ISO/IEC 23008-4:2020

INTERNATIONAL ISO/IEC
STANDARD 23008-4
First edition
2020-06
Information technology — High
efficiency coding and media delivery
in heterogeneous environments —
Part 4:
MMT reference software
Technologies de l'information — Codage à haute efficacité et livraison
des medias dans des environnements hétérogènes —
Partie 4: Logiciel de référence pour le transport des médias MPEG
(MMT)
Reference number
©
ISO/IEC 2020
© ISO/IEC 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 1
5 Configuration file format . 6
6 Version control and compiling . 7
7 Execution . 7
© ISO/IEC 2020 – All rights reserved iii

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).
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 http:// 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.
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.
A list of all parts in the ISO/IEC 23008 series can be found on the ISO website.
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.
iv © ISO/IEC 2020 – All rights reserved

Introduction
The MMT reference and conformance software is defined as part of the MPEG-H standard in this
document. This document outlines the MMT reference and conformance software and describes how it
is used for conformance testing. It also collects a list of MMT features that need to be verified as part of
conformance testing.
The attachment, available at https:// standards .iso .org/ iso -iec/ 23008/ -4/ ed -1/ en, contains the updated
reference software source code implementing the MPEG media transport: MMT.tar.gz.
© ISO/IEC 2020 – All rights reserved v

INTERNATIONAL STANDARD ISO/IEC 23008-4:2020(E)
Information technology — High efficiency coding and
media delivery in heterogeneous environments —
Part 4:
MMT reference software
1 Scope
This document provides the reference software for MMT and its description.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/IEC 23008-1, Information technology — High efficiency coding and media delivery in heterogeneous
environments — Part 1: MPEG media transport (MMT)
3 Terms and definitions
For the purposes of this document, the following terms and definitions given in ISO/IEC 23008-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
4 General
The reference and conformance software operates according to Figure 1. It takes as input the MPUs,
generic files and signalling messages that are to be transmitted. The MMTP sender then generates the
MMTP flow as a multiplex of MMTP packets from the different sources and uses BSD sockets to send
them to a pre-configured destination IP address and port number using MMTP over UDP. The MMTP
receiver de-multiplexes the MMTP flow based on the packet_id and the mode and passes the packets
to the corresponding reconstruction module. The reconstruction module extracts the payload and
reconstructs the resource (i.e. the MPU, the generic file, or the signalling message).
© ISO/IEC 2020 – All rights reserved 1

Figure 1 — Operation of reference and conformance software
Figures 2 and 3 depict the structure and class diagram of the reference and conformance software. The
yellow, orange and green boxes indicate classes, general or binary files (MPU, generic, configuration,
and packet dump), and XML files respectively.
Figure 2 — Class diagram of MMTP sender
2 © ISO/IEC 2020 – All rights reserved
...