EN 61937-11:2010

Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 11: MPEG-4 AAC and its extensions in LATM/LOAS

IEC 61937-11:2010(E) describes the method to convey non-linear PCM bitstreams encoded according to the MPEG-4 AAC format and its extensions spectral band replication, parametric stereo and MPEG surround, framed in MPEG-4 LATM/LOAS.

Digitalton – Schnittstelle für nichtlinear-PCM-codierte Audio-Bitströme unter Verwendung von IEC 60958 – Teil 11: MPEG-4-AAC und dessen Erweiterungen in LATM/LOAS

Audionumérique - Interface pour les flux de bits audio à codage MIC non linéaire conformément à la CEI 60958 - Partie 11 : MPEG-4 AAC et ses extensions en LATM/LOAS

La CEI 61937-11:2010 décrit la méthode à utiliser pour acheminer les flux de bits à codage MIC non-linéaire selon le format MPEG-4 AAC et ses extensions, reconstruction de bandes spectrales, stéréo paramétrique et MPEG ambiophonique, avec des trames en MPEG-4 LATM/LOAS. La présente version bilingue, publiée en 2011-01, correspond à la version anglaise. La version française de cette norme n'a pas été soumise au vote.

Digitalni avdio - Vmesnik za nelinearne PCM-kodirane avdio bitne tokove po IEC 60958 - 11. del: MPEG-4 AAC in njegove razširitve v LATM/LOAS (IEC 61937-11:2010)

Ta del IEC 61937 opisuje metodo za prenos nelinearnih PCM bitnih tokov, kodiranih v skladu z MPEG-4 AAC formatom in njegovimi razširitvami, replikacijo pasu spektra, parametričnega stereo in MPEG prostorskega, znotraj MPEG-4 LATM/LOAS.

General Information

• Status: Withdrawn
• Publication Date: 17-Jun-2010
• Withdrawal Date: 31-May-2013
• ICS: 33.160.30 - Audio systems
• ICS: 33.170 - Television and radio broadcasting
• Technical Committee: CLC/TC 100X - Audio, video and multimedia systems and equipment and related sub-systems
• Drafting Committee: IEC/TC 100 - IEC_TC_100
• Parallel Committee: IEC/TC 100 - IEC_TC_100
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 30-Aug-2023
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 61937-11:2010 - Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 11: MPEG-4 AAC and its extensions in LATM/LOAS (IEC 61937-11:2010)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2010
Digitalni avdio - Vmesnik za nelinearne PCM-kodirane avdio bitne tokove po IEC
60958 - 11. del: MPEG-4 AAC in njegove razširitve v LATM/LOAS (IEC 61937-
11:2010)
Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC
60958 - Part 11: MPEG-4 AAC and its extensions in LATM/LOAS (IEC 61937-11:2010)
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Ta slovenski standard je istoveten z: EN 61937-11:2010
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61937-11
NORME EUROPÉENNE
June 2010
EUROPÄISCHE NORM
ICS 33.160.30; 33.170
English version
Digital audio -
Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 -
Part 11: MPEG-4 AAC and its extensions in LATM/LOAS
(IEC 61937-11:2010)
Audionumérique -  Digitalton – Schnittstelle für nichtlinear-
Interface pour les flux de bits audio PCM-codierte Audio-Bitströme
à codage MIC non linéaire unter Verwendung von IEC 60958 –
conformément à la CEI 60958 - Teil 11: MPEG-4-AAC
Partie 11 : MPEG-4 AAC und dessen Erweiterungen in LATM/LOAS
et ses extensions en LATM/LOAS (IEC 61937-11:2010)
(CEI 61937-11:2010)
This European Standard was approved by CENELEC on 2010-06-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61937-11:2010 E
Foreword
The text of document 100/1491/CDV, future edition 1 of IEC 661937-11, prepared by IEC TC 100, Audio,
video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 61937-11 on 2010-06-01.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2011-03-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2013-06-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61937-11:2010 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61937 series NOTE  Harmonized in EN 61937 series (not modified).
IEC 61937-6 NOTE  Harmonized as EN 61937-6.
__________
- 3 - EN 61937-11:2010
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60958 Series Digital audio interface EN 60958 Series

IEC 61937-1 - Digital audio - Interface for non-linear PCM EN 61937-1 -
encoded audio bitstreams
applying IEC 60958 -
Part 1: General
IEC 61937-2 - Digital audio - Interface for non-linear PCM EN 61937-2 -
encoded audio bitstreams
applying IEC 60958 -
Part 2: Burst-info
ISO/IEC 14496-3 2009 Information technology - Coding of audio-- -
visual objects -
Part 3: Audio
IEC 61937-11 ®
Edition 1.0 2010-05
INTERNATIONAL
STANDARD
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
IEC 60958 –
Part 11: MPEG-4 AAC and its extensions in LATM/LOAS

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
P
ICS 33.160.30; 33.170 ISBN 978-2-88910-933-3
– 2 – 61937-11 © IEC:2010(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms, definitions and abbreviations .6
3.1 Terms and definitions .6
3.2 Abbreviations .8
4 Mapping of the audio bit stream on to IEC 61937-1 .8
4.1 General .8
4.2 Burst-info for MPEG-4 AAC and its extensions in LATM/LOAS .8
5 Format of data-burst for MPEG-4 AAC and its extensions in LATM/LOAS.9
5.1 General .9
5.2 Pause data-bursts for MPEG-4 AAC and its extensions in LATM/LOAS .9
5.3 Audio data-bursts .10
5.3.1 MPEG-4 AAC and its extensions in LATM/LOAS.10
5.3.2 LATM/LOAS framing.12
5.3.3 Latency .12
Annex A (informative) Calculation of delay and data-burst repetition rates, guidelines .14
Bibliography.16

Figure 1 – Data-burst structure .10
Figure 2 – Latency diagram for burst reception and decoding .13

Table 1 – Values for data-type and sub-data-type .9
Table 2 – Repetition period of pause data-bursts .9
Table 3 – Data-type-dependent information .11
Table A.1 – Examples – Calculation of delay and data-burst repetition rates.14

61937-11 © IEC:2010(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 11: MPEG-4 AAC and its extensions in LATM/LOAS

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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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 61937-11 has been prepared by technical area 4: Digital system
interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia
systems and equipment.
The text of this standard is based on the following documents:
CDV Report on voting
100/1491/CDV 100/1580/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.

– 4 – 61937-11 © IEC:2010(E)
A list of all parts of IEC 61937, 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 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.
A bilingual version of this publication may be issued at a later date.

61937-11 © IEC:2010(E) – 5 –
INTRODUCTION
Modern digital video broadcasting standards such as DVB include support for the MPEG-4
HE AAC and/or HE AAC v2 audio codecs as specified in ISO/IEC 14496-3. An increasing
number of countries are adopting these new codecs for their standard definition and high
definition digital video broadcasting services and have started with implementations.
For MPEG-2 AAC audio (ISO/IEC 13818-7) the specified framing format for the audio bit
stream is ADTS and its transport over an IEC 60958 interface is specified in IEC 61937-6.
However, the MPEG-4 (ISO/IEC 14496-3) audio codecs i
...