JPS6013358B2 - television signal generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a television signal generator that generates television signals for forming television images, and is based on pattern signals of characters, symbols, human images, etc. in the television image. Therefore, it is most suitable for use in a television signal generator that generates pattern signals such as contoured pattern signals, edged pattern signals, hollow pattern signals, and the like.

Television communication systems are effective as a means of visual communication, but for this purpose, information represented by letters, numbers, symbols, etc. must be clearly conveyed to viewers.

However, when these patterns of letters, numbers, pronunciations, etc. are displayed on a television screen, an image with good contrast is not always produced compared to the background. For this reason, if the brightness of the screen changes from moment to moment, it becomes necessary to adjust the brightness, color tone, and position of characters on the screen accordingly, but this requires extremely complicated operations and requires manual intervention. It is difficult to control the As an effective solution to the above problem, the characters that should be displayed,
Consideration has been given to displaying numbers with good contrast by adding outlines or shading to them. Conventionally, the above-mentioned methods for adding outlines or shading to patterns include adding outlines or shading to handwritten characters and photographing them with a TV camera, or double-capturing the characters to be displayed with two TV cameras. A method has been used in which the phases of the two are shifted to create a composite screen with mutually different brightness/tone. However, the handwriting method requires a lot of time and effort, and the method using double shots with a TV camera can only produce shadows in one direction, which is insufficient for the outline of the characters. It was something. Further, in the above method, a character signal generator that electrically generates a character signal, etc.
When displaying necessary information using a pattern signal generator or the like, it is difficult to add outlines or shading to the displayed characters. A so-called green superimpose device that adds greenery (contours) and shading to pattern images has already been developed (Broadcasting Technology Vol. 27, No. 4, 197
4).

According to this device, clear superimposed characters with borders and shading are displayed on the screen, but the shapes of the borders etc. that can be obtained are limited, and "the characters and figures and the background of the screen on which they are displayed are There was a problem in that it was not possible to obtain borders and shading of arbitrary shapes.The present invention was invented in view of the above-mentioned problems. To obtain a patterned or bordered pattern television signal with a relatively simple operation.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block circuit diagram showing the entirety of a television signal generator according to the present invention. Switch circuit 4, effect amplifier 6
``It consists of a waveform shaping circuit, eight selection gate circuits, and so on.

The television signal generator shown in FIG.
A pattern signal is supplied to the vertical delay circuit 1 via the waveform shaping circuit 7. This pattern signal may be a monochrome pattern image of letters, numbers, symbols, human images, etc. taken with a television camera, or a pattern signal generator that electrically generates pattern images of letters, numbers, symbols, etc. It may be a pattern signal obtained. Such a pattern signal generator is used as a signal source for, for example, a telop, a time display, a test pattern for adjusting a receiver, or other data display devices. As shown in FIG. 2, the vertical delay circuit 1 is composed of 24 vertical delay circuits Y+, . to Y-, 2 connected in series. 2 is 25 individual horizontal delay circuits
It is composed of +, 2 to X-, 2. The vertical delay circuit 1 is for sequentially delaying the source pattern signal supplied thereto in the vertical direction of the television screen to form pattern signals on each of a plurality of scanning lines. The horizontal delay circuit 2 is for delaying each of the vertically delayed signals described above in the horizontal direction of the television screen. The output signal of the waveform shaping circuit 7 is supplied to the vertical delay circuit Y0,o and also to the horizontal delay circuit X+2.

Further, the vertical delay circuits Y0, . . . are connected in series and constitute the vertical delay circuit 1. The individual output signals of ~Y-, 2 are output from the respective horizontal delay circuits X1, . ~X-, 2, respectively. Each of these horizontal delay circuits X+, 2 to X-, 2 consists of 24 delay circuits x-, . ~
It consists of x ground. Therefore, 62 pattern signals including pattern signals delayed only in the vertical direction are formed. Horizontal delay circuit X10 of horizontal direction delay circuit 2, 2 to X
-, 2 are configured by series delay circuits x-, . ~x
Each output signal of the river is supplied to a selection gate circuit 9.

