IEC 61603-6:2001

Transmission of audio and/or video and related signals using infra-red radiation - Part 6: Video and audio-visual signals

Specifies general requirements and methods of measurement for equipment using infrared radiation as a carrier of information.

General Information

• Status: Published
• Publication Date: 09-Oct-2001
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.040.40 - Data communication networks
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Current Stage: PPUB - Publication issued
• Start Date: 30-Nov-2001
• Completion Date: 10-Oct-2001

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61603-6
First edition
2001-10
Transmission of audio and/or video and
related signals using infra-red radiation –
Part 6:
Video and audio-visual signals
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/catlg-e.htm) enables
you to search by a variety of criteria including text searches, technical
committees and date of publication. On-line information is also available on
recently issued publications, withdrawn and replaced publications, as well as
corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/JP.htm) is also
available by email. Please contact the Customer Service Centre (see below) for
further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: [e-mail]
Tel: [phone]
Fax: [phone]
INTERNATIONAL IEC
STANDARD
61603-6
First edition
2001-10
Transmission of audio and/or video and
related signals using infra-red radiation –
Part 6:
Video and audio-visual signals
 IEC 2001  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
P
International Electrotechnical Commission
For price, see current catalogue

– 2 – 61603-6  IEC:2001(E)
CONTENTS
FOREWORD . 3
1 Scope . 4
2 Normative references. 4
3 Definitions. 4
4 Abbreviations. 4
5 Explanation of terms . 5
6 System considerations . 5
7 General conditions for measurements . 6
8 Characteristics to be specified and their methods of measurement . 6
9 Interface values, performance requirements and recommendations . 8
10 Marking and contents of specifications. 10
Figure 1 – Transmission chain. 10
Figure 2 – Location for measuring . 11
Figure 3 – Transmitting distance . 11
Figure 4 – Angle of maximum divergence at half optical radiant intensity. 11
Figure 5 − Radiant intensity of transmitter or radiator . 11
Figure 6 − Irradiance of receiver. 12
Figure 7 – Characteristics of the transmitter . 12
Figure 8 – Directivity characteristics of the transmitter . 12
Figure 9 – Characteristics of the receiver . 13
Figure 10 – Directivity characteristics of the receiver. 13
Figure 11 – Measuring system for spurious emission. 14
Figure 12 – Transmission format (composite video signal). 16
Figure 13 – Transmission format (Y/C separation video signal) . 15
Figure 14 – Pre-emphasis circuit (example). 15
Table 1 – Marking and contents of specifications. 10

61603-6  IEC:2001(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TRANSMISSION OF AUDIO AND/OR VIDEO AND RELATED SIGNALS
USING INFRA-RED RADIATION –
Part 6: Video and audio-visual signals
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 specifications, 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 61603-6 has been prepared by Technical area 3: Infrared systems,
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
100/295/FDIS 100/421/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 3.
The committee has decided that the contents of this publication will remain unchanged until
2003. At this date, the publication will be
reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
– 4 – 61603-6  IEC:2001(E)
TRANSMISSION OF AUDIO AND/OR VIDEO AND RELATED SIGNALS
USING INFRA-RED RADIATION –
Part 6: Video and audio-visual signals
1 Scope
IEC 61603-1 specifies general requirements and methods of measurement for equipment
using infrared radiation as a carrier of information.
This part of IEC 61603 specifies requirements and methods of measurement for analogue
video transmission systems which are not covered by IEC 61603-1, nor by other standards. It
allows systems which make different economic use of the available bandwidth to be described
in order for conclusions regarding interference and compatibility to be drawn.
NOTE For details of audio transmission systems, see IEC 61603-2.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61603. For dated references, subsequent amend-
ments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this part of IEC 61603 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 61603-1, Transmission of audio and/or video and related signals using infra-red radiation
– Part 1: General
IEC 61603-2, Transmission of audio and/or video and related signals using infra-red radiation
– Part 2: Transmission systems for audio wide band and related signals
IEC 61938, Audio, video and audiovisual systems – Interconnections and matching values –
Preferred matching values of analogue signals
3 Definitions
For the purposes of this part of IEC 61603, the definitions given in Part 1 apply.
4 Abbreviations
IR infrared (see IEC 61603-1)
IRED infrared emitting diode (see IEC 61603-1)
PD photo diode
O/E optical/electrical
Tx transmitter/radiator
Rx receiver
ND filter neutral density filter

61603-6  IEC:2001(E) – 5 –
5 Explanation of terms
5.1 Combined transmitter and radiator
A combined transmitter and radiator (illustrated as element A-B in figure 1) does not have an
electrical output.
5.2 Receiver
As well as the general characteristics given in IEC 61603-1, other characteristics may need to
be specified if a receiver (illustrated as element B-C in figure 1) is combined with other
functions, such as a television set.
5.3 Ancillary equipment
Ancillary equipment, such as power supplies or battery chargers, may be required for the
operation of a system. The manufacturer shall specify all the necessary data for correct
operation and maintenance.
5.4 Transmission of video signals
The transmission format of composite video signals and Y/C video signals are specified in this
part of IEC 61603.
5.5 Safety aspects
Safety aspects are considered in IEC 61603-1.
6 System considerations
6.1 Area of application
This part of IEC 61603 describes a single-channel infrared video transmission system in one
direction, mainly used for viewing a video programme from a VCR, video camera, or video
disc player.
NOTE 1 In consumer applications, video signals may be available in composite video signals or in Y/C component
video signals.
NOTE 2 A channel for video signals is defined in IEC 61603-1.
NOTE 3 Audio signal transmission systems are specified in IEC 61603-2.
NOTE 4 Transmission systems for high-speed data and remote control are under consideration.
6.2 Environmental conditions for operation
The environmental conditions for the equipment are mainly defined in relevant standards for
individual units. Unless otherwise specified, the equipment shall at least be capable of
operating within the following temperature and relative humidity ranges:
5 °C to 40 °C, and 25 % RH to 75 % RH
Systems and apparatus in accordance with this part of IEC 61603 are primarily used indoors,
with the advantage of operating more than one interference-free system in adjacent rooms.
6.3 Partition of functions between elements of the systems
Due to the different applications for different room sizes, equipment is designed in various
combinations of functional blocks. It is desirable to have only a few blocks of small size and
low installation cost for home application.

– 6 – 61603-6  IEC:2001(E)
7 General conditions for measurements
7.1 Test conditions
Temperature: 15 °C to 35 °C
Humidity: 45 % RH to 75 % RH
Brightness: 500 lx to 1 000 lx (on the surface of the receiver)
Normal (i.e. not operating at high frequency) fluorescent lamps shall be used.
7.2 Location
A sufficiently large room should be used for the test, so that the reflection of infrared radiation
from the walls, floor and ceiling is negligible.
NOTE The location illustrated in figure 2 may be used if a correction due to reflection is made.
An absorbing optical filter (neutral density or ND filter) is applied to the transmitter or the
receiver. The following precautions are essential:
a) take into account the correlation between the absorption of the filter and the transmitting
distance;
b) when measuring directivity, adjust the filter to the direction of the transmitter;
c) maintain the brightness at the receiver within the 500 lx to 1 000 lx range.
8 Characteristics to be specified and their methods of measurement
8.1 Transmitting distance and directivity
8.1.1 Transmitting distance
Calculate the transmitting distance (as illustrated in figure 3) using the following equation:
I
d =
E
where
d is the transmitt
...