JPH1198396A - Television camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To selectively output the output order or output method of video signal outputs delayed for required time by controlling a selector for selectively outputting either a video signal inputted from a video signal processing circuit or a video signal inputted from a video signal data storage device and delayed for the required time. SOLUTION: At a video signal data storage device 1, digital video signals (a) stored in memory devices 1-1, 1-2,...1-n are read out after the lapse of required time by a memory drive pulse (g) from a memory drive circuit 3 and outputted to a selector 4 as digital signals (b) delayed for the required time. The real-time digital video signal (a) is inputted from one input terminal to the selector 4, and the digital video signal (b) delayed for the required time is inputted from the other input terminal. Then, any one of them is selected by a select pulse (f) separately inputted to a control input terminal, and a digital video signal (c) is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to selectively output a real-time video signal output of a subject being imaged through an imaging lens and a video signal output obtained by delaying the real-time video signal output by a required time interval. It relates to a television camera that can be used.

[0002]

2. Description of the Related Art Conventionally, a television camera photoelectrically converts incident light from a subject incident on an image pickup device through an image pickup lens into a video signal by the image pickup device, and converts the video signal obtained by the photoelectric conversion to a required level. After performing amplification, required video signal processing, and the like, a video signal output of a predetermined level is output to other devices such as a video monitor and a video tape recorder according to the purpose. The video signal output output from the television camera to another device is a real-time video signal output of the subject currently being imaged by the television camera. At the same time, the video signal output of the moving subject is output from the television camera, and the movement of the subject can be monitored almost simultaneously with another device, for example, a video monitor. By the way, the video signal output (or, for example, as a video monitored by a video monitor) output from the television camera is switched from the real-time video signal output currently output depending on the use, and then the video signal output delayed for a required time is continued. May be required.

Conventionally, in order to obtain a video signal output delayed by the required time, a real-time video signal output from a television camera is input to a video signal data recording device which is one of other devices. The video signal output is temporarily stored, read out after a required time, and a video signal output delayed for a required time is obtained. The video signal data recording device for obtaining a video signal output delayed by the required time includes a plurality of memory devices capable of storing video signal data in order to obtain a required delay time. The video signal data can be stored for a long time, and the video signal data can be read out after a required time.

[0004]

A conventional television camera outputs a real-time video signal output.
The video signal output delayed for the required time cannot be output. Therefore, when a video signal output delayed for a required time is required, the real-time video signal output from the television camera is input to a video signal data recording device, which is another device, and the video signal output is stored. Then, after the required time, the video signal output must be read to obtain a video signal output delayed for the required time. Since this video signal data recording device is another device, in combination with a television camera, The system had to be configured and used. Also, the video signal data recording device can store video signal data for a long time, but is expensive if the number of memory devices provided for storing the video signal output is increased. Become. The present invention solves the above-mentioned problem, and has a video signal data recording device capable of delaying a video signal output for a required time in a television camera, and selecting a real-time video signal output or a video signal output delayed for a required time. An object of the present invention is to provide a television camera that can output a video signal and that can select an output order, an output method, and the like of a video signal output delayed for a required time.

[0005]

In order to achieve the above object, a television camera according to the present invention comprises an imaging lens, and an imaging device that photoelectrically converts incident light incident from the imaging lens and outputs a video signal. An amplifier for amplifying a video signal input from the image sensor and outputting a video signal of a required level, and a video signal processing circuit for processing the video signal of the required level input from the amplifier and outputting a video signal of a predetermined level A video signal data storage device including a plurality of memory devices for storing a video signal input from the video signal processing circuit, reading and outputting a video signal delayed for a required time, and the video signal. Selectively output either the video signal input from the processing circuit or the video signal delayed from the video signal data storage device for a required time. And a selector for controlling the selector to selectively output either the video signal input from the video signal processing circuit or the video signal delayed by a required time input from the video signal data storage device. It is.

Further, the television camera of the present invention stores a video signal input from a video signal processing circuit by a write pulse for each required time, and reads and outputs a video signal delayed for a required time by a read pulse for each required time. A video signal data storage device having a plurality of memory devices, and selectively outputting either a video signal input from the video signal processing circuit or a video signal delayed from the video signal data storage device by a required time. And a write pulse and a read pulse for controlling storage of the video signal input to the video signal data storage device for each required time and reading of the stored video signal for each required time, and a selection output of the selector. A memory drive circuit that outputs a select pulse to be controlled and
The selector is controlled by a select pulse, and selectively outputs either the video signal input from the video signal processing circuit or the video signal delayed from the video signal data storage device by a required time.