This selection gate circuit 9 selects an appropriate one from a plurality of pattern signals obtained by delaying in the vertical and horizontal directions based on the selection signal from the switch circuit 4, This is a circuit for forming a pattern signal of a common part (logical product) of .The pattern signal representing such a logical part is hereinafter referred to as a product pattern signal.The output signal of the selection gate circuit 9 is an effect signal.

An example amplifier is supplied. On the other hand, as shown in FIG. 1, the original pattern signal is supplied to the diagonal delay circuit 3.

The diagonal delay circuit 3 is for delaying the original pattern signal by a predetermined interval in the diagonal direction of the television screen and moving the original pattern signal to the center of the 629-square pattern area formed as described above. It is. Diagonal delay circuit 3
The output signal of the effect is as well. It is supplied to amplifier 6. The effect G amplifier 6 subtracts the product pattern signal from the delayed source pattern signal or the source pattern signal itself to form a contour signal representing the inner contour portion of the original pattern image, and further uses this contour signal to It is used to add arbitrary colors to the contours created and the pattern image created by the product pattern signal, respectively, and to synthesize these signals with a video signal.The video signal is, for example, a television The signal may be a signal for forming a television image such as a landscape or a person image taken by a camera, or it may be a plain background signal.FIG. 2 shows the vertical delay circuit of FIG. 1, and a horizontal delay circuit X that constitutes the horizontal delay circuit 2.
+, 2 to X-, one of 2 X 10,.

and series delay circuits x-, . FIG. 9 is a detailed circuit diagram for explaining a portion 91 of the selection gate circuit 9 corresponding to each of the female to x females. FIG. 3 is for explaining FIG. 2, and shows a television screen on which a pattern signal obtained by the television signal generator shown in FIG. 1 is formed. The 24 vertical delay circuits Y-Y-, 2 connected in series in the vertical delay circuit Y-, 2 are connected in the arrangement shown in FIG. Each vertical delay circuit is for delaying an input signal (original pattern signal) by a time (IH) corresponding to one scanning line, and is composed of, for example, a shift register or a delay line. Therefore, these vertical delay circuits Y+, . The output signals of ~Y-, 2 become pattern signals that ride on a total of 25 scanning lines, including the original pattern signal before being delayed. In other words, ``In FIG. 3, the original pattern signal is the signal appearing on the scanning line L1,2 shown at the top.

The output signal of the next vertical delay circuit Y0,o is the scanning line L+,.
This is the signal that appears above. In this way, the following vertical delay circuits Y+8...Yo...Y-, 2 are connected to the solid scanning lines L18...L...L- in FIG. This becomes the pattern signal that appears on 2. Furthermore, in L television, "to eliminate flickering on the screen, scanning lines are scanned one after the other (interlaced scanning), so the vertical delay circuit Y river is approximately 25
A delay time equivalent to one day (250 spots to be exact) is given. In this way, the total distance from the source pattern signal to the output signal of the vertical delay circuit Y is 262. Since the delay amount is for one field, the vertical delay circuits Y+, . The output signal of 10. is interlaced scanned and the original pattern signal appears on the scanning line 10. 2 appears on the next scan line L river.
Therefore, the following vertical delay circuit Y+9...Y-,...Y-,
．． The output signal is the scanning line L+9 represented by the dotted line in FIG.
...L-. ...L-,. This becomes the pattern signal that appears above.

Note that a clock pulse synchronized with the horizontal synchronization signal is supplied to these vertical delay circuits Y-Y-, 2 from a clock pulse generator IQ, and the vertical delay circuits Y+, . ~Y
The shift registers constituting .-, 2 are designed to have a predetermined delay time (IH).

