JP2000194063A - Televitsion image pickup device and television receiver and camera used the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible for the television image pickup device to easily pick up a television image even if the device has a very simple structure. SOLUTION: This television image pickup device is provided with a television receiver 1 for displaying a television image to be picked up, a digital camera 2 for recording a picked-up image in a memory 22 at the timing shown by the vertical synchronizing signal α when a shutter 25 is released to pick up the television image, and a signal cable for leading the vertical synchronizing signal αgenerated by the television receiver 1 to the digital camera 2 therefrom. Namely, no matter what timely the shutter 25 is released to pick up the television image by using the digital camera 2, the recording of the pickup image is not started during the scanning period of the television image, but the television image in the same field is recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television image photographing apparatus for photographing and recording television images using an electronic camera or the like, a television receiver used in the apparatus, and a camera used in the apparatus.

[0002]

2. Description of the Related Art Since a television image displayed on a television receiver is switched every several tens per second, it is not easy to take a television image using a camera. In this regard, Japanese Patent Laid-Open No. 60-79877 discloses a configuration of a shutter device suitable for capturing a moving image without blurring.

In this apparatus, a shutter composed of a rotating disk provided with an opening for allowing short-time exposure to the image sensor in front of the image sensor is rotationally driven by a servomotor, and the exposure through the opening of the shutter is performed. The basic configuration is such that the synchronization is performed in synchronization with the blanking cycle of the vertical signal derived from the image sensor.

[0004]

However, apart from whether a television image can be easily photographed using a camera to which such a shutter device is applied, at least the structure is very complicated. Because it ’s clear,
There is an essential disadvantage that it is extremely difficult to reduce the size and cost of the camera.

The present invention has been made in view of the above background, and has as its object a television image photographing apparatus and a television image photographing apparatus capable of easily photographing television images while having a very simple structure. An object of the present invention is to provide a television receiver used in the device and a camera used in the device.

[0006]

A television image photographing apparatus according to the present invention comprises a television receiver for displaying a television image of an object to be photographed, and a vertical image of the image when a shutter is released for photographing the television image. The camera is characterized by comprising a camera that records a captured image at a timing indicated by a synchronization signal, and a signal transmission unit that guides a vertical synchronization signal generated by the television receiver to the camera from the camera. It is desirable to use a signal cable as the signal transmission means.

In such a configuration, recording of the photographed image does not start during the scanning period of the television image, even if the shutter is released at any timing for photographing the television image using the camera. As long as the shutter speed is appropriate, a television image of the same field will be recorded.

A television receiver used in a television image photographing apparatus according to the present invention is provided with a synchronization signal output terminal to which one end of a signal cable as signal transmission means is connected, and a vertical signal included in a video signal. The synchronization signal is output to the terminal.

The camera used in the television image photographing apparatus according to the present invention is provided with a synchronization signal input terminal to which the other end of the signal cable as signal transmission means is connected, and from which a vertical synchronization signal is input. It is characterized in that it is configured to be.

[0010] The television receiver used in the television image photographing apparatus and the camera used in the television image photographing apparatus are the same as the above-described television image photographing apparatus.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a television image photographing apparatus.

The television image photographing apparatus described here by way of example is a CRT (cathode rayt) of the television receiver 1.
ube) 12 is a device for photographing and recording the television image output to the digital camera 2 using the digital camera 2. The television receiver 1 displays the television image of the object to be photographed, and the shutter 25 for photographing the television image. A digital camera 2 that records a captured image at the timing indicated by the vertical synchronization signal α of the image when cut off, and a signal transmission unit that guides the vertical synchronization signal α generated by the television receiver 1 to the digital camera 2 from the same. The signal cable 3 of FIG. The television receiver 1 is provided with a synchronization signal output terminal 15 to which one end of the signal cable 3 is connected, while the digital camera 2 is provided with a synchronization signal input terminal 28 to which the other end of the signal cable 3 is connected. Is provided. Hereinafter, each component will be described in detail.

The television receiver 1 includes a video signal processing circuit 10 for generating a video composite signal for outputting a television image to a CRT 12, a synchronization signal separation circuit 11 for extracting a synchronization signal from the video composite signal, It comprises a low-pass filter 13 that blocks a horizontal synchronizing signal from the signal to extract a vertical synchronizing signal of 60 Hz, a buffer amplifier 14 that amplifies the vertical synchronizing signal α and outputs it to a synchronizing signal output terminal 15.

The vertical synchronizing signal output to the CRT 12 may be directly output to the buffer amplifier 14.

The digital camera 2 includes a CCD (Charge Coupled Device) 20 for photoelectrically converting an object to be photographed,
A memory 22 such as a flash memory for recording the image data output from the memory 20, a display circuit 23 for performing predetermined conversion of the image data read from the memory 22, and a display circuit 23
LCD (liqu) that displays and outputs image data output from
id Crystsl Display) 24, a control circuit 21 which is a microcomputer for controlling the CCD 20, the memory 22, the display circuit 23, etc. according to each output signal of the shutter 25 and the operation switch 28, and a vertical input from the synchronization signal input terminal 28. A buffer amplifier 26 for amplifying the synchronization signal α, a trigger circuit 27 for performing an AND operation of the shutter signal β output from the shutter 25 and the vertical synchronization signal α output from the buffer amplifier 26, and outputting the result to the control circuit 21. It is configured.

