JPH05227459A - Still picture recording system - Google Patents

Abstract

PURPOSE:To miniaturize and lighten a camera head part so as to install it in various places, to easily exchange a recording medium and a battery on a signal recording part-side and to remotely operate the camera head part. CONSTITUTION:This camera is provided with a camera head part 20 having an optical system, CCD 15, 16 and shutters 13, 14, and a signal recording part 40 having the recording medium recording a picture signal, a conversion means converting the picture signal into a recording signal and a recording means for recording the recording signal. The camera head part 20 is connected with the signal recording part 40 by a signal cable 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still image recording system for recording a still image on a recording medium.

[0002]

2. Description of the Related Art Conventionally, as a still image recording system for recording a still image on a recording medium, a large amount of still images are accumulated and an arbitrary screen (one frame) requested to be output is retrieved and output as a video signal. There is a still image file device. As the still image file device, a device for storing the optical system as it is (for example, so-called microfilm), a device for analog recording on a magnetic recording medium such as a magnetic disk, a device for digitally compressing data after digitization, and There is one that records on a large capacity optical video disc.

By the way, in a so-called electronic still camera as a still image recording system for recording a still image on the magnetic disk, as shown in FIG. (Return mirror) 11, prism 17, optical system including lens system 10 and drive motor of this lens system 10, CCD 16 for Y signal, shutter 14 and C for C signal
An image pickup unit including a CD 15 and a shutter 13, a recording unit 18 including a disk drive mechanism for a magnetic disk such as a magnetic floppy disk and a magnetic head, a power supply unit including a battery and the like (not shown), Further, a finder 12 is provided.

That is, the electronic still camera shown in FIG. 5 is of a so-called two-plate type, and includes the Y signal CCD 16 and C.
With the signal CCD 15, for example, about 380,000 pixels, 50
It is possible to obtain 0 or more horizontal resolutions.
Further, the shutters 13 and 14 are so-called focal plane shutters, and are capable of high-speed shooting for about 1/2000 sec, for example. This shutter 13,1
By having 4, the frame image can be captured even with a high-speed shutter of 1/60 sec or more, for example. Moreover, it is possible to realize a vertical resolution of 450 TV lines or more. Further, the mirror 11 is a mirror for guiding incident light to the optical system of the finder 12,
The incident light is guided to the prism 17 by being raised (repelled) during photographing. Thereby, the image of the incident light is formed on each of the CCDs 15 and 16. Further, when the mirror 11 is lowered, the incident light is guided to the optical system of the finder 12, whereby an image can be observed and focusing or the like can be performed.

[0005]

By the way, there are cases where it is desired to install the electronic still camera at various positions (for example, a position near the ceiling or a remote place) like a security camera. However, in this case, in the above-mentioned conventional electronic still camera, it is necessary to replace the magnetic disk or the battery, and it is very inconvenient if they are installed in a high position where it is difficult to replace them. Further, since the camera itself is enlarged because it has the image pickup section, the recording section, the power supply section, etc., it is a factor that limits the installation position and the fixing jig for the installation. Note that the conventional electronic still camera cannot be operated remotely by the camera alone.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and it is compact and can be installed at various positions. It is easy to replace a magnetic disk or a battery, and remote control is possible. An object is to provide a possible still image recording system.

[0007]

A still image recording system of the present invention has been proposed in order to achieve the above-mentioned object, and in a still image recording system for recording a still image signal on a recording medium, A camera head unit having at least an optical system, a solid-state image sensor for converting incident light into an electric signal, and a shutter for taking out an image in a frame unit, a recording medium for recording the image signal taken out in the frame unit, and the image signal A signal recording unit having a conversion unit for converting a recording signal for recording on the recording medium and a recording unit for recording the recording signal on the recording medium, and a signal for the camera head unit and the signal recording unit. It is designed to be connected by a cable.

[0008]

According to the still image recording system of the present invention, since the camera head section and the signal recording section are separated from each other, only the camera head section can be downsized, and the camera head section and the signal recording section can receive signals. Since it is connected by a cable, the image signal captured by the camera head unit can be recorded by the signal recording unit.

