IEC 61937-6:2006
(Main)Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4 AAC formats
Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4 AAC formats
IEC 61937-6:2006 specifies the method for IEC 60958 to convey non-linear PCM bitstreams encoded in accordance with the MPEG-2 AAC (Advanced Audio Coding) and MPEG-4 AAC formats. This second edition of IEC 61937-6 cancels and replaces the first edition published in 2002. It contains the following significant technical changes:
- addition of data-type for MPEG2 AAC low sampling frequency;
- addition of data-type for MPEG-4 AAC.
Audionumérique - Interface pour les flux de bits audio à codage MIC non linéaire conformement à la CEI 60958 - Partie 6: Flux de bits MIC non linéaire selon les formats MPEG-2 AAC et MPEG-4 AAC
La CEI 61937-6:2006 spécifie la méthode de la CEI 60958 pour acheminer des flux de bits MIC non linéaire codés selon les formats MPEG-2 AAC (codage du son avancé) et MPEG-4 AAC. Cette deuxième édition de la CEI 61937-6 annule et remplace la première édition parue en 2002. Elle contient les modifications techniques importantes suivantes:
- ajout du type de données au format MPEG-2 AAC à faible fréquence d'échantillonnage;
- ajout du type de données au format MPEG-4 AAC.
General Information
Relations
Buy Standard
Standards Content (Sample)
INTERNATIONAL IEC
STANDARD 61937-6
Second edition
2006-01
Digital audio – Interface for non-linear PCM
encoded audio bitstreams applying IEC 60958 –
Part 6:
Non-linear PCM bitstreams according
to the MPEG-2 AAC and MPEG-4 AAC
audio formats
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
search by a variety of criteria including text searches, technical committees
and date of publication. On-line information is also available on recently issued
publications, withdrawn and replaced publications, as well as corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/online_news/ justpub)
is also available by email. Please contact the Customer Service Centre (see
below) for further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
INTERNATIONAL IEC
STANDARD 61937-6
Second edition
2006-01
Digital audio – Interface for non-linear PCM
encoded audio bitstreams applying IEC 60958 –
Part 6:
Non-linear PCM bitstreams according
to the MPEG-2 AAC and MPEG-4 AAC
audio formats
IEC 2006 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale S
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
– 2 – 61937-6 IEC:2006(E)
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms, definitions, abbreviations and presentation convention .6
3.1 Terms and definitions .6
3.2 Abbreviations .7
3.3 Presentation convention .7
4 Mapping of the audio bitstream on to IEC 61937 .7
4.1 MPEG-2 AAC burst-info.7
4.2 MPEG-4 AAC burst-info.8
5 Format of MPEG-2 AAC and MPEG-4 AAC data-bursts .8
5.1 Pause data-burst.9
5.2 Audio data-bursts .9
Figure 1 – MPEG-2 AAC data-burst .9
Figure 2 – Latency of MPEG-2 AAC decoding.10
Figure 3 – MPEG-2 AAC half-rate low sampling frequency data-burst .11
Figure 4 – Latency of MPEG-2 AAC half-rate low sampling frequency decoding.12
Figure 5 – MPEG-2 AAC quarter-rate low sampling frequency data-burst.13
Figure 6 – Latency of MPEG-2 AAC quarter-rate low sampling frequency decoding .14
Figure 7 – MPEG-4 AAC data-burst .15
Figure 7 – Latency of MPEG-4 AAC decoding.16
Figure 8 – MPEG-4 AAC half-rate low sampling frequency data-burst .16
Figure 9 – Latency of MPEG-4 AAC half-rate low sampling frequency decoding.17
Figure 10 – MPEG-4 AAC quarter-rate low sampling frequency data-burst.18
Figure 11 – Latency of MPEG-4 AAC quarter-rate low sampling frequency decoding .19
Figure 12 – MPEG-4 AAC double-rate high sampling frequency data-burst .20
Figure 13 – Latency of MPEG-4 AAC double-rate high sampling frequency decoding.21
Table 1 – Fields of burst-info (data-type=7) .7
Table 2 – Fields of burst-info (data-type=19).8
Table 3 – Fields of burst-info (data-type=20).8
Table 4 – Repetition period of pause data-bursts .9
Table 5 – Repetition period of pause data-bursts .9
Table 6 – Data-type-dependent information for data-type MPEG-2 AAC.10
Table 7 – Data-type-dependent information for data-type MPEG-2 AAC
half-rate low sampling frequency.11
Table 8 – Data-type-dependent information for data-type MPEG-2 AAC
quarter-rate low sampling frequency .13
61937-6 IEC:2006(E) – 3 –
