JPH0414084A - Audio signal generating device - Google Patents

Abstract

PURPOSE:To make image formation joyful by providing a comparing means which compares can input for image input with the video signal from a delay means delaying the above input for image display by one image plane and varying an audio signal for sound generation according to the variation quantity, position shift, and color change of an image. CONSTITUTION:When the audio signal generating device 1 is supplied with the video signal, field by field, form a image generating device 14, the video signal is converted into a digital signal, which is supplied to an image memory 3 and a comparing circuit 4. The circuit 4 compares the signal with the video signal form the memory 3 which is delayed by one field and the comparison output is integrated by an integration circuit 8 to detect the variation quantity of the image, i.e. plotting speed; and the detection result is inputted to a sound source data memory 10 through a time filter 9 and a bus line 6 and a CPU 5 reads audio data corresponding to the speed out of a sound source 11 and outputs it through an output terminal 12. The image data is passed through an image memory 7 and a terminal 13 and displayed on a display means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio signal generation device suitable for use in, for example, an image creation device used for children's drawing games.

[Summary of the invention]

In the present invention, the video signal for displaying the drawn image is delayed by one screen by the delay means, and the comparison means
By comparing the input video signal and the video signal from the delay means, and generating an audio signal from the sound source means in accordance with the output timing of the comparison output from the comparison means, and by using the position detection means to compare the above By detecting the position of the video signal on the screen according to the output from the means and controlling the sound source means B according to the detected output, the color of the changing part between each screen is detected by the comparing means. By doing so, the audio signal generated can be changed according to the various conditions described above, so that the audio signal generation device can create an image with auditory pleasure.

[Conventional technology]

2. Description of the Related Art In recent years, image creation devices have been known that can display images drawn on a so-called tablet (drawing surface) on a display screen such as a monitor screen for emotional education of children.

As such an image creating device, one shown in FIG. 9 is known.

In FIG. 9, the image forming apparatus has a main body formed from an upper case 49 and a lower case (not shown).

This upper case 49 includes a switch 50. clear key 51
．． Execution keys 53a are provided at both ends of the sound emitting section 525.

53b, and a tablet 54 as a coordinate input surface of a rectangular pressure-sensitive position detection device is provided in the center.

On this tablet, for example, the attached pen 5 such as Plus Sentsuku etc.
5 lightly against the tablet 54 and draw a trajectory, a pen-shaped cursor will be displayed on a monitor such as a TV (not shown).
This cursor moves in conjunction with the trajectory of the fingertip, etc., and the trajectory is displayed as an image. In this case, tablet 5
Since execution keys 53a and 53b are provided on both sides of the screen, even left-handed children can easily operate the device. Also, when the clear key 51 is operated, the tablet 5
4. All the images drawn above are erased and the screen remains in drawing mode, waiting for input.

The coordinate input surface of the tablet 54 is divided into a drawing area 54a and a menu selection area 54c.
The shaded area in 4a is the drawing area 54b.

The aspect ratio of this drawing area 54b matches the aspect ratio (3:4) of the west side of a normal monitor, and also the resolution of the input coordinates of this tablet 54 in the vertical direction (Y direction) and in the horizontal direction (X direction). The vixel ratio, which is the ratio of the resolution in the direction (direction), is matched to the pixel ratio of a normal monitor. Therefore, when an accurate circular locus is drawn in the drawing area 54b, an accurate circular image is also displayed on the monitor screen.

The menu selection area 54c of the tablet is further divided into a tool selection area 57 and a color selection area 58.

The color selection area 58 is provided with 12 round holes 59 for specifying different colors, and the attached pen 55
For example, a color (black/blue/green/yellow/red/white, etc.) can be specified by punching a circular hole 59 for specifying a desired color.

In addition, the tool selection area 58 includes six elongated holes 60 to 60.
65 are provided, and these are thick lines, thin lines, and
Brush 2 Contains an eraser, stamp, and cancel key. The user can select a desired mode by hitting a desired key with the attached pen 55.

[Problems to be Solved by the Invention] However, since the above-mentioned conventional image creation device is required to be connected to a monitor such as a TV, it is simple and lacks functions such as storing the screen and re-reading the two combinations. ing. Therefore, it is being considered to connect this image creation device to a computer and perform A-D (analog-to-digital) conversion on the computer side, and then process, store, and create an animation of the data. Since the system uses only video signals, it is not possible to generate an audio signal corresponding to the function, which reduces the enjoyment of image creation by half.

The present invention has been made in view of the above-mentioned problems, and is a computer connected to the above-mentioned image creation device, and an audio signal generation device that is capable of emitting various sounds according to the image drawn. For the purpose of providing.

