oSIST prEN IEC 60958-3:2021
(Main)Digital audio interface - Part 3: Consumer applications (TA 20)
Digital audio interface - Part 3: Consumer applications (TA 20)
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.
Digitalton-Schnittstelle - Teil 3: Allgemeingebrauch
Interface audionumérique - Partie 3: Applications grand public
Digitalni zvokovni vmesnik - 3. del: Porabniške aplikacije (TA 20)
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN IEC 60958-3:2021
01-marec-2021
Digitalni zvokovni vmesnik - 3. del: Porabniške aplikacije (TA 20)
Digital audio interface - Part 3: Consumer applications (TA 20)
Digitalton-Schnittstelle - Teil 3: Allgemeingebrauch
Interface audionumérique - Partie 3: Applications grand public
Ta slovenski standard je istoveten z: prEN IEC 60958-3:2021
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
oSIST prEN IEC 60958-3:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60958-3:2021
100/3543/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60958-3 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-01-22 2021-04-16
SUPERSEDES DOCUMENTS:
100/3466/CD, 100/3497/CC
IEC TA 20 : ANALOGUE AND DIGITAL AUDIO
SECRETARIAT: SECRETARY:
Japan Mr Gen Ichimura
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel votingThe attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.TITLE:
Digital audio interface - Part 3: Consumer applications (TA 20)
PROPOSED STABILITY DATE: 2023
NOTE FROM TC/SC OFFICERS:
Copyright © 2020 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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1 CONTENTS
2 FOREWORD ........................................................................................................................... 5
3 1 Scope ............................................................................................................................... 7
4 2 Normative references ....................................................................................................... 7
5 3 Terms and definitions ....................................................................................................... 7
6 4 Interface format ................................................................................................................ 8
7 5 Channel status ................................................................................................................. 8
8 5.1 General ................................................................................................................... 8
9 5.2 Application .............................................................................................................. 8
10 5.3 Copyright management guidelines for consumer application of the digital11 audio interface ...................................................................................................... 15
12 6 User data ....................................................................................................................... 19
13 6.1 General ................................................................................................................. 19
14 6.2 Application ............................................................................................................ 20
15 6.3 Information for synchronization .............................................................................. 25
16 Annex A (normative) Application of the digital audio interface in the compact disc
17 digital audio system .............................................................................................................. 29
18 Annex B (normative) Application of the digital interface in the 2-channel PCM
19 encoder/decoder ................................................................................................................... 31
20 Annex C (normative) Application of the digital interface in the 2-channel digital audio
21 tape recorder in the consumer mode ..................................................................................... 32
22 Annex D (normative) Application of the digital interface in laser optical digital audio
23 systems for which no other category code is defined............................................................. 36
24 Annex E (normative) Application of the digital interface in a digital audio mixer in the
25 consumer mode .................................................................................................................... 37
26 Annex F (normative) Application of the digital interface with a sampling rate converter
27 in the consumer mode........................................................................................................... 38
28 Annex G (normative) Application of the digital interface with a digital sound sampler
29 in the consumer mode........................................................................................................... 39
30 Annex H (normative) Application of the digital interface in a digital broadcast receiver
31 (Japan) in the consumer mode .............................................................................................. 40
32 Annex J (normative) Application of the digital interface in a digital broadcast receiver
33 (Europe) in the consumer mode ............................................................................................ 41
34 Annex K (normative) Application of the digital interface in a digital broadcast receiver
35 (USA) in the consumer mode ............................................................................................... 42
36 Annex L (normative) Application of the digital interface for electronic software delivery
37 in the consumer mode........................................................................................................... 43
38 Annex M (normative) Application of the digital interface in the digital compact cassette
39 system in the consumer mode ............................................................................................... 44
40 Annex N (normative) Application of the digital interface in the mini-disc system in the
41 consumer mode .................................................................................................................... 49
42 Annex O (normative) Application of the digital interface in a digital sound processor in
43 the consumer mode .............................................................................................................. 50
44 Annex P (normative) Application of the digital interface in the digital versatile disc
45 system (DVD) in the consumer mode .................................................................................... 51
46 Annex Q (informative) Use of original sampling frequency, sampling frequency and
47 clock accuracy ...................................................................................................................... 52
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48 Annex R (normative) Application of the digital interface in magnetic disc digital audio
49 systems in the consumer mode ............................................................................................. 54
50 Annex S (normative) Explanations of category code implementation .................................... 55
51 Annex T (informative) Application of the digital audio interface for synchronization of
52 audio, video and multi-media equipments ............................................................................. 60
Annex U (normative) MPEG Surround over PCM ................................................................. 66
54 Bibliography .......................................................................................................................... 68
56 Figure 1 – Example of message structure using information units ......................................... 21
57 Figure 2 – First UI contents ................................................................................................... 22
58 Figure 3 – Second UI contents .............................................................................................. 22
59 Figure 4 – Third UI contents ................................................................................................. 24
