JPH0732469B2 - Video camera equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a video camera device, and more specifically, a character generator to send to an image pickup screen based on a video signal obtained by an image pickup means such as an image pickup tube or a solid-state image pickup device. The present invention relates to a video camera device having a function of superimposing a character screen based on a character signal.

(Prior Art) When shooting with a video camera device, it is convenient to superimpose a character screen based on character data such as the shooting date and shooting time on the shooting screen for later playback or editing. is there. For this reason, there is provided a video camera device in which a character generator is provided in the main body. However, in this conventional synthesizing means, the character data can be entered only in a predetermined position in the screen, and the characters and the like on the character screen are moved from the right side of the screen to the left side or from the lower side to the upper side. To move, what is called scrolling,
Furthermore, it requires a very complicated circuit configuration, which is very expensive. Therefore, it is not used for general household use,
It was only used for very large-scale systems for commercial use such as broadcasting stations. In particular, a simple type video camera has not yet been concretely proposed, which allows the characters on the screen to be scrolled freely in the left / right direction, the up / down direction, or the diagonal direction in some cases.

(Purpose) The present invention has been made in view of the above points, and it is possible to freely scroll a selected character in the left / right or up / down direction or in an oblique direction as required. An object is to provide a simplified video camera device.

(Outline) In order to achieve the above object, the video camera device of the present invention is, firstly: an image pickup device (1) and: the image pickup device (1).
A video signal processing circuit (2) for adding a horizontal synchronizing signal and a vertical synchronizing signal generated in its own circuit to the output signal of the above and converting it into a video signal of a predetermined mode; A character selection signal input end for selecting a specific one, and a first control input end for receiving a first control signal (102) for defining the appearance timing of the selected character during horizontal scanning on the screen. (7
A), a second control input terminal (7B) for receiving a second control signal (202) for defining the appearance timing of the selected character during vertical scanning on the screen, and the selected character The first control signal and the second
A character generator (7) having an output terminal (7C) for outputting at a timing according to a control signal; activated in response to its own operation on the first operation means (55),
First control of the character generator (7) by forming the first control signal (102) in which the phase shifts with time based on the horizontal synchronizing signal generated by the video signal processing circuit. A horizontal read control circuit (5) supplied to the input end (7A); and a second operation means (65) of its own adapted to be operated independently of the first operation means (55). The second control signal (202) of which the phase shifts with time is generated based on the vertical synchronizing signal generated by the video signal processing circuit, and the second control signal (202) of the character generator (7) is generated. A vertical read control circuit (6) supplied to a control input terminal (7B) of 2; an output video signal of the video signal processing circuit (2) and an output from the output terminal (7C) of the character generator (7) Mixed with the signal And a mixing circuit (3) for obtaining a combined output, which is capable of individually activating the horizontal and vertical scrolling of the character on the monitor.

Secondly: an image pickup device (1); and a horizontal synchronizing signal and a vertical synchronizing signal supplied from the outside to the output signal of the image pickup device (1) to convert it into a video signal of a predetermined mode. A video signal processing circuit (2 ') for controlling the character selection signal input terminal for selecting a specific one of the characters owned by the video signal processing circuit, and the appearance timing of the selected character during horizontal scanning on the screen. A first control input terminal (7A) that receives a first control signal (103) for defining, and a second control signal (203) for defining the appearance timing of the selected character during vertical scanning on the screen. Second control input end (7B)
And a character generator (7) having an output terminal (7C) for outputting the selected character at a timing according to the first control signal and the second control signal.
And; activated in response to its own operation on the first operation means (59), forms a horizontal synchronization signal based on a signal from the reference signal generation source (10) and supplies the horizontal synchronization signal to the video signal processing circuit and the horizontal signal. The first control signal (103) is formed such that the relative position on the time axis shifts with respect to the synchronization signal with time, and is supplied to the first control input terminal (7A) of the character generator (7). The horizontal read-out control circuit (5 ') and the first operation means (59) are activated independently of the second operation means (69) and are activated in response to the reference signal. A second aspect in which a vertical synchronizing signal is formed based on a signal from a generation source (10) and is supplied to a video signal processing circuit, and the relative position on the time axis shifts with respect to the vertical synchronizing signal with time. A control signal (203) is formed to form the above-mentioned capacitor. A vertical read-out control circuit (6 ') supplied to a second control input terminal (7B) of the character generator (7); an output video signal of the video signal processing circuit (2') and the character generator (7). And a mixing circuit (3) for mixing the output signal from the output terminal (7C) to obtain a combined output, so that horizontal and vertical scrolling of the character on the monitor can be activated separately. It is characterized by having done.

