ISO/IEC 15444-2:2004/Amd 4:2015

Information technology — JPEG 2000 image coding system: Extensions — Part 2: — Amendment 4: Block coder extension

Technologies de l'information — Système de codage d'images JPEG 2000: Extensions — Partie 2: — Amendement 4: Extension de l'encodeur de bloc

General Information

• Status: Withdrawn
• Publication Date: 16-Jul-2015
• Withdrawal Date: 16-Jul-2015
• ICS: 35.040 - Information coding
• 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: 12-Nov-2021

Relations

• Revised: ISO/IEC 15444-2:2021 - Information technology — JPEG 2000 image coding system — Part 2: Extensions
• Effective Date: 21-Aug-2021
• Amends: ISO/IEC 15444-2:2004 - Information technology — JPEG 2000 image coding system: Extensions — Part 2:
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 15444-2
First edition
2004-05-15
AMENDMENT 4
2015-07-15
Information technology — JPEG 2000
image coding system: Extensions
AMENDMENT 4: Block coder extension
Technologies de l’information — Système de codage d’images JPEG
2000: Extensions
AMENDEMENT 4: Extension de l’encodeur de bloc
Reference number
ISO/IEC 15444-2:2004/Amd.4:2015(E)
©
ISO/IEC 2015

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ISO/IEC 15444-2:2004/Amd.4:2015(E)

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ii © ISO/IEC 2015 – All rights reserved

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ISO/IEC 15444-2:2004/Amd.4:2015(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. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. 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 document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 4 to ISO/IEC 15444-2 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 Rec.T. 801/Amd.4.
© ISO/IEC 2015 – All rights reserved iii

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ISO/IEC 15444-2:2004/Amd.4:2015(E)
INTERNATIONAL STANDARD
ISO/IEC 15444-2:2004/FDAM 4 (E)
Rec. ITU-T T.801 (02/2002)/Amd.4 (201X)
ITU-T RECOMMENDATION
Information technology – JPEG 2000 image coding system: Extensions
AMENDMENT 4: Block coder extension
1. A.3.13
Insert the following text immediately before the paragraph commencing "Guidance on usage (informative)".
Table A-51 defines Ccap values corresponding to k=2, i.e., extended capabilities that are defined in this International
Standard | Recommendation.
Table A-51 - Part parameter values for the Ccap parameter
Values (bits) Part parameter
MSB        LSB
1xxx xxxx xxxx xxxx Block coder extensions may be present, as defined in
COD or COC marker segments
   
All other values reserved
2. A.2.3
Insert the following text after the line beginning "Geometric manipulation is enabled with two bits in the Scod parameter
shown in Table A.5.":
Block coder extensions are enabled with 1 bit in the Scod parameter, as shown in Table A-5. When this bit is set, the
COD marker segment is extended to include a 16-bit parameter SXcod that follows SPcod as shown in Figure A-14. The
meaning of SXcod is defined by Table A-49.
SGcod
COD Lcod
Scod   SPcod   SXcod
Figure A-14 – Coding style default syntax
3. Table A-5
Add the following lines to Table A-5:
xx0x xxxx Block coder extensions not used
xx1x xxxx Block coder extensions defined by SXcod
Rec. ITU-T T.801 (02/2002)/Amd.4 (2015) 1

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ISO/IEC 15444-2:2004/Amd.4:2015(E)
4. Table A-49
Add the following Table:
Table A-49 – Block Coder Extensions (see Annex P)
Values (bits) Coding style
MSB   LSB
xxxx xxxx xxxx xx00 No modifications to selective arithmetic coder bypass mode
xxxx xxxx xxxx xx01 Selective arithmetic coder bypass modified to start from the 2nd significant bit-
plane if bit 0 of SPcod/SPcoc set.
xxxx xxxx xxxx xx10 Selective arithmetic coder bypass modified to start from the 3rd significant bit-
plane if bit 0 of SPcod/SPcoc set.
xxxx xxxx xxxx xx11 Selective arithmetic coder bypass modified to start f
...