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ISO/IEC 23009-1:2014(E)
©
ISO/IEC 2014
INTERNATIONAL
STANDARD
ISO/IEC
23009-1
Second edition
2014-05-15
Information technology — Dynamic
adaptive streaming over HTTP (DASH) —
Part 1:
Media presentation description and
segment formats
Technologies de l'information — Diffusion en flux adaptatif dynamique
sur HTTP (DASH) —
Partie 1: Description de la présentation et formats de remise des
médias
ISO/IEC 23009-1:2014(E)
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© ISO/IEC 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any
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© ISO/IEC 2014 – All rights reserved
ISO/IEC 23009-1:2014(E)
© ISO/IEC 2014 – All rights reserved iii
Contents Page
Foreword ............................................................................................................................................................. v
Introduction ........................................................................................................................................................ vi
1 Scope ...................................................................................................................................................... 1
2 Normative references ............................................................................................................................ 1
3 Terms, definitions, symbols and abbreviated terms ......................................................................... 2
3.1 Terms and definitions ........................................................................................................................... 2
3.2 Symbols and abbreviated terms .......................................................................................................... 5
3.3 Conventions ........................................................................................................................................... 6
4 Introduction ............................................................................................................................................ 7
4.1 System description ............................................................................................................................... 7
4.2 DASH client model ................................................................................................................................ 8
4.3 DASH data model overview .................................................................................................................. 9
4.4 Protocols .............................................................................................................................................. 11
4.5 Media Stream and Representation properties .................................................................................. 12
4.6 Brands .................................................................................................................................................. 14
4.7 Schemes ............................................................................................................................................... 15
5 Media Presentation .............................................................................................................................. 16
5.1 General ................................................................................................................................................. 16
5.2 Media Presentation Description ......................................................................................................... 16
5.3 Hierarchical data model ...................................................................................................................... 18
5.4 Media Presentation Description updates .......................................................................................... 61
5.5 MPD assembly ..................................................................................................................................... 62
5.6 Base URL Processing ......................................................................................................................... 64
5.7 Program information ........................................................................................................................... 66
5.8 Descriptors ........................................................................................................................................... 67
5.9 DASH metrics descriptor .................................................................................................................... 74
5.10 Events ................................................................................................................................................... 75
6 Segment formats ................................................................................................................................. 82
6.1 Introduction .......................................................................................................................................... 82
6.2 Segment types ..................................................................................................................................... 83
6.3 Segment formats for ISO base media file format ............................................................................. 85
6.4 Segment formats for MPEG-2 transport streams ............................................................................. 88
7 Combined semantics of MPD and Segment formats ....................................................................... 94
7.1 Introduction .......................................................................................................................................... 94
7.2 General ................................................................................................................................................. 95
7.3 Media Presentation based on the ISO base media file format ........................................................ 96
7.4 Media Presentation based on MPEG-2 TS ........................................................................................ 98
8 Profiles................................................................................................................................................ 100
8.1 Definition ............................................................................................................................................ 100
8.2 Full profile .......................................................................................................................................... 101
8.3 ISO Base media file format On Demand profile ............................................................................. 101
8.4 ISO Base media file format live profile ............................................................................................ 103
8.5 ISO Base media file format main profile ......................................................................................... 104
8.6 MPEG-2 TS main profile .................................................................................................................... 105
8.7 MPEG-2 TS simple profile ................................................................................................................. 106
Annex A (informative) Example DASH client behaviour ............................................................................. 108
A.1 Introduction ........................................................................................................................................ 108
ISO/IEC 23009-1:2014(E)
iv © ISO/IEC 2014 – All rights reserved
A.2 Overview ............................................................................................................................................ 108
A.3 Segment list generation ................................................................................................................... 109
A.4 Seeking .............................................................................................................................................. 112
A.5 Support for trick modes ................................................................................................................... 113
A.6 Switching Representations .............................................................................................................. 113
A.7 Reaction to error codes ................................................................................................................... 113
A.8 Encoder clock drift control .............................................................................................................. 114
Annex B (normative) MPD schema ............................................................................................................... 115
Annex C (normative) MIME type registration for MPD ............................................................................... 121
C.1 Introduction ....................................................................................................................................... 121
C.2 MIME type and subtype .................................................................................................................... 121
C.3 Parameters ........................................................................................................................................ 122
C.4 MPD Anchors .................................................................................................................................... 122
Annex D (normative) DASH Metrics ............................................................................................................. 124
D.1 Introduction ....................................................................................................................................... 124
D.2 DASH-Metrics client reference model............................................................................................. 124
D.3 Definition of observation points ...................................................................................................... 124
D.4 Semantics of the DASH metrics ...................................................................................................... 125
Annex E (normative) Byte range requests with regular HTTP GET methods .......................................... 131
E.1 Background ....................................................................................................................................... 131
E.2 Construction rule .............................................................................................................................. 131
E.3 Examples ........................................................................................................................................... 132
Annex F (informative) Guidelines for extending DASH with other delivery formats ............................... 133
F.1 Adding delivery formats to DASH ................................................................................................... 133
F.2 Media Presentation authoring rules................................................................................................ 133
Annex G (informative) MPD Examples and MPD Usage ............................................................................. 134
G.1 Example MPD for ISO Base media file format On Demand profile .............................................. 134
G.2 Example for ISO Base media file format Live profile .................................................................... 135
G.3 Example for MPEG-2 TS Simple profile .......................................................................................... 136
G.4 Example for multiple stereo views .................................................................................................. 137
G.5 Example for SVC alternative streams ............................................................................................. 138
G.6 Example for trick play support ........................................................................................................ 139
G.7 Example for content protected by multiple schemes ................................................................... 140
G.8 Example for usage of Role descriptor ............................................................................................ 141
G.9 Example for usage of Event Messaging ......................................................................................... 142
Bibliography ................................................................................................................................................... 144
ISO/IEC 23009-1:2014(E)
© ISO/IEC 2014 – All rights reserved v
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 23009-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
This second edition cancels and replaces the first edition (ISO/IEC 23009-1:2012), which has been technically
revised. It also incorporates the Technical Corrigendum ISO/IEC 23009-1:2012/Cor.1:2013.
ISO/IEC 23009 consists of the following parts, under the general title Information technology — Dynamic
adaptive streaming over HTTP (DASH):
Part 1: Media presentation description and segment formats
Part 2: Conformance and reference software
Part 3: Implementation guidelines [Technical Report]
Part 4: Segment encryption and authentication
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