IEC 62365:2009

Digital audio - Digital input-output interfacing - Transmission of digital audio over asynchronous transfer mode (ATM) networks

IEC 62365:2009 specifies a means to carry multiple channels of audio in linear PCM or IEC 60958-4 format over an ATM layer service conforming to ITU-T Recommendation I.150. It includes a means to convey, between parties, information concerning the digital audio signal when setting up audio calls across the ATM network. This bilingual version (2012-08) corresponds to the monolingual English version, published in 2009. This second edition of IEC 62365 cancels and replaces the first edition published in 2004.The main changes with respect to the previous edition (2004) are: second, third, and fourth required formats in 4.3 removed. 4.3 reformatted, eliminating Table 2, and subsequent Tables renumbered.

Audionumérique - Interface numérique d'entrée-sortie - Transmission de l'audionumérique sur les réseaux à mode de transfert asynchrone (ATM)

La CEI 62365:2009 spécifie un moyen de transporter plusieurs canaux audio dans un format MIC ou CEI 60958-4 sur un service de couche ATM conforme à la Recommandation UIT-T I.150. Elle inclut un moyen d'acheminer, entre les participants, des informations concernant le signal audionumérique lors de l'établissement d'appels audio à travers le réseau ATM. La présente version bilingue (2012-08) correspond à la version anglaise monolingue publiée en 2009. Cette seconde édition de la CEI 62365 annule et remplace la première édition parue en 2004. Les principales modifications par rapport à l'édition précédente (2004) sont: la suppression des deuxième, troisième et quatrième formats requis en 4.3. et le reformatage de 4.3, la suppression du Tableau 2 et la renumérotation des tableaux ultérieurs.

General Information

• Status: Published
• Publication Date: 12-May-2009
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.160.25 - Television receivers
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: PPUB - Publication issued
• Start Date: 31-May-2009
• Completion Date: 13-May-2009

Relations

• Revises: IEC 62365:2004 - Digital audio - Digital input-output interfacing - Transmission of digital audio over asynchronous transfer mode (ATM) networks
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62365 ®
Edition 2.0 2009-05
INTERNATIONAL
STANDARD
Digital audio – Digital input-output interfacing – Transmission of digital audio
over asynchronous transfer mode (ATM) networks

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.

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International Standards for all electrical, electronic and related technologies.

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IEC 62365 ®
Edition 2.0 2009-05
INTERNATIONAL
STANDARD
Digital audio – Digital input-output interfacing – Transmission of digital audio
over asynchronous transfer mode (ATM) networks

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
U
ICS 35.200, 33.160 ISBN 978-2-88910-683-7
– 2 – 62365 © IEC:2009(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.8
2 Normative references .8
3 Terms and definitions .8
4 Format of audio data in ATM cells .10
4.1 Format of audio samples .10
4.1.1 Subframes.10
4.1.2 Audio sample word .10
4.1.3 Ancillary data .10
4.1.4 Protocol overhead .10
4.2 Packing of sample data into cells .12
4.2.1 Packing schemes .12
4.2.2 Temporal grouping .12
4.2.3 Multi-channel.12
4.2.4 Grouping by channel.13
4.3 Formats.13
4.4 ATM adaptation layer .13
4.5 ATM-user-to-ATM-user indication .13
5 Switched virtual circuits .14
5.1 Addresses .14
5.2 Audio call connection: SETUP and ADD PARTY messages .14
5.2.1 Restrictions on connection requests .14
5.2.2 Information elements in the SETUP and ADD PARTY messages .14
5.2.3 Destination response to SETUP and ADD PARTY messages.15
5.3 Call disconnection .16
6 Coding of audio formats .16
6.1 Qualifying information.16
6.2 Subframe format.17
6.3 Packing of subframes into cells .17
6.4 Sampling frequency.18
7 Permanent virtual circuits .18
8 Management interface .19
8.1 Call connection: SETUP messages .19
8.1.1 Restrictions on connection requests .19
8.1.2 Information elements in the SETUP message .19
8.1.3 Destination response to SETUP message.20
8.2 Message encapsulation .20
8.3 Message format and action to be taken by recipient .20
8.4 Message types .21
8.4.1 Messages sent from the controlling entity .21
8.4.2 Messages sent to the controlling entity .23
8.4.3 Vendor-specific messages.25
Annex A (informative) Data protection.26
Annex B (informative) Application identifier values.28

62365 © IEC:2009(E) – 3 –
Bibliography.29

Table 1 – Fields contained in a subframe.10
Table 2 – Default port number and packing for certain VCIs.19
Table 3 – Status enquiry message .21
Table 4 – Audio connection request message .22
Table 5 – Audio disconnection request message.22
Table 6 – Input port status message .23
Table 7 – Output port status message.24
Table 8 – Other status messages.25
Table 9 – Vendor-specific messages.25
Table A.1 – Sequence number protection field values .26
Table B.1 – Application identifier (octets 9 to 12) values in the BHLI IE .28

– 4 – 62365 © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
DIGITAL AUDIO –
DIGITAL INPUT-OUTPUT INTERFACING –
TRANSMISSION OF DIGITAL AUDIO OVER
ASYNCHRONOUS TRANSFER MODE (ATM) NETWORKS

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.
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International Standard IEC 62365 has been prepared by technical area 4: Digital systems
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:
FDIS Report on voting
100/1517/FDIS 100/1550/RVD
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.

