SIST EN 60958-4-4:2016

SLOVENSKI STANDARD
SIST EN 60958-4-4:2016
01-december-2016
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Digital audio interface - Part 4-4: Professional applications - Physical and electrical
parameters (IEC 60958-4-4:2016)
Digitalton-Schnittstelle - Teil 4-4: Professioneller Gebrauch - Physikalische und
elektrische Eigenschaften (IEC 60958-4-4:2016)
Interface audionumérique - Partie 4-4: Applications professionnelles - Paramètres
physiques et électriques (IEC 60958-4-4:2016)
Ta slovenski standard je istoveten z: EN 60958-4-4:2016
ICS:
33.160.30 Avdio sistemi Audio systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
SIST EN 60958-4-4:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60958-4-4:2016

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SIST EN 60958-4-4:2016


EUROPEAN STANDARD EN 60958-4-4

NORME EUROPÉENNE

EUROPÄISCHE NORM
July 2016
ICS 33.160.30 Supersedes EN 60958-4:2003 (partially)
English Version
Digital audio interface -
Part 4-4: Professional applications -
Physical and electrical parameters
(IEC 60958-4-4:2016)
Interface audionumérique -  Digitalton-Schnittstelle -
Partie 4-4: Applications professionnelles - Teil 4-4: Professioneller Gebrauch -
Paramètres physiques et électriques Physikalische und elektrische Eigenschaften
(IEC 60958-4-4:2016) (IEC 60958-4-4:2016)
This European Standard was approved by CENELEC on 2016-04-28. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60958-4-4:2016 E

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SIST EN 60958-4-4:2016
EN 60958-4-4:2016
European foreword
The text of document 100/2454/CDV, future edition 1 of IEC 60958-4-4, prepared by Technical Area 4
"Digital system interfaces and protocols", of IEC/TC 100 "Audio, video and multimedia systems and
equipment" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 60958-4-4:2016.
The following dates are fixed:
• latest date by which the document has to be implemented at (dop) 2017-01-28
national level by publication of an identical national
standard or by endorsement
(dow) 2019-04-28
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document, together with EN 60958-4-1:2016 and EN 60958-4-2:2016, supersedes EN 60958-4:2003.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60958-4-4:2016 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:
IEC 60958 NOTE Harmonized in EN 60958 series.
IEC 60958-3 NOTE Harmonized as EN 60958-3.

2

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SIST EN 60958-4-4:2016
EN 60958-4-4:2016
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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
IEC 60268-12 -  Sound system equipment - EN 60268-12 -
Part 12: Application of connectors for
broadcast and similar use
IEC 60603-7 series Connectors for electronic equipment - EN 60603-7 series
Part 7: Detail specification for 8-way,
unshielded, free and fixed connectors
IEC 60958-1 2008 Digital audio interface - EN 60958-1 2008
Part 1: General
+ A1 2014 +A1 2014
IEC 60958-4-1 -  Digital audio interface - EN 60958-4-1 -
Part 4-1: Professional applications -
Audio content
IEC 60958-4-2 -  Digital audio interface - EN 60958-4-2 -
Part 4-2: Professional applications -
Metadata and subcode
IEC 61169-8 -  Radio-frequency connectors - EN 61169-8 -
Part 8: Sectional specification - RF
coaxial connectors with inner diameter
of outer conductor 6,5 mm (0,256 in)
with bayonet lock - Characteristics
impedance 50 ohms (type BNC)
ISO/IEC 11801 -  Information technology - Generic cabling - -
for customer premises

3

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SIST EN 60958-4-4:2016

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SIST EN 60958-4-4:2016



IEC 60958-4-4

®


Edition 1.0 2016-03




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Digital audio interface –

Part 4-4: Professional applications – Physical and electrical parameters




Interface audionumérique –

Partie 4-4: Applications professionnelles – Paramètres physiques et électriques

















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.160.30 ISBN 978-2-8322-3233-0



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 60958-4-4:2016
– 2 – IEC 60958-4-4:2016  IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 7
4 Common features . 8
5 Jitter . 8
5.1 Output interface jitter . 8
5.1.1 General . 8
5.1.2 Intrinsic jitter . 8
5.1.3 Jitter gain . 9
5.2 Receiver jitter tolerance . 10
Annex A (informative) Symbol rates and UI . 11
Annex B (normative) Balanced transmission . 12
B.1 General characteristics . 12
B.1.1 Configuration . 12
B.1.2 Equalisation . 12
B.1.3 Cable . 12
B.2 Line driver characteristics . 13
B.2.1 Output impedance . 13
B.2.2 Signal amplitude . 13
B.2.3 Balance . 13
B.2.4 Rise and fall times . 13
B.3 Line receiver characteristics . 13
B.3.1 Terminating impedance . 13
B.3.2 Maximum input signals . 14
B.3.3 Minimum input signals . 14
B.3.4 Receiver equalization . 14
B.3.5 Common-mode rejection . 15
B.4 Connector . 15
B.4.1 XLR connector . 15
B.4.2 8-way modular connector . 15
Annex C (normative) Coaxial transmission . 17
C.1 General . 17
C.2 Line driver characteristics . 17
C.2.1 General . 17
C.2.2 Output impedance . 17
C.2.3 Signal characteristics . 17
C.3 Coaxial cable characteristics . 18
C.4 Line receiver characteristics . 18
C.4.1 General . 18
C.4.2 Terminating impedance . 19
C.4.3 Maximum input signals . 19
C.4.4 Minimum input signals . 19
C.5 Connector . 20

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SIST EN 60958-4-4:2016
IEC 60958-4-4:2016  IEC 2016 – 3 –
Annex D (informative) Optical transmission . 21
D.1 Short haul . 21
D.2 Medium haul . 21
D.3 Long haul . 21
Bibliography . 22

Figure 1 – Intrinsic-jitter measurement-filter characteristic . 9
Figure 2 – Jitter transfer-function mask . 10
Figure 3 – Jitter tolerance template . 10
Figure B.1 – Simplified example of the configuration of the circuit (balanced) . 12
Figure B.2 – Eye diagram, balanced receiver . 14
Figure B.3 – Suggested equalizing characteristic for a receiver operating at 48 kHz
frame rate . 15
Figure C.1 – Output signal waveform . 17
Figure C.2 – Eye diagram, coaxial receiver . 19
Figure C.3 – Eye pattern for long-distance transmission . 20

Table A.1 – Symbol rate versus sampling frequency . 11
Table A.2 – UI (ns) versus sampling frequency . 11
Table C.1 – Output signal characteristics . 18

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SIST EN 60958-4-4:2016
– 4 – IEC 60958-4-4:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

DIGITAL AUDIO INTERFACE –

Part 4-4: Professional applications –
Physical and electrical parameters

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.
International Standard IEC 60958-4-4 has been prepared by technical area 4: Digital system
interfaces and protocols, of IEC technical committee 100: Audio, video and multimedia
systems and equipment.
This first edition, together with IEC 60958-4-1 and IEC 60958-4-2, cancels and replaces the
IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical
revision.
This edition includes the following significant technical changes with respect to
IEC 60958-4:2003 with its Amendment 1:2008:
a) support for a wider range of physical media;
b) support for a wider range of audio sampling frequencies;
c) deprecation of “minimum implementation” of channel status data.

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SIST EN 60958-4-4:2016
IEC 60958-4-4:2016  IEC 2016 – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
100/2454/CDV 100/2583/RVC

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN 60958-4-4:2016
– 6 – IEC 60958-4-4:2016  IEC 2016
INTRODUCTION
The two-channel digital audio interface has been widely used in a variety of professional
audio applications that have reached beyond the vision of the original standard. In particular,
applications using increased sampling frequencies and alternative physical media.
Separating the standard into independently-maintainable parts allows, for example, additional
transmission media to be introduced in the future by revising IEC 60958-4-4 without affecting
the other parts of the IEC 60958-4 series. The parts comprise:
Part 4-1: Audio content: defines the format for coding audio used for the audio content. It
specifies the semantics of the audio data, including the "validity" flag. It also
specifies the sampling frequency by reference to AES5.
Part 4-2: Metadata and subcode: specifies the format for information, metadata, or subcode
transmitted with the audio data: principally the channel status but also user data
and the auxiliary bits. Implementors will note that the current implementation
options ("Standard" and "Enhanced") both require that status data be
implemented correctly in compliant equipment.
Part 4-4: Physical and electrical parameters: specifies the physical signals that convey the
bit stream specified in IEC 60958-1. The transport format is intended for use with
shielded twisted-pair cable of conventional design over distances of up to 100 m
at frame rates of up to 50 kHz. Longer cable lengths and higher frame rates may
be used, but with a rapidly increasing requirement for care in cable selection and
possible receiver equalization, or the use of active repeaters. Provision is made in
this standard for adapting the balanced terminals to use 75 Ω coaxial cable.
Transmission by fibre-optic cable is under consideration.

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SIST EN 60958-4-4:2016
IEC 60958-4-4:2016  IEC 2016 – 7 –
DIGITAL AUDIO INTERFACE –

Part 4-4: Professional applications –
Physical and electrical parameters



1 Scope
This part of IEC 60958 specifies the physical and electrical parameters for different media.
This part together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-2 specify an interface
for the serial digital transmission of two channels of periodically sampled and linearly
represented digital audio data from one transmitter to one receiver.
The transport format defined in IEC 60958-1 is intended for use with shielded twisted-pair
cable of conventional design over distances of up to 100 m without transmission equalization
or any special equalization at the receiver and at frame rates of up to 50 kHz. Longer cable
lengths and higher frame rates may be used, but with a rapidly increasing requirement for
care in cable selection and possible receiver equalization or the use of active repeaters, or
both. Provision is made in this standard for adapting the balanced terminals to use 75 Ω
coaxial cable, and transmission by fibre-optic cable is under consideration. This standard
does not cover connection to any common carrier equipment. In this interface specification,
an interface for consumer use is also mentioned. The two interfaces are not identical.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60268-12, Sound system equipment – Part 12: Application of connectors for broadcast
and similar use
IEC 60603-7 (all parts), Connectors for electronic equipment – Part 7: Detail specification for
8-way, unshielded, free and fixed connectors
IEC 60958-1:2008, Digital audio interface – Part 1: General
IEC 60958-1:2008/AMD1:2014
IEC 60958-4-1, Digital audio interface – Part 4-1: Professional applications – Audio content
IEC 60958-4-2, Digital audio interface – Part 4-2: Professional applications – Metadata and
subcode
IEC 61169-8, Radio-frequency connectors – Part 8: Sectional specification – RF coaxial
connectors with inner diameter of outer conductor 6,5 mm (0,256 in) with bayonet lock –
Characteristic impedance 50 Ω (type BNC)
ISO/IEC 11801, Information technology – Generic cabling for customer premises
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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SIST EN 60958-4-4:2016
– 8 – IEC 60958-4-4:2016  IEC 2016
3.1
unit interval
UI
shortest nominal time interval in the coding scheme
Note 1 to entry: There are 128 UI in a sample frame. See Annex A.
Note 2 to entry: This note applies to the French language only.
3.2
interface jitter
deviation in timing of interface data transitions (zero crossings) when measured with respect
to an ideal clock
3.3
intrinsic jitter
output interface jitter of a device that is either free-running or synchronized to a jitter-free
reference
3.4
jitter gain
ratio of the amplitude of jitter at the synchronization input of a device to the resultant jitter at
the output of the device
Note 1 to entry: This definition excludes the effect of intrinsic jitter.
Note 2 to entry: The ratio is expressed in decibels.
3.5
frame rate
frequency at which frames are transmitted
4 Common features
All interfaces shall be subject to the common jitter requirements in accordance with Clause 5.
Other parameters shall comply with the transmission type specified.
The interface should use the balanced transmission format specified in Annex B. The
interface may use the format specified in Annex C or one of the alternative transmission
formats to be specified in a future edition (see Annex D).
5 Jitter
5.1 Output interface jitter
5.1.1 General
Jitter at the output of a device shall be measured as the sum of the jitter intrinsic to the device
and jitter being passed through from the timing reference of the device.
5.1.2 Intrinsic jitter
The peak value of the intrinsic jitter at the output of the interface, measured at all the
transition zero crossings shall be less than 0,025 UI when measured with the intrinsic-jitter
measurement filter.
The following aspects have to be considered.

