ISO_IEC23009-1_2022最新版MPEG-DASH标准资源-CSDN文库

MPEG

DASH

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Information technology — Dynamic

adaptive streaming over HTTP

(DASH) —

Part 1:

Media presentation description and

segment formats

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dynamique sur HTTP (DASH) —

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

INTERNATIONAL

STANDARD

ISO/IEC

23009-1

Fifth edition

2022-08

Reference number

ISO/IEC 23009-1:2022(E)

Contents

Foreword .............................................................................................................................................................. vii

Introduction ....................................................................................................................................................... viii

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 ............................................................................................................. 7

3.3 Conventions ................................................................................................................................................... 9

4 Overview ...................................................................................................................................................... 10

4.1 System description ................................................................................................................................... 10

4.2 DASH Client model .................................................................................................................................... 11

4.3 DASH data model overview ................................................................................................................... 12

4.4 Protocols ...................................................................................................................................................... 15

4.5 Media stream and Representation properties ............................................................................... 16

4.5.1 Switching and Random Access Support ...................................................................................... 16

4.5.2 Media stream access points ............................................................................................................ 16

4.5.3 Non-overlapping Segments and Subsegments ......................................................................... 17

4.5.4 Conforming Segment track .............................................................................................................. 18

4.6 Brands ........................................................................................................................................................... 18

4.7 Schemes ........................................................................................................................................................ 19

5 Media Presentation .................................................................................................................................. 22

5.1 General .......................................................................................................................................................... 22

5.2 Media Presentation Description .......................................................................................................... 22

5.2.1 General ................................................................................................................................................... 22

5.2.2 Schema .................................................................................................................................................... 23

5.2.3 Elements and Attributes added in revisions and amendments ......................................... 24

5.3 Hierarchical data model ......................................................................................................................... 26

5.3.1 General ................................................................................................................................................... 26

5.3.2 Period ...................................................................................................................................................... 33

5.3.3 Adaptation Sets .................................................................................................................................... 39

5.3.4 Media content component ............................................................................................................... 50

5.3.5 Representation .................................................................................................................................... 51

5.3.6 Sub-Representation ........................................................................................................................... 62

5.3.7 Common attributes and elements ................................................................................................ 63

5.3.8 Subsets .................................................................................................................................................... 70

5.3.9 Segments and Segment information ............................................................................................ 71

5.3.10 Label and Group Label ...................................................................................................................... 93

5.3.11 Preselection .......................................................................................................................................... 95

5.3.12 Initialization Set, Group and Presentation ................................................................................ 99

5.3.13 Resynchronization .......................................................................................................................... 103

5.4 Media Presentation Description updates ...................................................................................... 106

5.4.1 General ................................................................................................................................................ 106

5.4.2 MPD Reset ........................................................................................................................................... 108

5.5 MPD assembly ......................................................................................................................................... 108

5.5.1 General ................................................................................................................................................ 108

5.5.2 Syntax and semantics ..................................................................................................................... 108

5.5.3 Processing .......................................................................................................................................... 109

5.6 Base URL Processing ............................................................................................................................. 110

ISO/IEC 23009-1:2022(E)

5.6.1 Overview ............................................................................................................................................. 110

5.6.2 Semantics ............................................................................................................................................ 111

5.6.3 XML syntax .......................................................................................................................................... 112

5.6.4 Reference resolution ....................................................................................................................... 112

5.6.5 Alternative base URLs..................................................................................................................... 113

5.7 Program information ............................................................................................................................ 113

5.7.1 Overview ............................................................................................................................................. 113

5.7.2 Semantics ............................................................................................................................................ 113

5.7.3 XML syntax .......................................................................................................................................... 114

5.8 Descriptors ............................................................................................................................................... 114

5.8.1 General ................................................................................................................................................. 114

5.8.2 Semantics of generic descriptor ................................................................................................. 115

5.8.3 XML syntax of generic descriptor ............................................................................................... 115

5.8.4 Specific descriptors ......................................................................................................................... 116

5.8.5 Specific scheme definitions .......................................................................................................... 122

5.9 DASH metrics descriptor ..................................................................................................................... 133

5.9.1 Overview ............................................................................................................................................. 133

5.9.2 Semantics ............................................................................................................................................ 133

5.9.3 XML syntax .......................................................................................................................................... 134

5.9.4 Metric reporting ............................................................................................................................... 135

5.10 Events ................................................................................................................................................... 135

5.10.1 Overview ............................................................................................................................................. 135

5.10.2 MPD Events ......................................................................................................................................... 135

5.10.3 Inband Event Signalling ................................................................................................................. 139

5.10.4 DASH-specific events....................................................................................................................... 142

5.11 MPD Chaining .................................................................................................................................... 146

5.11.1 General ................................................................................................................................................. 146

5.11.2 Regular Chaining .............................................................................................................................. 146

5.11.3 Fallback Chaining ............................................................................................................................. 147

5.12 Producer Reference Time ............................................................................................................. 148

