JPH0232684A - Video special effect generating device - Google Patents

Abstract

PURPOSE:To reduce the number of multipliers by controlling the multiplier necessary to be controlled by two control means corresponding to an inputted video signal by either control signal by providing a signal switching means to switch the control signal outputted from the two control means. CONSTITUTION:Two multipliers 10 and 12 are set as the multipliers to perform the arithmetic processing of the video signals inputted from input terminals 100 and 101. Signal switching circuits 22 and 24 to switch so as to supply either the control signals outputted from two control signal generation circuits 26 and 28 which control those multipliers 10 and 12 to the multipliers 10 and 12 are provided. And the video signals inputted from the input terminals 100 and 101 are operated by the multipliers 10 and 12, individually, The multipliers 10 and 12 are controlled by either the control signals from the control signal generation circuits 26 and 28 selected by the signal switching circuits 22 and 24, respectively. In such a way, it is possible to reduce the number of multipliers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video special effect generation device used in a television studio device that generates a new video signal by synthesizing a plurality of types of video signals.

[Conventional technology]

FIG. 2 shows the configuration of a conventional video special effect generating device of this type. In the figure, the video special effect generating device is a multiplier 3.
0, 32, 34, 36. 38, 40, adder 42.44
, control signal generation circuit 46.

48 and a polarity inversion circuit 50.

In the video special effect generation device having such a configuration, the video signal inputted from the input terminal too, 101 is as follows.
multipliers 30.32 and these multipliers 30.3
2 is controlled by a control signal output from a control signal generation circuit 46. The output signals of multipliers 30 and 32 are respectively sent to multiplier 34.

These multipliers 34 and 36 are controlled by a control signal output from a control signal generation circuit 48,
Those output signals are output to adders 42 and 44, respectively.

On the other hand, video signals input from input terminals 102 and 103 are supplied to multipliers 38 and 40, and these multipliers 38 and 38.
40 are controlled by control signals outputted from the control signal generation circuit 48 via the polarity inversion circuit 50, and their output signals are outputted to adders 42 and 44, respectively. As a result, adder 42 combines the output signals of multipliers 34 and 38, adder 44 combines the output signals of multipliers 36 and 40, and these combined signals are output to output terminals 104 and 105, respectively. be done.

In this way, a new video signal has been obtained by combining multiple types of video signals.

[Problem to be solved by the invention]

As mentioned above, in conventional video special effect generation devices, multiple multipliers are individually and directly controlled by two independent control signal generation circuits.
There is a problem in that there are locations (multipliers 30°, 32, 34, 36) that require two stages of multipliers depending on the input video signal.

The present invention was made in view of these circumstances, and
It is an object of the present invention to provide a video special effect generation device in which the number of multipliers is reduced.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a first
to a fourth multiplier, a first adder that combines the output signals of the first and third multipliers, and a second adder that combines the output signals of the second and fourth multipliers; a first control means for controlling the first and second multipliers; and a second control means for controlling the first and second multipliers and the third and fourth multipliers or the third and fourth multipliers. In response to control signals from the control means and the first and second control means, a control signal for controlling the first and second multipliers is transmitted from the first control means or the second control means to the first and second control means. and a signal switching means for switching the signal to be supplied to the multiplier.

In the video special effect generation device according to the present invention, the control signal output from the two control means for controlling the multiplier is switched by the switching means and is supplied to the multiplier, so that it is more effective than the conventional one. The number of multipliers can be reduced, and therefore the cost of the device can be reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of a video special effect generating device according to the present invention. In the figure, the video special effect generating device includes multipliers 10, 12°14, 16, and adder 1.
8.20, a control signal generation circuit 26, 28, and a polarity inversion circuit 30.

In terms of configuration, the video special effect generating device according to this embodiment differs from the conventional device shown in FIG. 2 in the input terminal 100.10.
a multiplier 30 for processing the video signal input from 1;
32, 34, and 36 are replaced by two multipliers 10.12, and either one of the control signals output from the two control signal generation circuits 26.28 that control these multipliers 10.12 is used as the multiplier. The difference is that signal switching circuits 22 and 24 are provided to switch the signal to be supplied to 10.12, and other configurations and operations are the same as those of the conventional device.

In the above configuration, the video signals inputted from input terminals 100 and 101 are individually processed by multipliers 10 and 12, respectively. Multipliers 10.12 each have control signal generation circuits 2 selected by signal switching circuits 22.24.
It is controlled by one of the control signals of 6.28.

On the other hand, the video signals inputted from the input terminals 102 and 103 are controlled by a control signal outputted from the control signal generation circuit 28 via the polarity inversion circuit 30.

Adder 18 combines the output signals of multipliers 10.14, and adder 20 combines the output signals of multipliers 12.16, and these combined signals are sent to output terminals 104.
105.

〔Effect of the invention〕

As explained above, in the present invention, a multiplier that needs to be controlled by two control means according to an input video signal is provided with a signal switching means for switching control signals output from the two control means. Since the configuration is configured such that control is performed using either one of the control signals, the number of multipliers can be reduced, and the cost of the device can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a video special effect generation device according to the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional video special effect generation device. 10.12.14.16... Multiplier, 18.2
0... Adder, 22, . 24... Signal switching circuit, 26.28.
...Control signal generation circuit. Applicant: NEC Corporation Agent
Patent Attorney Umeo Yamauchi 2

Claims (1)

[Scope of Claims] First to fourth multipliers whose input signals are video signals respectively input from four input terminals, and a first addition which combines output signals of the first and third multipliers. a second adder for combining output signals of the second and fourth multipliers; a first control means for controlling the first and second multipliers; and a first and second multiplier. and a third and fourth multiplier or a second control means for controlling the third and fourth multipliers; and a control signal for the first and second multipliers in response to control signals from the first and second control means. A video special effect generating device characterized by comprising: a signal switching means for switching so that a control signal for controlling is supplied from the first control means or the second control means to the first and second multipliers. .