SIST ETS 300 732 E1:2003

• Abstract:

  Specification for the transmission of a Ghosting Cancellation Reference (GCR) signal which may be used by special receivers to remove or reduce ghosting on the received picture. Use of the Line 318 GCR signal as defined in ITU-R BT.1124 for application in Europe.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.160.25 - Television receivers
• ICS: 33.170 - Television and radio broadcasting
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 732 ed.1 (1997-01) - Television systems; Enhanced 625-line PAL/SECAM television; Ghost Cancellation Reference (GCR) signals

SIST ETS 300 732 E1:2003 is a Slovenian standard aligned with ETS 300 732 Edition 1 for Ghost Cancellation Reference (GCR) signals in enhanced 625-line PAL/SECAM television. It specifies the GCR waveform, where the signal is inserted, and how it alternates in transmission so special receivers can reduce ghosting and improve teletext reception. The document is intended for analogue television broadcasting and transmission work on 625-line PAL/SECAM systems.

What does SIST ETS 300 732 E1:2003 specify?

SIST ETS 300 732 E1:2003 applies to 625-line PAL/SECAM systems B, G, H, I, L, D and K on VHF/UHF terrestrial networks, including cable distribution. It specifies reference signals inserted into the baseband video signal before transmission and the method for incorporating them into the television system.

The scope is practical: the signal is meant for receivers with ghost-cancelling functions, where it helps reduce multipath effects on pictures and improve teletext decoding by increasing eye-height.

Annex	What it covers
Annex A	Derivation equations for the GCR waveform
Annex B	GCR generation, transmission, tolerances, and codec transparency
Annex C	Operation of ghost cancellers, including response time and MACP interaction

The main body is organized into scope, normative reference, abbreviations, and the GCR signal requirements. Clause 4 covers waveform, pedestal, location, and transmission sequence.

What are the key requirements of SIST ETS 300 732 E1:2003?

SIST ETS 300 732 E1:2003 centers on how the GCR signal is shaped, timed, and placed in the television line structure. In practice, this is the part a broadcaster or equipment designer has to reproduce accurately so receivers can extract a usable reference.

Waveform and amplitude

Clause 4.1 requires the GCR waveform to be derived using the formula in Annex A, then placed on a pedestal. The signal amplitude at the insertion point is tightly controlled, and the frame-to-frame variation is limited so the reference remains stable enough for ghost cancellation.

Pedestal and timing

Clause 4.1.2 defines the pedestal relative to black level and gives its rise and fall time. Clause 4.2 fixes the insertion point at line 318, while line 317 is reserved so that no time-varying information appears immediately before the reference.

Parameter control

Table 1 in clause 4.2 sets the timing and level parameters for the pedestal and the GCR pulse shape. The document also limits frame-to-frame timing consistency, which matters because timing jitter weakens the receiver’s ability to align and average the received reference.

Alternating polarity and sequence

Clause 4.3 requires alternate-frame inversion of the GCR waveform, creating positive-going line A and negative-going line B. The document allows two transmission sequences. In practice, this gives a defined alternating pattern while staying independent of PAL’s 8-field sequence and SECAM colour reference timing.

Distribution-path tolerance and implementation guidance

Annex B gives guidance on keeping amplitude and timing stable through the distribution path and warns about codec processing. For system integrators, this means the GCR may need careful handling in digital contribution or distribution chains, and in some cases reinsertion after the codec is the practical option.

Receiver operation

Annex C explains how the signal supports ghost cancellers, including cancellation range, response time, and the effect of averaging multiple received GCRs. It also notes the relationship with Motion Adaptive Colour Plus (MACP), which matters when equalization changes are applied in PALplus-related chains.

What terms does SIST ETS 300 732 E1:2003 define?

• GCR (Ghost Cancellation Reference) - The reference signal inserted into the video waveform so a receiver can estimate and cancel ghosting.
• MACP (Motion Adaptive Colour Plus) - A PALplus process that relies on a precise line relationship within a frame.
• PAL (Phased Alternate Line) - The analogue colour television system named in the document’s scope and abbreviations.
• SECAM (Sequentielle Couleur Avec Mémoire) - The analogue colour television system named in the document’s scope and abbreviations.

Who uses SIST ETS 300 732 E1:2003?

SIST ETS 300 732 E1:2003 is used by broadcasters, transmission engineers, receiver manufacturers, and video codec designers working with 625-line PAL/SECAM systems. It is relevant wherever ghosting on analogue terrestrial or cable television signals has to be reduced by signal processing at the receiver.

It also matters to teams designing contribution and distribution chains, because Annex B discusses codec transparency, and to engineers working with teletext, because the reference also helps improve teletext decoding performance.

Which standards are used with SIST ETS 300 732 E1:2003?

• ITU-R Recommendation BT.470 - Provides the television-system reference used in clause 4.2 for line sync and equalizing pulse context.
• ITU-R BT.1124 - Named in the scope as the definition of the Line 318 GCR signal for application in Europe.
• prETS 300 731 - Cited in Annex C as the document describing PALplus and MACP.