5.12.1 General ................................................................................................................................................. 148

5.12.2 Semantics ............................................................................................................................................ 148

5.12.3 XML Syntax ......................................................................................................................................... 150

5.13 Leap seconds ...................................................................................................................................... 150

5.13.1 Overview ............................................................................................................................................. 150

5.13.2 Semantics ............................................................................................................................................ 151

5.13.3 XML-Syntax ......................................................................................................................................... 151

5.13.4 Leap second information updates .............................................................................................. 152

5.14 Content Popularity Rate ................................................................................................................ 152

5.14.1 General ................................................................................................................................................. 152

5.14.2 Semantics ............................................................................................................................................ 153

5.14.3 XML syntax .......................................................................................................................................... 154

5.15 MPD patch framework.................................................................................................................... 155

5.15.1 Overview ............................................................................................................................................. 155

5.15.2 MPD Patch Location ......................................................................................................................... 155

5.15.3 MPD patch document ...................................................................................................................... 156

5.15.4 Processing Model ............................................................................................................................. 158

5.15.5 Recommended Client Operation ................................................................................................. 159

6 Segment formats ..................................................................................................................................... 159

6.1 General ....................................................................................................................................................... 159

6.2 Segment types .......................................................................................................................................... 160

6.2.1 General ................................................................................................................................................. 160

6.2.2 Initialization Segment .................................................................................................................... 160

6.2.3 Media Segment .................................................................................................................................. 160

ISO/IEC 23009-1:2022(E)

6.2.4 Index Segment .................................................................................................................................. 162

6.2.5 Bitstream Switching Segment ..................................................................................................... 162

6.2.6 Missing Content Segment .............................................................................................................. 162

6.3 Segment formats for ISO base media file format ........................................................................ 162

6.3.1 General ................................................................................................................................................ 162

6.3.2 Preliminaries: Refinements of generic concepts ................................................................. 163

6.3.2.5 Resynchronization Point .............................................................................................................. 163

6.3.3 Initialization Segment format ..................................................................................................... 164

6.3.4 Media Segment types ...................................................................................................................... 164

6.3.5 Self-Initializing Media Segment formats ................................................................................. 166

6.4 Segment formats for MPEG-2 transport streams ....................................................................... 166

6.4.1 General ................................................................................................................................................ 166

6.4.2 Preliminaries: Refinements of generic concepts ................................................................. 167

6.4.3 Initialization Segment types and formats ............................................................................... 168

6.4.4 Media Segment types and formats ............................................................................................ 169

6.4.5 Bitstream Switching Segment ..................................................................................................... 169

6.4.6 Index Segment .................................................................................................................................. 170

6.4.7 Boxes used with MPEG-2 TS Index Segments ........................................................................ 172

7 Combined semantics of MPD and Segment formats .................................................................. 172

7.1 Overview ................................................................................................................................................... 172

7.2 General ....................................................................................................................................................... 173

7.2.1 Media Presentation timeline ....................................................................................................... 173

7.2.2 Segment Index .................................................................................................................................. 174

7.2.3 Segment alignment ......................................................................................................................... 174

7.2.4 Subsegment alignment .................................................................................................................. 174

7.3 Media Presentation based on the ISO base media file format ............................................... 174

7.3.1 General ................................................................................................................................................ 174

7.3.2 Media presentation timeline ....................................................................................................... 175

7.3.3 Authoring Rules for specific MPD attributes ......................................................................... 175

7.3.4 Sub-Representations ...................................................................................................................... 176

7.3.5 Segment Timeline without Segment Index ............................................................................. 176

7.4 Media Presentation based on MPEG-2 TS ..................................................................................... 176

7.4.1 General ................................................................................................................................................ 176

7.4.2 Media presentation timeline ....................................................................................................... 177

7.4.3 Authoring rules for specific MPD attributes .......................................................................... 177

7.4.4 Sub-Representations ...................................................................................................................... 178

8 Profiles ....................................................................................................................................................... 178

8.1 Definition .................................................................................................................................................. 178

8.2 Full profile ................................................................................................................................................ 180

8.2.1 General ................................................................................................................................................ 180

8.2.2 Media Presentation Description constraints ......................................................................... 180

8.2.3 Segment format constraints ........................................................................................................ 180

8.3 ISO Base media file format On Demand profile ........................................................................... 180

8.3.1 General ................................................................................................................................................ 180

8.3.2 Media Presentation Description constraints ......................................................................... 181

8.3.3 Segment format constraints ........................................................................................................ 182

8.4 ISO Base media file format live profile ........................................................................................... 182

8.4.1 General ................................................................................................................................................ 182

8.4.2 Media Presentation Description constraints ......................................................................... 182

8.4.3 Segment format constraints ........................................................................................................ 183

8.5 ISO Base media file format main profile ........................................................................................ 183

8.5.1 General ................................................................................................................................................ 183

8.5.2 Media Presentation Description constraints ......................................................................... 184