1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T H.265 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2015) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Coding of moving video High efficiency video coding Recommendation ITU-T H.
2、265 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H.2
3、59 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia services H.360H
4、.369 Telepresence H.420H.429 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboratio
5、n applications and services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROA
6、DBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 Ubiquitous sensor network applications and Internet of Things H.640H.649 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects
7、H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 Digital Signage H.780H.789 E-HEALTH MULTIMEDIA SERVICES AND
8、 APPLICATIONS Interoperability compliance testing of personal health systems (HRN, PAN, LAN, TAN and WAN) H.820H.859 Multimedia e-health data exchange services H.860H.869 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.265 v3 (04/2015) i Recommendation ITU-T H.26
9、5 High efficiency video coding Summary Recommendation ITU-T H.265 | International Standard ISO/IEC 23008-2 represents an evolution of the existing video coding Recommendations (ITU-T H.261, ITU-T H.262, ITU-T H.263 and ITU-T H.264) and was developed in response to the growing need for higher compres
10、sion of moving pictures for various applications such as Internet streaming, communication, videoconferencing, digital storage media and television broadcasting. It is also designed to enable the use of the coded video representation in a flexible manner for a wide variety of network environments. T
11、he use of this Recommendation | International Standard allows motion video to be manipulated as a form of computer data and to be stored on various storage media, transmitted and received over existing and future networks and distributed on existing and future broadcasting channels. This revision ad
12、ds Annex I with support for 3D high efficiency video coding (3D-HEVC), specifying a syntax and associated decoding process for efficient coding of video textures and depth maps for 3D video applications. One additional profile is defined in this revision, the “3D Main“ profile. This Recommendation |
13、 International Standard was developed jointly with ISO/IEC JTC 1/SC 29/WG 11 (MPEG) and corresponds in a technically aligned manner to ISO/IEC 23008-2. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T H.265 2013-04-13 16 11.1002/1000/11885 2.0 ITU-T H.265 (V2) 2014-10-29 16 1
14、1.1002/1000/12296 3.0 ITU-T H.265 (V3) 2015-04-29 16 11.1002/1000/12455 _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.2
15、65 v3 (04/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is resp
16、onsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the
17、ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborat
18、ive basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain ma
19、ndatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements.
20、 The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU ta
21、kes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property
22、, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2015 All rights reserved. No
23、 part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.265 v3 (04/2015) iii CONTENTS Page 0 Introduction 1 0.1 General 1 0.2 Prologue 1 0.3 Purpose 1 0.4 Applications 1 0.5 Publication and versions of this Specification . 2 0.6
24、 Profiles, tiers and levels 2 0.7 Overview of the design characteristics 2 0.8 How to read this Specification 3 1 Scope 4 2 Normative references 4 2.1 General 4 2.2 Identical Recommendations | International Standards 4 2.3 Paired Recommendations | International Standards equivalent in technical cont
25、ent . 4 2.4 Additional references 4 3 Definitions 4 4 Abbreviations and acronyms 13 5 Conventions 15 5.1 General 15 5.2 Arithmetic operators 15 5.3 Logical operators . 15 5.4 Relational operators. 16 5.5 Bit-wise operators . 16 5.6 Assignment operators 16 5.7 Range notation 16 5.8 Mathematical funct
