Methods of measurement on receivers for television - Part 7: HDTV displays

Deals with the standard conditions and methods of measurement on high definition television (HDTV) displays. Deals with the determination of performance and permits comparision of equipment by listing characteristics useful for specifications and laying down uniform methods of measurement.

Meßverfahren für Empfänger von Fernseh-Rundfunksendungen - Teil 7: HDTV-Wiedergabeeinrichtungen

Méthodes de mesures pour les récepteurs de télévision - Partie 7: Dispositifs de visualisation TVHD

Traite des conditions et méthodes de mesure normalisées applicables aux dispositifs de visualisation haute définition (TVHD). Permet la détermination du niveau de performance d'équipements ainsi que leur comparaison en dressant la liste des caractéristiques représentatives et en proposant des méthodes uniformes de mesure.

Methods of measurement on receivers for television -- Part 7: HDTV displays (IEC 60107-7:1997)

General Information

Status
Published
Publication Date
04-May-1997
Current Stage
6060 - Document made available
Due Date
05-May-1997
Completion Date
05-May-1997

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SLOVENSKI STANDARD
SIST EN 60107-7:1999
01-april-1999
Methods of measurement on receivers for television -- Part 7: HDTV displays (IEC
60107-7:1997)
Methods of measurement on receivers for television -- Part 7: HDTV displays
Meßverfahren für Empfänger von Fernseh-Rundfunksendungen -- Teil 7: HDTV-
Wiedergabeeinrichtungen

Méthodes de mesures pour les récepteurs de télévision -- Partie 7: Dispositifs de

visualisation TVHD
Ta slovenski standard je istoveten z: EN 60107-7:1997
ICS:
33.160.25 Televizijski sprejemniki Television receivers
SIST EN 60107-7:1999 en

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

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SIST EN 60107-7:1999
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SIST EN 60107-7:1999
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SIST EN 60107-7:1999
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SIST EN 60107-7:1999
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SIST EN 60107-7:1999
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SIST EN 60107-7:1999
NORME CEI
INTERNATIONALE
IEC
60107-7
INTERNATIONAL
Première édition
STANDARD
First edition
1997-02
Méthodes de mesures pour les récepteurs
de télévision –
Partie 7:
Dispositifs de visualisation TVHD
Methods of measurement on receivers
for television –
Part 7: HDTV displays
 IEC 1997 Droits de reproduction réservés  Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
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Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 3 –
CONTENTS
Page

FOREWORD ................................................................................................................................... 7

Clause

1 General....................................................................................................................................... 10

1.1 Scope and object............................................................................................................... 10

1.2 Normative references........................................................................................................10

1.3 Definitions.......................................................................................................................... 11

1.4 Types of displays ............................................................................................................... 12

2 General notes on measurements............................................................................................... 12

2.1 General.............................................................................................................................. 12

2.1.1 Operation conditions.............................................................................................. 12

2.1.2 Presentation of results ........................................................................................... 12

2.1.3 Environmental conditions....................................................................................... 14

2.1.4 Precautions during measurement.......................................................................... 14

2.1.5 Power supply.......................................................................................................... 14

2.1.6 Stabilization period................................................................................................. 15

2.1.7 Test room............................................................................................................... 16

2.2 Input signals....................................................................................................................... 16

2.2.1 Video signals.......................................................................................................... 15

2.3 Test signals........................................................................................................................ 16

2.3.1 Video test signals (general remarks) ..................................................................... 16

2.3.2 Audio test signals................................................................................................... 22

2.4 Test instruments................................................................................................................ 23

2.4.1 Video test signal generator .................................................................................... 24

2.4.2 Audio test signal generator .................................................................................... 24

2.4.3 Oscilloscope........................................................................................................... 24

2.4.4 Luminance meter and colorimeter ......................................................................... 24

2.4.5 Other optical measuring instruments..................................................................... 24

2.4.6 Measurement setup............................................................................................... 24

2.5 Standard measuring conditions ......................................................................................... 25