(Example) Hereinafter, the Example of this invention is described using drawing.

First, a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, an output end of an image pickup device 1 such as an image pickup tube or a solid-state image pickup device is connected to an input end of a video signal processing circuit 2 that produces an NTSC video signal. The video signal processing circuit 2 is a well-known internal synchronization type circuit including a horizontal synchronization signal generation circuit and a vertical synchronization signal generation circuit, and an image based on the output signal of the image pickup device 1 from its output end. A television signal in which horizontal and vertical synchronizing signals and the like are added to the signal is output. This output end is connected to one input end of a 2-input type mixer 3, and the output end of the mixer 3 is connected to a video input end of a video recording device such as a video tape recorder (not shown). , And is connected to the composite output terminal 4.

The output terminal of the video processing circuit 2 to which the horizontal synchronizing signal 100 is sent is connected to the input terminal of a horizontal reading control circuit 5 which will be described in detail later, and the vertical synchronizing signal 200 of the video signal processing circuit 2 is sent. The output end is connected to the input end of a vertical direction read control circuit 6, which will be described in detail later. The input terminal of the horizontal direction read control circuit 5 has a sawtooth wave generation circuit 51.
The input terminal of the circuit 51 is connected to the comparison input terminal of the voltage comparator 52. An output signal of a Miller integrator circuit 53, which will be described in detail later, is input to the reference input end of the same voltage comparator 52 via an inverting circuit 54, and the trigger input end of the Miller integrator circuit 53 is for starting a horizontal scroll operation. It is grounded through the normally open switch 55 of.

The voltage comparator 52 outputs an H level output when the voltage at the comparison input terminal exceeds the voltage at the reference input terminal, and outputs L when the voltage at the comparison input terminal falls below the voltage at the reference input terminal.
It outputs the level output, and the same voltage comparator 52
When the input signal rises to H level, the output terminal of
The one-shot multivibrator circuit 56 that outputs a level pulse is connected to the input end of the circuit 56. The output end of the circuit 56, that is, the output end of the horizontal read control circuit 5 is the horizontal read of the character generator 7, which will be described in detail later. It is connected to the control input terminal 7A.

On the other hand, the vertical read control circuit 6 is also constructed in substantially the same manner as the horizontal read control circuit 5. That is,
The input end of the control circuit 6 is formed by the trigger input end of the sawtooth wave generating circuit 61, and the vertical synchronizing signal 200 is input. The output terminal of the circuit 61 is connected to the comparison input terminal of the voltage comparator 62. An output signal of a Miller integrator circuit 63, which will be described in detail later, is input to the reference input end of the voltage comparator 62 via an inverting rotation 64. It is grounded through a normally open switch 65 for starting the scroll operation.

The voltage comparator 62 outputs an H level output when the voltage at the comparison input end exceeds the voltage at the reference input end, and outputs L when the voltage at the comparison input end falls below the voltage at the reference input end.
The output terminal of the voltage comparator 62 is designed to output a level output, and the output terminal of the voltage comparator 62 of the one-shot multivibrator circuit 66 that outputs an H level pulse when the input signal rises to the H level. The output terminal of the circuit 66, that is, the output terminal of the vertical read control circuit 6 is connected to the input terminal, and is connected to the vertical read control input terminal 7B of the character generator 7. A keyboard 8 for setting characters and the like is connected to the character generator 7, and an output terminal of the character generator 7 is connected.
7C is connected to the second input end of the mixer 3.

