JPH07170447A - Video signal processing method - Google Patents

Abstract

PURPOSE:To obtain diversified excellent expression by setting expression of changes organically. CONSTITUTION:Signals of buses A, B fed to input terminals 1a, 1b are fed respectively to frame memories 3a, 3b. Furthermore, timing control circuits 7a, 7b and address control circuits 8a, 8b are controlled by a control microcomputer 9. Moreover, signals read from the frame memories 3a, 3b are fed respectively to a compositing circuit 11. Furthermore, the signal from the frame memory 3b is fed to a key signal generating circuit 12. Signals from each button on an operation panel 15 and a variable resistor 51 relating to a fader lever or the like are fed to the microcomputer 9. Optional arithmetic operations are made by the microcomputer 9 and compositing by the compositing circuit 11 is executed based on numerals obtained through the arithmetic operation. Then the composite signal is obtained at an output terminal 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing method used when synthesizing a plurality of video signals in editing video signals, for example.

[0002]

2. Description of the Related Art Conventionally, when editing a video signal, as shown in FIG. 9, for example, VTRs 61a, 61b on the reproducing side are used.
And a control device 63 for controlling the operation of the VTR 62 on the recording side.
Is provided. Further, there is provided a video effect device 64 for switching the video signals reproduced from the VTRs 61a and 61b on the reproducing side, synthesizing them, or applying a desired effect to the VTR 62 on the recording side. Furthermore, the VTR 61a on the playback side,
The VT on the recording side is processed by processing the audio signal reproduced from 61b.
It was necessary to provide a mixer device 65 for supplying to R62.

Therefore, when the video signal is edited by the conventional device, the control device 63, the video effect device 64, the mixer device 65 and the like are required in addition to the VTR. Therefore, the entire structure of the device becomes large. In addition, adjustments and the like for smoothly exchanging signals between these devices are required, and so-called setup for that is extremely complicated. On the other hand, a video signal processing device in which the control device 63, the video effect device 64, the mixer device 65, and the like described above are housed in one is considered.

By the way, in editing the above-mentioned video signal,
In the video effect device 64, for example, two video signals are combined and switched. In that case, conventionally, for example, as shown in FIG. 10, the video signals of the VTRs 61a and 61b on the reproducing side are supplied to the input terminals 71a and 71b. The video signals from the input terminals 71a and 71b are combined by the combining circuit 72.
Is synthesized by.

A variable resistor 73 interlocking with a fader lever (not shown) is also provided. Then, the signal from the variable resistor 73 is supplied to the synthesizing circuit 72 to control the synthesizing ratio of the video signals. Furthermore, the synthesis circuit 72
The video signal combined in (3) is taken out to the output terminal 74.

[0006]

However, in the above-mentioned circuit, the movement of the conventional device may not be smooth if the fader lever is manually moved. Therefore, for example, a method of providing a means for setting a change time (transition) and automatically controlling so that the change is completed during the time (frame number) set here has been considered. However, in the conventional automatic control method, the change is linearly performed at a constant rate. For this reason, the expression of change was inorganic and poor in expression.

[0007] This application was made in view of such a point, and the problem to be solved is that the expression of the change is inorganic and the expression power is poor in the conventional device. is there.

[0008]

A first means according to the present invention is a video signal processing method for selecting a plurality of video signals and synthesizing them to form one video signal. This is a video signal processing method that has means (microcomputer 9) for controlling the ratio at which the video signals (input terminals 1a, 1b) are combined, and the trajectory of control of this ratio is performed by changes other than straight lines. .

According to a second aspect of the present invention, in the video signal processing method according to the first aspect, the control locus of the ratio is a period in which the first and second video signals are combined at the same ratio. Is long (FIG. 4).

According to a third means of the present invention, in the video signal processing method according to the first means, the control locus of the ratio is changed at a constant ratio of the ratio of the first and second video signals. With respect to a straight line that vibrates and changes between this straight line and the position where only one video signal is present (Fig. 5)
This is the video signal processing method.

According to a fourth means of the present invention, in the video signal processing method according to the first means, the trajectory of control of the ratio is changed at a constant ratio of the ratio of the first and second video signals. The image signal processing method is such that the image signal is oscillated and changed at an arbitrary amplitude around a straight line (FIG. 7).

[0012]

According to this, since the change is controlled non-linearly, the expression of the change becomes organic and the expressive power can be enriched.

