SIST EN 60958-3:2000

Digital audio interface -- Part 3: Consumer applications

This part of IEC 60958 specifies the  consumer application of the interface for the  interconnection of digital audio equipment  defined in IEC 60958-1.

Digitalton-Schnittstelle -- Teil 3: Allgemeingebrauch

Interface audionumérique -- Partie 3: Applications grand public

Décrit un interface série, unidirectionnelle, autosynchronisante pour l'interconnexion des appareils audionumériques grand public.

Digitalni zvokovni vmesnik – 3. del: Uporaba pri potrošniku (IEC 60958-3:1999)

General Information

• Status: Withdrawn
• Publication Date: 30-Nov-2000
• Withdrawal Date: 30-Nov-2003
• ICS: 33.160.30 - Audio systems
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: EN 60958-3:2000 - Digital audio interface - Part 3: Consumer applications

Relations

• Replaced By: SIST EN 60958-3:2003 - Digital audio interface -- Part 3: Consumer applications
• Effective Date: 06-May-2014
• Replaced By: SIST EN 60958-3:2003 - Digital audio interface -- Part 3: Consumer applications
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60958-3:2000
01-december-2000
Digitalni zvokovni vmesnik – 3. del: Uporaba pri potrošniku (IEC 60958-3:1999)
Digital audio interface -- Part 3: Consumer applications
Digitalton-Schnittstelle -- Teil 3: Allgemeingebrauch
Interface audionumérique -- Partie 3: Applications grand public
Ta slovenski standard je istoveten z: EN 60958-3:2000
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
SIST EN 60958-3:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60958-3:2000

NORME CEI


INTERNATIONALE IEC



60958-3
INTERNATIONAL


Première édition
STANDARD

First edition

1999-12




Interface audionumérique –
Partie 3:
Applications grand public
Digital audio interface –
Part 3:
Consumer applications

 IEC 1999 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photo-copie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
X
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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CONTENTS


Page

FOREWORD . 7


Clause


1 Scope . 11

2 Normative references . 11

3 Interface format. 13

4 Channel status . 13
4.1 General. 13
4.2 Application . 13
4.2.1 Channel status general format. 13
4.2.2 Mode 0 channel status format for digital audio equipment for
consumer use . 19
4.3 Copyright management guidelines for consumer application of the digital
audio interface . 23
4.3.1 General. 23
4.3.2 Category code groups . 25
5 User data . 31
5.1 General. 31
5.2 Application . 31
5.2.1 User data message structure. 31
5.2.2 Equipment classification . 33
5.2.3 User data message length and contents . 35
6 Electrical and optical requirements . 39
6.1 General. 39
6.2 Timing accuracy. 39
6.2.1 Accuracy of sampling frequency (clock accuracy) . 39
6.2.2 Receiver locking range . 39
6.3 Unbalanced line . 39
6.3.1 General characteristics. 39
6.3.2 Line driver characteristics. 41
6.3.3 Line receiver characteristics . 43

6.3.4 Connectors . 45
6.4 Optical connection . 45
Annex A (normative) Application of the digital audio interface in the compact disc digital
audio system . 47
Annex B (normative) Application of the digital interface in the 2-channel pcm
encoder/decoder. 51
Annex C (normative) Application of the digital interface in the 2-channel digital audio
tape recorder in the consumer mode. 53
Annex D (normative) Application of the digital interface in laser optical digital audio
systems for which no other category code is defined . 61
Annex E (normative) Application of the digital interface in digital audio mixers in
the consumer mode . 63
Annex F (normative) Application of the digital interface in a sampling rate converter in
the consumer mode . 65

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Page

Annex G (normative) Application of the digital interface in digital sound samplers in

the consumer mode . 67


Annex H (normative) Application of the digital interface in 2-channel digital broadcast
receivers (Japan) in the consumer mode. 69

Annex J (normative) Application of the digital interface in 2-channel digital broadcast

receivers (Europe) in the consumer mode. 71

Annex K (normative) Application of the digital interface in 2-channel digital broadcast

