Conference systems — Equipment — Requirements

This document specifies requirements for typical conference systems, the parts they are composed of, the auxiliary devices necessary for their use (such as microphones, headphones, and sound reinforcement equipment) and the environment in which they are used. These requirements ensure interoperability and optimum performance under conditions of normal operation. It is applicable to both wired and wireless systems. The environment and areas where events are held are described in Annex A. This document facilitates the determination of the quality of conference systems, the comparison of different systems and the assessment of their proper use by listing their characteristics. This document contains the technical backbone of ISO 20108 and ISO 20109.

Systèmes de conférence — Équipement — Exigences

Ce document spécifie les exigences des systèmes-types de conférence, les parties dont ils sont composés, les dispositifs auxiliaires nécessaires à leur utilisation (tels que les microphones, les écouteurs, et l'équipement d'amplification sonore) et l'environnement dans lequel ils sont utilisés. Ces exigences assurent une interopérabilité et une performance optimale dans des conditions de fonctionnement normal. Il est applicable aux systèmes filaires et sans fil. L'environnement et les espaces dans lesquels des événements sont tenus sont décrits à l'Annexe A. Ce document permet de déterminer la qualité des systèmes de conférence, la comparaison de différents systèmes et l'évaluation de leur bonne utilisation en listant leurs caractéristiques. Ce document contient la base technique des normes ISO 20108 et ISO 20109.s

Konferenčni sistemi - Oprema - Zahteve

Ta dokument določa zahteve za tipične konferenčne sisteme, njihove sestavne dele, pomožne naprave, potrebne za njihovo uporabo (na primer mikrofone, slušalke in opremo za ojačanje zvoka) ter okolje, v katerem se uporabljajo. Te zahteve zagotavljajo interoperabilnost in optimalno delovanje v pogojih normalnega delovanja.
Uporablja se tako za žične kot za brezžične sisteme.
Okolje in območja, kjer potekajo prireditve, so opisana v dodatku A.
Ta dokument olajšuje ugotavljanje kakovosti konferenčnih sistemov, primerjavo različnih sistemov in oceno njihove pravilne uporabe z navedbo njihovih značilnosti. Ta dokument vsebuje tehnično podlago standardov ISO 20108 in ISO 20109.

General Information

Status
Published
Publication Date
04-Apr-2019
Current Stage
6060 - International Standard published
Completion Date
05-Apr-2019

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SLOVENSKI STANDARD
SIST ISO 22259:2019
01-oktober-2019
Konferenčni sistemi - Oprema - Zahteve
Conference systems -- Equipment -- Requirements
Systèmes de conférence -- Équipement -- Exigences
Ta slovenski standard je istoveten z: ISO 22259:2019
ICS:
33.160.60 Večpredstavni (multimedijski) Multimedia systems and
sistemi in oprema za teleconferencing equipment
telekonference
91.040.10 Javne stavbe Public buildings
SIST ISO 22259:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 22259:2019
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SIST ISO 22259:2019
INTERNATIONAL ISO
STANDARD 22259
First edition
2019-04
Conference systems — Equipment —
Requirements
Systèmes de conférence — Équipement — Exigences
Reference number
ISO 22259:2019(E)
ISO 2019
---------------------- Page: 3 ----------------------
SIST ISO 22259:2019
ISO 22259:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 22259:2019
ISO 22259:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Overall conference system ......................................................................................................................................................................... 5

4.1 General ........................................................................................................................................................................................................... 5

4.2 Audio characteristics ......................................................................................................................................................................... 5

4.2.1 Latency ..................................................................................................................................................................................... 5

4.2.2 Sound pressure level .................................................................................................................................................... 5

4.2.3 System input and output ........................................................................................................................................... 6

4.2.4 Frequency response ...................................................................................................................................................... 6

4.2.5 Distortion ............................................................................................................................................................................... 6

4.2.6 Noise and hum ................................................................................................................................................................... 6

4.2.7 Level consistency ............................................................................................................................................................. 6

4.2.8 Interference .......................................................................................................................................................................... 6

4.3 Confidentiality ......................................................................................................................................................................................... 6

4.4 Markings and symbols ...................................................................................................................................................................... 7

4.5 Accessibility and usability ............................................................................................................................................................. 7

5 Discussion system ............................................................................................................................................................................................... 7

5.1 General ........................................................................................................................................................................................................... 7

5.2 Discussion unit ........................................................................................................................................................................................ 7

5.2.1 Required elements ......................................................................................................................................................... 7

5.2.2 Additional elements ...................................................................................................................................................... 7

5.2.3 Optional features ............................................................................................................................................................. 8

5.2.4 Autonomy ............................................................................................................................................................................... 8

5.3 Microphone management.............................................................................................................................................................. 8

5.4 Microphone routing ............................................................................................................................................................................ 8

5.5 Microphone processing ................................................................................................................................................................... 8

6 Individual listening systems ..................................................................................................................................................................... 8

6.1 General ........................................................................................................................................................................................................... 8

6.2 Earclip headphone ............................................................................................................................................................................... 9

6.3 In-ear headphone ................................................................................................................................................................................. 9

6.4 Headphones ............................................................................................................................................................................................... 9

6.5 Individual induction loop ......... ...................................................................................................................................................... 9

7 Sound reinforcement system ................................................................................................................................................................... 9

8 Interpreting system ........................................................................................................................................................................................10

9 Language distribution system .............................................................................................................................................................10

10 Metadata system ................................................................................................................................................................................................10

11 Voting system ........................................................................................................................................................................................................10

12 Camera system .....................................................................................................................................................................................................10

13 Display system .....................................................................................................................................................................................................11

14 Identification/sign-in system ...............................................................................................................................................................11

15 Conference control system ......................................................................................................................................................................11

16 Recording/archiving system .................................................................................................................................................................11

17 Webcasting system ..........................................................................................................................................................................................12

18 Teleconferencing system ...........................................................................................................................................................................12

© ISO 2019 – All rights reserved iii
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SIST ISO 22259:2019
ISO 22259:2019(E)

19 Combining of conference halls and distant connections .........................................................................................12

20 Split rooms ...............................................................................................................................................................................................................12

21 Diagnostics ..............................................................................................................................................................................................................12

22 Interoperability ..................................................................................................................................................................................................12

Annex A (informative) Meeting and conference hall setups .....................................................................................................13

Annex B (informative) Routing modes of a conference system .............................................................................................21

Annex C (informative) Modes of mounting conference systems ...........................................................................................25

Annex D (normative) Microphone management ..................................................................................................................................26

Annex E (informative) Camera system.............................................................................................................................................................28

Annex F (informative) Display system .............................................................................................................................................................29

Bibliography .............................................................................................................................................................................................................................32

iv © ISO 2019 – All rights reserved
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SIST ISO 22259:2019
ISO 22259:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electro technical Commission (IEC) on all matters of

electro technical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 37, Language and terminology,

Subcommittee SC 5, Translation, interpreting and related technology.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v
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SIST ISO 22259:2019
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SIST ISO 22259:2019
INTERNATIONAL STANDARD ISO 22259:2019(E)
Conference systems — Equipment — Requirements
1 Scope

This document specifies requirements for typical conference systems, the parts they are composed

of, the auxiliary devices necessary for their use (such as microphones, headphones, and sound

reinforcement equipment) and the environment in which they are used. These requirements ensure

interoperability and optimum performance under conditions of normal operation.
It is applicable to both wired and wireless systems.
The environment and areas where events are held are described in Annex A.