Table 9 – Data-type-dependent information for data-type MPEG-4 AAC.15
Table 10 – Data-type-dependent information for data-type MPEG-4 AAC
half-rate low sampling frequency.17
Table 11 – Data-type-dependent information for data-type MPEG-4 AAC
quarter-rate low sampling frequency .18
Table 12 – Data-type-dependent information for data-type MPEG-4 AAC
double-rate high sampling frequency .20
– 4 – 61937-6 IEC:2006(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –
Part 6: Non-linear PCM bitstreams according to
the MPEG-2 AAC and MPEG-4 AAC formats
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as
“IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee
interested in the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates
closely with the International Organization for Standardization (ISO) in accordance with conditions determined
by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of
IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other
IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61937-6 has been prepared by technical area 4: Digital systems
interfaces, of IEC technical committee 100: Audio, video and multimedia systems and
equipment.
This second edition of IEC 61937-6 cancels and replaces the first edition published in 2002.
This edition contains the following significant technical changes with respect to the previous
edition:
a) addition of data-type for MPEG2 AAC low sampling frequency;
b) addition of data-type for MPEG-4 AAC.
61937-6 IEC:2006(E) – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
100/942/CDV 100/1043A/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61937 consists of the following parts under the general title Digital audio – Interface for
non-linear PCM encoded audio bitstreams applying IEC 60958:
Part 1: General
Part 2: Burst-info
Part 3: Non-linear bitstreams according to the AC-3 format
Part 4: Non-linear PCM bitstreams according to the MPEG audio formats
Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater Systems)
format(s)
Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4 AAC
formats
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X
formats
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this document may be issued at a later date.
– 6 – 61937-6 IEC:2006(E)
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –
Part 6: Non-linear PCM bitstreams according to
the MPEG-2 AAC and MPEG-4 AAC formats
1 Scope
This part of IEC 61937 specifies the method for IEC 60958 to convey non-linear PCM
bitstreams encoded in accordance with the MPEG-2 AAC (Advanced Audio Coding) and
MPEG-4 AAC formats.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60958 (all parts), Digital audio interface
IEC 61937 (all parts), Digital audio – Interface for non-linear PCM encoded audio bitstreams
applying IEC 60958
IEC 61937-1, Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 – Part 1: General
IEC 61937-2, Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 – Part 2: Burst-info
ISO/IEC 13818-7:2004, Information technology – Generic coding of moving pictures and
associated audio information – Part 7: Advanced Audio Coding (AAC)
ISO/IEC 14496-3:2001, Information technology – Coding of aud
...
IEC 61937-6 ®
Edition 2.0 2006-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4
AAC formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à la CEI 60958 –
Partie 6: Flux de bits MIC non linéaire selon les formats MPEG-2 AAC et MPEG-4
AAC
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les
microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.
IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: csc@iec.ch.
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
Liens utiles:
Recherche de publications CEI - www.iec.ch/searchpub Electropedia - www.electropedia.org
La recherche avancée vous permet de trouver des Le premier dictionnaire en ligne au monde de termes
publications CEI en utilisant différents critères (numéro de électroniques et électriques. Il contient plus de 30 000
référence, texte, comité d’études,…). termes et définitions en anglais et en français, ainsi que
Elle donne aussi des informations sur les projets et les les termes équivalents dans les langues additionnelles.
publications remplacées ou retirées. Egalement appelé Vocabulaire Electrotechnique
International (VEI) en ligne.
