Digital audio interface - Part 3: Consumer applications

IEC 60958-3:2009:2006+A1:2009 specifies the consumer application of the interface for the interconnection of digital audio equipment defined in IEC 60958-1. This consolidated version consists of the third edition (2006) and its amendment 1 (2009). Therefore, no need to order amendment in addition to this publication.

Interface audionumérique - Partie 3: Applications grand public

L'IEC 60958-3:2006+A1:2009 spécifie une application grand public del'interface pour l'interconnexion des appareils audionumériques définie dans la CEI 60958-1.  Cette version consolidée comprend la troisième édition (2006) et son amendement 1 (2009). Il n'est donc pas nécessaire de commander l'amendement avec cette publication.

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Edition 3.1 2009-10
CONSOLIDATED
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Digital audio interface –
Part 3: Consumer applications

Interface audionumérique –
Partie 3: Applications grand public

IEC 60958-3:2006-05+AMD1:2009-10 CSV(en-fr)

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IEC 60958-3

®


Edition 3.1 2009-10





CONSOLIDATED



VERSION




VERSION



CONSOLIDÉE
colour

inside










Digital audio interface –

Part 3: Consumer applications




Interface audionumérique –

Partie 3: Applications grand public
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

INTERNATIONALE



ICS 33.160.01 ISBN 978-2-8322-1754-2



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IEC 60958-3
®


Edition 3.1 2009-10

REDLINE VERSION
VERSION REDLINE
colour
inside


Digital audio interface –
Part 3: Consumer applications

Interface audionumérique –
Partie 3: Applications grand public

IEC 60958-3:2006-05+AMD1:2009-10 CSV(en-fr)

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– 2 – IEC 60958-3:2006
 +AMD1:2009 CSV © IEC 2014
CONTENTS
FOREWORD . 5
INTRODUCTION to Amendment 1 . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Interface format . 8
5 Channel status . 9
5.1 General . 9
5.2 Application . 9
5.3 Copyright management guidelines for consumer application of the digital
audio interface . 16
6 User data . 20
6.1 General . 20
6.2 Application . 20
6.3 Information for synchronization . 24

Annex A (normative) Application of the digital audio interface in the compact disc
digital audio system . 27
Annex B (normative) Application of the digital interface in the 2-channel PCM
encoder/decoder . 29
Annex C (normative) Application of the digital interface in the 2-channel digital audio
tape recorder in the consumer mode . 30
Annex D (normative) Application of the digital interface in laser optical digital audio
systems for which no other category code is defined. 34
Annex E (normative) Application of the digital interface in a digital audio mixer in the
consumer mode . 35
Annex F (normative) Application of the digital interface with a sampling rate converter
in the consumer mode. 36
Annex G (normative) Application of the digital interface with a digital sound sampler
in the consumer mode. 37
Annex H (normative) Application of the digital interface in a digital broadcast receiver
(Japan) in the consumer mode . 38
Annex J (normative) Application of the digital interface in a digital broadcast receiver
(Europe) in the consumer mode . 39
Annex K (normative) Application of the digital interface in a digital broadcast receiver
(USA) in the consumer mode . 40
Annex L (normative) Application of the digital interface for electronic software delivery
in the consumer mode. 41
Annex M (normative) Application of the digital interface in the digital compact cassette
system in the consumer mode . 42
Annex N (normative) Application of the digital interface in the mini-disc system in the
consumer mode . 47
Annex O (normative) Application of the digital interface in a digital sound processor in
the consumer mode . 48
Annex P (normative) Application of the digital interface in the digital versatile disc
system (DVD) in the consumer mode . 49

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IEC 60958-3:2006 – 3 –
+AMD1:2009 CSV © IEC 2014
Annex Q (informative) Use of original sampling frequency, sampling frequency and
clock accuracy . 50
Annex R (normative) Application of the digital interface in magnetic disc digital audio
systems in the consumer mode . 52
Annex S (normative) Explanations of category code implementation . 53
Annex T (informative) Application of the digital audio interface for synchronization of
audio, video and multi-media equipments . 58
Annex U (normative) MPEG Surround over PCM . 64
Bibliography . 66

