JPS63253776A - Video switcher - Google Patents

Abstract

PURPOSE:To enable a reciprocal entry only executing reentry an output from a first video effect amplifier to the input of a second video effect amplifier by switching first and second control signals controlling first and second input selection switches by means of a control signal changeover switch, then outputting them. CONSTITUTION:First and second control signals to control the first and the second input selection switches in first and second video effect strings 13, 23, are switched by the control signal switching switch 3, then impressed. Hence video signals to be outputted to the first and the second video effect amplifiers can be reciprocally switched. Therefore, only by entering an output from the first video effect amplifier to the input of the second video effect amplifier, the reciprocal entry can be virtually attained with less number of delay circuits and cross points.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video switcher that allows mutual reentry by using video effect outputs as the video effect inputs of each other.

[Conventional technology]

Conventionally, this type of video switcher inputs the output of the first video effect row 113 to the input of the second video effect row 223, as shown in FIG. The operation console 1
1+, 22. The control logic units 112 and 222 decode the instructions and apply the first and second control signals to the first and second video effect columns 113 and 223, respectively. Figure 4 shows this first example. Second video effect row 11
3.223 is a detailed configuration diagram.

A plurality of video signals are transmitted to video input lines 31, 32 . ~.

3m respectively. The input switch 1O receives a first control signal and switches the video input lines 31, 32 . . . based on the input first control signal. .about., 3m is selected and outputted to the switch output line KII+K21. The video signals output to the switch output line KIf+K21 are respectively passed through the video delay switching circuit 16 and sent to the entry line 12. It is output to 22. The video effect amplifier 14 is connected to the entry line K12. 22 video signals are mixed and processed to produce two output signals 18. .

182 is output. On the other hand, the input selection switch 20 is
The input selection switch IO operates in the same manner as the first input selection switch IO based on the input second control signal, and the video signal is output to the switch output lines LLl and L21, and the output video signal is Video delay switching circuit 26, entry line LI2. The signals are mixed by the video amplifier 24 through the L22 and output as two output signals 281 and 282. Each output ta2 of the video effect amplifier 14.24
．． 282 are connected to the video output line 4 via the delay switching circuits 19 and 29 and the output cross point PI+ 22, respectively.
2 is output. Output 18 of video effects amplifier 14. is connected to the entry line L12. through the cross point of the effect input switch 27. L22 and the output 28. of the video amplifier 24. 12. is sent to the entry line via the cross point of the effect input selection switch 17. is connected to 22, and the output is 188.28! respectively serve as reentry signals. The video signal 40 is output without going through the video effect amplifiers 14 and 24, and the video delay circuit 41 matches the phase of the output from the delay switching circuit 19.29 with the phase of the video signal 40. Here, the input selection switch 10
．． Video delay switching circuit 16. A video effect amplifier 14 constitutes a first video effect array 113, and an input selection switch 20. Video switching circuit 26. A video effect amplifier 24 constitutes a second video effect array 223. All ten points are cross points, and when the output of the first video effect row l13 is the input of the second video effect row 223, the video delay switching circuit 16.26 and the delay switching circuit 19.29 The 1,000-mark cross point is turned on, and the second video effect column 223
When the output of is the input to the first video effect array 113, the ten cross points are turned off and the n cross points are turned on. The delay amounts of the video delay switching circuits 16 and 26 are matched to the delay amounts of the video effect amplifiers 24 and 14, respectively.

The delay switching circuits 19 and 29 are provided to match the phase with the video signal 40 outputted via the video delay circuit 41.

[Problem that the invention seeks to solve]

In the conventional video switcher described above, when changing the mutual reentry system, the input/output switching of the video effect amplifier is mainly performed, so the first video switcher with the same configuration is usually used. There is a drawback that a second video effect train must be provided, and a large number of cross points must be provided in the video delay circuit, delay switching circuit, etc., and switching operations must be performed each time the system is changed.

[Means for solving problems]

The video switcher of the present invention includes a first and a second console for instructing adjustment of a plurality of video signals; The first console is connected to the second console, and the instructions from the first console and the second console are transmitted to the second console. The first control signal is converted into a second control signal and output. a second control logic section; when in the first switch position, the first and second control signals are respectively applied to the first and second control logic sections; Output to the second control output terminal,
When in the second switch position, the first switch position. A control signal changeover switch that outputs a second control signal to a second and first control output terminal, respectively; a plurality of video input lines to which a plurality of video signals are respectively applied; and a first and second control output. A first or second control signal is input from each end of the video input line, and the video signal of the video input line is changed to the first or second control signal, respectively, based on the input first or second control signal.
The first switch outputs to the second switch video output line. The video signals output to the second input video selection switch and the first switch video output line are input, mixed and processed to the first. a first video effect amplifier outputting to a second output terminal; inputting the output of the second output terminal of the first video effect amplifier;
An output delay circuit that delays the video signal, an input delay circuit that inputs the video signal output from the second switch video output line, and when an on control signal is input, the output of each input delay circuit is connected to the respective entry line. When an OFF control signal is input, the entry crosspoint disconnects the connection, and when an ON 1t(] control signal is input, the output of the first output terminal of the first video effect amplifier is connected to each other. A reentry crosspoint that connects to the entry line and disconnects when an off control signal is input, and a second video effect amplifier that inputs the video signal output to the entry line, mixes it, and outputs it. and a first output cross point that outputs the output of the output delay circuit to the video output line when an on control signal is input, and a first output cross point that outputs the output of the second video effect amplifier to the video output line when an on control signal is input. and a second output cross point.

