HDR10+

Video technology that adds dynamic metadata to HDR10 source files From Wikipedia, the free encyclopedia

HDR10+ is a high dynamic range (HDR) video technology introduced by Samsung Electronics Co., Ltd, 20th Century Fox Home Entertainment and Panasonic Corporation as an open, royalty-free dynamic metadata platform for High Dynamic Range (HDR) video. Designed to enhance image quality by applying scene-by-scene tone mapping, HDR10+ aims to deliver improved brightness, contrast, and color accuracy across compatible displays.

StatusIn force
Year startedApril 20, 2017; 9 years ago (2017-04-20)
OrganizationHDR10+ Technologies LLC
Base standardsHDR10+ Advanced
HDR10+ Adaptive
HDR10+ Gaming
Quick facts Status, Year started ...
HDR10+
StatusIn force
Year startedApril 20, 2017; 9 years ago (2017-04-20)
OrganizationHDR10+ Technologies LLC
Base standardsHDR10+ Advanced
HDR10+ Adaptive
HDR10+ Gaming
Related standardsHDR10
DomainHigh Dynamic Range (HDR) Video Technology
Websitehdr10plus.org
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The platform addresses limitations of static HDR formats by enabling dynamic adjustment of visual parameters, thereby more faithfully reproducing filmmakers’ creative intent. Licensing of HDR10+ was scheduled to commence in January 2018, with a nominal administrative fee and broad availability to content producers, hardware manufacturers, and system-on-chip vendors. The partnership emphasized flexibility and scalability, positioning HDR10+ as a future-ready standard for next-generation home entertainment systems.

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.[1][2][3][4] The technology is standardized and defined in SMPTE ST 2094-40.[5][6][7][2][3][4] 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.[2][3][4] 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.[8] Authorized test centers conduct certification testing for HDR10+ devices.[8]

On 28 August 2017, Samsung, Panasonic, and 20th Century Fox created the HDR10+ Technologies LLC[9] to promote the HDR10+ standard.[10] HDR10+ video started being offered by Amazon Video on 13 December 2017.[11] On 5 January 2018, Warner Bros. announced their support for the HDR10+ standard.[12] On 6 January 2018, Panasonic announced Ultra HD Blu-ray players with support for HDR10+.[13] On 4 April 2019, Universal Pictures Home Entertainment announced a technology collaboration with Samsung Electronics to release new titles mastered with HDR10+.[14]

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.[15] 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.[16]

Technical details

HDR10+ content profile

  • EOTF: SMPTE ST 2084 (PQ)
  • Chroma subsampling: 4:2:0 (for compressed video sources), 4:2:2 and 4:4:4
  • Resolution: Agnostic (2K/4K/8K,[17] 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[18]
  • Metadata (optional): MaxCLL, MaxFALL[19]

HDR10+ supports the full range PQ up to 10,000 cd/m2. Being resolution agnostic, metadata needs to be created only once and can be applied to any target resolution.

HDR10+ content can be encoded using video encoding technologies including HEVC (implemented with VSEI) and AV1, VP9 compatibility is achieved via the WebM container.[20]

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[21])
  • displaying HDR10+ content on a capable display (e.g. HDMI interfaces with HDR10+ VSIF) and mobile devices [22]

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,[23] 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+[24] 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 can co-exist with HDR10 static metadata that makes HDR10+ content backward compatible[25] 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[26] 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:[27]

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:[28]

HDR10+ certified products

Certified product[29] categories include:

  • Ultra-High Definition displays
  • Ultra HD Blu-ray disc players
  • Systems-on-chip (SoC)
  • Set-top boxes
  • A/V receivers
  • Streaming applications
  • Mobile devices
  • In-flight entertainment systems

References

External links

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