SIST ETS 300 294 E1:2003

SLOVENSKI STANDARD
01-december-2003
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Television systems; 625-line television Wide Screen Signalling (WSS)
Ta slovenski standard je istoveten z: ETS 300 294 Edition 1
ICS:
33.160.25 Televizijski sprejemniki Television receivers
33.170 Televizijska in radijska Television and radio
difuzija broadcasting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 294
TELECOMMUNICATION November 1994
STANDARD
Source: EBU/ETSI JTC Reference: DE/JTC-WSS
ICS: 33.160.20, 33.160.40
Wide Screen Signalling (WSS), analogue television, 16:9 aspect ratio
Key words:
Television Systems;
625-Line television
Wide Screen Signalling (WSS)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1994.
© European Broadcasting Union 1994.
All rights reserved.
New presentation - see History box

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ETS 300 294: November 1994
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to "ETSI
Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 294: November 1994
Contents
Foreword.5
Introduction .5
1 Scope .7
2 Normative references.7
3 Definitions symbols and abbreviations .7
3.1 Definitions .7
3.2 Symbols and abbreviations.7
4 Requirements .7
4.1 Line code.7
4.1.1 Position.8
4.1.2 Clock frequency.8
4.1.3 Signal shape.8
4.1.4 Signal amplitude .8
4.1.5 Modulation coding .9
4.1.6 Preamble .9
4.1.7 Data bits .9
4.1.8 Odd parity bit .9
4.2 Information content of data bits.11
4.2.1 Data group 1.11
4.2.1.1 Aspect ratio.11
4.2.2 Data group 2, enhanced services.12
4.2.2.1 Film bit .12
4.2.2.2 Bit b , b and b .12
5 6 7
4.2.3 Data group 3, subtitles.12
4.2.3.1 Subtitles within teletext bit.12
4.2.3.2 Subtitling mode .13
4.2.4 Data group 4, reserved.13
Annex A (informative): Rules of operation.14
A.1 Receiver display formats .14
A.2 Subtitling.15
A.3 Procedure in absence of signalling.15
Annex B (informative): Recommendations.16
B.1 Low pass pre-filtering .16
B.2 Response time on a change in the received signalling information .16
History.17

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ETS 300 294: November 1994
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ETS 300 294: November 1994
Foreword
This European Telecommunication Standard (ETS) has been produced under the authority of the Joint
Technical Committee (JTC) of the European Broadcasting Union (EBU) and the European Telecommunications
Standards Institute (ETSI), it was prepared by the Taskforce 16:9 of the PALplus group after consulting both the
EBU V/EPS and EBU/V2 groups.
This ETS defines the Wide Screen Signalling (WSS) information for 625 line PAL and SECAM television
systems.
NOTE: The EBU/ETSI JTC was established in 1990 to coordinate the drafting of European
Telecommunication Standards in the specific fields of radio, television and data
broadcasting.
The EBU is a professional association of broadcasting organizations whose work includes
coordination of its Members activities in the technical, legal, programme-making and
programme-exchange domains. The EBU has active members in about 50 Countries in
the European Broadcasting area; its headquarters is in Geneva *.
* European Broadcasting Union
Case Postale 67
CH-1218 GRAND SACONNEX (Geneva)
Switzerland
Tel: +44 22 717 21 11
Fax: +44 22 717 24 81
Transposition dates
Date of latest announcement of this ETS (doa): 28 February 1995
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 August 1995
Date of withdrawal of any conflicting National Standard (dow): 31 August 1995
Introduction
For a smooth introduction of new television services with a 16:9 display aspect ratio in PAL and SECAM
standards, it is necessary to signal the aspect ratio used together with some switching information to the
television receiver. The receiver should be capable of reacting automatically to this information by displaying the
video information in a specified aspect ratio. This signalling is to be considered separately from the type of
system used, but it should allow transmission of system related switching information as well.
This ETS permits the later allocation of additional switching information, related to the introduction of enhanced
television services.
This ETS is applicable for 625 line PAL and SECAM television systems, but there is potential to adopt it to other
standards as well.
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ETS 300 294: November 1994
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ETS 300 294: November 1994
1 Scope
This European Telecommunication Standard (ETS) is applicable to 625 line PAL and SECAM systems in use, in
case, where wide-screen signalling is required by the broadcasters.
It specifies the wide screen signalling information, the coding and the way of incorporating the coded information
into a 625 line system.
The wide screen signalling information contains information on the aspect ratio range of the transmitted signal
and its position, on the position of the subtitles and on the camera/film mode. Furthermore some bits are
reserved for future EDTV signalling (e.g. PALplus) as well as for future use.
This ETS specifies the transmitted signal. Annex A gives the rules of operation for the minimum requirements
for receiver display formats as well as for subtitling.
2 Normative references
This ETS incorporates by dated and 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 ETS only when
incorporated in it by amendment or revision. For undated references the latest edition of the publication referred
to applies.
[1] EBU Recommendation R62 (1990): "Recommendation dominant field for 625-
line 50Hz processing".
3 Definitions symbols and abbreviations
3.1 Definitions
For the purpose of this ETS, the following definition applies:
letterbox operation: Is the use of a picture format with an aspect ratio greater than 1,33, in such a way that
empty (black) lines are added to conform to a 4:3 transmission format.
3.2 Symbols and abbreviations
For the purpose of this ETS, the following s
...