ISO/IEC 23009-1:2019
(Main)Information technology — Dynamic adaptive streaming over HTTP (DASH) — Part 1: Media presentation description and segment formats
Information technology — Dynamic adaptive streaming over HTTP (DASH) — Part 1: Media presentation description and segment formats
This document primarily specifies formats for the Media Presentation Description and Segments for dynamic adaptive streaming delivery of MPEG media over HTTP. It is applicable to streaming services over the Internet.
Technologies de l'information — Diffusion en flux adaptatif dynamique sur HTTP (DASH) — Partie 1: Description de la présentation et formats de remise des médias
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INTERNATIONAL ISO/IEC
STANDARD 23009-1
Third edition
2019-08
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
Reference number
ISO/IEC 23009-1:2019(E)
©
ISO/IEC 2019
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ISO/IEC 23009-1:2019(E)
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ISO/IEC 23009-1:2019(E)
Contents Page
Foreword .vii
Introduction .ix
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. 6
3.3 Conventions . 8
4 Overview . 8
4.1 System description . 8
4.2 DASH Client model . 9
4.3 DASH data model overview .10
4.4 Protocols .13
4.5 Media stream and Representation properties .14
4.5.1 Switching and Random Access Support .14
4.5.2 Media stream access points .14
4.5.3 Non-overlapping Segments and Subsegments.15
4.5.4 Bitstream concatenation .16
4.6 Brands .16
4.7 Schemes .16
5 Media Presentation .19
5.1 General .19
5.2 Media Presentation Description .19
5.2.1 General.19
5.2.2 Schema.20
5.2.3 Elements and Attributes added in revisions and amendments .21
5.3 Hierarchical data model .22
5.3.1 General.22
5.3.2 Period .27
5.3.3 Adaptation Sets .31
5.3.4 Media content component .42
5.3.5 Representation .44
5.3.6 Sub-Representation .52
5.3.7 Common attributes and elements.53
5.3.8 Subsets .59
5.3.9 Segments and Segment information .60
5.3.10 Label and Group Label .78
5.3.11 Preselection .79
5.4 Media Presentation Description updates .82
5.4.1 General.82
5.4.2 MPD Reset .83
5.5 MPD assembly.83
5.5.1 General.83
5.5.2 Syntax and semantics.83
5.5.3 Processing .84
5.6 Base URL Processing .85
5.6.1 Overview .85
5.6.2 Semantics .85
5.6.3 XML syntax .86
5.6.4 Reference resolution.87
5.6.5 Alternative base URLs .87
5.7 Program information .87
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ISO/IEC 23009-1:2019(E)
5.7.1 Overview .87
5.7.2 Semantics .87
5.7.3 XML syntax .88
5.8 Descriptors .88
5.8.1 General.88
5.8.2 Semantics of generic descriptor .89
5.8.3 XML syntax of generic descriptor .90
5.8.4 Specific descriptors .90
5.8.5 Specific scheme definitions .93
5.9 DASH metrics descriptor .101
5.9.1 Overview .101
5.9.2 Semantics .101
5.9.3 XML syntax .102
5.9.4 Metric reporting .103
5.10 Events .103
5.10.1 Overview .103
5.10.2 MPD Events .103
5.10.3 Inband Event Signalling .106
5.10.4 DASH-specific events .109
5.11 MPD Chaining .112
5.11.1 General.112
5.11.2 Regular Chaining .112
5.11.3 Fallback Chaining .113
6 Segment formats .113
6.1 General .113
6.2 Segment types .114
6.2.1 General.114
6.2.2 Initialization Segment .114
6.2.3 Media Segment .114
6.2.4 Index Segment . .116
6.2.5 Bitstream Switching Segment.116
6.3 Segment formats for ISO base media file format .116
6.3.1 General.116
6.3.2 Preliminaries: Refinements of generic concepts .116
6.3.3 Initialization Segment format .117
6.3.4 Media Segment types .117
6.3.5 Self-Initializing Media Segment formats .119
6.4 Segment formats for MPEG-2 transport streams .119
6.4.1 General.119
6.4.2 Preliminaries: Refinements of generic concepts .120
6.4.3 Initialization Segment types and formats .121
6.4.4 Media Segment types and formats .122
6.4.5 Bitstream Switching Segment.122
6.4.6 Index Segment . .123
6.4.7 Boxes used with MPEG-2 TS Index Segments .125
7 Combined semantics of MPD and Segment formats .125
7.1 Overview .125
7.2 General .126
7.2.1 Media Presentation timeline .126
7.2.2 Segment Index . .127
7.2.3 Segment alignment .127
7.2.4 Subsegment alignment .127
7.3 Media Presentation based on the ISO base media file format .127
7.3.1 General.127
7.3.2 Media presentation timeline .128
7.3.3 Authoring Rules for specific MPD attributes .128
7.3.4 Sub-Representations .129
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ISO/IEC 23009-1:2019(E)
7.3.5 Segment Timeline without Segment Index .129
7.4 Media Presentation based on MPEG-2 TS .129
7.4.1 General.129
7.4.2 Media presentation timeline .130
7.4.3 Authoring rules for specific MPD attributes .130
7.4.4 Sub-Representations .131
8 Profiles .131
8.1 Definition .131
8.2 Full profile .133
8.2.1 General.133
8.2.2 Media Presentation Description constraints .133
8.2.3 Segment format constraints .133
8.3 ISO Base media file format On Demand profile .133
8.3.1 General.133
8.3.2 Media Presentation Description constraints .133
8.3.3 Segment format constraints .134
8.4 ISO Base media file format live profile .134
8.4.1 General.134
8.4.2 Media Presentation Description constraints .135
8.4.3 Segment format constraints .135
8.5 ISO Base media file format main profile .136
8.5.1 General.136
8.5.2 Media Presentation Description constraints .136
8.5.3 Segment format constraints .136
8.6 MPEG-2 TS main profile .137
8.6.1 General.137
8.6.2 Media Presentation Description constraints .137
8.6.3 Segment format constraints .137
8.6.4 Comments and recommendations .137
8.7 MPEG-2 TS simple profile .138
8.7.1 General.138
8.7.2 Media Presentation Description constraints .138
8.7.3 Segment format constraints .138
8.7.4 Recommendations .138
8.8 ISO Base media file format extended live profile.139
8.8.1 General.139
8.8.2 Media Presentation Description constraints .139
8.8.3 Segment format constraints .140
8.8.4 Inband Events .140
8.9 ISO Base media file format extended On Demand profile .140
8.9.1 General.140
8.9.2 Media Presentation Description constraints .140
8.9.3 Segment format constraints .141
8.10 ISO Base media file format common profile .142
8.10.1 General.142
8.10.2 Media Presentation Description constraints .142
8.10.3 Segment format constraints .142
8.11 ISO Base media file format broadcast TV profile .142
8.11.1 General.142
8.11.2 Media Presentation Description constraints .143
8.11.3 Segment format constraints .144
8.11.4 MPD Updates and Inband Event Streams .
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