JPH0965355A - Color synchronous coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always maintain the output SC-H timing conforming to standards by giving the same phase or the inverted phase to the SC signal generated in a local station according as the vertical phase variable extent in a synchronous coupling device is even or odd horizontal periods (H). SOLUTION: The phase-shifted SC signal from an SC.ϕ.SHIFT part 105 and a decision signal which goes to TTL level '0' at the time when the vertical phase variable extent or the signal outputted from a V PHASE part 109 is even Hs and goes to TTL level '1' at the time when this extent is odd Bs are inputted to a subcarrier control (SC CONT) part 112. This part 112 outputs the SC signal from the SC.ϕ.SHIFT part 105 with the same phase in the case of TTL level '0' and outputs it with the inverted phase (180 phase difference) in the case of TTL level '1'. Thus, the color output phase of the synchronous coupling device always have a fixed relation (conforming to standards) in accordance with the vertical synchronous output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a color television synchronous coupling device.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a block configuration of a conventional color synchronous coupling device.

Reference numeral 101 denotes burst separation (BURST / SE).
PA) part, 102 is synchronous separation (SYNC / SEPA)
And 103 are subcarrier automatic synchronization phase control (SC / A
FC) section, 104 is a direct current controlled oscillation (DC / CONT / O)
SC) part, 105 is a subcarrier phase shift (SC · φ
-SHIFT), 106 is a horizontal sync phase matching pulse generation (H-SET-P) part, 107 is a vertical sync phase matching generation (V-SYNC-SEPA) part, and 108 is a process (PROCESS) of shaping each sync signal. Reference numeral 109 is a vertical synchronization phase adjustment (V.PHASE) unit, 110 is a vertical synchronization phase adjustment pulse generation (V.SET.P) unit, and 111 is a black burst signal generation (B.B.GEN) unit.

The input VBS signal is BURST S
The EPA unit 101 has only burst signals. This burst signal is the SC of the output of the PROCESS section 108 in the subsequent stage.
(Subcarrier) signal is SC / φ / SHIFT section 105
And the phase-shifted SC signal and AFC unit 103
Are compared in phase. The AFC unit 103 uses the DC / CONT / OSC unit 104 so that the phase comparison results are in phase.
By outputting a signal for changing the phase and frequency of the OSC of the voltage control system, and changing the output of the DC / CONT / OSC section, the SC signal output from the PROCESS section 108 at the next stage becomes the burst signal. Synchronize. Also, S
The YNC / SEPA section 102 separates the sync signal,
Further, a horizontal synchronization set pulse is generated in the H / SET / P unit 106, and a horizontal counter inside the PROCESS unit 108 is set to match the horizontal synchronization of the input and output.

On the other hand, the vertical sync signal output from the V / SYNC / SEPA section 107 is set by the vertical sync variable amount in the V / PHASE section 109, whereby the V / SET / P section 110 is generated. The vertical counter in the PROCESS section 108 is set by the vertical set pulse output, and the output vertical phase is set to the set phase.

Each broadcast device (television camera, switcher, VTR, etc.) is supplied with a BB (black burst) signal, a SYNC signal or an SC signal from the synchronous coupling device, and the output signal of each device is input to the switcher. In order to align the phase at a reference point such as a point, use a synchronous coupling device,
The color and horizontal phase are variable. At this time, when the devices are installed far away from each other, it is necessary to change the vertical synchronization.

In recent years, digital equipment has been adopted as a broadcasting apparatus, and signals are delayed in units of H (horizontal period) or V (vertical period) due to digital processing. Therefore, BB signals suitable for this are supplied. It is necessary, and vertical synchronization variable of the synchronous coupling device is essential.

The problem here is that the broadcast television signal has the SC-H phase timing defined by the RS-170A standard. In the conventional technology example, the color phase is the same even if the vertical phase is changed by ± 1H. However, in RS-170A, when the vertical phase changes ± 1H, the color phase must be inverted. In order to satisfy this, in the conventional example, it is necessary to adjust the vertical phase and separately adjust the color phase, which is troublesome and difficult to work.

[0009]

In the above-mentioned prior art,
The vertical synchronization phase and the color phase have to be adjusted separately, which is troublesome and complicated in operation. In the present invention, by eliminating this defect and adjusting only the vertical synchronization phase, the BB signal and SY which always have accurate SC-H timing.
The purpose is to generate an NC signal, an SC signal and the like.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a vertical variable amount in a synchronous coupling device,
Determine whether it is an even number H or an odd number H, and SC / AFC
Phase adjustment is performed by setting the SC signal generated in the local station, which is input to the unit, to the same phase or an inverted phase for each of the discrimination signals.

As a result, the color output signal automatically corresponds to the SC-H timing of the RS-170A standard corresponding to the vertical variable amount.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG.

Reference numerals 101 to 111 in the figure have the same configuration as that in FIG. Reference numeral 112 denotes a subcarrier control (SC / CONT) unit newly added to the configuration of FIG. This SC / C
The ONT unit 112 inputs the phase-shifted SC signal from the SC / φ / SHIFT unit 105, and further inputs V / PH.
When the vertical phase variable amount of the signal output from the ASE unit 109 is, for example, even H, a TTL level “0” is input, and when it is odd H, a determination signal is set to be the TTL level “1”. Based on this determination signal, the SC / CONT unit 112
Is the SC signal from the SC / φ / SHIFT unit 105
When the TL level is "0", the signals are output in the same phase, and when the TL level is "1", the signals are inverted (phase difference 180 °) and output. As a result, the color output phase of the present synchronous coupling device always has a constant relationship (a relationship conforming to the standard) according to the vertical synchronous output.

[0014]

According to the present invention, in the synchronous coupling device, even if the vertical phase is varied, the output SC-H timing that always conforms to the standard can be maintained in accordance with the variation.

[Brief description of drawings]

FIG. 1 is a diagram showing a block configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a block configuration of a color synchronous combining device according to a conventional technique.

[Explanation of symbols]

 101 BURST / SEPA part, 102 SYNC / SEPA part, 103 AFC part, 104 DC / CONT / OSC part, 105 SC / φ / SHIFT part, 106 H / SET / P part, 107 V / SYNC / SEPA part, 108 PROCESS Section, 109 V / PHASE section, 110 V / SEP / P section, 111 BB / GEN section, 112 SC / CONT section.

Claims (1)

[Claims] 1. A composite sync signal (SYNC signal), a subcarrier signal (SC signal), a black burst signal (BB signal) from an input composite video signal (VBS signal).
In the case of a color combination device that reproduces each synchronization signal such as a color synchronization combination device that can change the vertical synchronization output phase, when the variable amount of the output vertical synchronization signal phase is an even horizontal cycle period, the input composite video SC separated from signal
The phase of the SC signal reconstructed by the device with respect to the signal is made the same phase, and when the variable amount is an odd horizontal period period, the phase is inverted and the color phase reproduced by the device corresponds to the vertical synchronization variable amount. A vertical variable synchronous coupling device characterized in that the color phase automatically becomes a phase conforming to the SC-H timing standard of RS-170A.