ISO/IEC 15444-11:2007/Amd 1:2013

INTERNATIONAL ISO/IEC
STANDARD 15444-11
First edition
2007-04-15
AMENDMENT 1
2013-04-01
Information technology — JPEG 2000
image coding system: Wireless —
AMENDMENT 1: IP based wireless networks
Technologies de l'information — Système de codage d'images
JPEG 2000: Transmission radioélectrique —
AMENDEMENT 1: Réseaux sans fil fondés sur le protocole Internet

Reference number
ISO/IEC 15444-11:2007/Amd.1:2013(E)
©
ISO/IEC 2013
ISO/IEC 15444-11:2007/Amd.1:2013(E)

©  ISO/IEC 2013
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ii © ISO/IEC 2013 – All rights reserved

ISO/IEC 15444-11:2007/Amd.1:2013(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 1 to ISO/IEC 15444-11:2007 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 T.810 (2006)/Amd.1
(01/2012).
© ISO/IEC 2013 – All rights reserved iii

ISO/IEC 15444-11:2007/Amd.1:2013 (E)
INTERN
ATIONAL STANDARD
RECOMMENDATION ITU-T
Information technology – JPEG 2000 image coding system: Wireless
Amendment 1
IP-based wireless networks
1) Annex K
Add Annex K (the current Annexes K and L become Annex L and Annex M, respectively):
Annex K
Virtual data interleaving based error protection
(This annex forms an integral part of this Recommendation | International Standard.)
K.1 Introduction
The objective of this annex is to explain how it is possible, using the tools of JPWL, to apply a virtual interleaving for
enabling robustness to data packet losses and erasures. Error protection techniques described in this Recommendation |
International Standard, can be applied independently, such as Unequal Error Protection or any method described in the
EPC marker segment.
K.2 Interleaving-based error protection methods description
Figure K.1 shows a detailed data flow of the processing steps required for the correction technique. Images are encoded
into codestreams according to Rec. ITU-T T.800 | ISO/IEC 15444-1. After the initialization of the encoding parameters
and structures, EPC and EPB markers are created. The parity bytes of the data are then computed using the virtual
interleaving technique; an invertible address permutation function is used to map the original data stream (the JPEG
2000 bitstream codeblock bytes) into an interleaved one. It should be noted that this step does not change the position of
the compressed data. After the parity data has been calculated, a further interleaving step can be performed on them; in
this case, the interleaving depth can extend over several adjacent codestreams. Eventually, the parity data are dumped
into the codestreams, which are then sent through the transmission channel. At the receiver side, the data is first
interleaved according to the same permutation law adopted during the transmission; afterwards, JPWL error correction
is applied and, eventually, the data is de-interleaved to re-create the ordered codestream.
Rec. ITU-T T.810 (2006)/Amd.1 (01/2012) 1

ISO/IEC 15444-11:2007/Amd.1:2013 (E)
JPEG 2000
Image
Image
part 1
source decoder
JPEG 2000
part 1
source coder
Concealment
Codestream info:
Missing packets,
tiling, dimension,
headers, etc.
Initialization
precision, size, MSE
Data
of JPWL
reduction, etc.
correction
EPC and
EPBs creation
De-interleaving
Interleaving
Reorder
EPBs data
EPBs
parities
De-interleaving
computation
Interleaving Load EPC
and EPBs
Transmission
JPEG 2000
EPB
...