JPH07274065A - Video special effect device - Google Patents

Abstract

PURPOSE:To easily generate a border effect provided with a desired pattern by storing the design border of the desired pattern in a memory, reading it, synthesizing it with border signals, generating synthetic border signals and mixing video signals and the synthetic border signals by using border key signals. CONSTITUTION:Digital video signals Y and C are inputted to mixer circuits 1 and 2 and border generation circuits 3 and 4 for luminance signals and for color difference signals generate the border signals Y and C corresponding to CPU control data. The border signals Y and C are synthesized with design border signals generated in a design border signal generation circuit 6 and inputted to the mixer circuits 1 and 2. The mixer circuits 1, 2 respectively mix the digital video signals Y, C and the synthetic border signals by using the border key signals and output the video signals Y, and C with the design border.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image special effect device, and more particularly to an image special effect device for generating a frame or a border (hereinafter referred to as a border) in an image.

[0002]

2. Description of the Related Art On television screens and the like, a variety of video expressions are made by adding a border effect to the base video,
Many special effect devices have been proposed for that purpose.

FIG. 4 is a block diagram showing an example of a conventional digital video special effect device for generating a border effect. In the figure, the digital video signal Y and the digital video signal C are the mixer circuit 101 for the luminance signal.
And each video (V) of the mixer circuit 102 for the color difference signal
Input to each terminal. In addition, Y represents a luminance signal and C represents a color difference signal. The same applies hereinafter.

The luminance signal border generation circuit 103 and the color difference signal border generation circuit 104 respectively have a border signal (Y) and a border signal (C) according to CPU control data.
To the border (B) terminals of the mixer circuits 101 and 102.

The border key generation circuit 105 includes a CPU control data, a horizontal reference signal HCLR, and a vertical reference signal VCLR.
And a clock signal CLK are input to generate a border key signal, and each key (KE) of the mixer circuits 101 and 102 is generated.
Y) Output to the terminal.

The mixer circuit 101 mixes the video signal Y and the border signal (Y) using a border key signal,
The bordered video signal Y is output. Similarly, the mixer circuit 102 mixes the video signal C and the border signal (C) using the border key signal, and outputs the bordered video signal C.

FIG. 5 shows an example of the border effect generating operation in the above-mentioned conventional configuration. The digital video signal A ((a) in the figure) and the border signal B ((b) in the figure) are mixed by the Misa key circuits 101 and 102 using the border key signal ((c) in the figure), and the video signal is framed. ((D) in the figure) is output as bordered video signals Y and C.

The brightness and color difference of this border can be freely changed by the CPU control data, and as a means for producing such a special effect, it is actually 2-2766.
There is a device disclosed in Japanese Patent No. 4 publication.

[0009]

However, in the above-mentioned conventional apparatus, since the border coloring is changed, it is not possible to generate a border effect with a pattern added, and various image representations are limited. Will be done.

It is an object of the present invention to provide a video special effect device which can easily generate a border effect with a desired pattern added.

[0011]

SUMMARY OF THE INVENTION A video special effect apparatus according to the present invention generates a border effect in a video by mixing a base video signal and a border signal using a border key signal. Design border memory storing a border, read control means for reading a design border signal from the design border memory, and border signal synthesizing means for synthesizing the border signal and the read design border signal to generate a synthesized border signal. And mixing means for mixing the base video signal and the synthesized border signal using the border key signal.

The read control means may be one that operates by a reference clock and performs read control asynchronous with the video signal, and is preferably a free-run counter. The count data is used as the read address of the design border memory.

Further, it is desirable to further have a level control means capable of controlling the level of the design border signal read from the design border memory, independently of the border signal.

[0014]

[Function] By storing a design border of a desired pattern in a memory, reading it, synthesizing it with a border signal to generate a synthesized border signal, and mixing the video signal and the synthesized border signal using the border key signal. , A border effect having a desired pattern can be generated.

Further, by performing the asynchronous read by the read control means, it is possible to obtain a special effect that the pattern of the border portion by the design border signal is constantly changed.

By controlling the level of the design border signal separately from the border signal, the intensity and color of the pattern component of the border effect can be arbitrarily set.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a video special effect apparatus of the present invention. In the figure, a design border signal generation circuit 6 surrounded by a broken line is a main part of the present invention, and is a part different from the circuit of FIG. 4 shown as a conventional example.

In FIG. 1, the digital video signal Y and the digital video signal C are input to the respective video (V) terminals of the mixer circuits 1 and 2. The brightness signal border generation circuit 3 and the color difference signal border generation circuit 4 are CPUs.
A border signal (Y) and a border signal (C) are respectively generated according to the control data. These border signals are combined with the design border signal generated by the design border signal generation circuit 6 and input to each border (B) terminal of the mixer circuits 1 and 2. Also, the border key generation circuit 5
Inputs the CPU control data, the horizontal reference signal HCLR, the vertical reference signal VCLR and the clock signal CLK to generate a border key signal and outputs it to each key (KEY) terminal of the mixer circuits 1 and 2.

