IEC 61937-7:2004

Digital audio - Interface for non-linear PCM encoded audio bitstreams applying to IEC 60958 - Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X formats

IEC 61937-7:2004 specifies the method for the digital audio interface specified in IEC 60958 to convey non-linear PCM bitstreams encoded in accordance with the ATRAC, ATRAC2/3 and ATRAC-X formats. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. This edition includes the following significant technical changes: In this edition, a new audio data-type of ATRAC-X is added to ATRAC and ATRAC2/3. Specific properties such as reference points, repetition period, the method of filling stream gaps, and decoding latency are specified for data-type of ATRAC-X.

Audionumérique - Interface pour les flux de bits audio à codage MIC non linéaire conformément à la CEI 60958 - Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et ATRAC-X

La CEI 61937-7:2004 spécifie la méthode pour l'interface audionumérique spécifiée dans la CEI 60958 pour acheminer des flux de bits MIC non linéaire codés selon les formats ATRAC, ATRAC2/3 et ATRAC-X. La présente deuxième édition annule et remplace la première édition parue en 2002. Cette édition constitue une révision technique. Elle contient les importantes modifications techniques suivantes: Dans cette édition, un nouveau type de données audio au format ATRAC-X est ajouté au aux formats ATRAC et ATRAC2/3. Les caractéristiques particulières, telles que les points de référence, la période de répétition, la méthode pour combler les intervalles entre flux et le temps de latence du décodage, sont spécifiées pour le type de données ATRAC-X.

General Information

• Status: Published
• Publication Date: 23-Nov-2004
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: PPUB - Publication issued
• Start Date: 30-Nov-2004
• Completion Date: 24-Nov-2004

Relations

• Amended By: IEC 61937-7:2004/AMD1:2016 - Amendment 1 - Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X formats
• Effective Date: 05-Sep-2023
• Revises: IEC 61937-7:2002 - Digital audio - Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 - Part 7: Non-linear PCM bitstreams according to the ATRAC and ATRAC2/3 formats
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61937-7
Second edition
2004-11
Digital audio –
Interface for non-linear PCM encoded
audio bitstreams applying IEC 60958 –
Part 7:
Non-linear PCM bitstreams according to
the ATRAC, ATRAC2/3 and ATRAC-X 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
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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:
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• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
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INTERNATIONAL IEC
STANDARD 61937-7
Second edition
2004-11
Digital audio –
Interface for non-linear PCM encoded
audio bitstreams applying IEC 60958 –
Part 7:
Non-linear PCM bitstreams according to
the ATRAC, ATRAC2/3 and ATRAC-X formats
 IEC 2004  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: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale M
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61937-7  IEC:2004(E)
CONTENTS
FOREWORD.3

1 Scope.5
2 Normative references .5
3 Terms, definitions and abbreviations .5
3.1 Definitions .5
3.2 Abbreviations .5
4 Mapping of the audio bitstream on to IEC 61937 .6
4.1 General .6
4.2 ATRAC, ATRAC2/3 and ATRAC-X burst-info .6
5 Format of ATRAC, ATRAC2/3 and ATRAC-X data-bursts .6
5.1 General .6
5.2 Audio data-bursts .7
5.2.1 The data ATRAC .7
5.2.2 Latency of ATRAC decoding.8
5.2.3 The data ATRAC2/3 .8
5.2.4 Latency of ATRAC2/3 decoding .9
5.2.5 The data ATRAC-X .10
5.2.6 Latency of ATRAC-X decoding .11

Bibliography.12

Figure 1 – ATRAC data-burst.7
Figure 2 – Latency of ATRAC decoding .8
Figure 3 – ATRAC2/3 data-burst .9
Figure 4 – Latency of ATRAC2/3 decoding.10
Figure 5 – ATRAC-X data-burst .10

Table 1 – Fields of burst-info .6
Table 2 – Data-type-dependent information for data-type ATRAC .7
Table 3 – Data-type-dependent information for data-type ATRAC2/3 .9
Table 4 – Data-type-dependent information for data-type ATRAC-X.11

61937-7  IEC:2004(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 7: Non-linear PCM bitstreams according to
the ATRAC, ATRAC2/3 and ATRAC-X 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 61937-7 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 cancels and replaces the first edition published in 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) In this edition, a new audio data-type of ATRAC-X is added to ATRAC and ATRAC2/3.
b) Specific properties such as reference points, repetition period, the method of filling stream
gaps, and decoding latency are specified for data-type of ATRAC-X.

