ISO/IEC 21122-2:2022/PRF Amd 1

Information technology — JPEG XS low-latency lightweight image coding system — Part 2: Profiles and buffer models — Amendment 1: Profile and sublevel for 4:2:0 content

Technologies de l'information — Système de codage d'images léger à faible latence JPEG XS — Partie 2: Profils et modèles tampons — Amendement 1: Titre manque

General Information

• Status: Not Published
• 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 - Coding of audio, picture, multimedia and hypermedia information
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Completion Date: 21-Sep-2022

RELATIONS

• Amends: ISO/IEC 21122-2:2022 - Information technology — JPEG XS low-latency lightweight image coding system — Part 2: Profiles and buffer models
• Effective Date: 06-Jun-2022

Standards Content (sample)

INTERNATIONAL ISO/IEC
STANDARD 21122-2
Second edition
2022-03
AMENDMENT 1
Information technology — JPEG XS
low-latency lightweight image coding
system —
Part 2:
Profiles and buffer models
AMENDMENT 1: Profile and sublevel for
4:2:0 content
PROOF/ÉPREUVE
Reference number
ISO/IEC 21122-2/Amd. 1:2022(E)
© ISO/IEC 2022
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ISO/IEC 21122-2/Amd. 1:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2022

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]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE  © ISO/IEC 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC 21122-2/Amd. 1:2022(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. This document was drafted in

accordance with the editorial rules of the ISO/IEC Directives, Part 2 (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 https://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 Joint Technical Committee ISO/IEC JTC 1, Information technology

Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.

A list of all parts in the ISO/IEC 21122 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.
iii
© ISO/IEC 2022 – All rights reserved  PROOF/ÉPREUVE
---------------------- Page: 3 ----------------------
ISO/IEC 21122-2/Amd. 1:2022(E)
Information technology — JPEG XS low-latency lightweight
image coding system —
Part 2:
Profiles and buffer models
AMENDMENT 1: Profile and sublevel for 4:2:0 content
A.2.1, Table A.3
Replace the table with the following table:
Table A.3 — JPEG XS High profiles
Profile High High High
420.12 444.12 4444.12
Number N of smoothing buffer units of the decoder 16 16 16
sbu
model
Smoothing buffer offset S in bits 1 024 1 024 1 024
sbo
Component bit precision (B[i]) 8, 10, 12 8, 10, 12 8, 10, 12
Internal precision (Bw) 20 20 20
# fractional bits for DWT coefficients (Fq) 8 8 8
Non-linear transform Disallowed Disallowed Disallowed
Raw-mode selection per packet flag (Rl) 0 0 0
Chroma sampling formats 4:2:0 4:0:0 4:0:0
4:2:2 4:2:2
4:4:4 4:4:4
4:2:2:4
4:4:4:4
Colour transformation 0 (None) 0 (None) for 0 (None) for
any sampling  any sampling
format, or  format, or
optionally optionally
1 (RCT) for  1 (RCT) for
4:4:4 4:4:4 and
4:4:4:4
Number of vertical decompositions 1, 2 0, 1, 2 0, 1, 2
Number of horizontal decompositions [1-5] [1-5] [1-5]
Number components with suppressed decomposition 0 0 0
...

ISO/IEC JTC 1/SC 29/WG1 N100249
Online, July 25-29, 2022
ISO/IEC JTC 1/SC 29/WG 1
(& ITU-T SG16)
Coding of Still Pictures
JBIG JPEG
Joint Bi-level Image Joint Photographic
Experts Group Experts Group
TITLE: ISO/IEC 21122-2 2ED :2022/AMD1 “Profile and sublevel for 4:2:0 content”
SOURCE: JTC 1/SC 29/WG 1
PROJECT: ISO/IEC 21122-2 2ED
STATUS: Publication
© ISO 2022 – All rights reserved
---------------------- Page: 1 ----------------------
ISO #####-#:####(X)
REQUESTED
ACTION:
DISTRIBUTION: SC 29
Contact:
ISO/IEC JTC 1/SC 29/WG1 Convener – Prof. Touradj Ebrahimi
EPFL/STI/IEL/GR-EB, Station 11, CH-1015 Lausanne, Switzerland
Tel: [phone], Fax: [phone], E-mail: [e-mail]
2 © ISO #### – All rights reserved
---------------------- Page: 2 ----------------------
ISO 21122-2:2022/AMD1(E)
ISO SC 29/WG 1
Date: 2022-01-2110

Information technology – JPEG XS low-latency lightweight image coding system – Part 2: Profiles

and buffer models
AMENDMENT 1: Profile and sublevel for 4:2:0 content
AMENDMENT 1: Profile and sublevel for 4:2:0 content
DAMD stage
Warning for WDs and CDs

This document is not an ISO International Standard. It is distributed for review and comment. It is subject to

change without notice and may not be referred to as an International Standard.

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 supporting documentation.

A model manuscript of a draft International Standard (known as “The Rice Model”) is available at

https://www.iso.org/iso/model_document-rice_model.pdf
© ISO 2022 – All rights reserved
---------------------- Page: 3 ----------------------
© ISO 20XX
---------------------- Page: 4 ----------------------
ISO/IEC 21122-2/Amd. 1:2022/AMD1(E)
© ISO 2022

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]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 2022 – All rights reserved
ii © ISO/IEC 2022 – All rights reserved
---------------------- Page: 5 ----------------------
ISO/IEC 21122-2/Amd. 1:2022/AMD1(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. This document was drafted in accordance with the editorial

rules of the ISO/IEC Directives, Part 2 (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 https://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 Joint Technical Committee ISO/IEC JTC 1, Information technology

Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.

A list of all parts in the ISO/IEC 21122 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 2022 – All rights reserved iii
© ISO/IEC 2022 – All rights reserved iii
---------------------- Page: 6 ----------------------
ISO/IEC 21122-2/Amd. 1:2022(E)
Information technology – JPEG XS low-latency lightweight image
coding system –
Part 2:
Profiles and buffer models
AMENDMENT 1: Profile and sublevel for 4:2:0 content
Part 2:
Profiles and buffer models
AMENDMENT 1: Profile and sublevel for 4:2:0 content
A.2.1, Table A.3
Replace the table with the following table:
Table A.3 — JPEG XS High profiles
Profile High High High
420.12 444.12 4444.12
Number Nsbu of smoothing buffer units of the decoder 16 16 16
model
Smoothing buffer offset Ssbo in bits 1 024 1 024 1 024
Component bit preci
...