SIST EN 50132-5:2001
(Main)Alarm systems - CCTV surveillance systems for use in security applications - Part 5: Video transmission
Alarm systems - CCTV surveillance systems for use in security applications - Part 5: Video transmission
This standard specifies the minimum requirements for the specification and testing of the performance of a video transmission channel involving transmitter, receiver or intermediate devices associated with the selected transmission media, for use in CCTV surveillance systems.
Video transmission equipment may be combined with additional functions, e.g. for audio or data transmission. These functions are not included in this standard.
This standard covers the transmission of colour and black and white video signals in accordance with CCIR Report 624-4, 625 lines, 50 fields per second.
This standard is not applicable for transmission systems which use in the whole system or in parts thereof compressed video signals in any way.
NOTE Compression techniques use methods to match the information content of signals to the best channel capacity. The various test signals of this standard applied on different methods to compress video signals can supply results which meet the requirements of this standard. However, it should not be concluded from such results that those parts of transmission systems using methods to compress video signals are able to transmit a real video signal with a high information content in the correct way.
Methods to compress video signals can use techniques reducing video signals without any loss of information (so called “redundant reduction”) or with some loss of information (so called “irrelevance reduction”).
Alarmanlagen - CCTV Überwachungsanlagen für Sicherungsanwendungen - Teil 5: Videoübertragung
Systèmes d'alarme - Systèmes de surveillance CCTV à usage dans les applications de sécurité - Partie 5: Transmission video
La présente norme stipule les exigences minimales concernant les spécifications et les essais de performance d’une voie de transmission vidéo impliquant un transmetteur, un récepteur et des dispositifs intermédiaires associés au support de transmission choisi, voie destinée à être utilisée dans les systèmes de surveillance CCTV.
Les matériels de transmission vidéo peuvent être combinés avec des fonctions complémentaires, par exemple avec des transmissions audio ou de données. Ces fonctions ne font pas partie de la norme.
La présente norme concerne la transmission des signaux vidéo couleur et noir et blanc, conformément au Rapport 624-4 du CCIR, 625 lignes, 50 trames par seconde.
La présente norme ne s’applique pas aux systèmes de transmission qui utilisent en totalité ou en partie des signaux vidéo compressés de différents types.
NOTE Les techniques de compression utilisent des méthodes pour conserver le contenu informatif des signaux avec la meilleure capacité de transmission. Les différents signaux de test de la présente norme s’appliquant aux différentes méthodes de compression des signaux vidéo peuvent fournir des résultats qui se rapprochent des exigences de la présente norme. Toutefois, il ne faudra pas conclure à partir de ces résultats que ces types de systèmes de transmission utilisant des méthodes de compression de signaux vidéo sont capables de transmettre un réel signal vidéo avec un haut contenu informatif de bonne qualité.
Les méthodes de compression de signaux vidéo peuvent utiliser des techniques réduisant les signaux vidéo sans aucune perte d’information (dites « à compression redondante ») ou avec une petite perte d’information (dites « à compression irrélévante »).
Alarmni sistemi - Nadzorni sistemi CCTV za uporabo v aplikacijah varovanja - 5. del: Video prenos
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50132-5:2001
01-november-2001
Alarmni sistemi - Nadzorni sistemi CCTV za uporabo v aplikacijah varovanja - 5.
del: Video prenos
Alarm systems - CCTV surveillance systems for use in security applications - Part 5:
Video transmission
Alarmanlagen - CCTV Überwachungsanlagen für Sicherungsanwendungen - Teil 5:
Videoübertragung
Systèmes d'alarme - Systèmes de surveillance CCTV à usage dans les applications de
sécurité - Partie 5: Transmission video
Ta slovenski standard je istoveten z: EN 50132-5:2001
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
33.160.40 Video sistemi Video systems
SIST EN 50132-5:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50132-5:2001
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SIST EN 50132-5:2001
EUROPEAN STANDARD EN 50132-5
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2001
ICS 13.310; 33.160.40
English version
Alarm systems -
CCTV surveillance systems for use in security applications
Part 5: Video transmission
Systèmes d'alarme - Alarmanlagen -
Systèmes de surveillance CCTV à usage CCTV Überwachungsanlagen für
dans les applications de sécurité Sicherungsanwendungen
Partie 5: Transmission video Teil 5: Videoübertragung
This European Standard was approved by CENELEC on 1999-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50132-5:2001 E
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EN 50132-5:2001 - 2 -
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 79, Alarm
systems.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved
by CENELEC as EN 50132-5 on 1999-10-01.