60 Figure 5 – User information................................................................................................... 24
61 Figure 6 – SMPTE time code information .............................................................................. 25
62 Figure 7 – LTC information alignment ................................................................................... 25
63 Figure 8 – VITC information alignment .................................................................................. 26
64 Figure 9 – Latency information .............................................................................................. 26
65 Figure 10 – Latency information alignment ............................................................................ 27
66 Figure 11 – Loudness information ......................................................................................... 27
67 Figure 12 – Loudness information alignment ......................................................................... 28
68 Figure C.1 – Example of different combinations of start-ID and shortening-ID ....................... 35
69 Figure M.1 – Marker mode .................................................................................................... 44
70 Figure M.2 – Extended mode ................................................................................................ 45
71 Figure Q.1 – Player and interface model ............................................................................... 52
72 Figure S.1 – Multi-media player ............................................................................................ 55
73 Figure S.2 – Home-recorded medium player ......................................................................... 56
74 Figure S.3 – Direct monitoring .............................................................................................. 56
75 Figure S.4 – Monitoring after recording ................................................................................. 57
76 Figure S.5 – Integrated product ............................................................................................ 57
77 Figure S.6 – Digital/digital converter ..................................................................................... 58
78 Figure S.7 – Integrated product including digital/digital converter .......................................... 58
79 Figure S.8 – Integrated product including magnetic disc recorder ......................................... 59
80 Figure T.1 – Lip-sync system model ...................................................................................... 60
81 Figure T.2 – Lip-sync compensation ..................................................................................... 61
82 Figure T.3 – Time-code transmission .................................................................................... 61
83 Figure T.4 – Latency parameter transmission ....................................................................... 62
84 Figure T.5 – Latency parameter transmission with TLv.......................................................... 62
85 Figure T.6 – Example of latency parameter transmission ...................................................... 64
86 Figure T.7 – Another example for solving lip-sync problems .................................................. 65
87 Figure U.1 – Relation between MPEG Surround buried data frame and IEC 60958-388 frame .................................................................................................................................... 66
90 Table 1 – Channel status general format for consumer use ..................................................... 9
91 Table 2 – Mode 0 channel status format for consumer use .................................................... 11
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92 Table 3 – Category code groups ........................................................................................... 16
93 Table 4 – Category code groups for laser optical products .................................................... 17
94 Table 5 – Category code groups for digital/digital converter and signal-processing
95 products ............................................................................................................................... 17
96 Table 6 – Category code groups for magnetic tape or magnetic disc based products ............ 18
97 Table 7 – Category code groups for broadcast reception of digitally encoded audio
98 with/without video signals ..................................................................................................... 18
99 Table 8 – Category code groups for musical instruments, microphones and other100 sources that create original sound ........................................................................................ 18
101 Table 9 – Category code groups for A/D converters for analogue signals without
102 copyright information ............................................................................................................ 19
103 Table 10 – Category code groups for A/D converters for analogue signals with104 copyright information ............................................................................................................ 19
105Table 11 – Category code groups for solid state memory based products ............................. 19
106 Table A.1 – Example of 2-channel compact disc format ........................................................ 30
107Table C.1 – Use of Cp-bit, L-bit and category code for DAT .................................................. 32
108 Table C.2 – User data application in the DAT system ............................................................ 34
109Table M.1 – Layout of message number “000000” ................................................................. 46
110 Table M.2 – Deck status codes ............................................................................................. 46
111Table M.3 – ITTS packet extended message example ........................................................... 47
112 Table Q.1 – Term definitions ................................................................................................. 52
113Table Q.2 – Cases ................................................................................................................ 53
114 Table Q.3 – Example ............................................................................................................ 53
115116
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117 INTERNATIONAL ELECTROTECHNICAL COMMISSION
118 ____________
119
120 DIGITAL AUDIO INTERFACE –
121
122 Part 3: Consumer applications
123
124
125
126 FOREWORD
127 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
128 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
129 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
130 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
131 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
132 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
133 in the subject dealt with may participate in this preparatory work. International, governmental and non-
134 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
135 with the International Organization for Standardization (ISO) in accordance with conditions determined by
136 agreement between the two organizations.137 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
138 consensus of opinion on the relevant subjects since each technical committee has representation from all
139 interested IEC National Committees.140 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
141 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
142 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
143 misinterpretation by any end user.144 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
145 transparently to the maximum extent possible in their national and regional publications. Any divergence
146 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
147 the latter.148 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
149 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
150 services carried out by independent certification bodies.151 6) All users should ensure that they have the latest edition of this publication.