Waveform shaping circuit 7 and vertical delay circuit Y+, . The respective output signals of ~Y-, 2 are output from 24 horizontal delay circuits X+, 2~X-
, 2, respectively. In Fig. 2, "The horizontal delay circuit X connected to the output terminal of the vertical delay circuit Y+, o among these horizontal delay circuits
Only 10·o is shown, and the configurations of other horizontal delay circuits are omitted because they are the same. Each horizontal delay circuit X1,2 to X-,2 is composed of 24 delay circuits x-,. to x+,2 connected in series as described above.

These horizontal delay circuits X+. 2 to X-, 2 are given a delay amount T corresponding to the delay distance obtained by replacing the delay distance corresponding to 25 scanning lines in the horizontal direction of the television screen. That is, if the effective number of scanning lines is 493 and the effective scanning period is 53.3 peaks, then the horizontal delay amount T corresponding to the vertical shadow formed by 25 scanning lines is M=53. Volume 3x will be secretly published by my wife.

(amount; aspect ratio of a television screen). Divide this into two equal parts and create individual delay circuits x-, . If the delay time is divided into .about.x10,2, the delay amount t=81 ns. Therefore, these delay circuits x-, . ~x+,2 can be configured with delay lines whose delay times are in the order of 81, for example.The horizontally shaded area formed by these delay circuits x-,.~x+,2 is the third This is indicated by a vertical line in the figure.Therefore, by delaying the original pattern signal g in the vertical and horizontal directions, a 629-specific pattern signal is formed.

Note that some of these delayed pattern signals are shown in FIG. And vertical delay circuit Yi (i=
g(i, i
). The output terminal of the vertical delay circuit Y10, o is connected to one input terminal of the gate G-2 of the selection gate circuit 9.

Furthermore, 24 delay circuits x+, . Each output terminal of ~x-, 2 is similarly connected to another 24 gates G-, . - are respectively connected to one input terminal of GM. The other input terminals of these 23 gates G-, 2 to G-1, 2 are connected to individual selection switches of the selection switch circuit 4.
Therefore, by selecting these switches, the delay circuits x-, .
One or more of ˜xM can be arbitrarily selected. Note that the above 25 gates G-, 2 to G-1, 2 serve as oven collectors and are all output-coupled. Further, as shown in the figure, the outputs of the 625 gates, each of which has 23 output connections, are all connected in common. By this output combination (wired G-AND), a signal of the AND of 623 gates can be obtained. For convenience, the gate G- is represented by an AND symbol.
．． 2~C+, 2 is a so-called tri-state gate,
If the selection output from the selection switch circuit 4 is “i”,
Delay circuit x-, . When the delayed signal from ~x-,2 is “1”, a gate output of “1” is generated, and the delayed signal is “0”
When this happens, a gate output of “0” is generated. Selection output is “0”
'', the gates G-,2 to G1,2 are in a non-selected state, and their output terminals are at high impedance.
Therefore, the pattern signal obtained from the selection gate circuit 9 is
The thin pattern signal is a logical product of one or more signals selected from among 623 pattern signals obtained by delaying the original pattern signal in the vertical and horizontal directions. The selection switch circuit 4 in FIG. 1 and FIG.
It consists of a 62g solid on/off switch that corresponds to a solid gate.

FIG. 4 is a circuit diagram showing the year of the selection switch circuit in FIG.

As shown in FIG. 4, the selection switch circuit 4 includes 625 on/off switches SW(-, 2, ground), SW(-, ., ground)...SW(x, y),・・・・・・
- The movable terminals of SW...,, -, 2) and SW...2, -, 2) are commonly connected and selectively grounded via the changeover switch 11.

Further, the fixed terminals are gates G-, 2 to G of the selection gate circuit 9.
10, 2, and 623 are connected to one input terminal of the gate. These selection switches SW (-, 2, 10, 2) to SW (10, 2, -, 2) are normally closed and grounded, so the gates G-, 2 to G1, 2 receive a signal. “0” is supplied. Therefore any selection switch S
The horizontal delay circuits x-, . One or more of the ~x10,2 outputs can be selected.