That is, when the power switch included in the switch 28 is turned on, the object to be photographed is constantly displayed and output on the LCD 24, and when the shutter 25 is released, the image data at this time is recorded in the memory 22. . The shutter speed can be freely adjusted through the operation switch 28. This is the basic function of the digital camera 2. Here, a new mode called TV image shooting, which will be described next, is newly added.

When the normal photographing mode is selected, the shutter signal β output from the shutter 25 passes through the drigger circuit 27 as it is and is input to the control circuit 21. When the television image shooting mode is selected, the trigger circuit 27 is activated, and the shutter signal β output from the shutter 25 is input to the control circuit 21 at the timing when the vertical synchronization signal α becomes active. I have.
Here, since the vertical synchronizing signal α and the shutter signal β are of positive logic, an AND circuit is basically used as the trigger circuit 27.

Next, a method of using the television image photographing apparatus configured as described above will be described. First, the television receiver 1 and the digital camera 2 are connected to each other with a signal cable 3 and the operation switch 2 of the digital camera 2 is connected.
The user selects the TV image shooting mode through 8 and sets the shutter speed to 1/60 or 1/30 seconds. Then, the digital camera 2 shoots a television image output to the CRT 12 of the television receiver 1. When the photographing is completed, the memory 22 is taken out from the digital camera 2,
When the image data recorded in the memory 22 is read using another computer or the like, the captured image is reproduced. The captured image reproduced at this time is a very clear image for the following reason.

When a television image is photographed using a conventional digital camera, even if the shutter speed is 1/60
Or, even if it is set to 1/30 second, it is difficult to capture a clear image for the following reasons. That is,
This is because the television screen displayed on the television receiver switches every few tens of frames per second, and if the shutter is released in the middle, a television image covering two fields is taken.

In this regard, the CRT 1 of the television receiver 1
When the digital camera 2 captures a television image output to the digital camera 2, the captured image is recorded in the memory 22 at the timing indicated by the vertical synchronization signal α of the image, regardless of the timing at which the shutter 25 is released. That is, memo 12
2, the television image of the same field is always recorded, so that the captured image is very clear.

Further, since only a slight design change is required for the television receiver 1 and the digital camera 2, it is very difficult to reduce the cost and performance of the television receiver 1 and the digital camera 2. Is of great significance. Further, when the television image shooting mode is selected through the operation switch 28 of the digital camera 2, if the shutter speed is automatically set to 1/60 or 1/30 second, not only the usability is further improved, but also Thus, it is possible to shoot a television image without failure.

The television image photographing apparatus according to the present invention is not necessarily limited to the above embodiment. For example, the signal transmission means may have a configuration in which a vertical synchronization signal generated by a television receiver is transmitted as light, radio waves, or the like, and is received by a camera. Alternatively, a synchronization signal may be output from a television receiver, and the camera may reproduce the vertical synchronization signal. Further, the present invention is not limited to the application to a digital camera, but can also be applied to an electronic still camera having a function of automatically controlling an aperture, a shutter speed, and the like.

[0023]

As described above, according to the television image photographing apparatus according to the first aspect of the present invention, the photographed image is recorded even if the shutter is released at any timing for photographing the television image using the camera. Is not started during the scanning period, and a television image of the same field is recorded as long as the shutter speed is appropriate, so that the television image can be easily photographed. Moreover, since the configuration of the entire device is simple,
It is possible to reduce the cost, size, and performance of the television receiver and the camera.

In the case of the television image photographing apparatus according to the second aspect of the present invention, since a signal cable is used as a signal transmission means, no signal conversion is performed on a vertical synchronizing signal generated by a television receiver. This can lead the camera directly to the camera without performing the operation. In this respect, the configuration of the entire apparatus becomes very simple, and the cost of the television receiver and the camera can be further reduced.

In the case of the television receiver used in the television image photographing apparatus according to the third aspect of the present invention, it has a very simple structure such as providing a synchronization signal output terminal for connecting a signal cable. Therefore, the same effect as the second aspect can be obtained.

In the case of the camera used in the television image photographing apparatus according to the fourth aspect of the present invention, the camera has a simple structure such as providing a synchronization signal input terminal for connecting a signal cable. The same effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention, and FIG. 1 is a configuration diagram of a television image photographing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 television receiver 10 video signal processing circuit 12 CRT 13 low-pass filter 14 buffer amplifier α vertical synchronization signal 2 digital camera 20 CCD 21 control circuit 22 memory 25 shutter 26 buffer amplifier 27 trigger circuit 3 signal cable

Claims (4)

[Claims] 1. A television receiver for displaying a television image of an object to be photographed, a camera for recording a photographed image at a timing indicated by a vertical synchronization signal of the image when a shutter is released for photographing the television image, A television image photographing apparatus, comprising: signal transmission means for guiding a vertical synchronization signal generated by the television receiver from the television receiver to the camera. 2. The television image photographing apparatus according to claim 1, wherein a signal cable is used as said signal transmission means. 3. A television receiver for use in a television image photographing apparatus according to claim 2, further comprising a synchronization signal output terminal to which one end of said signal cable is connected, wherein a vertical synchronization signal included in the video signal is provided. A television receiver used in a television image photographing device, which is configured to output a signal to the terminal. 4. A camera used in a television image photographing apparatus according to claim 2, further comprising a synchronization signal input terminal to which the other end of said signal cable is connected, and from which a vertical synchronization signal is input. A camera used in a television image photographing apparatus, characterized in that the camera has a configuration as described above.