DK141980B - CLUTCH TO SYNCHRONIZE A LINE SEQUENCE CHANGE IN A PAL OR SECAM TYPE REMOTE SIGNS - Google Patents

CLUTCH TO SYNCHRONIZE A LINE SEQUENCE CHANGE IN A PAL OR SECAM TYPE REMOTE SIGNS Download PDF

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Publication number
DK141980B
DK141980B DK259566A DK259566A DK141980B DK 141980 B DK141980 B DK 141980B DK 259566 A DK259566 A DK 259566A DK 259566 A DK259566 A DK 259566A DK 141980 B DK141980 B DK 141980B
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DK
Denmark
Prior art keywords
line
phase
pal
clutch
synchronize
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Application number
DK259566A
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Danish (da)
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DK141980C (en
Inventor
W Bruch
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Telefunken Patent
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Priority to DK532472A priority Critical patent/DK140917B/en
Publication of DK141980B publication Critical patent/DK141980B/en
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Publication of DK141980C publication Critical patent/DK141980C/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/44Colour synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/44Colour synchronisation
    • H04N9/465Synchronisation of the PAL-switch
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/44Colour synchronisation
    • H04N9/47Colour synchronisation for sequential signals

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

Description

I MUIn MU

νδ «ο fremixmelsemmift 1 it 19 8 0 DANMARK m lnta·’ H °* * 9/« «(21) Aneagntng nr. 2595/66 (22) fndfeveret cfen 20. BlSj 19^6 (23) Lsbedag 20. ffiSj ig66 (44) Anwgriingen frembgt os fiwnlujiwl««—hrlftat oflwtSgufrxi dan 28. Jul* 19°0 DIREKTORATET FOR _ _ _____ PATENT-OG VAREMÆRKEVÆSENET (**> Priofiwt t*gmm fra dmνδ «ο forexmixemift 1 it 19 8 0 DENMARK m lnta · 'H ° * * 9 /« «(21) Application No 2595/66 (22) was issued cf 20. BlSj 19 ^ 6 (23) Reading 20. 20. (44) The application was made to us «« - Mrlftat oflwtSgufrxi dan 28 Jul * 19 ° 0 DIRECTORATE OF THE _ PATENT AND TRADEMARKET SYSTEM (**> Priofiwt t * gmm from dm

21. maj 1965# T 28655, IEMay 21, 1965 # T 28655, IE

12. Jug. 1965* T 28779, IE12. Jug. 1965 * T 28779, IE

(70TELEPDNKEN PATENl^ERMEBTQKGSGKSFJ.JU^CIHiJPT «LB.H., Ulm/Dcmsu, Ellea* ’Bethenstraase 5* BE.(70TELEPDNKEN PATENl ^ ERMEBTQKGSGKSFJ.JU ^ CIHiJPT «LB.H., Ulm / Dcmsu, Ellea * 'Bethenstraase 5 * BE.

(7¾ Opfinderi Walter Bruch* Haamcnrer* Meneching Str. 13* IE.(7¾ Inventor Walter Bruch * Maintenance * Meneching Str. 13 * IE.

(74) FuldrnwaXB under Rsgww bahandUng(74) Full rnwaXB under Rsgww bahandUng

Internationalt Patent-Bureau.__ (54) Kobling til synkronisering af en liniesekventiel onækiftning I en farvefjernsyns modtager af PAL·- eller SECAJi-typen.International Patent Bureau .__ (54) Coupling for synchronizing a line sequential inequality In a color television receiver of the PAL · or SECAJi type.

Opfindelsen angår en kobling til synkronisering af en liniesekventiel omskiftning i en farvef jerns ynsmodtager af PAL- eller SECAM-typen, hvor der af et fra limie til linie alternerende farvesynkroniseringssignal afledes en alternerende impulsfølge, som over et frekvensselektivt led tilføres onkoblingsspandingsge-neratoren til synkronisering af omskiftningsfasen.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a coupling for synchronizing a line-sequential switch in a PAL or SECAM type iron color receiver, in which an alternating pulse sequence is derived from a glued-to-line alternating color signal which is applied to a decoupling voltage sync over a frequency selective link. the changeover.

