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Ultra HD Forum Guidelines Ultra HD Forum Guidelines October 19, 2020 Revision: 2.4 Ultra HD Forum 8377 Fremont Blvd., Suite 117 Fremont, CA 94538 UNITED STATES Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 Page ii Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 Foreword This new version 2.4 of the Ultra HD Forum Guidelines offers a holistic view of all the different UHD technologies. These Guidelines use the concepts of a “foundation layer” with readily available mature technologies and an “enhancement layer” with newer technologies. This work represents over five years of collaborative effort. Our new guidelines would not have been possible without the leadership of Jim DeFilippis, who represents Fraunhofer and chairs our Guidelines Work Group. All the companies that have participated in this effort over the years are listed below, but Jim has expressed his gratitude for this new revision specifically to Bill Redmann (InterDigital), Chris Seeger (Comcast/NBCU), Chris Johns (BSkyB), Richard Doherty (Dolby), Dr. George Bokuchava (Tulix), Pete Sellar (Xperi), Andrew Cotton (BBC) and Andrew Dunne (BBC). There are many updates described by Jim on the next page. I hope you will enjoy reading today. If you want to know more about Ultra HD, and how it can be deployed, I invite you to join the Ultra HD Forum. You can start by visiting our website: www.ultrahdforum.org. Thierry Fautier, President, Ultra HD Forum October 2020 Page iii Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 Main changes from version 2.3 to 2.4 What’s new in the Fall 2020 Version of the UHDF Guidelines document (v2.4): 1. Objective Measurement and Analysis of the Quality of Tone Mapping. A new section was added to the Guidelines, based on the work of ITU-R BT.2124, “Objective metric for the assessment of the potential visibility of color differences in television”, that explains why it is important to consider carefully the technology and methods when converting to or from different color spaces. Included is work undertaken by NBCU to evaluate a number of color conversion LUTs (Look Up Tables) to and from SDR imagery using ITU-R Rec 709 color space to HDR imagery using ITU-R Rec 2100. This is most important when deciding how best to mix formats in production as well as to provide a consistent and pleasing SDR video program derived from an HDR Wide Color program. 2. UHD Live Event Distribution over OTT. Another new section of the Guidelines which provides insight into the creation and distribution of live content, produced in UHD with HDR and Wide Color and then distributed via the Internet (OTT). While there are similarities to the existing live workflows for UHD, as documented in the Guidelines, there are unique challenges especially for distribution and the support of UHD formats by the typical end devices including IP set-top boxes, smart TV apps and mobile device apps. Description of a typical live streaming workflow, with recommendations for formats and parameters such as FEC and ‘ladder’ bandwidths, as well as the support of various formats by platforms such as Amazon Fire, Android TV, Roku 4k, Apple TV 4k, and Chromcast are detailed. Support by these platforms for the main HDR formats, PQ10, HLG10, DV (Dolby Vision), SL-HDR1 (Interdigital), and HDR 10+(Samsung) is listed. Audio codec support is also listed. 3. Annexes. The Guidelines has updated several of the Annexes as well as adding a new Annex on the support of UHD by DVB-T2. The Annexes represent new and developing technologies that are on the near horizon but have not yet fully developed or deployed. Of note is the update to ATSC 3.0 detailing the ability to carry OTT services, the update to the proposed UHD standard for Brazil and an update to the ST 2110 Annex including the efforts of AMWA (Advanced Media Workflow Association) to standardized the discovery and orchestration of ST 2110 streams. Jim DeFilippis, Guidelines Working Group Chair, Ultra HD Forum October 2020 Page iv Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 Acknowledgements This document is the result of many iterations of work by the members of the Ultra HD Forum Guidelines Working Group. We would like to thank these members who have worked hard at producing these guidelines and industry best practices. ARRIS ATEME ATT DIRECTV British Broadcasting Corporation BBright Beamr Brightcove Inc. Broadcom B.COM Comcast Comunicare Digitale Content Armor CTOIC Dolby DTG Endeavor Streaming Eurofins Digital Testing Fairmile West Consulting Fraunhofer IIS Harmonic Huawei Technologies InterDigital LG Electronics MediaKind MovieLabs NAB Nagra, Kudelski Group NGCodec Sky Sony Corporation Xperi Technicolor SA Verimatrix Inc. V-Silicon Page v Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 Notice The Ultra HD Forum Guidelines are intended to serve the public interest by providing recommendations and procedures that promote uniformity of product, interchangeability and ultimately the long-term reliability of audio/video service transmission. This document shall not in any way preclude any member or nonmember of the Ultra HD Forum from manufacturing or selling products not conforming to such documents, nor shall the existence of such guidelines preclude their voluntary use by those other than Ultra HD Forum members, whether used domestically or internationally. The Ultra HD Forum assumes no obligations or liability whatsoever to any party who may adopt the guidelines. Such adopting party assumes all risks associated with adoption of these guidelines and accepts full responsibility for any damage and/or claims arising from the adoption of such guidelines. Attention is called to the possibility that implementation of the recommendations and procedures described in these guidelines may require the use of subject matter covered by patent rights. By publication of these guidelines, no position is taken with respect to the existence or validity of any patent rights in connection therewith. Ultra HD Forum shall not be responsible for identifying patents for which a license may be required or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. Patent holders who believe that they hold patents which are essential to the implementation of the recommendations and procedures described in these guidelines have been requested to provide information about those patents and any related licensing terms and conditions. All Rights Reserved © Ultra HD Forum 2020 Page vi Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 Table of Contents FOREWORD ................................................................................................................................................... III MAIN CHANGES FROM VERSION 2.3 TO 2.4 ............................................................................................. IV ACKNOWLEDGEMENTS ............................................................................................................................... V NOTICE .......................................................................................................................................................... VI 1. PURPOSE AND SCOPE ........................................................................................................................... 1 2. REFERENCES .......................................................................................................................................... 3 2.1 Reference List 3 2.2 Brief Summary of ITU-R BT.709, BT.2020, and BT.2100 for Linear Broadcast Production and DistriBution 10 3. TERMS AND ACRONYMS ..................................................................................................................... 11 3.1 Terms 11 3.2 Acronyms and AbBreviations 14 4. PHASES AND TIMEFRAMES ................................................................................................................ 17 4.1 Foundation UHD TecHnologies 17 4.1.1 CTA 608/708, ETSI 300 743, ETSI 300 472, SCTE-27, IMSC1 18 4.2 Additional UHD TecHnologies 20 5. USE CASES ............................................................................................................................................ 22 5.1 Digital Terrestrial Transmission 22 5.2 MVPD Platform Delivery 22 5.3 IP Network Delivery 23 6. PRODUCTION AND POST PRODUCTION ............................................................................................ 25 6.1 HDR/WCG TecHnologies 26 6.1.1 Perceptual QuantiZation (PQ) and PQ10 26 6.1.2 HyBrid Log-Gamma (HLG) and HLG10 27 6.1.3 Recommendation ITU-R BT.2100 28 6.1.4 Static Metadata – SMPTE ST 2086, MaxFALL, MaxCLL 29 6.1.5 HDR10 30 6.1.6 Foundation UHD HDR TecHnologies 30 6.1.7 HDR10 Metadata Generation 30 6.1.8 HDR10 Metadata Carriage 31 6.1.9 Signaling Transfer Function, System Colorimetry and MatrixCoefficients 31 6.1.10 Peak BrigHtness – Consideration of Production, Reference Monitors, Consumer Displays and ArcHive Content 36 6.1.11 Studio Video over IP 38 6.1.12 Adding Dynamic HDR Metadata to Foundation UHD 38 6.2 Production for Pre-recorded Content 39 6.2.1 Camera Requirements 40 6.2.2 Reference Monitor 42 6.2.3 On-Set / Near-Set Monitoring 42 6.2.4 Color Grading 42 6.2.5 Channel-based Immersive Audio Post Production 43 6.2.6 Additional UHD TecHnologies Beyond Foundation UHD – NGA 45 6.3 Production for Live Content 45 6.3.1 Live Production in Trucks or Studio Galleries 46 Page vii Ultra HD Forum Ultra HD Forum Guidelines, V2.4 October 19, 2020 6.3.2
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