The mixer circuit 1 mixes the digital video signal Y and the composite border signal (Y) using a border key signal, and outputs a video signal Y with a design border. Similarly, the mixer circuit 2 mixes the digital video signal C and the composite border signal (C) using the border key signal, and outputs the video signal C with design border.

The design border signal generating circuit 6, which is the main part of the present invention, comprises a free-run counter 10, design border ROMs (read only memories) 11 and 12, level control circuits 13 and 14, and adder circuits 15 and 16. ing.

The free-run counter 10 has a clock signal C.
The counting operation is performed according to LK, but it is not synchronized with the video synchronization signal. The count data of the free-run counter 10 is input to the design border ROMs 11 and 12,
Determine the read address.

The design border ROM 11 stores the luminance signal pattern (pattern) of the design border, decodes the count data output from the free-run counter 10, and outputs the design border signal (Y) from the address. Further, the design border ROM 12 stores the color difference signal pattern (pattern) of the design border, decodes the count data output from the free-run counter 10, and outputs the design border signal (C) of the corresponding address.

The level control circuit 13 changes the brightness level of the design border signal output from the design border ROM 11 according to the CPU control data. Similarly, the level control circuit 14 changes the color difference level of the design border signal output from the design border ROM 12 according to the CPU control data. These level control circuits 13
Since 14 and 14 are provided independently of the border generation circuits 3 and 4, the luminance and color difference levels of the design border signal can be freely changed without being restricted by the border screen. The level control circuits 13 and 14 are
For example, it is composed of a multiplication circuit.

The adder circuit 15 adds the design border signal (Y) output from the level control circuit 13 and the border signal (Y) output from the border generation circuit 3 to a mixer as a composite border signal (Y). Output to circuit 1. Further, the adder circuit 16 adds the design border signal (C) output from the level control circuit 14 and the border signal (C) output from the border generation circuit 4 to generate a combined border signal (C) in the mixer circuit 2 Output to.

The operation of this embodiment having such a configuration will be described with reference to FIGS. 2 and 3.

FIG. 2 is a schematic diagram showing a screen display of various signals for explaining the operation of this embodiment. First, a screen A in FIG. 1A is a base image composed of digital video signals Y and C. The digital video signal Y is input to the V terminal of the mixer circuit 1, and the digital video signal C is input to the mixer circuit 2. Input to the V terminal of.

A screen B shown in FIG. 3B is a screen of a border signal composed of the border signals Y and C output from the border generation circuits 3 and 4, respectively, as in the conventional example. These border signals are added to the adder circuits 15 and 1, respectively.
6 and is added to the design border signal. The luminance and color difference of each output border signal of the border generation circuits 3 and 4 are determined according to the CPU control data.

The screen D shown in FIG. 3C is a screen formed by the design border signals (Y) and (C) output from the design border ROMs 11 and 12, respectively.
This design pattern is stored in the design border ROMs 11 and 12, and is read according to the count data output from the free-run counter 10.
The read design border signals (Y) and (C) are
The level is controlled by the level control circuits 13 and 14, respectively, and is input to the adding circuits 15 and 16 to input the border signal (Y)
, And (C), and output as combined border signals (Y) and (C) to the respective B terminals of the mixer circuits 1 and 2.

The mixer circuits 1 and 2 respectively synthesize the video signal and the synthesized border signal by using the border key signal shown in FIG. 3D to generate the video signal with the design border. Thus, as shown in (e) of the figure, a composite screen in which the video screen of the screen A is framed by the screens B and D is formed.

Although FIG. 2 shows an example of a screen framed in the vertical direction, the border key signal output from the border key generation circuit 5 can of course be applied to the border effect in the horizontal direction or in both the horizontal and vertical directions. .

FIG. 3 is a schematic diagram showing in more detail another example of the screen of the video signal with the design border obtained by the present embodiment. In the figure, the video screen 31 is framed on all sides by a border screen 32 and a pattern 33. Here, the video screen 31 is the screen A of FIG. 2A, the border screen 32 corresponds to the screen B of FIG. 2B, and the pattern 33 corresponds to the screen D of FIG. 2C. That is, the border signal of the border screen 32 and the design border signal of the pattern 33 are combined by the adding circuits 15 and 16 to frame the video screen 31.

It should be noted here that the design border signal of the screen D in FIG. 2C, that is, the pattern 3 in FIG.
3 is read from the design border ROMs 11 and 12 by the asynchronous free-run counter 10,
The point is that it is not displayed statically but is always displayed in motion. This makes the design border more effective.

