DE3314359C1 - Colour signal separating circuit for recovering the two colour- subcarrier-frequency colour signal components of a PAL colour television signal - Google Patents
Colour signal separating circuit for recovering the two colour- subcarrier-frequency colour signal components of a PAL colour television signalInfo
- Publication number
- DE3314359C1 DE3314359C1 DE19833314359 DE3314359A DE3314359C1 DE 3314359 C1 DE3314359 C1 DE 3314359C1 DE 19833314359 DE19833314359 DE 19833314359 DE 3314359 A DE3314359 A DE 3314359A DE 3314359 C1 DE3314359 C1 DE 3314359C1
- Authority
- DE
- Germany
- Prior art keywords
- signal
- stage
- color
- signals
- phase
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
Prinzip der Schaltung nach F i g. 1 erläutert werden. In F i g. 2a sind die Verhältnisse dargestellt, die den noch nicht einjustierten Zustand der Phase zeigen. Der Vektor OA zeigt die Burst-Phase als Referenzphase der Zeile n. Der Vektor OB zeigt die Burstphase der vorangegangenen Zeile n— 1, die noch nicht abgeglichen ist, da die beiden Vektoren nicht aufeinander senkrecht stehen. Aus F i g. 2a ergibt sich ein Summenvektor OS aus den beiden Vektoren OA und OB und ein Differenzvektor OD aus den beiden Vektoren OA und OB. Diese Beträge der beiden Vektoren OS und OB sind nicht gleich, da der Winkel y nicht 90° beträgt. Den abgeglichenen Zustand zeigt F i g. 2b, in welchem der Winkel γ = 90° ist und somit die Beträge der Vektoren OS und 0£> gleich sind.Principle of the circuit according to FIG. 1 will be explained. In Fig. 2a shows the relationships that show the not yet adjusted state of the phase. The vector OA shows the burst phase as the reference phase of line n. The vector OB shows the burst phase of the previous line n- 1, which has not yet been aligned because the two vectors are not perpendicular to one another. From Fig. 2a results in a sum vector OS from the two vectors OA and OB and a difference vector OD from the two vectors OA and OB. These amounts of the two vectors OS and OB are not the same, since the angle y is not 90 °. The balanced state is shown in FIG. 2b, in which the angle γ = 90 ° and thus the amounts of the vectors OS and 0 £> are equal.
Die Erfindung bringt den Vorteil, daß die beschriebene Schaltungsanordnung unabhängig von Alterung sowie Temperatur der verwendeten Bauteile ist, da die Phaseneinstellung automatisch jederzeit auf ihrem optimalen Wert ist.The invention has the advantage that the circuit arrangement described is independent of aging as well The temperature of the components used is because the phase setting is automatically at its optimum at all times Is worth.
Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings
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Claims (3)
übertragen wird, bei der die Farbsignale von einem In der DE-AS 12 77 904 wird eine Regelschaltung zur Eingang über zwei parallel zueinander verlaufende Einhaltung der Verzögerungszeit in einer PAL-Lauf-Signalwege mit jeweils einem Ausgang geführt sind zeit-Signalaufspaltschaltung beschrieben. Bei dieser und in den Signalwegen eine Laufzeitleitung mit ei- wird ein Regelsignal aus dem undemodulierten V-Signal nem in seiner Phasendrehung steuerbaren Phasen- 15 gebildet, welches in einem Durchmesser nach der jV-schieber so angeordnet ist, daß die Laufzeit der Achse demoduliert wird.of the two color subcarrier-frequency color signal components, as is well known, the phase of the signals must be set in the undeconstructed color according to the PAL method as a color signal component, square-modulated with two devices and a delayed branch of a PAL decoder, so that they are in phase. It is known to be transmitted lazily during the line trace, for the purpose of phase adjustment at the output of the color signals. B. to provide in the form of eider unmodulated color carrier as a color sync signal 10 ner adjustable coil,
is transmitted, in which the color signals from a In DE-AS 12 77 904 a control circuit for input via two parallel compliance with the delay time in a PAL-run signal paths with one output each time-signal splitting circuit is described. With this and in the signal paths a delay line with a control signal is formed from the undemodulated V signal with a phase rotation controllable in its phase rotation, which is arranged in a diameter after the jV slider so that the delay of the axis is demodulated .
nehmbaren Farbsignale zueinander und andererseits Auch in der DE-AS 12 88 123 wird eine Schaltungsanmit einer Subtraktionsstufe zur Bildung der anderen Ordnung beschrieben, bei welcher ebenfalls vor der Defarbträgerfrequenten Farbsignalkomponente durch 25 modulation ein Phasenvergleich vorgenommen wird, Subtraktion der den Ausgängen der Signalwege ent- aus welchem das Steuersignal für die Änderung der nehmbaren Farbsignale voneinander verbunden Laufzeit gewonnen wird.Since the tZ signal is not taken into account, the duration of the absence is greater than on the other of the signalers that arise in this signal path, in which the outputs of the signal paths are equalized . Since the control signal in front of the F demo side is taken off with an addition stage to form the one dulator, color signal components that still occur behind the demo color carrier frequency due to the dulator cannot be added to the outputs of the signal paths and are not recorded and corrected.
