ISO/IEC 15444-9:2023

INTERNATIONAL ISO/IEC
STANDARD 15444-9
Second edition
2023-05
Information technology — JPEG 2000
image coding system —
Part 9:
Interactivity tools, APIs and protocols
Technologies de l'information — Système de codage d'images JPEG
2000 —
Partie 9: Outils d'interactivité, interfaces de programmes
d'application et protocoles
Reference number
ISO/IEC 15444-9:2023(E)
© ISO/IEC 2023

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ISO/IEC 15444-9:2023(E)
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ii
 © ISO/IEC 2023 – All rights reserved

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ISO/IEC 15444-9:2023(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
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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.
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had
not received notice of (a) patent(s) which may be required to implement this document. However,
implementers are cautioned that this may not represent the latest information, which may be obtained
from the patent database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall
not be held responsible for identifying any or all such patent rights.
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 ITU-T T.808) 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 15444-9:2005), which has been
technically revised. It also incorporates the Amendment(s) ISO/IEC 15444-9:2005/Amd 1:2006,
ISO/IEC 15444-9:2005/Amd 2:2008, ISO/IEC 15444-9:2005/Amd 3:2008, ISO/IEC 15444-9:2005/Amd
4:2010 and ISO/IEC 15444-9:2005/Amd 5:2014 and the Technical Corrigenda ISO/IEC 15444-
9:2005/Cor 1:2007, ISO/IEC 15444-9:2005/Cor 2:2008 and ISO/IEC 15444-9:2005/Cor 3:2011.
The main changes are as follows:
— extends support for the file format specified in Rec. ITU-T T.815 | ISO/IEC 15444-16;
— clarifies normative server responsibilities in response to certain request fields documented in
Annex C;
— removes the registration authority (Annex L); and
— adds media type registration information (Annex O).
A list of all parts in the ISO/IEC 15444 series can be found on the ISO and IEC websites.
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ISO/IEC 15444-9:2023(E)
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.

iv © ISO/IEC 2023 – All rights reserved

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ISO/IEC 15444-9:2023 (E)
INTERNATIONAL STANDARD ISO/IEC 15444-9
RECOMMENDATION ITU-T T.808
Information technology – JPEG 2000 image coding system:
Interactivity tools, APIs and protocols
Summary
Rec. ITU-T T.808 | ISO/IEC 15444-9 provides a network protocol that allows for the interactive and progressive
transmission of JPEG 2000 coded data and files from a server to a client. The first edition of this Recommendation |
International Standard dates to 2005. It has since then been supplemented by amendments and corrigenda. Additionally,
other members of the JPEG 2000 family of Recommendations | International Standards, that are capable of being used
with the network protocol described in this Recommendation | International Standard have since been introduced. This
second edition incorporates the changes associated with these developments, without modifying the original scope.
This Recommendation was developed jointly with ISO/IEC JTC 1/SC 29/WG 1 (JPEG), and is common text with
ISO/IEC 15444-9.
This second edition cancels and replaces the first edition, which has been technically revised.
The main changes compared to the previous edition are as follows:
1. consolidates all outstanding amendments and corrigenda published since the first edition;
2. extends support for the file format specified in Rec. ITU-T T.815 | ISO/IEC 15444-16;
3. clarifies normative server responsibilities in response to certain request fields documented in Annex C;
4. removes the registration authority (Annex L); and
5. adds media type registration information (Annex O).
This Recommendation contains an electronic attachment that is available from the ITU website at:
https://handle.itu.int/11.1002/2000/7460, and from the ISO website at: https://standards.iso.org/iso-iec/15444/-9\ed-2/en.
History
*
Edition Recommendation Approval Study Group
Unique ID
1.0 ITU-T T.808 2005-01-08 16
11.1002/1000/7460
1.1 ITU-T T.808 (2005) Amd. 1 2006-05-29 16
11.1002/1000/8815
1.2 ITU-T T.808 (2005) Cor. 1 2007-01-13 16
11.1002/1000/9049
1.3 ITU-T T.808 (2005) Amd. 2 2007-08-29 16
11.1002/1000/9232
1.4 ITU-T T.808 (2005) Cor. 2 2008-06-13 16
11.1002/1000/9517
1.5 ITU-T T.808 (2005) Amd. 3 2008-06-13 16
11.1002/1000/9516
1.6 ITU-T T.808 (2005) Amd. 4 2010-05-22 16
11.1002/1000/10646
1.7 ITU-T T.808 (2005) Cor. 3 2011-05-14 16
11.1002/1000/11315
1.8 ITU-T T.808 (2005) Amd. 5 2013-03-16 16
11.1002/1000/11884
2.0 ITU-T T.808 (V2) 2022-12-14 16
11.1002/1000/15209
Keywords
API, application programme interface, image coding, interactivity, JPEG 2000, protocols.