The character generator 7 has a configuration as shown in detail in FIG. 2, and includes alphabetic characters A, B, C, ...
It has a ROM 71 in which character data such as numbers 1, 2, 3, ..., Symbols *, /, ... Is stored, and the vertical direction of the television screen is divided into, for example, 8 equal parts, and the horizontal direction RAM 72 having a total of 80 divided areas divided into 10 equal parts, a horizontal drive circuit 73 for reading the horizontal data of the character data stored in the RAM 72, and a vertical data read. And a vertical drive circuit 74 for the vertical drive circuit 74, and a conversion circuit 75 for converting the respective output signals of the circuits 73, 74 into appropriate signals to be sent to the second input terminal of the mixer 3. . This conversion circuit
The output end of 75 is connected to the output end 7C of the character generator 7. The memory contents in which the respective character data of the ROM 71 and the RAM 72 are stored are such that each of the 80 divided areas, and one divided area 72 'is, for example, a total of 35 bits as shown in FIG. I am trying to configure it. That is, one partition area 72 'is composed of a total of 35 bits, 5 bits in the horizontal direction and 7 bits in the vertical direction. If an example in which the alphabetic character "P" is stored in this is as shown in FIG. The presence or absence of dots in the bits can be handled.

As shown in detail in FIG. 4, the Miller integrating circuit 53 has a resistor R ₁ and a resistor R ₁ between the terminal + B to which a positive voltage is supplied and the ground terminal.
PNP type transistor Q ₁ emitter-collector and resistor R ₂
And a collector / emitter of the NPN transistor Q ₂ are connected in series, and the connection point between the resistor R ₂ and the collector of the transistor Q ₂ is connected to the input terminal of the inverting circuit 54. At the same time, it is grounded via an integrating capacitor C. A voltage divider circuit consisting of a series circuit of resistors R ₃ and R ₄ is connected between the terminal + B and the ground terminal, and the connection point of both resistors R ₃ and R ₄ is connected to the base of the transistor Q _1. ing. Further, the terminal + B is grounded through the resistor R ₅ and the normally open switch 55 for starting the scroll operation, and the connection point between the switch 55 and the resistor R ₅ is at the base of the transistor Q ₂ and the resistor R ₆ Connected through.

Further, the Miller integrating circuit 63 is also constructed in the same manner as the Miller integrating circuit 53.

Thus, the video camera device of the first embodiment of the present invention is configured. The operation will be described below.

The video electric signal based on the subject image, which is photoelectrically converted by the image pickup device 1, is output by the video processing circuit 2 to, for example, NTSC.
An appropriate television signal for the system is generated, and the generated signal is supplied to one input terminal of the mixer 3.

On the other hand, the horizontal synchronizing signal 100 from the video processing circuit 2 triggers the sawtooth wave generating circuit 51 to generate the sawtooth wave as shown in FIG.
Generate 101. The voltage of the sawtooth wave 101 is converted by the comparator 52 into the output voltage of the Miller integrating circuit 53 and the inverting circuit 54.
Is compared with the inverted voltage V (see FIG. 1). Now, when the switch 55 for starting the horizontal scroll is closed, the connection point of the resistors R ₅ and R ₆ is grounded, so that the transistor
Q ₂ is turned off, Miller integration into capacitor C
Start with the current value set by R _{1 to} R ₄ . The capacitor voltage at this time, that is, the Miller integrated voltage, is inverted by the inverting circuit 54, and the output of the inverting circuit 54 is output from the comparator 52.
It becomes the reference voltage V input to. The reference voltage V is below set to V ₀ at time T ₀ the switch 55 is closed, and stops when it reaches the voltage V ₁ ~V ₉ becomes a voltage V ₁₀ to drop gradually. Time from T ₀ to the reference voltage V ₀ is generated until a time T ₁₀ the voltage V ₁₀ occurs is set to several seconds.

Therefore, at time T ₀ , the output of the voltage comparator 52 is inverted to the H level, the H level signal triggers the one-shot multivibrator circuit 56, and the signal 102-0 of the horizontal read start signal 102 as shown in FIG. Occurs. Similarly, at the time points T _{1 to} T ₁₀ , the signals 102-1 to ₁₀
2-10 occurs. Such signals 102-0 to 102-10
Indicates that the phase of the horizontal synchronizing signal 100 is delayed and the delay amount is gradually increased.