receivers (USA) in the consumer mode . 73

Annex L (normative) Application of the digital interface in 2-channel electronic software
delivery in the consumer mode . 75
Annex M (normative) Application of the digital interface in the digital compact cassette
system in the consumer mode . 77
Annex N (normative) Application of the digital interface in the mini disc system in
the consumer mode . 87
Annex O (normative) Application of the digital interface in the digital sound processor in
the consumer mode . 89
Figure 1 – Example of message structure using information units. 33
Figure 2 – Simplified example of the configuration of the circuit (unbalanced). 41
Figure 3 – Rise and fall times . 41
Figure 4 – Intrinsic jitter measurement filter . 43
Figure 5 – Eye diagram. 45
Figure 6 – Receiver jitter tolerance template . 45
Figure C.1 – Example of different combinations of start-ID and shortening-ID. 59
Table 1 – Channel status general format for consumer use . 15
Table 2 – Mode 0 channel status format for consumer use . 19
Table 3 – Category code groups . 25
Table 4 – Category code groups for laser optical products . 27
Table 5 – Category code groups for digital/digital converter and signal processing products . 27
Table 6 – Category code groups for magnetic tape or magnetic disc based products . 27
Table 7 – Category code groups for broadcast reception of digitally encoded audio
with/without video signals . 29
Table 8 – Category code groups for musical instruments, microphones and other

sources that create original sound . 29
Table 9 – Category code groups for A/D converters for analogue signals without
copyright information . 29
Table 10 – Category code groups for A/D converters for analogue signals with
copyright information . 31
Table 11 – Category code groups for solid state memory based products . 31
Table A.1 – Example of 2-channel compact disc format . 49
Table C.1 – Use of Cp-bit, L-bit and category code for DAT. 55
Table C.2 – User data application in the DAT system . 57
Table M.1 – Deck status codes . 81

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INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________


DIGITAL AUDIO INTERFACE –


Part 3: Consumer applications



FOREWORD

1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard 60958-3 has been prepared by subcommittee 100C: Audio, video and
multimedia subsystems and equipment, 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
100C/248/FDIS 100C/254/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 3.
IEC 60958 consists of the following parts under the general title: Digital audio interface:
Part 1: General
Part 2 (TR): Software information delivery mode
Part 3: Consumer applications
Part 4: Professional applications
Annexes A to O form an integral part of this standard.

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The committee has decided that this publication remains valid until 2003.


At this date, in accordance with the committee’s decision, the publication will be


• reconfirmed;

• withdrawn;

• replaced by a revised edition, or

• amended.

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DIGITAL AUDIO INTERFACE –


Part 3: Consumer applications



1 Scope


This International Standard describes an application of a serial, uni-directional, self-clocking

interface as defined in IEC 60958-1, for the interconnection of digital audio equipment for

consumer applications.

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 normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60268-11:1987, Sound system equipment – Part 11: Application of connectors for the
interconnection of sound system components
IEC 60841:1988, Audio recording – PCM encoder/decoder system
IEC 60908:1999, Audio recording – Compact disc digital audio system
IEC 60958-1:1999, Digital audio interface – Part 1: General
IEC 60958-4:1999, Digital audio interface – Part 4: Professional applications
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

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3 Interface format


The interface format as defined in IEC 60958-1 shall be used.


4 Channel status


4.1 General


For every sub-frame, the channel status provides information related to the audio channel that

is carried in that same sub-frame.
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 block is carried in the frame with preamble “B”.
The individual bits of a block are numbered 0 to 191.
The primary application is indicated by channel status bit 0.
As stated in IEC 60958-1, for professional application this first channel status bit equals “1”.
For the consumer digital audio applications described in this standard, this first channel status
bit equals “0”.
Secondary applications may be defined within the framework of these primary applications.
4.2 Application
4.2.1 Channel status general format
For each channel, channel status is used for the following information.

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Table 1 – Channel status general format for consumer use


Byte

 0 a = “0” b c d Mode

bit 0 12 34 5 6 7

 1

bit 8 9 1011 121314 15

 2

bit 1617 1819 202122 23

 3

bit 2425 2627 282930 31
 4
bit 3233 3435 363738 39
 5
bit 4041 4243 444546 47
 6
bit 4849 5051 525354 55
 7
bit 5657 5859 606162 63
 8
bit 6465 6667 686970 71
 9
bit 7273 7475 767778 79
10
bit 8081 8283 848586 87
11
bit 8889 9091 929394 95
12
bit 96 97 98 99 100 101 102 103
13
bit 104 105 106 107 108 109 110 111
14
bit 112 113 114 115 116 117 118 119
15
bit 120 121 122 123 124 125 126 127
16
bit 128 129 130 131 132 133 134 135
17
bit 136 137 138 139 140 141 142 143
18
bit 144 145 146 147 148 149 150 151
19

bit 152 153 154 155 156 157 158 159
20
bit 160 161 162 163 164 165 166 167
21
bit 168 169 170 171 172 173 174 175
22
bit 176 177 178 179 180 181 182 183
23
bit 184 185 186 187 188 189 190 191
a: use of channel status block. c: copyright information.
b: linear PCM identification. d: additional format information.

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Byte 0: General control and mode information


Control:


Bit 0 “0” Consumer use of channel status block.