The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-02-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2002-10-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A and B are normative.
EN 50132 will consist of the following parts, under the general title “Alarm systems – CCTV
surveillance systems for use in security applications”:
- Part 1 System requirements ;
- Part 2-1 Black and white cameras ;
- Part 2-2 Colour cameras ;
- Part 2-3 Lenses ;
- Part 2-4 Ancillary equipment ;
- Part 3 Local and main control unit ;
- Part 4-1 Black and white monitors ;
- Part 4-2 Colour monitors ;
- Part 4-3 Recording equipment ;
- Part 4-4 Hard copy equipment ;
- Part 4-5 Video motion detection equipment ;
- Part 5 Video transmission ;
- Part 6 (free) ;
- Part 7 Application guidelines.
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CONTENTS
page
Introduction .5
1 Scope .5
2 Normative reference .6
3 Definitions and abbreviations.6
3.1 Definitions .6
3.2 Abbreviations .7
4 Requirements .7
4.1 General .7
4.2 Video input and output .7
4.3 Insertion gain .8
4.4 Bandwidth and frequency response .8
4.5 Signal to noise ratio.8
4.6 Interference .8
4.7 Luminance non-linearity .8
4.8 Chrominance to luminance gain inequality.8
4.9 Chrominance to luminance delay inequality .9
4.10 Differential gain.9
4.11 Differential phase .9
4.12 Environmental conditions .9
4.13 Electro-magnetic radiation .9
4.14 Immunity to electro-magnetic interference.9
4.15 Electrical safety.9
5 Test conditions .9
5.1 Introduction.9
5.2 Test equipment .10
5.3 Laboratory conditions.10
6 Performance tests.10
6.1 Input and output signal levels .10
6.2 Insertion gain .11
6.3 Input and output impedance .11
6.4 DC voltage at the output .13
6.5 Short time waveform distortion .13
6.6 Line time waveform distortion.14
6.7 Field time waveform distortion.14
6.8 Damped low frequency distortion .14
6.9 Chrominance to luminance gain and delay inequality .15
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6.10 Signal to noise ratio.15
6.11 Interference .16
6.12 Luminance non-linearity .16
6.13 Differential gain.17
6.14 Differential phase .17
7 Environmental testing .18
7.1 Introduction.18
7.2 Selection of tests and severity.18
7.3 Dry heat (operational) .19
7.4 Dry heat (endurance) .19
7.5 Cold (operational).20
7.6 Damp heat, steady state (operational).21
7.7 Damp heat, steady state (endurance) .21
7.8 Damp heat, cyclic (operational) .22
7.9 Damp heat, cyclic (endurance) .22
7.10 Water ingress (endurance) .23
7.11 Sulphur dioxide (SO ) (endurance).23
2
7.12 Salt mist, cyclic (endurance) .24
7.13 Shock (operational) .24
7.14 Vibration, sinusoidal (operational).25
7.15 Vibration, sinusoidal (endurance).25
8 Documentation .26
9 Marking and labelling .26
Annex A (normative) Test patterns .27
A.1 Signal A.27
A.2 Signal B.27
A.3 Signal C.28
A.4 Signal D.29
A.5 Signal F .30
Annex B (normative) .31
B.1 Chrominance to luminance amplitude and delay errors.31
B.2 The Rosman nomogram .32
B.3 Damped low frequency distortion .33
B.4 2T waveform mask .34
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Introduction
The purpose of the transmission system in a closed circuit television (CCTV) installation is
to provide reliable transmission of video signals between the various CCTV equipment in
security, safety and monitoring applications.
The complexity of a video transmission system varies in accordance with the requirements
of the installation.
Examples of the different types of video transmission systems covered by this standard are
as follows:
a) Using cable transmission media :
− Coaxial cable,
− Twisted pair cable,
− Fibre optic cable.
b) Using wireless transmission methods :
− Microwave,
− Infra red,
− Radio transmission.
NOTE Multiple video signals may be combined in one physical transmission path using multiplexing techniques.
1 Scope
This standard specifies the minimum requirements for the specification and testing of the
performance of a video transmission channel involving transmitter, receiver or intermediate
devices associated with the selected transmission media, for use in CCTV surveillance
systems.
Video transmission equipment may be combined with additional functions, e.g. for audio or
data transmission. These functions are not included in this standard.
This standard covers the transmission of colour and black and white video signals in
accordance with CCIR Report 624-4, 625 lines, 50 fields per second.
This standard is not applicable for transmission systems which use in the whole system or in
parts thereof compressed video signals in any way.
