EN 62676-4:2015

Video surveillance systems for use in security applications - Part 4: Application guidelines

IEC 62676-4:2014 gives recommendations and requirements for the selection, planning, installation, commissioning, maintaining and testing video surveillance systems (VSS) comprising of image capture device(s), interconnection(s) and image handling device(s), for use in security applications. The objectives of this part of IEC 62676 are to: - provide a framework to assist customers, installers and users in establishing their requirements; - assist specifiers and users in determining the appropriate equipment required for a given application; - provide means of evaluating objectively the performance of the VSS.

Videoüberwachungsanlagen für Sicherungsanwendungen - Teil 4: Anwendungsregeln

Systèmes de vidéosurveillance destinés à être utilisés dans les applications de sécurité - Partie 4: Directives d’application

L'IEC 62676-4:2014 fournit des recommandations et des exigences pour choisir, planifier, installer, mettre en service, entretenir et soumettre à essai des systèmes de vidéosurveillance (VSS) comprenant un(des) dispositif(s) de capture d'images, d'interconnexion et de traitement d'images, destiné(s) à être utilisé(s) dans des applications de sécurité. Les buts visés par la présente partie de l'IEC 62676 sont les suivants: - fournir un cadre pour aider les acheteurs, les installateurs et les utilisateurs à établir leurs exigences de fonctionnement; - aider les rédacteurs de spécifications et les utilisateurs en déterminant le matériel approprié, nécessaire à une application donnée; - fournir un moyen d'évaluer objectivement les performances du VSS.

Video nadzorni sistemi za varnostne aplikacije - 4. del: Smernice za uporabo

General Information

• Status: Published
• Publication Date: 16-Apr-2015
• Withdrawal Date: 12-Apr-2018
• ICS: 13.320 - Alarm and warning systems
• Technical Committee: CLC/TC 79 - Alarm systems
• Drafting Committee: CLC/TC 79 - Alarm systems
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 17-Apr-2015
• Due Date: 22-Aug-2016
• Completion Date: 17-Apr-2015
• Ref Project: SIST EN 62676-4:2015 - Video surveillance systems for use in security applications - Part 4: Application guidelines

Relations

• Replaces: EN 50132-7:2012 - Alarm systems - CCTV surveillance systems for use in security applications - Part 7: Application guidelines
• Effective Date: 17-Sep-2014
• Replaced By: EN IEC 62676-4:2025 - Video surveillance systems for use in security applications - Part 4: Application guidelines
• Effective Date: 28-Feb-2023

Overview

EN 62676-4:2015 (CLC adoption of IEC 62676-4:2014) provides application guidelines for video surveillance systems (VSS) used in security applications. The standard gives recommendations and requirements for the selection, planning, installation, commissioning, maintenance and testing of VSS comprising image capture devices, interconnections and image handling devices. Its objectives are to help customers, specifiers, installers and users define operational requirements, select appropriate equipment, and evaluate VSS performance objectively.

Key topics and technical requirements

• Operational requirements & risk assessment
  • Framework to develop clear objectives, surveillance limitations, periods of operation, resilience and operator workload.
• Site survey and system design
  • Guidance on site plans, camera placement, fields of view, numbers of cameras and coverage planning.
• Camera, lens and housing selection
  • Criteria for selecting fixed, PTZ cameras, lenses and housings based on environment, illumination and target size.
• Image performance and presentation
  • Recommendations covering image resolution, frame rate, compression and display configuration for accurate incident capture and review.
• IP video and transmission
  • Considerations for IP video equipment, interoperability, wired and wireless transmission and IP video performance classes.
• Tamper protection and system integration
  • Guidance on camera tamper detection, system tamper protections and integration with other security systems.
• Storage, export and encryption
  • Requirements for image storage characteristics, export formats, basic metadata (time/date/camera ID) and recommendations for encryption and replay of exported footage.
• Control room configuration
  • Best practices for display sizing, number of images per operator, workstation layout, backup power and environmental protection.
• Testing, commissioning and documentation
  • Developing test plans, user and technical acceptance testing, imaging chain verification and comprehensive documentation for handover and maintenance.

