EN 61938:2013

Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability

IEC 61938:2013 gives guidance on current practice for the characteristics of multimedia analogue interfaces to achieve interoperability between equipment from different manufacturers. It is not a performance standard. This second edition cancels and replaces the first edition published in 1996 and constitutes a technical revision. It includes the following significant technical changes: - the values in each table were chosen with respect to the state of the art and representative of best practice in industry; - plug-in power systems and soundcard power systems are added; - a new subclause 12.3 has been created: Interoperability of portable audio headphones/earphones and portable audio equipment; - a new Annex A describing pairing and screening of conductors is added; - a new Annex B describing phantom power variants for specialized applications is also added.

Multimedia Systeme - Leitfaden für empfohlene Charakteristika analoger Schnittstellen zur Erreichung von Kompatibilität

Systèmes multimédia - Guide des caractéristiques recommandées des interfaces analogiques permettant d'obtenir l'interopérabilité

La CEI 61938:2013 donne des directives relatives à la pratique courante en ce qui concerne les caractéristiques des interfaces analogiques multimédia permettant d'obtenir l'interopérabilité entre des matériels provenant de fabricants différents. Il ne s'agit pas d'une norme de performance. Cette deuxième édition annule et remplace la première édition parue en 1996 et constitue une révision technique. Elle inclut les modifications techniques suivantes: - les valeurs de chaque tableau ont été choisies en tenant compte de l'état de l'art représentatif de la meilleure pratique en industrie; - un système d'alimentation enfichable et un système d'alimentation de carte son ont été ajoutés; - un nouveau paragraphe 12.3 a été créé: Interopérabilité des casques audio/écouteurs portables et matériels audio portables; - une nouvelle Annexe A décrivant l'appariement et le blindage des conducteurs a été ajoutée; - une nouvelle Annexe B décrivant les variantes d'alimentation fantôme pour applications spécialisées a également été ajoutée.

Večpredstavnostni sistemi - Navodilo za priporočene karakteristike analognih vmesnikov, ki omogočajo medobratovalnost (IEC 61938:2013)

Ta mednarodni standard podaja smernice glede trenutne prakse za karakteristike večpredstavnostnih analognih vmesnikov, ki omogočajo medobratovalnost opreme različnih proizvajalcev. To ni standard učinkovitosti. Priporočila za vmesnike za opremo, ki se uporablja v vozilih, ter za analogne video vmesnike za oddajno in podobno opremo, niso podana. Za medsebojno povezavo digitalnih signalov glej standard IEC 60958. Shema na sliki 1 prikazuje možne vmesnike avdio in video virov ter ciljev.

General Information

• Status: Withdrawn
• Publication Date: 05-Sep-2013
• Withdrawal Date: 31-Jul-2016
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: CLC/TC 100X - Audio, video and multimedia systems and equipment and related sub-systems
• Drafting Committee: IEC/TC 100 - IEC_TC_100
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 03-Sep-2018
• Completion Date: 03-Sep-2018
• Ref Project: SIST EN 61938:2013 - Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability (IEC 61938:2013)

Relations

• Replaces: EN 61938:1997 - Audio, video and audiovisual systems - Interconnections and matching values - Preferred matching values of analogue signals
• Effective Date: 29-Jan-2023
• Replaced By: EN IEC 61938:2018 - Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability
• Effective Date: 20-Sep-2016

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2013
1DGRPHãþD
SIST EN 61938:1999
9HþSUHGVWDYQRVWQLVLVWHPL1DYRGLOR]DSULSRURþHQHNDUDNWHULVWLNHDQDORJQLK
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Multimedia systems - Guide to the recommended characteristics of analogue interfaces
to achieve interoperability (IEC 61938:2013)
Multimedia Systeme - Leitfaden für empfohlene Charakteristiken analoger Schnittstellen
zur Erreichung von Kompatibilität (IEC 61938:2013)
Systèmes multimédia - Guide des caractéristiques recommandées des interfaces
analogiques permettant d'obtenir l'interopérabilité (CEI 61938:2013)
Ta slovenski standard je istoveten z: EN 61938:2013
ICS:
33.160.60 9HþSUHGVWDYQLPXOWLPHGLMVNL Multimedia systems and
VLVWHPLLQRSUHPD]D teleconferencing equipment
WHOHNRQIHUHQFH
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61938
NORME EUROPÉENNE
September 2013
EUROPÄISCHE NORM
ICS 33.160.01; 35.200 Supersedes EN 61938:1997

English version
Multimedia systems -
Guide to the recommended characteristics
of analogue interfaces to achieve interoperability
(IEC 61938:2013)
Systèmes multimédia -  Multimedia Systeme -
Guide des caractéristiques Leitfaden für empfohlene Charakteristiken
recommandées des interfaces analoger Schnittstellen zur Erreichung von
analogiques permettant d'obtenir Kompatibilität
l'interopérabilité (IEC 61938:2013)
(CEI 61938:2013)
This European Standard was approved by CENELEC on 2013-08-01. 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.

CENELEC
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

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61938:2013 E
Foreword
The text of document 100/2130/FDIS, future edition 2 of IEC 61938, 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 61938:2013.

The following dates are fixed:
(dop) 2014-05-01
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2016-08-01
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61938:1997.