26、ions . 17 5.9 Order of operation precedence 17 5.10 Variables, syntax elements and tables . 18 5.11 Text description of logical operations . 19 5.12 Processes . 20 6 Bitstream and picture formats, partitionings, scanning processes and neighbouring relationships 20 6.1 Bitstream formats 20 6.2 Source
27、, decoded and output picture formats . 20 6.3 Partitioning of pictures, slices, slice segments, tiles, coding tree units and coding tree blocks 23 6.3.1 Partitioning of pictures into slices, slice segments and tiles 23 6.3.2 Block and quadtree structures . 24 6.3.3 Spatial or component-wise partitio
28、nings . 25 6.4 Availability processes . 25 6.4.1 Derivation process for z-scan order block availability 25 6.4.2 Derivation process for prediction block availability . 26 6.5 Scanning processes 27 6.5.1 Coding tree block raster and tile scanning conversion process . 27 6.5.2 Z-scan order array initi
29、alization process . 28 6.5.3 Up-right diagonal scan order array initialization process 28 6.5.4 Horizontal scan order array initialization process . 29 6.5.5 Vertical scan order array initialization process . 29 7 Syntax and semantics . 30 7.1 Method of specifying syntax in tabular form 30 7.2 Speci
30、fication of syntax functions and descriptors . 31 7.3 Syntax in tabular form . 33 7.3.1 NAL unit syntax 33 7.3.1.1 General NAL unit syntax . 33 7.3.1.2 NAL unit header syntax . 33 iv Rec. ITU-T H.265 v3 (04/2015) Page 7.3.2 Raw byte sequence payloads, trailing bits and byte alignment syntax 34 7.3.2
31、.1 Video parameter set RBSP syntax 34 7.3.2.2 Sequence parameter set RBSP syntax 35 7.3.2.3 Picture parameter set RBSP syntax 37 7.3.2.4 Supplemental enhancement information RBSP syntax 39 7.3.2.5 Access unit delimiter RBSP syntax 39 7.3.2.6 End of sequence RBSP syntax . 39 7.3.2.7 End of bitstream
32、RBSP syntax . 40 7.3.2.8 Filler data RBSP syntax . 40 7.3.2.9 Slice segment layer RBSP syntax 40 7.3.2.10 RBSP slice segment trailing bits syntax . 40 7.3.2.11 RBSP trailing bits syntax . 40 7.3.2.12 Byte alignment syntax 41 7.3.3 Profile, tier and level syntax 41 7.3.4 Scaling list data syntax 43 7
33、.3.5 Supplemental enhancement information message syntax . 43 7.3.6 Slice segment header syntax . 44 7.3.6.1 General slice segment header syntax 44 7.3.6.2 Reference picture list modification syntax . 46 7.3.6.3 Weighted prediction parameters syntax . 47 7.3.7 Short-term reference picture set syntax
34、 . 48 7.3.8 Slice segment data syntax . 49 7.3.8.1 General slice segment data syntax 49 7.3.8.2 Coding tree unit syntax 49 7.3.8.3 Sample adaptive offset syntax 50 7.3.8.4 Coding quadtree syntax 51 7.3.8.5 Coding unit syntax . 51 7.3.8.6 Prediction unit syntax . 54 7.3.8.7 PCM sample syntax 54 7.3.8
35、.8 Transform tree syntax . 55 7.3.8.9 Motion vector difference syntax . 56 7.3.8.10 Transform unit syntax 57 7.3.8.11 Residual coding syntax . 58 7.3.8.12 Cross-component prediction syntax . 60 7.4 Semantics 61 7.4.1 General 61 7.4.2 NAL unit semantics. 61 7.4.2.1 General NAL unit semantics 61 7.4.2
36、.2 NAL unit header semantics 62 7.4.2.3 Encapsulation of an SODB within an RBSP (informative) 65 7.4.2.4 Order of NAL units and association to coded pictures, access units and coded video sequences . 66 7.4.3 Raw byte sequence payloads, trailing bits and byte alignment semantics. 69 7.4.3.1 Video pa
37、rameter set RBSP semantics 69 7.4.3.2 Sequence parameter set RBSP semantics . 72 7.4.3.3 Picture parameter set RBSP semantics . 78 7.4.3.4 Supplemental enhancement information RBSP semantics . 83 7.4.3.5 Access unit delimiter RBSP semantics . 83 7.4.3.6 End of sequence RBSP semantics 83 7.4.3.7 End
38、of bitstream RBSP semantics 83 7.4.3.8 Filler data RBSP semantics 83 7.4.3.9 Slice segment layer RBSP semantics . 83 7.4.3.10 RBSP slice segment trailing bits semantics 83 7.4.3.11 RBSP trailing bits semantics 84 7.4.3.12 Byte alignment semantics . 84 7.4.4 Profile, tier and level semantics 84 7.4.5
39、 Scaling list data semantics 86 7.4.6 Supplemental enhancement information message semantics 88 7.4.7 Slice segment header semantics 89 7.4.7.1 General slice segment header semantics 89 7.4.7.2 Reference picture list modification semantics 94 7.4.7.3 Weighted prediction parameters semantics 94 Rec.
