ISO/IEC 10918-7:2021

Information technology — Digital compression and coding of continuous-tone still images — Part 7: Reference software

This document provides reference software for the coding technology specified in Recommendation ITU-T T.81 | ISO/IEC 10918-1. While the reference implementations also provide an encoder, conformance testing of their encoding process is beyond the scope of this document.

Technologies de l'information — Compression numérique et codage des images fixes à modelé continu — Partie 7: Logiciel de référence

General Information

• Status: Withdrawn
• Publication Date: 14-Sep-2021
• 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: 03-Nov-2023

Relations

• Revised: ISO/IEC 10918-7:2023 - Information technology — Digital compression and coding of continuous-tone still images — Part 7: Reference software
• Effective Date: 24-Sep-2022
• Revises: ISO/IEC 10918-7:2019 - Information technology — Digital compression and coding of continuous-tone still images — Part 7: Reference software
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 10918-7
Second edition
2021-09
Information technology — Digital
compression and coding of
continuous-tone still images —
Part 7:
Reference software
Technologies de l'information — Compression numérique et codage
des images fixes à modelé continu —
Partie 7: Logiciel de référence
Reference number
ISO/IEC 10918-7:2021(E)
©
ISO/IEC 2021

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ISO/IEC 10918-7:2021(E)

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ii © ISO/IEC 2021 – All rights reserved

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ISO/IEC 10918-7:2021(E)
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 and non-governmental, in
liaison with ISO and IEC, also take part in the work.
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 (see www.iso.org/
directives or www.iec.ch/members_experts/refdocs).
Attention is drawn to the possibility that some of the elements of this document may be the subject
of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
Details of any patent rights identified during the development of the document will be in the Introduction
and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC list
of patent declarations received (see patents.iec.ch).
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 www.iec.ch/understanding-standards.
This document was prepared by ITU-T as Rec. ITU-T T.873 (06/2021) 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 second edition cancels and replaces the first edition (ISO/IEC 10918-7:2019), which has been
technically revised.
The main changes compared to the previous edition are as follows:
   ‒  the reference software implementations are updated to version 1.58 for reference software 1, and
      to version 2.0.5 for reference software 2. These versions do not include any new features, they
      correct implementation errors and improve the overall stability of the software.
A list of all parts in the ISO/IEC 10918 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 www.iso.org/members.html and www.iec.ch/
national-committees.
© ISO/IEC 2021 – All rights reserved iii

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ISO/IEC 10918-7:2021 (E)
CONTENTS
Page
1 Scope . 1
2 Normative references . 1
3 Definitions. 1
4 Abbreviations .
...