ISO/IEC 18477-1:2020

Information technology — Scalable compression and coding of continuous-tone still images — Part 1: Core coding system specification

This document specifies a coding format, referred to as JPEG XT, which is designed primarily for continuous-tone photographic content. This document defines the core coding system, which forms the basis for the entire ISO/IEC 18477 series.

Technologies de l'information — Compression échelonnable et codage d'images plates en ton continu — Partie 1: Spécification du système de codage de noyau

General Information

• Status: Withdrawn
• Publication Date: 28-May-2020
• ICS: 35.040.30 - Coding of graphical and photographical information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29/WG 1 - JPEG Coding of digital representations of images
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 31-May-2024

Relations

• Revised: ISO/IEC 18477-1:2024 - Information technology — Scalable compression and coding of continuous-tone still images — Part 1: Core coding system specification
• Effective Date: 18-Feb-2023
• Revises: ISO/IEC 18477-1:2015 - Information technology — Scalable compression and coding of continuous-tone still images — Part 1: Scalable compression and coding of continuous-tone still images
• Effective Date: 23-Apr-2020

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/IEC
DRAFT
STANDARD FDIS
18477-1
ISO/IEC JTC 1/SC 29
Information technology — Scalable
Secretariat: JISC
compression and coding of
Voting begins on:
2020-03-13 continuous-tone still images —
Voting terminates on:
Part 1:
2020-05-08
Core coding system specification
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/IEC FDIS 18477-1:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO/IEC 2020

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ISO/IEC FDIS 18477-1:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2020
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved

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ISO/IEC FDIS 18477-1:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
4.1 Symbols . 3
4.2 Abbreviated terms . 3
5 Conventions . 3
5.1 Conformance language . 3
5.2 Operators . 4
5.2.1 Arithmetic operators . 4
5.2.2 Assignment operators . 4
5.2.3 Precedence order of operators . 4
5.2.4 Mathematical functions . 4
6 General .
...

INTERNATIONAL ISO/IEC
STANDARD 18477-1
Second edition
2020-05
Information technology — Scalable
compression and coding of
continuous-tone still images —
Part 1:
Core coding system specification
Technologies de l'information — Compression échelonnable et codage
d'images plates en ton continu —
Partie 1: Spécification du système de codage de noyau
Reference number
ISO/IEC 18477-1:2020(E)
©
ISO/IEC 2020

---------------------- Page: 1 ----------------------
ISO/IEC 18477-1:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2020
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC 18477-1:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
4.1 Symbols . 3
4.2 Abbreviated terms . 3
5 Conventions . 3
5.1 Conformance language . 3
5.2 Operators . 4
5.2.1 Arithmetic operators . 4
5.2.2 Assignment operators . 4
5.2.3 Precedence order of operators . 4
5.2.4 Mathematical functions . 4
6 General . 4
6.1 General definitions . 4
6.2 Functional overview on the decoding process . 5
6.3 Encoder requirements .
...