Acceptable color signals to each other and on the other hand Also in DE-AS 12 88 123 a circuit arrangement with a subtraction stage for the formation of the other order is described, in which a phase comparison is carried out by modulation also before the color carrier frequency color signal component, subtraction of the outputs of the signal paths which the control signal for the change of the acceptable color signals connected to each other transit time is obtained.
beiden Pegel stets übereinstimmen. In diesem Fall besitzen die der Matrix 5 zugeführtenThe color signal F is supplied according to FIG. 1 to a GE comparison stage from a differential amplifier stage, from which it is divided into two (6) branches formed with two inputs and one output. The signal arrives via a is that the outputs of the addition stage (5+) 1 and delay line 2 to a setting controller 3 via the subtraction stage (5-) via a demodulator 45 an amplifier stage 4 to the matrix circuit 5, which (9) with the inputs of the differential amplifier stage of an addition stage 5 + and a subtraction stage (6) are connected that the differential amplifier stage fe 5- is formed and in which the U and F signals (6) during the line return to evaluate the undelayed and delayed signals he-color sync signals is activated and that is generated. The U and V signals are switched after the output of the differential amplifier stage (6) 50 modulation in a demodulator 9 to a differential control signals that can be taken from the controllable amplifier stage 6, which is switched on during the burst phase shifter (8) for such a phase change . The output signal of this Diffeseiner phase rotation are supplied that the reference amplifier is stored in a storing element 7 both inputs of the differential amplifier stage (6) and given to a phase rotator 8, thereby supplied and from the output signals 55 which soder the phase of the signal in one of the branches The addition stage (5+) and the subtraction stage readjusts for a long time until the sum and the difference at the (5--) input of the differential amplifier stage derived from the color sync signals are the same,
both levels always match. In this case, they have 5 fed to the matrix
Mit Hilfe der F i g. 2 soll an Vektordiagrammen dascharacterized in that at the output of the differential amplifier stage the output of the differential amplifier stage (6) is the output voltage 65 expediently via a switch 11 which is switched by the storing element (7). PAL switch 10 is actuated, applied to the storage capacitor 7.
With the help of FIG. 2 is supposed to be the
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833314359 DE3314359C1 (en) | 1983-04-20 | 1983-04-20 | Colour signal separating circuit for recovering the two colour- subcarrier-frequency colour signal components of a PAL colour television signal |
FR8406217A FR2544947B1 (en) | 1983-04-20 | 1984-04-19 | CHROME FLOW PHASE ADJUSTMENT CIRCUIT |
NL8401287A NL8401287A (en) | 1983-04-20 | 1984-04-19 | CIRCUIT FOR PHASE ADJUSTMENT OF A COLOR SYNCHRONIZATION SIGNAL. |
JP7876184A JPS59205890A (en) | 1983-04-20 | 1984-04-20 | Phase adjusting circuit device of color synchornizing signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833314359 DE3314359C1 (en) | 1983-04-20 | 1983-04-20 | Colour signal separating circuit for recovering the two colour- subcarrier-frequency colour signal components of a PAL colour television signal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3314359C1 true DE3314359C1 (en) | 1984-10-11 |
Family
ID=6196913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19833314359 Expired DE3314359C1 (en) | 1983-04-20 | 1983-04-20 | Colour signal separating circuit for recovering the two colour- subcarrier-frequency colour signal components of a PAL colour television signal |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS59205890A (en) |
DE (1) | DE3314359C1 (en) |
FR (1) | FR2544947B1 (en) |
NL (1) | NL8401287A (en) |
Cited By (2)
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 |
DE4308929A1 (en) * | 1992-03-27 | 1993-09-30 | Toshiba Kawasaki Kk | PAL system chrominance signal processing circuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3512546C1 (en) * | 1985-04-06 | 1986-10-16 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Comb filter circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1277904B (en) * | 1966-09-07 | 1968-09-19 | Telefunken Patent | Control circuit to maintain the delay time in a PAL runtime signal splitting circuit |
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 |
-
1983
- 1983-04-20 DE DE19833314359 patent/DE3314359C1/en not_active Expired
-
1984
- 1984-04-19 FR FR8406217A patent/FR2544947B1/en not_active Expired
- 1984-04-19 NL NL8401287A patent/NL8401287A/en not_active Application Discontinuation
- 1984-04-20 JP JP7876184A patent/JPS59205890A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE1277904B (en) * | 1966-09-07 | 1968-09-19 | Telefunken Patent | Control circuit to maintain the delay time in a PAL runtime signal splitting circuit |
Cited By (2)
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 |
DE4308929A1 (en) * | 1992-03-27 | 1993-09-30 | Toshiba Kawasaki Kk | PAL system chrominance signal processing circuit |
Also Published As
Publication number | Publication date |
---|---|
FR2544947B1 (en) | 1988-04-08 |
FR2544947A1 (en) | 1984-10-26 |
JPH0560312B2 (en) | 1993-09-02 |
NL8401287A (en) | 1984-11-16 |
JPS59205890A (en) | 1984-11-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |