SIST EN ISO 22259:2021

SLOVENSKI STANDARD
oSIST prEN ISO 22259:2020
01-december-2020
Konferenčni sistemi - Oprema - Zahteve (ISO 22259:2019)
Conference systems - Equipment - Requirements (ISO 22259:2019)
Konferenzsysteme - Ausstattung - Anforderungen (ISO 22259:2019)
Systèmes de conférence - Équipement - Exigences (ISO 22259:2019)
Ta slovenski standard je istoveten z: prEN ISO 22259
ICS:
33.160.01 Avdio, video in avdiovizualni Audio, video and audiovisual
sistemi na splošno systems in general
91.040.10 Javne stavbe Public buildings
oSIST prEN ISO 22259:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 22259:2020

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oSIST prEN ISO 22259:2020
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

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oSIST prEN ISO 22259:2020
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
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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

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oSIST prEN ISO 22259:2020
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
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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
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oSIST prEN ISO 22259:2020
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.
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oSIST prEN ISO 22259:2020
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/
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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]
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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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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]
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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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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.
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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 butto
...