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)

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Status
Published
Publication Date
21-Oct-2021
Current Stage
6060 - International Standard published
Start Date
22-Oct-2021
Completion Date
22-Oct-2021
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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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© 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

iii
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 3 ----------------------
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.
© 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
---------------------- 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 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
© ISO/IEC 2021 – All rights reserved
---------------------- Page: 6 ----------------------
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: +41 22 749 01 11
Email: copyright@iso.org
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
---------------------- Page: 3 ----------------------
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
...

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