Further, the television camera of the present invention stores the video signal input from the video signal processing circuit by a write pulse for each required time, and reads out and outputs a video signal delayed for a required time by a read pulse for each required time. A video signal data storage device having a plurality of memory devices, and selectively outputting either a video signal input from the video signal processing circuit or a video signal delayed from the video signal data storage device by a required time. And a write pulse and a read pulse for controlling storage of the video signal input to the video signal data storage device for each required time and reading of the stored video signal for each required time, and a selection output of the selector. There is a memory drive circuit that outputs a select pulse to be controlled, and an alarm signal that is input. By remote control signal controls the pulse output to be output from the memory drive circuit, and a CPU for controlling the pulse generation time, and controls the selector by the select pulse,
While selectively outputting either the video signal input from the video signal processing circuit or the video signal delayed for a required time input from the video signal data storage device,
The video signal data storage device controls storage or reading of a video signal stored and read.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a television camera according to the present invention will be described with reference to FIGS. FIG.
FIG. 1 is a block diagram of a television camera according to the present invention. (Note that FIG. 1 shows only those parts necessary for explaining the television camera according to the present invention.) In FIG. 1, 1 denotes a plurality of memory devices 1-1, 1-2,...
The video signal data storage device 4 provided with 1-n stores either the input real-time digital video signal or the digital video signal read from the video signal data storage device 1 and delayed at a required time interval. The selector 2 for selecting and outputting a plurality of memory devices 1-1, 1- 1 of the video signal data storage device 1 according to the input control signal.
2,... 1-n, a CPU (Central Processing Unit) for outputting a control signal for controlling the selector 4 and the like;
, 1-2 of the plurality of memory devices 1-1, 1-2,... 1 of the video signal data storage device 1 in accordance with a control signal output from
n, a memory drive circuit that outputs a select pulse, a memory drive pulse (including a write enable pulse, a read enable pulse, a write / read reset pulse, a write / read clock pulse, etc.) for controlling the selector 4 and the like. It is built into the television camera.

The operation of the television camera according to the present invention will be described below. 2. Description of the Related Art A television camera photoelectrically converts incident light from a subject incident on an imaging device from an imaging lens into a video signal using the imaging device, and outputs the video signal obtained by the photoelectric conversion to an amplifier. The amplifier amplifies the input video signal to a required level and outputs the required level of the video signal to the video signal processing circuit. The video signal processing circuit performs required video signal processing such as gamma correction and white clip on the input video signal of a required level, further amplifies the video signal to a predetermined level,
A video signal of a predetermined level is output to an AD converter. The A / D converter converts the input video signal of a predetermined level into a digital video signal (if the required video signal processing and amplification have been performed by digital processing, the digital video signal has already been converted. Is unnecessary), and is output to the video signal data storage device 1 and the selector 4 as a digital video signal a. Video signal data storage device 1
Are a memory device 1-1, a memory device 1-2,..., A memory device 1-n and a plurality of memory devices (for example, memory I
C is used, and the inputted digital video signal a is stored in the memory device 1-1, the memory device 1-2,...
Input to each memory device of the memory device 1-n,
It is stored at the timing of a memory drive pulse g separately input from the memory drive circuit (for example, using a programmable gate array) 3 to the video signal data storage device 1.

The video signal data storage device 1 includes a memory device 1-1, a memory device 1-2,...
-N digital video signal a stored in each memory device
Is read out after a required time by a memory drive pulse g output from the memory drive circuit 3 to the video signal data storage device 1, and is output to the selector 4 as a digital video signal b delayed by a required time. As aforementioned,
The selector 4 receives a real-time digital video signal a from one input terminal, receives a digital video signal b delayed for a required time from the other input terminal, and inputs the digital video signal b separately to a control input terminal. Real time digital video signal a
Or the digital video signal b delayed by the required time, and outputs the selected digital video signal c. The television camera uses the digital video signal c as it is as the output of the television camera or provides a D / A converter, and temporarily inputs the digital video signal c to the D / A converter to convert the digital video signal c into an analog video signal. May be output.

As described above, the television camera of the present invention can selectively output a real-time digital video signal a or a digital video signal b delayed for a required time. The user can select a required time interval, a required time delay, an output order, and an output method according to a required purpose. Here, some examples of the write signal and read signal of the memory drive pulse g and the timing of the select pulse f for controlling the video signal data storage device 1 and the selector 4 according to the required purpose are shown in FIG. This will be described with reference to timing charts shown in FIGS. In the timing charts shown in FIGS. 2 to 5, the external alarm signal for controlling the CPU
It is described as being entered between 8 and 09,
An example in which five memory devices included in the video signal data storage device 1 are used in combination with the memory devices 1-1 to 1-5 is described. In addition, a real-time digital video signal a output from the television camera or stored in the video signal data storage device 1
(In the figure, a video signal a) is a digital video signal in field units, and has field numbers 00, 01, and 02.
... is indicated.

