DE3314291C1 - Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal - Google Patents

Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal

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Publication number
DE3314291C1
DE3314291C1 DE19833314291 DE3314291A DE3314291C1 DE 3314291 C1 DE3314291 C1 DE 3314291C1 DE 19833314291 DE19833314291 DE 19833314291 DE 3314291 A DE3314291 A DE 3314291A DE 3314291 C1 DE3314291 C1 DE 3314291C1
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Germany
Prior art keywords
color
signals
line
signal
stage
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE19833314291
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German (de)
Inventor
Antoine 7730 Villingen-Schwenningen Pery
Jean-Claude Rufray
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Deutsche Thomson Brandt GmbH
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Deutsche Thomson Brandt GmbH
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Filing date
Publication date
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Priority to DE19833314291 priority Critical patent/DE3314291C1/en
Priority to NL8401286A priority patent/NL192363C/en
Priority to FR8406222A priority patent/FR2544945B1/en
Priority to JP7876284A priority patent/JPS59205891A/en
Application granted granted Critical
Publication of DE3314291C1 publication Critical patent/DE3314291C1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
    • H04N11/165—Decoding means therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/12—Heat utilisation in combustion or incineration of waste

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

A circuit arrangement for setting the amplitude of the colour synchronisation signal in a PAL decoder. The demodulated U and V signals are applied to a phase comparator, the output voltage of which is used for controlling the gain of an amplifier connected in the delayed branch of the decoder. …<IMAGE>…

Description

Das Farbsignal F gelangt über eine Verstärkerstufe 1 an den Ausgang dieser Stufe. Von hier wird das Signal zwei Zweigen zugeleitet. In dem oberen Zweig wird das Signal mit Hilfe der Verzögerungsleitung 2 um die Dau- -5 er einer Zeilenperiode verzögert, in dem unteren Zweig wird es direkt einer Matrix-Schaltung 3 zugeführt.The color signal F passes through an amplifier stage 1 to the output of this stage. From here the signal is fed to two branches. In the upper branch that becomes Signal by means of delay line 2 by the constant -5 it is delayed by one line period; it is fed directly to a matrix circuit 3 in the lower branch.

Der Ausgang der Verzögerungsleitung 2 ist über eine regelbare Verstärkerstufe 4 an die Matrix-Schaltung 3 geschaltet. Die Matrix-Schaltung 3 erzeugt bekanntlich die beiden Farbsignale t/und V, indem einmal die Summe aus unverzögertem und verzögertem und einmal die Differenz aus diesen Signalen gebildet wird. Die beiden Signale i/und Vwerden an eine Phasenvergleichsstufe 5 geschaltet, deren Ausgangsspannung die Verstärkerstufe 4 derart einstellt, bis beide der Vergleichsstufe 5 zugeführten Signale eine Phasenverschiebung von 90° besitzen. Es werden die Farbsynchronsignale verglichen, wozu die Phasenvergleichsstufe über eine Burst-Austaststufe gesteuert wird. Zur Speicherung der Ausgangsspannung dient ein Analogspeicher z. B. in Form eines Kondensators 6.The output of the delay line 2 is connected to the matrix circuit 3 via a controllable amplifier stage 4. As is known, the matrix circuit 3 generates the two color signals t / and V by forming the sum of the undelayed and delayed signals and the difference between these signals. The two signals i / and V are switched to a phase comparison stage 5, the output voltage of which is set by the amplifier stage 4 in such a way that both signals fed to the comparison stage 5 have a phase shift of 90 °. The color sync signals are compared, for which purpose the phase comparison stage is controlled via a burst blanking stage. An analog memory z. B. in the form of a capacitor 6.

