The Ultra HD Forum produces Guidelines to help the industry navigate the complex UHD landscape and focuses on end-to-end workflows from camera to consumer. Guidelines are available here for download at no cost, you don't even need to leave us your email.
New in V2.4 is 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.Download
End-to-end workflows for UHD services
Resolutions of 1080p (with HDR) & 2160p
HDR / WCG (PQ10, HLG10 & HDR10)
Channel-based immersive audio
Dual layer HDR technologies
Dynamic HDR Metadata systems (Dolby® Vision, SL-HDR1 & SL-HDR2)
High Frame Rate (100/120 FPS)
Next Generation Audio (Dolby® AC-4 Audio & MPEG-H Audio)
Content Aware Encoding
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.
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.
April 10, 2019
V2.0 - Unification of phases A and BDownload
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.
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.
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.
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.
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