[0013]

1 shows an entire system to which a video signal processing method of the present invention is applied. In FIG. 1, a video signal processing device 100 in which all the above-mentioned devices are integrated is provided. The reproducing side VTR1 as a signal source
01 and 102, and the recording side VTR 1 in which the edited result is stored
03 is connected. Furthermore, the main monitor receiver 104
The recording side monitor receiver 105 is connected to the recording side VTR 103.

Next, FIG. 2 shows an example of an operation panel of the video signal processing apparatus 100. In FIG. 2, the operation panel includes a VTR control unit 201, an audio signal mixer unit 202,
The image effect section 203 and other display sections and setting sections are divided. The VTR control unit 201 is provided with a means for remotely controlling the operation of each VTR and a means for determining an edit point. Further, the audio signal mixer section 202 is provided with means for adjusting the levels of the audio signals from each VTR and other audio signals and mixing them.

Further, the video effect section 203 includes a transition setting section 31, an input selecting section 32, and a composite type setting section 3.
3, wipe pattern selection unit 34, input effect selection unit 35,
It is divided into a correction adjustment unit 36. When synthesizing video signals, for example, first, the signal source of one video signal (A bus) and the signal source of the other video signal (B bus) to be synthesized by the input selection unit 32 are selected.

Next, a freeze (still image) button, a multi-screen button, a flash button, a mosaic button, a picture trail (afterimage effect) button, a posterization (brightness simplification) button, a zoom button, etc., provided in the input effect selection section 35 are provided. For each of the A bus video signal and the B bus video signal,
Each video processing is selected. Further, by using various wipe pattern buttons or the like provided in the wipe pattern selection unit 34, a combination pattern of the video signal of the A bus and the video signal of the B bus is set.

Further, a normal mix button, a mosaic mix button, a posterization mix button, a black and white mix button, a luminance clip transition mix button, a luminance key button 331, a chroma key button, a picture-in-picture button, etc., provided in the composite type setting section 33. Is used to set the combination type of the video signal of the A bus and the video signal of the B bus.

A fader lever 311 provided in the transition setting section 31 is used to synthesize A
The ratio at which the video signal of the bus is combined with the video signal of the B bus and switched is set. Alternatively, the time setting button 312
According to the change time (number of frames) set in step 1, automatic control is performed so that the change is completed in the meantime. 31
A time display unit 3 displays a set time (number of frames).

The internal circuit for synthesizing the video signals is constructed as follows. That is, in FIG. 3, the signals of the A bus and the B bus supplied to the input terminals 1a and 1b are supplied to the frame memories 3a and 3b through the A / D converters 2a and 2b, respectively. Further, the signals from the input terminals 1a and 1b are supplied to the sync separation circuits 4a and 4b, respectively, and the separated sync signals are written in the write address generation circuit 5.
a, 5b. The write address from the generation circuits 5a and 5b is supplied to the frame memories 3a and 3b, and the input signal is written.

The signals from the reference synchronization generating circuit 6 are supplied to the timing control circuits 7a and 7b, and the signals from the timing control circuits 7a and 7b are supplied to the address control circuits 8a and 8b, respectively. And these timing control circuits 7a and 7b and address control circuits 8a and 8b
Are controlled by the control microcomputer 9. The frame memories 3a and 3b are read by the addresses from the address control circuits 8a and 8b.

Further, the signals read out from the frame memories 3a and 3b are D / A converters 10a and 1a, respectively.
It is supplied to the synthesis circuit 11 through 0b. Further, for example, the signal read from the frame memory 3b is supplied to the key signal forming circuit 12. Furthermore, the wipe synthesis control circuit 13
Is provided, and the control signal from the generating circuit 13 and the key signal formed by the forming circuit 12 are supplied to the combining circuit 11.

Then, the type of the control signals formed by the wipe combination control circuit 13 and the ratio of change that is combined and switched, the wipe pattern and its movement, and the key signal formed by the key signal forming circuit 12. The type (chroma key / lumina key / picture in picture) and the like are controlled by the microcomputer 9. The signal from the synthesis circuit 11 is taken out at the output terminal 14.

Signals from the buttons on the operation panel 15 are supplied to the microcomputer 9. Further, the operation panel 15 is provided with a variable resistor 51 associated with, for example, a fader lever, and a signal from the variable resistor 51 is supplied to the microcomputer 9 through the A / D converter 52.

In this circuit, for example, various wipe pattern buttons of the wipe pattern selection unit 34 are used to set a combination pattern, and a fader lever 311 of the transition setting unit 31 is used to set a combination ratio. Alternatively, automatic control is performed so that the change is completed in the meantime according to the change time (number of frames) set by the time setting button 312.