40、ITU-T H.265 v3 (04/2015) v Page 7.4.8 Short-term reference picture set semantics . 95 7.4.9 Slice segment data semantics 98 7.4.9.1 General slice segment data semantics 98 7.4.9.2 Coding tree unit semantics . 98 7.4.9.3 Sample adaptive offset semantics . 98 7.4.9.4 Coding quadtree semantics . 100 7.
41、4.9.5 Coding unit semantics 100 7.4.9.6 Prediction unit semantics . 102 7.4.9.7 PCM sample semantics 102 7.4.9.8 Transform tree semantics . 102 7.4.9.9 Motion vector difference semantics . 103 7.4.9.10 Transform unit semantics . 104 7.4.9.11 Residual coding semantics . 104 7.4.9.12 Cross-component p
42、rediction semantics 107 8 Decoding process . 107 8.1 General decoding process 107 8.1.1 General 107 8.1.2 CVSG decoding process . 107 8.1.3 Decoding process for a coded picture with nuh_layer_id equal to 0 . 108 8.2 NAL unit decoding process . 109 8.3 Slice decoding process 109 8.3.1 Decoding proces
43、s for picture order count . 109 8.3.2 Decoding process for reference picture set . 110 8.3.3 Decoding process for generating unavailable reference pictures 114 8.3.3.1 General decoding process for generating unavailable reference pictures . 114 8.3.3.2 Generation of one unavailable picture 115 8.3.4
44、 Decoding process for reference picture lists construction . 115 8.3.5 Decoding process for collocated picture and no backward prediction flag . 116 8.4 Decoding process for coding units coded in intra prediction mode 116 8.4.1 General decoding process for coding units coded in intra prediction mode
45、 116 8.4.2 Derivation process for luma intra prediction mode . 117 8.4.3 Derivation process for chroma intra prediction mode . 119 8.4.4 Decoding process for intra blocks . 120 8.4.4.1 General decoding process for intra blocks . 120 8.4.4.2 Intra sample prediction . 122 8.5 Decoding process for codi
46、ng units coded in inter prediction mode 128 8.5.1 General decoding process for coding units coded in inter prediction mode 128 8.5.2 Inter prediction process . 128 8.5.3 Decoding process for prediction units in inter prediction mode . 131 8.5.3.1 General . 131 8.5.3.2 Derivation process for motion v
47、ector components and reference indices 132 8.5.3.3 Decoding process for inter prediction samples. 147 8.5.4 Decoding process for the residual signal of coding units coded in inter prediction mode 156 8.5.4.1 General . 156 8.5.4.2 Decoding process for luma residual blocks 156 8.5.4.3 Decoding process
48、 for chroma residual blocks 157 8.6 Scaling, transformation and array construction process prior to deblocking filter process . 159 8.6.1 Derivation process for quantization parameters 159 8.6.2 Scaling and transformation process . 160 8.6.3 Scaling process for transform coefficients 161 8.6.4 Trans
49、formation process for scaled transform coefficients 162 8.6.4.1 General . 162 8.6.4.2 Transformation process 163 8.6.5 Residual modification process for blocks using a transform bypass . 165 8.6.6 Residual modification process for transform blocks using cross-component prediction165 8.6.7 Picture construction process prior to in-loop filter process . 166 8.7 In-loop filter process . 166 8.7.1 General 166 8.7.2 Deblocking filter process 167 vi Rec.