*
To access the Recommendation, type the URL http://handle.itu.int/ in the address field of your web browser, followed
by the Recommendation's unique ID. For example, http://handle.itu.int/11.1002/1000/11830-en.
© ISO/IEC 2023 – All rights reserved
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ISO/IEC 15444-9:2023 (E)
FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of
telecommunications, information and communication technologies (ICTs). The ITU Telecommunication
Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical,
operating and tariff questions and issuing Recommendations on them with a view to standardizing
telecommunications on a worldwide basis.
The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes
the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics.
The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1.
In some areas of information technology which fall within ITU-T's purview, the necessary standards are
prepared on a collaborative basis with ISO and IEC.
NOTE
In this Recommendation, the expression "Administration" is used for conciseness to indicate both a
telecommunication administration and a recognized operating agency.
Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain
mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the
Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some other
obligatory language such as "must" and the negative equivalents are used to express requirements. The use of
such words does not suggest that compliance with the Recommendation is required of any party.
INTELLECTUAL PROPERTY RIGHTS
ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve
the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or
applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of
the Recommendation development process.
As of the date of approval of this Recommendation, ITU had not received notice of intellectual property,
protected by patents/software copyrights, which may be required to implement this Recommendation.
However, implementers are cautioned that this may not represent the latest information and are therefore
strongly urged to consult the appropriate ITU-T databases available via the ITU-T website at
http://www.itu.int/ITU-T/ipr/.
© ITU 2023
All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior
written permission of ITU.
vi Rec. ITU-T T.808 (12/2022)
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ISO/IEC 15444-9:2023 (E)
CONTENTS
Page
1 Scope . 1
2 Normative references. 1
3 Definitions . 2
3.1 JPEG 2000 definitions . 2
3.2 HTTP definitions . 2
3.3 JPIP definitions . 2
3.4 Symbols . 4
4 Abbreviations . 6
5 Conventions . 6
5.1 ABNF rules . 6
5.2 File format ABNF rules. 7
5.3 Key to graphical descriptions of boxes (informative) . 7
6 General description . 8
6.1 JPIP protocol . 8
6.2 Purpose . 9
7 Conformance . 10
Annex A – The JPP-stream and JPT-stream media types . 11
A.1 Introduction . 11
A.2 Message header structure . 12
A.3 Data-bins . 14
A.4 Conventions for parsing and delivery of JPP-streams and JPT-streams . 22
A.5 Conventions for JPP-stream or JPT-stream interoperability (informative) . 22
Annex B – Sessions, channels, cache model and model-sets . 23
B.1 Requests within a session vs. stateless requests . 23
B.2 Channels and sessions . 23
B.3 Cache model management . 24
B.4 Interrogation and manipulation of model-sets . 24
Annex C – Client request . 25
C.1 Request syntax . 25
C.2 Target identification fields . 26
C.3 Fields for working with sessions and channels . 28
C.4 View-window request fields . 29
C.5 Metadata request fields. 42
C.6 Data limiting request fields . 48
C.7 Server control request fields . 48
C.8 Cache management request fields . 52
C.9 Upload request parameters . 57
C.10 Client capability and preference request fields. 57
Annex D – Server response signalling . 65
D.1 Reply syntax . 65
D.2 JPIP response headers . 67
D.3 Response data . 72
Annex E – Uploading images to the server . 73
