SIST EN IEC 60958-5:2021
(Main)Digital audio interface - Part 5: Consumer application enhancement (IEC 60958-5:2021)
Digital audio interface - Part 5: Consumer application enhancement (IEC 60958-5:2021)
This part of IEC 60958 enhances the consumer application of the interface for the
interconnection of digital audio equipment defined in IEC 60958-1 and IEC 60958-3, introducing:
– multichannel;
– multi-stream;
– high-resolution;
– multimedia extension;
– related applications.
NOTE IEC 60958-3 specifies a consumer application to carry stereophonic programmes with a resolution of up to
24 bits per sample. This part of IEC 60958 enhances the application, allowing programmes with up to 64 channels,
64 bits per sample, and two simultaneous streams.
Digitalton-Schnittstelle - Teil 5: Verbesserungen für den Allgemeingebrauch (IEC 60958-5:2021)
Interface audionumérique - Partie 5: Amélioration de l'application grand public (IEC 60958-5:2021)
L'IEC 60958-5:2021 a pour objet d'améliorer l'application grand public de l'interface destinée à l'interconnexion des appareils audionumériques définis dans l'IEC 60958-1 et l'IEC 60958-3, en introduisant les améliorations suivantes:
- voies multiples;
- multiflux;
- haute résolution;
- extension multimédia;
- applications connexes.
Digitalni avdio vmesnik - 5. del: Izboljšanje potrošniških aplikacij (IEC 60958-5:2021)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60958-5:2021
01-december-2021
Digitalni avdio vmesnik - 5. del: Izboljšanje potrošniških aplikacij (IEC 60958-
5:2021)
Digital audio interface - Part 5: Consumer application enhancement (IEC 60958-5:2021)
Digitalton-Schnittstelle - Teil 5: Verbesserungen für den Allgemeingebrauch (IEC 60958-
5:2021)
Interface audionumérique - Partie 5: Amélioration de l'application grand public (IEC
60958-5:2021)
Ta slovenski standard je istoveten z: EN IEC 60958-5:2021
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
SIST EN IEC 60958-5:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60958-5:2021
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SIST EN IEC 60958-5:2021
EUROPEAN STANDARD EN IEC 60958-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS 33.160.01; 33.160.30
English Version
Digital audio interface - Part 5: Consumer application
enhancement
(IEC 60958-5:2021)
Interface audionumérique - Partie 5: Amélioration de Digitalton-Schnittstelle - Teil 5: Verbesserungen für den
l'application grand public Allgemeingebrauch
(IEC 60958-5:2021) (IEC 60958-5:2021)
This European Standard was approved by CENELEC on 2021-03-10. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60958-5:2021 E
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SIST EN IEC 60958-5:2021
EN IEC 60958-5:2021 (E)
European foreword
The text of document 100/3449/CDV, future edition 1 of IEC 60958-5, prepared by IEC/TC 100 "Audio,
video and multimedia systems and equipment" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60958-5:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-12-10
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-03-10
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60958-5:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
ISO 9241-910:2011 NOTE Harmonized as EN ISO 9241-910:2011 (not modified)
IEC 61883-6:2014 NOTE Harmonized as EN 61883-6:2014 (not modified)
IEC 62574:2011 NOTE Harmonized as EN 62574:2011 (not modified)
2
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SIST EN IEC 60958-5:2021
EN IEC 60958-5:2021 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
1 2
IEC 60958-1 — Digital audio interface - Part 1: General EN IEC 60958-1 —
(TA 20)
3 4
IEC 60958-3 — Digital audio interface - Part 3: Consumer EN IEC 60958-3 —
applications (TA 20)
IEC 62574 2020 Audio, video and multimedia systems - - -
General channel assignment of
multichannel audio
5
ISO/IEC 23001-8 2016 Information technology - MPEG systems - -
technologies - Part 8:
Codingindependent code points
ITU-R BS.2094-1 2017 Common definitions for the audio - -
definition model
ITU-R BS.2051-2 2018 Advanced sound system for programme - -
production
1
Under preparation. Stage at the time of publication: IEC CCDV 60958-1:2021.
