ISO/IEC 23090-17:2021

Information technology — Coded representation of immersive media — Part 17: Reference software and conformance for omnidirectional media format (OMAF)

This document specifies the conformance and reference software for omnidirectional media format (specified in ISO/IEC 23090‑2). This document describes the reference software modules and the features that is supports. It also provides a description of how the reference software can be utilized. In addition, the document lists and describes test vectors comprising ISO base media file format files, media presentation descriptions, segments and combinations thereof that conform to ISO/IEC 23090‑2.

Technologies de l'information — Représentation codée de média immersifs — Partie 17: Logiciel de référence et conformité pour le format de média omnidirectionnel (OMAF)

General Information

• Status: Published
• Publication Date: 21-Oct-2021
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29/WG 3 - MPEG Systems
• Current Stage: 6060 - International Standard published
• Start Date: 22-Oct-2021
• Due Date: 18-Aug-2021
• Completion Date: 22-Oct-2021

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 23090-17
First edition
2021-10
Information technology — Coded
representation of immersive media —
Part 17:
Reference software and conformance
for omnidirectional media format
(OMAF)
Technologies de l'information — Représentation codée de média
immersifs —
Partie 17: Logiciel de référence et conformité pour le format de média
omnidirectionnel (OMAF)
Reference number
ISO/IEC 23090-17:2021(E)
© ISO/IEC 2021

---------------------- Page: 1 ----------------------
ISO/IEC 23090-17:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2021
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO/IEC 2021 – All rights reserved

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ISO/IEC 23090-17:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 1
5 Reference software for ISO/IEC 23090-2 . 2
5.1 General . 2
5.2 Description . 2
5.3 Feature support list . 2
5.4 Reference software data structures mapping . 3
5.5 Usage of omaf_tool. 3
5.5.1 General . 3
5.5.2 Syntax for printing a description of parameters . 4
5.5.3 Packaging . 4
5.5.4 Parsing . 4
5.6 Copyright disclaimer for software modules . 4
6 Conformance for ISO/IEC 23090-2 .5
6.1 General . 5
6.2 Description of conformance files . 5
Bibliography . 9
iii
© ISO/IEC 2021 – All rights reserved

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ISO/IEC 23090-17:2021(E)
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.
A list of all parts in the ISO/IEC 23090 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.
iv
  © ISO/IEC 2021 – All rights reserved

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ISO/IEC 23090-17:2021(E)
Introduction
The conformance and reference software in this document serves two main purposes:
— validation of the written specification of ISO/IEC 23090-2;
— conformance testing for checking interoperability for the various applications against the reference
software which aims to be compliant with ISO/IEC 23090-2.
v
© ISO/IEC 2021 – All rights reserved

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INTERNATIONAL STANDARD ISO/IEC 23090-17:2021(E)
Information technology — Coded representation of
immersive media —
Part 17:
Reference software and conformance for omnidirectional
media format (OMAF)
1 Scope
This document specifies the conformance and reference software for omnidirectional media format
(specified in ISO/IEC 23090-2). This document describes the reference software modules and the
features that is supports. It also provides a description of how the reference software can be utilized.
In addition, the document lists and describes test vectors comprising ISO base media file format files,
media presentation descriptions, segments and combinations thereof that conform to ISO/IEC 23090-2.
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 23090-2, Information technology — Coded representation of immersive media — Part 2:
Omnidirectional media format
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 23090-2 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Abbreviated terms
2D two-dimensional
DASH MPEG dynamic adaptive streaming over HTTP (specified in ISO/IEC 23009-1)
HEVC high efficiency video coding
IDR instantaneous decoder refresh
ISOBMFF ISO base media file format (specified in ISO/IEC 14496-12)
JSON JavaScript object notation
1
© ISO/IEC 2021 – All rights reserved

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ISO/IEC 23090-17:2021(E)
MPD media presentation description
OMAF omnidirectional media format
5 Reference software for ISO/IEC 23090-2
5.1 General
The reference software is available at: https:// standards .iso .org/ iso -iec/ 23090/ -17/ ed -1/ en/ .
5.2 Description
The OMAF reference software has two components: libomaf and omaf_tool. The libomaf library
provides an extension to MPEG’s ISOBMFF library (libisomediafile), described in ISO/IEC 14496-32,
by defining and implementing OMAF-related atoms and providing functions to create and parse these
atoms. The omaf_tool software uses libomaf and is able to parse and display OMAF metadata present in
an ISOBMFF container files.
Both libomaf and omaf_tool are implemented using the C/C++ language. The software uses the CMake
tool for managing the build process and enabling cross-platform compilation. The libomaf library can
also be used independently from the omaf_tool by including the omaf.h header file in the user’s code and
linking to the library.
5.3 Feature support list
Table 1 provides a complete list of features available in ISO/IEC 23090-2 and indicates which features
are currently supported by the reference software.
Table 1 — OMAF reference software feature support list
OMAF Support
Feature
Parsing Packaging
version
Restricted schemes for omnidirectional videos 1  
Projected omnidirectional video 1  
Equirectangular projected video 1  
Packed equirectangular or cube map video 1  
 
Fisheye omnidirectional vi
...

