JPH02247872A - Editing device - Google Patents

Abstract

PURPOSE:To overlap two videos with one system of signal by previously storing the digital video signal which is no processes as to gradually face away the video and adding the same to the signal which is no processed as to gradually produce the video. CONSTITUTION:The brightness of the video corresponding to the video signal gradually lowers when the output of a digital data generating circuit 10 is gradually increased within the set time and is subtracted from the video signal subjected to an A/D conversion 2 by a subtractor 4 in a control circuit 11. This video signal is stored in a memory 16 and is used as a fade-out signal. The video signal of the other scene is then put into the subtractor 4 and the output of the generating circuit 10 decreasing gradually within the set time is subtracted, by which the brightness of the video is gradually increased and the fade-in signal is obtd. Both these signals are added by an adder 6 and are overlapped. The constitution of the editing system is simplified in this way and the device which allows easy edition is obtd.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an editing device for video editing, and more specifically, the present invention relates to an editing device for video editing. The present invention relates to an editing device suitable for electronic editing in which as a video of one scene gradually disappears (fade out), a video of another scene gradually appears (fade in).

<Conventional technology> Conventionally, when performing the above-mentioned editing, two material tapes on which two videos are recorded are prepared, and two video tape recorders are used to play back these material tapes. In addition to processing the two systems of video signals input from both video tape recorders, an editing device for controlling each video tape recorder and a video tape recorder for recording the edited video signals were required.

<Problem to be solved by the invention> As described above, the conventional system requires a professional editing device with advanced editing functions for processing two systems of video signals and three video tape recorders, resulting in a large system. Therefore, it was not possible to edit it easily. Therefore, it has been difficult to provide such an editing function to, for example, a camera-integrated video tape recorder.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an editing device capable of the above-described editing with a relatively simple configuration.

Means for Solving the Problems> In order to achieve the above object, the present invention provides an A/D conversion circuit that A/D converts an input analog video signal, and an A/D conversion circuit whose value is set according to a setting operation. digital data generating means for generating digital data that gradually increases or decreases over time; a subtracter to which the digital video signal from the A/D conversion circuit and the digital data are input; storage means for storing the output of the subtracter in advance; an adder for adding the output of the subtracter and the output of the subtracter stored in advance in the storage means; and D/A converting the output of the adder. It is equipped with a D/A conversion circuit.

<Operation> According to the above configuration, for example, by subtracting digital data whose value gradually increases from the digital video signal, the brightness level of the video corresponding to the digital video signal is gradually lowered, The effect is that the image gradually disappears (fade out), and conversely, by subtracting digital data whose value gradually decreases from the digital video signal, the image gradually appears (fade in). ).

Therefore, a digital video signal processed so that the image gradually disappears is stored in the storage means in advance, and then a digital video signal processed so that the video gradually appears is stored in the storage means in advance. By adding the stored digital video signals, it is possible to overlap the two images, and edit such that as one image gradually disappears, the other image gradually appears. .

In this way, it is possible to overlap two videos by inputting only one video signal, which simplifies the configuration and reduces costs compared to conventional professional editing equipment that processes by inputting two video signals. At the same time, the number of video tape recorders required for editing will be reduced.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

Editing device of this embodiment! This allows two images to be overlapped by inputting only one video signal, and enables image expression in which one image gradually disappears while the other image gradually appears. It is configured as follows so that it can be simply fade-in/fade-out.

That is, this editing device 1 includes an A/D conversion circuit 2 that A/D converts an input analog video signal, and a value that gradually increases or decreases within a set time according to a setting operation from an operation unit 9. a subtractor 4 to which the digital video signal from the A/D conversion circuit 2 and the digital data from the digital data generation means 3 are input, and a subtractor 4 corresponding to the desired video. A storage means 5 in which the output of the subtracter 4 is stored in advance, an adder 6 that adds the output of the subtracter 4 and the output of the subtracter stored in the storage means 5 in advance, and a D/A converter for the output of the adder 6.
It is provided with a D/A conversion circuit 7 for conversion and a recording section 8 for recording the analog video signal from the D/A conversion circuit 7 onto a video tape.

This editing device! In this case, the digital data of the digital data generating means 3 is subtracted from the digital video signal which is the output of the A/D conversion circuit 2 by a subtracter 4, and the value of this digital data is gradually increased within a set time. and,
The brightness level of the video corresponding to the digital video signal output from the subtractor 4 will gradually decrease (fade out), and if the value of the digital data is gradually decreased within the set time, the subtractor The brightness level of the video corresponding to the digital video signal output from 4 gradually increases (fades in).

The digital data generating means 3 includes a digital data generating circuit 10 and a control circuit 11 that controls the generating circuit 10 based on the setting operation of the operating section 9.

As shown in FIG. 2, this digital data generating circuit 10 generates 8-bit digital data D when performing fade-in or fade-out in response to the operation of the operating section 9. -D7 and outputs it to the subtracter 4, and a VCO (voltage controlled oscillator) 12 whose oscillation frequency is controlled by a control voltage from a control circuit 11, and this VCO
Two 4-bit up/down counters 13 and 14 that count the clock of COI2 and up/down counter 1
3.14 and a switch circuit 15 for setting the initial value.

Each counter 13, 14 is provided with an up/down switching signal from the control circuit 11 for switching the counting direction, and is also provided with a load signal for taking in an initial value. An up/down switching signal is also applied to the switch circuit 15, and when the counter 13.14 is selected as an up counter (during fade-out), all contacts are closed and all 0s are given to the counter 13.14 as an initial value. Also, when counters 13 and 14 are selected as down counters (at the time of fade-in), all contacts are opened and all counters are set as initial values.
give. This initial value is taken into each counter 13, 14 by a load signal.

