JPS63240273A - Wipe key signal generating circuit - Google Patents

Abstract

PURPOSE:To easily realize a wipe of deposited shape with complicated waveform by providing a mixer section mixing a basic wipe waveform from a basic wipe waveform generating section and a reproduction signal from a memory section in a television program producing device or the like and outputting the mixture signal from the mixer section as a wipe waveform and feeding it back to the input of the memory section. CONSTITUTION:The mixer section 3 mixes a basic wipe waveform from a basic wipe waveform generating section 1 and a reproducing signal from a memory section 2. In order to obtain a random and multiple wipe effect, at first the memory section 2 is brought into a no signal state and the basic wipe waveform from the basic wipe waveform generating section 1 is expanded as shown in figure (a), the output of the mixer section 3 is written in the memory section 2 when the picture reaches an object size, the size of the wipe waveform is minimized and the basic wipe waveform moved for its position is expanded up to the object size as shown in figure (b). When the picture reaches an object size, the output of the mixer section 3 is again written in the memory section 2 and the processings above are repeated as shown in figure (c) to obtain the random multiple wipe effect as the wipe waveform at an output terminal 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wipe key signal generation circuit for obtaining a deposition wipe effect, which is used in television program production equipment and the like.

Accordingly, prior art FIG. 2 is an example of a deposition wipe. In Figure 2, the strip-shaped wipe signal shown in A moves from top to bottom a), the lower edge of the strip-shaped strip in A moves to the bottom edge of the screen, and then (: Separately, the strip-shaped wipe signal at the mouth moves from the top of the screen to 21. -7 To move downward b), the bottom edge of the band-shaped wipe signal at the mouth moves to the top edge of A, and further move the band-shaped wipe signal C downward from the top edge of the screen (e). A (stacked) wipe effect is obtained. Conventionally, there has been a method of using a micro CPU to obtain this effect. The micro CPU calculated the positions of A and A in Figure 2 to obtain the wipe waveform. Here, in order for the band-shaped wipe signal to move smoothly from top to bottom, it is necessary to finish the calculation that has moved every vertical cycle. If the calculation is not finished every vertical cycle, multiple Since the field screens are the same, movement will no longer be smooth.

Since the wipe waveform composed of straight lines as shown in FIG. 2 is easy to calculate, the calculation can be completed every vertical phase.

Problems to be Solved by the Invention However, the circular stack-like wipe shown in Figure 3 requires complicated calculations, and the stack-like wipe effect cannot be obtained unless a CPU capable of high-speed calculations is used. There was a problem.

3...-7 The object of the present invention is to eliminate the drawbacks of the above-mentioned examples and to provide a wipe key signal generation circuit that can realize a stacked wipe of a complicated waveform without using a high-speed calculation CPU. .

Means for Solving the Problems In order to achieve the above object, the present invention includes a basic wipe waveform generating section that generates basic wipe waveforms such as band-shaped, circular, and rhombic shapes, and a memory section that temporarily stores and reproduces the basic wipe waveforms. and,
It includes a mixing section that mixes the basic wipe waveform from the basic wipe waveform generating section and the reproduced signal from the memory section, and outputs the mixed signal from the mixing section as a wipe waveform, and at the same time feeds back to the input of the memory section. This is how it was done.

Function The present invention can obtain the following effects with the above configuration. That is, a basic wipe waveform whose position and size are controlled is generated by the basic wipe waveform generation section, and the basic wipe waveform whose position and size are set to the first target is stored in the memory section. Next, at the same time as this is reproduced and output, a new basic wipe waveform is generated and combined with the memory reacquisition signal, and when the basic wipe waveform reaches a second target position and size different from the above, the wipe waveform is synthesized again. is stored in Memo 9. In this way, if you memorize the wipe waveforms that are synthesized by changing the basic wipe waveform one after another to a new target position and size, and fill the entire screen, you can create a stacked wipe effect or a random multi-shaped wipe effect. You can get a wipe effect.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 1 is a basic wipe waveform generator that generates a basic wipe waveform, 2 is a memory unit that temporarily stores and reproduces the wipe waveform, and 3 is a basic wipe waveform from the basic wipe waveform generator 1 and a memory unit. The mixer 3 generates a wipe waveform and returns it to the memo 9 section 2. 4 is a wipe waveform output terminal from the mixing section 3;