A write pulse in the memory drive pulse g is a memory 1 write enable pulse to a memory 5 write enable pulse (shown as memory 1 write to memory 5 write in the figure), and a read pulse is a memory 1 read enable pulse. These are a pulse to a memory 5 read enable pulse (shown as memory 1 read to memory 5 read in the figure). The memory 1 write enable pulse to the memory 5 write enable pulse of these write pulses and the memory 1 pulse to the memory 5 read enable pulse of the read pulse are controlled by a control signal from the CPU 2. The data is output to the memory devices 1-1 to 1-5 provided in the storage device 1, respectively.

The real-time digital video signal a is
When each write enable pulse is at a high level, video signals 00, 01, 0 in continuous field units
Are written and stored in the memory devices 1-1 to 1-5 of the video signal data storage device 1, respectively. In FIG. 2, when an external alarm signal is input to the CPU 2, a video signal before the input of the alarm signal is stored.
When the write enable pulse is at a high level, the field 00 of the digital video signal a is stored in the memory device 1-1.
And when the memory 2 write enable pulse is at a high level, the field 0 of the digital video signal a is
2 is stored in the memory device 1-2. Similarly, when the memory 5 write enable pulse is at a high level, the field 08 of the digital video signal a is stored in the memory device 1-2.
-5 is stored. Therefore, by shifting the timing of the high level of the write enable pulse to be several fields between the memory devices, the real-time digital video signal a is thinned out by several fields and stored in each memory device. As the digital video signal b read from each memory device, a digital video signal b delayed for a longer time than when stored in each field can be obtained.

FIG. 2 shows a timing chart in the case where five field memory devices are used as the memory device and the timing of the high level of the write enable pulse is every two fields. Therefore, when the digital video signal a for each field is stored in five memory devices, the digital video signal a for every two fields is stored in five memory devices, while the delay of five fields is stored. It is possible to output a delayed digital video signal. FIG. 2 shows a timing chart in which the high-level timings of the memory 1 read enable pulse to the memory 5 read enable pulse, which are read pulses, are continuous in two fields. When the digital video signal a stored in the memory device 1-5 is read out, the digital video signal a is stored for each field in the memory devices 1-1 to 1-5. The delayed digital video signal b output from 1 has 0
0, 00, 02, 02, ... 08, 08 are output.

Therefore, it can be understood that a digital video signal with a longer delay can be output by setting the timing at which the write enable pulse goes high at a long interval of four fields and six fields. However, when the timing is set at a long interval and the time is delayed for a long time, an image of a fast-moving subject becomes an unnatural image. Further, the CPU 2 and the memory drive circuit 3 control the read enable pulse for reading the digital video signal stored in each memory device so that the required read timing is obtained, so that the video monitored by the video monitor can be variously controlled. In the form of

In FIG. 3, a video signal data storage device 1
The timing at which the write enable pulse goes high to store the digital video signal a in the memory devices 1-1 to 1-5 is the same as that in FIG. However, in the case of FIG. 3, only the memory 3 read enable pulse is applied for a required period (10 in FIG. 3).
By setting the level to a high level, only the digital video signal 04 stored in the memory device 1-3 is output from the digital video signals recorded in each memory device. Outputs a digital video signal 04 as a digital video signal b, which can be monitored as a still image on a video monitor. In this case, a memory device to be read can be selected by inputting a required remote control signal d to the CPU 2 from a remote control device (not shown).

In FIG. 4, a video signal data storage device 1
The timing at which the write enable pulse goes high to store the digital video signal a in the memory devices 1-1 to 1-5 is the same as that in FIG. However, in the case of FIG. 4, the required period of the high level of each read enable pulse of each memory device (four field periods in FIG. 4) is lengthened so that each read enable pulse of each memory device becomes
Like the memory device 1-1, the memory device 1-2,..., The memory device 1-5, by increasing the required period of the high level in order, the digital video signal b of the long period from each memory device can be generated. It is output and can be monitored as a frame-advanced video on a video monitor.