I PAL-farvefjernsynsmodtagere kræves der som bekendt en liniefrekvent omskifter, som fra linie til linie omstyrer fasen af en lokalt frembragt reference-bærebølge eller af et farvebærebølgefrekvent signal. Denne omskifters frekvens kan synkroniseres ved hjælp af det modtagne signals 1 ini es ynkrcmis er ings impuls er eller ved hjælp af linietilbageløbelmpulseme fra modtagerens linieafbøjningskobling.As is well known in PAL color television receivers, a line frequency switch is required, which from line to line reverses the phase of a locally generated reference carrier or of a color carrier frequency signal. The frequency of this switch can be synchronized by the incremental pulse of the received signal 1 or by the line feedback pulses from the receiver's line deflection coupling.

Desuden skal imidlertid også den rigtige omstyringsfase for den liniefrekvente omskifter være sikret, hvilket vil sige, at omskifteren eksempelvis under linien 2 141980 1 indtager stillingen 1 og under linien 2 indtager stillingen 2 og ikke omvendt.In addition, however, the correct switching phase for the line-frequency switch must also be ensured, which means that the switch, for example, under line 2 141980 1 occupies position 1 and below line 2 occupies position 2 and not vice versa.

Med henblik på i modtageren at sikre den rigtige omstyringsfase for omskifteren er det kendt, jvf. Telefunken-Zeitung 1964, hæfte 2, side 112-115, ved hver linies begyndelse at overføre to farvesynkroniseringssignaler, hvoraf det første har en fase, der er ens fra linie til linie, medens det andet har en fase, der omstyres 180° fra linie til linie. Det første farvesynkroniseringssignal tjener i modtageren til synkronisering af den lokale referencebærebølge, og det andet farvesynkroniseringssignal tjener til styring af omstyringsfasen for den liniefrekvente omskifter. De to farvesynkroniseringssignaler overføres samtidigt med en faseforskydning på 90°, og de udgør tilsammen et kombineret farvesynkroniseringssignal med en fase, der ændres 90° fra linie til linie, hvilket i det følgende omtales som et alternerende farves ynkronis erings s igna1.In order to ensure in the receiver the correct switching phase for the switch, it is known, cf. Telefunken-Zeitung 1964, booklet 2, pages 112-115, at the beginning of each line to transmit two color synchronization signals, the first of which has a phase which is the same from line to line, while the other has a phase that is 180 ° from line to line. The first color synchronization signal serves in the receiver for synchronizing the local reference carrier, and the second color synchronization signal serves to control the redirect phase of the line frequency switch. The two color synchronization signals are transmitted simultaneously with a phase shift of 90 ° and together they constitute a combined color synchronization signal with a phase which changes 90 ° from line to line, which is hereinafter referred to as an alternating color synchronization signal.

Til udnyttelse af det alternerende farvesynkroniseringssignal til de to nævnte opgaver i modtageren er det kendt, jvf. fransk patentskrift nr. 1.383.118, at tilføre det alternerende farvesynkroniseringssignal og den lokalt frembragte referencebærebølge til en fasediskriminator, hvis udgangsspænding over et lavpasfilter med en i forhold til linievarigheden stor tidskonstant tjener til synkronisering af referencebærebølgeoscillatoren og desuden direkte tjener til styring af omstyringsfasen for omskifteren eller af en omkoblingsspændingsgenerator, som frembringer en omstyringsspænding til omskifteren.To utilize the alternating color synchronization signal for the two aforementioned tasks in the receiver, it is known, cf. French Patent Specification No. 1,383,118, to supply the alternating color synchronization signal and the locally generated reference carrier wave to a phase discriminator whose output voltage over a low voltage ratio over a low voltage for the line duration, a large time constant serves to synchronize the reference carrier oscillator and, moreover, directly serves to control the switching phase of the switch or of a switching voltage generator which produces a switching voltage to the switch.

