ISO/IEC 10918-4:1999

INTERNATIONAL ISO/IEC
STANDARD 10918-4
First edition
1999-08-15
Information technology — Digital
compression and coding of
continuous-tone still images: Registration
of JPEG profiles, SPIFF profiles, SPIFF
tags, SPIFF colour spaces, APPn markers,
SPIFF compression types and
Registration Authorities (REGAUT)
Technologies de l’information — Compression numérique et codage
des images fixes de nature photographique: Enregistrement des profils
JPEG, profils SPIFF, «SPIFF tags», espaces de couleur SPIFF,
marqueurs APPn, types de compression SPIFF et autorités
d’enregistrement (REGAUT)
Reference number
©
ISO/IEC 1999
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO/IEC 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 734 10 79
E-mail copyright@iso.ch
Web www.iso.ch
Printed in Switzerland
ii © ISO/IEC 1999 – All rights reserved

Contents
Page
1 Scope . 1
2 Normative references. 1
2.1 Identical ITU-T Recommendations | International Standards . 1
2.2 Additional references . 2
3 Definitions, abbreviations, and symbols. 2
3.1 Definitions. 2
3.2 Abbreviations and acronyms . 3
3.3 Symbols. 3
4 General . 3
4.1 JPEG and SPIFF profiles (see ITU-T Rec. T.84 | ISO/IEC 10918-3, F.2.1). 3
4.1.1 Purpose of a profile . 4
4.1.2 Criteria for acceptance of a profile. 4
4.1.3 Contents of the submission. 4
4.1.4 Normative section. 4
4.2 SPIFF tags (see ITU-T Rec. T.84 | ISO/IEC 10918-3, F.2.2) . 5
4.2.1 Purpose of a SPIFF tag. 5
4.2.2 Criteria. 5
4.2.3 Contents of the submission. 5
4.3 SPIFF colour space (see ITU-T Rec. T.84 | ISO/IEC 10918-3, F.2.1.1). 5
4.3.1 Purpose of a SPIFF colour space. 5
4.3.2 Criteria. 5
4.3.3 Contents of the submission. 6
4.4 APPn marker (see CCITT Rec. T.81 | ISO/IEC 10918-1, B.2.4.6). 6
4.4.1 Purpose of an APPn marker . 6
4.4.2 Criteria. 6
4.4.3 Contents of the submission. 6
4.5 SPIFF compression type (see ITU-T Rec. T.84 | ISO/IEC 10918-3, F.2.1). 7
4.5.1 Purpose of SPIFF compression type registration . 7
4.5.2 Criteria. 7
4.5.3 Contents of the submission. 7
4.6 Registration Authority (see ITU-T Rec. T.84 | ISO/IEC 10918-3, F.2.3.2.13) . 7
4.6.1 Purpose of Image Registration Authority (REGAUT) IDs . 8
4.6.2 Criteria. 8
4.6.3 Contents of the submission. 8
5 Submission, review, and appeal process. 9
5.1 Submission process . 9
5.2 Review process. 9
5.3 Notification and appeal process . 10
Annex A – JPEG marker and SPIFF tag usage tables . 12
Annex B – Examples of registered PTSMCR items . 14
B.1 Example of a JPEG profile: NITFS Lossless JPEG Profile . 14
B.1.1 Normative description . 14
B.1.2 Informative description . 23
B.2 Example of SPIFF tag . 24
B.2.1 Normative description . 24
B.2.2 Origin of request. 24
B.2.3 Typical application. 24
B.2.4 Content . 24
B.3 Example of a SPIFF colour space . 24
B.3.1 Origin of request. 24
B.3.2 Typical application. 24
iii
© ISO/IEC 1999 – All rights reserved

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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO/IEC 10918 may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
International Standard ISO/IEC 10918-4 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information
technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information,in
collaboration with ITU-T. The identical text is published as ITU-T Recommendation T.86.
ISO/IEC 10918 consists of the following parts, under the general title Information technology — Digital compression
and coding of continuous-tone still images:
� Part 1: Requirements and guidelines
� Part 2: Compliance testing
� Part 3: Extensions
� Part 4: Registration of JPEG profiles, SPIFF profiles, SPIFF tags, SPIFF colour spaces, APPn markers, SPIFF
compression types and Registration Authorities (REGAUT)
� Part 5: MHEG subset for base level implementation
Annexes A to C of this part of ISO/IEC 10918 are for information only.
Please note that the following definitions were omitted in subclause 3.2 “Abbreviations and Acronyms”:
JBIG Joint Bi-level Image experts Group
JPEG Joint Photographic Experts Group
PTSMCR Profiles, Tags, colour Spaces, Markers, Compression type and REGAUT
REGAUT REGistration AUThority
SPIFF Still Picture Interchange File Format
© ISO/IEC 1999 – All rights reserved v

ISO/IEC 10918-4 : 1999 (E)
INTERNATIONAL STANDARD
ISO/IEC 10918-4 : 1998 (E)
ITU-T Rec. T.86 (1998 E)
ITU-T RECOMMENDATION
INFORMATION TECHNOLOGY – DIGITAL COMPRESSION AND
CODING OF CONTINUOUS-TONE STILL IMAGES: REGISTRATION OF
JPEG PROFILES, SPIFF PROFILES, SPIFF TAGS, SPIFF COLOUR SPACES,
APPn MARKERS, SPIFF COMPRESSION TYPES AND
REGISTRATION AUTHORITIES (REGAUT)
1 Scope
This Recommendation | International Standard provides for the unique registration of JPEG and SPIFF Profiles,
SPIFF Tags, SPIFF colour Spaces, application specific Markers, SPIFF Compression types and images Registration
authorities as defined in the CCITT Rec. T.81 | ISO/IEC 10918-1 and ITU-T Rec. T.84 | ISO/IEC 10918-3. Unless
otherwise specified, (P)rofiles, (T)ags, colour (S)paces, (M)arkers, (C)ompression types and image (R)egistration
authorities will be referred to as PTSMCR items. ISO/IEC JTC 1 SC 29 will delegate to a designated Authority the role
to collect, study, approve, register and disseminate the relevant information to allow for the customization of
JPEG standard.
The following table gives an overview of the main issues about registration of PTSMCR items.
Designation Origin of requests Qty range Notes
P Profile std. implementers units fundamental issue
T index Tag application field tens various contents (Note 1)
S colour Space std implementers units technical issue
M Marker std implementers units restricted use
C Compression conceptor units standards use
R REGAUT institutions thousands through National Bodies (Note 2)
NOTE 1 – Tags can create a language problem, and this Recommendation | International Standard stipulates that only the English
version of the content can be registered to avoid misunderstanding. The National Bodies should provide translation facilities for
registrants in their countries.
NOTE 2 – Due to the large number of potential applicants, the PTSMCR Authority delegates the National Bodies to register new
REGAUTs. This disposition solves the language and the legal problems raised from different countries.
2 Normative references
The following Recommendations and International Standards contain provisions which, through references in this text,
constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated
were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this
Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent
edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently
valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently
valid ITU-T Recommendations.
2.1 Identical ITU-T Recommendations | International Standards
– CCITT Recommendation T.81 (1992) | ISO/IEC 10918-1:1994, Information technology – Digital
compression and coding of continuous-tone still images: Requirements
...