[Means to solve the problem]

The audio signal generating device according to the present invention receives a video signal for displaying a drawn image, a delay means for delaying the video signal by 1WM screen, and a video signal from the input video signal and the delay means. and sound source means for generating an audio signal according to the output from the comparison means, and according to the output timing of the comparison output from the comparison means. The method further comprises a position detecting means for detecting the position of the video signal on the screen, and controlling the sound source means according to the detection output, and the comparing means detects the color of the changing part between each screen. The above-mentioned problem is solved by detecting.

[Effect]

The audio signal generation device according to the present invention compares a video signal for displaying an image drawn by the comparison means with a video signal delayed by one screen, and generates an audio signal according to the comparison output. By doing this, it is possible to generate sounds according to the changes in the image when it is drawn, and the position detection means can detect the position of the video signal on the screen according to the output timing of the comparison output from the comparison means. By detecting this and controlling the sound source means according to this detection output, it is possible to generate an audio signal corresponding to the change point (drawn position) of the image. By detecting the color of the changing portion of the image, it is possible to generate an audio signal that corresponds to the color of the drawn image.

〔Example〕

Embodiments of the audio signal generation device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a first example of an audio signal generation device according to the present invention.
FIG. 2 is a block diagram of an embodiment of the invention.

In FIG. 1, the audio signal generating device 1 is supplied with, for example, a video signal for each field from an image creating device 14, the configuration of which will be explained later.

This video signal is supplied to the AD conversion circuit 2.

The A-D conversion circuit 2 converts the supplied video signal for each field from an analog signal to a digital signal,
This digital signal is supplied to the image memory 3 and comparison circuit 4.

A so-called field memory is used as the image memory 3, and the video signal read from the image memory 3 is directly supplied to the comparison circuit 4 without going through the image memory 3. The signal is delayed by, for example, one field and then supplied to the comparator circuit 4.

The comparison circuit 4 compares the supplied video signal of the current field with the video signal of the field immediately before the current field, and supplies the comparison output to the integration circuit 8.

The integration circuit 8 performs intra-field integration processing on the comparison output and supplies it to the time filter 9 .

That is, by performing the above comparison, changes between the previous screen (previous field) and the current screen (current field),
In other words, changes in the drawn image can be detected, and by integrating this comparison output within the field,
The amount of change within the l field, ie the speed at which the image is drawn, can be detected.

The time filter 9 is, for example, a low-pass filter, and is intended to have inertia with respect to time.

The output from this temporal filter 9 is supplied to a sound source data memory 10 via a pass line 6.

The sound source data memory 10 stores the output from the temporal filter 9 as sound source data, the stored sound source data is read out by the CPU 5, and audio data corresponding to this sound source data is read out from the sound source 11 and output. It is output via terminal 12. In other words, audio data can be generated according to the speed at which the image is drawn.

Note that the video signal stored in the image memory 7 is
5 and taken out as image data via the output terminal 13, and supplied to display means such as a monitor display device for display.

The image creation device 14, which is connected to such an audio signal generation device and supplies the video signal, detects an image drawn on the human-powered tablet 34 by using, for example, the pressure of a pen provided (a so-called pressure-sensitive type). , this detection signal is C
It is supplied to PU35.

The CPU 35 supplies image data to the image memory 36 in accordance with the supplied detection signal.

The image memory 36 can store image data for at least one field, and the image data stored in the image memory 36 is read out by the CPU 35 and supplied to the video circuit 37.

The video circuit 37 converts the supplied image data into a video signal and converts the supplied image data into the A-D in the audio signal generation device 1.
Supplied to the conversion circuit 2.

As is clear from the above description, the audio signal generating device according to the first embodiment of the present invention detects the difference between the video signal of the current field and the video signal of the previous field, and uses this difference output within the field. By performing integral processing and controlling the audio signal to be generated according to the integral output, it is possible to control the audio signal to be generated according to the speed at which the image is drawn, and it is possible to enjoy image creation.

Here, for example, the image forming apparatus shown in FIGS.
), for example, when the number "3" is drawn at a constant speed, the graph of the intra-field integrated value over a plurality of fields is as shown in FIG.

When the integral output as shown in FIG. 3 is differentiated, a graph showing the speed (-constant) of drawing the above-mentioned image is obtained as shown in FIG. 4. In this way, when the drawing speed is constant, the audio signal produced by the sound source 11 has, for example, a constant level.

Since the differential output changes in accordance with the drawing speed of the image as shown in FIG. 5, the audio signal emitted from the sound 'a11 also changes and is emitted in accordance with the drawing speed, for example.