When a desired character data, for example, a character ".OLYMPUS." As shown in FIG. 2 is selected by the keyboard 8, the character data stored in the ROM 71 is stored in the desired area of the RAM 72, for example. It is transferred to the area of the second row from the bottom.

The character data set in this way is read by inputting the horizontal read start signal 102 described above to the horizontal read control circuit 73. That is, in the signal 102-0 at the time point T ₀ , since the reading of the character data of the RAM 72 starts at the trailing edge of the horizontal synchronizing signal 100, the read data is all blank display as shown in FIG. 6 (A). Data. At time T ₁ , only the data “•” is read by the signal 102-1 and the display is as shown in FIG. 6 (B).
In the same manner, the reading start time is gradually advanced, the amount of data to be read is increased, and finally all the character data is read as shown in FIG. 6 (F). The character data read out in this manner is converted into an appropriate video signal by the conversion circuit 75, and the terminal 7C
Is supplied to the second input terminal of the mixer 3, superimposed on the television signal from the image pickup device 1 described above, and sent from the composite output terminal 4 to an external device (not shown) such as a VTR.

In this way, the horizontal scroll operation is performed.

Next, the operation in the case of performing the vertical scroll operation will be described. In this case, the television signal from the image pickup device 1 obtained in the same manner as above is output from the vertical direction reading circuit 6 to output the character generator 7
The output signals from are combined. That is, as shown in FIG. 7, the sawtooth wave generation circuit 6 is generated by the vertical synchronization signal 200.
1 is triggered to generate a sawtooth wave 201. This sawtooth 20
1 is compared with the reference voltage v which is the output of the inverting circuit 64 by the comparator 62. The reference voltage v decreases gradually in voltage v ₀ is time point t ₁ ~t ₇ at time t ₀ in the same manner as described above by closing switch 65 for opening vertical scrolling voltage v ₁ to v ₇ are Occurs, the voltage at time t ₈
Retained in v ₈ . Therefore, at the time t ₀ , the output of the voltage comparator 62 is inverted to the H level, the H level signal triggers the one-shot multivibrator circuit 66, and the vertical read start signal 202 is generated as shown by the signal 202-0. The following Similarly signal at time t ₁ ~t ₈ 202-
1 to 202-8 occur. Such signals 202-0 to 202
-8 is a signal in which the phase of the vertical synchronizing signal 200 is delayed, and the delay amount is gradually increased.

Then, the vertical read of the character data set by the keyboard 8 is performed by the vertical read control circuit 74.
This is performed according to the horizontal reading described above. That is, RAM7
The vertical reading start time point in 2 is gradually advanced as the time point moves from t _{0 to} t ₈ , the amount of data to be read increases, and the character screen finally stops at the position shown in the RAM 72.

The data thus obtained is converted into a proper video signal by the conversion circuit 75, is supplied to the second input terminal of the mixer 3, is superimposed on the television signal described above, and is not shown from the composite output terminal 4. It is sent to an external device.

Next, a second embodiment of the present invention shown in FIGS. 8 to 10 will be described. This embodiment is a modification of the video processing circuit 2, the horizontal read control circuit 5, and the vertical read control circuit 6 in the first embodiment described above, and other configurations are the same as those of the first embodiment described above.
It is similar to the embodiment.

In FIG. 8, the video signal processing circuit 2'is configured by a so-called external synchronization type processing circuit which does not have horizontal and vertical synchronization signal generation circuits for generating proper television signals. The synchronizing signal generating circuit is based on the oscillating circuit 10 having an oscillation frequency n times the horizontal synchronizing frequency f _H. That is, this oscillator circuit 10
The output end of Is connected to the input terminal of a frequency dividing circuit 57 having a frequency dividing ratio of, and the output terminal of the circuit 57 is connected to the video processing circuit 2'as a supply line of the horizontal synchronizing signal 100. Also, the output end of the oscillation circuit 10 Is connected to the input terminal of a frequency dividing circuit 67 having a frequency dividing ratio of 1, and the output terminal of the circuit 67 is connected to the video processing circuit 2'as a supply line of the vertical synchronizing signal 200.

