ISO/IEC 23008-1:2023

INTERNATIONAL ISO/IEC
STANDARD 23008-1
Third edition
2023-01
Information technology — High
efficiency coding and media delivery
in heterogeneous environments —
Part 1:
MPEG media transport (MMT)
Technologies de l'information — Codage à haute efficacité et livraison
des medias dans des environnements hétérogènes —
Partie 1: Transport des médias MPEG
Reference number
© ISO/IEC 2023
© ISO/IEC 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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© ISO/IEC 2023 – All rights reserved

Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms . 4
4 Conventions . 6
5 Overview . 6
6 MMT data model . 9
6.1 General . 9
6.2 Package . 9
6.3 Asset . 10
6.4 Media processing unit (MPU) . 11
6.5 Asset delivery characteristics.12
6.5.1 General .12
6.5.2 ADC descriptors .12
6.5.3 Syntax . 13
6.5.4 Semantics . 14
6.6 Bundle delivery characteristics .15
6.6.1 General .15
6.6.2 BDC descriptors . 15
6.6.3 Syntax . .15
6.6.4 Semantics . 16
7 ISOBMFF-based MPU .17
7.1 General . 17
7.2 MPU brand definition . 18
7.3 MPU box . 19
7.3.1 Definition . 19
7.3.2 Syntax . . 19
7.3.3 Semantics . 20
8 MMT hint track .20
8.1 General . 20
8.2 Sample description format . 21
8.2.1 Definition . 21
8.2.2 Syntax . 21
8.2.3 Semantics . 21
8.3 Sample format . 21
8.3.1 Definition . 21
8.3.2 Syntax . . 21
8.3.3 Semantics . 22
9 Packetized delivery of Package .23
9.1 General .23
9.2 MMT protocol . 23
9.2.1 General .23
9.2.2 Structure of an MMTP packet . 24
9.2.3 Semantics . 25
9.2.4 MMTP session description information .29
9.3 MMTP payload .29
9.3.1 General .29
9.3.2 MPU mode . 30
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© ISO/IEC 2023 – All rights reserved

9.3.3 Generic file delivery mode . 32
9.3.4 Signalling message mode . 36
9.4 MMTP operation . 37
9.4.1 General . 37
9.4.2 Delivering MPUs .38
9.4.3 Delivering generic objects .40
9.4.4 Header compression for MMTP packet. 43
10 Signalling .45
10.1 General . 45
10.2 Signalling message format . 45
10.2.1 General . 45
10.2.2 Syntax . 45
10.2.3 Semantics .46
10.3 Signalling messages for Package consumption .46
10.3.1 General .46
10.3.2 PA message . 47
10.3.3 MPI message .48
10.3.4 MPT message .49
10.3.5 CRI message .50
10.3.6 DCI message . 51
10.3.7 PA table . 52
10.3.8 MPI table . 53
10.3.9 MP table . 56
10.3.10 CRI table . 59
10.3.11 DCI table .60
10.3.12 Layout Configuration Table . 61
10.3.13 SSWR message.63
10.3.14 LS message .64
10.3.15 LR message .65
10.3.16 SI table .66
10.4 Signalling messages for Package delivery . 70
10.4.1 Hypothetical receiver buffer model (HRBM) message . 70
10.4.2 Measurement configuration (MC) message . 71
10.4.3 ARQ configuration (AC) message .73
10.4.4 ARQ feedback (AF) message .74
10.4.5 Reception quality feedback (RQF) message .77
10.4.6 NAM feedback (NAMF) message . 79
10.4.7 Low delay consumption (LDC) message .81
10.4.8 Hypothetical receiver buffer model (HRBM) removal message .82
10.4.9 ADC message .84
10.4.10 NAT_Keepalive (NK) message .87
10.4.11 Media Resource Identification (MRI) message .88
10.4.12 Consumption reporting (CR) message .90
10.4.13 Distributed Resource Identification (DRI) message . 91
10.4.14 Distributed Signaling Information (DSI) message .94
10.4.15 Bandwidth Probing reQuest (BPQ) message .97
10.4.16 Bandwidth Probing Response (BPR) message .98
10.4.17 Pacing Buffer Removal Rate (PRR) message .100
10.4.18 Pacing Buffer Status Feedback (PSF) message. 101
10.4.19 Cell congestion information messages .102
10.4.20 MMT Transition Request (MTR) message .103
10.4.21 MMT Transition Notification (MTN) message .105
10.4.22 Asset Change Request (ACR) message .109
10.4.23 CMAF Presentation Description (CPD) Messages .112
10.4.24 Content Selection (CS) Message .113
10.4.25 RTSP message . 114
10.4.26 VAST/VMAP Message .115
10.4.27 Service List (SL) information message . 117
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© ISO/IEC 2023 – All rights reserved