2.5.1 Standard input signal levels ................................................................................... 25

2.5.2 Standard output signal levels................................................................................. 26

2.5.3 Standard display settings....................................................................................... 26

2.5.4 General measurement procedure.......................................................................... 28

3 Tests under general operating conditions .................................................................................. 28

3.1 Electrical and mechanical performance............................................................................. 28

3.1.1 Introduction............................................................................................................ 28

3.1.2 Methods of measurement...................................................................................... 30

3.2 Power consumption...........................................................................................................32

3.2.1 Method of measurement........................................................................................ 32

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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 5 –
Clause Page

4 Characteristics of displayed pictures.......................................................................................... 32

4.1 General properties of the picture ....................................................................................... 32

4.1.1 General.................................................................................................................. 32

4.1.2 Geometrical distortion............................................................................................ 32

4.1.3 Over- and under-scanning and centring ................................................................ 40

4.1.4 Luminance and contrast ........................................................................................ 44

4.1.5 Uniformity of luminance......................................................................................... 48

4.1.6 Uniformity of chromaticity....................................................................................... 49

4.1.7 Convergence and registration errors ..................................................................... 50

4.1.8 White balance........................................................................................................ 52

4.1.9 Resolution.............................................................................................................. 52

4.1.10 Colour fidelity ......................................................................................................... 54

4.1.11 Picture breathing.................................................................................................... 54

4.1.12 Local picture distortion........................................................................................... 56

4.1.13 Sound-to-picture interference ................................................................................ 56

4.1.14 Other characteristics of the picture........................................................................ 58

4.2 Synchronizing quality......................................................................................................... 58

4.2.1 Synchronizing range.............................................................................................. 58

4.2.2 Pulling on whites .................................................................................................... 60

4.2.3 Quality of interlace ................................................................................................. 61

4.3 Characteristics inherent in projection type displays........................................................... 62

4.3.1 General.................................................................................................................. 62

4.3.2 Viewing angle and dependence of luminance uniformity on the angle.................. 63

4.3.3 Dependence of chromaticity on viewing angle....................................................... 65

4.3.4 Screen gain and luminous flux index of a projector............................................... 66

4.4 Characteristics inherent in LCD displays........................................................................... 70

4.4.1 General.................................................................................................................. 70

4.4.2 Viewing angle and dependence of luminance uniformity on the angle.................. 72

4.4.3 Dependence of chromaticity on viewing angle....................................................... 72

4.4.4 Variation of luminance with time ............................................................................ 72

5 Characteristics of video channels............................................................................................... 73

5.1 Characteristics of the luminance channel.......................................................................... 74

5.1.1 General.................................................................................................................. 74

5.1.2 Amplitude response to video frequency................................................................. 74

5.1.3 Linear waveform response .................................................................................... 76

5.1.4 Line time non-linearity............................................................................................ 78

5.1.5 Black level stability................................................................................................. 80

5.2 Characteristics of the colour difference channel................................................................ 82

5.2.1 General.................................................................................................................. 82

5.2.2 Matrix error............................................................................................................. 82

5.2.3 Y/C timing.............................................................................................................. 83

5.2.4 Other characteristics.............................................................................................. 84

Tables.............................................................................................................................................. 85

Figures............................................................................................................................................. 91

Annex A – Bibliography .................................................................................................................. 129

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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_________
METHODS OF MEASUREMENT ON RECEIVERS FOR TELEVISION
BROADCAST TRANSMISSIONS –
Part 7: HDTV displays
FOREWORD

1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.

3) The documents produced have the form of recommendations for international use and are published in the form

of standards, technical reports or guides and they are accepted by the National Committees in that sense.

4) In order to promote international unification, IEC National Committees undertake to apply IEC International

Standards transparently to the maximum extent possible in their national and regional standards. Any

divergence between the IEC Standard and the corresponding national or regional standard shall be clearly

indicated in the latter.

5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with one of its standards.