FIG. 5 is a plan view of the operating panel a showing the arrangement of the 625 selection switches SW (-, 2, 10, 2) to SW (10, 2, -, 2).

On/off switches 39, such as toggle switches, are arranged in a matrix at grid points in the vertical and horizontal directions on the operation panel 4a, as shown by circles. Top row of operation panel 4a (112)
is the series delay circuit x that constitutes the horizontal delay circuit X+,2
-,． 25 selection switches SW corresponding to ~x10,2
(-, 2, 10, 2), SW (-, ., 10, 2)...
SW (10, 2, 10, 2).

Similarly, the second row (111) switch group of the 2nd hardwood switch corresponds to the horizontal delay circuit X river. Similarly, each horizontal row represents a horizontal delay circuit X+io...X-,2
It corresponds to Then, by using the selection switches of these 629 factors, 62 gates are selected to add an outline of an arbitrary size to the original pattern image. For example, by operating the pattern to form a square, circle, etc. pattern, it is possible to form contoured pattern images of various shapes.As described above, the diagonal delay circuit 3
This method obtains a center signal for forming an image in which the original pattern image is moved to the center of the delayed pattern area of the 62-needle box by delaying the signal g in the diagonal direction of the television screen. It has a delay time of 10 Q).

Here, Q is a delay time equivalent to the horizontal delay time of the groups in the vertical direction. In reality, since interlaced scanning is used, the vertical delay of the string is equivalent to IZ scanning lines, so if Q = 1, the delay is the same length in the vertical and horizontal directions. A region of pattern signals can be formed. Therefore, by the above calculation, Q=12=
The result is 81 nS×12 nims.

In other words, the diagonal delay circuit 3 is 63.5 fs (IH)
If it is configured with a delay layer having a delay amount of ×611 fs:382 fs, the original pattern image that has passed through the diagonal delay circuit 3 can be positioned at the center of the delayed pattern area. Note that the delayed signal g (0, 0) obtained from the horizontal delay circuit 2 shown in FIG. The first 12 delay circuits x-, . ,x-,.

. . . This is a signal that has passed through xo. This delayed signal g
(0,0) lags the original pattern signal supplied to the television signal generator by ten degrees (Q; IZ). That is, the delayed signal g(0,0) and the output signal of the diagonal delay circuit 3 described above are delayed by the same time and appear in the same phase on the television screen. In this case, the delayed signal g(0,0) is a signal obtained by passing the original pattern signal through the waveform shaping circuit 7 and delaying it in the vertical and horizontal directions. It also has a sharper waveform at the rising and falling edges.Therefore, the changeover switch 1 in Fig. 1
5 to the b side (delayed signal g(0,0) side) (soft → hard) to create the effect. The image of the outline of the pattern that is synthesized by amplifier 6 and appears on the screen is
This results in a clearer boundary line than when the switch 15 is turned to side a (toward the diagonal delay circuit 3 side). Next, Figure 6 shows the configuration of the effect amplifier 6 shown in Figure 6. It is a block circuit diagram showing an effect.

The amplifier 6 includes a differential amplifier 16 and a contour signal color adjustment circuit turtle 9.
~Pattern signal color adjustment circuit 20 "Background signal generation circuit 23, gain adjustment amplifier 22? 26, 27,
It is composed of a mixer 28 and the like. In FIG. 6, a plurality of pattern signals are formed by delaying the original pattern signal in the vertical and horizontal directions, and a plurality of pattern signals are formed by logically multiplying them. supplied to

