ISO/IEC 15444-16:2021

INTERNATIONAL ISO/IEC
STANDARD 15444-16
Second edition
2021-09
Information technology — JPEG 2000
image coding system —
Part 16:
Encapsulation of JPEG 2000 images
into ISO/IEC 23008-12
Reference number
©
ISO/IEC 2021
© ISO/IEC 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO/IEC 2021 – All rights reserved

Foreword
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Commission) form the specialized system for worldwide standardization. National bodies that are
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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
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see www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by ITU-T (as Rec. ITU-T T.815) and drafted in accordance with its editorial
rules, in collaboration with Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
This second edition cancels and replaces the first edition (ISO/IEC 15444-16:2019) which has been
technically revised.
The main changes compared to the previous edition are as follows:
‒ the encapsulation of Rec. ITU-T T.802 | ISO/IEC 15444-3 image sequences is deprecated, and
replaced by the encapsulation of Rec. ITU-T T.800 | ISO/IEC 15444-1 image sequences;
‒ adds support for quality and resolution layers;
‒ the syntax and semantics of the JPEG 2000 header item property are clarified; and
‒ reader conformance requirements are removed.
A list of all parts in the ISO/IEC 15444 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.
CONTENTS
..................................................................................................................................................................... Page
1 Scope . 1
2 Normative references . 1
2.1 Identical Recommendations | International Standards. 1
2.2 Paired Recommendations | International Standards equivalent in technical content . 1
2.3 Additional references . 1
3 Definitions. 1
3.1 Terms defined elsewhere . 1
3.2 Terms defined in this Recommendation | International Standard . 1
4 Abbreviations . 2
5 Conventions . 2
6 Encapsulation of Rec. ITU-T T.800 | ISO/IEC 15444-1 images and image collections . 2
6.1 General . 2
6.2 JPEG 2000 coded image item . 2
6.3 JPEG 2000 header item property . 2
6.4 JPEG 2000 layers box . 3
6.5 File conformance . 4
6.6 Media type . 4
6.7 Media type registration . 4
7 Encapsulation of Rec. ITU-T T.800 | ISO/IEC 15444-1 sequences . 5
7.1 General . 5
7.2 JPEG 2000 image sequence . 5
7.3 JPEG 2000 visual sample entry . 6
7.4 JPEG 2000 prefix . 6
7.5 JPEG 2000 header info . 6
7.6 File conformance . 6
7.7 Media type . 7
7.8 Media type registration . 7
8 Encapsulation of Rec. ITU-T T.802 | ISO/IEC 15444-3 image sequences (informative) . 8
Bibliography . 9
Rec. ITU-T T.815 (06/2021) iii
© ISO/IEC 2021 – All rights reserved

INTERNATIONAL STANDARD ISO/IEC 15444-16
RECOMMENDATION ITU-T T.815
Information technology – JPEG 2000 image coding system –
Encapsulation of JPEG 2000 images into ISO/IEC 23008-12
1 Scope
This Recommendation | International Standard specifies the encapsulation of image formats specified in the JPEG 2000
family of Recommendations | International Standards in the framework defined in ISO/IEC 23008-12.
2 Normative references
The following Recommendations and International Standards contain provisions which, through reference in this text,
constitute provisions of this Recommendation | International Standard. For dated references, only the edition cited
applies. For undated references, the latest edition of the referenced document (including any amendments) applies. At
the time of publication, the editions indicated in dated references were valid. All Recommendations and Standards are
subject to revision, and parties to agreements based on this Recommendation | International Standard are encouraged to
investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below.
Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication
Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations.
2.1 Identical Recommendations | International Standards
– Recommendation ITU-T T.800 (latest) | ISO/IEC 15444-1: (latest), Information technology – JPEG 2000
image coding system – Core coding system.
2.2 Paired Recommendations | International Standards equivalent in technical content
None.
2.3 Additional references
– ISO/IEC 23008-12:2017, Information technology – High efficiency coding and media delivery in
heterogeneous environments – Part12: Image file format.
3 Definitions
3.1 Terms defined elsewhere
This Recommendation | International Standard uses the following terms defined elsewhere:
For the purposes of this Recommendation | International Standard, the definitions given in ISO/IEC 23008-12 apply.
ITU, ISO and IEC maintain terminological databases for use in standardization at the following addresses:
– ITU terminology database: https://www.itu.int/go/terms
– ISO online browsing platform: https://www.iso.org/obp
– IEC Electropedia: http://www.electropedia.org/
3.2 Terms defined in this Recommendation | International Standard
This Recommendation | International Standard defines the following terms:
None.
Rec. ITU-T T.815 (06/2021) 1
© ISO/IEC 2021 – All rights reserved

4 Abbreviations
For the purposes of this Recommendation | International Standard, the following abbreviations apply:
JPEG Joint Photographic Experts Group
5 Conventions
None.
6 Encapsulation of Rec. ITU-T T.800 | ISO/IEC 15444-1 images and image collections
6.1 General
This clause specifies the encapsulation of individual JPEG 2000 codestreams, as specified in Rec. ITU-T T.800 |
ISO/IEC 15444-1, as individual images or as image collections as specified in ISO/IEC 23008-12.
6.2 JPEG 2000 coded image item
A JPEG 2000 coded image item is a coded image item, as defined in ISO/IEC 23008-12, with type 'j2k1' that
conforms to the provisions of this subclause.
The body of the coded image item shall be exactly one Contiguous Codestream box as specified in Rec. ITU-T T.800 |
ISO/IEC 15444-1.
NOTE 1 – The JPEG 2000 codestream contained in the Contiguous Codestream box can require capabilities not defined in
Rec. ITU-T T.800 | ISO/IEC 15444-1, including those specified in Rec. ITU-T T.814 | ISO/IEC 15444-15. Such required
capabilities are signalled in the CAP Marker Segment specified in Rec. ITU-T T.800 | ISO/IEC 15444-1.
The coded image item shall be associated with exactly one JPEG 2000 header item property specified in 6.3, and the
essential field of the item property shall be equal to 1.
The coded image item shall be associated with exactly one 'colr' item property, and the essential field of that item
property shall be equal to 1.
i
If a 'pixi' item property is associated with the coded image item, its information shall be consistent with the Ssiz
fields of the SIZ marker of the JPEG 2000 codestream within the Contiguous Codestream box.
If a 'lsel' item property is associated with the coded image item,
...