  10. ↑ Dynamic Metadata for Color Volume Transform — Application #4. September 2016. pp. 1–26. doi:10.5594/SMPTE.ST2094-40.2016. ISBN 978-1-68303-048-5. 
  11. ↑ "SMPTE ST 2094 and Dynamic Metadata". Society of Motion Picture and Television Engineers. https://www.smpte.org/sites/default/files/2017-01-12-ST-2094-Borg-V2-Handout.pdf. 
  12. ↑ John Laposky (20 April 2017). "Samsung, Amazon Video Team To Deliver Updated Open Standard HDR10+". Twice. http://www.twice.com/news/tv/samsung-amazon-video-team-deliver-updated-open-standard-hdr10/64840. 
  13. ↑ 13.0 13.1 "20th Century Fox, Panasonic and Samsung Gain Momentum for Best Possible TV-Viewing Experience with HDR10+ Technology". hdr10plus.org. 4 January 2018. http://www.hdr10plus.org/press-release/. 
  14. ↑ "HDR10+LLC". hdr10+llc. 24 May 2019. https://www.hdr10plus.org. 
  15. ↑ Ramus Larsen (28 August 2017). "Samsung, Panasonic & 20th Century Fox form HDR10+ alliance". flatpanelshd. https://www.flatpanelshd.com/news.php?subaction=showfull&id=1503914052. 
  16. ↑ John Archer (13 December 2017). "Amazon Video Has Made All Of Its HDR Shows Available In HDR10+". Forbes. https://www.forbes.com/sites/johnarcher/2017/12/13/amazon-video-just-boosted-the-picture-quality-of-its-entire-hdr-catalog. 
  17. ↑ John Archer (5 January 2018). "Warner Bros Boards The HDR10+ Bandwagon". Forbes. https://www.forbes.com/sites/johnarcher/2018/01/05/warner-bros-boards-the-hdr10-bandwagon. 
  18. ↑ John Archer (6 January 2018). "Panasonic Unveils New 4K Blu-ray Players - Including World First Dolby Vision And HDR10+ Support". Forbes. https://www.forbes.com/sites/johnarcher/2018/01/06/panasonic-unveils-new-4k-blu-ray-players-including-world-first-dolby-vision-and-hdr10-support. 
  19. ↑ Samsung Electronics (24 May 2019). "Samsung Electronics and Universal Pictures Home Entertainment Announce HDR10+ Content Collaboration". Samsung Newsroom. https://news.samsung.com/global/samsung-electronics-and-universal-pictures-home-entertainment-announce-hdr10-plus-content-collaboration. 
  20. ↑ Werner, Ken (2017-02-16). "Two Keys to Optimal HDR TVs: Dynamic HDR Metadata and Tone Mapping" (in en-gb). https://www.displaydaily.com/article/display-daily/two-keys-to-optimal-hdr-tvs-dynamic-hdr-metadata-and-tone-mapping. 
  21. ↑ "What is 4K HDR Dynamic Metadata?" (in en-US). https://www.avforums.com/article/what-is-4k-hdr-dynamic-metadata.13402. 
  22. ↑ "Samsung brings its HDR10+ tech to 8K TVs" (in en). https://www.engadget.com/2019/09/04/samsung-hdr10-plus-8k-streaming/. 
  23. ↑ 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. 
  24. ↑ Turner, Paul (30 May 2018). "HDR: Standards, Standards, Everywhere" (in en-us). https://www.tvtechnology.com/opinions/standards-standards-everywhere. 
  25. ↑ "The WebM Project | VP9 Video Codec Summary". https://www.webmproject.org/vp9/#hdr10-metadata-handling. 
  26. ↑ "SEI messages | MPEG". https://mpeg.chiariglione.org/tags/sei-messages. 
  27. ↑ Katzmaier, David. "Galaxy S10 screen deep dive: Dynamic AMOLED, HDR10+, explained" (in en). https://www.cnet.com/news/galaxy-s10-screen-deep-dive-dynamic-amoled-hdr10-and-more-explained-explainer/. 
  28. ↑ "Transkoder 2018: User Guide". http://www.colorfront.com/doc/TKD/TKD2018UserGuide.html#hdr10plus-workflows. 
  29. ↑ (in en) HDR10+ Video Recording on Your Galaxy S10, https://www.youtube.com/watch?v=aws42wl7cck, retrieved 2019-09-16 
  30. ↑ "Are You Ready for Your HDR Delivery?" (in en). 2018-12-19. https://www.studiodaily.com/2018/12/ready-hdr-delivery/. 
  31. ↑ "HDR10+". https://hdr10plus.org/. 
  32. ↑ "HDR10+ Technologies, LLC, Founded by 20th Century Fox, Panasonic and Samsung, Welcomes First Adopters of HDR10+ Technology" (in en). 2018-08-28. https://www.businesswire.com/news/home/20180828005059/en/HDR10-Technologies-LLC-Founded-20th-Century-Fox. 
  33. ↑ "Adopters - HDR10+". https://hdr10plus.org/adopters/. 
  34. ↑ "HDR10+ Certification Begins This Month, Brings the Tech to More TVS". 2018-06-21. https://www.digitaltrends.com/home-theater/hdr10-plus-certification-kicks-off/. 

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