2
Under preparation. Stage at the time of publication: prEN IEC 60958-1:2021.
3
Under preparation. Stage at the time of publication: IEC CCDV 60958-3:2021.
4
Under preparation. Stage at the time of publication: prEN IEC 60958-3:2021.
5
This publication was withdrawn and replaced with ISO/IEC 23091-3:2018, ISO/IEC 23091-1:2018 and ISO/IEC
23091-2:2019.
3
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SIST EN IEC 60958-5:2021
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SIST EN IEC 60958-5:2021
IEC 60958-5
®
Edition 1.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Digital audio interface –
Part 5: Consumer application enhancement
Interface audionumérique –
Partie 5: Amélioration de l'application grand public
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.160.01; 33.160.30 ISBN 978-2-8322-9325-6
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 60958-5:2021
– 2 – IEC 60958-5:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Interface format . 9
5 Operation modes . 9
5.1 General . 9
5.2 Multichannel linear PCM operation mode . 9
5.3 One-bit audio operation mode . 10
5.4 High-precision multi-bit linear audio operation mode . 11
6 Channel status . 12
6.1 General . 12
6.2 Application . 12
6.2.1 Channel status general format . 12
6.2.2 Mode 0 channel status format for digital audio equipment for enhanced
consumer use . 13
7 Stream change . 16
Annex A (informative) Audio and vibrotactile applications . 17
A.1 General . 17
A.2 Channel assignments of vibrotactile signals . 17
Annex B (informative) Audio and MIDI application . 19
B.1 General . 19
B.2 Audio and MIDI 2.0 application . 19
Bibliography . 20
Figure 1 – Example: multichannel group and subgroups . 10
Figure 2 – One-bit audio subframe . 11
Figure 3 – 32/64-bit mode subframe. 11
Figure 4 – 32-bit mode frame . 11
Figure 5 – 64-bit mode frame . 12
Figure 6 – Switching from one linear PCM audio mode to the other linear PCM audio
mode . 16
Figure B.1 – Subframe format . 19
Table 1 – Example: multichannel group and subgroups . 10
Table 2 – Mode 0 channel status format for enhanced consumer use. 13
Table 3 – Multichannel configuration . 15
Table A.1 – Vibrotactile channel assignments . 17
Table B.1 – Audio and MIDI 2.0 order . 19
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IEC 60958-5:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL AUDIO INTERFACE –
Part 5: Consumer application enhancement
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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.
IEC 60958-5 has been prepared by Technical Area 20: Analogue and digital audio, of IEC
Technical Committee 100: Audio, video and multimedia systems and equipment. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
100/3449/CDV 100/3517/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
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A list of all parts in the IEC 60958 series, published under the general title Digital audio interface,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 60958-5:2021
IEC 60958-5:2021 © IEC 2021 – 5 –
INTRODUCTION
IEC 60958-3 edition 1.0 was released in 1999 specifying the consumer applications of the
interface for the inter-connection of digital audio equipment defined in IEC 60958-1. The
applications have enhanced their quality including multichannel modes, high-precision bit length,
and multi-stream modes. These enhancements imply a new part in the IEC 60958 series,
appropriately keeping backward compatibility with IEC 60958-3 and providing a new enhanced
digital audio interface.
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DIGITAL AUDIO INTERFACE –
Part 5: Consumer application enhancement
1 Scope
This part of IEC 60958 enhances the consumer application of the interface for the
interconnection of digital audio equipment defined in IEC 60958-1 and IEC 60958-3, introducing:
– multichannel;
– multi-stream;
– high-resolution;
– multimedia extension;
– related applications.