[Operation] In this way, the first and second control signals that control the first and second input selection switches are selectively applied by the control signal changeover switch, so that the first and second video effect amplifiers By being able to mutually switch the video signals to be used, a video switcher that can substantially perform mutual reentry can be realized simply by re-entering the output of the first video effect amplifier to the input of the second video effect amplifier.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the video switcher of the present invention, and FIG. 2 is a block diagram showing one embodiment of the video switcher of the present invention. Second video effect row 13.2
3 is a configuration diagram showing details around 3. FIG.

The operation consoles 1□, 21 have a large number of instruction means for issuing instructions for processing video signals. Control logic section 12.
22 is the operation console 1. ．． 2. Decodes and outputs instructions from. When the control signal selector switch 3 is in position N, the outputs of the control logic units 12 and 22 are respectively switched from the control output terminals ClO2 to the first . It is output to the second video effect arrays 13, 23, and when the position is normal, the output of the control logic section 22.12 is sent from the control output terminals C, , C2 to the first. The output is switched to the second video effect row 23.13. In this case, the first
．． The number of cross points in the second video effect row 13°23 is different, but the operation console 1. .

28. The control logic section 12.22 is configured in accordance with the maximum number of cross points so that it can be switched in either direction.

The input selection switches 10 and 20 are controlled by the outputs from the respective output terminals c, C2 of the control signal changeover switch 3, select a predetermined video line from among the plurality of video input lines, and output the video signal of the video line. Switch output line KI1. 21 and the switch output lines Lll and L21. The video effect amplifier 14 is connected to the switch output line □, to 2
1, the input video signals are mixed and output as two video outputs 12° and 13. Delay circuit 21
．． 22 is a switch output line that has the same amount of delay as the amount of delay between the input and output of the video effect amplifier 14! JI1.
It supplies the video signal of L21 and outputs it. The entry input switch 23 selects the entry line L21 based on the control signal input from the output terminal C2 of the control signal changeover switch 3.
outputs the output of the delay circuit 21 or the video output 12 of the video effect amplifier 14, and outputs the output of the delay circuit 22 or the video effect to the entry line L22.
Output 2. The video effect amplifier 24 is connected to the entry line L21. A video signal from L22 is input, mixed processing is performed, and video output 25 is output. When the output cross point P+ is selected by the control signal from the output terminal C8°C7, the video output 13 is sent to the video output line 4 via the delay circuit 11.
When the output cross point P2 is selected, the video output 25 is output to the video output line 42. Video signal 40. The video delay circuit 41 is the same as that in the conventional example, so a description thereof will be omitted. Here, the first video effect row 1
3 consists of an input selection switch 10 and a video effect amplifier 14, and a second video effect row 23 consists of an input selection switch 20, delay circuits 21 and 22, an entry input switch 23, and a video effect amplifier 24.

In this embodiment, operation consoles 1 and 2, control logic section 1, . 2
2 is configured according to the maximum number of cross points to be controlled, but cross points other than input selection switches 10 and 20 may be operated from other independent switches to reduce the number of switching connection points. it is obvious.

〔Effect of the invention〕

As explained above, the present invention has the following features: The first one controls the second input selection switch. Since the second control signal is switched and applied by the control signal changeover switch, the first. By being able to mutually switch the video signals to be output to the second video effects amplifier, simply by re-entering the output of the first video effects amplifier to the input of the second video effects amplifier,
This has the effect of substantially realizing mutual reentry with a small number of delay circuits and cross points.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the video switcher of the present invention, and FIG. 2 is a block diagram showing one embodiment of the video switcher of the present invention. Second video effect row 13+2
3 is a block diagram showing the details of the periphery of 3, FIG. 3 is a block diagram showing the conventional example, and FIG. 4 is a block diagram showing the first and second video effect columns 113.
223 is a configuration diagram showing the vicinity thereof. 1 , , 2 , ------ Operation console, 12 , 22
"""Control logic section, 3
----- Control signal changeover switch, 13------
---------First video effect row, 23------
--------Second video effect row, 10, 20--
---------- Input selection switch, 31.32.
~, 3m = video input video deer line...
...Output delay circuit, 12.13.25----
-----Video output, 14, 24---------
--Video effect amplifier, 21, 22------
1 input delay circuit, 23--
- Input switch for reentry, 40
---------Video signal, 41-----------
−−−−Video delay circuit, 42−−−−−−−−−−−
---One video output line.

Claims (1)

[Claims] First and second consoles for instructing adjustment of a plurality of video signals; first and second control logic sections that convert the instructions into first and second control signals, respectively, and output the first and second control signals; Output to the second control output terminal,
When in the second switch position, a control signal changeover switch outputs the first and second control signals to the second and first control output terminals, respectively; A first or second control signal is inputted from the video input line and the first and second control output terminals, respectively, and the video signal of the video input line is changed to the respective first or second control signal based on the inputted first or second control signal. 1,
The first and second input video selection switches output to the second switch video output line, and the video signal output to the first switch video output line is input, mixed, and output to the first and second outputs. inputting the output of the first video effect amplifier output to the end, and the output of the second output end of the first video effect amplifier;
An output delay circuit that delays the video signal, an input delay circuit that inputs the video signal output from the second switch video output line, and when an on control signal is input, the output of each input delay circuit is connected to the respective entry line. When an OFF control signal is input, the entry cross point is disconnected, and when an ON control signal is input, the output of the first output terminal of the first video effect amplifier is connected to each entry line. A reentry crosspoint that connects and disconnects when an off control signal is input, a second video effect amplifier that inputs the video signal output to the entry line, mixes it, and outputs it. The first output cross point outputs the output of the output delay circuit to the video output line when a control signal of ON is input, and the second output cross point outputs the output of the second video effect amplifier to the video output line when the ON control signal is input. A video switcher having two output cross points.