JPH033580A - Electronic still camera - Google Patents

Abstract

PURPOSE:To set a consecutive shot reproduction speed of a reproduction device automatically by recording a coded consecutive shot speed data as part of an ID signal, decoding the ID signal at the reproducing device so as to obtain the consecutive shot speed data. CONSTITUTION:When a video floppy disk 51 is loaded, a magnetic head 55 reproduces a 1st track and an ID signal is demodulated by an ID signal reproducing circuit 65 via a low pass filter 62 and becomes a digital signal. The signal is synchronous with a timing signal from a timing signal generating circuit 69 at an ID decoding circuit 70 to extract a data recorded by an electronic still camera, stored in a consecutive shot speed register 71 and inputted to a system control 72. When a consecutive shot speed reproduction switch 79 of an operation section 73 is turned on, a stepping motor 56 is operated at a speed based on the recorded data and the reproduced picture is being revised. Thus, the frame feed speed is set automatically to the consecutive shot speed at recording.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a continuous shooting function of an electronic still camera that records video signals on a video floppy disk with a diameter of approximately 2 inches.

2. Description of the Related Art Electronic still cameras have been increasingly commercialized in recent years, and one of their features is a continuous shooting function. In other words, conventional video floppy playback devices capable of high-speed continuous copying of 15 to 20 images per second and playing back discs recorded in this manner select the frame advance speed during playback by operating an input switch button on the playback device. It is the composition.

FIG. 4 shows a conventional example of an electronic still camera.

Reference numeral 101 denotes a lens section, which is composed of a lens, an aperture, a shutter, and the like. Reference numeral 102 denotes a CCD image sensor, and a subject image focused by a lens section is formed on this CCD image sensor and converted into an electrical signal.

107 is a synchronization signal generation circuit, which generates predetermined synchronization signals such as a vertical synchronization signal and a horizontal synchronization signal. 106 is CC
The D image sensor control/drive circuit generates various timing signals based on the synchronization signal to control and drive the CCD 102. 103 is an imaging circuit, which includes a CCD image sensor 102;
Generates a luminance signal and a color signal from the output signal. This circuit 103 further performs processing such as gamma correction, synchronization signal addition, and line sequentialization of color difference signals. Reference numeral 104 denotes an FM modulation circuit which performs FM modulation on two signals, a luminance signal and a color difference line sequential color signal outputted from the imaging circuit 103, respectively. 105 is a recording amplifier, 116 is a magnetic head, 115 is a video floppy disk, and 118 is a spindle motor that rotates at about 60 revolutions per second to rotate the video floppy disk 115. 117 is a stepping motor and a head moving mechanism,
The magnetic radar 116 is moved at intervals of 100 μm per track. 120 is a stepping motor control circuit;
19 is a stepping motor drive circuit, 122 is a spindle motor phase and speed control circuit, and 121 is a spindle motor drive circuit. Reference numeral 123 designates the operation unit of the electronic still camera, and includes several operation switches. For example, 124 is a shooting switch, 126 is a continuous shooting/single shooting mode switch, 125 is a continuous shooting speed changeover switch, and 127 is a continuous shooting speed switch. It is a date setting switch. 114 is a system control section, and based on the input from the operation section,
Generates a series of control signals that operate an electronic still camera. 111 is a date register, 112 is a continuous shooting speed register, and 113 is a track number register. Data in these registers is displayed on an LCD 129 through an LCD display/driver circuit 128. Reference numeral 110 denotes an ID signal generating section that generates an ID signal in accordance with the ID signal format of an electronic still camera. 108 is an ID signal modulation circuit. Continuous shooting operation will be explained using the above configuration. The continuous shooting/single shooting mode switch 126 is set to the continuous shooting side, and the continuous shooting speed changeover switch 125 is used to set the number of continuous shots per second. - For example, one sheet per second each time the switch 125 is pressed;
Snapshot speeds can be switched between 5 and 15 images. When an unrecorded video floppy disk 115 is loaded into an electronic still camera with a setting of 5 frames per second, the magnetic head 116 is moved to the first track position by a stepping motor 117.

The display on LCD 129 is continuous shooting “5” and track number “1”.
becomes. Next, by turning on the photographing switch 124, the spindle motor 118 rotates, and after the rotation becomes stable, a continuous photographing operation is performed. As shown in FIG. 6, first, the shutter operates at a predetermined speed, and the formed image is read out from the CCD image sensor and recorded on a video floppy. Thereafter, the stepping motor moves the magnetic head by one track, and the track number display is also incremented. Continuous shooting is performed by repeating this process.