The horizontal read control circuit 5'has a frequency dividing circuit 58 whose input terminal is connected to the input terminal of the frequency dividing circuit 57. Is set to. Then, the respective division ratios in both frequency dividing circuits 57 and 58 are Is set to. The output terminal of the frequency dividing circuit 57 is connected to the reset input terminal of the frequency dividing circuit 58 via a normally open switch 59 for starting horizontal scrolling. Same circuit
Reference numeral 58 is formed so that it is reset when the reset input rises to the H level and the frequency dividing operation is started. The output terminal of the frequency dividing circuit 58, that is, the output terminal of the horizontal read control circuit 5'is connected to the horizontal read start control input terminal 7A of the character generator 7.

On the other hand, the vertical read control circuit 6'has a frequency dividing circuit 68 having its input terminal connected to the input terminal of the frequency dividing circuit 67, and the circuit 68 has a frequency dividing ratio of Is set to. Then, the respective division ratios in both the frequency dividing circuits 67 and 68 are Is set to. The output terminal of the frequency dividing circuit 67 is connected to the reset input terminal of the frequency dividing circuit 68 via a normally open switch 69 for starting vertical scrolling. The circuit 68 is configured to be reset when the reset input rises to the H level and to start the frequency dividing operation. The output terminal of the frequency dividing circuit 68, that is, the output terminal of the vertical read control circuit 6'is connected to the vertical read start control input terminal 7B of the character generator.

In the video camera device of the second embodiment constructed as described above, as shown in FIG.
0 by the divider And the horizontal synchronizing signal 100 is obtained. And now
When the switch 59 for starting horizontal scrolling is closed,
When the signal 100 rises to the H level, the frequency dividing circuit 58 is reset, the frequency dividing operation in the circuit 58 starts, and the output terminal of the circuit 58 receives the signal. A signal 103 is generated which is divided by. Here, when comparing the two signals 100 and 103, the frequency of the signal 103 is higher than that of the signal 100, so that the phase shift amount for the signal 100 is controlled to gradually increase. Therefore, the signal 103 becomes the same as the signal 102 in the above-mentioned first embodiment, and the horizontal scroll operation similar to the above is performed by this signal 103.

On the other hand, in the case of starting the vertical scroll operation, when the switch 69 for starting the vertical scroll is closed, the frequency dividing circuit 67 is operated in accordance with the horizontal scroll operation described above.
As shown in FIG. 10, the vertical synchronizing signal 200 is generated from the output terminal of the frequency divider 68, and the signal 203 similar to the vertical read start signal 202 in the first embodiment described above is obtained from the output terminal of the frequency dividing circuit 68. .

Therefore, the signal 203 causes vertical reading in the character generator 7, and the signal 103 causes horizontal reading, so that horizontal and vertical scrolling operations similar to those described above can be performed.

In each of the above-described embodiments, the operation has been described in which one of the horizontal and vertical scroll operations is performed, but it goes without saying that the scroll operations in both directions may be performed simultaneously. is there. In this case, the characters forming the character screen move diagonally.

(Effects of the Invention) According to the present invention, it is possible to realize a video camera which has a simple structure, but can freely scroll a character on the screen left and right, up and down, or in an oblique direction as required.

[Brief description of drawings]

FIG. 1 is a block diagram of an electric circuit of a video camera device showing a first embodiment of the present invention, FIG. 2 is a block diagram showing the detailed construction of the character generator shown in FIG. FIG. 3 is a diagram showing details of a section area of the memory (RAM) shown in FIG. 2, and FIG. 4 is a detailed electric circuit of the Miller integrating circuit shown in FIG. 5 and 5 are waveform diagrams for explaining the horizontal scrolling operation of the video camera device shown in FIGS. 1 to 4, and FIGS. 6A to 6F are horizontal scrolling operations. FIG. 7 is a schematic diagram showing the state of character movement according to FIG. 7, FIG. 7 is a waveform diagram for explaining the vertical scrolling operation of the video camera device shown in FIGS. 1 to 4, and FIG. 9 is a block diagram of an electric circuit of a video camera device showing a second embodiment of the present invention. , A waveform diagram for explaining the horizontal scrolling operation of the video camera device shown in FIG. 8, and FIG. 10 illustrates the vertical scrolling operation of the video camera device shown in FIG. FIG. 1 ... Image sensor 2 ... Image processing circuit 3 ... Mixer 4 ... Composite output terminal 5,5 '... Horizontal direction read start control circuit 6, 6' ... Vertical direction read start control circuit 7 ... Character Generator 8 ... Keyboard