Practical applications

• Designing and specifying CCTV and IP video systems for airports, transport hubs, retail, industrial sites, public spaces and critical infrastructure.
• Preparing tender specifications and procurement requirements for integrators.
• Conducting site surveys, commissioning, and acceptance testing to validate image quality and operational criteria.
• Defining storage, export and cybersecurity practices for forensic-quality evidence.

Who should use this standard

• Security system designers and integrators
• Facility and security managers
• Project specifiers and procurement teams
• System installers, commissioning engineers and auditors
• Law enforcement and compliance officers evaluating VSS performance

Related standards

• IEC/EN 62676 series (Parts 1‑3, IP and transmission standards)
• Supersedes EN 50132‑7:2012
• References include IEC 62305 series and ISO 22311 as harmonized documents

Keywords: video surveillance, VSS, security applications, camera selection, IP video, image quality, system design, risk assessment, test plan, commissioning.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2015
1DGRPHãþD
SIST EN 50132-7:2012
Video nadzorni sistemi za varnostne aplikacije - 4. del: Smernice za uporabo
Video surveillance systems for use in security applications - Part 4: Application
guidelines
Videoüberwachungsanlagen für Sicherungsanwendungen - Teil 4: Anwendungsregeln
Systèmes de vidéosurveillance destinés à être utilisés dans les applications de sécurité -
Partie 4: Directives d’application
Ta slovenski standard je istoveten z: EN 62676-4:2015
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
33.160.40 Video sistemi Video systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62676-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 13.320 Supersedes EN 50132-7:2012
English Version
Video surveillance systems for use in security applications - Part
4: Application guidelines
(IEC 62676-4:2014)
Systèmes de vidéosurveillance destinés à être utilisés dans Videoüberwachungsanlagen für Sicherungsanwendungen -
les applications de sécurité - Partie 4: Directives Teil 4: Anwendungsregeln
d'application (IEC 62676-4:2014)
(IEC 62676-4:2014)
This European Standard was approved by CENELEC on 2015-04-13. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62676-4:2015 E
Foreword
This document (EN 62676-4:2015) consists of the text of IEC 62676-4:2014 prepared by
IEC/TC 79 "Alarm and electronic security systems".

The following dates are fixed:

(dop) 2016-04-13
• latest date by which the document has to be
implemented
at national level by publication of an identical
national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2018-04-13
with the document have to be withdrawn

This document supersedes EN 50132-7:2012.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62676-4:2014 was approved by CENELEC as a European
Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 62305 (series) NOTE Harmonized as EN 62305 (series).
IEC 62305-3 NOTE Harmonized as EN 62305-3.
IEC 62305-4 NOTE Harmonized as EN 62305-4.
ISO 22311:2012 NOTE Harmonized as EN ISO 22311:2014.

- 3 - EN 62676-4:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 62676-1-1 -  Video surveillance systems for use in EN 62676-1-1 -
security applications - Part 1-1: System
requirements - General
IEC 62676-1-2 -  Video surveillance systems for use in EN 62676-1-2 -
security applications -- Part 1-2: Video
transmission - General video transmission
- requirements
IEC 62676-2-1 -  Video surveillance systems for use in EN 62676-2-1 -
security applications -- Part 2-1: Video
transmission protocols - General
requirements
IEC 62676-2-2 -  Video surveillance systems for use in EN 62676-2-2 -
security applications - Part 2-2: Video
transmission protocols - IP interoperability
implementation based on HTTP and REST
services
IEC 62676-2-3 -  Video surveillance systems for use in EN 62676-2-3 -
security applications - Part 2-3: Video
transmission protocols - IP interoperability
implementation based on WEB services
IEC 62676-3 -  Video surveillance systems for use in EN 62676-3 -
security applications -- Part 3: Analog and
digital video interfaces
IEC 62676-4 ®
Edition 1.0 2014-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Video surveillance systems for use in security applications –

Part 4: Application guidelines

Systèmes de vidéosurveillance destinés à être utilisés dans les applications de

sécurité –
Partie 4: Directives d’application

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 13.320 ISBN 978-2-8322-1504-3

