1、 ETSI TS 103 433-2 V1.1.1 (2018-01) High-Performance Single Layer High Dynamic Range (HDR) System for use in Consumer Electronics devices; Part 2: Enhancements for Perceptual Quantization (PQ) transfer function based High Dynamic Range (HDR) Systems (SL-HDR2) TECHNICAL SPECIFICATION ETSI ETSI TS 103
2、 433-2 V1.1.1 (2018-01)2 Reference DTS/JTC-040-2 Keywords broadcasting, content, digital, distribution, HDR, HDTV, UHDTV, video ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non
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9、o are trademarks registered and owned by the GSM Association. ETSI ETSI TS 103 433-2 V1.1.1 (2018-01)3 Contents Intellectual Property Rights 5g3Foreword . 5g3Modal verbs terminology 5g3Introduction 5g31 Scope 8g32 References 8g32.1 Normative references . 8g32.2 Informative references 8g33 Definition
10、s, symbols, abbreviations and conventions 9g33.1 Definitions 9g33.2 Symbols 10g33.2.1 Arithmetic operators . 10g33.2.2 Mathematical functions . 11g33.3 Abbreviations . 11g33.4 Conventions 12g34 End-to-end system 12g35 HDR system architecture 13g36 Dynamic metadata format for HDR-to-HDR/SDR adaptatio
11、n 13g37 HDR-to-HDR/SDR signal reconstruction process . 15g37.1 Input streams 15g37.2 Reconstruction process of an SDR or HDR stream 15g37.2.1 Introduction. 15g37.2.2 Selecting a reconstruction mode . 16g37.2.3 Luminance mapping and colour correction tables construction 17g37.2.3.1 Luminance mapping
12、table construction from variables (payloadMode 0) 17g37.2.3.1.1 Introduction . 17g37.2.3.1.2 Overview of the computation of lutMapY . 17g37.2.3.1.3 Block “To perceptual uniform signal“ . 18g37.2.3.1.4 Block “Black/white level adaptation“ 18g37.2.3.1.5 Block “Tone mapping curve“ 19g37.2.3.1.6 Block “
13、Adjustment curve“ . 21g37.2.3.1.7 Block “Gain limiter“ 22g37.2.3.1.8 Block “To linear signal“ 23g37.2.3.1.9 Block “Inverse EOTF“ . 23g37.2.3.2 Colour correction table construction from parameter-based mode (payloadMode 0) . 23g37.2.3.3 Luminance mapping table retrieval (payloadMode 1) 24g37.2.3.4 Co
14、lour correction table retrieval (payloadMode 1) . 25g37.2.4 HDR/SDR picture reconstruction from look-up tables and HDR picture . 25g37.3 Metadata recomputation for presentation display adaptation . 27g37.3.1 Introduction. 27g37.3.2 Scaling factor computation . 27g37.3.3 Recomputation for “Black/whit
15、e level adaptation“ parameters 28g37.3.4 Recomputation for “Tone mapping curve“ parameters . 28g37.3.5 Recomputation for “Adjustment curve“ parameters . 29g3Annex A (normative): SL-HDR reconstruction metadata using HEVC . 31g3Annex B (normative): SL-HDR reconstruction metadata using AVC 32g3Annex C
16、(informative): HDR-to-SDR decomposition principles and considerations 33g3Annex D (informative): Gamut mapping . 34g3ETSI ETSI TS 103 433-2 V1.1.1 (2018-01)4 Annex E (informative): Embedded data on CE digital video interfaces . 35g3E.1 Introduction 35g3E.2 Supported video formats 35g3E.3 Metadata pa
17、ckets 35g3E.3.1 Introduction 35g3E.3.2 Metadata packet syntax 35g3E.3.3 Metadata packet semantics . 36g3E.3.4 Metadata packet embedding . 37g3E.4 Graphics Indicator bit . 37g3E.5 Signalling SL-HDR Dynamic Metadata . 38g3E.5.1 Introduction 38g3E.5.2 VSVDB to signal SL-HDR support . 38g3E.5.3 SL-HDR D
18、ynamic Metadata InfoFrame 38g3Annex F (informative): Error-concealment: recovery in post-processor from metadata loss or corruption . 40g3F.1 Introduction 40g3F.2 Metadata values for recovery mode . 40g3F.3 Recovery of shadow_gain_control with MDCV SEI message 41g3F.4 Recovery of shadow_gain_control
19、 without MDCV SEI message . 41g3Annex G (informative): ETSI TS 103 433 signalling in CTA-861-G 42g3Annex H (informative): Minimum and maximum value of Lpdispfor display adaptation . 43g3Annex I (informative): Change History 44g3History 45g3ETSI ETSI TS 103 433-2 V1.1.1 (2018-01)5 Intellectual Proper
20、ty Rights Essential patents IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property
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24、onstitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document is part 2 of a multi-part deliverable. Full details of the en
25、tire series can be found in part 1 1. NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also
26、 CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the co-ordination of its members activities in the technical, legal, programme-making and programme-exchange domains. The
27、EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 Modal verbs terminology In the present document “shall“, “shall not“, “sh
28、ould“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation.
