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Standard
ISO/IEC 10918-4
Second edition
Information technology — Digital
2024-05
compression and coding of
continuous-tone still images —
Part 4:
APPn markers
Technologies de l'information — Compression numérique et
codage des images fixes à modelé continu —
Partie 4: Marqueurs APPn
Reference number
ISO/IEC 10918-4:2024(en) © ISO/IEC 2024
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ISO/IEC 10918-4:2024(en)
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© ISO/IEC 2024
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© ISO/IEC 2024 – All rights reserved
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ISO/IEC 10918-4:2024(en)
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.
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 /understanding-standards.
This document was prepared by ITU-T (as ITU-T Rec T.86) 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 10918-4:1999), which has been technically
revised. It also incorporates the Amendment ISO/IEC 10918-4:1999/Amd 1:2013.
The main changes are as follows:
— cancels the provisions concerning the registration authority processes originally defined in the first
edition.
A list of all parts in the ISO/IEC 10918 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 /national-
committees.
© ISO/IEC 2024 – All rights reserved
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ISO/IEC 10918-4:2024(en)
CONTENTS
Page
1 Scope . 1
2 Normative references . 1
2.1 Identical ITU-T Recommendations | International Standards . 1
3 Definitions . 1
4
...