NOTE Compression techniques use methods to match the information content of signals to the best channel
capacity. The various test signals of this standard applied on different methods to compress video signals can
supply results which meet the requirements of this standard. However, it should not be concluded from such results
that those parts of transmission systems using methods to compress video signals are able to transmit a real video
signal with a high information content in the correct way.
Methods to compress video signals can use techniques reducing video signals without any loss of information (so
called “redundant reduction”) or with some loss of information (so called “irrelevance reduction”).
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2 Normative references
This European standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and
the publications are listed hereafter. For dated references, subsequent amendments to or
revisions of any of these publications apply to this European Standard only when
incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies.
CCIR report 624-4 1990 Characteristics of television systems
CCIR
recommendation
567-3 1990 Transmission performance of television circuits designed for
use
in international connections
EN 50081-1 1992 Electromagnetic compatibility – Generic emission standard –
Part 1: Residential, commercial and light industry
EN 50130-4 1995 Alarm systems - Part 4: Electromagnetic compatibility -
+ A1 1998 Product family standard: Immunity for components of fire,
intruder and social alarm systems
EN 50130-5 1998 Alarm systems - Part 5: Environmental test methods
EN 60065 1998 Audio, video and similar electronic apparatus - Safety
requirements (IEC 60065:1998, mod.)
EN 60068-1 1994 Environmental testing - Part 1: General and guidance
(IEC 60068-1:1988 + corr. Oct.1988 + A1:1992)
EN 60950 2000 Safety of information technology equipment
(IEC 60950:1999 + corr. 2000, mod.)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this standard the following definitions apply:
3.1.1
physical transmission path
combination of the transmission medium and necessary amplifiers and other equipment to
form a transmission path with one or more transmission channels
3.1.2
transmission channel
combination of the transmission medium and necessary amplifiers and other equipment to
form a connection between video equipment in a CCTV system.
3.1.3
transmission system
combination of equipment and media that provide the transmission of video signals between
the various CCTV equipment.
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3.2 Abbreviations
3.2.1 APL: Average picture level
3.2.2 CCIR: Comité Consultatif International des Radiocommunications (International
Radio Consultative Committee).
3.2.3 CCTV: Closed Circuit Television
3.2.4 PAL: Phase Alternate Line
4 Requirements
4.1 General
The properties of the transmission system shall be provided in a specification sheet
covering the items in this clause.
The specifications stated by the manufacturer shall be those determined under the standard
operating conditions, indicating the type and requirements for the transmission media and
such additional information that enable the system designer to achieve the requirements of
this standard.
The common requirements of a video transmission system are given in 4.2 to 4.7. The
additional requirements for the transmission of PAL colour video signals are given in 4.8 to
4.11.
The minimum requirements and specification items are given in 4.2 to 4.15.
4.2 Video input and output
4.2.1 Source and load impedance
The source and load impedance of a transmission system shall be 75 Ω on the unbalanced
coaxial input and output. The impedance tolerance is specified in 4.2.2.
4.2.2 Return loss
The return loss in the inputs and outputs shall be ≥ 20 dB from 0,1 MHz to 5 MHz.
4.2.3 Input and output signal levels
The nominal input and output signal levels shall be 1 V . in accordance with CCIR rep.
pp
624-4 for 625 lines, 50 fields per second and, in case of colour, PAL colour coding. The
transmission equipment shall be capable of operating within specification for a video
component in the composite input and output signals of up to 1,0 V . The signal level of
pp
the synchronization components in the composite video signal shall be (0,3 ± 0,05) V . For
pp
colour signals, the amplitude of the burst component in the composite video signal shall be
(0,3 ± 0,05) V .
pp
4.2.4 Input signal frequency
The equipment shall be capable of operating at an input signal with a horizontal frequency
2
(f ) of 15 625 Hz ± 1 % and a vertical frequency of / x f and a subcarrier frequency of
h 625 h
4,43 MHz ± 50 ppm.
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4.2.5 Input and Output DC voltage
The equipment shall be capable of operating correctly when presented with a video input
signal having a DC component of (0 ± 2) V.
The DC voltage in the terminated output signal shall not exceed (0 ± 2) V.
4.3 Insertion gain
The insertion gain of the transmission system shall be (0 ± 1) dB on the nominal 1 V input
pp
signal.
4.4 Bandwidth and frequency response
4.4.1 General
The bandwidth and frequency response requirements of the video transmission system are
determined by the linear distortion requirements given in 4.4.2 to 4.4.5.
4.4.2 Line time waveform distortion
The waveform distortion on a line time square wave signal shall be ≤ 5 %.