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Claims (2)

1 2 den farbträgerfrequenten Farbsignalkomponenten wer- Patentansprüche: den einerseits mit einer Additionsstufe zur Bildung der einen trägerfrequenten Farbsignalkomponente durch1 2 the color subcarrier-frequency color signal components are patent claims: on the one hand with an addition stage for forming the one carrier-frequency color signal component 1. Farbsignaltrennschaltung zur Rückgewinnung Addition der unverzögerten Farbsignale zu den um eine der beiden farbträgerfrequenten Farbsignalkompo- 5 Zeilendauer verzögerten Farbsignale und andererseits nenten aus als mit den Farbsignalkomponenten qua- mit einer Subtraktionsstufe zur Bildung der anderen dratmodulierter Farbträger während des Zeilenhin- trägerfrequenten Farbsignalkomponente durch Sublaufs übertragenen Farbsignalen, wobei während fraktion der unverzögerten Farbsignale von den um eides Zeilenrücklaufs der unmodulierte Farbträger als ne Zeilendauer verzögerten Farbsignale voneinander Farbsynchronsignal übertragen wird und bei der die 10 getrennt. Zum Ausgleich von Verlusten in der Verzöge-Farbsignale und die Farbsynchronsignale über eine rungsleitung ist dieser ein Verstärker nachgeschaltet, Verzögerungsleitung mit einer Verzögerungszeit der einen festen vorgegebenen der Verzögerungsleivon einer Zeilendauer und einem mit dieser Verzö- . tung angepaßten Verstärkungsgrad besitzt, der weder gerungsleitung in Reihe liegenden Verstärker ge- einstellbar noch geregelt wird.1. Color signal separation circuit for recovery addition of the undelayed color signals to the by one the two color subcarrier-frequency color signal composite 5 line duration delayed color signals and on the other hand than with the color signal components with one subtraction stage to form the other data-modulated color subcarrier during the line subcarrier-frequency color signal component through subflow transmitted color signals, whereby during the fraction of the undelayed color signals from the to oath Line return of the unmodulated color carrier as a line duration delayed color signals from each other Color sync signal is transmitted and in which the 10 is separated. To compensate for losses in the delayed color signals and the color sync signals via a transmission line, this is followed by an amplifier, Delay line with a delay time of a fixed predetermined one of the delay levels one line duration and one with this delay. device has adapted gain that neither conduction line in series amplifier is adjustable and still regulated. führt werden und bei der die beiden trägerfrequen- 15 Auch aus der DE-OS 15 37 478 ist eine derartige, die ten Farbsignalkomponenten einerseits mit einer Ad- Verluste der Verzögerungsleitung kompensierende Anditionsstufe zur Bildung der einen trägerfrequenten Ordnung bekannt, bei welcher ein Verstärker mit fest Farbsignalkomponente durch Addition der unverzö- eingestelltem Verstärkungsgrad vorgesehen ist.
gerten Farbsignale zu den der Reihenschaltung aus In der DE-AS 11 85 549 ist eine zuvor beschriebene dem Verstärker und der Verzögerungsleitung ent- 20 Farbsignaltrennschaltung bekannt, bei der vor die Addinehmbaren um eine Zeilendauer verzögerten Färb- tions- bzw. Subtraktionsstufe je eine einstellbare Versignale und andererseits mit einer Subtraktionsstufe . stärkerstufe geschaltet ist. Diese Verstärkerstufen Hezur Bildung der anderen trägerfrequenten Farbsi- , gen jedoch nicht in einer Regelschleife,
gnalkomponente durch Subtraktion der unverzöger- In der DE-AS 27 17 253 wird eine Signaltrennschalten Farbsignale von den der Reihenschaltung aus 25 tung beschrieben, die zur Trennung von frequenzverdem Verstärker und der Verzögerungsleitung ent- kämmten Luminanz- und Chrominanzsignalen dient, nehmbaren um eine Zeilendauer verzögerten Färb- Ein zur Verzögerungsleitung liegender Verstärker kann signale voneinander getrennt werden, dadurch hierbei in Abhängigkeit vom Videoeingangssignal in seigekennzeichnet, daß der Verstärker (4) in sei- nem Verstärkungsgrad verändert werden. Auch hier nem Verstärkungsgrad steuerbar ist, daß eine Pha- 30 sollen Toleranzen der Verzögerungsleitung ausgeglisenvergleichsstufe (5) mit zwei Eingängen und einem chen werden.15 37 478 is also known from DE-OS 15 37 478 such a, the th color signal components on the one hand with an Ad losses of the delay line compensating andition stage to form the one carrier frequency order, in which an amplifier with fixed Color signal component is provided by adding the undelayed gain.
