DE2720696C2 - Method for the transmission of color carriers and synchronization pulses to several externally synchronized color television cameras - Google Patents
Method for the transmission of color carriers and synchronization pulses to several externally synchronized color television camerasInfo
- Publication number
- DE2720696C2 DE2720696C2 DE2720696A DE2720696A DE2720696C2 DE 2720696 C2 DE2720696 C2 DE 2720696C2 DE 2720696 A DE2720696 A DE 2720696A DE 2720696 A DE2720696 A DE 2720696A DE 2720696 C2 DE2720696 C2 DE 2720696C2
- Authority
- DE
- Germany
- Prior art keywords
- color
- pulses
- serving
- signals
- color carrier
- Prior art date
- 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
Links
- 238000000034 method Methods 0.000 title claims description 12
- 239000000969 carrier Substances 0.000 title claims description 4
- 230000001360 synchronised effect Effects 0.000 title claims 3
- 230000005540 biological transmission Effects 0.000 title claims 2
- 239000003990 capacitor Substances 0.000 claims 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
- H04N9/475—Colour synchronisation for mutually locking different synchronisation sources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
- Color Television Image Signal Generators (AREA)
Description
)ie Erfindung bezieht sich aiii ein Verfahren /ur ertragung von Farbträger und Synchronisierimpuli zu mehreren extern /u synchronisierenden l'arbnsehkameras ii.i-.-l-. CCIR-PAL-Norm entsprechend dem Oberbegriff des Anspruchs 1.) The invention relates aiii a method / ur Transfer of color carriers and synchronization impulses to several externally / u synchronizing computer cameras ii.i -.- l-. CCIR-PAL standard according to the preamble of claim 1.
Beim Betrieb mehrerer Fernsehkameras besteht häufig auch der Wunsch, die verschiedenen FBAS-Signale miteinander zu mischen. Für einen einwandfreien Mischvorgang ist es dabei unerläßlich, die Farbfernsehkameras synchron zu betreiben. Dies bedeutet, daß die Übereinstimmung der Phasenlage aller FBAS-Sigr.ale in bezug auf Horizontal- und Vertikalfrequenz wie auch auf Farbträger und PAL-Schahspannung gegeben sein muß.When operating several television cameras, there is often a need to use the various composite signals to mix with each other. For a perfect mixing process it is essential to have the color television cameras operate synchronously. This means that the phase position of all FBAS Sigr.ale in be given with respect to horizontal and vertical frequency as well as color carrier and PAL-Shah voltage got to.
Zu diesem Zweck werden in üblicher Weise Horizontal- und Vertikalimpuls H bzw. V, Synchronsignal 5, Austastsignal A, PAL-Kennimpulse P sowie Burst-Kennimpuls K übertragen. Für jedes dieser Signale ist an sich eine getrennte Leitung erforderlich.For this purpose, horizontal and vertical pulses H and V, synchronizing signal 5, blanking signal A, PAL identification pulses P and burst identification pulse K are transmitted in the usual way. A separate line is required for each of these signals.
Aus den DE-AS 15 37 104 und 18 11417 sind Verfahren bekannt, alle erforderlichen Kamera-Steuersignale zu einem Kombinationssignal zu vereinigen. Die Rückgewinnung der einzelnen Signale erfordert hierbei jedoch teilweise einen erheblichen Schaltungsaufwand, der insbesondere bei Kompakl-Fernsehkameras nicht zu vertreten ist.From DE-AS 15 37 104 and 18 11417 methods are known to combine all necessary camera control signals into a combination signal. The recovery of the individual signals in this case, however, sometimes requires a considerable amount of circuitry, which is not justifiable in particular in the case of compact television cameras.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der im Oberbegriff des Anspruchs 1 genannten An zu schaffen, bei der die Rückgewinnung der einzelnen Signale nur einen geringen Schaltungsaufwand erfordert.The invention is based on the object of providing a method as specified in the preamble of claim 1 To create in which the recovery of the individual signals only requires a small amount of circuitry requires.
Die Lösung dieser Aufgabe erfolgt eifindungsgemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Maßnahmen.This object is achieved according to the invention by those specified in the characterizing part of claim 1 Measures.
Aus den verwendeten drei Einzelsignalen lassen sich mit geringem Aufwand alle zur Kamerasteucrung erforderlichen Signale ableiten.From the three individual signals used, all of them can be used for camera control with little effort derive the necessary signals.
Weiterbildungen des Gegenstandes des Anspruchs 1 ergeben sich aus den Unteransprüchen.Further developments of the subject matter of claim 1 result from the subclaims.
Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnungsfiguren beispielsweise erläutert. Es zeigtThe invention is explained below with reference to the drawing figures, for example. It shows
Fig. 1 ein Impulsdiagramm des erfindungsgemäßen Synchron isiersigna Is.Fig. 1 is a timing diagram of the synchronizing isiersigna Is according to the invention.
Fig. 2 eine Schallungsanordnung zur Erzeugung des Synchronisiersignal gemäß Fi g. 1 undFig. 2 shows a sound arrangement for generating the Synchronization signal according to Fi g. 1 and
Fig. 3 ^ine Schaltungsanordnung zur Rückgewinnung der einzelnen Signale einschließlich Farbträger aus dem Synchronisiersignal gemäß Fig. 1.Fig. 3 ^ a circuit arrangement for recovery of the individual signals including color subcarriers from the synchronization signal according to FIG. 1.
Das in F i g. 1 dargestellte kombinierte Synchronisiersignal weist u. a. schmale positive Impulse 2/-/auf, die die doppelte Horizonialfrequenz darstellen. Ein schmaler negativer Impuls, der als Rückstellimpuls X dient, kehrt mit einer Sequenz von vier Teilbildern wieder. Diesem Impulsgemisch ist ein Farbträger /■' überlagert. Der Rückstellimpuls X ist zeitlich so gelegt, daß die beim Betrieb mit mehreren Farbfernsehkameras sich ergebenden unterschiedlichen Kabellängen einen Laufzeitausgleich nur für die doppelte Horizontalfrequenz und den Farbträger erfordern. Geringfügige zeitliche Verschiebungen des Rückstellimpulses X können hingegen ohne weiteres toleriert werden.The in Fig. 1, the combined synchronization signal shown has, inter alia, narrow positive pulses 2 / - /, which represent twice the horizontal frequency. A narrow negative pulse, which serves as a reset pulse X, recurs with a sequence of four fields. A color carrier / ■ 'is superimposed on this pulse mixture. The reset pulse X is timed so that the different cable lengths resulting from operation with several color television cameras require a transit time compensation only for twice the horizontal frequency and the color carrier. Slight shifts in time of the reset pulse X can, however, be tolerated without further ado.
In Fig. 2 ist eine Schaltungsanordnung dargestellt, mit der das komplexe Synchronisiersignal gebildet werden kann. Die positiven Impulse 2H und die negativen Rückstellimpulse X werden zunächst Trennslufen 11 und 12 zugeführt und über KC-Glieder 13, 15 und 14, 16 additiv gemischt. Über einen Rcsonanzscliwingkreis 17 gelangt das A72//-lmpul.>gemisLh an einen Ausgangsverstärker 20. Dort wird über einen Kondensator 19 der Farbträger /-"überlagert.In Fig. 2 a circuit arrangement is shown with which the complex synchronization signal can be formed. The positive pulses 2H and the negative reset pulses X are first fed to separating lines 11 and 12 and are additively mixed via KC elements 13, 15 and 14, 16. Via a resonance resonance circuit 17, the A72 // impulse.> GemisLh arrives at an output amplifier 20.
Um Oberwellen der XiIH-Impulse im Bereich derTo avoid harmonics of the XiIH pulses in the range of
Farbträgerfrequenz zu unterdrücken, die bei der Rückgewinnung des Farbträgers Fzu Störungen führen würden, wird der Resonanzkreis 17 frequenzmäöig entsprechend abgestimmt.To suppress color subcarrier frequencies, which would lead to interference in the recovery of the color subcarrier F , the resonance circuit 17 is tuned accordingly in terms of frequency.
Die Schaltungsanordnung gemäß Fig. 3 dient der Rückgewinnung der einzelnen Signale aus dem komplexen Synchronisiersignal.The circuit arrangement according to FIG. 3 is used to recover the individual signals from the complex synchronization signal.
Zur Abtrennung des Farbträgers F wird ein auf die Farbträgerfrequenz abgestimmter Resonanzvirstärker 22 verwendet. Der Rückstellimpuls X wird über einen Begrenzerverstärker 24 au: dem komplexen Synchronisiersignal rückgewonnen. Zur Rückgewinnung der Impulse 2H wird in einem Resonanzkreis 21 zunächst der Farbträger /-"unterdrückt. Das durch den Resonanzkreis 21 hirdurchtretende Signal wird einem Begrenzerverstärker 23 zugeführt. Damit stehen die Signale F. 2H und X an der Farbfernsehkamera wieder getrennt zur Verfügung, aus denen alle Steuersignale der Kamera abgeleitet werden können.To separate the color carrier F , a resonance amplifier 22 that is matched to the color carrier frequency is used. The reset pulse X is recovered from the complex synchronization signal via a limiter amplifier 24. "Suppresses the hirdurchtretende through the resonant circuit 21 signal is supplied to a limiter 23 This provides the signals F. 2H and X to the color television camera again separately provided, from which - to recover the pulses 2H color carrier is in a resonant circuit 21 initially /.. all control signals of the camera can be derived.