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SIST EN 60958-4-4:2016
IEC 60958-4-4:2016  IEC 2016 – 9 –
• This jitter may be strongly asymmetric and the deviation from the ideal timing should meet
the specification in either direction.
• This requirement applies both when the equipment is locked to an effectively jitter-free
timing reference, which may be a modulated digital audio signal, and when the equipment
is free-running.
• The intrinsic-jitter measurement-filter characteristic is shown in Figure 1. It shows a
minimum-phase high-pass filter with 3 dB attenuation at 700 Hz, a first order roll-off to
70 Hz and with a pass-band gain of unity.
10
0
700 Hz, –3 dB
–10
–20
70 Hz, –20 dB
–30
4 5 6 7
10 100 1 000 10 10 10 10
Jitter frequency (Hz)
IEC

Figure 1 – Intrinsic-jitter measurement-filter characteristic
5.1.3 Jitter gain
The sinusoidal jitter gain from any timing reference input to the signal output shall be less
than 2 dB at all frequencies.
If jitter attenuation is provided and it is such that the sinusoidal jitter gain falls below the jitter
transfer function mask of Figure 2 then the equipment specification should state that the
equipment jitter attenuation is within the specification of this standard. The mask imposes no
additional limit on low-frequency jitter gain. The limit starts at the input-jitter frequency of
500 Hz where it is 0 dB, and falls to –6 dB at and above 1 kHz.
Gain (dB)

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SIST EN 60958-4-4:2016
– 10 – IEC 60958-4-4:2016  IEC 2016
10
500 Hz, 0 dB
0
1 000 Hz, –6 dB
–10
4 5 6 7
10 100 1 000 10 10 10 10
Jitter frequency (Hz)

IEC
Figure 2 – Jitter transfer-function mask
5.2 Receiver jitter tolerance
An interface data receiver should correctly decode an incoming data stream with any
sinusoidal jitter defined by the jitter tolerance template of Figure 3.
The template requires a jitter tolerance of 0,25 UI peak-to-peak at high frequencies,
increasing with the inverse of frequency below 8 kHz to level off at 10 UI peak-to-peak below
200 Hz.
100
200 Hz
10
(UI)
Tolerance
1
8 000 Hz
0,25 UI
0,1
4 5 6 7
10 100 1 000
10 10 10 10
Jitter frequency (Hz)
IEC

Figure 3 – Jitter tolerance template

Tolerance (UI)
Gain (dB)

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SIST EN 60958-4-4:2016
IEC 60958-4-4:2016  IEC 2016 – 11 –
Annex A
(informative)

Symbol rates and UI

Demands on the performance of the interface are determined by the frame rate, which is in
turn determined by the audio sampling frequency. AES5 recommends a set of sampling
frequencies referred to a basic rate of 48 kHz with options to use 44,1 kHz or 32 kHz. These
basic rates may be scaled by certain multiples to achieve higher or lower sampling
frequencies.
Table A.1 and Table A.2 illustrate how the symbol rate at the interface, and the UI, change
with different sampling-frequency multiples.
Table A.1 – Symbol rate versus sampling frequency
Sampl
...