NOTE IEC 60958-3 specifies a consumer application to carry stereophonic programmes with a resolution of up to
24 bits per sample. This part of IEC 60958 enhances the application, allowing programmes with up to 64 channels,
64 bits per sample, and two simultaneous streams.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
1
IEC 60958-1:20— , Digital audio interface – Part 1: General
2
IEC 60958-3:20— , Digital audio interface – Part 3: Consumer applications
IEC 62574:2020, Audio, video and multimedia systems – General channel assignment of
multichannel audio
ISO/IEC 23001-8:2016, Information technology – MPEG systems technologies – Part 8: Coding-
3
independent code points
ITU-R BS.2094-1:2017, Common definitions for the audio definition model
ITU-R BS.2051-2:2018, Advanced sound system for programme production
—————————
1
Under preparation. Stage at the time of publication: IEC CCDV 60958-1:2021.
2
Under preparation. Stage at the time of publication: IEC CCDV 60958-3:2021.
3
This publication was withdrawn and replaced with ISO/IEC 23091-3:2018, ISO/IEC 23091-1:2018 and ISO/IEC
23091-2:2019.
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IEC 60958-5:2021 © IEC 2021 – 7 –
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
one-bit audio
one-bit length audio data stream
Note 1 to entry: A one-bit audio data stream can be directly played back through the analogue low-pass filter bit by
bit (MSB first).
3.2
high-precision multi-bit linear audio
linear PCM audio data longer than 25 bits length per sample
Note 1 to entry: This document supports 32- and 64-bit lengths.
3.3
sampling frequency
frequency of the samples representing an audio signal.
Note 1 to entry: When more than one signal is transmitted through the same interface, the sampling frequencies
are identical.
[SOURCE: IEC 60958-1:20—, 3.1]
3.4
audio sample word
value of a digital audio sample
Note 1 to entry: Representation is linear in 2's complement binary form.
Note 2 to entry: Positive numbers correspond to positive analogue voltages at the input of the analogue-to-digital
converter (ADC).
[SOURCE: IEC 60958-1: 20—, 3.2]
3.5
channel status
data carrying, in a fixed format, information associated with each main data field channel, which
is decodable by any interface user.
Note 1 to entry: IEC 60958-3 specifies the mode 0 channel status format for digital audio equipment for consumer
use.
EXAMPLE 1 Length of audio sample words.
EXAMPLE 2 Sampling frequency.
[SOURCE: IEC 60958-1:20—, 3.5, modified – Modification of the Note to entry, and addition of
two examples.]
3.6
preamble
specific patterns used for synchronization.
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Note 1 to entry: There are three different preambles: “B”; “M”; and “W”.
[SOURCE: IEC 60958-1:20—, 3.8, modified – Modification of the Note to entry.]
3.7
sub-frame
fixed structure used to carry information
[SOURCE: IEC 60958-1:20—, 3.9]
3.8
frame
sequence of two successive and associated sub-frames
[SOURCE: IEC 60958-1:20—, 3.10]
3.9
block
group of 192 consecutive frames
Note 1 to entry: The start of a block is designated by a special sub-frame preamble.
[SOURCE: IEC 60958-1:20—, 3.11]
3.10
channel number
number that shows channel order in two-channel operation mode
3.11
channel label ID
label of ID
[SOURCE: IEC 62574:2020, 3.73]
3.11.1
multichannel number
number that identifies multichannel addressing
Note 1 to entry: Same as IEC 62574 channel number
3.12
multichannel group
group composed of one or two multichannel subgroups
3.13
multichannel count
count of channels in a multichannel group
3.14
multichannel subgroup
subgroup, in a multichannel group, composed of several multichannel
Note 1 to entry: Multichannel subgroup A is set according to multichannel configuration.
Note 2 to entry: Multichannel subgroup B is set according to multichannel map.
3.15
multichannel configuration
configuration of multichannel addressing
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3.16
multichannel order
order of multichannel in a multichannel group
3.17
multichannel map
map of multichannel selections
4 Interface format
The interface format as defined in IEC 60958-1 and IEC 60958-3 shall be used unless otherwise
specified in this document.
