JPS6123482A - Electronic camera device - Google Patents

Abstract

PURPOSE:To decrease the number of connecting lines between a recording device and a reproducing device of an electronic camera by allowing an electronic camera reproducing device to generate a new ID signal, and apply modulation thereto, multiplexing it to a modulation signal of a video signal and transmitting the result to the recording device. CONSTITUTION:In the electronic camera reproducing device, as to a track number requiring data change, a changeover switch 53 is thrown to the termianal (b) and a data demodulating the ID signal from the recording device (not shown) is fetched to an ID generating circuit 48. As to year/month/day data where no data change is required, the switch 53 is thrown to the position (a) to fetch the data when the ID signal of the magnetic disc 43 is fetched to the circuit 48. When a new ID signal is generated in such a way, the signal is modulated by a modulation circuit 46, subject to frequency multiplex to an FM modulation signal for the luminance signal and chrominance signal by a mixing circuit 47, transmitted to the recording device via a re-recording signal output terminal 56 and recorded on a magnetic disc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic camera device comprising an electronic camera recording device and an electronic camera playback device.

The configuration of a conventional example and its problems A conventional electronic camera recording device will be explained with reference to FIG. The subject image focused by the lens (1) passes through the shutter and the diaphragm (2) and forms an image on the image sensor (3).
The luminance signal processing circuit (4) converts the luminance signal into a luminance signal with a synchronization signal added, and the color signal processing circuit (5) converts it into a color signal with sequential color difference lines, which are then sent to the FM modulation circuits (6) and (7), respectively. FM modulated. The spectrum of the FM wave is as shown in Figure 2, and the brightness signal is set at F so that the sinter lap is at f3 and the white peak is at f4.
The carrier frequency is f
The two waves are frequency-multiplexed by a mixing circuit (8), amplified by a recording amplifier circuit (9), and supplied to the head (10) as a recording current.

The synchronization generating circuit (11) generates a scanning signal for imaging, a synchronization signal to be added to the luminance signal, a reference signal for controlling the rotation of the disk motor (12), and a reference signal for generating an ID signal. . The head (10) has a head moving mechanism (1
3), video signals are concentrically recorded on a magnetic disk (14) that moves along the radial direction on the magnetic disk (14) and is rotated by a disk motor (12). The head moving mechanism (13) detects the starting edge detection section (13) when loading a magnetic disk or turning on the power.
The head is initialized to a predetermined position in step 15), and is thereafter moved to the track specified by the operation section (16) by pulses from the head feed pulse generation circuit (17). The ID signal is a data signal indicating the date of image capture, track number, etc., and is a digital signal clocked by a horizontal synchronization signal. For example, if 1 bit is 4TH (T is 1 horizontal scanning period = approximately 63.5u). , record one field 1
The track data amount is approximately 60 bits. Of these, 8 bits are used to indicate the track number, and 24 bits are used to indicate the year, month, and day.
Bits are assigned, modulated, and multiplexed with the video signal in the low frequency region indicated by f□ in FIG.

The track number is reset by the detection signal of the start edge detection section (15) and is assigned the output of a counter (18) whose clock is the head feed pulse, and the date is determined by the data of the date generation section (19). An ID signal of a predetermined format is generated from an ID generation circuit (20).

Note that (21) is a motor control circuit, and (22) is a system control section.

Next, a conventional electronic camera playback device will be explained with reference to FIG. The recorded magnetic disk (14) is connected to the motor control port i1 (24) so that the servo based on the approximately 607 vertical synchronization signal of the reference signal generation circuit (23) is applied.
The disk motor (25) controlled by
It is rotated at the frequency of the TV field. The signals recorded on the magnetic disk (14) are transferred to the head moving mechanism (2).
6) is picked up by the head (27) fixed to
It is amplified by a head amplifier (28).

The amplified signals are HP F (29) and B P F
(30) and LPF (31) separate and extract the FM signal of the luminance signal, the FM signal of the color signal, and the modulation signal of the ID signal.