– 2 – IEC 62676-4:2014 © IEC 2014
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Abbreviations . 14
4 General considerations . 15
4.1 General considerations . 15
4.2 Risk assessment . 15
4.2.1 General . 15
4.2.2 Selection of security grades . 15
4.3 Developing the operational requirements . 16
4.4 Site survey . 16
4.5 System design including site plan . 17
4.6 Developing the test plan . 17
4.7 Installation, commission and hand over . 17
4.8 Documenting the system . 17
5 Operational requirements specifications . 17
5.1 General . 17
5.2 Purpose of the operational requirements . 17
5.3 Content of the operational requirements . 18
5.3.1 General . 18
5.3.2 Basic objective/functionalities . 18
5.3.3 Definition of surveillance limitations . 18
5.3.4 Definition of the site(s) under surveillance . 18
5.3.5 Definition of activity to be captured . 18
5.3.6 System/picture performance . 18
5.3.7 Period of operation . 18
5.3.8 Conditions at the location . 19
5.3.9 Resilience . 19
5.3.10 Monitoring and image storage . 19
5.3.11 Exporting images . 19
5.3.12 Routine actions . 19
5.3.13 Operational response . 19
5.3.14 Operator workload . 20
5.3.15 Training . 20
5.3.16 Expansions . 20
5.3.17 List of any other special factors not covered by the above . 20
5.4 System operational criteria. 20
5.4.1 General . 20
5.4.2 Automation . 20
5.4.3 Alarm response . 21
5.4.4 System response times . 21
6 Equipment selection and performance . 22
6.1 General . 22

IEC 62676-4:2014 © IEC 2014 – 3 –
6.2 Camera equipment . 22
6.3 Camera and lens selection criteria . 22
6.4 Camera selection . 22
6.4.1 General . 22
6.4.2 PTZ . 23
6.5 Lens and housing selection . 23
6.6 Site coverage/numbers of cameras . 24
6.7 Field of view – object size . 24
6.8 Field of view – Other considerations . 26
6.9 Illumination . 26
6.10 IP Video equipment . 27
6.11 Tamper protection/detection . 28
6.11.1 Camera tamper protection/detection . 28
6.11.2 System tamper protection/detection . 28
6.12 System integration . 28
7 Image presentation . 29
7.1 Display types . 29
7.2 Resolution. 30
8 Transmission . 30
8.1 Principles . 30
8.1.1 General . 30
8.1.2 Selection of IP video performance classes . 31
8.1.3 Interoperability . 31
8.2 Wired transmission links . 32
8.3 Wireless transmission links . 32
8.4 Key considerations for IP based transmission systems. 33
9 Video performance characteristics . 34
9.1 Image compression . 34
9.2 Frame rate . 34
9.3 Resolution. 35
10 Storage characteristics . 35
11 Image storage and export . 37
11.1 Format of the compressed video data . 37
11.2 Encryption. 37
11.3 Basic metadata (time, date, camera identifier) . 37
11.4 Multiplexing format . 38
11.5 Image enhancements . 38
11.6 Image export . 38
11.7 Replay of exported images . 39
12 VSS control room configuration . 39
12.1 Control rooms . 39
12.2 Number, size and positioning of VSS video displays . 40
12.3 Displays and screens mounted on or off the workstation . 40
12.4 Recommended display sizes . 40
12.5 Number of camera images per operator . 40
12.6 Number of work stations . 41
12.7 Equipment siting . 41
12.8 Backup power supply provision . 41