29、Introduction Motivation Today High Efficiency Video Coding (HEVC) enables first Ultra HD broadcast services (also referred as “4K“ resolution) via existing DVB specifications. ETSI ETSI TS 103 433-2 V1.1.1 (2018-01)6 The goal of ETSI TS 103 433-1 1 V1.2.1, SL-HDR1, was to standardize a single layer
30、HDR system addressing direct backwards compatibility i.e. a system leveraging SDR distribution networks and services already in place and that enables high quality HDR rendering on HDR-enabled CE devices including high quality SDR rendering on SDR CE devices. The goal of the present document is to s
31、pecify enhancements for single layer Perceptual Quantization (PQ) transfer function based HDR systems, enabled by signal processing blocks that are similar/the same to those in SL-HDR1. Similar to SL-HDR1, these enhancements will be enabled by use of dynamic metadata and a post processor in the Cons
32、umer Electronics device. Pre-processing At the distribution stage, an incoming HDR signal is analysed and content-dependent dynamic metadata is produced. This dynamic metadata can be produced in an automatic process or in a manual process where the image quality resulting of the metadata that has be
33、en set manually is judged on an SDR grading monitor. This dynamic metadata can be used to create an optimal picture for a display that has different characteristics, most noticeably a different maximum luminance, than the display used when grading the HDR content. The HDR signal is encoded with any
34、distribution codec (e.g. HEVC as specified in part 1 1, Annex A) and carried throughout an HDR distribution network with accompanying metadata conveyed on a specific channel or embedded in an HDR bitstream. The dynamic metadata can for instance be carried in an SEI message when used in conjunction w
35、ith an HEVC codec. The pre-processor that produces dynamic metadata is not a normative requirement of the present document. Nonetheless, the pre-processor is expected to produce a dynamic metadata stream matching the syntax specified in Annex A and Annex B. Post-processing The post-processing stage
36、occurs just after HDR bitstream decoding. The post-processing takes as input an HDR video frame and associated dynamic metadata and the characteristic of the attached HDR compliant rendering device in order to optimize the HDR picture for the rendering device as specified in clause 7. Structure of t
37、he present document The present document is structured as follows. Clause 1 provides the scope of the current document. Clause 2 provides references used in the present document. Clause 3 gives essential definitions, symbols and abbreviations used in the present document. Clause 4 provides informati
38、on on the end to end system. Clause 5 details the architecture of the HDR system. Clause 6 specifies the format of the content-based dynamic metadata common to systems based on ETSI TS 103 433 multi-part documents. Specifically to the present document, the metadata are produced during the HDR-to-SDR
39、 decomposition stage and they enable reconstruction of the SDR signal from the decoded HDR signal using those metadata. Clause 7 specifies the reconstruction process of the SDR signal and an HDR signal that is adapted to the maximum luminance of the presentation display. The dynamic metadata format
40、specified in clause 6 is normatively mapped from SEI messages representative of SL-HDR system that are specified for HEVC and AVC respectively in Annex A and Annex B. Informative Annex C and Annex D provide information on an HDR-to-SDR decomposition process, and a gamut mapping process. Informative
41、Annex E describes a way to transfer dynamic metadata by embedding it in the video transferred over a CE digital video interface. Informative Annex F proposes a recovery procedure when dynamic metadata are detected as missing by the post-processor during the HDR signal reconstruction. The recovery pr
42、ocedure may also be applied in case it is desirable to replace the original metadata by a fixed tone mapping function, e.g. when graphics overlays are inserted on the decoded video by a mid-device (e.g. STB) which transmits SL-HDR reconstruction metadata as well as the mixed video to an SL-HDR capab
43、le TV. Eventually, informative Annex G gives reference to a standard mechanism to carry SL-HDR reconstruction metadata through interfaces and Annex H provides a recommendation on the maximum presentation display luminance that display adaptation can be used with. The structure of the present documen
44、t is summarized in Table 1. ETSI ETSI TS 103 433-2 V1.1.1 (2018-01)7 Table 1: Structure of the present document Clause/Annex # Descriptionfigure Normative/Informative (in the present document) Clause 1 Scope of the document Informative Clause 2 References used in the document Normative/Informative C
45、lause 3 Definitions, symbols, abbreviations Informative Clause 4 End-to-end system Informative Clause 5 Architecture of the HDR system Informative Clause 6 Metadata format abstraction layer (agnostic to the distribution format) Normative Clause 7 HDR-to-HDR/SDR reconstruction process Normative Annex
46、 A SL-HDR reconstruction metadata using HEVC Normative Annex B SL-HDR reconstruction metadata using AVC Normative Annex C HDR-to-SDR decomposition principles and considerations Informative Annex D Gamut mapping Informative Annex E Embedded data on CE digital video interfaces Informative Annex F Erro
47、r-concealment and recovery procedure Informative Annex G ETSI TS 103 433 signalling in CTA-861-G Informative Annex H Minimum and maximum value of g1838g3043g3031g3036g3046g3043for display adaptation Informative ETSI ETSI TS 103 433-2 V1.1.1 (2018-01)8 1 Scope The present document specifies the HDR-t
48、o-HDR/SDR content-based dynamic metadata and the post-decoding process enabling reconstruction from the specified metadata and an HDR signal of an SDR signal (100 cd/m2or less) or an HDR signal with a maximum luminance ranging from 100 cd/m2to a maximum luminance that is higher than that of the orig
49、inal HDR signal. This reconstruction process is typically invoked in a Consumer Electronics device such as a TV set, a smartphone, a tablet, or a Set Top Box. Besides, it provides information and recommendations on the usage of the described HDR system. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments)