This document facilitates the determination of the quality of conference systems, the comparison of

different systems and the assessment of their proper use by listing their characteristics. This document

contains the technical backbone of ISO 20108 and ISO 20109.
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.

ISO 639-3, Codes for the representation of names of languages — Part 3: Alpha-3 code for comprehensive

coverage of languages

ISO 20108, Simultaneous interpreting — Quality and transmission of sound and image input —

Requirements
ISO 7000, Graphical symbols for use on equipment — Registered symbols

IEC 60118-4, Electroacoustics — Hearing aids — Part 4: Induction-loop systems for hearing aid purposes —

System performance requirements
IEC 60268-4, Sound system equipment — Part 4: Microphones
IEC 60268-7, Sound system equipment — Part 7: Headphones and earphones
IEC 60417, Graphical symbols for use on equipment

IEC 61603-7, Transmission systems of audio and/or video and related signals using infra-red radiation —

Part 7: Digital audio signals for conference and similar applications

IEC 62489-1, Electroacoustics — Audio-frequency induction loop systems for assisted hearing — Part 1:

Methods of measuring and specifying the performance of system components
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:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
© ISO 2019 – All rights reserved 1
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SIST ISO 22259:2019
ISO 22259:2019(E)
3.1
system
combination of interacting elements organized to achieve a given objective

[SOURCE: ISO/IEC 30111:2013, 3.6, modified — the wording “one or more stated purposes” is changed

to “a given objective”.]
3.2
wired
employing cables and connectors for the transfer of signals (3.12) and data
3.3
wireless
without cables and connectors for the transfer of signals (3.12) and data
3.4
discussion system
system (3.1) that controls discussion units (3.23)
3.5
sound reinforcement system
speech reinforcement system
public address system
system (3.1) that amplifies sound (3.11)
3.6
conference system
system (3.1) that controls technical equipment used to conduct an event
3.7
language distribution

transmission of the floor (3.9) and interpreted (3.32) speech to participants (3.25) and audience (3.28)

3.8
interpreting system

combination of interpreting (3.33) equipment and system (3.1) for language distribution (3.7)

Note 1 to entry: An interpreting system can require the use of interpreting booths compliant with ISO 2603

or ISO 4043, equipped with interpreting consoles compliant with ISO 20109, or a portable interpreting system

compliant with ISO 20109.
3.9
floor

audio output of discussion system (3.4) conveying microphone (3.14) input and auxiliary input (3.10)

3.10
auxiliary input
audio input other than that from discussion system (3.4) microphones (3.14)
3.11
sound
form of energy that moves through media in waves of pressure
[SOURCE: ISO/TS 16976-7:2013, 3.1.5]
3.12
signal
detectable transmitted energy that is used to carry information
[SOURCE: ISO/IEC 14776-153:2015, 3.1.87]
2 © ISO 2019 – All rights reserved
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SIST ISO 22259:2019
ISO 22259:2019(E)
3.13
transducer
device that converts one type of energy to another
[SOURCE: ISO/TS 19130-2:2014, 4.78]
3.14
microphone
transducer (3.13) that converts sound (3.11) into an electrical signal (3.12)

[SOURCE: ISO 20109:2016, 3.3, modified — The word “device” is replaced by “transducer”.]

3.15
loudspeaker

transducer (3.13) that converts an electrical signal (3.12) into sound (3.11) that is loud enough to be

heard at a distance
3.16
amplifier
electronic device that converts a small signal (3.12) to a larger signal

[SOURCE: ISO 5577:2017, 5.1.5, modified — The word “which” is replaced by “that”; Note 1 to entry is

removed.]
3.17
headphone

transducer (3.13) that converts an electrical signal (3.12) into sound (3.11), designed to be worn close

to the ear

[SOURCE: ISO 20109:2016, 3.4, modified — the plural term “headphones” is replaced by the singular

“headphone”, the word “device” is replaced by “transducer”.]
3.18
in-ear headphone
headphone (3.17) designed to be worn inside the ear
3.19
earclip headphone
earshell headphone
one-ear headphone (3.17) designed to be worn attached to the ear
3.20
induction loop
system (3.1) that transmits an audio signal (3.12) directly to a hearing aid

Note 1 to entry: The audio signal is transmitted via a magnetic field, greatly reducing background noise,

competing sounds, reverberation and other acoustic distortions in order to improve the clarity of sound.

3.21
central controller

equipment that directs the operation of the conference system (3.6) and the systems (3.1) and devices

connected to it
3.22
audio mixing device

equipment for combining, routing and changing the gain, volume, timbre and dynamics of analogue or

digital signals (3.12), summing them to produce one or more combined output signals

3.23
discussion unit
electronic device serving a participant (3.25) to speak at an event
© ISO 2019 – All rights reserved 3
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SIST ISO 22259:2019
ISO 22259:2019(E)
3.24
control booth

room from which technical equipment and audio and video signal (3.12) quality are managed

[SOURCE: ISO 2603:2016, 3.3, modified — The wording “where the control instruments are located,

and” is deleted and “audio and video signal quality” added.]
3.25
participant
person who takes an active part in an event
3.26
chairperson
participant (3.25) who is in charge of conducting the proceedings at an event
3.27
speaker
participant (3.25) addressing others

[SOURCE: ISO 18841:2018, 3.1.7, modified — The word “person” is replaced by “participant”; the

wording “using either spoken language or sign language” is removed.]
3.28
audience
group of listeners or spectators at an event
3.29
operator
person responsible for the operation of technical equipment
3.30
technician
person responsible for the availability and maintenance of technical equipment
3.31
webcasting
web streaming
transmitting audio and video data across a network to an audience (3.28)
3.32
interpret

render spoken or signed information from a source language to a target language in oral or signed form,

conveying both the register and meaning of the source language content
[SOURCE: ISO 18841:2018, 3.1.1]
3.33
interpreting
interpretation

rendering of spoken or signed information from a source language to a target language in oral or signed

form, conveying both the register and meaning of the source language content
[SOURCE: ISO 18841:2018, 3.1.2]
3.34
simultaneous interpreting

mode of interpreting (3.33) performed while a speaker (3.27) is still speaking or signing

[SOURCE: ISO 18841:2018, 3.1.13]
4 © ISO 2019 – All rights reserved
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SIST ISO 22259:2019
ISO 22259:2019(E)
4 Overall conference system
4.1 General

A conference system consists of the technical equipment used to conduct an event. Its primary

function is to amplify audio signals from participants and audio sources and delivering them to other

participants.