What does the SIST ETS 300 732 E1:2003 document contain?

The document contains the waveform derivation in Annex A, including defining equations and parameter values. Clause 4 and Table 1 give the insertion point, timing markers, pedestal level, and amplitude limits for the GCR signal.

It also includes figures for the positive-going and negative-going GCR forms, plus a transmission-sequence table. Annex B adds guidance on generation, tolerances, and digital codec handling, while Annex C explains how ghost cancellers use the reference in practice, including averaging, response time, and MACP considerations.

SLOVENSKI STANDARD
01-december-2003
Televizijski sistemi – Izboljšana televizija PAL/SECAM s 625 vrsticami – Signali
reference za dušenje parazitnih slik (GCR)
Television systems; Enhanced 625-line PAL/SECAM television; Ghost Cancellation
Reference (GCR) signals
Ta slovenski standard je istoveten z: ETS 300 732 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 300 732
TELECOMMUNICATION January 1997
STANDARD
Source: EBU/CENELEC/ETSI JTC Reference: DE/JTC-GCR
ICS: 33.020
Key words: Broadcasting, analogue, TV
Union Européenne de Radio-Télévision
European Broadcasting Union
Television systems;
Enhanced 625-line PAL/SECAM television;
Ghost Cancellation Reference (GCR) signals
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 300 732: January 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 300 732: January 1997
Contents
Foreword .5
1 Scope .7
2 Normative reference.7
3 Abbreviations.7
4 Ghost Cancellation Reference (GCR) signal .7
4.1 GCR waveform .7
4.1.1 GCR amplitude.7
4.1.2 GCR pedestal.7
4.2 Location of the GCR signal.8
4.3 GCR polarity and transmission sequence .9
Annex A (normative): Derivation of the GCR waveform.11
A.1 Defining equations.11
Annex B (informative): GCR generation and transmission .12
B.1 General.12
B.2 Tolerances of the GCR signal .12
B.3 Transparency of digital codecs to the GCR .13
Annex C (informative): Operation of ghost cancellers.14
C.1 Cancellation range and response time.14
C.2 Ghost cancellation and Motion Adaptive Colour Plus (MACP).14
History.15

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ETS 300 732: January 1997
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ETS 300 732: January 1997
Foreword
This 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 ETSs 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
Case Postale 67
CH-1218 GRAND SACONNEX (Geneva)
Switzerland
Tel: [phone]
Fax: [phone]
Transposition dates
Date of adoption 20 December 1996
Date of latest announcement of this ETS (doa): 30 April 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 October 1997
Date of withdrawal of any conflicting National Standard (dow): 31 October 1997

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ETS 300 732: January 1997
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ETS 300 732: January 1997
1 Scope
This European Telecommunication Standard (ETS) is applicable to 625-line PAL/SECAM systems B, G,
H, I, L, D and K broadcast on the VHF / UHF terrestrial networks, including their distribution on cable
networks.
It specifies reference signals that may be inserted into the vertical blanking interval of the baseband video
signal prior to transmission, and the way of incorporating these reference signals into the television
system. These reference signals are intended for use by appropriately equipped television receivers to
reduce or eliminate the effects of multi-path reception on displayed pictures and, in addition, to improve
the eye-height of received teletext data so as to reduce the likelihood of errors in teletext decoding.
This ETS specifies the waveform inserted into the baseband video signal, at the point of insertion.
2 Normative reference
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] ITU-R Recommendation BT.470: "Television Systems".
3 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
GCR Ghost Cancellation Reference
MACP Motion Adaptive Colour Plus
PAL Phased Alternate Line
SECAM Sequentielle Couleur Avec Mémoire (French colour-TV system)
4 Ghost Cancellation Reference (GCR) signal
4.1 GCR waveform
The GCR waveform shall be derived according to the formula given in annex A.
The GCR waveform shall be placed on a pedestal of amplitude V1, as indicated in figure 1, using the
parameters listed in table 1.
4.1.1 GCR amplitude
The maximum peak-to-peak amplitude of the GCR signal at the point of insertion into the television signal
shall be: 700 mV + 0 / - 70 mV.
NOTE: The maximum peak-to-peak amplitude of the GCR signal is reached only at the high
frequency end of its energy spectrum.
The amplitude of the GCR shall have a frame-to-frame consistency within 5 mV peak-to-peak.
4.1.2 GCR pedestal
The pedestal amplitude with respect to black level shall be the mean of the nominal values V2 and V3:
VV23+
()
V1 =  mV.
NOTE: The nominal pedestal amplitude equates to 350 mV.

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ETS 300 732: January 1997
The rise and fall times of the pedestal shall be: 300 ± 100 ns.
The amplitude of the pedestal shall have a frame-to-frame consistency within 5 mV peak-to-peak.
Figure 1: Amplitude and timing of the GCR signal
4.2 Location of the GCR signal
The GCR signal on its pedestal shall be inserted into the television waveform on line 318.
The preceding line, 317, shall contain no time-varying information.
NOTE 1: Line 318 begins with an equalizing pulse
...