Figure 1 – Example of message structure using information units . 21
Figure 2 – First UI contents . 22
Figure 3 – Second UI contents . 22
Figure 4 – Third UI contents . 23
Figure 5 – User information. 23
Figure 6 – SMPTE time code information . 24
Figure 7 – LTC information alignment . 24
Figure 8 – VITC information alignment . 25
Figure 9 – Latency information . 25
Figure 10 – Latency information alignment . 26
Figure C.1 – Example of different combinations of start-ID and shortening-ID . 33
Figure M.1 – Marker mode . 42
Figure M.2 – Extended mode . 43
Figure Q.1 – Player and interface model . 50
Figure S.1 – Multi-media player . 53
Figure S.2 – Home-recorded medium player . 54
Figure S.3 – Direct monitoring . 54
Figure S.4 – Monitoring after recording . 55
Figure S.5 – Integrated product . 55
Figure S.6 – Digital/digital converter . 56
Figure S.7 – Integrated product including digital/digital converter . 56
Figure S.8 – Integrated product including magnetic disc recorder . 57
Figure T.1 – Lip-sync system model . 58
Figure T.2 – Lip-sync compensation . 59
Figure T.3 – Time-code transmission . 59
Figure T.4 – Latency parameter transmission . 60
Figure T.5 – Latency parameter transmission with TLv. 60
Figure T.6 – Example of latency parameter transmission . 62
Figure T.7 – Another example for solving lip-sync problems . 63
Figure U.1 – Relations between MPEG Surround buried data frame and
IEC 60958-3 frame. 64

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 +AMD1:2009 CSV © IEC 2014
Table 1– Channel status general format for consumer use . 10
Table 2 – Mode 0 channel status format for consumer use . 12
Table 3 – Category code groups . 17
Table 4 – Category code groups for laser optical products . 18
Table 5 – Category code groups for digital/digital converter and signal-processing
products . 18
Table 6 – Category code groups for magnetic tape or magnetic disc based products . 18
Table 7 – Category code groups for broadcast reception of digitally encoded audio
with/without video signals . 19
Table 8 – Category code groups for musical instruments, microphones and other
sources that create original sound . 19
Table 9 – Category code groups for A/D converters for analogue signals without
copyright information . 19
Table 10 – Category code groups for A/D converters for analogue signals with
copyright information . 20
Table 11 – Category code groups for solid-state memory-based products . 20
Table A.1 – Example of 2-channel compact disc format . 28
Table C.1 – Use of Cp-bit, L-bit and category code for DAT . 30
Table C.2 – User data application in the DAT system . 32
Table M.1 – Layout of message number “000000” . 43
Table M.2 – Deck status codes . 44
Table M.3 – ITTS packet extended message example . 45
Table Q.1 – Term definitions . 50
Table Q.2 – Cases . 51
Table Q.3 – Example . 51

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IEC 60958-3:2006 – 5 –
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

DIGITAL AUDIO INTERFACE –

Part 3: Consumer applications


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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Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
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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
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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.
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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.
This Consolidated version of IEC 60958-3 bears the edition number 3.1. It consists of
the third edition (2006-05) [documents 100/1009/CDV and 100/1070/RVC] and its
amendment 1 (2009-10) [documents 100/1513/CDV and 100/1592/RVC]. The technical
content is identical to the base edition and its amendment.
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions and deletions are displayed in red, with
deletions being struck through. A separate Final version with all changes accepted is
available in this publication.
This publication has been prepared for user convenience.