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenji Kimura Inventor Kenji Kimura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. Judgment Chairman Judge Masuo Yamada Judge Kogure Takashi Nagashima ( 56) References JP 58-6676 (JP, A) JP 57-60376 (JP, A) JP 53-24223 (JP, A) JP 60-16771 (JP, A) JP 57-125980 (JP, A)

Claims (2)

[Claims] 1. An image pickup device (1); a horizontal synchronizing signal and a vertical synchronizing signal generated in its own circuit are added to an output signal of the image pickup device (1) and converted into a video signal of a predetermined mode. Video signal processing circuit (2)
And; a character selection signal input terminal for selecting a specific one of the characters owned by itself, and a first control signal for defining the appearance timing of the selected character during horizontal scanning on the screen ( 102) First to receive
A control input end (7A), a second control input end (7B) for receiving a second control signal (202) for defining the appearance timing of the selected character during vertical scanning on the screen, A character generator (7) having an output terminal (7C) for outputting the selected character at a timing corresponding to the first control signal and the second control signal; and to its own first operating means (55) The character generator (which is activated in response to the operation and forms the first control signal (102) in which the phase shifts with time based on the horizontal synchronizing signal generated by the video signal processing circuit. A horizontal read control circuit (5) for supplying to the first control input terminal (7A) of 7); and a second operation means of its own adapted to be operated independently of the first operation means (55). Against (65) Is started in response to the operation, and based on the vertical synchronizing signal generated by the video signal processing circuit, the second control signal (202) in which the phase shifts with time is formed to form the character generator ( A vertical direction read control circuit (6) supplied to a second control input terminal (7B) of 7); an output video signal of the video signal processing circuit (2) and the output terminal (7C of the character generator (7). Mixing circuit (3) for obtaining a combined output by mixing with the output signal from
A video camera device, characterized in that the scrolling of a character on the monitor in the horizontal direction and the vertical direction can be separately activated. 2. An image pickup device (1); an image obtained by adding a horizontal synchronizing signal and a vertical synchronizing signal supplied from the outside to an output signal of the image pickup device (1) and converting the image signal into a video signal of a predetermined mode. Signal processing circuit (2 ')
And; a character selection signal input terminal for selecting a specific one of the characters owned by itself, and a first control signal for defining the appearance timing of the selected character during horizontal scanning on the screen ( 103) First to receive
A control input end (7A), a second control input end (7B) for receiving a second control signal (203) for defining the appearance timing of the selected character during vertical scanning on the screen, and A character generator (7) having an output terminal (7C) for outputting the selected character at a timing according to the first control signal and the second control signal; and an operation for the first operation means (59) of its own. In response to the signal from the reference signal generation source (10), a horizontal synchronizing signal is formed and supplied to the video signal processing circuit, and at the same time relative to the horizontal synchronizing signal on the time axis. A horizontal readout control circuit (5 ') for forming the first control signal (103) in a position shifting manner and supplying the first control signal (103) to the first control input terminal (7A) of the character generator (7); 1 The vertical synchronizing signal is activated in response to an operation of its own second operating means (69) that can be operated independently of the operating means (59) and is based on the signal from the reference signal generating source (10). Is formed and supplied to the video signal processing circuit, and the second control signal (203) is formed in such a manner that the relative position on the time axis shifts with respect to the vertical synchronizing signal with time, and the character generator (7) is formed. Vertical read control circuit (6 ') supplied to the second control input terminal (7B) of the above); the output video signal of the above video signal processing circuit (2') and the above output terminal of the above character generator (7) ( Mixing circuit (3) that mixes with the output signal from 7C) to obtain a composite output
A video camera device, characterized in that the scrolling of a character on the monitor in the horizontal direction and the vertical direction can be separately activated.