IEC 61937-2:2007

IEC 61937-2 ®
Edition 2.2 2018-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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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.
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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.
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IEC 61937-2 ®
Edition 2.2 2018-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.30 ISBN 978-2-8322-5518-6

IEC 61937-2 ®
Edition 2.2 2018-03
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
– 2 – IEC 61937-2:2007+AMD1:2011
+AMD2:2018 CSV  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION to Amendment 1 . 5
INTRODUCTION to Amendment 2 . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
4 Burst-info . 8
4.1 General . 8
4.2 Data-type and subdata-type . 9
4.3 Audio data-bursts . 12
4.3.1 General . 12
4.3.2 AC-3 . 12
4.3.3 MPEG-1 layer-1 . 12
4.3.4 MPEG-1 layer-2 or layer-3 or MPEG-2 without extension . 12
4.3.5 MPEG-2 with extension . 13
4.3.6 MPEG-2 AAC . 13
4.3.7 MPEG-2 layer-1 low sampling frequency . 13
4.3.8 MPEG-2 layer-2 low sampling frequency . 13
4.3.9 MPEG-2 layer-3 low sampling frequency . 13
4.3.10 DTS type I . 13
4.3.11 DTS type II . 13
4.3.12 DTS type III . 13
4.3.13 DTS type IV . 13
4.3.14 ATRAC . 14
4.3.15 ATRAC 2/3 . 14
4.3.16 ATRAC-X . 14
4.3.17 MPEG-2 AAC low sampling frequency . 14
4.3.18 MPEG-4 AAC . 14
4.3.19 Windows Media Audio professional. 14
4.3.20 Enhanced AC-3 . 14
4.3.21 MAT . 14
4.3.22 MPEG-4 ALS . 15
4.3.23 MPEG-4 AAC LC in LATM/LOAS . 15
4.3.24 MPEG-4 HE AAC in LATM/LOAS . 15
4.3.25 DRA . 15
4.3.26 ATRAC-X low latency . 15
4.3.27 MPEG-H 3D Audio . 15
4.3.28 AC-4, AC-4 HBR4, AC-4 HBR16 and AC-4 LD . 16
4.3.29 MPEG-4 ALS in LATM/LOAS . 16
Bibliography . 17

Table 1 – Fields of burst-info . 9
Table 2 – Data-types . 9

+AMD2:2018 CSV  IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –
Part 2: Burst-info
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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.
This consolidated version of the official IEC Standard and its amendments has been prepared
for user convenience.
IEC 61937-2 edition 2.2 contains the second edition (2007-05) [documents 100/1115/CDV and
100/1221/RVC], its amendment 1 (2011-10) [documents 100/1811/CDV and 100/1884/RVC] and its
amendment 2 (2018-03) [documents 100/2944/CDV and 100/3032/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.

– 4 – IEC 61937-2:2007+AMD1:2011
+AMD2:2018 CSV  IEC 2018
International Standard IEC 61937-2 has been prepared by technical area 4: Digital system
interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia
systems and equipment.
a) New audio data-types of enhanced AC-3 data, MPEG-2 AAC low sampling frequency,
MPEG-4 AAC, DTS type IV, ATRAC-X, WMA professional and MAT are added.
b) Data-type field in Pc is expanded from bit 0-4 to 0-6.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 61937 series, under the general title Digital audio –
Interface for non-linear PCM encoded audio bitstreams applying IEC 60958, can be found on
the IEC website.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
+AMD2:2018 CSV  IEC 2018
INTRODUCTION to Amendment 1
The revision of IEC 61937-2 (2007) has become necessary to define additional data types, in
order to be consistent with the data-type field descrip
...

IEC 61937-2 ®
Edition 2.0 2007-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à la CEI 60958 –
Partie 2: Salve d'informations

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
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: 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.
 Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
 IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
 Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
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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.
 Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
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publications parues. Disponible en-ligne et aussi par email.
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Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
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Service clients ou contactez-nous:
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IEC 61937-2 ®
Edition 2.0 2007-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
Audionumérique – Interface pour les flux de bits audio à codage MIC non linéaire
conformément à la CEI 60958 –
Partie 2: Salve d'informations

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX L
ICS 33.160.30 ISBN 978-2-88912-693-4

– 2 – 61937-2  IEC:2007
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
4 Burst-info . 7
4.1 General . 7
4.2 Data-type and subdata-type . 7
4.3 Audio data-bursts . 9
4.3.1 General . 9
4.3.2 AC-3 . 9
4.3.3 MPEG-1 layer-1 . 9
4.3.4 MPEG-1 layer-2 or -3 or MPEG-2 without extension . 9
4.3.5 MPEG-2 with extension . 9
4.3.6 MPEG-2 AAC . 9
4.3.7 MPEG-2 layer-1 low sampling frequency . 9
4.3.8 MPEG-2 layer-2 low sampling frequency . 10
4.3.9 MPEG-2 layer-3 low sampling frequency . 10
4.3.10 DTS type I . 10
4.3.11 DTS type II . 10
4.3.12 DTS type III . 10
4.3.13 DTS type IV . 10
4.3.14 ATRAC . 10
4.3.15 ATRAC 2/3 . 10
4.3.16 ATRAC-X . 10
4.3.17 MPEG-2 AAC low sampling frequency . 10
4.3.18 MPEG-4 AAC . 11
4.3.19 Windows Media Audio professional. 11
4.3.20 Enhanced AC-3 . 11
4.3.21 MAT . 11