In this automatic control, the trajectory of control of the composition ratio is changed as shown below according to the progress of the change time (transition). In the following description, the mix ratio is a value of mix ratio = (image after change) ÷ (overall).

That is, in FIG. 4, the solid line shows the case where the conventional rate of change is constant. On the other hand, as indicated by the broken line to the alternate long and two short dashes line, the period during which the video of the A bus and the video of the B bus are combined at the same ratio is set to be long. As a result, the change is controlled non-linearly, the expression of the change becomes organic, and the expressive power can be enriched.

Alternatively, as shown in FIG. 5, the trajectory of the ratio control is a straight line in which the ratio of the image on the A bus and the image on the B bus is changed at a constant rate, but only on this line and one image. It is controlled so as to oscillate and change between the positions having the following ratio. By this, for example, when combined with a composition in which the image slides in the vertical direction, the image that has hitherto only dropped linearly, but as shown in FIG. A change that gradually touches down is expressed.

Further, as shown in FIG. 7, the trajectory of the ratio control oscillates at an arbitrary amplitude around a straight line at which the ratio of the image on the A bus and the image on the B bus changes at a constant rate. Controlled to change. As a result, when combined with, for example, a circular wipe pattern, a change in which a circular image emerges from the center of the screen as shown in FIG. 8 is expressed.

In this way, according to the above apparatus, since the change is controlled in a non-linear manner, the expression of the change becomes organic and the expressive power can be enriched.

The change in the control trajectory of the ratio described above can be obtained by calculating the control numerical value by the microcomputer 9 with respect to the conventional numerical value given when the change ratio is constant. This calculation can be performed by setting a trajectory function in advance. For example, in the case of the above-mentioned fall, the user sets the gravity (acceleration), the coefficient of repulsion, the number of rebounds, etc. The calculation may be performed according to the law.

[0031]

According to the present invention, since the change is controlled non-linearly, the expression of the change becomes organic and the expressive power can be enriched.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an example of an apparatus for implementing a video signal processing method according to the present invention.

FIG. 2 is a diagram for explaining the explanation.

FIG. 3 is a configuration diagram of an example of a main part thereof.

FIG. 4 is a diagram showing an example of a trajectory of ratio control.

FIG. 5 is a diagram showing another example of the trajectory of ratio control.

FIG. 6 is a diagram for explaining the explanation.

FIG. 7 is a diagram showing another example of the locus of ratio control.

FIG. 8 is a diagram for explaining the explanation.

FIG. 9 is a configuration diagram of a conventional device.

FIG. 10 is a configuration diagram of a circuit for performing conventional synthesis.

[Explanation of symbols]

 100 video signal processing apparatus 101, 102 playback side VTR 103 as a signal source recording side VTR 104 main monitor receiver 105 recording side monitor receiver 201 VTR control section 202 audio signal mixer section 203 video effect section 31 Transition setting part 311 Fader lever 312 Time setting button 313 Time display part 32 Input selection part 33 Composite type setting part 331 Luminance key 34 Wipe pattern selection part 35 Input effect selection part 36 Correction adjustment part 1a, 1b Input terminals 2a, 2b A / D converter 3a, 3b Frame memory 4a, 4b Synchronous separation circuit 5a, 5b Address generation circuit 6 Reference synchronous generation circuit 7a, 7b Timing control circuit 8a, 8b Address control circuit 9 Microcomputer 10a, 10b D / A conversion Device 11 Combining circuit 12 Key signal forming circuit 13 Wipe signal generating circuit 14 Output terminal 15 Operation panel 51 Variable resistor 52 A / D converter

Claims (4)

[Claims] 1. A video signal processing method for selecting a plurality of video signals and synthesizing them to form one video signal, comprising means for controlling a ratio of synthesizing the first and second video signals. Then, a video signal processing method in which the trajectory of control of this ratio is performed by a change other than a straight line. 2. The video signal processing method according to claim 1, wherein the trajectory of control of the ratio is a video in which the period in which the first and second video signals are combined at the same ratio is long. Signal processing method. 3. The video signal processing method according to claim 1, wherein the trajectory of the ratio control is a straight line in which the ratio of the first and second video signals is changed at a constant rate. And a video signal processing method adapted to vibrate and change between a position where only one video signal is present. 4. The video signal processing method according to claim 1, wherein a locus for controlling the ratio is arbitrary with a straight line at which the ratio of the first and second video signals is changed at a constant ratio as a center. A video signal processing method adapted to vibrate and change with the amplitude of.