– 4 – IEC 62676-4:2014 © IEC 2014
12.9 Operating temperature . 42
12.10 Lightning and surge protection . 42
13 Defining the test plan . 42
13.1 Purpose of the test plan . 42
13.2 User acceptance testing/inspection . 42
13.3 Technical acceptance testing . 42
13.3.1 Imaging chain consistency . 42
13.3.2 Image quality . 42
14 Summary of the documentation – Pre-installation . 44
14.1 General . 44
14.2 Risk assessment . 45
14.3 Operational requirements . 45
14.4 Design specification . 45
14.5 Site plan . 45
14.6 Test plan . 45
15 System installation and commissioning . 45
15.1 Factory acceptance testing . 45
15.2 Installation process . 46
15.3 User acceptance testing, commissioning and handover . 46
15.4 Declaration of conformance to standards . 46
16 Final documentation . 47
16.1 General . 47
16.2 Complete system drawings . 47
16.3 System commission (with camera specific audits) . 47
16.4 Interface descriptions . 47
16.5 Compliance with legislation (informative) . 47
17 Maintenance . 48
17.1 Maintenance service agreements . 48
17.2 Staff . 48
17.3 Corrective maintenance . 48
17.4 Preventive maintenance . 49
Annex A (informative) Current video standard formats . 51
Annex B (normative) Test protocol for VSS target . 52
B.1 Scope of the test . 52
B.2 Test prerequisites . 52
B.3 Preconditions . 52
B.4 Face selection . 52
B.5 Live view methodology (faces) . 53
B.6 Live view methodology (VRN) . 53
B.7 Recorded view methodology (faces) . 53
B.8 Recorded view methodology (VRN) . 54
B.9 Motion . 54
B.10 Faces: scoring criteria . 54
B.11 VRN: scoring criteria . 54
B.12 Heads control sheet (for example only) . 57
B.13 VRN control sheet (for example only) . 58
Annex C (normative) Test method of image quality – Guidance for the use of the
video test target . 59

IEC 62676-4:2014 © IEC 2014 – 5 –
Annex D (informative) Guide to specifying VSS parameters . 63
Annex E (normative) Detection response testing and acceptability criteria . 65
E.1 General . 65
E.2 False and nuisance alarms . 65
E.3 Setting the response time . 65
E.4 PTZ response time test procedure . 66
E.5 Observer cueing and prompting . 66
E.6 Detection test locations . 66
E.7 Target camouflage . 67
E.8 Tests with moving targets . 67
E.9 Test conditions . 67
E.10 Testing a "live" system . 67
E.11 Detection test results tables . 68
Bibliography . 69

Figure 1 – Recommended minimum sizes for PAL (576i) resolution . 25
Figure B.1 – Heads control sheet . 57
Figure B.2 – VRN control sheet example . 58
Figure C.1 – A3 test target . 59
Figure C.2 – Avoiding optical distortion . 62

Table 1 – Example System feedback – PTZ Control Responding time, performance
and operator . 22
Table 2 – Commonly encountered resolutions (in pixels) . 25
Table 3 – Person screen height equivalent for different digital resolutions (in percent) . 26
Table 4 – Examples of display technologies . 29
Table 5 – Example resolutions . 30
Table 6 – Wireless transmission options . 33
Table 7 – Factors affecting the storage capacity required for a video recorder . 35
Table B.1 – Example auditor log sheet . 55
Table B.2 – Example control room observer log sheet . 55
Table B.3 – Example camera audit sheet . 55
Table B.4 – Blank auditor log sheet . 56
Table B.5 – Blank control room observer log sheet . 56
Table B.6 – Blank camera audit sheet . 56
Table D.1 – Suggested VSS building blocks . 63
Table E.1 – Detection test results . 68

– 6 – IEC 62676-4:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VIDEO SURVEILLANCE SYSTEMS FOR
USE IN SECURITY APPLICATIONS –

Part 4: Application guidelines

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
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6) All users should ensure that they have the latest edition of this publication.
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Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62676-4 has been prepared by IEC technical committee 79: Alarm
and electronic security systems.
This standard is based on EN 50132-7 (2012).
The text of this standard is based on the following documents:
FDIS Report on voting
79/455/FDIS 79/466/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

