ISO/IEC TR 19566-9:2024
(Main)Information technology — JPEG Systems — Part 9: JPEG extensions mechanisms to facilitate forwards and backwards compatibility
Information technology — JPEG Systems — Part 9: JPEG extensions mechanisms to facilitate forwards and backwards compatibility
This document summarizes mechanisms by which existing file formats and codestreams, such as those specified in ISO/IEC TR 19566-1, can be extended in a forward and backward-compatible way.
Technologies de l'information — Systèmes JPEG — Partie 9: Mécanismes d'extension JPEG pour faciliter la compatibilité ascendante et descendante
General Information
Standards Content (Sample)
Technical
Report
ISO/IEC TR 19566-9
First edition
Information technology — JPEG
2024-08
Systems —
Part 9:
JPEG extensions mechanisms to
facilitate forwards and backwards
compatibility
Technologies de l'information — Systèmes JPEG —
Partie 9: Mécanismes d'extension JPEG pour faciliter la
compatibilité ascendante et descendante
Reference number
© ISO/IEC 2024
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© ISO/IEC 2024 – All rights reserved
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, and abbreviated terms . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms .2
4 Conventions - Operators . 2
4.1 Arithmetic operators .3
4.2 Logical operators .3
4.3 Relational operators .3
4.4 Precedence order of operators .3
4.5 Mathematical functions .4
5 General extensions mechanisms . 4
5.1 General .4
5.2 Extensions mechanisms for codestreams .4
5.3 Extension mechanisms for file formats.6
5.4 File Type box .7
5.5 JPEG Universal Metadata Box Format (JUMBF) .8
5.6 Compressed boxes .8
6 Extension mechanisms for ITU Recommendation T.81 | ISO/IEC 10918-1 (JPEG 1) . 9
6.1 Application markers .9
6.2 APP11 based extensions .9
6.3 JUMBF Boxes .10
7 Extension mechanisms for Rec. ITU-T T.800 | ISO/IEC 15444 (JPEG 2000) series .10
7.1 General .10
7.2 CAP marker . .11
7.3 Profile indicators .11
7.4 COD marker . 12
7.5 File Type Box . 12
7.6 Reader Requirements Box . 12
8 Extension mechanisms for the ISO/IEC 21122 series (JPEG XS) .13
8.1 General . 13
8.2 CAP marker . . 13
8.3 Marker allocation .14
8.4 Profile, level and sublevel indicators .14
8.5 File format . 15
9 Extension mechanisms for ISO/IEC 18181 (JPEG XL) .15
9.1 General . 15
9.2 Codestream extensions . 15
9.3 New component types . 15
9.4 File Type Box .16
Bibliography . 17
© ISO/IEC 2024 – 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 or www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had not
received notice of (a) patent(s) which may be required to implement this document. However, implementers
are cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held
responsible for identifying any or all such patent rights.
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 19566 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 2024 – All rights reserved
iv
Introduction
This document collects guiding principles on how standards discussed in ISO/IEC TR 19566-1 provide
mechanisms for forwards compatibility, so called extension mechanisms, both on the basis of the codestream
and the file format and lists specific implementations of these guiding principles in particular standards.
The purpose of this document is to provide documentation on these principles for the preparation of future
extensions of these standards, and to ensure consistency of extension principles amongst standards.
© ISO/IEC 2024 – All rights reserved
v
Technical Report ISO/IEC TR 19566-9:2024(en)
Information technology — JPEG Systems —
Part 9:
JPEG extensions mechanisms to facilitate forwards and
backwards compatibility
1 Scope
This document summarizes mechanisms by which existing file formats and codestreams, such as those
specified in ISO/IEC TR 19566-1, can be extended in a forward and backward-compatible way.
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.
Rec. ITU-T T.800 | ISO/IEC 15444-1, Information technology — JPEG 2000 image coding system — Part 1: Core
coding system
Rec. ITU-T T.801 | ISO/IEC 15444-2, Information technology — JPEG 2000 image coding system — Part 2:
Extensions
Rec. ITU-T T.802 | ISO/IEC 15444-3, Information technology — JPEG 2000 image coding system — Part 3:
Motion JPEG 2000
ISO/IEC 18181-1, Information technology — JPEG XL image coding system — Part 1: Core coding system
ISO/IEC TR 19566-1, Information technology — JPEG Systems — Part 1: Packaging of information using
codestreams and f
...
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