A conference system shall at least consist of a discussion system, combined with a listening system

and/or a sound reinforcement system.

A conference system shall have at least one primary floor output and one auxiliary input as described

in Annex B.

A conference system can be extended with an interpreting system and a language distribution system.

A conference system may, among others, also include one or more of the following elements:

— a metadata system;
— a voting system;
— a camera system;
— a display system;
— an identification/sign-in system;
— an electronic nameplate system.

A conference system can, among others, be connected to one or more of the following elements:

— a conference control system;
— an audio and/or video recording/archiving system;
— a webcasting system;
— a teleconferencing system.

Audio and video signals generated by the conference system shall comply with ISO 20108.

Modes of mounting conference systems are described in Annex C.
4.2 Audio characteristics
4.2.1 Latency

The overall latency from input (microphone or audio input) to output (discussion unit loudspeaker,

headphones or audio output) shall not exceed 20 ms.
4.2.2 Sound pressure level

All sound pressure levels (dB ) referred to in this document are based on a sinusoidal frequency of

spl
1 kHz (unless specified otherwise) measured under free field conditions.
Sound pressure level Nominal Maximum Units
at the microphone housing/capsule 80 110 dB
spl
at 50 cm from the discussion unit 72 dB
spl
loudspeaker without causing audi-
ble artefacts
© ISO 2019 – All rights reserved 5
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SIST ISO 22259:2019
ISO 22259:2019(E)
4.2.3 System input and output
The nominal input and output of the system shall be −30 dBFS.
4.2.4 Frequency response

A conference system including microphone and individual listening system shall reproduce audio

frequencies between 125 Hz and 15 000 Hz with a variation of maximum ±10 dB.

A conference system excluding microphone and individual listening system shall reproduce audio

frequencies in the useful frequency range with a variation of maximum ±3 dB.

Additionally, a high-pass filter shall attenuate the frequencies below 125 Hz with a slope of at least

12 dB per octave in order to improve speech intelligibility.
Parameter Min. Typical Max. Unit
Low frequency limit 125 Hz
High frequency limit 15 000 Hz
Amplitude variation in the useful frequency range including micro-
±10 dB
phone and individual listening system
Amplitude variation in the useful frequency range excluding micro-
±3 dB
phone and individual listening system
High-pass filter corner frequency 125 Hz
High-pass filter slope 12 dB/Oct

Microphones shall comply with IEC 60268-4. Headphones shall comply with IEC 60268-7.

4.2.5 Distortion
A conference system shall be free of any perceptible audio distortion.

A conference system including a microphone shall exhibit a total harmonic distortion (THD) level below

1 % at any sound pressure levels up to 110 dB at 1 kHz.
spl
4.2.6 Noise and hum
A conference system shall be free of perceptible noise and hum.

A conference system including a microphone shall exhibit a signal to noise ratio (SNR) of at least 90 dB

at 1 kHz at the maximum sound pressure level.
4.2.7 Level consistency

The variation of the level of the individual listening system shall be no more than ±3 dB for each

distributed interpreted language and distributed floor at an input level of 80 dB ± 12 dB.

spl
4.2.8 Interference

A conference system shall be immune to interference from any source, including nearby electromagnetic

sources such as (but not limited to) mobile phones, wireless LANs and other conference systems.

Audible artefacts resulting from interference shall be at least 50 dB below the nominal level; system

noise shall not be considered as audible interference.
4.3 Confidentiality

A conference system can include features that warrant the confidentiality of the event, in particular

when wireless systems are used, the conference is accessible via webcasting or when the audio and/or

video are transmitted over a LAN/WAN.
6 © ISO 2019 – All rights reserved
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SIST ISO 22259:2019
ISO 22259:2019(E)
4.4 Markings and symbols

Markings and symbols shall be those identified in the collection of graphical symbols for use on

equipment that contains the complete set of graphical symbols included in IEC 60417 and ISO 7000.

Markings not included in this collection shall be clearly identified in the user manual.

4.5 Accessibility and usability

Physically impaired participants and audience members should be able to use all features of the

conference system without assistance (see ISO/IEC Guide 71 and ISO/TR 22411).
5 Discussion system
5.1 General

A discussion system consists of discussion units, often daisy-chained together and connected to a

central controller that can power the discussion units. It can be operated centrally by an operator and/

or in a decentralized way by the participants. In general, the number of discussion units is the same as

the number of participants; however, two participants can share one unit. The connection between the

discussion units and the central controller can be either wired or wireless.
The entire discussion system’s audio signal path shall be digital.
5.2 Discussion unit
5.2.1 Required elements
The unit shall contain:

— a microphone with a polar pattern that provides the best intelligibility, taking into account the

speaker's position, and that avoids ambient noises to be picked up;

— a microphone button that provides adequate haptic perception to locate it and haptic feedback to

operate it. The operation of the microphone button should not result in audible artefacts;

— an indicator nea
...

INTERNATIONAL ISO
STANDARD 22259
First edition
2019-04
Conference systems — Equipment —
Requirements
Systèmes de conférence — Équipement — Exigences
Reference number
ISO 22259:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 22259:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 22259:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Overall conference system ......................................................................................................................................................................... 5

4.1 General ........................................................................................................................................................................................................... 5

4.2 Audio characteristics ......................................................................................................................................................................... 5

4.2.1 Latency ..................................................................................................................................................................................... 5

4.2.2 Sound pressure level .................................................................................................................................................... 5

4.2.3 System input and output ........................................................................................................................................... 6

4.2.4 Frequency response ...................................................................................................................................................... 6

4.2.5 Distortion ............................................................................................................................................................................... 6

4.2.6 Noise and hum ................................................................................................................................................................... 6

4.2.7 Level consistency ............................................................................................................................................................. 6

4.2.8 Interference .......................................................................................................................................................................... 6

4.3 Confidentiality ......................................................................................................................................................................................... 6

4.4 Markings and symbols ...................................................................................................................................................................... 7

4.5 Accessibility and usability ............................................................................................................................................................. 7

5 Discussion system ............................................................................................................................................................................................... 7

5.1 General ........................................................................................................................................................................................................... 7

5.2 Discussion unit ........................................................................................................................................................................................ 7

5.2.1 Required elements ......................................................................................................................................................... 7

5.2.2 Additional elements ...................................................................................................................................................... 7

5.2.3 Optional features ............................................................................................................................................................. 8

5.2.4 Autonomy ............................................................................................................................................................................... 8

5.3 Microphone management.............................................................................................................................................................. 8

5.4 Microphone routing ............................................................................................................................................................................ 8

5.5 Microphone processing ................................................................................................................................................................... 8