Gerten color signals to those of the series circuit In DE-AS 11 85 549 a previously described 20 color signal separating circuit is known for the amplifier and the delay line, in which the color signal or subtraction stage delayed by one line before the add-in, each one adjustable signal and on the other hand with a subtraction stage. is switched on. These amplifier stages are used to form the other carrier-frequency color signals, but not in a control loop,
Signal component by subtracting the undelayed In DE-AS 27 17 253 a signal separation switching color signals from the series circuit from 25 device is described, which is used to separate the frequency-verdem amplifier and the delay line uncoupled luminance and chrominance signals, acceptable delayed by a line duration An amplifier connected to the delay line can be separated signals from one another, characterized in that, depending on the video input signal, the amplification factor of the amplifier (4) can be changed. Here, too, the degree of gain can be controlled so that a phase tolerance of the delay line should be compensated for comparator stage (5) with two inputs and one. Ausgang zur Entnahme eines von der gegenseitigen Aus der DE-OS 17 62 670 ist eine Farbsignaltrenn-Phasenlage der den beiden Eingängen zugeführten schaltung bekannt, bei der die verzögerten und unver-Signale abhängigen Steuersignals vorgesehen ist, zögerten Farbsynchronsignale während des Zeilenrückdaß der eine Eingang der Phasenvergleichsstufe (5) 35 laufs in einer Phasenvergleichsstufe zur Bildung eines mit dem Ausgang der Additionsstufe (3 + ) und der von der gegenseitigen Phasenverschiebung der Farbandere Eingang der Phasenvergleichsstufe (5) mit Synchronsignale abhängigen Steuersignale miteinander dem Ausgang der Subtraktionsstufe (3 —) verbun- verglichen werden. Mit dem resultierenden Steuersignal den ist, daß die Phasenvergleichsstufe (5) nur wäh- wird ein am Ausgang der Verzögerungsleitung eingerend der Zeiten, in denen die Farbsynchronsignale 40 schalteter Resonanzkreis automatisch abgeglichen, um übertragen werden, wirksam geschaltet ist und daß die durch Temperaturschwankungen sich ändernden mit den der Phasenvergleichsstufe dabei entnehm- Kapazitätsänderungen der Wandler der Verzögerungsbaren Steuersignalen der Verstärkungsgrad des leitung zu kompensieren.Output to remove one of the mutual From DE-OS 17 62 670 is a color signal separation phase position the circuit supplied to the two inputs is known in which the delayed and non-signals Dependent control signal is provided, delayed color sync signals during the line pushing the one input of the phase comparison stage (5) 35 runs in a phase comparison stage to form a with the output of the addition stage (3 +) and that of the mutual phase shift of the color bands Input of the phase comparison stage (5) with synchronous signals dependent control signals with each other the output of the subtraction stage (3 -) are compared. With the resulting control signal the fact is that the phase comparison stage (5) only selects one at the output of the delay line the times in which the color sync signals 40 switched resonance circuit automatically adjusted to are transmitted, is activated and that changes due to temperature fluctuations with the phase comparison stage, changes in capacitance of the converters of the delayable Control signals to compensate for the gain of the line. Verstärkers (4) für die gesamte Zeilendauer derart In der DE-AS 12 88 123 wird durch PhasenvergleichAmplifier (4) for the entire line duration in such a way In DE-AS 12 88 123 is through phase comparison eingestellt wird, daß die den beiden Eingängen der 45 der unverzögerten und verzögerten Signale ein Regelsi-it is set that the two inputs of the 45 of the undelayed and delayed signals are a control Phasenvergleichsstufe (5) während des Zeilenrück- gnal abgenommen, mit welchem die VerzögerungszeitPhase comparison stage (5) removed during the line return, with which the delay time laufs zugeführten Farbsynchronsignale stets um ein der Verzögerungsleitung abgeglichen wird.color sync signals that are continuously fed in are