IEC 62676-4:2014 © IEC 2014 – 7 –
A list of all the parts in the IEC 62676 series, under the general title Video surveillance
systems for use in security applications, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 8 – IEC 62676-4:2014 © IEC 2014
INTRODUCTION
The IEC Technical Committee 79 in charge of alarm and electronic security systems together
with many governmental organisations, test houses and equipment manufacturers has defined
a common framework for video surveillance transmission in order to achieve interoperability
between products.
The IEC 62676 series of standards on video surveillance system is divided into 4 independent
parts:
Part 1: System requirements
Part 2: Video transmission protocols
Part 3: Analog and digital video interfaces
Part 4: Application guidelines
Each part offers its own clauses for the scope, normative references, definitions and
requirements.
The purpose of this part of IEC 62676 is to provide guidance on how to ensure that video
surveillance systems (VSS), thus far referred to as closed circuit television (CCTV), meet their
functional and performance requirements.
This part of IEC 62676 will prove useful to those responsible for establishing operational
requirements, writing specifications, selecting, installing, commissioning, using and
maintaining a VSS.
VSS, in its simplest form, is a means of providing images from security cameras and
recorders for viewing on a display via a transmission system. There is no theoretical limit to
the number of cameras and displays which may be used in a VSS installation but in practice
will be limited by the efficient combination of control and display equipment and the operator's
ability to manage the system.
The successful operation of a VSS requires the active co-operation of the user in carrying out
the recommended procedures.
Due to the wide range of VSS applications, for example security, safety, public safety,
transportation, etc. only the minimum requirements are covered in this part of IEC 62676.

IEC 62676-4:2014 © IEC 2014 – 9 –
VIDEO SURVEILLANCE SYSTEMS FOR
USE IN SECURITY APPLICATIONS –

Part 4: Application guidelines

1 Scope
This part of IEC 62676 gives recommendations and requirements for the selection, planning,
installation, commissioning, maintaining and testing video surveillance systems (VSS)
comprising of image capture device(s), interconnection(s) and image handling device(s), for
use in security applications.
The objectives of this part of IEC 62676 are to:
a) provide a framework to assist customers, installers and users in establishing their
requirements,
b) assist specifiers and users in determining the appropriate equipment required for a given
application,
c) provide means of evaluating objectively the performance of the VSS.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62676-1-1, Video surveillance systems for use in security applications – Part 1-1: System
requirements – General
IEC 62676-1-2, Video surveillance systems for use in security applications – Part 1-2: System
requirements – Peformance requirements for video transmission
IEC 62676-2-1, Video surveillance systems for use in security applications – Part 2-1: Video
transmission protocols – General requirements
IEC 62676-2-2, Video surveillance systems for use in security applications – Part 2-2: Video
transmission protocols – IP interoperability implementation based on HTTP and REST
services
IEC 62676-2-3, Video surveillance systems for use in security applications – Part 2-3: Video
transmission protocols – IP interoperability implementation based on Web services
IEC 62676-3, Video surveillance systems for use in security applications – Part 3: Analog and
digital video interfaces
– 10 – IEC 62676-4:2014 © IEC 2014
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
camera housing
enclosure to provide physical and/or environmental protection of the camera, lens and
ancillary equipment
3.1.2
camera sensitivity
image capturing device capability to produce an image in certain light conditions
3.1.3
VSS surveillance installation
installation consisting of the hardware and software components of a VSS, fully installed and
operational for monitoring a defined security zone
3.1.4
VSS camera
unit containing an imaging device producing a video signal from an optical image
3.1.5
VSS camera equipment
unit containing a VSS camera plus appropriate lens and necessary ancillary equipment
3.1.6
VSS control unit
equipment for controlling and monitoring the required operational functions of the VSS
3.1.7
VSS technician
qualified person who is trained and competent in the installation, maintenance, servicing and
fault-finding of VSSs
3.1.8
VSS
system consisting of camera equipment, monitoring and associated equipment for
transmission and controlling purposes, which may be necessary for the surveillance of a
protected area
3.1.9
corrective maintenance
emergency servicing of a system, or part thereof, carried out in response to the development
of a fault
3.1.10
corrective maintenance report
document that details the requirement for normal or emergency corrective maintenance and
indicates the corrective action taken, as required by IEC 62676-4 or other applicable technical
standards
Note 1 to entry: The report may be an electronic document.