6 Individual listening systems ..................................................................................................................................................................... 8

6.1 General ........................................................................................................................................................................................................... 8

6.2 Earclip headphone ............................................................................................................................................................................... 9

6.3 In-ear headphone ................................................................................................................................................................................. 9

6.4 Headphones ............................................................................................................................................................................................... 9

6.5 Individual induction loop ......... ...................................................................................................................................................... 9

7 Sound reinforcement system ................................................................................................................................................................... 9

8 Interpreting system ........................................................................................................................................................................................10

9 Language distribution system .............................................................................................................................................................10

10 Metadata system ................................................................................................................................................................................................10

11 Voting system ........................................................................................................................................................................................................10

12 Camera system .....................................................................................................................................................................................................10

13 Display system .....................................................................................................................................................................................................11

14 Identification/sign-in system ...............................................................................................................................................................11

15 Conference control system ......................................................................................................................................................................11

16 Recording/archiving system .................................................................................................................................................................11

17 Webcasting system ..........................................................................................................................................................................................12

18 Teleconferencing system ...........................................................................................................................................................................12

© ISO 2019 – All rights reserved iii
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ISO 22259:2019(E)

19 Combining of conference halls and distant connections .........................................................................................12

20 Split rooms ...............................................................................................................................................................................................................12

21 Diagnostics ..............................................................................................................................................................................................................12

22 Interoperability ..................................................................................................................................................................................................12

Annex A (informative) Meeting and conference hall setups .....................................................................................................13

Annex B (informative) Routing modes of a conference system .............................................................................................21

Annex C (informative) Modes of mounting conference systems ...........................................................................................25

Annex D (normative) Microphone management ..................................................................................................................................26

Annex E (informative) Camera system.............................................................................................................................................................28

Annex F (informative) Display system .............................................................................................................................................................29

Bibliography .............................................................................................................................................................................................................................32

iv © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 22259:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electro technical Commission (IEC) on all matters of

electro technical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 37, Language and terminology,

Subcommittee SC 5, Translation, interpreting and related technology.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 22259:2019(E)
Conference systems — Equipment — Requirements
1 Scope

This document specifies requirements for typical conference systems, the parts they are composed

of, the auxiliary devices necessary for their use (such as microphones, headphones, and sound

reinforcement equipment) and the environment in which they are used. These requirements ensure

interoperability and optimum performance under conditions of normal operation.
It is applicable to both wired and wireless systems.
The environment and areas where events are held are described in Annex A.

This document facilitates the determination of the quality of conference systems, the comparison of

different systems and the assessment of their proper use by listing their characteristics. This document

contains the technical backbone of ISO 20108 and ISO 20109.
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.

ISO 639-3, Codes for the representation of names of languages — Part 3: Alpha-3 code for comprehensive

coverage of languages

ISO 20108, Simultaneous interpreting — Quality and transmission of sound and image input —

Requirements
ISO 7000, Graphical symbols for use on equipment — Registered symbols

IEC 60118-4, Electroacoustics — Hearing aids — Part 4: Induction-loop systems for hearing aid purposes —

System performance requirements
IEC 60268-4, Sound system equipment — Part 4: Microphones
IEC 60268-7, Sound system equipment — Part 7: Headphones and earphones
IEC 60417, Graphical symbols for use on equipment

IEC 61603-7, Transmission systems of audio and/or video and related signals using infra-red radiation —

Part 7: Digital audio signals for conference and similar applications

IEC 62489-1, Electroacoustics — Audio-frequency induction loop systems for assisted hearing — Part 1:

Methods of measuring and specifying the performance of system components
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:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
© ISO 2019 – All rights reserved 1
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ISO 22259:2019(E)
3.1
system
combination of interacting elements organized to achieve a given objective

[SOURCE: ISO/IEC 30111:2013, 3.6, modified — the wording “one or more stated purposes” is changed

to “a given objective”.]
3.2
wired
employing cables and connectors for the transfer of signals (3.12) and data
3.3
wireless
without cables and connectors for the transfer of signals (3.12) and data
3.4
discussion system
system (3.1) that controls discussion units (3.23)
3.5
sound reinforcement system
speech reinforcement system
public address system
system (3.1) that amplifies sound (3.11)
3.6
conference system
system (3.1) that controls technical equipment used to conduct an event
3.7
language distribution

transmission of the floor (3.9) and interpreted (3.32) speech to participants (3.25) and audience (3.28)

3.8
interpreting system

combination of interpreting (3.33) equipment and system (3.1) for language distribution (3.7)

Note 1 to entry: An interpreting system can require the use of interpreting booths compliant with ISO 2603

or ISO 4043, equipped with interpreting consoles compliant with ISO 20109, or a portable interpreting system

compliant with ISO 20109.
3.9
floor

audio output of discussion system (3.4) conveying microphone (3.14) input and auxiliary input (3.10)

3.10
auxiliary input
audio input other than that from discussion system (3.4) microphones (3.14)
3.11
sound
form of energy that moves through media in waves of pressure
[SOURCE: ISO/TS 16976-7:2013, 3.1.5]
3.12
signal
detectable transmitted energy that is used to carry information
[SOURCE: ISO/IEC 14776-153:2015, 3.1.87]
2 © ISO 2019 – All rights reserved
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ISO 22259:2019(E)
3.13
transducer
device that converts one type of energy to another
[SOURCE: ISO/TS 19130-2:2014, 4.78]
3.14
microphone
transducer (3.13) that converts sound (3.11) into an electrical signal (3.12)

[SOURCE: ISO 20109:2016, 3.3, modified — The word “device” is replaced by “transducer”.]

3.15
loudspeaker

transducer (3.13) that converts an electrical signal (3.12) into sound (3.11) that is loud enough to be

heard at a distance
3.16
amplifier
electronic device that converts a small signal (3.12) to a larger signal

[SOURCE: ISO 5577:2017, 5.1.5, modified — The word “which” is replaced by “that”; Note 1 to entry is

removed.]
3.17
headphone

transducer (3.13) that converts an electrical signal (3.12) into sound (3.11), designed to be worn close

to the ear

[SOURCE: ISO 20109:2016, 3.4, modified — the plural term “headphones” is replaced by the singular

“headphone”, the word “device” is replaced by “transducer”.]
3.18
in-ear headphone
headphone (3.17) designed to be worn inside the ear
3.19
earclip headphone
earshell headphone
one-ear headphone (3.17) designed to be worn attached to the ear
3.20
induction loop
system (3.1) that transmits an audio signal (3.12) directly to a hearing aid

Note 1 to entry: The audio signal is transmitted via a magnetic field, greatly reducing background noise,

competing sounds, reverberation and other acoustic distortions in order to improve the clarity of sound.

