ETSI ETS 300 294 ed.3 (1997-09)

Television systems; 625-line television Wide Screen Signalling (WSS)

RE/JTC-WSS-1

Televizijski sistemi –Signalizacija (WSS) pri širokozaslonski 625-vrstični televiziji

General Information

• Status: Published
• Publication Date: 17-Sep-1997
• Technical Committee: BROADCAS - EBU/CENELEC/ETSI on Broadcasting
• Current Stage: 12 - Completion
• Due Date: 26-Sep-1997
• Completion Date: 18-Sep-1997
• Ref Project: SIST ETS 300 294 E3:2003 - Television systems; 625-line television Wide Screen Signalling (WSS)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 294 E3:2003
01-december-2003
7HOHYL]LMVNLVLVWHPL±6LJQDOL]DFLMD:66SULãLURNR]DVORQVNLYUVWLþQLWHOHYL]LML
Television systems; 625-line television Wide Screen Signalling (WSS)
Ta slovenski standard je istoveten z: ETS 300 294 Edition 3
ICS:
33.160.25 Televizijski sprejemniki Television receivers
33.170 Televizijska in radijska Television and radio
difuzija broadcasting
SIST ETS 300 294 E3:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 294 E3:2003

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SIST ETS 300 294 E3:2003
EUROPEAN ETS 300 294
TELECOMMUNICATION September 1997
STANDARD Third Edition
Source: EBU/CENELEC/ETSI-JTC Reference: RE/JTC-00WSS-1
ICS: 33.020
Key words: Wide screen, signalling, analogue, TV
Union Européenne de Radio-Télévision
European Broadcasting Union
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: [e-mail]
Tel.: [phone] - Fax: [phone]
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 1997.
© European Broadcasting Union 1997.
All rights reserved.

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ETS 300 294: September 1997
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: September 1997
Contents
Foreword .5
Introduction.5
1 Scope .7
2 Normative reference.7
3 Definition, symbols and abbreviations.7
3.1 Definition.7
3.2 Symbols and abbreviations.7
4 Requirements.8
4.1 Line code .8
4.1.1 Position.8
4.1.2 Clock frequency.8
4.1.3 Pulse shape.9
4.1.4 Signal amplitude.9
4.1.5 Modulation coding .9
4.1.6 Preamble.10
4.1.7 Data bits .10
4.1.8 Odd parity bit .10
4.2 Information content of data bits .12
4.2.1 Data group 1.12
4.2.1.1 Aspect ratio.12
4.2.2 Data group 2, enhanced services.13
4.2.2.1 Film bit .13
4.2.2.2 Colour coding bit.13
4.2.2.3 Helper bit .13
4.2.2.4 Bit b .13
7
4.2.3 Data group 3, subtitles .14
4.2.3.1 Subtitles within Teletext bit .14
4.2.3.2 Subtitling mode.14
4.2.4 Data group 4, others.14
4.2.4.1 Surround sound bit .14
4.2.4.2 Copyright information.15
Annex A (informative): Rules of operation .16
A.1 Receiver display formats.16
A.2 Subtitling.17
A.3 Procedure in absence of signalling .17
Annex B (informative): Recommendations .18
B.1 Low pass pre-filtering .18
B.2 Response time on a change in the received signalling information .18

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ETS 300 294: September 1997
Annex C (informative): Guidelines. 19
C.1 Copyright information. 19
History. 20

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ETS 300 294: September 1997
Foreword
This third edition European Telecommunication Standard (ETS) has been produced by the Joint Technical
Committee (JTC) of the European Broadcasting Union (EBU), Comité Européen de Normalisation
ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI).
NOTE: The EBU/ETSI JTC was established in 1990 to co-ordinate the drafting of standards in
the specific field of broadcasting and related fields. Since 1995 the JTC became a
tripartite body by including in the Memorandum of Understanding also CENELEC,
which is responsible for the standardization of radio and television receivers. The EBU
is a professional association of broadcasting organizations whose work includes the
co-ordination of its members' activities in the technical, legal, programme-making and
programme-exchange domains. The EBU has active members in about 60 countries in
the European broadcasting area; its headquarters is in Geneva *.
* European Broadcasting Union
Code Postal 67
CH-1218 GRAND SACONNEX (Geneva)
Switzerland
Tel: [phone]
Fax: [phone]
Transposition dates
Date of adoption: 5 September 1997
Date of latest announcement of this ETS (doa): 31 December 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 June 1998
Date of withdrawal of any conflicting National Standard (dow): 30 June 1998
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: September 1997
1 Scope
This third edition 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
signalling for EDTV and for surround sound is included. Some bits are reserved 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. Annex B gives recommendations.
Annex C gives a guideline for copyright information.
2 Normative reference
This ETS incorporates by dated and undated reference, provisions from another publication. This
normative reference is cited at the appropriate places in the text and the publication is 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 50 Hz processing".
3 Definition, symbols and abbreviations
3.1 Definition
For the purposes 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 purposes of this ETS, the following symbols and abbreviations apply:
0 falling sync edge
h
a aspect ratio
EDTV Enhanced Definition TeleVision
F clock frequency
s
LSB Least Significant Bit
MSB Most Significant Bit
NRZ Non-Return-to-Zero
PAL Phase Alternation Line (Colour TV-System)
SECAM SequentiellE Couleur Avec Memoire (French Colour-TV System)
T data bit period
d
T sampling period
s
WSS Wide Screen Signalling

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ETS 300 294: September 1997
4 Requirements
4.1 Line code
The following subclauses specify the line code of the Wide Screen Signalling (WSS).
4.1.1 Position
The signalling bits shall be transmitted as a data burst in the first part of line 23.
The position of the beginning of the Wide Screen Signalling bits shall be 11,0 ± 0,25 μs from 0h of the
horizontal sync, as indicated in figure 1. This figure is intended to illustrate the position of the signalling
bits in line 23. For the purpose of commonality between PAL and SECAM, the colour burst and
chrominance sub-carrier are not shown.
Peak white level
500 mV ± 5 %
0
h
Sync.
level
1,5 μs
10,5 μs
11,0 μs 27 ,4 μs (n o te)
±0,25 μs
38,4 μs
42,5 μs
NOTE: For optimum decoder performance, it is recomm
...