As a result, for example, when the absolute value of the above differential value is large, a large audio signal is generated because the desired part of the image is often filled in, and when the absolute value is small but there are many changes, a large audio signal is generated. , so the pitch of the voice pronounced is also changed according to the change in small but strong sound, and conversely, the above change is a negative (-) sound.
Since this is the eraser mode, it is possible to make an audio signal such as ``° scrub'' sound, for example.

Next, a second embodiment will be explained.

In the second embodiment, the position where the image is drawn is detected, and the audio signal emitted from the sound source is controlled according to the detected position.

FIG. 6 shows a detailed diagram of the audio signal generating apparatus of this second embodiment.

First, the video signal supplied from the image creation device 1 as described above is sent to the synchronization signal separation circuit 20 via the input terminal 38.
and is supplied to the A-D conversion circuit 2.

The A-D conversion circuit 2 converts the supplied video signal into a digital signal and supplies it to the image memory 3 and the comparison circuit 4.

As described above, the comparison circuit 4 compares the video signal of the current field with the video signal of one field before, and sends the comparison output to the first counter 21 and the second counter 2.
Supply to 2. This comparison output compares the video signal of the current field and the video signal of the previous field, so if these are compared and there is a difference, the comparison output will be output. It has become.

On the other hand, the synchronization signal separation circuit 20 separates an H (horizontal) synchronization signal and a (vertical) synchronization signal from the supplied video signal and sends them to a tenth counter 21 and a second counter 22, respectively. Supplied as a pulse.

The first counter 21 counts the period from when the H synchronization signal is supplied (after being reset) until the next H synchronization signal is supplied, using pulses finer than the H synchronization signal, The horizontal position is determined as a count value, and this is supplied to the position detection circuit 23.

The second counter 22 counts the number of pulses of the supplied H synchronization signal from the time the supplied ■ synchronization signal is supplied (after being reset) until the next ■ synchronization signal is supplied. Then, the number of lines as the vertical position is determined and supplied to the position detection circuit 23.

The position detection circuit 23 learns the position where the image is drawn from each of the supplied count values, and supplies the sound source 11 with a position detection signal corresponding to this position.

That is, only when there is a change in the drawn image, which is when the video signal of the current field and the video signal of one field before, the first counter 21 and the second counter 22 are Since the comparison output is supplied, the position of the comparison output (where the image is drawn) can be known by the first counter 21, the second counter 22, and the position detection circuit 23.

The sound source 11 generates an audio signal according to this position detection signal.

Note that the same parts as in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted.

As is clear from the above description, the audio signal generation device according to the second embodiment separates the H synchronization signal and the V synchronization signal from the supplied video signal, and separates the H synchronization signal and the As a reset pulse, the difference between the video signal of the previous field and the video signal of the current field is supplied to the first and second counters, and the difference output is obtained by the first and second counters. By detecting the horizontal position and vertical position, detecting the position where the differential output is obtained based on these, and changing the audio signal emitted from the sound source based on this detected position, you can enjoy creating images. can be created.

Next, a third embodiment will be explained.

In this third embodiment, the sound source is controlled according to the color of the changing part of the image.

FIG. 7 is a block diagram of the audio signal generating device of this third embodiment.

As described above, the video signal supplied from the image creation device 1 is supplied to the A-D conversion circuit 2 and the synchronization signal separation circuit 31 via the input terminal 39.

The synchronization signal separation circuit 31 separates a vertical synchronization signal from the supplied video signal and supplies it to the intra-field integration circuit 28 as a reset pulse.

The A-D conversion circuit 2 converts the supplied video signal from an analog signal to a digital signal, and supplies this to the image memory 3.

The image memory 3 receives the supplied video signal as described above.
The signal is delayed by one field and then supplied to the comparator circuit 27.

As described above, the comparison circuit 27 is supplied with the video signal of one field before and the video signal of the current field, compares them, and supplies a comparison output to the color separation circuit 32.

The color separation H division 32 separates color data from the supplied video signal and supplies it to the intra-field integration circuit 28 .

The intra-field integration circuit 28 performs intra-field integration of the comparison output for each of the supplied vertical synchronization signals, and uses this integrated output as the sound a11. The signal is supplied to the memory 29 and the comparison circuit 30.

The sound source 11 generates an audio signal according to the integrated output from the intra-field integration circuit 28.

That is, the color data of the changing portion of the image detected by the comparison circuit 27 is detected by the color separation circuit 32, and this color data is subjected to intra-field integration processing to generate an audio signal corresponding to the color of the image (detected color data). can be pronounced from the sound: all.

On the other hand, the memory 29 delays the supplied integrated output by one field and supplies it to the comparator circuit 3o.

The comparison circuit 30 compares the directly supplied integral output of the current field with the integral output of one field before, and supplies this comparison output to the sound source 11. This comparison output is output when a change occurs in the color of the image.

