ISO/IEC 18181-4:2022

INTERNATIONAL ISO/IEC
STANDARD 18181-4
First edition
2022-08
Information technology — JPEG XL
image coding system —
Part 4:
Reference software
Technologies de l'information — Systѐme de codage d'images JPEG
XL —
Partie 4: Logiciel de référence
Reference number
ISO/IEC 18181-4:2022(E)
© ISO/IEC 2022

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ISO/IEC 18181-4:2022(E)
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  © ISO/IEC 2022 – All rights reserved

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ISO/IEC 18181-4:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reference software . 1
4.1 General . 1
4.2 Examples of use . 2
4.3 Access. 2
4.4 Dependencies . 3
5 Usage instructions . 3
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ISO/IEC 18181-4:2022(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
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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
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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 18181 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.
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INTERNATIONAL STANDARD ISO/IEC 18181-4:2022(E)
Information technology — JPEG XL image coding system —
Part 4:
Reference software
1 Scope
This document provides reference implementations of ISO/IEC 18181-1 and ISO/IEC 18181-2. The
software supports lossless and lossy compression of images and image sequences for a wide range
of use cases such as (
...