RecommendationITU-TH.265资源-CSDN文库

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根据提供的文件内容，可以提炼出一系列相关的IT知识点，尤其集中在视频编码和多媒体服务方面。文件中提到的ITU-T H.265标准是当前视频编码领域非常重要的技术标准之一，它代表了高效视频编码（High Efficiency Video Coding，HEVC）技术的发展水平。以下详细说明文件中提及的知识点。 1. 国际电信联盟（ITU-T）: ITU-T是国际电信联盟的电信标准部门，负责开发全球电信标准。文件中提到的ITU-T H.265是该机构发布的一种视频编码标准。 2. ITU-T H.265 (04/2013) 第一版建议书: 文件指出这是2013年4月发布的第一个版本的H.265标准。建议书是标准化过程中的一种文档，用于概述技术标准或实践。 3. HEVC（H.265）: 高效视频编码（HEVC）是ITU-T和国际标准化组织（ISO）共同开发的视频编码标准，旨在提供比之前的标准，如H.264/AVC，更高效的视频压缩性能。 4. 视频编码: 视频编码是指将数字视频信号转换成一种压缩格式，以减小文件大小、降低传输需求的技术。在传输或存储前，视频信号需要经过压缩，这样才能在现代通信网络中有效地传输。 5. 视频电话系统特性: 文件中提到的“视觉电话系统特性”涉及在视频通信系统中确保视频通话质量的各种参数和标准。 6. 多媒体系统和应用基础设施: 包括传输、复用、同步、系统方面、通信程序、移动多媒体系统和移动多媒体协作应用程序等。这些是构建多媒体服务基础设施的各个方面，其中涵盖了多媒体通信系统如何工作的技术细节。 7. 安全性: 文件提到针对移动多媒体系统和服务的安全性，包括移动多媒体协作应用程序的安全性。随着多媒体服务越来越普及，安全性变得尤为重要，包括数据保护、用户隐私和网络防护。 8. IPTV服务: 文件提及了IPTV（互联网协议电视）服务和应用，包括IPTV终端设备、中间件、应用事件处理、元数据、多媒体应用框架、服务发现以及到消费过程的服务。IPTV是一种通过IP网络提供电视服务的技术，用户可以按需选择观看内容。 9. 宽带和三重播放服务: 文档中提到了宽带服务以及三重播放（Triple Play），也就是整合了语音、视频和数据服务的宽带服务。 10. 先进的多媒体服务和应用: 文件还提到高级多媒体服务和应用，包括泛在传感网络（Ubiquitous Sensor Networks，USN）和物联网（Internet of Things，IoT）。这些是当前信息技术和网络技术发展的前沿领域。 11. 数字告示（Digital Signage）: 数字告示作为一种信息传播方式，利用数字技术在公共场合显示信息内容。文件提及了数字告示作为多媒体服务的一部分。上述知识点涵盖了视频编码标准、多媒体服务基础设施、IPTV技术、数字告示以及宽带和三重播放服务等多个方面。这些技术都是现代信息技术领域的重要组成部分，影响着人们的生活方式和工作模式。了解和掌握这些知识点，有助于深入理解当前和未来通信技术的发展趋势。

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International Telecommunication Union

ITU-T

H.265

TELECOMMUNICATION

STANDARDIZATION SECTOR

OF ITU

(04/2013)

SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS

Infrastructure of audiovisual services – Coding of moving

video

High efficiency video coding

Recommendation ITU-T H.265

ii Rec. ITU-T H.265 (04/2013)

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 responsible 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 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-T's purview, the necessary standards are

prepared on a collaborative 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

mandatory 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. The

use of such words does not suggest that compliance with the Recommendation is required of any party.

INTELLECTUAL PROPERTY RIGHTS

ITU draws attention to the possibility that the practice or implementation of this Recommendation may

involve the use of a claimed Intellectual Property Right. ITU takes 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,

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 2013

prior written permission of ITU.

Rec. ITU-T H.265 (04/2013) iii

CONTENTS

Page

Introduction................................................................................................................................................................. 1

0.1 Prologue .............................................................................................................................................................. 1

0.2 Purpose ............................................................................................................................................................... 1

0.3 Applications ........................................................................................................................................................ 1

0.4 Publication and versions of this Specification .................................................................................................... 1

0.5 Profiles, tiers and levels ...................................................................................................................................... 2

0.6 Overview of the design characteristics ............................................................................................................... 2

0.7 How to read this Specification ............................................................................................................................ 2

1 Scope .......................................................................................................................................................................... 3

2 Normative references .................................................................................................................................................. 3

2.1 General ................................................................................................................................................................ 3

2.2 Identical Recommendations | International Standards ........................................................................................ 3

2.3 Paired Recommendations | International Standards equivalent in technical content .......................................... 3

2.4 Additional references .......................................................................................................................................... 3

3 Definitions .................................................................................................................................................................. 3

4 Abbreviations ............................................................................................................................................................ 12

5 Conventions .............................................................................................................................................................. 13

5.1 General .............................................................................................................................................................. 13

5.2 Arithmetic operators ......................................................................................................................................... 13

5.3 Logical operators .............................................................................................................................................. 13

5.4 Relational operators .......................................................................................................................................... 14

5.5 Bit-wise operators ............................................................................................................................................. 14

5.6 Assignment operators ........................................................................................................................................ 14

5.7 Range notation .................................................................................................................................................. 14

5.8 Mathematical functions ..................................................................................................................................... 15

5.9 Order of operation precedence .......................................................................................................................... 15

5.10 Variables, syntax elements, and tables .............................................................................................................. 16

5.11 Text description of logical operations ............................................................................................................... 17

5.12 Processes ........................................................................................................................................................... 18

6 Bitstream and picture formats, partitionings, scanning processes, and neighbouring relationships ......................... 18

6.1 Bitstream formats .............................................................................................................................................. 18

6.2 Source, decoded, and output picture formats .................................................................................................... 18

6.3 Partitioning of pictures, slices, slice segments, tiles, coding tree units, and coding tree blocks ....................... 21

6.3.1 Partitioning of pictures into slices, slice segments, and tiles .................................................................... 21

6.3.2 Block and quadtree structures ................................................................................................................... 22

6.3.3 Spatial or component-wise partionings ..................................................................................................... 23

6.4 Availability processes ....................................................................................................................................... 23

6.4.1 Derivation process for z-scan order block availability .............................................................................. 23

6.4.2 Derivation process for prediction block availability ................................................................................. 24

6.5 Scanning processes ........................................................................................................................................... 25

6.5.1 Coding tree block raster and tile scanning conversion process ................................................................. 25

6.5.2 Z-scan order array initialization process ................................................................................................... 26

6.5.3 Up-right diagonal scan order array initialization process .......................................................................... 26

6.5.4 Horizontal scan order array initialization process ..................................................................................... 27

6.5.5 Vertical scan order array initialization process ......................................................................................... 27

7 Syntax and semantics ................................................................................................................................................ 28

7.1 Method of specifying syntax in tabular form .................................................................................................... 28

7.2 Specification of syntax functions and descriptors ............................................................................................. 29

7.3 Syntax in tabular form ...................................................................................................................................... 30

7.3.1 NAL unit syntax ........................................................................................................................................ 30

7.3.1.1 General NAL unit syntax .................................................................................................................... 30

7.3.1.2 NAL unit header syntax ...................................................................................................................... 30