|
Standard
ISO/IEC 15444-4
Information technology — JPEG
Fourth edition
2000 image coding system —
2024-05
Part 4:
Conformance testing
Technologies de l'information — Système de codage d'images
JPEG 2000 —
Partie 4: Tests de conformité
Reference number
ISO/IEC 15444-4:2024(en) © ISO/IEC 2024
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ISO/IEC 15444-4:2024(en)
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© ISO/IEC 2024 – All rights reserved
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ISO/IEC 15444-4:2024(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
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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 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.803) 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 fourth edition cancels and replaces the third edition (ISO/IEC 15444-4:2021), which has been technically
revised.
The main changes are as follows:
— the maximum allowable errors associated with compliance Class 1, for both Rec. ITU-T T.800 | ISO/IEC
15444-1 and Rec. ITU-T T.814 | ISO/IEC 15444-15 codestreams, have been relaxed in a few cases to
ensure that well designed 16-bit fixed-point implementations of the inverse discrete wavelet transform
should be able to pass all compliance tests for Class 1;
— two additional test codestreams have been added along with conformance bounds, to facilitate testing of
inverse wavelet and component decorrelating transform accuracy;
— a number of codestreams and files conforming to Rec. ITU-T T.801 | ISO/IEC 15444-2 have been included
for informative purposes only, to facilitate the development of decoders and file format readers that are
able to support features beyond the core capabilities found in Rec. ITU-T T.800 | ISO/IEC 15444-1 and
Rec. ITU-T T.814 | ISO/IEC 15444-15.
A list of all parts in the ISO/IEC 15444 series can be found on the ISO and IEC websites.
© ISO/IEC 2024 – All rights reserved
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ISO/IEC 15444-4:2024(en)
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.
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