The luminance signal reproducing circuit (32) performs processing such as FM demodulation, de-emphasis, amplification, and delay, and reproduces the luminance signal. The color signal reproducing circuit (33) performs FM demodulation, de-emphasis, amplification, synchronization of line-sequential color difference signals, etc., and the color signal component subjected to quadrature two-phase modulation is reproduced by the color encoder (34). On the other hand, the ID signal is processed by the ID demodulation circuit (
35), and based on this data, a pattern generation circuit (36) generates characters in order to display the year, month, date, etc. at a predetermined position on the television screen. A synthesis circuit (37
) and output it as a video signal to the video output terminal (38).
The image is output from the camera and displayed on a television receiver or the like.

However, the electronic camera recording device shown in FIG.
It is a separate body from the electronic camera playback device shown in the figure, and in the above-mentioned conventional electronic camera device, the image on the magnetic disk (14) played back by the electronic camera playback device is transferred to another magnetic disk (14).
4) When re-recording, there is a problem in that there are many connection lines for exchanging signals between the electronic camera recording device and the electronic camera playback device. In other words, when changing the track number of an ID signal using an electronic camera playback device, the types of signals required for re-recording are a luminance signal, a color signal, and a changed ID signal from the electronic camera playback device to the electronic camera recording device. From the electronic camera recording device to the electronic camera playback device, there is a new track number (serial signal) to be changed and a synchronization signal for timing this serial signal.Although the direction does not matter, the electronic camera recording Disc motor (12) (2) of the device and electronic camera playback device
5) A total of six types of reference signals are required for controlling the disk motor for synchronization. Note that the advantage of changing the ID using the electronic camera playback device is that the electronic camera recording device can be made smaller.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and an object thereof is to provide an electronic camera device that can reduce the number of connection lines between an electronic camera recording device and an electronic camera playback device.

Structure of the Invention In order to achieve the above object, an electronic camera device of the present invention comprises:
an electronic camera recording device that has an imaging function and a recording function and records still images concentrically on a magnetic disk; an electronic camera playback device that reproduces signals recorded on the magnetic disk to obtain a television signal; a first output terminal installed in the electronic camera playback device to which a signal obtained by frequency modulating the playback signal of the magnetic disk is supplied; and a first output terminal installed in the electronic camera recording device to which the signal from the first output terminal is inputted. a first input terminal installed in the electronic camera recording device and supplied with a signal obtained by multiplexing an ID signal with a signal obtained by frequency modulating a video signal including at least a synchronization signal; a second input terminal that is installed in the playback device and receives a signal from the second output terminal; and a second input terminal that is installed in the electronic camera playback device and receives the playback signal from the magnetic disk from the second output terminal. □tx, g
J*. 4.1 ID generation means installed to obtain track number data from the multiplexed signal and date data from the reproduction signal of the magnetic disk to generate a new ID signal; multiplexing means installed in the electronic camera playback device for multiplexing a new ID signal from the ID generation device onto the signal supplied to the first output terminal; When re-recording the reproduction signal of the disk onto the second magnetic disk by the electronic camera recording device, the disk motors of both the electronic camera recording device and the electronic camera reproducing device are controlled based on the synchronization signal of the electronic camera recording device. In addition to obtaining synchronization, the system records information such as the date and the track number of the magnetic disk on which the video is recorded by frequency multiplexing it onto the video signal as an ID signal.