The format of the ID signal is shown in FIG. FIG. 5 shows a conventional example of a video floppy playback device for playing back images recorded by the above-mentioned electronic still camera. 151 is a video floppy disk, and 155 is a magnetic head that comes into contact with the disk and picks up information recorded on the disk. A head amplifier circuit 159 amplifies the minute signal picked up by the magnetic head 155. 152 is a spindle motor that moves the video floppy disk 151 at approximately 60 speeds per second.
Rotate. 154 is a spindle motor control circuit;
53 is a spindle motor drive circuit. 156
is a stepping motor and a head moving mechanism, and 158
157 is a stepping motor control circuit, and 157 is a stepping motor drive circuit. 160 is a bypass filter that extracts a luminance component from the reproduced signal of the video floppy disk 151; 161 is a band pass filter that extracts a color signal component; and 162 is a low pass filter that extracts an ID signal. 1
63 is a luminance signal processing circuit, 164 is a color signal processing circuit, 1
65 is an ID signal reproducing circuit, 166 is a mixing circuit that mixes the reproduced luminance signal and color signal and converts the mixture into a composite video signal, and 167 is a video output terminal. 168 is a sync separation circuit which separates and extracts a sync signal from a luminance signal to which a sync signal is added; 169
is a timing generation circuit that generates various timing signals for signal processing based on the synchronization signal. 170 is an ID decoding circuit which decodes the ID signal reproduced by the ID signal reproduction circuit 165, and reproduces field/frame distinction, date, etc. Reference numeral 173 denotes an operation unit, which is composed of switches for operating the video floppy playback device. As an example of the switches, 174 is an FWD.
Switch to send the head inside, 175 is RE
The V switch is a switch that sends the head to the outside, 176 is an automatic feed switch that moves the head in a track at fixed time intervals, 177 is an automatic feed UP switch,
Reference numeral 178 denotes an automatic feed DOWN switch, which shortens or lengthens the automatic feed time interval, and increases/decreases the frame feed speed.

Reference numeral 172 denotes a system control, which is a circuit that controls the operation of the playback device using a switch from the operation section. In the above configuration, continuous frame-by-frame playback will be explained.

When the video floppy disk 151 is loaded into a reproducing apparatus, the spindle motor 152 rotates under the control of the system control circuit 172, the stepping motor 156 operates, and the magnetic head 155 reproduces the first track. Automatic feed UP switch 177 of operation unit 173
The automatic feed speed is set using the automatic feed DOWN switch 178. -For example, the automatic feed speed is per frame (sheet),
8, 4, 2.1.115.1/10°1/15 (each unit is seconds), and 1/15 seconds per frame reproduces 15 screens per second. When the automatic feed speed is set to 115, which is the same as the continuous shooting speed of 5 frames per second recorded by the electronic still camera, and the automatic feed switch 176 is turned on, the system control circuit 172 moves the magnetic head to the video floppy disk at a rate of 5 tracks per second. (Stepping motor control circuit 158)
A control pulse is output from.

Problems to be Solved by the Invention As described above, in the conventional electronic still camera, when playing back a video floppy disk recorded with continuous shooting, it was necessary to set the frame advance speed using a switch on the operating section.

The object of the present invention is to automatically set this frame feed speed to the continuous shooting speed during recording.

Means for Solving the Problems To achieve this object, the electronic still camera of the present invention stores the continuous shooting speed output from the system control in a part of the user's area of the ID signal to record the data of the fast shooting speed. The present invention has a structure in which a coding means for coding data in a register and an ID signal generating means are connected.

On the other hand, the playback device has a structure in which a continuous shooting speed decoding means for decoding the value of the quick shooting speed from the ID signal and a continuous shooting playback switch are added to the playback device equipped with a continuous frame advance function.

Operation The present invention uses the above-described configuration to automatically match the frame feed speed of the video 70-tab playback device to the continuous shooting speed of the electronic still camera during recording.

Embodiments Below, electronic still cameras and video floppy playback devices according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of an electronic still camera.

1 is a lens section, 2 is a CCD image pickup device, 7 is a synchronization signal generation circuit, 6 is a CCD image pickup device control drive circuit, 3 is an image pickup circuit, 4 is an FM modulation circuit, 5 is a recording amplifier, 16 is a magnetic head, 15 is a A video floppy disk, 18 is a spindle motor, 17 is a stepping motor and head moving mechanism, 23 is an operation unit, 24 is a shooting switch, 26 is a continuous shooting/single shooting mode switch, 25 is a continuous shooting speed changeover switch,
27 is a date setting switch. 14 is a system control unit, 11 is a date register, 12 is a continuous shooting speed register, 13 is a track number register, and 28 is an LCD display.
The driver circuit 29 is an LCD, and the configuration thereof is the same as that of the conventional example. 30 is a coding circuit. The loading of the disk, the operation method of the operation unit, the CCD image sensor, the spindle motor, the stepping motor, etc. are the same as those of the conventional example, and this embodiment records continuous shooting speed data as part of the ID signal, which is a feature of the present invention. will be explained based on the above configuration.