6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject

of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60107-7 has been prepared by IEC subcommittee 100A: Receiving

equipment, of IEC technical committee 100: Audio, video and multimedia systems and equipment.

The text of this standard is based on the following documents:
FDIS Report on voting
100A/23/FDIS 100A/43/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.
Annex A is for information only.
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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 9 –
METHODS OF MEASUREMENT ON RECEIVERS FOR TELEVISION
BROADCAST TRANSMISSIONS –
Part 7: HDTV displays
1 General
1.1 Scope and object

This part of IEC 107 deals with the standard conditions and methods of measurement on high

definition television (HDTV) displays. Such displays may be used as an integral part of an

HDTV receiver for direct off-air reception, reception via cabled networks, or as a monitor for

pre-recorded video, home movies and games, among other applications.

This standard deals with the determination of performance, and permits the comparison of

equipment by listing the characteristics which are useful for specifications and by laying down

uniform methods of measurement for these characteristics. Performance requirements are not

specified.

This standard does not deal with general safety matters, for which reference should be made

to IEC 65 [1] or other appropriate IEC safety standards.

NOTE – Methods of measurement on wide-screen displays for conventional television signals are dealt with

in IEC 60107-1.
1.2 Normative references

The following normative documents contain provisions which, through reference in this text,

constitute provisions of this part of IEC 107. At the time of publication, the editions indicated

were valid. All normative documents are subject to revision, and parties to agreements based

on this part of IEC 107 are encouraged to investigate the possibility of applying the most recent

editions of the normative documents indicated below. Members of ISO and IEC maintain

registers of currently valid International Standards.
IEC 68: Environmental testing
IEC 68-1: 1988, Environmental testing – Part 1: General and guidance

IEC 60107-1: 1997, Methods of measurement on receivers for television broadcast trans-

missions – Part 1: General considerations – Measurements at radio and video frequencies

IEC 60107-2: 1997, Methods of measurement on receivers for television broadcast trans-

missions – Part 2: Audio channels – General methods and methods for monophonic channels

ITU-R Recommendation BT.471-1: 1994, Nomenclature and description of colour bar signals

________
Figures in square brackets refer to the bibliography given in annex A.
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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 11 –
1.3 Definitions
For the purpose of this part of IEC 107, the following definitions apply:
1.3.1 : Integral part of an HDTV receiver or a monitor for displaying picture
HDTV display

information carried by the HDTV video signals defined in the Recommendation ITU-R BT.709-1

[2] or similar signals with an aspect ratio of 16:9.
It may include audio amplifiers and loudspeakers.
NOTES

1 The ITU-R Recommendation BT.709-1 [2] defines basic parameters of HDTV signals and their signal formats

for 1125/60/2:1 and 1250/50/2:1 systems.

2 Conventional television displays with an aspect ratio of 16:9 are not dealt with by this standard. This type of

display is dealt with by the future IEC/FDIS 107-1.

1.3.2 : In a given direction, the luminous intensity per unit of projected area of any

luminance
surface as viewed for that direction.
The luminance value is expressed in candela per square metre.

1.3.3 : Property of colour stimulus defined by its chromaticity co-ordinates (x,y) of

chromaticity

the CIE 1931 standard colorimetric system [3], or chromaticity co-ordinates (u′,v′) of the CIE 1976

uniform chromaticity system [3].
1.4 Types of displays

HDTV displays in this standard include direct-view types using a cathode ray tube (CRT) and

liquid crystal display (LCD), and projection types using CRTs and LCDs.

It is assumed that the displays are equipped with input terminals for analogue baseband

signals.
2 General notes on measurements
2.1 General

Measurement shall be made in accordance with the following conditions to ensure repeatable

results.