5 Operation modes
5.1 General
IEC 60958-1 specifies single- and two-channel operation modes. This document introduces
several new operation modes based on the same interface format of IEC 60958-1 without the
pre-emphasis function defined in IEC 60958-3. Channel status information identifies these
modes in operation. This document shares the information with IEC 60958-1 and IEC 60958-3
and specifies new usages.
5.2 Multichannel linear PCM operation mode
In multichannel linear PCM operation mode, the samples taken from multichannel linear PCM
are transmitted by time multiplexing in consecutive sub-frames.
A multichannel group is composed of several multichannel by consecutive frames. The number
of multichannels included in the group is identified by the multichannel count of channel status
bits 44 to 47. The group starts with preamble “B” and repeats itself with no break in the block
and without un-grouped frames. The group is divided into one or two multichannel subgroups
by the multichannel configuration of channel status bits 49 to 60 and the multichannel map of
channel status bits 64 to 165. The subgroup is composed of some specific multichannels by
consecutive sub-frames. Each multichannel within the multichannel subgroup B is re-numbered
according to the multichannel number of channel status bits 64 to 165. Each channel carries
consecutive audio sample words.
An example is shown in Figure 1 and Table 1. The multichannel group is composed of eight
multichannels. This number of eight is identified by the multichannel count value of “1110”. The
multichannel subgroup A is composed of three multichannels identified by the multichannel
configuration value of “100001010000”, which includes FrontLeft channel, FrontRight channel
and FrontCenter channel given in ITU-R BS.2094-1. The multichannel subgroup B is composed
th
of the 77 multichannel (channel label ID name of HFL) and 78th multichannel (channel label
ID name of HFR) by setting the channel status bit 77 to “1” and the channel status bit 78 to “1”.
Channels of multichannel order 6, 7 and 8 are not used in this example.
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Figure 1 – Example: multichannel group and subgroups
The sampling frequency of each audio multichannel is identical and identified by the original
sampling frequency of channel status bits 36 to 39. The sampling frequency of channel status
bits 24 to 27, 30 and 31 identifies the IEC 60958 frame rate in operation.
Table 1 – Example: multichannel group and subgroups
Preamble Channel Multichannel Multichannel Multichannel subgroup B
number order subgroup A
ITU-R BS.2094-1; Multichannel map C‑Bit 64‑191;
audioPackFormatID, Multichannel number value:
audioChannelNames Channel label ID name
B 1 1 AP_0001000a
FrontLeft
W 2 2
FrontRight
M 1 3 FrontCenter
W 2 4 77: HFL
M 1 5 78: HFR
W 2 6
M 1 7
W 2 8
M 1 1 AP 0001000a
FrontLeft
W 2 2
FrontRight
M 1 3 FrontCenter
W 2 4 77: HFL
M 1 5 78: HFR
W 2 6
M 1 7
W 2 8
M 1 1 AP_0001000a
⁞ ⁞ ⁞ ⁞ ⁞
M 1 7
W 2 8
AP 0001000a
B 1 1
FrontLeft
M 2 2
FrontRight
W 1 3 FrontCenter
5.3 One-bit audio operation mode
In one-bit audio operation mode, the samples taken from multichannel one-bit audio stream are
transmitted by time multiplexing in consecutive sub-frames. The sub-frame format is shown in
Figure 2.
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Figure 2 – One-bit audio subframe
Time slots 4 to 19 carry on-bit audio samples composed of 16 bits of the consecutive one-bit
audio stream. Significant bit (MSB) is carried by time slot 19.
Time slots 20 to 17 are not used; they are filled with zeros or a few fixed patterns and ignored.
The frame format as defined in multichannel linear PCM operation mode is used for
multichannel one-bit audio operation mode.