As in the conventional example, each time the continuous shooting speed changeover switch 25 is pressed, the continuous shooting speed is changed to, for example, 1, 5, or 15 images per second. This switch is connected to the system control and its data is stored in the continuous shooting speed register 12.

This register has a 2-bit configuration, and in the case of one card per second......"01" 〃5 no I......"10" 〃15 〃 ......"11" . The LCD display/driver circuit 28 outputs the above register output to a 2-digit, 7-segment LCD (liquid crystal).
Conversion is performed to display "1", "5", and "j5", respectively, and the LCD is driven.

The structure of the ID signal will be explained with reference to FIG. The ID signal is divided into a part determined by the format and a user area. "F/f" indicates whether it is field recording or frame recording and is composed of 2 bits, "Track Arashi" indicates the track number from 1 to 50 and is composed of 7 bits,
The "year, month, and day" is composed of 19 bits.

Continuous shooting speed data is recorded in the user area and has an 8-bit configuration. The first 5 bits are an identification code that means that continuous shooting speed data follows in a fixed pattern, and the last 3 bits are a fixed pattern.
Bits indicate continuous shooting speed.

The encoding circuit 30 converts the data in the continuous shooting speed register 12 into 3
This circuit converts the data into bit continuous shooting speed data and adds a 5-bit identification code (10001 in FIG. 3). I
The D signal generation circuit 10 is a 37-bit parallel-in/serial-out shift register, "F/f" is connected to the system control section 14, and "year, month, day" is connected to the date register 11.
and continuous shooting speed are connected to the encoding circuit 30. A load pulse for loading data into the 37-bit shift register and a clock for outputting data at a predetermined timing are input from the synchronization signal generation circuit 7. Note that the number of bits in the shift register of the ID signal generation circuit 10 can be reduced by dividing the number of times data is loaded into a plurality of times.

Next, reproduction of a video floppy disk recorded in the above manner will be explained with reference to FIG.

51 is a video floppy disk, 55 is a magnetic head, 5
9 is a head amplifier, 52 is a spindle motor, 55 is a stepping motor and head moving mechanism, 63 is a brightness signal processing circuit, 64 is a color signal processing circuit, 65 is an ID signal reproducing circuit, 66 is a mixing circuit, and 67 is a video output terminal. It is. 6
8 is a synchronization separation circuit, 69 is a timing generation circuit, 70 is an ID decoding circuit, 73 is an operation unit, and switches 74 are FWD switch, 75 is a REV switch, 76 is an automatic feed switch, 77 is an automatic feed UP switch, 78 72 is a system control unit, and 71 is a continuous shooting number register.

When the video 70 disc 51 is loaded, the spindle motor 52 rotates under the control of the system control circuit 72, the stepping motor 56 operates, and the magnetic head 55 reproduces the first track. The ID signal that has passed through the low-pass filter 62 is demodulated by an ID signal reproducing circuit and becomes a digital signal. This signal is sent to the ID decoding circuit 70.
By synchronizing with the timing signal of the timing signal generation circuit 69, "F/
f″ “Year, month, day” and “Continuous shooting speed” data can be extracted, “F/f” and “Year, month, day” are input to the system control 72, and from then on, predetermined control is performed. The first 5 bits of the 8-bit data identify the continuous shooting speed data, and the following 3 bits determine the continuous shooting speed. This data is stored in the continuous shooting speed register 71 and input to the system control 72. Operation. When the continuous shooting playback switch 79 of the section 73 is turned on, this is input to the system control 72, which operates the stepping motor 56 at a speed based on the data in the continuous shooting speed register 71 to move the track and reproduce the reproduced image. I will update it.

To end this continuous shooting reproduction, the continuous shooting reproduction switch 79 is turned on again, or another switch such as the FWD switch 74 is turned on.

Effects of the Invention In an electronic still camera, coded continuous shooting speed data is recorded as part of an ID signal, and a playback device records this I
By decoding the D signal and obtaining continuous shooting speed data, the continuous shooting playback speed of the playback device can be automatically set.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic still camera in an embodiment of the present invention, FIG. 2 is a block diagram of a video floppy playback device in an embodiment of the present invention, and FIG. 3 is a format diagram of 10 signals in an embodiment of the present invention. , FIG. 4 is a block diagram of a conventional electronic still camera, FIG. 5 is a block diagram of a conventional video floppy playback device, FIG. 6 is a flowchart showing continuous shooting operation, and FIG. 7 is a format diagram of an ID signal. . 10...ID signal generation circuit, 12.71...
... Continuous shooting speed register, 14.72 ... System control, 30 ... Coding circuit, 7
0...ID decoding circuit, 79...Continuous shooting playback switch.

Claims (1)

[Claims] An electronic still camera equipped with a continuous shooting means, an ID signal generating means, and a recording means, comprising a means for encoding a continuous shooting speed value per unit time, and a means for connecting the encoding means and the ID signal generating means. An electronic still camera characterized by recording continuous shooting speed as part of an ID signal.