ISO/IEC 15444-4:2024

International
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 2024
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© ISO/IEC 2024 – All rights reserved
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Foreword
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In the IEC, see www.iec.ch/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
iii
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
CONTENTS
Page
1 Scope . 1
2 References . 1
3 Definitions . 1
4 Abbreviations and symbols . 4
4.1 Abbreviations . 4
4.2 Symbols . 5
5 Conventions . 6
6 General description . 6
6.1 Profiles, derived sets and compliance classes . 7
6.2 Decoders . 8
6.3 Encoders and codestreams . 8
6.4 Implementation compliance statement . 8
6.5 Abstract test suites . 8
6.6 Encoder compliance testing procedure . 9
6.7 Decoder compliance testing procedure . 9
6.8 Procedures for testing file format readers . 9
6.9 Additional test codestreams and files . 9
7 Copyright . 9
8 Compliance files availability and updates . 9
Annex A Decoder compliance classes . 10
A.1 Compliance class parameter definitions . 10
A.1.1 Profile: codestream guarantees . 10
A.1.2 H, W, C: Image size guarantees . 10
A.1.3 N : Code-block parsing guarantee . 11
cb
A.1.4 N : Component parsing guarantee . 11
comp
A.1.5 L : Coded data buffering guarantee . 11
body
A.1.6 M: Decoded bit-plane guarantee . 12
A.1.7 P: 9-7I precision guarantee . 12
A.1.8 B: 5-3R precision guarantee . 12
A.1.9 T : Transform level guarantee . 12
L
A.1.10 L: Layer guarantee. 12
A.1.11 Progressions . 12
A.1.12 Tile-parts . 12
A.1.13 Precincts . 13
A.1.14 M : Magnitude bound guarantee . 13
MAGB
A.2 Compliance class definitions . 13
A.3 Lossless encoding and decoding . 14
Annex B Decoder compliance testing procedures . 15
B.1 General . 15
B.2 Decoder test procedure . 15
B.2.1 Files for testing . 16
B.2.2 Decoder settings . 16
B.2.3 Output file format conversion . 16
B.2.4 Compare decoded and formatted components with reference components . 18
B.2.5 Compare error metrics with specification . 18
B.2.6 Reference components file format . 18
Annex C Compliance tests . 20
C.1 Abstract test suite (informative) . 20
C.1.1 Syntax and compressed data order . 20
C.1.2 Arithmetic entropy encoding . 20
C.1.3 Coefficient bit modelling . 21
C.1.4 Quantization . 21
C.1.5 Discrete wavelet transform. 21
C.1.6 DC level shift and multiple component transform . 21
Rec. ITU-T T.803 (V3) (02/2024) v
© ISO/IEC 2024 – All rights reserved

C.1.7 Region of interest . 21
C.1.8 JP2 file format . 21
C.1.9 High throughput cleanup pass coding . 22
C.1.10 HT refinement pass coding . 22
C.1.11 Placeholder passes . 22
C.1.12 Mixing of HT and J2K code-blocks within HTJ2K codestreams . 22
C.1.13 JPH File format . 22
C.2 Executable test suite . 22
C.2.1 Class 0 Profile-0 . 23
C.2.2 Class 0 Profile-1 . 27
C.2.3 Class 1 Profile-0 . 28
C.2.4 Class 1 Profile-1 . 30
C.2.5 Class 1HF Profile 1 .
...