Da fasediskriminatorens udgangsspænding når direkte frem til omkoblingsspændingsgeneratoren, kan støjimpulser på fasediskriminatorens udgang forfalske omkob-lingsspændingsgeneratorens omstyringsfase, hvorved der opstår farvetoneforfalskninger i det gengivne billede.Since the output discriminator's output voltage reaches directly to the switching voltage generator, noise impulses at the output of the phase discriminator can falsify the switching phase of the switching voltage generator, thereby producing color tone falsifications in the rendered image.

Til grund for opfindelsen ligger den opgave at udforme en kobling af den indledningsvis angivne art således, at indvirkningen på omkoblingsspændingsgeneratoren hidrørende fra støjsignaler i det alternerende farvesynkroniseringssignal nedsættes .The object of the invention lies in the design of a coupling of the type indicated in the introduction so that the effect on the switching voltage generator resulting from noise signals in the alternating color synchronization signal is reduced.

Koblingen ifølge opfindelsen er ejendommelig ved, at det frekvensselektive led er en på den halve liniefrekvens afstemt svingningskreds med en så stor godhed, at den halve liniefrekvens * oversvingninger ligger uden for svingningskredsens resonanskurve, og at den herved over svingningskredsen optrædende sinusformede spænding med den halve liniefrekvens anvendes til synkroniseringen af omskiftningsfasen.The coupling according to the invention is characterized in that the frequency-selective link is a vibration circuit tuned to the half-line frequency with such goodness that the half-line frequency * oscillations lie outside the resonant curve of the vibration circuit, and that the sinusoidal line frequency of the oscillating circuit with the vibration circuit is used for the synchronization of the switching phase.

En sådan svingningskreds udgør en svinghjulskobling, og den formindsker koblingens s tøjpåvirkelighed betydeligt, fordi den kun kan svinge på en enkelt frekvens. Der opnås således en stabilisering af omskiftningsfasen, således at forstyrrelser af farvefjernsynsbilledet undgås eller i hvert fald reduceres kraftigt. Svingningskredsen kan være bestanddel af en på den halve liniefrekvens svingende og ved hjælp af fasediskriminatorens udgangsspænding synkroniseret oscillator.Such a pivotal circuit constitutes a flywheel clutch, and it significantly reduces the clutch's impact on the clutch because it can only swing at a single frequency. Thus, a stabilization of the switching phase is achieved so that distortions of the color television image are avoided or at least greatly reduced. The oscillation circuit may be a component of a oscillator synchronized oscillator swinging on the half-line frequency and using the phase discriminator output voltage.

3 1419803 141980

Opfindelsen skal i det følgende forklares nænaere under henvisning til tegningen, hvor fig. 1 viser et principdiagraæ over en kobling ifølge opfindelsen, fig. 2 kurver til forklaring af den i fig. 1 viste kobling, og fig. 3 et praktisk udførelseseksempel ifølge opfindelsen.The invention will now be explained in more detail with reference to the drawing, in which: 1 shows a principle diagram of a coupling according to the invention; FIG. 2 curves for explaining the embodiment of FIG. 1, and FIG. 3 is a practical embodiment of the invention.

1 figurerne er til hinanden svarende dele forsynet med ens henvisningsbetegne ls er.In the figures, similar parts are provided with like reference numerals ls.