This comparison output is supplied to the sound source 11 as a trigger.

The sound source 11 normally generates an audio signal from the speaker 33 according to the integrated output of color data as described above, but when the comparison output from the comparison circuit 30 is supplied as a trigger, Pronounce an audio signal that is different from the one you were using.

Specifically, for example, if the color detected during normal times is “red”
In the case of "blue", an audio signal that looks warm is produced, and in the case of "blue", an audio signal that seems cold is produced, and so on. When a comparison output is provided, ie if the color of the image changes, a different audio signal is pronounced, for example the name of the color itself is pronounced in a human voice. Note that this is just an example.

In this third embodiment, for the detection of the color data, the main part shown in the seventh section may be configured as shown in FIG. 8, for example.

That is, by being supplied to the image memory 3, 1
The color data of the video signal delayed by one field is detected by the color separation circuit 26, and the color data of the video signal of the current field which is not passed through the image memory 3 is detected by the color separation circuit 25. The same effect as described above can be obtained by detecting each color data by the comparison circuit 27 and supplying it to the intra-field integration circuit 28.

Furthermore, instead of separating the color data from the video signal after passing through the comparison circuit 32 as shown in FIG.
-The color data may be separated after passing through the D conversion 2.

As is clear from the above description, the audio signal generation device of the third embodiment detects a changing part of an image and generates an audio signal according to the intra-field integral output of color data of this part. By doing this, it is possible to generate an audio signal that corresponds to the color of the image.Also, by detecting a change in the integral output within the field and generating an audio signal according to this detection output, it is possible to detect the change in color. Since it is possible to produce audio signals according to
You can enjoy creating images.

In the above embodiment, the video signal is supplied from a pressure-type image creation device, but this is not limited to a pressure-type image creation device, and any device that outputs a drawn image as a video signal may be used. Of course it's a good thing.

You can enjoy creating images by changing the audio signal that is produced.

〔Effect of the invention〕

Comparison of a delay means to which a video signal for displaying a drawn image according to the present invention is input and which delays the video signal by one screen, and a comparison between the input video signal and the video signal from the delay means. and a sound source means that generates an audio signal in accordance with the output from the comparison means, it is possible to change the audio signal that is emitted in accordance with changes in the image such as when drawing, Further, by controlling the sound source means according to the detection output of the position detection means for detecting the position of the change point on the screen of the video signal according to the output timing of the comparison output from the comparison means, the image is drawn. The audio signal that is emitted can be changed depending on the position of the image, and the comparing means can also detect the color of the changing part between each screen, thereby changing the audio signal according to the color of the image.

[Brief explanation of drawings]

FIG. 1 shows a first example of an audio signal generation device according to the present invention.
Figure 2 is a schematic diagram showing a specific example of drawing, Figure 3 is a graph showing the characteristics of an integrally processed video signal, and Figures 4 and 5 are a diagram showing the differentiation of an integrally processed video signal. Graphs showing processed characteristics, FIG. 6 is a block diagram of the audio signal generation device of the second embodiment, FIG. 7 is a block diagram of the audio signal generation device of the third embodiment, and FIG. 8 is a block diagram of the audio signal generation device of the third embodiment. FIG. 7 is a block diagram of another specific example of the main part of the embodiment. FIG. 9 is a plan view showing an example of an image creation device. 2...A-D conversion circuit 3...
・・・・・・・・・Image memory 4・・・・・・・・・・・・
・Comparison circuit 5・・・・・・・・・CPU 6・・・・・・・・・Has line 7・・・・・・
...... Image memory 8 ...... Integrating circuit 9 ...... Time filter IO ...
......Audio data memory 11...
...Sound source 20...Synchronization signal separation circuit 21.
......First counter 22...
......20th counter 23...
...Position detection circuit 25.26...Color separation circuit 27.30...Comparison circuit 28...
......In-field integration circuit 29...
......Memory 31......Synchronization signal separation circuit 32.
......Color separation circuit 33...
・・・・・・Speaker 34・・・・・・・・・Input tablet 35・・・・・・・・・CPU

Claims (3)

[Claims] (1) A delay means that receives a video signal for displaying a drawn image and delays the video signal by one screen, and a comparison means that compares the input video signal with the video signal from the delay means. and sound source means for generating an audio signal in response to the output from the comparison means. (2) It has a position detection means for detecting the position of the video signal on the screen according to the output timing of the comparison output from the comparison means, and controls the sound source means according to the detection output. The audio signal generation device according to claim (1). (3) The audio signal generating device according to claim 1, wherein the comparing means detects a color of a changing portion between each screen.