On the other hand, the diagonally delayed original pattern signal i, which is the output signal of the diagonal delay circuit 3 in FIG. 1, or the delayed signal g ( 0
, 0) are supplied via the changeover switch 15. Therefore, the output signal of the differential amplifier 16 is the delayed original pattern signal i
Alternatively, a contour signal j representing only the contour portion obtained by subtracting the product pattern signal go from the delayed signal g(0,0) is obtained. The signal j obtained from the output terminal of the differential intensifier 16 is supplied to a contour signal color adjustment circuit 19. This contour signal color adjustment time 1 9
is composed of a shifter 19a for changing the phase shift of the subcarrier of 3.5 MHz, a balance modulator 19b, a brightness adjuster 19c, and a mixer 19d. The brightness level of the contour signal j supplied to the contour signal color adjustment circuit 19 is adjusted by a brightness adjuster 19c. At the same time, the contour signal i is applied to the balanced modulator 19M. In this balanced modulator 19b, the contour signal i is subjected to balanced modulation by the subcarrier whose phase has been changed in the phase shifter 19a. Therefore, in the contour signal color adjustment circuit 19, the tone of the contour is adjusted by adjusting the variable resistor VRa of the transfer device 19a, and the variable resistor VRa of the balance modulator 19b is adjusted.
By adjusting Rb and changing the level of the modulation signal, the intensity of the color of the contour can be changed, and by adjusting the variable resistor VRc of the brightness adjuster 19c, the brightness of the color of the contour can be changed. Note that these brightness adjusters 1
The output signals of 9c and balanced modulator 19b are combined in mixer 19d. Next, the product pattern signal signal supplied to the differential intensifier 16 is also supplied to the pattern signal color adjustment circuit 201 via the c terminal of the changeover switch 24.

, pattern signal color adjustment circuit 2, similar to the aforementioned contour signal color adjustment circuit 19, a phase shifter 20a, a brightness adjuster 20b,
It is composed of a balanced modulator 20c and a mixer 20d. Therefore, the pattern signal color adjustment circuit 201 can adjust the brightness, hue, and density of the delayed original pattern image. The video signal p supplied to the effect amplifier 6 is supplied to the gain adjustment intensifier 22 via the fixed terminal a of the changeover switch 21.

The changeover switch 21 switches between the video signal and the background signal (
This is used to switch between the signal and the plain signal. This background signal is supplied from the background signal generator 23 to the gain adjustment intensifier 22 via the fixed terminal b of the paddy fusuma switch 21. Background signal generator 23
has the same configuration as the contour signal color adjustment circuit 19 and pattern signal color adjustment circuit 20 described above, and includes a phase shifter 23a, a brightness adjuster 23b, a balance modulator 23c, and a mixer 23d. Therefore, the brightness, hue, and density of the background color of the plain television screen can be adjusted. The gain adjustment intensifier 22 has a control terminal 22a, to which a delayed original pattern signal i is supplied via a fixed terminal a of a changeover switch 24 and an inverter 25.

The output signal of the gain adjustment intensifier 22 is a signal obtained by extracting the signal (source pattern signal i) supplied to the control terminal 22a from the input signal, which is the video signal or background signal. The changeover switch 24 is used to display only the contour signal j on the screen, and when it is turned to the b contact side, the output signal (contour signal j) of the differential multiplier 16 is supplied via the inverter 25. Therefore, the output signal of the gain intensifier 22 is a signal obtained by extracting only the contour signal i from the video signal p or the background signal. Further, when the changeover switch 24 is turned to the b side, the fixed contact c is turned off and the product pattern signal is no longer supplied to the pattern signal color adjustment circuit 20. Therefore, only the outline or edge of the original pattern signal is displayed on the television screen. The output signals of the shadow signal color adjustment circuit 19 and the pattern signal color adjustment circuit 20 are supplied to gain adjustment intensifiers 26 and 27, respectively.

These gain adjustment intensifiers 26, 27 are, for example, mutually movable sliding variable resistors VR26 and VR2? Equipped with: By manually or automatically operating these variable resistors VR26 and VR27, the output signals of the gain adjustment multipliers 26 and 27 change continuously from high level to low level (zero level). . Therefore, by this operation, the contoured pattern image can be faded in or out on the television screen. The respective output signals of the gain adjustment multipliers 22, 26 and 27 are supplied to a mixer 28, where they are combined and output as a line output signal.