152 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
153 members of its technical committees and IEC National Committees for any personal injury, property damage or
154 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
155 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
156 Publications.157 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
158 indispensable for the correct application of this publication.159 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
160 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
161 IEC 60958-3 has been prepared by technical area 20: Analogue and digital audio of IEC
162 technical committee 100: Audio, video and multimedia systems and equipment. It is an
163 International Standard.164 This 4th edition cancels and replaces the 3rd edition published in 2006, Amendment 1:2009
165 and Amendment 2:2015. This edition constitutes a technical revision.166 This edition includes the following significant technical changes with respect to the previous
167 edition:168 a) The relevant part of IEC 60958-5 is supported.
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169 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
170
171 Full information on the voting for its approval can be found in the report on voting indicated in
172 the above table.173 The language used for the development of this International Standard is English.
174 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
175 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
176 available at www.iec.ch/members_experts/refdocs. The main document types developed by
177 IEC are described in greater detail at www.iec.ch/standardsdev/publications.178 The committee has decided that the contents of this document will remain unchanged until the
179 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
180 the specific document. At this date, the document will be181 • reconfirmed,
182 • withdrawn,
183 • replaced by a revised edition, or
184 • amended.
185
186
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187 DIGITAL AUDIO INTERFACE –
188
189 Part 3: Consumer applications
190
191
192
193 1 Scope
194 This part of IEC 60958 specifies the consumer application of the interface for the inter-
195 connection of digital audio equipment defined in IEC 60958-1.196 NOTE When used in a consumer digital processing environment, the interface is primarily intended to carry
197 stereophonic programmes, with a resolution of up to 20 bits per sample, an extension to 24 bits per sample being
198 possible.199 2 Normative references
200 The following documents are referred to in the text in such a way that some or all of their
201 content constitutes requirements of this document. For dated references, only the edition
202 cited applies. For undated references, the latest edition of the referenced document (including
203 any amendments) applies.204 IEC 60841:1988, Audio recording – PCM encoder/decoder system
205 IEC 60908:1999, Audio recording – Compact disc digital audio system
206 IEC 60958-1:2004, Digital audio interface – Part 1: General
207 IEC 60958-5:2020 (in preparation), Digital audio interface – Part 5: Consumer application
208 enhancement209 IEC 61119-1:1992, Digital audio tape cassette system (DAT) – Part 1: Dimensions and
210 characteristics211 IEC 61119-6:1992, Digital audio tape cassette system (DAT) – Part 6: Serial copy
212 management system213 IEC 62574:2020, Audio, video and multimedia systems – General channel assignment of
214 multichannel audio215 IEEE 1394:2004, IEEE standard for high-performance serial bus bridges
216 ISO/IEC 23003-1, Information technology – MPEG audio technologies – Part 1: MPEG
217 Surround218 Recommendation ITU-R BS.775-3:2012, Multichannel stereophonic sound system with and
219 without accompanying picture220 3 Terms and definitions
221 For the purposes of this document, the terms and definitions given in IEC 60958-1 apply.
222 ISO and IEC maintain terminological databases for use in standardization at the following
223 addresses:---------------------- Page: 10 ----------------------
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224 • IEC Electropedia: available at http://www.electropedia.org/
225 • ISO Online browsing platform: available at http://www.iso.org/obp
226 4 Interface format
227 The interface format as defined in IEC 60958-1 shall be used.
228 Unless otherwise specified in the annexes, the following specification is applicable.
229 • Audio sample word has a length of 20 bits/sample. The auxiliary sample bits are an
230 optional expansion of the audio sample, if not used = “0”.231 • User data is not used, all bits = “0”.