Hiereu 1 Blatt ZeichnungenHere 1 sheet of drawings
Claims (7)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2720696A DE2720696C2 (en) | 1977-05-07 | 1977-05-07 | Method for the transmission of color carriers and synchronization pulses to several externally synchronized color television cameras |
AT855877A AT353862B (en) | 1977-05-07 | 1977-11-29 | METHOD FOR TRANSFERRING COLOR CARRIERS AND SYNCHRONIZING IMPULSES TO SEVERAL COLOR TELEVISION CAMERAS TO BE SYNCHRONIZED EXTERNALLY, AND CIRCUIT ARRANGEMENT TO THIS |
FR7803215A FR2390058A1 (en) | 1977-05-07 | 1978-02-06 | |
GB4707/78A GB1547133A (en) | 1977-05-07 | 1978-02-06 | Method of transmitting chrominance carriers and synchronizing pulses to a plurality of remote colour television cameras to be synchronized |
IT22944/78A IT1095729B (en) | 1977-05-07 | 1978-05-03 | DEVICE TO TRANSMIT THE COLOR CARRIER AND SYNCHRONIZATION PULSES TO MULTIPLE COLOR TELEVISION CAMERAS TO BE SYNCHRONIZED OUTSIDE |
NL7804868A NL7804868A (en) | 1977-05-07 | 1978-05-05 | METHOD AND CIRCUIT FOR TRANSFERRING COLOR CARRIER AND SYNCHRONIZATION PULSES TO MULTIPLE, EXTERNALLY SYNCHRONIZED COLOR TV CAMERAS. |
CH498278A CH628480A5 (en) | 1977-05-07 | 1978-05-08 | Method of transmitting colour carrier and synchronisation pulses to several colour television cameras which are to be synchronised externally |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2720696A DE2720696C2 (en) | 1977-05-07 | 1977-05-07 | Method for the transmission of color carriers and synchronization pulses to several externally synchronized color television cameras |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2720696B1 DE2720696B1 (en) | 1978-06-22 |
DE2720696C2 true DE2720696C2 (en) | 1979-02-22 |
Family
ID=6008380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2720696A Expired DE2720696C2 (en) | 1977-05-07 | 1977-05-07 | Method for the transmission of color carriers and synchronization pulses to several externally synchronized color television cameras |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT353862B (en) |
CH (1) | CH628480A5 (en) |
DE (1) | DE2720696C2 (en) |
FR (1) | FR2390058A1 (en) |
GB (1) | GB1547133A (en) |
IT (1) | IT1095729B (en) |
NL (1) | NL7804868A (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1537104B2 (en) * | 1967-12-01 | 1971-05-13 | Fernseh Gmbh, 6100 Darmstadt | METHOD FOR TRANSFERRING THE SYNCHRONIZATION INFORMATION INCLUDING THE COLOR CARRIER TO OR IN A COLOR VIEWING STUDIO |
US3668316A (en) * | 1968-01-31 | 1972-06-06 | Riker Communications Inc | Transmission system for overlapping pulses |
GB1216750A (en) * | 1968-09-26 | 1970-12-23 | British Broadcasting Corp | Synchronising periodic signals |
-
1977
- 1977-05-07 DE DE2720696A patent/DE2720696C2/en not_active Expired
- 1977-11-29 AT AT855877A patent/AT353862B/en not_active IP Right Cessation
-
1978
- 1978-02-06 GB GB4707/78A patent/GB1547133A/en not_active Expired
- 1978-02-06 FR FR7803215A patent/FR2390058A1/fr not_active Withdrawn
- 1978-05-03 IT IT22944/78A patent/IT1095729B/en active
- 1978-05-05 NL NL7804868A patent/NL7804868A/en not_active Application Discontinuation
- 1978-05-08 CH CH498278A patent/CH628480A5/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AT353862B (en) | 1979-12-10 |
GB1547133A (en) | 1979-06-06 |
ATA855877A (en) | 1979-05-15 |
CH628480A5 (en) | 1982-02-26 |
FR2390058A1 (en) | 1978-12-01 |
IT1095729B (en) | 1985-08-17 |
NL7804868A (en) | 1978-11-09 |
DE2720696B1 (en) | 1978-06-22 |
IT7822944A0 (en) | 1978-05-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8339 | Ceased/non-payment of the annual fee |