always adjusted by one of the delay line. Viertel ihrer Periode gegeneinander phasenverscho- Der Erfindung liegt die Aufgabe zugrunde, bei einerQuarter of their period out of phase with each other. The invention is based on the object in a ben sind. Farbsignaltrennschaltung nach dem Oberbegriff vonben are. Color signal separation circuit according to the generic term of 2. Farbsignaltrennschaltung nach Anspruch 1, da- 50 Patentanspruch 1 die Amplituden der Farbsynchronsidurch gekennzeichnet, daß am Ausgang der Phasen- gnale automatisch auf gleiche Werte einzustellen, so vergleichsstufe (5) ein die Ausgangsspannung spei- daß die durch Summen- und Differenzbildung daraus cherndes Element (6) geschaltet ist. . abgeleiteten Farbsynchronsignale U und V einen Winkel von 90° einschließen.2. Color signal separation circuit according to claim 1, characterized in that the amplitudes of the color synchro- nization are characterized by that automatically set to the same values at the output of the phase signals, so comparator stage (5) stores the output voltage that the resultant formation of the sum and difference therefrom Element (6) is switched. . derived color sync signals U and V enclose an angle of 90 °. 55 Diese Aufgabe wird mit den im Kennzeichen von55 This task is carried out with the in the identifier of Patentanspruch 1 angegebenen Maßnahmen gelöst.Claim 1 specified measures solved. Eine vorteilhafte Weiterbildung der Erfindung istAn advantageous development of the invention is Die Erfindung geht von einer im Oberbegriff von Pa- dem Patentanspruch 2 zu entnehmen,The invention is based on one in the preamble of patent claim 2, tentanspruch 1 angegebenen Farbsignaltrennschaltung Die Erfindung geht von der Erkenntnis aus, daß zweiTentan claim 1 specified color signal separation circuit The invention is based on the knowledge that two aus. 60 Vektoren in der Amplitude nur dann übereinstimmen,the end. 60 vectors match in amplitude only if Eine derartige Farbsignaltrennschaltung, die zur wenn ihre Summe und ihre Differenz aufeinander senk-Such a color signal separation circuit, which, when their sum and their difference decrease one another, Rückgewinnung der beiden farbträgerfrequenten Färb- recht stehen. Es genügt demnach die PhasendifferenzRecovery of the two color carrier-frequency coloring rights. The phase difference is therefore sufficient Signalkomponenten dient, ist aus der DE-AS 22 31 169 zwischen dem Summensektor und dem DifferenzsektorSignal components is used, is from DE-AS 22 31 169 between the sum sector and the difference sector bekannt. zu messen, um daraus ein Regelsignal für die Einstellungknown. to measure in order to generate a control signal for the setting Die quadraturmodulierten Farbsignale und die Färb- 65 der Amplitude eines Signalweges zu ändern.
Synchronsignale werden bei dieser Farbsignaltrenn- Nachstehend soll die Erfindung mit Hilfe der Zeichschaltung über eine Verzögerungsleitung mit einer Ver- nung erläutert werden, wobei nur das Wesentliche eines zögcrungszeit von einer Zeilendaucr geführt. Die bei- PAL-Decoders zur Erläuterung des Prinzips dargestelltTo change the quadrature modulated color signals and the color 65 of the amplitude of a signal path.
In this color signal separation, the invention will be explained with the aid of the drawing circuit via a delay line with a voltage, whereby only the essentials of a delay time are carried out by a line duration. The at-PAL decoders are shown to explain the principle
DE19833314291 1983-04-20 1983-04-20 Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal Expired DE3314291C1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19833314291 DE3314291C1 (en) 1983-04-20 1983-04-20 Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal
NL8401286A NL192363C (en) 1983-04-20 1984-04-19 Color signal separation circuit for recovering both color signal components carrying the color carrier frequency from color signals.
FR8406222A FR2544945B1 (en) 1983-04-20 1984-04-19 CIRCUIT FOR ADJUSTING THE AMPLITUDE OF COLOR SYNCHRONIZATION SIGNALS
JP7876284A JPS59205891A (en) 1983-04-20 1984-04-20 Amplitude adjusting circuit device of color synchronizing signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833314291 DE3314291C1 (en) 1983-04-20 1983-04-20 Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal

Publications (1)

Publication Number Publication Date
DE3314291C1 true DE3314291C1 (en) 1984-08-16

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Application Number Title Priority Date Filing Date
DE19833314291 Expired DE3314291C1 (en) 1983-04-20 1983-04-20 Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal

Country Status (4)

Country Link
JP (1) JPS59205891A (en)
DE (1) DE3314291C1 (en)
FR (1) FR2544945B1 (en)
NL (1) NL192363C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342181A1 (en) * 1983-11-23 1985-06-05 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen INTEGRATED CIRCUIT FOR THE COLOR DECODER OF A TELEVISION RECEIVER

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185649B (en) * 1963-05-02 1965-01-21 Telefunken Patent Decoder for color television signals
DE1288123B (en) * 1966-01-21 1969-01-30 Telefunken Patentverwertungs Gmbh, 7900 Ulm Control circuit for an ultrasonic delay line for line duration in a color television set
DE1537478A1 (en) * 1967-09-09 1969-10-02 Telefunken Patent PAL color television receiver
DE1762660A1 (en) * 1968-07-31 1971-01-21 Telefunken Patent Control circuit for an ultrasonic delay line in a color television set
DE2231169B2 (en) * 1971-06-25 1974-12-05 Matsushita Electric Industrial Co. Ltd., Kadoma, Osaka (Japan) Circuit arrangement for PAL color television receivers
DE2717253B2 (en) * 1976-04-19 1979-09-06 Rca Corp., New York, N.Y. (V.St.A.) Circuit arrangement for processing a composite color image signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263612A (en) * 1979-08-01 1981-04-21 Rca Corporation Comb filter equalization circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185649B (en) * 1963-05-02 1965-01-21 Telefunken Patent Decoder for color television signals
DE1288123B (en) * 1966-01-21 1969-01-30 Telefunken Patentverwertungs Gmbh, 7900 Ulm Control circuit for an ultrasonic delay line for line duration in a color television set
DE1537478A1 (en) * 1967-09-09 1969-10-02 Telefunken Patent PAL color television receiver
DE1762660A1 (en) * 1968-07-31 1971-01-21 Telefunken Patent Control circuit for an ultrasonic delay line in a color television set
DE2231169B2 (en) * 1971-06-25 1974-12-05 Matsushita Electric Industrial Co. Ltd., Kadoma, Osaka (Japan) Circuit arrangement for PAL color television receivers
DE2717253B2 (en) * 1976-04-19 1979-09-06 Rca Corp., New York, N.Y. (V.St.A.) Circuit arrangement for processing a composite color image signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342181A1 (en) * 1983-11-23 1985-06-05 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen INTEGRATED CIRCUIT FOR THE COLOR DECODER OF A TELEVISION RECEIVER

Also Published As

Publication number Publication date
JPS59205891A (en) 1984-11-21
FR2544945A1 (en) 1984-10-26
JPH0560313B2 (en) 1993-09-02
NL192363C (en) 1997-06-04
FR2544945B1 (en) 1988-04-08
NL192363B (en) 1997-02-03
NL8401286A (en) 1984-11-16

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