Table 1 – Fields of burst-info . 7
Table 2 – Data-types . 8

61937-2  IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 2: Burst-info
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 61937-2 has been prepared by technical area 4: Digital system
interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia
systems and equipment.
This second edition of IEC 61937-2 cancels and replaces the first edition published in 2000.
This edition contains the following significant technical changes with respect to the previous
edition.
a) New audio data-types of enhanced AC-3 data, MPEG-2 AAC low sampling frequency,
MPEG-4 AAC, DTS type IV, ATRAC-X, WMA professional and MAT are added.
b) Data-type field in Pc is expanded from bit 0-4 to 0-6.

– 4 – 61937-2  IEC:2007
This bilingual version corresponds to the monolingual English version, published in 2007-05.
The text of this standard is based on the following documents:
CDV Report on voting
100/1115/CDV 100/1221/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.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 61937 series, under the general title Digital audio –
Interface for non-linear PCM encoded audio bitstreams applying IEC 60958, can be found on
the IEC website.
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.
61937-2  IEC:2007 – 5 –
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 2: Burst-info
1 Scope
This part of IEC 61937 specifies the digital au
...

IEC 61937-2 ®
Edition 2.1 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à la CEI 60958 –
Partie 2: Salve d'informations

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
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: 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.
 Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
 IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
 Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
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.
 Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
 Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
 Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
 Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: csc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 61937-2 ®
Edition 2.1 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 2: Burst-info
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à la CEI 60958 –
Partie 2: Salve d'informations

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CD
ICS 33.160.30 ISBN 978-2-88912-797-9

– 2 – 61937-2  IEC:2007+A1:2011

CONTENTS
FOREWORD . 3

INTRODUCTION (to Amendment 1) . 5

1 Scope . 6

2 Normative references . 6

3 Terms, definitions and abbreviations . 7

3.1 Terms and definitions . 7

3.2 Abbreviations . 8
4 Burst-info . 8
4.1 General . 8
4.2 Data-type and subdata-type . 9
4.3 Audio data-bursts . 11
4.3.1 General . 12
4.3.2 AC-3 . 12
4.3.3 MPEG-1 layer-1 . 12
4.3.4 MPEG-1 layer-2 or -3 or MPEG-2 without extension . 12
4.3.5 MPEG-2 with extension . 12
4.3.6 MPEG-2 AAC . 13
4.3.7 MPEG-2 layer-1 low sampling frequency . 13
4.3.8 MPEG-2 layer-2 low sampling frequency . 13
4.3.9 MPEG-2 layer-3 low sampling frequency . 13
4.3.10 DTS type I . 13
4.3.11 DTS type II . 13
4.3.12 DTS type III . 13
4.3.13 DTS type IV . 13
4.3.14 ATRAC . 13
4.3.15 ATRAC 2/3 . 14
4.3.16 ATRAC-X . 14
4.3.17 MPEG-2 AAC low sampling frequency . 14
4.3.18 MPEG-4 AAC . 14
4.3.19 Windows Media Audio professional. 14
4.3.20 Enhanced AC-3 . 14

4.3.21 MAT . 14
4.3.22 MPEG-4 ALS . 15
4.3.23 MPEG-4 AAC LC in LATM/LOAS . 15
4.3.24 MPEG-4 HE AAC in LATM/LOAS . 15
4.3.25 DRA . 15

Table 1 – Fields of burst-info . 8
Table 2 – Data-types . 10

61937-2  IEC:2007+A1:2011 – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED

AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 2: Burst-info
FOREWORD
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This consolidated version of IEC 61937-2 consists of the second edition (2007)
[documents 100/1115/CDV and 100/1221/RVC] and its amendment 1 (2011) [documents
100/1811/CDV and 100/1884/RVC]. It bears the edition number 2.1.
The technical content is therefore identical to the base edition and its amendment and
has been prepared for user convenience. A vertical line in the margin shows where the
base publication has been modified by amendment 1. Additions and deletions are
displayed in red, with deletions being struck through.

– 4 – 61937-2  IEC:2007+A1:2011

International Standard IEC 61937-2 has been prepared by technical area 4: Digital system
interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia

systems and equipment.
a) New audio data-types of enhanced AC-3 data, MPEG-2 AAC low sampling frequency,

MPEG-4 AAC, DTS type IV, ATRAC-X, WMA professional and MAT are added.

b) Data-type field in Pc is expanded from bit 0-4 to 0-6.

The bilingual version (2011-10) corresponds to the monolingual English version, published in

2007-0
...