Previous Editions

• Ultra HD Forum Guidelines 3.1

  September 13, 2023

  The new 2023 IBC version of the Ultra HD Forum’s Guidelines (v3.1.0) is a series of short ‘Rainbow Books,’ each focused on one aspect of Ultra HD: definitions, technology, production, distribution, and real-world experiences.
  
  While the core text has not changed significantly from the previous version (3.0), we added further clarity to the HDR and immersive audio sections. Terms such as immersive, ATMOS, E-AC-3 w/JoC, AC-4, MPEG-H, and DTS UHD have been clarified.

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• Ultra HD Forum Guidelines 3.0

  April 5, 2023

  The first edition that was separated into seven color books.

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• Ultra HD Forum Guidelines 2.5

  November 18, 2021

  New: comparison of SDR and HDR ranges of human response to light levels and the ability to capture and display HDR imagery,
  Update: device support for 4k and HDR, including HDMI v2.1 capabilities,
  Update: AVS3, Chinese UHD Standard
  Description: NBC Universal best practice of single stream SDR/HDR live UHD,
  Info on OTT packagers,
  Update: NGA trials,
  Update: status of the ATSC 3.0 rollouts
  Expansion: IP-based workflow (ST 2022, Zixi, SRT, and NDI.

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• Ultra HD Forum Guidelines 2.4

  September 21, 2020

  Information on ITU-R BT.2124 for “Objective metric for the assessment of the potential visibility of color differences in television”, insight into the creation and distribution of live content, produced in UHD with HDR and Wide Color and then distributed via the Internet (OTT) and a major update of annexes including a new one on DVB-T2

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• Ultra HD Forum Guidelines 2.3

  April 13, 2020

  More on color accuracy as well as all new information like for
  ST2110, ATSC 3.0 or the South America Road Map to UHD.

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• Ultra HD Forum Guidelines 2.2

  January 7, 2020

  CES 2020 Version
  Improved definitions of PQ10, HDR10 and HLG 10,
  Overlay spec for Closed Captioning and Subtitle rendering,
  Refine terminology for color space conversions,
  Revised signaling for HDR/WCG used by AVC encoding.

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• Ultra HD Forum Guidelines 2.0

  April 10, 2019

  V2.0 - Unification of phases A and B

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• Ultra HD Forum Guidelines 1.5

  November 20, 2017

  The Ultra HD Forum produces Guidelines to help the industry navigate the complex UHD landscape.
  
  The Ultra HD Forum focuses on end-to-end workflows from camera to consumer.
  
  UHD Phase A Guidelines describe end-to-end processes for creating a linear UHD service using technologies that were commercially available by 2016.
  
  The fourth version of the UHD Phase A Guidelines was released in September 2017.
  
  UHD Phase B Guidelines introduce and de-mystify next generation UHD technologies that operators are exploring for future enhanced UHD services.

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• Ultra HD Forum Guidelines 1.4

  September 1, 2017

  Clarified definitions of PQ10 and HDR10 (Sections 3, 6.1.1 and 6.1.5).
  
  Added a table showing a matrix of 14 different receiver/decoder capability combinations, and a table of 12 different service formats which indicates which of the receiver/decoders can render which service formats (Tables 4 and 5).
  
  Added text about using statistical methods of deriving CLL values, thanks to input from UHDA (Section 6.1.4).
  
  Added “graphics white” level for HLG as recommended by BBC and NHK (Section 6.1.10).
  
  Added a cautionary statement about including PQ-related metadata in an HLG stream, thanks to information learned in UHDF InterOps (Section 8.3).
  
  Added a table of “real world” bitrates as reported by UHDF service provider members (Section 9.3.2).
  
  Added an annex on HDR dynamic metadata (Annex G).
  
  Various minor updates, e.g., updated references, etc.

• Ultra HD Forum Guidelines 1.3

  April 1, 2017

  Inclusion of Forensic Watermarking guidelines.
  
  The Ultra HD Forum is continuing to refine and update this document as new information regarding Phase A UHD services emerges. For example, recent industry discussions about the definitions of PQ10 and HDR10 are actively being considered in the Guidelines Work Group.

• Ultra HD Forum Guidelines 1.2

  December 1, 2016

  Implementation of channel-based immersive audio for Phase A (e.g., Dolby Atmos).
  
  ETSI TS 103 433 method for down-converting HDR/WCG to SDR/BT.709.
  
  Carriage of signalling for transfer function, color container and color matrix, including newly added information for file-based video formats.
  
  A brief summary/comparison of ITU-R BT.709, BT.2020 and BT.2100.
  
  ACES Workflow for color and dynamic range.
  
  Dynamic HDR metadata technologies as candidates for the forum’s future work in Phase B.