[0009]

Embodiments of the still image recording system of the present invention will be described below with reference to the drawings. In FIG. 1 showing the schematic configuration of the still image recording system of the present embodiment, the same components as those in FIG. 5 described above are designated by the same reference numerals. The still image recording system of this embodiment is a still image recording system for recording a still image signal on a recording medium such as a magnetic floppy disk as shown in FIG.
An optical system including at least the prism 17, the lens system 10, and the respective motors 21, 22, 23 for driving the lens system 10, the CCD 16 for the Y signal (luminance signal) for converting the incident light into an electric signal, and the C signal ( A camera head unit 20 having a CCD 15 for color signals) and shutters 13 and 14 for taking out images in frame units, a magnetic floppy disk for recording the image signals taken out in frame units, and the image signals to the magnetic floppy disk. The camera head unit 2 includes a signal recording unit 40 having a converting unit for converting a recording signal for recording and a recording unit for recording the recording signal on the magnetic floppy disk.
0 and the signal recording unit 40 are connected by a signal cable 30.

That is, as compared with the configuration of FIG. 5 described above, the camera head unit 2 of the still image recording system of FIG.
Reference numeral 0 does not have a recording unit (18) composed of a disk drive mechanism of a magnetic floppy disk, a magnetic head, or the like, and a power supply unit in which a battery or the like is arranged. Therefore, the structure is simple and the size and weight can be reduced. There is. Moreover, since the camera head 20 is not provided with the finder (12), the flip-up mirror 11 and the like are not necessary, which also enables weight reduction and simplification of the configuration. There is.

The recording unit (18) and the battery as described above are provided on the signal recording unit 40 side of the present embodiment,
The image signal from the camera head unit 20 is sent to the signal recording unit 40 via the signal cable 30. In addition,
If the power is obtained from the power cord in the signal recording unit 40, the battery or the like becomes unnecessary. Therefore, the image signal captured by the camera head unit 20 is transferred to the signal recording unit 4 via the signal cable 30.
When sent to 0, the signal recording unit 40 records the image signal captured by the camera head unit 20. Therefore, it is not necessary to replace the magnetic floppy disk or the battery with respect to the camera head section 20 as in the above-described conventional example. Therefore, for example, the camera head section 20 can be installed at a remote location. It is possible to use it for installation.

The signal recording section 40 also has a built-in structure for remote operation of the camera head section 20.
The camera head unit 20 can be remotely operated from the signal recording unit 40. Further, in the camera head portion 20 of this embodiment, the finder 1 having the configuration shown in FIG.
2 is not provided, the image captured by the monitor 50 can be observed by sending the image signal from the camera head unit 20 to the monitor 50 via the signal recording unit 40 and the signal cable 31. It is possible. Therefore, by observing the image captured by the monitor 50 and performing remote control from the signal recording unit 40, the focus drive motor 21 and the zoom drive of the lens system 10 of the camera head unit 20 can be performed. The motor 22 and the iris drive motor 23 can be remotely operated, and the focus, zoom, and iris can be controlled, and focusing, framing, and the like can be performed. Of course, these focus, zoom, and iris controls can be performed automatically (for example, auto focus, auto iris, etc.) instead of being operated remotely.

The camera head section 20 is of a so-called two-plate type, and has a Y signal CCD 16 and a C signal CCD.
15, the horizontal resolution of 500 or more can be obtained with, for example, about 380,000 pixels. Further, the shutters 13 and 14 are so-called focal plane shutters, and are capable of high-speed shooting for about 1/2000 sec, for example. By including the shutters 13 and 14, it is possible to capture a frame image even with a high-speed shutter of 1/60 esc or more, for example. Moreover, it is possible to realize a vertical resolution of 450 TV lines or more.

Further, although not shown, a microphone or the like is provided in the camera head portion 20 of this embodiment so that the sound picked up by this microphone is recorded on the magnetic floppy disk of the signal recording portion 40. Is also possible.

FIG. 2 shows a block circuit diagram of the camera head section 20. In FIG. 2, the lens system 1
The focus drive motor 21, the zoom drive motor 22, and the iris drive motor 23 described above are provided at 0. The iris drive motor 23 is an iris (aperture).
Drive 61. These focus drive motors 21,
The zoom drive motor 22 and the iris drive motor 23 are
The control circuit of the signal recording unit 40 (see FIG.
Lens control CPU 62 controlled according to a control signal (mechanism control signal) supplied from the control circuit 120 of
The drive control is performed by. The circuit of the camera head unit 20 is also provided with a light amount sensor 63 for detecting the light amount for automatic iris control. This light amount detection output is sent to the control circuit 120 of the signal recording section 40 via the terminal 77.