The sampling frequency of each one-bit audio channel is identical and identified by the original
sampling frequency of the channel status bits 36 to 39, which is 16 multiples of that of the
multichannel linear PCM. The sampling frequency of channel status bits 24 to 27, 30 and 31
identifies the IEC 60958 frame rate in operation. IEC 60958-3 defines the original sampling
frequency where one-bit audio multiples 16 and sampling frequency as the IEC 60958 frame
rate.
5.4 High-precision multi-bit linear audio operation mode
In the high-precision multi-bit linear audio operation mode, the samples taken from the
multichannel high-precision multi-bit linear audio are transmitted by time multiplexing in
consecutive sub-frames dividing of word. The sub-frame format of 32/64-bit mode is shown in
Figure 3. The frame formats are shown in Figure 4 and Figure 5.
Figure 3 – 32/64-bit mode subframe
In 32-bit audio operation mode, time slots 4 to 19 carry 16-bit samples of 32-bit audio words.
Significant bit (MSB) is carried by time slot 19. Time slots 20 to 17 are not used; they are filled
with zeros or a few fixed patterns and ignored.
Figure 4 – 32-bit mode frame
The frame format as defined in the multichannel linear PCM operation mode is used for
multichannel 32-bit operation modes.
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The original sampling frequency for the 32-bit mode corresponds to 1/2 of that of the
multichannel linear PCM.
In 64-bit audio operation mode, time slots 4 to 19 carry 16-bit samples of 64-bit audio words.
Most significant bit (MSB) is carried by time slot 19. Time slots 20 to 17 are not used; they are
filled with zeros or a few fixed patterns and ignored.
Figure 5 – 64-bit mode frame
The frame format as defined in the multichannel linear PCM operation mode is used for
multichannel 64-bit operation modes.
The original sampling frequency for 64-bit mode corresponds to 1/4 of that of the multichannel
linear PCM.
6 Channel status
6.1 General
The channel status format as defined in IEC 60958-1 and IEC 60958-3 shall be used unless
this document specifies.
6.2 Application
6.2.1 Channel status general format
For each IEC 60958-5 channel, the channel status block provides the information described in
this clause and summarized in Table 2.
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6.2.2 Mode 0 channel status format for digital audio equipment for enhanced
consumer use
Table 2 – Mode 0 channel status format for enhanced consumer use
Byte
0 a = “0” b = “0” c D Mode = “0 0”
“0 0 1”: Multichannel LPCM
“0 1 1”: refer to bit 32-35
bit 0 1 2 3
...
SLOVENSKI STANDARD
oSIST prEN IEC 60958-5:2020
01-oktober-2020
Digitalni avdio vmesnik - 5. del: Izboljšanje potrošniških aplikacij (TA 20)
Digital audio interface - Part 5: Consumer application enhancement (TA 20)
Ta slovenski standard je istoveten z: prEN IEC 60958-5:2020
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
oSIST prEN IEC 60958-5:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60958-5:2020
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oSIST prEN IEC 60958-5:2020
100/3449/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60958-5 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2020-08-07 2020-10-30
SUPERSEDES DOCUMENTS:
100/3321/CD, 100/3384/CC
IEC TA 20 : ANALOGUE AND DIGITAL AUDIO
SECRETARIAT: SECRETARY:
Japan Mr Gen Ichimura
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TITLE:
Digital audio interface - Part 5: Consumer application enhancement (TA 20)
PROPOSED STABILITY DATE: 2023
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1 CONTENTS
2
3 FOREWORD . 3
4 INTRODUCTION . 5
5 1 Scope . 6
6 2 Normative references . 6
7 3 Terms and definitions . 6
8 4 Interface format . 9
9 5 Operation modes . 9
10 5.1 General . 9
11 5.2 Multichannel linear PCM operation mode . 9
12 5.3 One-bit audio operation mode . 11
13 5.4 High-precision multi-bit linear audio operation mode . 11
14 6 Channel status . 12
15 6.1 General . 12
16 6.2 Application . 12
17 6.2.1 Channel status general format . 12
18 6.2.2 Mode 0 channel status format for digital audio equipment for enhanced
19 consumer use . 13
20 7 Stream change . 16
21 Annex A (informative) Audio and vibrotactile applications . 17
22 A.1 General . 17
23 A.2 Channel assignments of vibrotactile signals . 17
24 Annex B (informative) Audio and MIDI application . 19
25 B.1 General . 19
26 B.2 Audio and MIDI 2.0 application . 19
27
28 Figure 1 – Example: multichannel group and subgroups . 10
29 Figure 2 – One-bit audio subframe . 11
30 Figure 3 – 32/64-bit mode subframe . 11
31 Figure 4 – 32-bit mode frame . 12