If audio channels and loudspeakers are provided, characteristics of the audio channels shall be

measured by the methods specified in IEC 60107-2.
2.1.1 Operation conditions

Unless specified otherwise in the relevant clauses, both the audio and picture parts shall be in

operation and the scanning circuits shall be properly synchronized. The contrast and

brightness controls should be set at the standard settings specified in 2.5. If different values

are used, they shall be noted with the results.
2.1.2 Presentation of results

Measurement results shall be listed in a table or presented graphically. However, the

relationship between two or more quantities is often more clearly represented in a graph than

as a table.
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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 13 –

When the results of a point-by-point measurement for an individual sample are presented as a

continuous curve in a graph, the measured points shall be clearly indicated. Extrapolated,

theoretical or other information presented, but not based on direct measurement, shall be

clearly distinguished from measured curves, for example by another style of drawing. Linear or

logarithmic scales are recommended for graphical presentation. Linear decibel scales are

equivalent to logarithmic scales.

If deviations from the recommended method are adopted, these shall be clearly stated with the

results. When known, the accuracy of measuring instruments shall also be given.
2.1.3 Environmental conditions

Measurements and mechanical checks may be carried out at any combination of temperature,

humidity and pressure within the following limits:
– ambient temperature: 15 °C to 35 °C, preferably 20 °C;
– relative humidity: 25 % to 75 %;
– air pressure: 86 kPa to 106 kPa.

If the manufacturer finds it necessary to specify climatic conditions differing from the above,

these should be chosen from IEC 68-1 and the measurements shall be made under these

specified conditions.

The conditions mentioned above represent those under which the equipment is required to

meet its specifications. Over a wider range, the equipment may operate but not meet all of its

specifications and it may be permissible to store the equipment under much more extreme

conditions. For more complete discussion of these concepts, reference should be made to IEC 68.

2.1.4 Precautions during measurement

When carrying out measurements, all test conditions or operations which may lead to damage

of the display shall be avoided. This applies particularly to sensitive, solid-state devices and

similar constructions.

If a protective cover is removed and parts that are directly connected to the mains become

accessible, the equipment shall be connected to the a.c. mains via a safety transformer, the

secondary winding of which is insulated in accordance with the principle of double insulation.

It shall be ascertained that the use of a safety transformer does not influence the receiver

properties to be measured. In particular, the internal impedance of the safety transformer shall

be sufficiently low for the behaviour of the display to be the same as when directly connected

to the mains supply.
2.1.5 Power supply

Measurements of the display characteristics shall be carried out at the rated voltage of the power

supply. The fluctuation of the power supply voltage during the tests shall not exceed ±2 %.

When a.c. mains are used, the frequency fluctuation and the harmonic components of the

power supply shall not exceed ± 2 % and 5 % respectively.

To determine the influence of variations in the supply voltages on the display characteristics,

supplementary measurements may be needed at overvoltages and undervoltages, these being

chosen appropriately with due regard to the manufacturer's specifications.
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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 15 –
2.1.6 Stabilization period

In order to ensure that when measurement begins, characteristics do not change significantly

with time, the display shall be operated under standard measuring conditions for a sufficient

period to permit the characteristics to stabilize.
2.1.7 Test room

Measurements shall be carried out in a room that is not subject to disturbing external

interference from electromagnetic fields. If interference may effect the results, the measure-

ments shall be carried out in a screened room.
2.2 Input signals
2.2.1 Video signals
Input video signals to the display shall be YP P component signals
B R
where
Y is the luminance signal;
P is the B-Y signal;
P is the R-Y signal.

The synchronizing signal shall be a composite sync signal consisting of tri-level, bipolar line

synchronizing pulses and field synchronizing pulses.
The Y signal shall be accompanied by the synchronizing signal.

Some displays may require R, G, and B signals instead of the YP P component signals. Such

B R

displays require that the synchronizing signal or line and field driving pulses be separate.

NOTE – Some displays can be operated by negative synchronizing pulses.
2.3 Test signals
2.3.1 Video test signals (general remarks)

Waveforms of test signals and test patterns shown in this clause are examples; however, other

signals with similar characteristics may also be used.

