ISO/IEC 23003-1:2007/Amd 2:2008
(Amendment)Information technology — MPEG audio technologies — Part 1: MPEG Surround — Amendment 2: Reference software
Information technology — MPEG audio technologies — Part 1: MPEG Surround — Amendment 2: Reference software
Technologies de l'information — Technologies audio MPEG — Partie 1: Ambiance MPEG — Amendement 2: Logiciel de référence
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 23003-1
First edition
2007-02-15
AMENDMENT 2
2008-08-15
Information technology — MPEG audio
technologies —
Part 1:
MPEG Surround
AMENDMENT 2: Reference software
Technologies de l'information — Technologies audio MPEG —
Partie 1: Ambiance MPEG
AMENDEMENT 2: Logiciel de référence
Reference number
ISO/IEC 23003-1:2007/Amd. 2:2008(E)
©
ISO/IEC 2008
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ISO/IEC 23003-1:2007/Amd. 2:2008(E)
PDF disclaimer
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ii © ISO/IEC 2008 – All rights reserved
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ISO/IEC 23003-1:2007/Amd. 2:2008(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 2 to ISO/IEC 23003-1:2007 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.
© ISO/IEC 2008 – All rights reserved iii
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ISO/IEC 23003-1:2007/Amd. 2:2008(E)
Information technology — MPEG audio technologies —
Part 1:
MPEG Surround
AMENDMENT 2: Reference software
After Clause 8, add a new clause, Reference software, as given below:
9 Reference software
9.1 Reference software structure
9.1.1 Introduction
This clause contains simulation software for MPEG Surround as defined in clauses 1 to 7 and Annexes A to J
of ISO/IEC 23003-1. This software has been derived from verification models used in the process of
developing the standard.
Reference software is normative in the sense that it correctly implements the MPEG Surround decoding
processes described in ISO/IEC 23003-1. Complying ISO/IEC 23003-1 implementations are not expected to
follow the algorithms or the programming techniques used by the reference software. Although the decoding
software is considered normative, it cannot add anything to the textual technical description of MPEG
Surround included in ISO/IEC 23003-1.
The software contained in this clause 9 and in Annex K is divided into three categories:
a) Bitstream decoding software is catalogued in subclause 9.2. This software accepts bitstreams encoded
according to the normative specification in ISO/IEC 23003-1 and decodes the streams into the audio
signals associated with each bitstream. While this software appears in the normative part of this
specification, attention is drawn to the fact that the implementation techniques used in this software are
not considered normative – several different implementations could produce the same result – but the
software is considered normative in that it correctly implements the MPEG Surround decoding processes
described in ISO/IEC 23003-1.
b) Bitstream encoding software is catalogued in Annex K.1 (informative). This software creates bitstreams
from associated audio signals. The encoders are provided as a means to obtain bitstreams with the
normative syntax described in ISO/IEC 23003-1. The techniques used for encoding are not specified by
this specification, and the quality and complexity of these encoders has not been optimized.
c) Utility software is catalogued in Annex K.2 (informative). This software
...
INTERNATIONAL ISO/IEC
STANDARD 23003-1
First edition
2007-02-15
AMENDMENT 2
2008-08-15
Information technology — MPEG audio
technologies —
Part 1:
MPEG Surround
AMENDMENT 2: Reference software
Technologies de l'information — Technologies audio MPEG —
Partie 1: Ambiance MPEG
AMENDEMENT 2: Logiciel de référence
Reference number
ISO/IEC 23003-1:2007/Amd.2:2008(E)
©
ISO/IEC 2008
---------------------- Page: 1 ----------------------
ISO/IEC 23003-1:2007/Amd.2:2008(E)
PDF disclaimer
PDF files may contain embedded typefaces. In accordance with Adobe's licensing policy, such files 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 a PDF 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 the PDF file(s) constituting this document can be found in the General Info relative to
the file(s); the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the files are suitable for
use by ISO member bodies. In the unlikely event that a problem relating to them is found, please inform the Central Secretariat at the
address given below.
This CD-ROM contains:
1) the publication ISO/IEC 23003-1:2007/Amd.2:2008 in portable document format (PDF), which can be
viewed using Adobe® Acrobat® Reader;
2) Reference software for MPEG surround.
Adobe and Acrobat are trademarks of Adobe Systems Incorporated.
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© ISO/IEC 2008
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should be addressed to
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...
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