32 Figure 5 – 64-bit mode frame . 12
33 Figure 6 – Switching from one linear PCM audio mode to the other linear PCM audio
34 mode . 16
35 Figure B.1 – subframe format. 19
36
37 Table 1 – Example: multichannel group and subgroups . 10
38 Table 2 – Mode 0 channel status format for enhanced consumer use . 13
39 Table 3 – Multichannel configuration . 15
40 Table A.1 – Vibrotactile channel assignments . 17
41 Table B.1 – Audio and MIDI 2.0 order . 19
42
43
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44 INTERNATIONAL ELECTROTECHNICAL COMMISSION
45 ____________
46
47 DIGITAL AUDIO INTERFACE –
48
49 Part 5: Consumer application enhancement
50
51 FOREWORD
52 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
53 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
54 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
55 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
56 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
57 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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60 with the International Organization for Standardization (ISO) in accordance with conditions determined by
61 agreement between the two organizations.
62 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
63 consensus of opinion on the relevant subjects since each technical committee has representation from all
64 interested IEC National Committees.
65 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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69 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
70 transparently to the maximum extent possible in their national and regional publications. Any divergence
71 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
72 the latter.
73 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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76 6) All users should ensure that they have the latest edition of this publication.
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80 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
81 Publications.
82 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
83 indispensable for the correct application of this publication.
84 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
85 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
86 International Standard IEC 60958-5 has been prepared by Technical Area 20: Analogue and
87 digital audio, of IEC Technical Committee 100: Audio, video and multimedia systems and
88 equipment.
89
90 The text of this International Standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/RVD
91
92 Full information on the voting for the approval of this International Standard can be found in
93 the report on voting indicated in the above table.
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94 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
95 The committee has decided that the contents of this document will remain unchanged until the
96 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
97 the specific document. At this date, the document will be
98 • reconfirmed,
99 • withdrawn,
100 • replaced by a revised edition, or
101 • amended.
102
103 The National Committees are requested to note that for this document the stability date
104 is 20XX.
105 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE
106 DELETED AT THE PUBLICATION STAGE.
107
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108 INTRODUCTION
109 IEC 60958-3 edition 1.0 was released in 1999 specifying the consumer applications of the
110 interface for the inter-connection of digital audio equipment defined in IEC 60958-1. The
111 applications have enhanced their quality including multichannel modes, high-precision bit
112 length, multi-stream modes. These enhancements require a new part of IEC 60958
113 appropriately keeping backward compatibility with IEC 60958-3 and providing a new enhanced
114 digital audio interface.
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115 DIGITAL AUDIO INTERFACE –
116
117 Part 5: Consumer application enhancement
118
119 1 Scope
120 This part of IEC 60958 enhances the consumer application of the interface for the
121 interconnection of digital audio equipment defined in IEC 60958-1 and IEC 60958-3
122 introducing:
123 – multichannel;
124 – multi-stream;
125 – high-resolution;
126 – multimedia extension;
127 – related applications.
128 NOTE: IEC 60958-3 specifies consumer application to carry stereophonic programmes with a resolution of up to 24
129 bits per sample. This part of IEC 60958 enhances them up to 64 channels programs, 64 bits per sample and two
130 simultaneous streams.