3.21
central controller

equipment that directs the operation of the conference system (3.6) and the systems (3.1) and devices

connected to it
3.22
audio mixing device

equipment for combining, routing and changing the gain, volume, timbre and dynamics of analogue or

digital signals (3.12), summing them to produce one or more combined output signals

3.23
discussion unit
electronic device serving a participant (3.25) to speak at an event
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ISO 22259:2019(E)
3.24
control booth

room from which technical equipment and audio and video signal (3.12) quality are managed

[SOURCE: ISO 2603:2016, 3.3, modified — The wording “where the control instruments are located,

and” is deleted and “audio and video signal quality” added.]
3.25
participant
person who takes an active part in an event
3.26
chairperson
participant (3.25) who is in charge of conducting the proceedings at an event
3.27
speaker
participant (3.25) addressing others

[SOURCE: ISO 18841:2018, 3.1.7, modified — The word “person” is replaced by “participant”; the

wording “using either spoken language or sign language” is removed.]
3.28
audience
group of listeners or spectators at an event
3.29
operator
person responsible for the operation of technical equipment
3.30
technician
person responsible for the availability and maintenance of technical equipment
3.31
webcasting
web streaming
transmitting audio and video data across a network to an audience (3.28)
3.32
interpret

render spoken or signed information from a source language to a target language in oral or signed form,

conveying both the register and meaning of the source language content
[SOURCE: ISO 18841:2018, 3.1.1]
3.33
interpreting
interpretation

rendering of spoken or signed information from a source language to a target language in oral or signed

form, conveying both the register and meaning of the source language content
[SOURCE: ISO 18841:2018, 3.1.2]
3.34
simultaneous interpreting

mode of interpreting (3.33) performed while a speaker (3.27) is still speaking or signing

[SOURCE: ISO 18841:2018, 3.1.13]
4 © ISO 2019 – All rights reserved
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ISO 22259:2019(E)
4 Overall conference system
4.1 General

A conference system consists of the technical equipment used to conduct an event. Its primary

function is to amplify audio signals from participants and audio sources and delivering them to other

participants.

A conference system shall at least consist of a discussion system, combined with a listening system

and/or a sound reinforcement system.

A conference system shall have at least one primary floor output and one auxiliary input as described

in Annex B.

A conference system can be extended with an interpreting system and a language distribution system.

A conference system may, among others, also include one or more of the following elements:

— a metadata system;
— a voting system;
— a camera system;
— a display system;
— an identification/sign-in system;
— an electronic nameplate system.

A conference system can, among others, be connected to one or more of the following elements:

— a conference control system;
— an audio and/or video recording/archiving system;
— a webcasting system;
— a teleconferencing system.

Audio and video signals generated by the conference system shall comply with ISO 20108.

Modes of mounting conference systems are described in Annex C.
4.2 Audio characteristics
4.2.1 Latency

The overall latency from input (microphone or audio input) to output (discussion unit loudspeaker,

headphones or audio output) shall not exceed 20 ms.
4.2.2 Sound pressure level

All sound pressure levels (dB ) referred to in this document are based on a sinusoidal frequency of

spl
1 kHz (unless specified otherwise) measured under free field conditions.
Sound pressure level Nominal Maximum Units
at the microphone housing/capsule 80 110 dB
spl
at 50 cm from the discussion unit 72 dB
spl
loudspeaker without causing audi-
ble artefacts
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ISO 22259:2019(E)
4.2.3 System input and output
The nominal input and output of the system shall be −30 dBFS.
4.2.4 Frequency response

A conference system including microphone and individual listening system shall reproduce audio

frequencies between 125 Hz and 15 000 Hz with a variation of maximum ±10 dB.

A conference system excluding microphone and individual listening system shall reproduce audio

frequencies in the useful frequency range with a variation of maximum ±3 dB.

Additionally, a high-pass filter shall attenuate the frequencies below 125 Hz with a slope of at least

12 dB per octave in order to improve speech intelligibility.
Parameter Min. Typical Max. Unit
Low frequency limit 125 Hz
High frequency limit 15 000 Hz
Amplitude variation in the useful frequency range including micro-
±10 dB
phone and individual listening system
Amplitude variation in the useful frequency range excluding micro-
±3 dB
phone and individual listening system
High-pass filter corner frequency 125 Hz
High-pass filter slope 12 dB/Oct

Microphones shall comply with IEC 60268-4. Headphones shall comply with IEC 60268-7.

4.2.5 Distortion
A conference system shall be free of any perceptible audio distortion.

A conference system including a microphone shall exhibit a total harmonic distortion (THD) level below

1 % at any sound pressure levels up to 110 dB at 1 kHz.
spl
4.2.6 Noise and hum
A conference system shall be free of perceptible noise and hum.

A conference system including a microphone shall exhibit a signal to noise ratio (SNR) of at least 90 dB

at 1 kHz at the maximum sound pressure level.
4.2.7 Level consistency

The variation of the level of the individual listening system shall be no more than ±3 dB for each

distributed interpreted language and distributed floor at an input level of 80 dB ± 12 dB.

spl
4.2.8 Interference

A conference system shall be immune to interference from any source, including nearby electromagnetic

sources such as (but not limited to) mobile phones, wireless LANs and other conference systems.

Audible artefacts resulting from interference shall be at least 50 dB below the nominal level; system

noise shall not be considered as audible interference.
4.3 Confidentiality

A conference system can include features that warrant the confidentiality of the event, in particular

when wireless systems are used, the conference is accessible via webcasting or when the audio and/or

video are transmitted over a LAN/WAN.
6 © ISO 2019 – All rights reserved
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ISO 22259:2019(E)
4.4 Markings and symbols

Markings and symbols shall be those identified in the collection of graphical symbols for use on

equipment that contains the complete set of graphical symbols included in IEC 60417 and ISO 7000.

Markings not included in this collection shall be clearly identified in the user manual.

4.5 Accessibility and usability

Physically impaired participants and audience members should be able to use all features of the

conference system without assistance (see ISO/IEC Guide 71 and ISO/TR 22411).
5 Discussion system
5.1 General

A discussion system consists of discussion units, often daisy-chained together and connected to a

central controller that can power the discussion units. It can be operated centrally by an operator and/

or in a decentralized way by the participants. In general, the number of discussion units is the same as

the number of participants; however, two participants can share one unit. The connection between the

discussion units and the central controller can be either wired or wireless.
The entire discussion system’s audio signal path shall be digital.
5.2 Discussion unit
5.2.1 Required elements
The unit shall contain:

— a microphone with a polar pattern that provides the best intelligibility, taking into account the

speaker's position, and that avoids ambient noises to be picked up;

— a microphone button that provides adequate haptic perception to locate it and haptic feedback to

operate it. The operation of the microphone button should not result in audible artefacts;

— an indicator near the button to show that the microphone is ON. The indicator should be coloured red;

— an indicator near the button to show that the participant is placed in the queue. The indicator should

be coloured green.
The chairperson’s unit shall contain:

— a priority button that provides adequate haptic perception to locate it and haptic feedback to

operate it. Pressing this button can activate a chime and shall temporarily mute or switch OFF all

other microphones.
5.2.2 Additional elements
The unit can, among others, contain:

— an indicator visible for the participants or the audience to show the microphone status. The indicator

shall have the same colour as the microphone button indicator;

— a non-locking socket to connect an individual listening system. The socket shall be compatible with

a TS, TRS and TRRS mini-jack plug of 3,5 mm. In case two participants use the unit, it shall have two

connectors;
© ISO 2019 – All rights reserved 7
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...