1 fig. 1 når farvesynkroniserIngasignalet fra klemmen 1 med fra linie til linie omstyret fase fren til en fasediskriminator 5. Faeediskrinitiatoren 5 leverer dels en styrespænding til en referencebærebølgeosci1lator 8, dels en impulscyklos 18,19 til et sinusintegrationsled 21. Referenceberebølgeoeci11atoren 8fs udgangs pending tilføres fasediskriainatore» 5 som sammenligningsstørrelse. Sinusintegrations leddet 21 indeholder en kobling til fraftitrering af grundevi ligningen 23 fra den alternerende inp«lacyklus 18,19. Til opnåelse af denne grundsvingning er et større antal alternerende impulser nødvendigt. Enkelte støjimpulser bidrager således kun lidt til dannelsen af sirnmspsedlngwi 23, som ammen med liniesynkroniseringsimpulseme 3, der tilføres over en klemme 4, tjener til styring af en som omkoblingsspændingsgenerator tjenende nnltivibrætor 15. Til indstilling af den gunstigste fasebeliggenbed af styringen er der tilknyttet sinusintegrations leddet 21 eller linieimpulsstrækningen et ikke vist fasedrejuingsled. Multivibratoren 15 er forbundet med en omskifter 12, hvis omskifterkontakter er forbundet med referencebærebølgeoecillatoren 8 direkte og over et fasedrejningsled 11, således at der på udgangs klemmen 13 skiftevis står en referencebærebølge med en fase på 0° og 180° til rådighed. Til bedre anskueliggørelse er i fig. 2 de i den i fig. 1 viste kobling optrædende svingninger opført ovenover hinanden.1 FIG. 1, when the color synchronize input signal from terminal 1 with line-to-line switched phase from a phase discriminator 5. comparison size. The sinus integral link 21 contains a coupling for subtracting the fundamental equation 23 from the alternating input cycle 18,19. To achieve this fundamental oscillation, a greater number of alternating pulses are needed. Thus, a single noise pulse contributes little to the formation of the siren pulse 23, which the breast with the line synchronizing pulses 3 supplied over a terminal 4 serves to control a switchboard 15 serving as a switching voltage generator. or the line pulse stretch of a phase rotation link not shown. The multivibrator 15 is connected to a switch 12, whose switch contacts are connected to the reference carrier oscillator 8 directly and above a phase rotary joint 11, so that a reference carrier with a phase of 0 ° and 180 ° is alternately provided. For better illustration, FIG. 2 are those in the embodiment of FIG. 1, oscillations appearing above each other.

Fig. 3 viser detaljeret en gennemprøvet kobling af den i fig. 1 viste art.FIG. 3 shows in detail a tested coupling of the device shown in FIG. 1 art.

Fasediskriminatoren 5 leverer dels en reguleringsspænding til efterregulering af farvebærebølgeoscillatoren 8, sen f.eks. indeholder et reaktenstrin, dels en cyklus af alternerende impulser 18,19. De alternerende impulser 18,19 tilføres en forstærker 24, i hvis udgangskreds der er indkoblet en på den halve liniefrekvens afstemt svingningskreds 25 med s& stor godhed, at kun grundsvingningen, dvs. en sinusspænding 23 med den halve liniefrekvens, opstår over denne kreds. På denne måde fungerer svingningskredsen 25 som integrationsled 21, der ikke leder forstyrrelser videre. Ved forstærkeren 24’s tilslutning til fasediskriminatoren 5 kan det være fordelagtigt mellem disse koblingsdele at indkoble en impedansansætter 26.The phase discriminator 5 supplies, in part, a control voltage for post-regulation of the color carrier oscillator 8, e.g. contains a reaction step, partly a cycle of alternating pulses 18.19. The alternating pulses 18,19 are supplied to an amplifier 24 in whose output circuit a vibration circuit 25 tuned to the half-line frequency is connected with such goodness that only the fundamental oscillation, ie. a sine voltage 23 of half the line frequency occurs over this circuit. In this way, the oscillation circuit 25 acts as an integral link 21, which does not direct interference. By connecting the amplifier 24 to the phase discriminator 5, it may be advantageous to connect an impedance connector 26 between these coupling parts.

Den i fig. 3 viste svingningskreds 25 er modtaktkoblet med bensyn til den omkoblingsspændingsgenerator, som skal styres. De den sota multivibrator udformede omkoblingsspændingsgenerator 15 tilførte sinusspændinger 23 er derfor fasefor- 141980 4 skudt 180° i forhold til hinanden. Beliggenheden af de multivibratoren 15 ligeledes tilførte liniesynkroniseringsimpulser 3 i forhold til toppene af sinusspændingen 23 kan påvirke virkemåden af multivibratoren 15. Til indstilling af den optimale driftsbetingelse kan det derfor være fordelagtigt at tilknytte koblingen et fasedrejnings led til gensidig forskydning af disse to spændinger 3 og 23.The FIG. 3, the oscillation circuit 25 shown is reciprocally coupled with fuel to the switching voltage generator to be controlled. Therefore, the sinus voltages 23 applied to the so-called multivibrator supply voltage generator 15 are phase-shifted 180 ° relative to each other. The location of the multivibrator 15 also supplied with line synchronization pulses 3 relative to the peaks of the sine voltage 23 may affect the mode of operation of the multivibrator 15. Therefore, to adjust the optimum operating condition, it may be advantageous to connect the coupling a phase rotary link to these two voltages 3 and .