51... Next, the operation of the above embodiment will be explained. In the above embodiment, in order to obtain the stacked wipe effect shown in FIG.
First, the memory unit 2 is set to a no-signal state, and the band-shaped basic wipe waveform from the basic wipe waveform generating unit 1 is generated as shown in FIG. 2(a).
Move from outside the screen as shown in , and move the bottom edge of the strip in A to the bottom edge of the screen. Therefore, the wipe waveform output from the mixing section 3 is written and stored in the memory section 2, and the reproduction signal from the memory section 2 continues to reproduce this wipe waveform until the next writing is performed. After the basic wipe waveform generation unit 1 finishes writing to the memory unit 2, it moves the basic wipe waveform from outside the screen again as shown at the mouth in Figure 2(b), and reaches the bottom edge of the mouth and the upper edge of A. move it. When the movement is completed, the wipe waveform of the output of the mixing section 3 at that time is written and stored in the memory section 2. When the writing is completed, the basic wipe waveform generator 1 moves the basic wipe waveform from outside the screen as shown in C of FIG. 2(c). By repeating this process of moving the basic wipe waveform from outside the screen and writing the output of the mixing section 36'\-/' to the memory section 2 when it has been moved to the desired position,
A deposited wipe effect is obtained at the output terminal 4. Similarly, the circular deposition wipe effect shown in FIG. 3 can also be obtained.

In addition, in this configuration, in order to obtain a random multi-wipe effect as shown in FIG. Enlarged as shown in figure (a),
When the desired size is reached, the output of the mixing section 3 is written to the memory section 2, and then the size of the wipe waveform is minimized and the basic wipe waveform whose position is moved is as shown in Fig. 4 (b). Expand it to the desired size. When the desired size is reached, the output of the mixing section 3 is written to the memory section 2 again and this process is repeated as shown in Fig. 4(c), so that the wipe waveform of the output terminal 4 has a random multi-wipe effect. can get.

Effects of the Invention As is clear from the above embodiments, the present invention can generate basic wipe waveforms without requiring a high-speed calculation CPU by combining the basic wipe waveform generating section, mixing section, and memory section. Even with complex waveforms such as star shapes, it is possible to obtain a stacked wipe effect or a random multi-wipe effect.

Similarly, an effect waveform can be obtained for a so-called soft edge wipe in which the edge of the wipe waveform is smooth.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a wipe key signal generation circuit according to an embodiment of the present invention, FIG. 2 is a waveform diagram for explaining the operation of a conventional example and an embodiment of the present invention in band-shaped deposition wipe, and FIG. 3 is a similar waveform diagram. FIG. 4 is a waveform diagram for explaining a conventional example of a circular deposition wipe and a detailed explanation of the present invention. FIG. 4 is a waveform diagram for explaining a circular random multi-wipe effect according to the present invention. 1... Basic wipe waveform generation section, 2... Memory section, 3
...Mixing section, 4...Output terminal. Name of agent: Patent attorney Toshio Nakao (No. 4)
figure

Claims (1)

[Claims] A basic wipe waveform generation section that generates a basic wipe waveform, a memory section that temporarily stores and reproduces the output wipe waveform, and mixes the basic wipe waveform from the basic wipe waveform generation section and the reproduction signal from the memory section. A wipe key signal generation circuit comprising: a mixing section; the wipe key signal generating circuit includes a mixing section, and feeds back and inputs an output wipe waveform from the mixing section to the memory section.