131 2 Normative references
132 The following documents are referred to in the text in such a way that some or all of their
133 content constitutes requirements of this document. For dated references, only the edition
134 cited applies. For undated references, the latest edition of the referenced document (including
135 any amendments) applies.
136 IEC 60958-1:2021 (under revision), Digital audio interface – Part 1: General
137 IEC 60958-3:2021 (under revision), Digital audio interface – Part 3: Consumer applications
138 IEC 61883-6: 2014, Consumer Audio/Video Equipment – Digital Interface – Part 6: Audio and
139 music data transmission protocol
140 IEC 62574:2020, Audio, video and multimedia systems – General channel assignment of
141 multichannel audio
142 ITU-R BS.2094-1: 2017, Common definitions for the audio definition model
143 ITU-R BS.775-3: 2012, Multichannel stereophonic sound system with and without
144 accompanying picture
145 ITU-R BS.2051-2: 2018, Advanced sound system for programme production
146 ISO/IEC 23001-8: 2016, Information technology — MPEG systems technologies — Part 8:
147 Coding independent code points, AMENDMENT 1: Additional audio code points
148 3 Terms and definitions
149 For the purposes of this document, the following terms and definitions apply.
150 ISO and IEC maintain terminological databases for use in standardization at the following
151 addresses:
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152 • IEC Electropedia: available at http://www.electropedia.org/
153 • ISO Online browsing platform: available at http://www.iso.org/obp
154 3.1
155 one-bit audio
156 one-bit length audio data stream
157 Note 1 to entry: One-bit audio data stream can be directly played back through the analogue low pass filter bit by
158 bit (MSB first).
159 [SOURCE: IEC 61883-6: 2014, 12.1.3]
160 3.2
161 high-precision multi-bit linear audio
162 linear PCM audio data longer than 25 bits length per sample
163 Note 1 to entry: This part of IEC 60958 supports 32- and 64-bits length.
164 [SOURCE: IEC 61883-6: 2014, 8.2.8]
165 3.3
166 sampling frequency
167 frequency of the samples representing an audio signal.
168 Note 1 to entry: When more than one signal is transmitted through the same interface, the sampling frequencies
169 are identical.
170 [SOURCE: IEC 60958-1: 2021]
171 3.4
172 audio sample word
173 value of a digital audio sample. Representation is linear in 2's complement binary form.
174 Note 1 to entry: Positive numbers correspond to positive analogue voltages at the input of the analogue-to-digital
175 converter (ADC).
176 [SOURCE: IEC 60958-1: 2021]
177 3.5
178 channel status
179 data carrying, in a fixed format, information associated with each main data field channel,
180 which is decodable by any interface user.
181 Note 1 to entry: IEC 60958-3 specifies Mode 0 channel status format for digital audio equipment for consumer use.
182 EXAMPLE 1 Length of audio sample words
183 EXAMPLE 2 Sampling frequency
184 [SOURCE: IEC 60958-1: 2021]
185 3.6
186 preamble
187 specific patterns used for synchronization.
188 Note 1 to entry: There are three different preambles: “B”; “M”; and “W”.
189 [SOURCE: IEC 60958-1: 2021]
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190 3.7
191 sub-frame
192 fixed structure used to carry information
193 [SOURCE: IEC 60958-1: 2021]
194 3.8
195 frame
196 sequence of two successive and associated sub-frames
197 [SOURCE: IEC 60958-1: 2021]
198 3.9
199 block
200 group of 192 consecutive frames.
