GB/T 33475.1-2019Information technology—High efficiency multimedia coding—Part 1: System (English PDF)
信息技术 高效多媒体编码 第1部分:系统
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 30, 2019
Implementation date
March 1, 2020
Scope
GB/T 33475.1-2019 is the English-translated version of 信息技术 高效多媒体编码 第1部分:系统.
GB/T 33475.1-2019 is Part 1 of GB/T 33475 and specifies the system layer of high efficiency multimedia coding.
It covers the conventions used, the architecture, the media presentation description, fragments and content security, and its annexes give the structure of the media presentation description, the encryption of confidential elements and attributes in the media presentation XML, and an XML example of such a description.
It applies to web streaming, network television and video on demand. Among the terms it defines are the adaptation set, a group of interchangeable encoded versions of the same media content, and the authentication tag, a cryptographic checksum used to detect accidental errors and deliberate modification of data.
It cites GB/T 17975.1, GB/T 20090.1 and GB/T 32907-2016. Issued on 30 August 2019, it has applied since 1 March 2020.
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Document preview — GB/T 33475.1-2019
National Standard of the People's Republic of China
- ICS
- 35.040
- Classification
- L 71
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Abbreviations
- 5 Convention
- 6 Architecture
- 7 Media Presentation Description
- 8 fragment
- 9 Content Security
- Appendix A (Normative) Media Presentation Description Structure
- Appendix B (informative) Media presentation XML encryption describing confidential elements and attributes
- Appendix C (informative appendix) XML presentation of the media presentation description
Foreword
GB/T 33475 "Information Technology Efficient Multimedia Coding" consists of three parts.
--- Part 1: System;
--- Part 2: Video;
--- Part 3: Audio.
This part is the first part of GB/T 33475.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This part of GB/T 33475 specifies system layer conventions, architecture, media presentation descriptions, fragments, content security for efficient multimedia coding. And other aspects.
This section applies to applications such as web streaming, web TV, and video on demand.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 17975.1 Information technology - General coding for motion pictures and associated audio information - Part 1
GB/T 20090.1 Advanced Audio and Video Coding for Information Technology Part 1: System
GB/T 32907-2016 Information Security Technology SM4 Block Cipher Algorithm
ISO /IEC 13818-1 Information technology - Generic coding of moving pictures and associated audio information - Part 1 technology-Genericcodingofmovingpicturesandassociatedaudioinformation-Part 1: Systems)
ISO /IEC 23009-1 HTTP-based dynamic adaptive streaming [DynamicadaptivestreamingoverHTTP (DASH)]
IETFRFC1738 Uniform Resource Locator [Uniformresourcelocators(URL)]
IETFRFC2616 HTTP Protocol 1.1 (Hypertexttransferprotocol-HTTP/1.1)
IETFRFC3986 Uniform Resource Identifier. Generic Syntax [Uniformresourceidentifier(URI). Genericsyntax]
IETFRFC4288 Media Type Declaration and Registration Procedure (Mediatypespecificationsandregistrationprocedures)
IETFRFC5261 Extensible Markup Language Patch Operation Framework using XML Path Language [Anextensiblemarkup Language(XML)patchoperationsframeworkutilizingXMLpathlanguage(XPath)Selectors]
IETFRFC5646 Language Identifier (Tagsforidentifyinglanguages)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Adaptation set
A collection of multiple replaceable encoded versions of the same media content.
3.2 Authentication tag
A password checksum of data used to detect unexpected errors and intentional modifications to the data.
4 Abbreviations
5 Convention
6 Architecture
7 Media Presentation Description
8 fragment
9 Content Security
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 61 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 17975.1-2010 — Information technology -- Generic coding of moving pictures and associated audio information -- Part 1: Systems
GB/T 20090.1-2012 — Information technology - Advanced coding of audio and video - Part 1: System
GB/T 20090.10-2013 — Information technology—Advanced coding of audio and video—Part 10: Mobile speech and audio
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