Den sinusformede spænding 23 findes kun over svingningskredsen 25, hvis fasediskriminatoren 5 får tilført omstyrede farvesynkroniseringssignaler 16 og 17. Ifølge en videre udvikling af opfindelsen udvindes der ved ensretning af den sinusformede spænding en jævnspænding, som ved modtagelse af sort-hvide signaler blokerer farvekanalen eller ved modtagelse af NTSC-signaler omkobler modtageren tilsvarende, eller omvendt ved modtagelse af farvesignaler åbner farvekanalen eller omstyrer denne ved modtagelse af omstyrede farvesynkroniseringssignaler.The sinusoidal voltage 23 is found only over the oscillation circuit 25 if the phase discriminator 5 is supplied with redirected color synchronization signals 16 and 17. According to a further development of the invention, a direct voltage is obtained by rectifying the sinusoidal voltage which, when receiving black and white signals, blocks color channel. receiving NTSC signals similarly switches the receiver, or vice versa, upon receiving color signals, opens the color channel or redirects it upon receiving redirected color synchronization signals.

DK259566A 1965-05-21 1966-05-20 CLUTCH TO SYNCHRONIZE A LINE EQUIVAL CHANGE IN A PAL OR SECAM TYPE REMOTE SIGNS DK141980C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK532472A DK140917B (en) 1965-05-21 1972-10-26 Coupling to generate a switching voltage for the color channel in a PAL color television receiver.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DET28635A DE1240919B (en) 1965-05-21 1965-05-21 Circuit arrangement for synchronizing a line-frequency switch in a color television receiver
DET0028635 1965-05-21
DET0028779 1965-06-12
DET0028779 1965-06-12

Publications (2)

Publication Number Publication Date
DK141980B true DK141980B (en) 1980-07-28
DK141980C DK141980C (en) 1980-12-08

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Application Number Title Priority Date Filing Date
DK259566A DK141980C (en) 1965-05-21 1966-05-20 CLUTCH TO SYNCHRONIZE A LINE EQUIVAL CHANGE IN A PAL OR SECAM TYPE REMOTE SIGNS

Country Status (11)

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AT (1) AT256203B (en)
BE (1) BE681329A (en)
DE (2) DE1240919B (en)
DK (1) DK141980C (en)
ES (1) ES326159A1 (en)
FI (2) FI41289B (en)
FR (1) FR1526835A (en)
GB (1) GB1138911A (en)
NL (1) NL157180C (en)
NZ (1) NZ145104A (en)
SE (1) SE345364B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ153808A (en) * 1967-07-19
NL6801381A (en) * 1968-01-31 1969-08-04
FR2064256A1 (en) * 1969-06-02 1971-07-23 Centre Electronique Fse
FR2055713B1 (en) * 1969-08-01 1973-02-02 Centre Electronique Fse
FR2069944B1 (en) * 1969-12-12 1973-11-16 Centre Electronique Fse
DE2943271C2 (en) * 1979-10-26 1986-03-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Multi-standard color television receiver circuitry
JPS5765087A (en) * 1980-10-07 1982-04-20 Mitsubishi Electric Corp Color television receiver
FI122745B (en) 2010-11-23 2012-06-15 Aikawa Fiber Technologies Oy A method for making a screen cylinder and a screen cylinder

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Publication number Publication date
ES326159A1 (en) 1967-03-01
DE1248708B (en) 1967-08-31
NL6607057A (en) 1966-11-22
BE681329A (en) 1966-10-31
SE345364B (en) 1972-05-23
DK141980C (en) 1980-12-08
FI41567B (en) 1969-09-01
GB1138911A (en) 1969-01-01
FI41289A (en) 1968-07-01
DE1240919B (en) 1967-05-24
AT256203B (en) 1967-08-10
FR1526835A (en) 1968-05-31
NZ145104A (en)
FI41289B (en) 1969-06-30
NL157180C (en) 1978-06-15

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