Incident light from the lens system 10 and the like passes through a shutter 64 (14) or a shutter 65 (13) and a CCD 67 (16) for a Y signal or a C for a C signal.
The image is taken on CD68 (15). CCD 6 for the Y signal
7 is driven by a timing signal generation circuit 69 that generates a CCD drive timing signal for the Y signal, and
Based on a signal from the electronic shutter control circuit 76, it also operates as a so-called electronic shutter. The C signal CCD 68 is a C signal C
It is driven by a timing signal generation circuit 70 that generates a CD drive timing signal, and also operates as an electronic shutter based on the signal from the electronic shutter control circuit 76. The timing signal generation circuits 69 and 70 generate the CCD drive timing signal in response to the clock from the oscillator 75 and the synchronization signal from the synchronization signal generation circuit 74 to operate based on the clock of the oscillator 75. It is a thing. The synchronization signals (vertical synchronization and horizontal synchronization signals) from the synchronization signal generation circuit 74 are also sent to terminals 80 and 81. The terminals 80 and 81 are connected to the corresponding terminals of the signal recording unit 40 via the signal cable 30.

The image pickup signal from the Y signal CCD 67 is output from the terminal 78 via the Y signal separator 71 which operates based on the output of the timing signal generating circuit 69. The terminal 78 is connected to the corresponding terminal of the signal recording unit 40 via the signal cable 30. The image pickup signal from the upper C signal CCD 68 is
It is sent to the chroma signal separator 72 which operates based on the output of the timing signal generation circuit 70. R, G, B by passing through the chroma signal separator 72.
The light is the signal of the three primary colors. The R, G, B signals are output from a terminal 79 via an auto white balance circuit 73 that automatically adjusts the white balance based on the detection signal from the white balance sensor 64. The terminal 79 is connected to the corresponding terminal of the signal recording unit 40 via the signal cable 30.

The shutters 64 and C for the Y signal are provided.
The signal shutter 65 and the electronic shutter control circuit 76 are also controlled by the control circuit 120 of the signal recording section 40 via the terminal 77.

FIG. 3 shows a schematic block circuit diagram of the signal recording section 40. In the circuit of FIG. 3, the terminal 98
Is connected to the camera head unit 2 via the signal cable 30.
0 is connected to the terminal 78, and similarly, the terminal 99 is connected to the terminal 79 via the signal cable 30, the terminal 100 is connected to the terminal 80, the terminal 101 is connected to the terminal 81, and the terminal 97 is connected to the terminal 77. ing. The signal from the camera head unit 20 may be transmitted serially, and the signal sent to the signal recording unit 40 in this case is converted into parallel.

The Y signal from the camera head section 20 transmitted to the terminal 98 is γ-corrected by the γ-correction circuit 102 and then transmitted to the encoder 104. The encoder 104 is also supplied with the γ-corrected signal through the vertical aperture correction circuit 103. Further, the encoder 104 also converts the R, G, B signals from the camera head unit 20 supplied to the terminal 99 into color difference signals of RY and BY in the chroma processing circuit 108. Supplied. The chroma processing circuit 108 is controlled by the control circuit 120, and the chroma processing circuit 108 reads R from the chroma processing circuit 108.
The C and BC signals are also output, and these signals are sent to the control circuit 120.

The encoder 104 is connected to the terminal 100.
The output from this encoder 104 is supplied to a recording head (that is, a magnetic head) for a magnetic floppy disk via a modulation circuit 105 for performing pre-emphasis and signal modulation and a REC amplifier 106. It is sent to the above-mentioned recording means) 107 for recording the image signal. The encoder 104, the modulation circuit 105, and the like serve as conversion means for converting the image signal into a recording signal. Recording on a magnetic floppy disk is performed by the magnetic head 107.

The output from the encoder 104 is also sent to the external output terminal 122. The external output terminal 122 is connected to the monitor 50 via the signal cable 31.
Connected with. Therefore, it becomes possible to observe the image captured by the camera head section 20 on the monitor 50.