201 Note 1 to entry: The start of a block is designated by a special sub-frame preamble.
202 [SOURCE: IEC 60958-1: 2021]
203 3.10
204 channel number
205 number that shows channel order in two channel operation mode
206 [SOURCE: IEC 60958-1: 2021]
207 3.11
208 channel label ID
209 label of ID
210 [SOURCE: IEC 62574: 2020]
211 3.11.1
212 multichannel number
213 number that identifies multichannel addressing
214 Note 1 to entry: Same as IEC 62574 channel number
215 [SOURCE: IEC 62574: 2019, 4.3]
216 3.12
217 multichannel group
218 group composed of one or two multichannel subgroups
219 3.13
220 multichannel count
221 count of channels in a multichannel group
222 3.14
223 multichannel subgroup
224 subgroup, in a multichannel group, composed of several multichannel
225 Note 1 to entry: Multichannel subgroup A is set according to multichannel configuration.
226 Note 2 to entry: Multichannel subgroup B is set according to multichannel map.
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227 3.15
228 multichannel configuration
229 configuration of multichannel addressing
230 3.16
231 multichannel order
232 order of multichannel in a multichannel group
233 3.17
234 multichannel map
235 map of multichannel selections
236 4 Interface format
237 The interface format as defined in IEC 60958-1 and IEC 60958-3 shall be used unless
238 otherwise specified in this part of IEC 60958.
239 5 Operation modes
240 5.1 General
241 IEC 60958-1 specifies single and two channel operation modes. This part of IEC 60958
242 introduces several new operation modes based on the same interface format of IEC 60958-1
243 without pre-emphasis function as defined in IEC 60958-3. Channel status information
244 identifies these modes in operation. This part of IEC 60958 shares the information with IEC
245 60958-1 and IEC 60958-3 and specifies new usages.
246 5.2 Multichannel linear PCM operation mode
247 In multichannel linear PCM operation mode, the samples taken from multichannel linear PCM
248 are transmitted by time multiplexing in consecutive sub-frames.
249 A multichannel group is composed of several multichannel by consecutive frames. The
250 number of multichannel included in the group is identified by multichannel count of channel
251 status bit 44 to 47. The group starts with preamble “B” and repeats itself with no break in the
252 block without un-grouped frame. The group is divided into one or two multichannel subgroups
253 by multichannel configuration of channel status bit 49 to 60 and multichannel map of channel
254 status bit 64 to 165. The subgroup is composed of some specific multichannel by consecutive
255 sub-frames. Each multichannel within the multichannel subgroup B is re-numbered according
256 to multichannel number of channel status bit 64 to 165. Each channel carries consecutive
257 audio sample word.
258 An example is showed in Figure 1 and Table 1. The multichannel group is composed of eight
259 multichannel. This number of eight is identified by multichannel count value of “1110”. The
260 multichannel subgroup A is composed of three multichannel identified by multichannel
261 configuration value of “100001010000” including FrontLeft channel, FrontRight channel and
262 FrontCenter channel given in ITU-R BS.2094-1. The multichannel subgroup B is composed of
263 77th multichannel (channel label ID name of HFL) and 78th multichannel (channel label ID
264 name of HFR) by setting the channel status bit 77 to “1” and the channel status bit 78 to “1”.
265 Channels of multichannel order 6, 7 and 8 are not used in this example.
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X Y Z Y X Y X X X Y
Y Y
Channel 1 W
M Channel 1 W Channel 2 B Channel 1 W Channel 2 M Channel 1 W Channel 2 M Channel 1 W Channel 2 M Channel 1 W Channel 2 M
Multichannel
Multichannel Multichannel Multichannel Multichannel Multichannel Multichannel Multichannel Multichannel
Multichannel Multichannel
Order 2 Order 3 Order 4 Order 5 Order 6 Order 7 Order 8 Order 1
Order 7 Order 8 Order 1
Multichannel group Multichannel group Multichannel group
Multichannel subgroup A
Multichannel subgroup B Multichannel subgroup A
Not configured FrontLeft FrontRight FrontCenter HFR Not configured Not configured
Not configured HFL Not configured FrontLeft
266
267
268 Figure 1 – Example: multichannel group and subgroups
269 The sampling frequency of each audio multichannel is identical and identified by original
270 sampling frequency of channel status
...
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