4.4.3 Field time waveform distortion
The waveform distortion on a 50 Hz square wave shall be ≤ 5 %.
4.4.4 Damped low frequency distortion
The peak overshoot of the video signal measured at blanking level shall not exceed 0,25 V.
The peak overshoot shall settle to ≤ 0,02 V within 5 s.
During the test the video and synchronization signals shall not be clipped or compressed by
more than 20 % of their original value.
4.4.5 Short time waveform distortion
The 2T Pulse to bar (K ) ratio shall be ≤ 5 %.
P/B
The 2T K factor (K ) shall be ≤ 5 %.
2T
4.5 Signal to noise ratio
The signal to noise ratio of the transmission channel, which includes the accumulated noise
in cascaded amplifiers and cable loss correction, shall be ≥ 46 dB.
4.6 Interference
Interference from e.g. data channels, other video channels, audio channels, shall not cause
visible disturbance to the picture.
4.7 Luminance non-linearity
The luminance non-linearity shall be ≤ 10 %.
4.8 Chrominance to luminance gain inequality
The gain error shall be ≤ 20 %.
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4.9 Chrominance to luminance delay inequality
The delay error shall be ≤ 100 ns.
4.10 Differential gain
The differential gain error shall be ≤ 10 %.
4.11 Differential phase
The differential phase error shall be ≤ 10°.
4.12 Environmental conditions
The apparatus shall withstand the environmental influences of the specified service
environment.
The service environment is defined by selection of one of the following four classes:
Class I: Indoor but restricted to residential/office environment
Class II: Indoor in general
Class III: Outdoor but sheltered from direct rain and direct sunshine, or indoor with
extreme environmental conditions
Class IV: Outdoor in general.
As a minimum, the equipment shall withstand exposure to the environmental influences of
the tests given in clause 7 for the specified service environment.
4.13 Electro-magnetic radiation
The electro-magnetic radiation of the transmission equipment shall conform to the relevant
standards of the application, as a minimum it shall conform to EN 50081-1.
4.14 Immunity to electro-magnetic interference
The immunity to electro-magnetic interference of the video transmission equipment shall
conform to EN 50130-4.
4.15 Electrical safety
The electrical safety of the video transmission equipment shall conform to the relevant
standards of the application, as a minimum it shall conform to EN 60065 or EN 60950.
5 Test conditions
5.1 Introduction
The test requirements described in this clause have been devised to measure the
performance of CCTV transmission systems in a manner corresponding to their normal
operation. The tests cover the most important transmission properties and enable
comparisons between measurements taken at different laboratories.
To guarantee sufficient accuracy and reproducibility in the measurements, the test shall be
conducted in certain specified conditions.
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5.2 Test equipment
Test equipment shall be calibrated to tolerances in relation with the required accuracy of
the respective measurements.
5.2.1 The test equipment normally required are :
a) A video wave form monitor or oscilloscope, preferably with facilities for triggering
of the sweep from field or line pulses of the CVS signal.
b) Monochrome or colour video monitor.
c) Video noise meter, capable of CCIR weighted noise measurements in accordance
with CCIR rec. 567-3.
d) Video signal generator providing appropriate test signals.
e) A video vectorscope.
NOTE Video analysis equipment combining some of the above mentioned functions may be used.
5.2.2 Test signals
List of signals (also refer to CCIR Rec 567-3, annex 1, part C).
Signal A: half frame white and black bar signal (see Figure A.1).
Signal B: pulse and bar signal (see Figure A.2).
Signal C: frequency burst (see Figure A.3).
Signal D1 and D2: grey scale signal (see Figures A.4 and A.5).
Signal F: 20T pulse (see Figure A.6).
5.2.3 Equipment set-up
The transmission equipment shall be connected and adjusted in accordance with the
manufacturer's recommendations, for the recommended cables and up to their maximum
specified length. Unless otherwise specified in the tests, the system shall operate at nominal
input and output levels and terminated in a standard load impedance of 75 Ω ± 5 %.
5.3 Laboratory conditions
Unless otherwise specified, the atmospheric conditions in the laboratory shall be the
standard atmospheric conditions for measurements and tests, specified in EN 60068-1,
5.3.1, as follows:
Temperature : 15 °C to 35 °C
Relative humidity : 25 % to 75 %
Air pressure : 86 kPa to 106 kPa
6 Performance tests
6.1 Input and output signal levels
6.1.1 Principle
To verify the minimum and maximum signal amplitude at the transmission equipment input
and output terminals.