INTERNATIONAL ISO/IEC
STANDARD 23090-17
First edition
Information technology — Coded
representation of immersive media —
Part 17:
Reference software and conformance
for omnidirectional media format
(OMAF)
PROOF/ÉPREUVE
Reference number
ISO/IEC 23090-17:2021(E)
©
ISO/IEC 2021

---------------------- Page: 1 ----------------------
ISO/IEC 23090-17:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2021
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO/IEC 2021 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC 23090-17:2021(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 1
5 Reference software for ISO/IEC 23090-2 . 2
5.1 General . 2
5.2 Description . 2
5.3 Feature support list . 2
5.4 Reference software data structures mapping . 3
5.5 Usage of omaf_tool . 3
5.5.1 General. 3
5.5.2 Syntax for printing a description of parameters . 4
5.5.3 Packaging. 4
5.5.4 Parsing . 4
5.6 Copyright disclaimer for software modules . 4
6 Conformance for ISO/IEC 23090-2 . 5
6.1 General . 5
6.2 Description of conformance files . 5
Bibliography . 9
© ISO/IEC 2021 – All rights reserved PROOF/ÉPREUVE iii

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ISO/IEC 23090-17:2021(E)

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 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.
A list of all parts in the ISO/IEC 23090 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.
iv PROOF/ÉPREUVE © ISO/IEC 2021 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/IEC 23090-17:2021(E)

Introduction
The conformance and reference software in this document serves two main purposes:
— validation of the written specification of ISO/IEC 23090-2;
— conformance testing for checking interoperability for the various applications against the reference
software which aims to be compliant with ISO/IEC 23090-2.
© ISO/IEC 2021 – All rights reserved PROOF/ÉPREUVE v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO/IEC 23090-17:2021(E)
Information technology — Coded representation of
immersive media —
Part 17:
Reference software and conformance for omnidirectional
media format (OMAF)
1 Scope
This document specifies the conformance and reference software for omnidirectional media format
(specified in ISO/IEC 23090-2). This document describes the reference software modules and the
features that is supports. It also provides a description of how the reference software can be utilized.
In addition, the document lists and describes test vectors comprising ISO base media file format files,
media presentation descriptions, segments and combinations thereof that conform to ISO/IEC 23090-2.
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 23090-2, Information technology — Coded representation of immersive media — Part 2:
Omnidirectional media format
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 23090-2 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Abbreviated terms
2D two-dimensional
DASH MPEG dynamic adaptive streaming over HTTP (specified in ISO/IEC 23009-1)
HEVC high efficiency video coding
IDR instantaneous decoder refresh
ISOBMFF ISO base media file format (specified in ISO/IEC 14496-12)
© ISO/IEC 2021 – All rights reserved PROOF/ÉPREUVE 1

---------------------- Page: 6 ----------------------
ISO/IEC 23090-17:2021(E)

JSON JavaScript object notation
MPD media presentation description
OMAF omnidirectional media format
5 Reference software for ISO/IEC 23090-2
5.1 General
The reference software is available at: https:// standards .iso .org/ iso -iec/ 23090/ -17/ ed -1/ en/ .
5.2 Description
The OMAF reference software has two components: libomaf and omaf_tool. The libomaf library
provides an extension to MPEG’s ISOBMFF library (libisomediafile), described in ISO/IEC 14496-32,
by defining and implementing OMAF-related atoms and providing functions to create and parse these
atoms. The omaf_tool software uses libomaf and is able to parse and display OMAF metadata present in
an ISOBMFF container files.
Both libomaf and omaf_tool are implemented using the C/C++ language. The software uses the CMake
tool for managing the build process and enabling cross-platform compilation. The libomaf library can
also be used independently from the omaf_tool by including the omaf.h header file in the user’s code and
linking to the library.
5.3 Feature support list
Table 1 provides a complete list of features available in ISO/IEC 23090-2 and indicates which features
are currently supported by the reference software.
Table 1 — OMAF reference software feature support list
OMAF Support
Feature
Parsing Packaging
version
Restricted schemes for omnidirectional videos 1  
Projected omnidirectional video 1  
 
Equirectangular projected video 1
 
Packed equirectangular or cube map video 1
Fisheye omnidirectional video 1  
Region-wise packing information 1  
Rotation information 1  
Coverage information 1  
 
Region
...