The line output signal is modulated by a video carrier wave and sent out as an L radio wave. Next, the operation of the television signal generator of the present invention will be explained with reference to FIGS. T, 8, and 9.

FIG. 7 shows the letter "A" with an inner outline, which is generated when the selection switch indicated by the black circle in FIG. 9 is turned off from among the selection switches of the operating panel 4a shown in FIG. 4. Note that FIG. 8 shows that the contoured pattern image shown in FIG.
FIG. 7 is a waveform chart showing waveforms of various parts to show the process generated by the television signal generator shown in FIGS.
The television image "A" formed by the source pattern signal g before being contoured is shown in dash-dotted lines in FIG.

The original pattern signal gi for forming the character A on the screen becomes signal g shown in FIG. 8 when arbitrary scanning lines L+ and 2 are taken out. This original pattern signal is waveform-shaped by the waveform shaping circuit 7 shown in FIG. 1 and sequentially delayed by IH (one scanning line) by the vertical delay circuit 1. The individual output signals of the series-connected vertical delay circuits Y-Y-, 2 forming the directional delay circuit 1 are the output signals of the individual horizontal delay circuits X+, 2-Y-, 2 forming the horizontal delay circuit 2.
Supplied to X- and 2, respectively. And this horizontal delay circuit
Ten. Series delay circuits x-, . The original pattern signal is sequentially delayed in the horizontal direction by the lines .about.x. As shown in FIG. 9, when the selection switch on the operation panel 4a is turned off, the outer 96 gj.・・・・・・g (10・2・o)
．．・…・g(112・-12)…. ...g (10, 2, 10, 2) is selected.

Next, in the selection gate circuit 9, a signal of the AND of these pattern signals is formed as described above.Therefore, the number of product pattern signals representing the shaded area in FIG. 7 is formed. To explain the two pattern signals g(., -, 2) and g(o, 1, 2) on the scanning line as shown in the figure, first, a pattern signal that is slightly delayed from the original pattern signal gi. g(o,-,2) is the vertical delay circuit Yo
(Figure 8). Furthermore, this signal is sent to the horizontal delay circuit X. Each delay circuit x-, . Since it is delayed in the horizontal direction by ~x0,2, the pattern signal g(o,10,2) delayed by 24t from the original pattern signal 9 is obtained from the output of the delay circuit x0,2 (Fig. 8). ). Then, as shown in FIG. 8, a signal go which is the logical product of these two pattern signals can be obtained from the selection gate circuit 9.
On the other hand, the source pattern signal is separately supplied to the diagonal delay circuit 3, and its output signal i is delayed from the original pattern signal by ten Q (Q=1) as shown in FIG.

Therefore, the image of the letter A, indicated by the dashed line in FIG. 7, is translated in the diagonal direction by a distance corresponding to the delay of dark blue in the vertical direction and 12 in the horizontal direction to the position indicated by the solid line in FIG. The product pattern signal go formed as described above,
The delayed original pattern signal i is supplied to the differential amplifier 16 of the effect amplifier 6.

The output signal i of the differential intensifier 16 is obtained by subtracting the product pattern signal movement from the source pattern signal i, as shown in FIG. 8, and is a contour signal i representing the contour portion of the pattern.
This contour signal i and the above-mentioned product pattern signal soft are separately divided into a contour signal color adjustment circuit 19 and a pattern signal color adjustment circuit 20.
where the brightness, hue and intensity of the color is adjusted. The color-adjusted contour signal i and product pattern signal go are sent to the mixer 2 through gain adjustment intensifiers 26 and 27, respectively.
8, it is combined with the video signal p or background signal. For example, if the subcarrier component and the video signal are omitted, this composite signal (line output signal k) is a contour signal that has a different color tone inside the pattern signal i, like the contoured pattern signal in FIG. It has a shape with j added. If this shaded pattern signal is displayed on a television screen, an image will be obtained in which an outline portion j is added inside the original letter A (solid line), as shown in FIG. By switching the switch 15 to the hard side, the delay signal g (0, 0) described above can be used instead of the pattern signal i. In this case, the outline of the contour part will look hard. Please note that the selection switch on the operation panel 4a is set to
If you select a narrower range than the case shown in the figure, the horizontal pattern signal movement part will be further enlarged, so
It can be made thinner than shown in the figure. Also, change the selection switch on the operation panel 4a to the center selection switch SW (0,
It is also possible to select a circle centered at 0). In this case, the product pattern signal becomes a substantially similar vertically reduced version of the original pattern signal. Furthermore, the effect shown in Figure 6
By turning the changeover switch 24 in the amplifier 6 to the b side, only the inner contour portion j can be displayed on the screen.