NORME ISO
INTERNATIONALE 22259
Première édition
2019-04
Systèmes de conférence —
Équipement — Exigences
Conference systems — Equipment — Requirements
Numéro de référence
ISO 22259:2019(F)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 22259:2019(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2019

Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette

publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,

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Publié en Suisse
ii © ISO 2019 – Tous droits réservés
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ISO 22259:2019(F)
Sommaire Page

Avant-propos ................................................................................................................................................................................................................................v

1 Domaine d'application ................................................................................................................................................................................... 1

2 Références normatives ................................................................................................................................................................................... 1

3 Termes et définitions ....................................................................................................................................................................................... 1

4 Système de conférence complet ............................................................................................................................................................ 5

4.1 Généralités .................................................................................................................................................................................................. 5

4.2 Caractéristiques audio ...................................................................................................................................................................... 5

4.2.1 Temps de latence ............................................................................................................................................................. 5

4.2.2 Niveau de pression acoustique ............................................................................................................................ 6

4.2.3 Entrée et sortie du système. ................................................................................................................................... 6

4.2.4 Réponse en fréquence ................................................................................................................................................. 6

4.2.5 Distorsion ............................................................................................................................................................................... 6

4.2.6 Bruit et ronflement ........................................................................................................................................................ 6

4.2.7 Cohérence du niveau sonore ................................................................................................................................. 7

4.2.8 Interférence .......................................................................................................................................................................... 7

4.3 Confidentialité ......................................................................................................................................................................................... 7

4.4 Marquages et symboles ................................................................................................................................................................... 7

4.5 Accessibilité et facilité d’utilisation ....................................................................................................................................... 7

5 Système de discussion .................................................................................................................................................................................... 7

5.1 Généralités .................................................................................................................................................................................................. 7

5.2 Poste de discussion ............................................................................................................................................................................. 7

5.2.1 Éléments requis ................................................................................................................................................................ 7

5.2.2 Éléments additionnels ................................................................................................................................................ 8

5.2.3 Fonctionnalités facultatives .................................................................................................................................... 8

5.2.4 Autonomie ............................................................................................................................................................................. 8

5.3 Gestion des microphones ............................................................................................................................................................... 8

5.4 Routage des microphones ............................................................................................................................................................. 9

5.5 Traitement des microphones ...................................................................................................................................................... 9

6 Systèmes d'écoute individuels ............................................................................................................................................................... 9

6.1 Généralités .................................................................................................................................................................................................. 9

6.2 Oreillette ....................................................................................................................................................................................................... 9

6.3 Écouteur intra-auriculaire ............................................................................................................................................................ 9

6.4 Écouteurs ..................................................................................................................................................................................................... 9

6.5 Boucle d’induction individuelle .............................................................................................................................................10

7 Système d’amplification sonore.........................................................................................................................................................10

8 Systèmes d'interprétation .......................................................................................................................................................................10

9 Système de distribution de langues ...............................................................................................................................................10

10 Système de métadonnées .........................................................................................................................................................................11

11 Système de vote ...................................................................................................................................................................................................11

12 Système de caméras .......................................................................................................................................................................................11

13 Système d'affichage.........................................................................................................................................................................................11

14 Système d'identification/inscription ...........................................................................................................................................11

15 Système de gestion de conférence ...................................................................................................................................................12

16 Système d'enregistrement/archivage .........................................................................................................................................12

17 Système de webdiffusion...........................................................................................................................................................................12

18 Système de téléconférence ......................................................................................................................................................................12

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ISO 22259:2019(F)

19 Combinaison de salles de conférence et connexions distantes ........................................................................13

20 Salles de conférence divisées ...............................................................................................................................................................13

21 Diagnostic .................................................................................................................................................................................................................13

22 Interopérabilité ..................................................................................................................................................................................................13

Annexe A (informative) Configurations de salles de réunion et de conférence ....................................................14

Annexe B (informative) Modes de routage d’un système de conférence .....................................................................22

Annexe C (informative) Modes de montage de systèmes de conférence ......................................................................26

Annexe D (normative) Gestion des microphones.................................................................................................................................27

Annexe E (informative) Système de caméras ............................................................................................................................................29

Annexe F (informative) Système d'affichage .............................................................................................................................................30

Bibliographie ...........................................................................................................................................................................................................................33

iv © ISO 2019 – Tous droits réservés
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ISO 22259:2019(F)
Avant-propos

L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes

nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est

en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude

a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.

L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents

critères d'approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www

.iso .org/directives).

L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de

droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable

de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant

les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de

l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de

brevets reçues par l'ISO (voir www .iso .org/brevets).

Les appellations commerciales éventuellement mentionnées dans le présent document sont données

pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un

engagement.

Pour une explication de la nature volontaire des normes, la signification des termes et expressions

spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion

de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles

techniques au commerce (OTC), voir le lien suivant: www .iso .org/iso/fr/avant -propos .html

Le comité chargé de l'élaboration du présent document est l'ISO/TC 37, Langue et Terminologie, sous-

comité SC 5, Traduction, interprétation et technologies apparentées.

Tout commentaire ou question sur ce document doit être adressé à l'organisme de normalisation national

de l'utilisateur. Une liste complète de ces organismes peut être trouvée à www .iso .org/members .html.

© ISO 2019 – Tous droits réservés v
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NORME INTERNATIONALE ISO 22259:2019(F)
Systèmes de conférence — Équipement — Exigences
1 Domaine d'application

Ce document spécifie les exigences des systèmes-types de conférence, les parties dont ils sont composés,

les dispositifs auxiliaires nécessaires à leur utilisation (tels que les microphones, les écouteurs, et

l'équipement d’amplification sonore) et l’environnement dans lequel ils sont utilisés. Ces exigences assurent

une interopérabilité et une performance optimale dans des conditions de fonctionnement normal.

Il est applicable aux systèmes filaires et sans fil.

L'environnement et les espaces dans lesquels des événements sont tenus sont décrits à l'Annexe A.

Ce document permet de déterminer la qualité des systèmes de conférence, la comparaison de différents

systèmes et l'évaluation de leur bonne utilisation en listant leurs caractéristiques. Ce document contient

la base technique des normes ISO 20108 et ISO 20109.s
2 Références normatives

Les documents suivants cités dans le texte constituent, pour tout ou partie de leur contenu, des

exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour les

références non datées, la dernière édition du document de référence s'applique (y compris les éventuels

amendements).