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– 6 – IEC 60958-3:2006
 +AMD1:2009 CSV © IEC 2014
International Standard IEC 60958-3 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
This edition includes the following significant technical changes with respect to the previous
edition.
– Electrical and optical requirements are removed from IEC 60958-3; they should be
specified in IEC 60958-1. The third edition of IEC 60958-1 will include these.
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 60958 series, under the general title Digital audio interface,
can be found on the IEC website.
The committee has decided that the contents of the base publication and its amendment 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 publication using a colour printer.

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IEC 60958-3:2006 – 7 –
+AMD1:2009 CSV © IEC 2014
INTRODUCTION to Amendment 1
The revision of IEC 60958-3 (2006) has become necessary to transmit the audio signal and its
information of the current improved audio formats and systems. The revised items apply to the
small parts of IEC 60958-3.
Additional sampling frequencies have been defined for the use of audio transmission of
IEC 60958 conformant data format for the new formats of the IEC 61937 series.
CGMS-A validity is added to clarify the use of CGMS-A information.
The identification of the embedded MPEG Surround information to LPCM and its normative
Annex U are added.
Table 2 includes the new additions and Table 3 has been clarified.

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 +AMD1:2009 CSV © IEC 2014
DIGITAL AUDIO INTERFACE –

Part 3: Consumer applications



1 Scope
This part of IEC 60958 specifies the consumer application of the interface for the inter-
connection of digital audio equipment defined in IEC 60958-1.
NOTE When used in a consumer digital processing environment, the interface is primarily intended to carry
stereophonic programmes, with a resolution of up to 20 bits per sample, an extension to 24 bits per sample being
possible.
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 60841:1988, Audio recording – PCM encoder/decoder system
IEC 60908:1999, Audio recording – Compact disc digital audio system
IEC 60958-1:2004, Digital audio interface – Part 1: General
IEC 61119-1:1992, Digital audio tape cassette system (DAT) – Part 1: Dimensions and
characteristics
IEC 61119-6:1992, Digital audio tape cassette system (DAT) – Part 6: Serial copy
management system
IEEE 1394:2004, IEEE standard for high-performance serial bus bridges
ISO/IEC 23003-1, Information technology – MPEG audio technologies – Part 1: MPEG
Surround
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60958-1 apply.
4 Interface format
The interface format as defined in IEC 60958-1 shall be used.
Unless otherwise specified in the annexes, the following specification is applicable.
• Audio sample word has a length of 20 bits/sample. The auxiliary sample bits are an
optional expansion of the audio sample, if not used = “0”.
• User data is not used, all bits = “0”.
• Channel status is identical for both subframes of the interface, with the exception of the
channel number, if that is not equal to zero.

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IEC 60958-3:2006 – 9 –
+AMD1:2009 CSV © IEC 2014
5 Channel status
5.1 General
For every subframe, the channel status bit provides information related to the audio channel
that is carried in that same subframe.
Channel status information is organized in a 192-bit block, subdivided into 24 bytes,
numbered 0 to 23 (see Table 1). The first bit of each channel status block is carried in the
frame with preamble “B”.
The individual bits of a channel status block are numbered 0 to 191.
The primary application is indicated by channel status bit 0.
As stated in IEC 60958-1, for the consumer digital audio applications described in this
standard, this first channel status bit equals “0”.
NOTE As stated in IEC 60958-1, for professional application this first channel status bit equals “1”.
Secondary applications may be defined within the framework of these primary applications.
5.2 Application
5.2.1 Channel status general format
For each channel, the channel status block provides the information described in this clause
and summarized in Table1.

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 +AMD1:2009 CSV © IEC 2014
Table 1– Channel status general format for consumer use
Byte
0 a = “0” b c d Mode
bit 0 1 2 3 4 5 6 7
1
bit 8 9 10 11 12 13 14 15
2
bit 16 17 18 19 20 21 22 23
3
 bit 24 25 26 27 28 29 30 31
4
bit 32 33 34 35 36 37 38 39
5
bit 40 41 42 43 44 45 46 47
6
bit 48 49 50 51 52 53 54 55
7
bit 56 57 58 59 60 61 62 63
...

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