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6.1.2 Preparation of the test
A tv-signal generator providing grey scale signal D2, Figure A.5, shall be connected to the
terminated equipment input. The amplitude and the blanking reference voltage of the input
and output signals shall be monitored on a dc-coupled waveform monitor.
6.1.3 Test procedure
The composite video test signal applied at the input shall be 1,35 V (luminance part), of
pp
which the amplitude of the synchronization signal shall be (0,3 ± 0,05) V . Superimpose a
pp
positive and negative dc-voltage on the video test signal such that the blanking level of the
test signal reaches + 2 V and - 2 V. Allow some time for the equipment to stabilise to the
new input condition.
6.1.4 Criterion for compliance
The transmission equipment shall be capable of operating over the full test without
noticeable distortion of video signal at the output. Clipping or crushing of the video and
synchronization signals at the equipment output are not allowed.
6.2 Insertion gain
6.2.1 Principle
To verify ratio of the output signal to the input signal of the transmission system.
6.2.2 Preparation of the test
A tv-signal generator providing signal element B3, Figure A.2, shall be connected to the
equipment input. The amplitude and the blanking reference voltage of the input and output
signals shall be monitored on a dc-coupled waveform monitor. The input source impedance
and output termination impedance shall be 75 Ω ± 0,5 %.
6.2.3 Test procedure
Measure the peak to peak voltage of test signal part B3, Figure A.2 at the input and at the
output of the transmission system. The amplitude and timing of the test signal is measured
between the centre point of the bar signal and the blanking level.
6.2.4 Criterion for compliance
The transfer gain of the transmission equipment shall be (0 ± 1) dB after initial adjustment.
6.3 Input and output impedance
6.3.1 Principle
To define the termination impedance at the input and source impedance at the output
terminals of the transmission equipment by the reflection damping.
6.3.2 Preparation of the test
A tv-signal generator providing a grey scale signal shall be connected to the terminated
equipment input. The amplitude and the blanking reference voltage of the input and output
signals shall be monitored on a dc-coupled waveform monitor.
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6.3.3 Test procedure
The input and output impedance and return loss shall be determined by measuring the
return factor, using dedicated reflectometer devices or by using a Wheatstone bridge in
accordance with Figure 1. The signal generator shall be able to provide a frequency sweep
from 0,1 MHz to 5 MHz. The differential capacitor is adjusted to achieve proper high
frequency balancing of the source. R is the reference resistor (75 Ω) with a tolerance of
n
less than 0,5 %, R is input or output impedance of the transmission equipment for
x
measurement of the input and output impedance, respectively. The oscilloscope is used to
measure the unbalance voltage U as a function of the applied input voltage U .
2 1
R
n
R = 75
1 Ω
U
1
Signal
generator
R = 75
i Ω
R = 75
2 Ω
R
x
U
2
Oscillo-
scope
Figure 1
The relation between return factor and input and output impedance is:
R − R
x n
r = (1)
R + R
x n
By measuring the unbalance voltage of the Wheatstone bridge, the relation between the
unbalance voltage and the return factor is defined by equation (2):
U
2
r = 4 (2)
U
1
The return loss is given in equation (3):
1
b = 20 log (dB) (3)
r
r
6.3.4 Criterion for compliance
The input and output impedance for the transmission equipment shall be 75 Ω and the
return loss of ≥ 20 dB in the frequency range between 0,1 MHz and 5 MHz.
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6.4 DC voltage at the output
6.4.1 Principle
To define the dc voltage level of the black part of the video signal in the output of the
transmission equipment.
6.4.2 Preparation of the test
A tv-signal generator providing a grey scale signal shall be connected to the terminated
equipment input. The amplitude and the blanking reference voltage of the input and output
signals shall be monitored on a dc-coupled waveform monitor.
The transmission equipment output shall be terminated in 75 Ω ± 0,5 %.
6.4.3 Test procedure
The dc voltage level in the output shall be determined by measuring the voltage level of the
reference black level in the test signal using a dc coupled waveform monitor.
6.4.4 Criterion for compliance
The dc voltage level of the reference black level in the video signal at the output shall be
(0 ± 2) V.
6.5 Short time waveform distortion
6.5.1 Principle
To verify the waveform distortion with a short pulse signal.
6.5.2 Preparation of the test
Apply a test signal with elements B1 (2T pulse) and B3 (line time bar) as illustrated in
Figure A.2.
6.5.3 Test procedure
Two measurements of distortion are made with the test signals. The first consists of
expressing the amplitude of the pulse as a percentage of the line time bar.
The second consists of expressing the lobes, lagging and leading the pulse as a time
weighted percentage of the rece
...
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