Design border ROMs 11 and 12
It is sufficient to store a desired design pattern in, and it is not limited to FIG. Also, a configuration in which a plurality of design patterns are stored and one of them is selected appropriately or sequentially with time is easily conceivable.

[0035]

As described above in detail, the image special effect apparatus according to the present invention stores a design border of a desired pattern in a memory, reads it out, and synthesizes it with a border signal to generate a synthesized border signal. Then, the video signal and the composite border signal are mixed using the border key signal. As a result, a border effect having a desired pattern can be generated, and the types of border effects can be varied.

Further, by reading the design border asynchronously, it is possible to obtain a special effect that the pattern of the border portion due to the design border signal constantly fluctuates.

Further, by controlling the level of the design border signal separately from the border signal, it becomes possible to arbitrarily set the intensity and color of the pattern component of the border effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a video special effect apparatus of the present invention.

FIG. 2 is a schematic diagram showing a screen display of various signals for explaining the operation of the present embodiment.

FIG. 3 is a schematic diagram showing another example of the screen of the video signal with a design border obtained in the present embodiment in more detail.

FIG. 4 is a block diagram showing an example of a conventional digital video special effect device for generating a border effect.

FIG. 5 is a schematic diagram showing a screen display of various signals for explaining the operation of the conventional device.

[Explanation of symbols]

 1 mixer circuit (for brightness) 2 mixer circuit (for color difference) 3 border generation circuit (for brightness) 4 border generation circuit (for color difference) 5 border key generation circuit 6 design border signal generation circuit 10 free run counter 11 design border ROM (luminance) 12) Design border ROM (for color difference) 13 Level control circuit (for brightness) 14 Level control circuit (for color difference) 15 Addition circuit (for brightness) 16 Addition circuit (for color difference)

Claims (11)

[Claims] 1. A design border memory storing a design border of a desired pattern in a video special effect device for generating a border effect in a video by mixing a base video signal and a border signal using a border key signal. Read control means for reading a design border signal from the design border memory; border signal synthesizing means for synthesizing the border signal and the read design border signal to generate a synthesized border signal; A video special effect device comprising: a mixing unit configured to mix a signal and the composite border signal using the border key signal. 2. The video special effect apparatus according to claim 1, wherein the design border memory is a read-only memory that outputs a design border signal according to an input address. 3. The video special effect apparatus according to claim 1, wherein the read control means is a counter that operates according to a reference clock, and outputs the count data to the design border memory as a read address. 4. A design border memory in which a design border of a desired pattern is stored in a video special effect device for generating a border effect in a video by mixing a base video signal and a border signal using a border key signal, and the design border memory. An asynchronous read control means for asynchronously reading a design border signal from a border memory; a border signal synthesizing means for synthesizing the border signal and the read design border signal to generate a synthesized border signal; and the base video. A video special effect device comprising: a mixing unit configured to mix a signal and the composite border signal using the border key signal. 5. The video special effect apparatus according to claim 4, wherein the design border memory is a read-only memory that outputs a design border signal according to an input address. 6. The video special according to claim 4 or 5, wherein the asynchronous read control means is a free-run counter which operates by a reference clock, and outputs the count data to the design border memory as a read address. Effect device. 7. The base video signal is composed of a pair of a luminance signal and a color difference signal, and the border signal is composed of a pair for luminance and a color difference. Correspondingly, the design border memory and the border signal synthesizing means. 7. The image special effect device according to claim 4, wherein each of the mixing means comprises a pair for luminance and a pair for color difference. 8. A video special effect device for generating a border effect in a video by mixing a base video signal and a border signal using a border key signal, and a design border memory storing a design border of a desired pattern, and the design border memory. Asynchronous read control means for asynchronously reading the design border signal from the border memory, level control means for controlling the level of the read design border signal independently of the border signal, the border signal and the level A border signal synthesizing means for synthesizing the controlled design border signal to generate a synthetic border signal; and a mixing means for mixing the base video signal and the synthetic border signal by using the border key signal. A special image special effect device. 9. The video special effect apparatus according to claim 8, wherein the design border memory is a read-only memory that outputs a design border signal according to an input address. 10. The video special according to claim 8 or 9, wherein the asynchronous read control means is a free-run counter which operates according to a reference clock, and outputs the count data to the design border memory as a read address. Effect device. 11. The base video signal is composed of a pair of a luminance signal and a color difference signal, and the border signal is composed of a pair for luminance and a color difference. Correspondingly, the design border memory and the border signal synthesizing means. 12. The image special effect device according to claim 8, wherein the level control means and the mixing means each include a pair for luminance and a pair for color difference.