ISO/IEC FDIS 18181-1
(Main)Information technology — JPEG XL image coding system — Part 1: Core coding system
Information technology — JPEG XL image coding system — Part 1: Core coding system
This document defines a set of compression methods for coding one or more images of bi-level, continuous-tone greyscale, or continuous-tone colour, or multichannel digital samples. This document: — specifies decoding processes for converting compressed image data to reconstructed image data; — specifies a codestream syntax containing information for interpreting the compressed image data; — provides guidance on encoding processes for converting source image data to compressed image data.
Technologies de l'information — Systѐme de codage d'images JPEG XL — Partie 1: Système de codage de noyau
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International
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ISO/IEC
FDIS
18181-1
ISO/IEC JTC 1/SC 29
Information technology — JPEG XL
Secretariat: JISC
image coding system —
Voting begins on:
2024-03-07
Part 1:
Core coding system
Voting terminates on:
2024-05-02
Technologies de l'information — Systѐme de codage d'images
JPEG XL —
Partie 1: Système de codage de noyau
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Reference number
ISO/IEC FDIS 181811:2024(en) © ISO/IEC 2024
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FINAL DRAFT
ISO/IEC FDIS 18181-1:2024(en)
International
Standard
ISO/IEC
FDIS
18181-1
ISO/IEC JTC 1/SC 29
Information technology — JPEG XL
Secretariat: JISC
image coding system —
Voting begins on:
Part 1:
Core coding system
Voting terminates on:
Technologies de l'information — Systѐme de codage d'images
JPEG XL —
Partie 1: Système de codage de noyau
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO/IEC 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/IEC FDIS 181811:2024(en) © ISO/IEC 2024
© ISO/IEC 2024 – All rights reserved
ii
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ISO/IEC FDIS 18181-1:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions .1
3.2 Inputs .2
3.3 Processes .3
3.4 Image and codestream organization .4
3.5 Abbreviated terms .5
4 Conventions . 5
4.1 Mathematical symbols .
...
Reference number of working document: ISO/IEC FDIS 18181-1
ISO/IEC JTC 1/SC 29/WG 1 N100646
Date: 2023-11-03
Reference number of project: ISO/IEC/FDIS 18181-1
Committee identification: ISO/JTC 1/SC 29/WG 1
Secretariat: JISC
Date: 2024-02-21
Information technology — JPEG XL image coding system — —
Part 1:
Core coding system
Technologies de l’information l'information — Systѐme de codage d’imagesd'images JPEG XL — —
Partie 1: Système de codage de noyau
FDIS stage
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ISO/IEC/DIS FDIS 18181-1:2023(E2024(en)
© ISO/IEC 20232024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.org www.iso.org
Published in Switzerland
ii © ISO/IEC 2023 2024 – All rights reserved
ii
---------------------- Page: 2 ----------------------
ISO/IEC/DIS FDIS 18181-1:2023(E2024(en)
Contents
Foreword . v
1 Scope .1
2 Normative references .1
3 Terms, definitions and abbreviated terms .2
3.1 Terms and definitions .2
3.2 Inputs .2
3.3 Processes .4
3.4 Image and codestream organization .5
3.5 Abbreviated terms .6
4 Conventions .6
4.1 Mathematical symbols .6
4.2 Functions .6
4.3 Operators .7
4.4 Pseudocode .8
5 Functional concepts .8
5.1 Image organization .8
5.2 Mirroring .9
5.3 Group splitting .
...
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