– the main title was changed to: Multimedia systems - Guide to the recommended characteristics of
analogue interfaces to achieve interoperability;
– the scope was adapted to the title;
– a new introduction has been added. The necessity of the above revisions is mentioned in this
introduction;
– the values in each table were chosen with respect to the state of the art and representative of best
practice in industry;
– plug-in power systems and soundcard power systems are added;
– a new Subclause 12.3 has been created: Interoperability of portable audio headphones /earphones
and portable audio equipment;
– a new Annex A describing pairing and screening of conductors is added;
– a new Annex B describing phantom power variants for specialized applications is also added.

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 61938:2013 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 60027 Series NOTE Harmonised as EN 60027 Series (not modified).
IEC 61293:1994 NOTE Harmonised as EN 61293:1994 (not modified).

- 3 - EN 61938:2013
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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60038 2009 IEC standard voltages EN 60038 2011
(mod)
IEC 60094-2 1994 Magnetic tape sound recording and EN 60094-2 1995
+ corr. March 1995 reproducing systems -
Part 2: Calibration tapes
IEC 60107-6 1989 Recommended methods of measurement HD 567.6 S1 1990
on receivers for television broadcast
transmissions -
Part 6: Measurements under conditions
different from broadcast signal standards

IEC 60130-9 2011 Connectors for frequencies below 3 MHz - EN 60130-9 2011
Part 9: Circular connectors for radio and
associated sound equipment
IEC 60268-1 1985 Sound system equipment - HD 483.1 S2 1989
1)
+ A1 1988 Part 1: General - -
+ A2 1988 - -
IEC 60268-3 2000 Sound system equipment - EN 60268-3 2000
2)
Part 3: Amplifiers + corr. January 2002

IEC 60268-5 2003 Sound system equipment - EN 60268-5 2003
+ A1 2007 Part 5: Loudspeakers + A1 2009

IEC 60268-7 2010 Sound system equipment - EN 60268-7 2011
Part 7: Headphones and earphones

IEC 60268-11 1987 Sound system equipment - HD 483.11 S3 1993
+ A1 1989 Part 11: Application of connectors for the - -
3)
+ A2 1991 interconnection of sound system - -
components
IEC 60268-12 1987 Sound system equipment - EN 60268-12 1995
4)
+ A1 1991 Part 12: Application of connectors for - -

+ A2 1994 broadcast and similar use + A2 1995

IEC 60603-11 1992 Connectors for frequencies below 3 MHz - -
for use with printed boards -
Part 11: Detail specification for concentric
connectors (dimensions for free connectors
and fixed connectors)
1)
HD 483.1 S2 includes A1 to IEC 60268-1.
2)
EN 60268-3 is superseded by EN 60268-3:2013, which is based on IEC 60268-3:2013.
3)
HD 483.11 S3 includes A1 + A2 to IEC 60268-11.
4)
EN 60268-12 includes A1 to IEC 60268-12.

Publication Year Title EN/HD Year
IEC 60958 Series Digital audio interface EN 60958 Series

ITU-R BT.1700 2005 Characteristics of composite video signals - -
for conventional analogue television systems

IEC 61938 ®
Edition 2.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Multimedia systems – Guide to the recommended characteristics of analogue

interfaces to achieve interoperability

Systèmes multimédia – Guide des caractéristiques recommandées des

interfaces analogiques permettant d'obtenir l'interopérabilité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 33.160.60; 35.200 ISBN 978-2-83220-836-6

– 2 – 61938 © IEC:2013
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 10
3 Terms and definitions . 10
4 General conditions. 13
5 Power supply . 13
5.1 Alternating current (a.c.) power supply voltages and frequencies . 13
5.2 Direct current (d.c.) power supply voltages . 13
5.3 Power supply feed for microphones . 14
6 Interconnections . 14
6.1 Connections . 14
6.1.1 General . 14
6.1.2 Characteristics of cables . 14
6.2 Connectors . 15
7 Marking and symbols for marking . 16
7.1 Marking . 16
7.2 Symbols for marking . 16
8 Electrical recommended values . 16
8.1 General purpose output/input . 16
8.2 General purpose audio output/input . 16
8.2.1 Audio-only interfaces for consumer equipment . 16
8.2.2 Interfaces for professional equipment and consumer equipment
where audio and video signals are present on the same connector or
cable . 18
8.3 General purpose video input/output . 19
9 Interoperability of microphones and amplifiers . 19
9.1 Microphones (excluding piezoelectric types) . 19
9.2 Power supply feed for electret microphones fed over a signal conductor
(“plug-in power”) . 20
9.3 Power supply feed for electret microphones fed by a separate conductor
(“soundcard power” or “PC power”) . 21
9.4 Phantom supply system . 21
9.4.1 General . 21
9.4.2 Supply voltage polarity . 22
9.4.3 Circuit diagram . 22
9.4.4 Value of the supply voltage . 22
9.4.5 Supply current . 22
9.4.6 Marking . 22
9.5 A-B supply system . 23
9.5.1 General . 23
9.5.2 Output impedance of the microphone . 23
9.5.3 Circuit diagram . 23
9.5.4 Connection of the power supply to earth . 23
9.5.5 Marking . 23
9.6 Polarity of the audio frequency voltage . 23

61938 © IEC:2013 – 3 –
10 Interoperabi
...