– 4 – 61937-7  IEC:2004(E)
The text of this standard is based on the following documents:
CDV Report on voting
100/752/CDV 100/834/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, undert 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 PCM 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 format
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X formats
(TA4)
Part 8: Non-linear PCM bitstreams according to the Windows Media Audio Professional
(TA4)
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 standard may be issued at a later date.
———————
Under consideration.
61937-7  IEC:2004(E) – 5 –
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 7: Non-linear PCM bitstreams according to
the ATRAC, ATRAC2/3 and ATRAC-X formats

1 Scope
This part of IEC 61937 specifies the method for the digital audio interface specified in
IEC 60958 to convey non-linear PCM bitstreams encoded in accordance with the ATRAC,
ATRAC2/3 and ATRAC-X 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 60958-1, Digital audio interface – Part 1: General
IEC 60958-3, Digital audio interface – Part 3: Consumer applications
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
3 Terms, definitions and abbreviations
3.1 Definitions
For the purposes of this document, the definitions given in IEC 61937-1 and IEC 61937-2, as
well as the following, apply.
3.1.1
latency
delay time of an external audio decoder to decode an ATRAC, ATRAC2/3 and ATRAC-X data-
burst, defined as the sum of two values of the receiving delay time and the decoding delay
time
3.2 Abbreviations
ATRAC Adaptive TRansform Acoustic Coding
ATRAC2 Adaptive TRansform Acoustic Coding 2
ATRAC3 Adaptive TRansform Acoustic Coding 3
ATRAC2/3 ATRAC2 and/or ATRAC3
ATRAC-X Adaptive TRansform Acoustic Coding-X

– 6 – 61937-7  IEC:2004(E)
4 Mapping of the audio bitstream on to IEC 61937
4.1 General
The coding of the bitstream and data-burst shall be in accordance with IEC 61937-1 and
IEC 61937-2.
4.2 ATRAC, ATRAC2/3 and ATRAC-X burst-info
This 16-bit burst-info shall contain data-burst information structured in accordance with
Table 1.
Table 1 – Fields of burst-info
Repetition period
Reference point
Bits of Pc Value Contents
of data-burst in
R
IEC 60958 frames
0-4 data-type
0-13 in accordance with IEC 61937-1 and
IEC 61937-2
14 ATRAC bit 0 of Pa 512
15 ATRAC2/3 bit 0 of Pa 1 024
16 ATRAC-X Sub-data-type Sub-data-type
dependent dependent
17-31 in accordance with IEC 61937-2
5, 6 00 Reserved in ATRAC and ATRAC2/3
formats
00 Sub-data-type for ATRAC-X bit 0 of Pa 2 048
01 , 10 , 11 Reserved for sub-data-type in
...

IEC 61937-7 ®
Edition 2.0 2004-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
to IEC 60958 –
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and
ATRAC-X formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à la CEI 60958 –
Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et
ATRAC-X
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
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IEC 61937-7 ®
Edition 2.0 2004-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying

to IEC 60958 –
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and

ATRAC-X formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non

linéaire conformément à la CEI 60958 –

Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et

ATRAC-X
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX M
ICS 33.160.01 ISBN 978-2-83220-524-2

– 2 – 61937-7  IEC:2004
CONTENTS
FOREWORD . 3

1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviations . 5
3.1 Definitions . 5
3.2 Abbreviations . 5
4 Mapping of the audio bitstream on to IEC 61937 . 6
4.1 General . 6
4.2 ATRAC, ATRAC2/3 and ATRAC-X burst-info . 6
5 Format of ATRAC, ATRAC2/3 and ATRAC-X data-bursts . 6
5.1 General . 6
5.2 Audio data-bursts . 7
5.2.1 The data ATRAC . 7
5.2.2 Latency of ATRAC decoding . 8
5.2.3 The data ATRAC2/3 . 8
5.2.4 Latency of ATRAC2/3 decoding . 9
5.2.5 The data ATRAC-X . 10
5.2.6 Latency of ATRAC-X decoding . 11

