Information technology — Multimedia application format (MPEG-A) — Part 22: Multi-image application format (MIAF)

This document specifies the Multi-Image Application Format (MIAF), which contains coded images, groups and sequences of images along with their metadata and the information about their relations to each other, all embedded in the High Efficiency Image File (HEIF) format. This document builds on ISO/IEC 23008-12 (HEIF) and specifies the following: — a set of additional constraints on ISO/IEC 23008-12 (HEIF), to simplify its file format options; — specific alpha plane formats; — a set of specific profiles and levels for the supported coding formats; — a set of specific metadata formats; — a set of brands, including application brands indicating conformance with specific profiles; — a set of rules for extending MIAF format to support additional coding formats, profiles, levels and metadata. This document also defines the normative behaviour for a MIAF reader and MIAF renderer. This document (MIAF) is intentionally written to be extensible, and to allow for forward compatibility. The format is also permissive of the presence of other data, such as coding formats, metadata, and derived images.

Technologies de l'information — Format pour application multimédia (MPEG-A) — Partie 22: Format pour application à images multiples (MIAF)

General Information

Status
Published
Publication Date
10-Feb-2025
Current Stage
6060 - International Standard published
Start Date
11-Feb-2025
Due Date
11-Feb-2025
Completion Date
11-Feb-2025
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ISO/IEC 23000-22:2025 - Information technology — Multimedia application format (MPEG-A) — Part 22: Multi-image application format (MIAF) Released:11. 02. 2025
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International
Standard
ISO/IEC 23000-22
Second edition
Information technology —
2025-02
Multimedia application format
(MPEG-A) —
Part 22:
Multi-image application format
(MIAF)
Technologies de l'information — Format pour application
multimédia (MPEG-A) —
Partie 22: Format pour application à images multiples (MIAF)
Reference number
© ISO/IEC 2025
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 2025 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 4
5 Document organization and conventions . 4
6 MIAF concepts and processing of MIAF files . 4
6.1 General .4
6.2 MIAF data object model .5
6.3 MIAF image items .5
6.4 MIAF thumbnail image items .5
6.5 MIAF auxiliary image item .5
6.6 MIAF reader processing model .6
6.7 MIAF renderer processing model .8
7 MIAF file general requirements . 9
7.1 General .9
7.2 Box-level requirements .9
7.2.1 Box-level requirements on image items .9
7.2.2 Box-level requirements on image sequences and video . 12
7.3 Item level requirements on image items . 12
7.3.1 General . 12
7.3.2 Primary item . 12
7.3.3 MIAF thumbnail images . 12
7.3.4 MIAF master image items that are not the primary item . 13
7.3.5 MIAF auxiliary image items . 13
7.3.6 Item properties .14
7.3.7 Content light level property .16
7.3.8 Mastering display colour volume property .16
7.3.9 Transformations and derived items .16
7.3.10 Metadata .16
7.3.11 Derived images and derived image items .17
7.3.12 Image grouping .19
7.4 Track-level requirements on image sequences and video . 20
7.4.1 General . 20
7.4.2 Track reference types . 20
7.4.3 Video track-level requirements . 20
7.4.4 Video track sample entry boxes . 20
7.4.5 Audio track-level requirements .21
7.4.6 Auxiliary video track-level requirements .21
7.5 Association of image items and tracks .21
7.6 Metadata .21
8 Shared conditions and requirements .22
8.1 General . 22
8.2 Self-containment . 22
8.2.1 Image items . 22
8.2.2 Image sequences and video . 22
8.3 Single-layer . 22
8.4 Grid-limit . . 22
8.5 Single-track . 22
8.6 Edit-lists . 22
8.7 Matched-duration . 23

© ISO/IEC 2025 – All rights reserved
iii
8.8 HDR signalling . 23
9 Profile-independent image item and sequence coding .24
10 Brands and file extensions .24
10.1 General .24
10.2 Progressive application brand .24
10.3 Animation application brand . 25
10.4 Burst capture application brand . 26
10.5 Fragmented alpha video brand . 26
10.6 Common media fragmented brand. 26
Annex A (normative) MIAF profiles .27
Annex B (Informative) Reference software and conformance .32
Bibliography .34

© ISO/IEC 2025 – All rights reserved
iv
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 diff
...

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