As described above, since a microphone can be provided in the camera head section 20 of this embodiment, the sound from the microphone 121 shown in FIG.
It is also transmitted to 0. The audio signal from the microphone 121 is passed through the AGCNR circuit 117 that performs automatic gain control and noise reduction processing, and the time compression circuit 11 of the audio signal processing system of the signal recording unit 40 of the present embodiment.
8, the audio control circuit 119, the pre-emphasis circuit 116, etc., and further the modulation circuit 1
Sent to the REC amplifier 106 and the magnetic head 1
It is recorded on the magnetic floppy disk via 07. The REC amplifier 106 is controlled by the control circuit 120, and the control signal from the control circuit 120 and the output of the time compression circuit 118 are controlled by a signal via the OR gate 109.

Further, the control circuit 120 controls the spindle driver 110 which drives the spindle motor 111 of the magnetic floppy disk drive mechanism. The spindle driver 110 is the FG 112.
Spindle servo circuit 11 that operates according to the signal from
By operating based on the signal from 3, spindle servo is applied. The signal from PG115 is PG
It is sent to the control circuit 120 via the shaper 114.

In the still image recording system of this embodiment, the lens system 10 of the camera head section 20 is replaceable, and, for example, as shown in FIG. 4, an endoscope adapter (TV adapter with finder). If the 131 or the TV adapter 132 is provided, the fiberscope 134 and the optical tube 135 can be attached, and it can be used as an image quality recording apparatus for endoscopes. In the case where the above is attached, a light source is secured by the light source device 136. Further, it is possible to record the signal sent to the monitor 50 as it is on the VTR (video tape recorder) 130.

Although it is different from the still image recording system, it is conceivable that the camera head is a general TV camera as an image recording apparatus in which the camera head section and the signal recording section are separated, but in this case. However, it is only possible to capture images in field units, not in frame units using a high-speed shutter. On the other hand, according to the still image recording system of the present embodiment, the camera head unit 2
Since 0 has the shutters 13 and 14,
It is possible to capture and record images in frame units.

As described above, according to the still image recording system of this embodiment, the lens system 10 and the motors 21 and 21 are used.
Optical system including 2, 23, etc., and CCD 16 and C for Y signal
A camera head unit 20 having a signal CCD 15 and shutters 13 and 14, a magnetic floppy disk for recording an image signal, an encoder 104, a modulation circuit 105 and the like and a magnetic head 107 for recording a recording signal on the magnetic floppy disk. The signal recording unit 40 has
Since the camera head unit 20 and the signal recording unit 40 are connected by the signal cable 30, the camera head unit 20 can be reduced in size and weight and installed in various positions. Can easily replace the magnetic floppy disk and the battery, and
It is also possible to remotely operate the camera head unit 20. Furthermore, it is possible to capture and record images in frame units, and it is possible to obtain high-quality images.

[0028]

As described above, in the still image recording system of the present invention, a camera head portion having at least an optical system, a solid-state image pickup device for converting incident light into an electric signal, and a shutter for taking out an image in frame units. A signal recording unit having a recording medium for recording the image signal taken out in frame units, a conversion unit for converting the image signal into a recording signal for recording the image signal on the recording medium, and a recording unit for recording the recording signal on the recording medium. Since the camera head section and the signal recording section are connected by a signal cable, the camera head section can be made compact and lightweight and can be installed at various positions. The recording medium and the battery can be easily replaced, and the camera head can be operated remotely. Furthermore, it is possible to capture and record images in frame units and obtain high quality images.

[Brief description of drawings]

FIG. 1 is a system diagram of a still image recording system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a camera head unit of the present embodiment.

FIG. 3 is a block diagram showing a circuit configuration of a signal recording unit of the present embodiment.

FIG. 4 is a system diagram when the still image recording system of the present embodiment is used as a high-quality recording device for an endoscope.

FIG. 5 is a diagram showing a conventional still image recording system.

[Explanation of symbols]

 10 ... Lens system 13,14 ... Shutter 15,16 ... CCD 20 ... Camera head part 21,22,23 ...・ ・ ・ ・ ・ Signal recording unit 50 ・ ・ ・ ・ ・ ・ Monitor

Claims (1)

[Claims] 1. A still image recording system for recording a still image signal on a recording medium, comprising at least an optical system, a solid-state image sensor for converting incident light into an electric signal, and a shutter for extracting an image in frame units. A camera head unit, a recording medium for recording the image signal taken out in the frame unit, a converting unit for converting the image signal into a recording signal for recording the recording signal on the recording medium, and recording the recording signal on the recording medium. A still image recording system, comprising: a signal recording unit having a recording means for performing the operation, and connecting the camera head unit and the signal recording unit with a signal cable.