Information technology — MPEG audio technologies — Part 3: Unified speech and audio coding — Amendment 2: Reference software

Technologies de l'information — Technologies audio MPEG — Partie 3: Discours unifié et codage audio — Amendement 2: Logiciel de référence

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Status
Withdrawn
Publication Date
03-May-2015
Withdrawal Date
03-May-2015
Current Stage
9599 - Withdrawal of International Standard
Completion Date
24-Jun-2020
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INTERNATIONAL ISO/IEC
STANDARD 23003-3
First edition
2012-04-01
AMENDMENT 2
2015-05-01
Information technology — MPEG
audio technologies —
Part 3:
Unified speech and audio coding
AMENDMENT 2: Reference software
Technologies de l’information — Technologies audio MPEG —
Partie 3: Discours unifié et codage audio
AMENDEMENT 2: Logiciel de référence
Reference number
ISO/IEC 23003-3:2012/Amd.2:2015(E)
©
ISO/IEC 2015

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ISO/IEC 23003-3:2012/Amd.2:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2015 – All rights reserved

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ISO/IEC 23003-3:2012/Amd.2:2015(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.
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. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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.
Details of any patent rights identified during the development of the document will be in the Introduction
and/or on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/IEC JTC 1, Information technology, SC 29, Coding of
audio, picture, multimedia and hypermedia information.
This Amendment specifies reference software for ISO/IEC 23003-3:2012 MPEG-D Unified Speech and
Audio Coding (USAC). The USAC reference software is made available as an electronic attachment to
this Amendment.
© ISO/IEC 2015 – All rights reserved iii

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ISO/IEC 23003-3:2012/Amd.2:2015(E)
Information technology — MPEG audio technologies —
Part 3:
Unified speech and audio coding
AMENDMENT 2: Reference software
Add a new Clause 9, “Reference software”, as shown below:
9 Reference software
9.1 Reference software structure
9.1.1 Introduction
This clause contains simulation software for MPEG-D USAC as defined in this part of ISO/IEC 23003-3.
This software has been derived from reference models used in the process of developing this part of
ISO/IEC 23003-3.
Reference software is normative in the sense that it correctly implements the USAC decoding processes
described in this part of ISO/IEC 23003-3. Complying ISO/IEC 23003-3 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 USAC included in this part of ISO/IEC 23003-3.
The software contained in this Clause 9 and in Annex H is divided into several categories:
a) Bitstream decoding software is catalogued in 9.2. This software accepts bitstreams encoded
according to the normative specification in this part of ISO/IEC 23003-3 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 USAC
decoding processes described in this part of ISO/IEC 23003-3.
b) Bitstream encoding software is catalogued in H.1 (informative). The software creates compressed
bitstreams from associated audio signals. The techniques used for encoding are not specified by
this part of ISO/IEC 23003-3. Two encoder software implementations are provided as an electronic
attachment to this part of ISO/IEC 23003-3.
c) Utility software is catalogued in H.2 (informative). This software was found useful by the
developers of this part of ISO/IEC 23003-3, but may not conform to the normative specifications
given in ISO/IEC 23003-3.
9.1.2 Copyright disclaimer for software modules
Each source code module in this specification contains copyright disclaimer which shall not be removed
from the source code module.
© ISO 2015 – All rights reserved 1

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ISO/IEC 23003-3:2012/Amd.2:2015(E)

The generic version of this disclaimer is provided below:
Software Copyright License and Disclaimer for MPEG Standards
This software module was originally developed by () and edited by (),
...

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