Bibliography . 13

Figure 1 – ATRAC data-burst . 7
Figure 2 – Latency of ATRAC decoding . 8
Figure 3 – ATRAC2/3 data-burst . 9
Figure 4 – Latency of ATRAC2/3 decoding . 10
Figure 5 – ATRAC-X data-burst . 10
Figure 6 – Latency of ATRAC-X decoding . 11

Table 1 – Fields of burst-info . 6
Table 2 – Data-type-dependent information for data-type ATRAC . 7
Table 3 – Data-type-dependent information for data-type ATRAC2/3 . 9
Table 4 – Data-type-dependent information for data-type ATRAC-X . 11

61937-7  IEC:2004 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –

Part 7: Non-linear PCM bitstreams according to
the ATRAC, ATRAC2/3 and ATRAC-X 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 61937-7 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 cancels and replaces the first edition published in 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) In this edition, a new audio data-type of ATRAC-X is added to ATRAC and ATRAC2/3.
b) Specific properties such as reference points, repetition period, the method of filling stream
gaps, and decoding latency are specified for data-type of ATRAC-X.

– 4 – 61937-7  IEC:2004
This bilingual version (2012-12) corresponds to the monolingual English version, published in
2004-11.
The text of this standard is based on the following documents:
CDV Report on voting
100/752/CDV 100/834/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.
IEC 61937 consists of the following parts, undert 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 PCM 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 format
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and ATRAC-X
formats (TA4)
Part 8: Non-linear PCM bitstreams according to the Windows Media Audio Professional
...

IEC 61937-7 ®
Edition 2.1 2016-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
to IEC 60958 –
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and
ATRAC-X formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à l’IEC 60958 –
Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et
ATRAC-X
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.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
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
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IEC 61937-7 ®
Edition 2.1 2016-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying

to IEC 60958 –
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and

ATRAC-X formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non

linéaire conformément à l’IEC 60958 –

Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et

ATRAC-X
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160.01 ISBN 978-2-8322-3415-0

IEC 61937-7 ®
Edition 2.1 2016-05
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Digital audio – Interface for non-linear PCM encoded audio bitstreams applying
to IEC 60958 –
Part 7: Non-linear PCM bitstreams according to the ATRAC, ATRAC2/3 and
ATRAC-X formats
Audionumérique – Interface pour les flux de bits audio à codage MIC non
linéaire conformément à l’IEC 60958 –
Partie 7: Flux de bits MIC non linéaire selon les formats ATRAC, ATRAC2/3 et
ATRAC-X
– 2 – IEC 61937-7:2004+AMD1:2016 CSV
 IEC 2016
CONTENTS
FOREWORD. 3
INTRODUCTION to Amendment 1 . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 Mapping of the audio bitstream on to IEC 61937 . 7
4.1 General . 7
4.2 ATRAC, ATRAC2/3 and ATRAC-X burst-info . 7
5 Format of ATRAC, ATRAC2/3 and ATRAC-X data-bursts . 7
5.1 General . 7
5.2 Audio data-bursts . 7
5.2.1 The data ATRAC . 7
5.2.2 Latency of ATRAC decoding . 8
5.2.3 The data ATRAC2/3 . 9
5.2.4 Latency of ATRAC2/3 decoding . 10
5.2.5 The data ATRAC-X . 11
5.2.6 Latency of ATRAC-X decoding . 12
Bibliography . 14

Figure 1 – ATRAC data-burst . 8
Figure 2 – Latency of ATRAC decoding . 9
Figure 3 – ATRAC2/3 data-burst . 9
Figure 4 – Latency of ATRAC2/3 decoding . 10
Figure 5 – ATRAC-X data-burst . 11
Figure 6 – Latency of ATRAC-X decoding . 12

Table 1 – Fields of burst-info . 7
Table 2 – Data-type-dependent information for data-type ATRAC. 8
Table 3 – Data-type-dependent information for data-type ATRAC2/3 . 10
Table 4 – Data-type-dependent information for data-type ATRAC-X . 11

 IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO –
INTERFACE FOR NON-LINEAR PCM ENCODED
AUDIO BITSTREAMS APPLYING IEC 60958 –
Part 7: Non-linear PCM bitstreams according to
the ATRAC, ATRAC2/3 and ATRAC-X formats
FOREWORD
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