E.1 Introduction . 73
E.2 Upload request . 73
E.3 Server response . 73
E.4 Merging data on the server . 74
Annex F – Using JPIP over HTTP . 76
F.1 Introduction . 76
F.2 Requests . 76
F.3 Session establishment . 77
Rec. ITU-T T.808 (12/2022) vii
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ISO/IEC 15444-9:2023 (E)
F.4 Responses . 77
F.5 Additional HTTP features . 78
F.6 HTTP and length request field (informative) . 79
Annex G – Using JPIP with HTTP requests and TCP returns . 80
G.1 Introduction . 80
G.2 Client requests . 80
G.3 Session establishment . 80
G.4 Server responses . 81
G.5 TCP and length request field (informative) . 81
Annex H – Using JPIP with alternate transports . 82
H.1 Introduction . 82
H.2 Reliable requests with unreliable data . 82
H.3 Unreliable requests with unreliable data . 83
H.4 Request and response syntax . 83
H.5 Session establishment . 84
Annex I – Indexing JPEG 2000 files for JPIP . 85
I.1 Introduction (informative) . 85
I.2 Identifying the use of JPIP index boxes in the JPEG 2000 file format compatibility list . 86
I.3 Defined boxes. 86
I.4 Association of codestream indexes with codestreams . 94
I.5 Placement restrictions (informative) . 94
Annex J – Profiles and variants for interoperability and testing . 95
J.1 Introduction . 95
J.2 Definition of variants . 95
J.3 Definition of profiles . 96
J.4 Testing methodology . 98
Annex K – Using JPIP with HTTP requests and UDP returns . 103
K.1 Introduction . 103
K.2 Client requests . 103
K.3 Response data delivery and channel establishment . 103
K.4 Server responses . 104
K.5 Framing of response data into chunks . 104
K.6 Client acknowledgement of server responses . 105
K.7 UDP and Maximum Response Length Field (informative) . 106
K.8 Implementation strategies for acknowledged communication (informative) . 106
K.9 Implementation strategies for unacknowledged communication (informative) . 106
Annex L – Registration of extensions . 108
Annex M – Application examples . 109
M.1 Introduction . 109
M.2 Use of JPIP with codestreams in other file formats . 109
M.3 Tile-part implementation techniques . 109
M.4 Precinct-based implementation techniques . 110
M.5 JPIP protocol transcripts . 111
M.6 Using JPIP with HTML. 114
Annex N – JPIP ABNF collection . 115
N.1 JPIP Request ABNF . 115
N.2 JPIP Response BNF . 122
Annex O – Media type specifications and registrations. 126
O.1 General . 126
O.2 JPP-stream . 126
O.3 JPT-stream . 127
Bibliography . 128
xiii Rec. ITU-T T.808 (12/2022)
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ISO/IEC 15444-9:2023 (E)
Figures
Page
Figure 1 – Example of the box description figures . 8
Figure 2 – Example of the superbox description figures . 8
Figure 3 – JPIP protocol overview . 8
Figure 4 – JPIP protocol stack . 9
Figure A.1 – Examples of a JPEG 2000 file, JPIP data-bins and JPIP-stream relationships (after G.J. Colyer
and R.A. Clark, IEEE Trans. Consumer Electronics, 49 (2003), pp. 850–854) . 11
Figure A.2 – VBAS structure . 12
Figure A.3 – Bin-ID VBAS structure . 12
Figure A.4 – Example precinct data-bin . 15
Figure A.5 – Metadata-bin example colour scheme . 16
Figure A.6 – A sample JP2 file . 17
Figure A.7 – A sample JP2 file divided into three metadata-bins. 17
Figure A.8 – A superbox with a referenced metadata-bin . 18
Figure A.9 – An invalid division of the file into metadata-bins . 18
Figure A.10 – Example of the use of stream equivalents . 19
Figure A.11 – Placeholder box structure . 20
Figure C.1 –Desired region within an image . 30
Figure C.2 – Desired region with respect to the subsampled reference grid . 30
Figure C.3 – Colourspace specification box selection procedure . 61
Figure G.1 – Response data structure on http-tcp connection . 81
Figure I.1 – Part of an example JPEG 2000 file containing JPIP index boxes . 86
Figure I.2 – Organization of the contents of a Codestream Index box . 87
Figure I.3 – Organization of the contents of a Codestream Finder box . 88
Figure I.4 –
...