IEC 62676-4:2014 © IEC 2014 – 11 –
3.1.11
company
organization providing design, installation or maintenance of the VSS system
3.1.12
detect
defined functional purpose of a camera to enable the operator to reliably and easily determine
whether or not any target, such as a person, is present.
3.1.13
electronic iris
automatic electronic shutter which changes the camera sensitivity in relation to the varying
light conditions in order to maintain the video output signal within defined limits
3.1.14
electronic shutter
arrangement in the camera changing its sensitivity by electronically controlling its exposure
time
3.1.15
event recording
event controlled recording or storing of image signals for a pre-determined time
Note 1 to entry: refers to video recording not to system log of events.
3.1.16
external synchronisation
method of feeding reference timing signals to all connected devices to ensure that their video
output signals are synchronous
3.1.17
focal length
f
measurement of the converging power of a lens, normally expressed in mm, which can be
used to determine the angle of view for a given sensor size
3.1.18
geo data
digital information assigning a certain spatial location to the earth's surface
3.1.19
identify
defined functional purpose of a camera to enable identifyfication of an individual beyond
reasonable doubt
3.1.20
inspect
defined functional purpose of a camera to enable the operator to obtain information from
objects
Note 1 to entry: An example object may include text or a logo on clothing.
3.1.21
imaging device
device that converts an optical image into an electrical signal
3.1.22
imaging device illumination
level of illumination (luminance) at the photosensitive surface of the imaging device

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3.1.23
iris
variable aperture mechanism which regulates the amount of light passing through the lens
onto the imaging device of the VSS camera
3.1.24
Kell factor
subjective number of lines of resolution that can be visually perceived in a video display
system, expressed as a percentage of the total number of lines of resolution
3.1.25
lens
optical device for projecting an image of a desired scene onto the photo sensitive surface of
the imaging device
3.1.26
monitor
defined functional purpose of a camera to enable viewing of the number, direction and speed
of movement of people across a wide area, providing their presence is known to the operator
3.1.27
NTSC
NTSC resolution
standard-definition video mode referring in digital applications to 486 lines or 720 × 486 pixels
3.1.28
image presentation device
device for converting video signals into pictures on a display screen
3.1.29
observe
defined functional purpose of a camera enabling characteristic details of an individual, such
as distinctive clothing to be seen, whilst allowing a view of activity surrounding an incident
3.1.30
pan and tilt unit
motorised unit permitting the horizontal and vertical positioning of the camera equipment
3.1.31
PAL
PAL resolution
standard-definition video mode referring in digital applications to 576 lines or 720 × 576 pixels
3.1.32
pan, tilt, zoom
PTZ
function of a camera permitting the horizontal, vertical positioning of the camera together with
the angle of view
3.1.33
picture storage
storing of fixed or video images
3.1.34
preventive maintenance
routine servicing of a system, carried out on a scheduled basis

IEC 62676-4:2014 © IEC 2014 – 13 –
3.1.35
preventative maintenance report
document which records the preventive maintenance carried out in accordance with
IEC 62676-4 or other applicable technical standard
Note 1 to entry: The report may be an electronic document.
3.1.36
recognise
defined functional purpose of a camera to enable the operator to obtain recognition of an
individual
3.1.37
risk assessment
systematic process to determine the impact of the consequences of hazards and threats
relative to their probability
Note 1 to entry: The result of the analysis provides the basis for risk evaluation within a risk management
process.
3.1.38
risk management
culture, processes and structures that are directed towards the effective management of
potential opportunities and adverse effects
3.1.39
risk management process
systematic application of management policies, procedures and practices to the tasks of
establishing the context, identifying, analysing, evaluating, treating, monitoring and
communicating risk
3.1.40
scene illumination
level of illumination (luminance) on the area to be kept under surveillance
3.1.41
site plan
pictorial representation of the protected area showing the location and intended views of the
VSS cameras
3.1.42
system design proposal
specification of the system design including location factors, site plan, field of view, detector
range and coverage and control room design
3.1.43
time lapse recording
periodic recording of video images at pre-defined intervals
3.1.44
video signal
video channel being transmitted, streaming or not streaming, analog or digital
3.1.45
video signal amplitude
magnitude of the video signal
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3.1.46
zoom lens
lens with adjustable focal length and therefore an adjustable angle of view
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
ASB anti-social behaviour
BNC Bayonet Neill-Concelman (connector)
CCIR Consultative Committee on International Radio
CCTV closed circuit television
DVR digital video recorder
EMC electro-magnetic compatibility
CRT cathode ray tube
FAT factory acceptance testing
FPS frames per second
Gbps gigabits per second
HD high definition
NVR network video recorder
LCD liquid crystal display
IP internet prot
...