Information technology — JPEG 2000 image coding system — Part 2: Extensions

This document defines a set of lossless (bit-preserving) and lossy compression methods for coding continuous-tone, bi-level, grey-scale, colour digital still images, or multi-component images. This document: – specifies extended decoding processes for converting compressed image data to reconstructed image data; – specifies an extended codestream syntax containing information for interpreting the compressed image data; – specifies an extended file format; – specifies a container to store image metadata; – defines a standard set of image metadata; – provides guidance on extended encoding processes for converting source image data to compressed image data; – provides guidance on how to implement these processes in practice.

Technologies de l'information — Système de codage d'images JPEG 2000 — Partie 2: Extensions

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ISO/IEC 15444-2:2023 - Information technology — JPEG 2000 image coding system — Part 2: Extensions Released:10. 11. 2023
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STANDARD 15444-2
Third edition
Information technology — JPEG 2000
image coding system —
Part 2:
Technologies de l'information — Système de codage d'images JPEG
2000 —
Partie 2: Extensions
Reference number
ISO/IEC 15444-2:2023(E)
© ISO/IEC 2023

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ISO/IEC 15444-2:2023(E)
© ISO/IEC 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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  © ISO/IEC 2023 – All rights reserved

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ISO/IEC 15444-2:2023(E)
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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.
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
received notice of (a) patent(s) which may be required to implement this document. However,
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see In the IEC, see
This document was prepared by ITU-T (as Rec. ITU-T T.801) 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 third edition cancels and replaces the second edition (ISO/IEC 15444-2:2021), which has been
technically revised.
The main changes are as follows:
— Support for progression order extensions.
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 and
© ISO/IEC 2023 – All rights reserved iii

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ISO/IEC 15444-2:2023 (E)
1 Scope . 1
2 Normative references . 1
3 Definitions . 2
4 Abbreviations . 4
5 Conventions . 4
6 General

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