NOTE The significance of byte 0, bit 0 is such that transmission from an interface conforming to IEC 60958-4 can
be identified.



Bit 1 “0” Audio sample word represents linear PCM samples.

“1” Audio sample word used for other purposes.
Bit 2 “0” Software for which copyright is asserted.
“1” Software for which no copyright is asserted.
NOTE Bit 2 is referred to as the “Cp-bit”. It should be indicated whether copyright protection has been asserted.
The copyright status may be unknown for certain applications. The above interpretation is
therefore not valid in combination with some category codes (see annexes). The Cp-bit can
alternate between 0 and 1 at a rate between 4 Hz and 10 Hz (see annex A).
Bits Additional format information, meaning depends on bit 1.
3-5
When bit 1 = “0”, linear PCM audio mode:
bit 3 4 5
state “0 0 0” 2 audio channels without pre-emphasis.
“1 0 0” 2 audio channels with 50/15 μs pre-emphasis.
“0 1 0” Reserved (for 2 audio channels with pre-emphasis).
“1 1 0” Reserved (for 2 audio channels with pre-emphasis).
All other states of bits 3-5 are reserved and shall not be used until further
defined.
When bit 1 = “1”, other than linear PCM applications:
bit 3 4 5
state “0 0 0” Default state for applications other than linear PCM.

All other states of bits 3-5 are reserved and shall not be used until further
defined.
Bits Channel status mode, indicates one of four possible channel status formats
6-7 (bytes 1 to 23). There are four possible modes for each of the states of bit 1.
bit 6 7
state “0 0” Mode 0, refer to 4.2.2.
All other states of bits 6-7 are reserved and shall not be used until further
defined.
The contents of bits 8 to 191 depend on the mode as indicated by bits 6 and 7. If not defined
otherwise, the default value is “0”.

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4.2.2 Mode 0 channel status format for digital audio equipment for consumer use


When the audio sample word represents linear PCM and the channel status mode is mode 0,

the following channel status format should be applied:


Table 2 – Mode 0 channel status format for consumer use

Byte

 0 a = “0” b = “0” c d Mode = “0 0”

bit 0 1 2 34567

 1 Category code
bit 8 9 10 1112 1314 15
 2 Source number Channel number
bit 1617 1819 20 21 22 23
 3 Sampling frequency Clock accuracy
bit 2425 2627 28 29 30 31
 4 Word length
bit 3233 3435 36 37 38 39
 5
bit 4041 4243 44 45 46 47
 6
bit 4849 5051 52 53 54 55
 7
bit 5657 5859 60 61 62 63
 8
bit 6465 6667 68 69 70 71
 9
bit 7273 7475 76 77 78 79
10
bit 8081 8283 84 85 86 87
11
bit 8889 9091 92 93 94 95
12
bit 96 97 98 99 100 101 102 103
13
bit 104 105 106 107 108 109 110 111
14
bit 112 113 114 115 116 117 118 119
15
bit 120 121 122 123 124 125 126 127
16
bit 128 129 130 131 132 133 134 135
17
bit 136 137 138 139 140 141 142 143
18

bit 144 145 146 147 148 149 150 151
19
bit 152 153 154 155 156 157 158 159
20
bit 160 161 162 163 164 165 166 167
21
bit 168 169 170 171 172 173 174 175
22
bit 176 177 178 179 180 181 182 183
23
bit 184 185 186 187 188 189 190 191
a: use of channel status block. c: copyright information.
b: linear PCM identification. d: additional format information.

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Byte 0 as defined in 4.2.1, with:


Bit 1 “0” Audio sample word represents linear PCM samples.

Bits 6-7 “0 0” Mode 0.



Byte 1: Category code


The category code indicates the kind of equipment that generates the digital audio interface

signal. See the relevant annexes for the assignments. Bit 8 = LSB, bit 15 = MSB.

Byte 2: Source and channel number
Bits 16-19 Source number, bit 16 = LSB, bit 19 = MSB.
bit 16 17 18 19
state “0 0 0 0” Do not take into account.
“1 0 0 0” 1
“0 1 0 0” 2
“1 1 0 0” 3
............
“1 1 1 1” 15
Bits 20-23 Channel number (audio channel), bit 20 = LSB, bit 23 = MSB.
bit 20 21 22 23
state “0 0 0 0” Do not take into account.
“1 0 0 0” A (left channel for stereo channel format).
“0 1 0 0” B (right channel for stereo channel format).
“1 1 0 0” C
................
“1 1 1 1” O
Byte 3: Sampling frequency and clock accuracy
Bits 24-27 Sampling frequency
bit 24 25 26 27

state “0 0 0 0” 44,1 kHz
“0 1 0 0” 48 kHz
“1 1 0 0” 32 kHz
All other combinations are reserved and shall not be used until further
defined.
Bits 28-29 Clock accuracy.
bit 28 29
state “0 0” Level II.
“1 0” Level I.
“0 1” Level III.
“1 1” Reserved.