10.5 Descriptors. 119
10.5.1 CRI descriptor . 119
10.5.2 MPU timestamp descriptor . 119
10.5.3 Dependency descriptor . .120
10.5.4 GFDT descriptor .121
10.5.5 SI descriptor .123
10.5.6 MMT Service Descriptor .124
10.5.7 Mobile information descriptor .127
10.5.8 Media quality descriptor .128
10.5.9 MPU Presentation Region Descriptor .129
10.5.10 Asset Group Descriptor .130
10.5.11 Access Network Descriptor .131
10.5.12 Subtitle Change descriptor .132
10.5.13 AT descriptor .135
10.6 Syntax element groups .136
10.6.1 MMT_general_location_info .136
10.6.2 asset_id .139
10.6.3 Identifier mapping .139
10.6.4 MIME type . 141
10.7 ID and tags values . 141
11 Hypothetical receiver buffer model (HRBM) . 144
11.1 General .144
11.2 FEC decoding buffer .144
11.3 De-jitter buffer . 145
11.4 MMTP packet decapsulation buffer . 145
11.5 Usage of HRBM .146
11.6 Estimation of end-to-end delay and buffer requirement .146
11.7 HRBM signalling .146
11.8 HRBM with pacing buffer . .146
12 Cross layer interface (CLI) .147
12.1 General . 147
12.2 Cross layer information . 147
12.2.1 General . 147
12.2.2 Top-down QoS information . 147
12.2.3 Bottom-up QoS information . 147
12.2.4 Network abstraction for media (NAM) . 147
12.2.5 Syntax . .148
12.2.6 Semantics .148
13 MMTP Session Setup and Control over Unicast . 149
13.1 Session Description for MMTP . 149
13.1.1 MMTP Protocol Identifier .150
13.1.2 Object Flow Semantics .150
13.1.3 Object Flow Descriptors .150
13.1.4 SDP Syntax Examples .151
13.2 RTSP .151
13.2.1 General .151
13.2.2 MMT Range Format .152
13.2.3 MMT sub-flow Parameter .152
13.3 WebSockets for MMTP . .152
13.3.1 General .152
13.3.2 Upgrade to MMT over WebSocket .152
13.3.3 Framing in the MMT sub-protocol . .153
13.3.4 Sub-protocol Registration .154
13.4 Multipath Support in MMTP .154
13.4.1 General .154
13.4.2 Multipath Negotiation .155
13.4.3 Session Modification with Multipath .157
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© ISO/IEC 2023 – All rights reserved

13.4.4 Feedback Message Enhancements .158
14 CDN Support . 158
14.1 General .158
14.2 DNS Resolution of MMT URLs .159
14.2.1 General .159
14.2.2 DNS query message for MMT URLs .159
14.2.3 DNS response message for MMT URLs .159
14.2.4 DNS update message of MMT URLs . 161
14.2.5 Media Resource Update (MRU) Message . 161
14.2.6 MRI Request (MRIR) message .164
14.3 MANE .165
14.3.1 Definition .165
14.3.2 Interface between MMT sending entity and MANE .165
14.3.3 Authentication / Authorization. 167
14.3.4 Creation of a MMTP session .168
14.3.5 Creation of MMTP flow .168
14.3.6 MMTP session update . 170
14.3.7 MMTP flow update . 171
14.3.8 Termination of MMTP session . 171
14.3.9 Termination of MMTP flow .172
14.3.10 MMTP session query to MANE .173
14.3.11 MMTP session measurement feedback .173
15 FCAST support in MMT .174
15.1 General . 174
15.2 MMT signalling of resources delivered using FCAST . . 175
15.2.1 General .175
15.2.2 Syntax of FCAST location type . 175
15.2.3 Semantics . 175
15.3 FCAST over MMTP . . 176
15.3.1 MMTP packet header for FCAST . 176
15.3.2 MMTP payload header for FCAST mode . 176
15.3.3 Signalling in MPT for FCAST .177
15.3.4 FCAST descriptor .177
15.3.5 Metadata collection object . . 178
Annex A (informative) Jitter calculation in MMTP .179
Annex B (normative) XML syntax and MIME type for signalling message . 180
Annex C (normative) Application layer forward error correction (AL-FEC) framework for
MMT . 187
Annex D (informative) QoS management model for MMT . 211
Annex E (informative) Operation of downloadable DRM and CAS . 213
Annex F (informative) DASH segment over MMTP .214
Annex G (normative) Scheme of MMT URI .217
Annex H (normative) Transactions on Generic Data Carried over MPEG-H 3D Audio . 218
Annex I (informative) Session Migration from HTTP . 220
Annex J (informative) MBMS Content Ingestion . 222
Annex K (informative) Configuration example . 225
Annex L (normative) MMT Mapping of CMAF content . 229
Annex M (normative) Carriage of EVC . 232
Bibliography . 233
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© ISO/IEC 2023 – All rights reserved

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.
The procedures used to develop this document and those intended for its further maintenance
are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria
needed for the different types of document should be noted. This document was drafted in
accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or
www.iec.ch/members_experts/refdocs).
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. Details of any patent rights identified during the development of the document will be in the
Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC
list of patent declarations received (see https://patents.iec.ch).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
This third edition cancels and replaces the second edition (ISO/IEC 23008-1:2017), which has been
technically revised. It also incorporates the Amendment ISO/IEC 23008-1:2017/Amd 1:2017.
The main changes are as follows:
— addition of signalling message for layout configuration;
— addition of signalling messages related to delivery over mobile networks;
— addition of signalling messages to support multipath delivery;
— addition of procedcure for session setup and control;
— addition of procedcure for using WebSockets.
A list of all parts in the ISO/IEC 23008 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.
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© ISO/IEC 2023 – All rights reserved

Introduction
This document specifies the MPEG media transport (MMT) technologies for the transport and delivery
of coded media data for multimedia services over heterogeneous packet-switched networks including
internet protocol (IP) networks and digital broadcasting networks. In this document, “coded media
data” includes both timed audiovisual media data and non-timed data.
MMT is designed under the assumption that the coded media data will be delivered over a packet-
switched delivery network. Several characteristics of such delivery environment, such as non-constant
end-to-end delay of each packet from the sending entity to the receiving entity, have been taken into
consideration.
For efficient and effective delivery and consumption of coded media data over packet-switched delivery
networks, this document provides the following elements:
— the logical model to construct contents composed of components from various sources, for example,
components of mash-up applications;
— the formats to convey information about the coded media data, to enable delivery layer processing,
such as packetization;
— the packetization method and the structure of the packet to deliver media content over packet-
switched networks supporting media and coding independent hybrid delivery over multiple
chan
...