62365 © IEC:2009(E) – 5 –
The main changes with respect to the previous edition (2004) are listed below.
– Second, third, and fourth required formats in 4.3 removed.
– 4.3 reformatted, eliminating Table 2, and subsequent Tables renumbered.
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 publication may be issued at a later date.

– 6 – 62365 © IEC:2009(E)
INTRODUCTION
This International Standard describes means for the transmission of professional audio across
digital networks, including metropolitan- and wide-area networks, to provide the best
performance with regard to latency, jitter, and other relevant factors.
Current-generation wide-area communications are based on two very similar systems,
synchronous optical network (SONET) and synchronous digital hierarchy (SDH), SONET being
used in the United States and SDH in Europe. On top of them are run int
...

IEC 62365 ®
Edition 2.0 2009-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Digital input-output interfacing – Transmission of digital audio
over asynchronous transfer mode (ATM) networks

Audionumérique – Interface numérique d’entrée-sortie – Transmission de
l’audionumérique sur les réseaux à mode de transfert asynchrone (ATM)

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.

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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.: [phone]
3, rue de Varembé Fax: [phone]
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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.

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IEC 62365 ®
Edition 2.0 2009-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Digital input-output interfacing – Transmission of digital audio

over asynchronous transfer mode (ATM) networks

Audionumérique – Interface numérique d’entrée-sortie – Transmission de

l’audionumérique sur les réseaux à mode de transfert asynchrone (ATM)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 35.200, 33.160 ISBN 978-2-83220-241-8

– 2 – 62365  IEC:2009
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Format of audio data in ATM cells . 10
4.1 Format of audio samples . 10
4.1.1 Subframes . 10
4.1.2 Audio sample word . 10
4.1.3 Ancillary data . 10
4.1.4 Protocol overhead . 10
4.2 Packing of sample data into cells . 12
4.2.1 Packing schemes . 12
4.2.2 Temporal grouping . 12
4.2.3 Multi-channel . 12
4.2.4 Grouping by channel. 13
4.3 Formats . 13
4.4 ATM adaptation layer . 13
4.5 ATM-user-to-ATM-user indication . 13
5 Switched virtual circuits . 14
5.1 Addresses . 14
5.2 Audio call connection: SETUP and ADD PARTY messages . 14
5.2.1 Restrictions on connection requests . 14
5.2.2 Information elements in the SETUP and ADD PARTY messages . 14
5.2.3 Destination response to SETUP and ADD PARTY messages . 15
5.3 Call disconnection . 16
6 Coding of audio formats . 16
6.1 Qualifying information. 16
6.2 Subframe format. 17
6.3 Packing of subframes into cells . 17
6.4 Sampling frequency . 18
7 Permanent virtual circuits . 18
8 Management interface . 19
8.1 Call connection: SETUP messages . 19
8.1.1 Restrictions on connection requests . 19
8.1.2 Information elements in the SETUP message . 19
8.1.3 Destination response to SETUP message . 20
8.2 Message encapsulation . 20
8.3 Message format and action to be taken by recipient . 20
8.4 Message types . 21
8.4.1 Messages sent from the controlling entity . 21
8.4.2 Messages sent to the controlling entity . 23
8.4.3 Vendor-specific messages . 25
Annex A (informative) Data protection . 26
Annex B (informative) Application identifier values . 28

62365  IEC:2009 – 3 –
Bibliography . 29

Table 1 – Fields contained in a subframe . 10
Table 2 – Default port number and packing for certain VCIs . 19
Table 3 – Status enquiry message . 21
Table 4 – Audio connection request message . 22
Table 5 – Audio disconnection request message . 22
Table 6 – Input port status message . 23
Table 7 – Output port status message . 24
Table 8 – Other status messages . 25
Table 9 – Vendor-specific messages . 25
Table A.1 – Sequence number protection field values . 26
Table B.1 – Application identifier (octets 9 to 12) values in the BHLI IE . 28

– 4 – 62365  IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
DIGITAL AUDIO –
DIGITAL INPUT-OUTPUT INTERFACING –
TRANSMISSION OF DIGITAL AUDIO OVER
ASYNCHRONOUS TRANSFER MODE (ATM) NETWORKS

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 procedur
...