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Byte 4: Word length


Bit 32 “0” Maximum audio sample word length is 20 bits.

“1” Maximum audio sample word length is 24 bits.


Bits 33- Sample word length
35

bit 33 34 35 Audio sample word Audio sample word length

length if maximum length if maximum length is 20

is 24 bits as indicated by bits as indicated by bit 32.
bit 32.
state “0 0 0” Word length not indicated Word length not indicated
(default) (default)
“1 0 0” 20 bits 16 bits
“0 1 0” 22 bits 18 bits
“0 0 1” 23 bits 19 bits
“1 0 1” 24 bits 20 bits
“0 1 1” 21 bits 17 bits
All other combinations are reserved and shall not be used until further
defined.
NOTE The first edition of IEC 60958 had bits 32 to 35 reserved and set to zero. Therefore, the all zero state for
these bits on a received signal may be an indicator that the word length indication has not been implemented.
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 all channels, with the exception of the channel number, if not
equal to zero.
4.3 Copyright management guidelines for consumer application of the digital
audio interface
4.3.1 General
Category codes are defined for all consumer products that are capable of supplying a digital

signal to consumer digital audio recorders, except for products that are fully transparent from
input to output.
Category codes for products have been grouped by general function of the product. This
makes it possible to take into account future digital recording products not yet defined in detail.
Such a product then deals with the group code under a general rule. These rules define
whether a digital recorder is enabled to record a copyright protected digital signal.
Unless otherwise specified, any consumer equipment capable of transferring digital audio
information from an input terminal to an output terminal, if not fully transparent and regardless
of the delay or kind of transformation of the audio content of the signal, shall copy channel
status bits 0, 1, 3, 4, 5, 6 and 7 from the source. Bit 2 shall be copied from the source, unless
otherwise specified in the annexes.
Bit 15 is referred to as the “L-bit”. It shall indicate the “generation status” of the digital audio
signal.

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“Generation status” means:


• whether the signal emanates from a source that has been produced or published or

authorized by the rights owner of the material, such as commercially released pre-recorded
compact discs or DAT tapes or a digital broadcast (referred to herein as “original”) and for
which copyright has been asserted;


• or whether the signal emanates from a recording made from such “original” material

(referred to herein as “a home-copy of generation 1 or higher”).

Generally the L-bit is specified as:


Bit 15 “0” No indication.
“1” Commercially released pre-recorded software.
For historical reasons, the reverse situation is valid for the signals originating from:
laser optical products (category code “100 XXXXL”);
broadcast reception (category codes “001 XXXXL” and “011 1XXXL”).
For these category codes the L-bit shall indicate:
Bit 15 “0” Commercially released pre-recorded software.
“1” No indication.
The generation status may be unknown for certain applications. The above interpretation is
therefore not valid in combination with some category codes such as:
• general (category code “000 00000”);
• analogue/digital converters for analogue signals without copyright information (category
code “011 00XXL”).
4.3.2 Category code groups
4.3.2.1 The category code groups are defined in table 3.
Table 3 – Category code groups
Bit 8. 15 Category
“000 00000” General. Used temporarily
“100 XXXXL” Laser optical products
“010 XXXXL” Digital/digital converters and signal processing products

“110 XXXXL” Magnetic tape or disc based products
“001 XXXXL” Broadcast reception of digitally encoded audio signals with or without video signals
and
“011 1XXXL”
“101 XXXXL” Musical instruments, microphones and other sources without copyright information
“011 00XXL” Analogue/digital converters for analogue signals without copyright information
“011 01XXL” Analogue/digital converters for analogue signals which include copyright information
in the form of “Cp-bit and L-bit status”
“000 1XXXL” Solid state memory based products
“000 0001L” Experimental products not for commercial sale
“111 XXXXL” Not defined. Reserved
“000 0XXXL” Not defined. Reserved, except “000 00000” and “000 0001L”

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4.3.2.2 Within a group a further indication of the kind of source is given.


4.3.2.2.1 For the general category code (“000 00000”) the following applies:


– used temporarily;

– applied specifically for digital audio broadcast reception with or without a video signal, for

example digital satellite reception in Japan in the case where no copyright information is

transmitted. (See also annex H.)


4.3.2.2.2 For the group of laser optical products (category code = “100 XXXXL”) the category

codes
...