232 • Channel status is identical for both subframes of the interface, with the exception of the
233 channel number, if that is not equal to zero.234 5 Channel status
235 5.1 General
236 For every subframe, the channel status bit provides information related to the audio channel
237 that is carried in that same subframe.238 Channel status information is organized in a 192-bit block, subdivided into 24 bytes,
239 numbered 0 to 23 (see Table 1). The first bit of each channel status block is carried in the
240 frame with preamble “B”.241 The individual bits of a channel status block are numbered 0 to 191.
242 The primary application is indicated by channel status bit 0.
243 As stated in IEC 60958-1, for the consumer digital audio applications described in this
244 document and IEC 60958-5, this first channel status bit equals “0”.245 NOTE As stated in IEC 60958-1, for professional application this first channel status bit equals “1”.
246 Secondary applications may be defined within the framework of these primary applications.
247 5.2 Application248 5.2.1 Channel status general format
249 For each channel, the channel status block provides the information described in this clause
250 and summarized in Table 1.251
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252 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
bit 8 9 10 11 12 13 14 15
bit 16 17 18 19 20 21 22 23
bit 24 25 26 27 28 29 30 31
bit 32 33 34 35 36 37 38 39
bit 40 41 42 43 44 45 46 47
bit 48 49 50 51 52 53 54 55
bit 56 57 58 59 60 61 62 63
bit 64 65 66 67 68 69 70 71
bit 72 73 74 75 76 77 78 79
bit 80 81 82 83 84 85 86 87
bit 88 89 90 91 92 93 94 95
bit 96 97 98 99 100 101 102 103
bit 104 105 106 107 108 109 110 111
bit 112 113 114 115 116 117 118 119
bit 120 121 122 123 124 125 126 127
bit 128 129 130 131 132 133 134 135
bit 136 137 138 139 140 141 142 143
bit 144 145 146 147 148 149 150 151
bit 152 153 154 155 156 157 158 159
bit 160 161 162 163 164 165 166 167
Bit 168 169 170 171 172 173 174 175
Bit 176 177 178 179 180 181 182 183
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
253
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254 Byte 0: General control and mode information
255 Control:
Bit 0 “0” Consumer use of channel status block (Notes 1 and 2)
256
257 NOTE 1 The significance of byte 0, bit 0 is such that transmission from an interface conforming to IEC 60958-4
258 can be identified.Bit 1 “0” Audio sample word represents linear PCM samples (Note 2)
“1” Audio sample word used for other purposes
259 NOTE 2 The functions of channel status bits 0 and 1 are defined in IEC 60958-1.
260Bit 2 “0” Software for which copyright is asserted (Note 3)
“1” Software for which no copyright is asserted
261 NOTE 3 Bit 2 is referred to as the “Cp-bit”. It should indicate whether copyright protection has been asserted.
262 The copyright status may be unknown for certain applications. The above interpretation is
263 therefore not valid in combination with some category codes (as indicated in the annex
264 associated with the category code). The Cp-bit can alternate between 0 and 1 at a rate
265 between 4 Hz and 10 Hz (see 29).Bits 3 to 5 Additional format information, meaning depends on bit 1.
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 µs /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)
“0 0 1” Assigned for IEC 60958-5
“0 1 1” Assigned for IEC 60958-5
All other states of bits 3 to 5 are reserved and shall not be used until
further defined.
NOTE 4 The single and dual channel operating modes are defined with the frame format in IEC 60958-1.
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 to 5 are reserved and shall not be used until
further defined.
266
Bits 6 to 7 Channel status mode, indicates one of four possible channel status formats
(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 11
All other states of bits 6 and 7 are reserved and shall not be used until
further defined.
267
268 The contents of bits 8 to 191 depend on the mode as indicated by bits 6 and 7. If not defined
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270 5.2.2 Mode 0 chan
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