Just Published CEI - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications de la CEI.
Just Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur
Disponible en ligne et aussi une fois par mois par email. cette publication ou si vous avez des questions
contactez-nous: csc@iec.ch.
IEC 61937-6 ®
Edition 2.0 2006-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4
AAC formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à la CEI 60958 –
Partie 6: Flux de bits MIC non linéaire selon les formats MPEG-2 AAC et MPEG-4
AAC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 33.160.60; 35.040 ISBN 978-2-83220-529-7
– 2 – 61937-6 IEC:2006
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviations and presentation convention . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
3.3 Presentation convention . 7
4 Mapping of the audio bitstream on to IEC 61937 . 7
4.1 MPEG-2 AAC burst-info . 7
4.2 MPEG-4 AAC burst-info . 8
5 Format of MPEG-2 AAC and MPEG-4 AAC data-bursts . 8
5.1 Pause data-burst . 9
5.2 Audio data-bursts . 9
Figure 1 – MPEG-2 AAC data-burst . 9
Figure 2 – Latency of MPEG-2 AAC decoding . 10
Figure 3 – MPEG-2 AAC half-rate low sampling frequency data-burst . 11
Figure 4 – Latency of MPEG-2 AAC half-rate low sampling frequency decoding . 12
Figure 5 – MPEG-2 AAC quarter-rate low sampling frequency data-burst . 13
Figure 6 – Latency of MPEG-2 AAC quarter-rate low sampling frequency decoding . 14
Figure 7 – MPEG-4 AAC data-burst . 15
Figure 8 – Latency of MPEG-4 AAC decoding . 16
Figure 9 – MPEG-4 AAC half-rate low sampling frequency data-burst . 16
Figure 10 – Latency of MPEG-4 AAC half-rate low sampling frequency decoding . 17
Figure 11 – MPEG-4 AAC quarter-rate low sampling frequency data-burst . 18
Figure 12 – Latency of MPEG-4 AAC quarter-rate low sampling frequency decoding . 19
Figure 13 – MPEG-4 AAC double-rate high sampling frequency data-burst . 20
Figure 14 – Latency of MPEG-4 AAC double-rate high sampling frequency decoding . 21
Table 1 – Fields of burst-info (data-type=7) . 7
Table 2 – Fields of burst-info (data-type=19) . 8
Table 3 – Fields of burst-info (data-type=20) . 8
Table 4 – Repetition period of pause data-bursts . 9
Table 5 – Repetition period of pause data-bursts . 9
Table 6 – Data-type-dependent information for data-type MPEG-2 AAC . 10
Table 7 – Data-type-dependent information for data-type MPEG-2 AAC
half-rate low sampling frequency. 11
Table 8 – Data-type-dependent information for data-type MPEG-2 AAC
quarter-rate low sampling frequency . 13
61937-6 IEC:2006 – 3 –
Table 9 – Data-type-dependent information for data-type MPEG-4 AAC . 15
Table 10 – Data-type-dependent information for data-type MPEG-4 AAC
half-rate low sampling frequency. 17
Table 11 – Data-type-dependent information for data-type MPEG-4 AAC
quarter-rate low sampling frequency . 18
Table 12 – Data-type-dependent information for data-type MPEG-4 AAC
double-rate high sampling frequency . 20
– 4 – 61937-6 IEC:2006
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –
Part 6: Non-linear PCM bitstreams according to
the MPEG-2 AAC and MPEG-4 AAC formats
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as
“IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee
interested in the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates
closely with the International Organization for Standardization (ISO) in accordance with conditions determined
by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of
IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other
IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61937-6 has been prepared by technical area 4: Digital systems
interfaces, of IEC technical committee 100: Audio, video and multimedia systems and
equipment.
This second edition of IEC 61937-6 cancels and replaces the first edition published in 2002.
This edition contains the following significant technical changes with respect to the previous
edition:
a) addition of data-type for MPEG2 AAC low sampling frequency;
b) addition of data-type
...