ISO 639-3, Codes pour la représentation des noms de langues — Partie 3: Code alpha-3 pour un traitement

exhaustif des langues

ISO 20108, Interprétation simultanée — Qualité et transmission des signaux audio-vidéo — Exigences

ISO 7000, Symboles graphiques utilisables sur le matériel — Symboles enregistrés

IEC 60118-4, Électroacoustique — Appareils de correction auditive — Partie 4: Systèmes de boucles

d’induction utilisées à des fins de correction auditive — Exigences de performances système

IEC 60268-4, Équipements pour systèmes électroacoustiques — Partie 4: Microphones

IEC 60268-7, Équipements pour systèmes électroacoustiques — Partie 7: Casques et écouteurs

IEC 60417, Symboles graphiques utilisables sur le matériel

IEC 61603-7, (seulement en anglais) Transmission de signaux audio et/ou vidéo et de signaux similaires au

moyen du rayonnement infrarouge — Partie 7: Signaux digitaux audio pour des utilisations en conférences

et similaires

IEC 62489-1, Électroacoustique — Systèmes de boucles d’induction audiofréquences pour améliorer

l’audition — Partie 1: Méthodes de mesure et de spécification des performances des composants de systèmes

3 Termes et définitions

Pour les besoins du présent document, les termes et définitions suivants s'appliquent.

L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en

normalisation, consultables aux adresses suivantes:

— ISO Online browsing platform: disponible à l'adresse https: //www .iso .org/obp

© ISO 2019 – Tous droits réservés 1
---------------------- Page: 6 ----------------------
ISO 22259:2019(F)
— IEC Electropedia: disponible à l'adresse http: //www .electropedia .org/
3.1
système

combinaison d'éléments en interaction, organisés pour atteindre un objectif donné

[SOURCE: ISO/IEC 30111:2013, 3.6]
3.2
filaire

utilisant des câbles et des connecteurs pour la transmission de signaux (3.12) et de données

3.3
sans fil
sans câbles ni connecteurs pour la transmission de signaux (3.12) et de données
3.4
système de discussion
système (3.1) qui contrôle les postes de discussion (3.23)
3.5
système d'amplification sonore
système de renforcement sonore
système de sonorisation
système (3.1) qui amplifie le son (3.11)
3.6
système de conférence

système (3.1) qui contrôle les équipements techniques utilisés pour la tenue d'un évènement

3.7
distribution de langues

transmission de l'original (3.9) et du discours interprété (3.32) aux participants (3.25) et à l'audience (3.28)

3.8
système d'interprétation

combinaison d'équipement d'interprétation (3.33) et d'un système (3.1) de distribution de langues (3.7)

Note 1 à l'article: un système d'interprétation peut exiger l'utilisation de cabines d'interprétation conformément

aux normes ISO 2603 ou ISO 4043, équipées de consoles d'interprétation conformément à la norme ISO 20109 ou

d'un système portable d'interprétation conformément à la norme ISO 20109.
3.9
original

sortie audio du système de discussion (3.4) transmettant l'entrée microphone (3.14) et l'entrée

auxiliaire (3.10)
3.10
entrée auxiliaire

entrée audio autre que celle des microphones (3.14) du système de discussion(3.4)

3.11
son
forme d’énergie qui se déplace par ondes de pression
[SOURCE: ISO/TS 16976-7:2013, 3.1.5]
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ISO 22259:2019(F)
3.12
signal
énergie transmise détectable qui est utilisée pour transmettre des informations
[SOURCE: ISO/IEC 14776-153:2015, 3.1.87]
3.13
transducteur
dispositif qui convertit un type d’énergie en un autre
[SOURCE: ISO/TS 19130-2:2014, 4.78]
3.14
microphone
transducteur (3.13) qui convertit un son (3.11) en signal (3.12) électrique

[SOURCE: ISO 20109:2016, 3.3, modifié – le mot "dispositif" est remplacé par "transducteur"]

3.15
haut-parleur

transducteur (3.13) qui convertit un signal (3.12) électrique en son (3.11) suffisamment fort pour être

entendu à une certaine distance
3.16
amplificateur

dispositif électronique qui convertit un petit signal (3.12) en un signal plus grand

[SOURCE: ISO 5577:2017, 5.1.5, modifié – Note 1 à l'article supprimée.]
3.17
écouteur

transducteur (3.13) qui convertit un signal (3.12) électrique en son (3.11), conçu pour être porté à

proximité de l'oreille

[SOURCE: ISO 20109:2016, 3.4, modifié – le mot "dispositif" est remplacé par "transducteur"]

3.18
écouteur intra-auriculaire
écouteur (3.17) conçu pour être inséré dans l'oreille
3.19
oreillette
écouteur (3.17) unique conçu pour être attaché à l'oreille
3.20
boucle d'induction

système (3.1) qui transmet un signal (3.12) sonore directement vers une prothèse auditive

Note 1 à l'article: Le signal sonore est transmis via un champ magnétique, réduisant considérablement le bruit de

fond, les sons concurrents, la réverbération et d'autres distorsions acoustiques afin d'améliorer la clarté du son.

3.21
contrôleur central

équipement qui gère le fonctionnement du système de conférence (3.6) et des systèmes (3.1) et dispositifs

qui y sont reliés
3.22
dispositif de mixage audio

équipement pour combiner, acheminer et modifier le gain, le volume, le timbre et la dynamique de

signaux (3.12) analogiques ou numériques, en les additionnant pour produire un ou plusieurs signaux

de sortie combinés
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ISO 22259:2019(F)
3.23
poste de discussion

dispositif électronique qui permet à un participant (3.25) de prendre la parole lors d’un événement

3.24
cabine de régie

local à partir duquel sont gérés les équipements techniques et la qualité des signaux (3.12) audio et vidéo.

[SOURCE: ISO 2603:2016, 3.3, modifié – le libellé « où les instruments de contrôle sont situés et » est

supprimé et "et la qualité des signaux (3.12) audio et vidéo " ajouté.]
3.25
participant
personne qui joue un rôle actif dans un événement
3.26
président
participant (3.25) qui est en charge du déroulement d’un évènement
3.27
orateur
participant (3.25) qui s'adresse à d'autres

[SOURCE: ISO 18841:2018, 3.1.7, modifié – le mot "personne" est remplacé par "participant"; le libellé

“sous une forme parlée ou signée” est supprimé.]
3.28
audience
ensemble d'auditeurs ou de spectateurs lors d’un événement
3.29
opérateur
personne responsable de la gestion des équipements techniques
3.30
technicien

personne responsable pour la mise à disposition et l'entretien des équipements techniques

3.31
webdiffusion
transmission de données audio et vidéo à travers un réseau à une audience (3.28)
3.32
interpréter

restituer une information parlée ou signée d'une langue source vers une langue cible sous une forme

parlée ou signée, en transmettant à la fois le registre et le sens du contenu en langue source

[SOURCE: ISO 18841:2018, 3.1.1]
3.33
interprétation

restitution d'une information parlée ou signée d'une langue source vers une langue cible sous une forme

parlée ou signée, en transmettant à la fois le registre et le sens du contenu en langue source

[SOURCE: ISO 18841:2018, 3.1.2]
3.34
interprétation simultanée

mode d'interprétation (3.33) pratiqué en même temps que l'orateur (3.27)/le signeur délivre son

discours
[SOURCE: ISO 18841:2018, 3.1.13]
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ISO 22259:2019(F)
4 Système de conférence complet
4.1 Généralités

Un système de conférence est composé des équipements techniques utilisés lors de la tenue d'un

événement. Sa fonction principale et d'amplifier les signaux audio de participants et de sources audio et

de les délivrer aux autres participants.