Therefore, when fade-out is selected as an up counter, it starts counting up from 0 and the count value is output as digital data, while when fade-in is selected as a down counter, all 1
1, that is, starts counting down from 255, and the counted value is output as digital data.

Then, when all the counted values become 1 during up-counting, a carry signal is output to VCO12 and the VCO
When the oscillation of VCO 12 is stopped and the fade-out is completed, and all the counted values become O during the down counter, a carry-down signal is output to vcot2, the oscillation of the VCO 12 is stopped, and the fade-in is completed.

FIG. 3 is a diagram showing changes in the value of digital data,
When used as an up counter, it will gradually increase from 0 to 255, and when used as a down counter, it will increase gradually from 0 to 255.
It will gradually decrease from 0 to 0. Note that this counting period, that is, the fade-in/fade-out period can be set by controlling the oscillation frequency of the VCO 12.

Figure 4 is a diagram schematically showing how the brightness level of a video signal changes when digital data is subtracted from a manually input video signal, and the vertical axis represents the brightness level. The horizontal axis shows time.

In FIG. 4, as the value of the digital data from the digital data generating means 3 gradually decreases from the maximum value during the period TI, the brightness level of the video signal output from the subtracter 4 gradually decreases. It goes high and fades in. Furthermore, as the value of the digital data gradually increases from 0 during the period T2, the brightness level of the video signal gradually decreases, and fade-out is performed.

Referring again to FIG. 1, in this editing device, two images corresponding to two scenes are overlapped, and the image of one scene is faded out, and the image of the other scene is faded in. A storage means 5 is provided in which the output of the subtracter 4 corresponding to one of the images to be faded out is stored in advance. It includes a synchronization separation circuit 17 that separates a synchronization signal from a signal, and a memory control circuit 18 that controls data writing or reading from the memory 16 based on the separated synchronization signal.

Next, in the editing apparatus l having the above configuration, as shown in FIG. 5(C), two video signals A and B corresponding to two scenes are overlapped, and one video signal A The operation of fading in the other video signal B while fading out the video signal B will be described.

First, one of the video signal A shown in FIG. Record.

And then there's the point where it's about to start fading out!
In response to the operation signal from the operation unit 9, the digital data generation means 3 generates digital data whose value gradually increases, and by subtracting this digital data, the level of the video signal A gradually decreases and fades out. be done. At this ti, recording by the recording unit 8 is stopped by a control signal from the control circuit 11 of the digital data generating means 3. Further, the portion Al of the video signal that has been faded out from the time point tl is stored in the memory 16 in advance.

Next, while inputting the other overlapping video signal B shown in FIG. 5(B), digital data whose value gradually decreases is generated. By subtracting this digital data, the level of the video signal B gradually increases and is faded in. The other faded-in video signal B is given to the adder 6, and at the same time, the one faded-out video signal AI previously stored in the memory 16 is read out and given to the adder 6. Both signals are added, i.e., overlapped,
The output of this adder 6 is D/A converted and recorded on a video tape in a recording section 8.

That is, on a videotape, two video signals A and B overlap as shown in FIG. 5(C), and one video signal A fades out while the other video signal B fades in. It will be recorded.

In this way, it is possible to overlap two videos by inputting only one video signal, which simplifies the configuration and reduces costs compared to conventional professional editing equipment that processes by inputting two video signals. At the same time, the number of video tape recorders required for editing is also reduced, making editing easier than in the prior art.

Therefore, by installing the editing device l of the present invention in, for example, a camera-integrated video tape recorder, it is possible to overlap the previously captured video with the next captured video, and also to fade in and fade out. becomes.

In the above-described embodiment, it is also possible to perform simple fade-in and fade-out by not adding the data in the memory 16.

In the above embodiment, the editing device 1 is provided with the recording section 8, but in another embodiment of the present invention, the recording section 8 is not provided and the video signal output from the D/A conversion circuit 7 is converted into a video signal. Of course, it is also possible to record the information by feeding it to a tape recorder.

<Effects of the Invention> As described above, according to the present invention, a digital video signal processed so that the video gradually disappears is stored in advance in the storage means, and then the video gradually appears. By adding the digital video signal processed in the above manner and the digital video signal stored in advance in the storage means, the two images overlap, and as one image gradually disappears, the other image gradually disappears. Editing in which images appear gradually is possible by inputting one video signal, and the configuration is simpler than conventional editing systems that process by inputting two video signals. The number of video tape recorders will also be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
Figure 3 is a diagram for explaining the value of digital data, Figure 4 is a diagram for explaining changes in the level of the video signal, and Figure 5 is a diagram for explaining overlap. FIG. 3 is a diagram showing changes in signal level. 1... Editing device, 2... A/D conversion circuit, 3...
Digital data generation means, 4: subtracter, 5: storage means, 6: adder, 7: D/A conversion circuit.

Claims (1)

[Claims] (1) A to A/D convert the input analog video signal
an A/D conversion circuit, a digital data generation means for generating digital data whose value gradually increases or decreases within a set time according to a setting operation, and a digital video signal from the A/D conversion circuit and the digital data. a subtracter into which is input, a storage means in which the output of the subtracter corresponding to a desired image is stored in advance, and the output of the subtracter and the output of the subtracter stored in the storage means in advance are added together. An editing device comprising: an adder; and a D/A conversion circuit that performs D/A conversion on the output of the adder.