In FIG. 5, a video signal data storage device 1
The timing at which the write enable pulse goes high to store the digital video signal a in the memory devices 1-1 to 1-5 is the same as that in FIG. However, in the case of FIG. 5, the order of the high-level required period (two-field period in FIG. 5) of each read enable pulse of each memory device is determined by the order of the memory devices 1-5, the memory devices 1-4,.・ Memory device 1
In this case, the digital video signal b is output in the reverse order of the recording from each memory device, and the video recorded on the video monitor can be monitored in the reverse order. It becomes possible. As described above, by controlling the write enable pulse and the read enable pulse of each memory device according to the required purpose, the video signal output can be set in various output orders and output methods, and a multifunctional television can be set. Became a camera. In addition, a television camera is a black and white television camera,
Any of a color television camera may be used.

[0019]

According to the present invention, a video signal data recording device capable of delaying a video signal output for a required time is provided in a television camera, and a real-time video signal output or a video signal output delayed for a required time is selected. And a television camera capable of selecting an output sequence, an output method, and the like of a video signal output delayed for a required time.

[Brief description of the drawings]

FIG. 1 is a block diagram of a television camera according to the present invention.

FIG. 2 is a timing chart for storing and reading a video signal of the television camera according to the present invention.

FIG. 3 is a timing chart of storing a video signal and reading a still image of the television camera according to the present invention.

FIG. 4 is a timing chart of storage of a video signal of a television camera and frame-by-frame readout according to the present invention.

FIG. 5 is a timing chart of storing and reverse reading of video signals of the television camera according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Video signal data storage device 1-1, ... 1-n memory device 2 Central processing unit (CPU) 3 Memory drive circuit 4 Selector.

Claims (3)

[Claims] 1. An image pickup lens, an image pickup device that photoelectrically converts incident light incident from the image pickup lens and outputs a video signal, and amplifies a video signal input from the image pickup device and outputs a video signal of a required level. And a video signal processing circuit for processing a video signal of a required level input from the amplifier and outputting a video signal of a predetermined level, wherein the video signal input from the video signal processing circuit is A video signal data storage device comprising a plurality of memory devices for storing and reading and outputting a video signal delayed for a required time; and a video signal input from the video signal processing circuit, or a video signal input from the video signal data storage device. A selector for selecting and outputting one of the video signals delayed for a required time, controlling the selector, and inputting the video signal from the video signal processing circuit. A television camera, which selectively outputs any one of a received video signal and a video signal delayed by a required time inputted from the video signal data storage device. 2. An imaging lens, an imaging device that photoelectrically converts incident light incident from the imaging lens to output a video signal, and amplifies a video signal input from the imaging device and outputs a video signal of a required level. And a video signal processing circuit for processing a video signal of a required level input from the amplifier and outputting a video signal of a predetermined level, wherein the video signal input from the video signal processing circuit is A video signal data storage device including a plurality of memory devices for storing a write pulse for each required time and reading and outputting a video signal delayed for a required time by a read pulse for each required time, and input from the video signal processing circuit. A video signal or a video signal which is input from the video signal data storage device and which is delayed by a required time, for selectively outputting the video signal; A write pulse and a read pulse for controlling storage of the video signal input to the video signal data storage device for each required time and reading of the stored video signal for each required time, and controlling a selective output of the selector. And a memory drive circuit that outputs a select pulse to be controlled, the selector control the selector by the select pulse, and a video signal input from the video signal processing circuit or a required time delay input from the video signal data storage device. A television camera, which selectively outputs any one of the selected video signals. 3. An imaging lens, an imaging device that photoelectrically converts incident light incident from the imaging lens and outputs a video signal, and amplifies a video signal input from the imaging device and outputs a video signal of a required level. And a video signal processing circuit for processing a video signal of a required level input from the amplifier and outputting a video signal of a predetermined level, wherein the video signal input from the video signal processing circuit is A video signal data storage device including a plurality of memory devices for storing a write pulse for each required time and reading and outputting a video signal delayed for a required time by a read pulse for each required time, and input from the video signal processing circuit. A video signal or a video signal which is input from the video signal data storage device and which is delayed by a required time, for selectively outputting the video signal; A write pulse and a read pulse for controlling storage of the video signal input to the video signal data storage device for each required time and reading of the stored video signal for each required time, and controlling a selective output of the selector. A memory drive circuit that outputs a select pulse to be output, and a pulse output that is output from the memory drive circuit and a pulse generation time that is controlled by an input alarm signal or remote control signal.
A PU, controlling the selector by a select pulse, and selectively outputting either a video signal input from the video signal processing circuit or a video signal delayed by a required time input from the video signal data storage device A television camera for controlling storage or reading of a video signal stored and read by the video signal data storage device.