Un système de conférence doit être au moins composé d'un système de discussion, combiné avec un

système d’écoute et/ou d’amplification sonore.

Un système de conférence doit avoir au moins une sortie de l'original primaire et une entrée auxiliaire

comme décrit dans l'Annexe B.

Un système de conférence peut être étendu avec un système d’interprétation et un système de

distribution des langues.

Un système conférence peut, entre autres, également comporter un ou plusieurs des éléments suivants:

— un système de métadonnées;
— un système de vote;
— un système de caméras;
— un système d’affichage;
— un système d’identification/inscription;
— un système de chevalets électroniques .

Un système de conférence peut, entre autres, être connecté à un ou plusieurs des éléments suivants:

— un système de contrôle de conférence;
— un système d’enregistrement/archivage audio et/ou vidéo;
— un système de webdiffusion;
— un système de téléconférence.

Les signaux audio et vidéo générés par le système de conférence doivent être conformes à la norme

ISO 20108.
Les modes de montage de systèmes de conférence sont décrits dans l'Annexe C.
4.2 Caractéristiques audio
4.2.1 Temps de latence

Le temps de latence total entre l'entrée (microphone ou entrée audio) et la sortie (bas-parleur, écouteurs

ou sortie audio) ne doit pas excéder 20 ms.
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ISO 22259:2019(F)
4.2.2 Niveau de pression acoustique

Tous les niveaux de pression acoustique (dB ) mentionnés dans ce document sont basés sur une

SPL

fréquence sinusoïdale d'1 kHz (sauf autrement spécifié), mesurés dans des conditions de champ libre,

Niveau de pression acoustique Nominal Maximum Unité
à la capsule du microphone 80 110 dB
spl
à une distance de 50 cm du bas-parleur 72 dB
spl
du poste de discussion sans causer
des artéfacts audibles
4.2.3 Entrée et sortie du système.
L'entrée et la sortie nominales du système doivent être de −30dBFS,
4.2.4 Réponse en fréquence

Un système de conférence, y inclus microphone et système d'écoute individuel doit reproduire les

fréquences audio comprises entre 125 Hz et 15 000 Hz avec une variation maximale de ±10 dB,

Un système de conférence, à l’exception du microphone et du système d'écoute individuel, doit reproduire

les fréquences audio dans la bande de fréquences utile avec une variation maximale de ±3 dB.

En plus, un filtre passe-haut doit atténuer les fréquences en-dessous de 125 Hz avec une pente d'au

moins 12 dB par octave afin d'améliorer l'intelligibilité du discours.
Paramètre Min. Typique Max. Unités
Limite basse fréquence 125 Hz
Limite haute fréquence 15 000 Hz
Variation d'amplitude dans la bande utile de fré-
quences, y inclus microphone et système d'écoute ±10 dB
individuel
Variation d'amplitude dans la bande utile de
fréquences, à l’exception du microphone et du ±3 dB
système d’écoute individuel
Fréquence de coupure du filtre passe-haut 125 Hz
Pente du filtre passe-haut 12 dB/Oct

Les microphones doivent être conformes à la norme IEC 60268-4. Les écouteurs doivent être conformes

à la norme IEC 60268-7.
4.2.5 Distorsion
Le système de conférence doit être exempt de distorsion audio perceptible.

La distorsion harmonique totale (DHT) d’un système de conférence, y inclus le microphone, doit être

inférieure à 1% pour un niveau d'entrée jusqu'à 110 dB pour une fréquence d'1 kHz.

spl
4.2.6 Bruit et ronflement
Le système de conférence doit être exempt de bruit et ronflement perceptibles.

Le rapport signal/bruit (SNR) d’un système de conférence, y inclus le microphone, doit être d’au moins

90 dB pour une fréquence d’1 kHz au niveau maximal de pression acoustique.
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ISO 22259:2019(F)
4.2.7 Cohérence du niveau sonore

La variation de volume du système d’écoute individuel ne doit pas dépasser ±3 dB pour chaque langue

d'interprétation distribuée et pour l'original distribué à un niveau d'entrée de 80 dB ±12 dB.

spl
4.2.8 Interférence

Un système de conférence ne doit pas être affecté par une interférence de n’importe quelle source, y

inclus des sources électromagnétiques proches telles que (mais pas limitées à) téléphones portables,

réseaux locaux sans fil et autres systèmes de conférence. Les artéfacts audibles résultant d'une

interférence doivent être plus de 50 dB en-dessous du niveau nominal; le bruit du système ne doit pas

être considéré comme interférence audible.
4.3 Confidentialité

Un système de conférence peut contenir des fonctionnalités qui garantissent la confidentialité de

l'événement, en particulier quand des systèmes sans fil sont utilisés, la conférence est accessible via

webdiffusion ou si le son et/ou l'image sont transmis à travers un réseau local ou global.

4.4 Marquages et symboles

Les marquages et symboles doivent être ceux identifiés dans la base de données sur les symboles

graphiques utilisables sur le matériel qui contient l’ensemble des symboles graphiques inclus dans les

normes IEC 60417 et ISO 7000.

Les marquages ne figurant pas dans cette base de données doivent être clairement mentionnés dans le

manuel d’utilisation.
4.5 Accessibilité et facilité d’utilisation

Il convient que les participants ayant des restrictions physiques et les membres de l'audience soient

en mesure d’utiliser toutes les fonctionnalités du système de conférence sans assistance (voir ISO/

IEC Guide 71 et ISO/TR 22411)
5 Système de discussion
5.1 Généralités

Un système de discussion se compose de postes de discussion souvent reliés en série et connectés à un

contrôleur central qui peut alimenter les postes de discussion. Il peut être géré de manière centralisée

par un opérateur et/ou de façon décentralisée par les participants. En général, le nombre de postes de

discussion est le même que le nombre de participants; toutefois, deux participants peuvent partager un

poste. La connexion entre les postes de discussion et le contrôleur central peut être filaire ou sans fil.

Le circuit complet du signal audio du système de dis
...

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