The present invention has been described above based on its preferred embodiments, but
The present invention is not limited to the above-described embodiments and can be modified in various ways.

For example, in the embodiment, the differential intensifier 16 is used to form the inner contour signal of the difference between the original pattern signal gi and the product pattern signal soft, but this may also be an exclusive OR circuit. can achieve the same purpose.

According to the present invention, as described above, a television signal with a hollow pattern or a shaded pattern can be obtained with a relatively simple operation.

In addition, the shape, interior, direction, etc. of outlines and shadows can be arbitrarily selected using selection switch means arranged in a matrix in a plane corresponding to the vertical and horizontal directions of the screen, and furthermore, the selection switch means can be operated. Since the signal almost corresponds to the shape, center, direction, etc. of the outline and shadow, it is possible to obtain a television signal generator that is easy to operate and easy to use.

[Brief explanation of drawings]

1 to 9 show an embodiment of a television signal generator according to the present invention, and FIG. 1 shows an overall block diagram of the television signal generator. 2 is a circuit diagram showing details of the vertical delay circuit and horizontal delay circuit shown in FIG. 1, and FIG. 3 is a circuit diagram for explaining FIG. 2. 4 is a circuit diagram showing details of the selection switch circuit shown in FIG. 1, and FIG. 5 is a selection switch circuit shown in FIG. 1. FIG. 6 is a detailed block diagram of the effect amplifier shown in FIG. 1, and FIG. 7 is a plan view showing the control panel of the television set shown in FIG. 8 is a waveform chart showing the waveforms of each part of the television signal generator shown in FIGS. 1, 2, and 6. FIG.
FIG. 6 is a plan view of the operating panel shown in FIG. 5 corresponding to the contoured pattern shown in the figure; In addition, in the symbols used in the drawings, 1 is a vertical delay circuit, 2 is a horizontal delay circuit, 3 is a diagonal delay circuit, 4 is a selection switch circuit, and 4a
is an operation panel, 6 is an effect amplifier, 9 is a selection gate circuit, 16 is a differential amplifier, and 39 is an on/off switch.
Y ten,. ~Y-, 2 is a vertical delay circuit, X+, 2~X'',
2 is a horizontal delay circuit, x-, . ~x1,2 is a delay circuit. Figure 1 Figure 2 Figure 3 Figure 5 Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] 1 The original pattern for drawing characters, figures, etc. on a television screen is delayed by multiple steps in the horizontal and vertical directions of the screen, and then n x m patterns are created, n in the vertical direction and m in the horizontal direction, slightly shifted from each other. a delay means for forming a delayed signal of n×m; a selection means for arbitrarily selecting a plurality of these n×m delayed signals; an AND means for logically multiplying the outputs of the selection means; means for deriving a central signal that is located approximately in the center of a screen area where the xm delayed signals are distributed and provides an image that is approximately the same shape as the original pattern signal; and a subtraction method that subtracts the output of the logical product means from the central signal. and a mixing means for adding the central signal and the output of the subtracting means in a state different from each other in at least one of hue, saturation, or brightness, and the selection means is arranged in a plane in a matrix. A television signal generator comprising n×m selection switch means.