HDR10+

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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 intents.

HDR10+ is a competitor 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[edit]

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 10,000 nits maximum brightness on a scene-by-scene or frame-by-frame basis and supports up to 10-bit colour depth and 8K resolution.[6][7][8][9] This function is based on Samsung application SMPTE ST 2094-40 Application #4.[10][11][12][7][8][9] HDR10+ is an open standard and is royalty-free; it is supported by Colorfront's Transkoder and MulticoreWare's x265.[7][8][9] A certification and logo program for HDR10+ device manufacturers will be made available with an annual administration fee and no per unit royalty.[13] An authorized test center conducts a certification program for HDR10+ devices.[13]

On 28 August 2017, Samsung, Panasonic, and 20th Century Fox created the HDR10+ Alliance[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 to have most of the advantages of Dolby Vision over HDR10, despite being fee free.[20]

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.[21] 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.[22]

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

Technical details[edit]

HDR10+ content profile[edit]

  • EOTF: SMPTE ST 2084 (PQ)
  • Chroma subsampling: 4:2:0 (for compressed video sources)
  • Resolution: Agnostic (2K/4K/8K,[23] 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[24]
  • Metadata (optional): MaxCLL, MaxFALL[25]

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[26] as well as any codec that supports ITU-T T.35 metadata.

Workflow and ecosystem[edit]

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[27])
  • displaying HDR10+ content on a capable display (e.g. HDMI interfaces with HDR10+ VSIF) and mobile devices [28] 

Metadata generation[edit]

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,[29] which is then parsed and injected into video files.

Live encoding[edit]

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+[30] 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[edit]

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

Administration[edit]

HDR10+ Technologies, LLC[32] 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[edit]

[33]

Authorized test centers[edit]

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

Adoption[edit]

Adopters[34][edit]

HDR10+ certified products[edit]

Certified product[35] 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

External links[edit]

References[edit]

  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. ^ "HDR terminology demystified". FlatpanelsHD. 2019-08-23. Retrieved 2021-10-09.
  4. ^ Denison, Caleb. "HDMI 2.1: What it is, and why your next TV should have it". DigitalTrends. Digital Trends Media Group. Retrieved 29 October 2021.
  5. ^ "Samsung's HDR10+ Adaptive goes head-to-head with Dolby Vision IQ". Trusted Reviews. 2021-01-06. Retrieved 2021-10-09.
  6. ^ "Archived copy" (PDF). Archived (PDF) from the original on 4 September 2019. Retrieved 3 January 2020.CS1 maint: archived copy as title (link)
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  9. ^ a b c John Archer (20 April 2017). "Samsung And Amazon Just Made The TV World Even More Confusing". Forbes. Archived from the original on 20 April 2017. Retrieved 20 April 2017.
  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.
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  14. ^ "HDR10+LLC". hdr10+llc. 24 May 2019. Archived from the original on 18 May 2019. Retrieved 24 May 2019.
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  19. ^ Samsung Electronics (24 May 2019). "Samsung Electronics and Universal Pictures Home Entertainment Announce HDR10+ Content Collaboration". Samsung Newsroom. Archived from the original on 4 April 2019. Retrieved 24 May 2019.
  20. ^ Michael Bizzaco; Ryan Waniata; Simon Cohen (19 December 2020). "HDR TV: What it is and why your next TV should have it". Digital Trends. Designtechnica Corporation. Archived from the original on 21 December 2020. Retrieved 2 January 2021.
  21. ^ 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.
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  24. ^ 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.
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  26. ^ "The WebM Project | VP9 Video Codec Summary". www.webmproject.org. Archived from the original on 2019-10-18. Retrieved 2019-09-05.
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  34. ^ "Adopters - HDR10+". hdr10plus.org. Archived from the original on 2019-09-05. Retrieved 2019-09-05.
  35. ^ "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.