The amplitude of a picture component is measured from the blanking level and expressed as a

percentage to the amplitude of the reference white level. The black level coincides with the

blanking level.

The white reference level can be obtained from the Y signals for composite test patterns,

colour bars and staircase signals, which are defined in this subclause.

NOTE – In order to avoid excessive overshoots of the signal waveform which may occur in the display under

test, high-frequency components of the video signal beyond the nominal frequency bandwidth of the system

should be attenuated by suitable low-pass filters.
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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 17 –
2.3.1.1 Composite test pattern signal

A composite test pattern signal comprises a combination of monochrome and colour signal

components that offer as much information as possible on the performance of the displays.

Such a pattern should include at least the following items:

– circles and equidistant horizontal and vertical lines for linearity and colour convergence

checks;
– a marking to check the visible picture size (see 4.1.3);

– a known brightness scale comprising 5 to 10 brightness steps for gradation checks;

– vertical and horizontal definition wedges in the centre and in the four corners of the

picture area;

– vertical bars of different widths or a wedge and horizontal blocks giving black-white and

white-black transitions for checking overshoot, reflections and low-frequency response;

– areas at the reference white level and black level to check the maximum and minimum

brightness of the picture;
– coloured areas to check decoding operation, colour transitions and luminance/-
chrominance time equalization.

An average picture level (APL) of the pattern signal should be approximately 50 %.

2.3.1.2 Colour bar signal

A colour bar signal consists of vertical bands of colours in order of descending luminance, left

to right, as defined in Recommendation ITU-R BT.471-1. For the measurements of the display,

a 100 % colour bar signal consisting of (100/0/100/0) bars shall be used (for the nomenclature

of bars, refer to ITU-R BT.471-1).
R, G and B primary bar signals are shown in figure 1.

Y, P and P bar signals shall comply with the HDTV standard used. Waveforms of the signals

B R
are shown in figure 2.
2.3.1.3 Black and white cross-hatch pattern signals

The white cross-hatch pattern signal produces a white cross-hatch on a black background and

the black cross-hatch pattern signal produces a black cross-hatch on a white background.

The white cross-hatch pattern is used to measure convergence errors or registration errors of

displays, and the black cross-hatch pattern is used as a scale for locating a point on the screen

and other purposes.

The cross-hatch pattern consists of equidistant horizontal and vertical lines which form

rectangular windows. The screen has 13 and 21 lines, respectively, as shown in figure 3.

These patterns require Y signal only.
2.3.1.4 Full white and full black signals

The full white and full black signals are flat level Y signals whose amplitudes are set at 100 %

and 0 % as shown in figure 4.

These signals are used to measure luminance and other characteristics of a display.

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SIST EN 60107-7:1999
60107-7 © IEC:1997 – 19 –
2.3.1.5 White window signal

The white window signal is a Y signal which produces a white rectangular window on a black

background as shown in figure 5. The width of the window is half the picture height. The signal

amplitude of the window is variable from 10 % to 100 %.
This signal is used to measure luminance of a display.
2.3.1.6 Black and white window signal

The black and white window signal is a Y signal which produces a white rectangular window

and four black rectangular windows on the 50 % grey background as shown in figure 6.

The size of the windows is 2/15th of the picture height.
This signal is used to measure contrast of a display.

NOTE – This signal is adopted by the ITU-R Recommendation BT.815-1 [4]. Detailed parameters of the signal

are described in this Recommendation.
2.3.1.7 Line and window signal

The line and window signal is a Y signal which consists of two vertical white lines placed at the

left and right sides of the picture and a window placed at the centre as shown in figure 7. The

background is set at black level.

This signal is used to measure local picture distortion due to variation of the CRT beam

current.
2.3.1.8 Composite sine-wave signal

The composite sine-wave signal consists of a variable-frequency sine-wave component

superimposed on a 50 % Y level with a peak-to-peak amplitude of 40 % as shown in figure 8.

The frequency of the sine-wave is variable from 100 kHz to 30 MHz.
This signal is mainly use
...

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