IEC 61937-6 ®
Edition 2.1 2014-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4
AAC formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à l’IEC 60958 –
Partie 6: Flux de bits MIC non linéaire selon les formats MPEG-2 AAC et MPEG-4
AAC
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,
77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
La recherche avancée permet de trouver des publications IEC Plus de 55 000 entrées terminologiques électrotechniques, en
en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des
CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.
IEC 61937-6 ®
Edition 2.1 2014-01
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4
AAC formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à l’IEC 60958 –
Partie 6: Flux de bits MIC non linéaire selon les formats MPEG-2 AAC et MPEG-4
AAC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160.60; 35.040 ISBN 978-2-8322-1372-8
IEC 61937-6 ®
Edition 2.1 2014-01
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 6: Non-linear PCM bitstreams according to the MPEG-2 AAC and MPEG-4
AAC formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à l’IEC 60958 –
Partie 6: Flux de bits MIC non linéaire selon les formats MPEG-2 AAC et MPEG-4
AAC
– 2 – 61937-6 IEC:2006+A1:2014
CONTENTS
FOREWORD . 4
INTRODUCTION TO AMENDMENT 1 . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviations and presentation convention . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
3.3 Presentation convention . 8
4 Mapping of the audio bitstream on to IEC 61937 . 8
4.1 MPEG-2 AAC burst-info . 8
4.2 MPEG-4 AAC burst-info . 9
5 Format of MPEG-2 AAC and MPEG-4 AAC data-bursts . 10
5.1 Pause data-burst . 10
5.2 Audio data-bursts . 10
Figure 1 – MPEG-2 AAC data-burst . 11
Figure 2 – Latency of MPEG-2 AAC decoding . 12
Figure 3 – MPEG-2 AAC half-rate low sampling frequency data-burst . 12
Figure 4 – Latency of MPEG-2 AAC half-rate low sampling frequency decoding . 14
Figure 5 – MPEG-2 AAC quarter-rate low sampling frequency data-burst . 15
Figure 6 – Latency of MPEG-2 AAC quarter-rate low sampling frequency decoding . 16
Figure 7 – MPEG-4 AAC data-burst . 16
Figure 8 – Latency of MPEG-4 AAC decoding . 18
Figure 9 – MPEG-4 AAC half-rate low sampling frequency data-burst . 18
Figure 10 – Latency of MPEG-4 AAC half-rate low sampling frequency decoding . 20
Figure 11 – MPEG-4 AAC quarter-rate low sampling frequency data-burst . 20
Figure 12 – Latency of MPEG-4 AAC quarter-rate low sampling frequency decoding . 22
Figure 13 – MPEG-4 AAC double-rate high sampling frequency data-burst . 22
Figure 14 – Latency of MPEG-4 AAC double-rate high sampling frequency decoding . 23
Table 1 – Fields of burst-info (data-type=7) . 9
Table 2 – Fields of burst-info (data-type=19) . 9
Table 3 – Fields of burst-info (data-type=20) . 9
Table 4 – Repetition period of pause data-bursts . 10
Table 5 – Repetition period of pause data-bursts . 10
Table 6 – Data-type-dependent information for data-type MPEG-2 AAC . 11
Table 7 – Data-type-dependent information for data-type MPEG-2 AAC
half-rate low sampling frequency. 13
Table 8 – Data-type-dependent information for data-type MPEG-2 AAC
quarter-rate low sampling frequency . 15
61937-6 IEC:2006+A1:2014 – 3 –
Table 9 – Data-type-dependent information for data-type MPEG-4 AAC . 17
Table 10 – Data-type-dependent information for data-type MPEG-4 AAC
half-rate low sampling frequency. 19
Table 11 – Data-type-dependent information for data-type MPEG-4 AAC
quarter-rate low sampling frequency . 21
Table 12 – Data-type-dependent information for data-type MPEG-4 AAC
double-rate high sampling frequency . 23
– 4 – 61937-6 IEC:2006+A1:2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –
Part 6: Non-linear PCM bitstreams according to
the MPEG-2 AAC and MPEG-4 AAC formats
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC Nationa
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.