That is, the present invention transmits a synchronization signal from an electronic camera recording device in the form of a brightness signal to an electronic camera playback device, and the electronic camera playback device receives this brightness signal, synchronously separates it, and then records it at a predetermined timing. By generating and controlling a reference signal for motor control, the electronic camera playback device and the electronic camera recording device are synchronized. Regarding the ID signal, the modulated wave of the ID signal is frequency-multiplexed from the electronic camera recording device to the FM modulated signal of the luminance signal including the synchronization signal, and transmitted to the electronic camera playback device. demodulates the ID signal of the reproduced signal and the ID signal of the multiplexed signal from the electronic camera recording device, and data such as the date that is not changed from the reproduced signal of the magnetic disk, and data that is changed from the ID signal of the electronic camera recording device. Obtain data such as the track number for each track number, and create a new ID.
After the signal is generated and modulated, it is multiplexed with the modulated signal of the video signal and transmitted to an electronic camera recording device for recording.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a circuit block diagram of an electronic camera recording device of an electronic camera device according to an embodiment of the present invention, FIG. 5 is a circuit block diagram of an electronic camera playback device of the electronic camera device, and FIGS. Components that are the same as those shown in are given the same reference numerals and their explanations will be omitted. In FIG. 4, (39) is a second magnetic disk, (40) is a changeover switch, (4I) is a re-recording signal input terminal, and (42) is a multiplex signal output terminal. In Figure 5, (43) is the first
magnetic disk, (44) and (45) are FM modulation circuits,
(46) is a modulation circuit, (47) is a mixing circuit, (48) is an ID generation circuit, (49) is a synchronous separation circuit, (50) is an amplifier circuit, (51) is an FM demodulation circuit, (52) is an HPF ,
(53) (54) are changeover switches that switch in conjunction with each other, (55) is a changeover switch, (56) is a re-recording signal output terminal, (57) is a multiplex signal input terminal, and (58) is a synchronous separation circuit. be.

The recording signal of the first magnetic disk (43) is transmitted to the head (2).
7), and the luminance signal and color signal are reproduced in the same manner as described in the conventional example. These two signals are converted into FM modulation signals by the respective FM modulation circuits (44) (, 45), frequency-multiplexed by the mixing circuit (47), and then output from the re-recording signal output terminal (56). The signal is input to the re-recording signal input terminal (41) of the camera recording device. The changeover switch (40) is a switch for switching between using the electronic camera recording device as a normal imaging/recording device or as a recording device for re-recording. In the latter case, switch to terminal (b). The signal selected by the changeover switch (40) is amplified by the recording amplifier circuit (9), supplied to the head (10) as a recording current, and recorded on the second magnetic disk (39). The electronic camera recording device has an image sensor (3), a lens (1), a shutter, and an aperture (2), and captures a subject image. When the shutter is closed, the output signal of the luminance signal processing circuit (4) has almost no video signal component,
Most of it is the synchronization signal component added. There are also almost no color signal components output from the color signal processing circuit (5). I
The ID signal generated from the D generation circuit (20) becomes predetermined data such as date, track number, etc. That is, the track number is the number of the recording track on the second magnetic disk (39), and the date becomes the data of the date generation unit (19) of the electronic camera recording device when re-recording. The luminance signal, which is the synchronization signal component, is converted into an FM modulation circuit (6).
The FM modulated signal, the FM modulated color signal in the FM modulation circuit (7), and the modulated ID signal are subjected to frequency polymorphism in the mixing circuit (8), and are outputted from the multiplexed signal output terminal (42).

Next, control of the disk motor (25) in the electronic camera playback device will be explained. The signal from the multiplex signal input terminal (57) connected to the multiplex signal output terminal (42) is a signal obtained by FM modulating the synchronizing signal as described above, and 1. This is a mixed signal with a signal obtained by modulating the D signal.

This multiplexed signal is band-limited in the HP F (52) and a luminance FM signal is extracted, the amplitude is limited in the FM demodulation circuit (51) and then FM demodulated, and the amplifier circuit (50) de-emphasizes and amplifies it. After that, the synchronization separation circuit (49
), the waveform is shaped and the vertical synchronization signal is extracted. The changeover switch (55) is switched to terminal (a) during normal playback and to terminal (b) during rerecording. At the time of re-recording, the reference signal to the motor control circuit (24) is the above-mentioned vertical synchronization signal obtained by reproducing the multiplexed signal from the electronic camera recording device by the synchronization separation circuit (49), etc. (12) The synchronization generation circuit (
11), and the recording/reproducing disk motors (12) and (25) rotate in synchronization.

Next, changing the ID signal will be explained. ID demodulation circuit (
The signal input to 35) is switched between the reproduction signal of the first magnetic disk (43) and the multiplexed signal from the electronic camera recording device by the changeover switch (53).
The magnetic disk (43) is 1 TV field (approximately 17
It rotates once every 60 seconds), and can read all the data for one track in 1/60 seconds. Furthermore, the ID signal from the electronic camera recording device is also 1/60 second synchronized repeatedly. Therefore, the changeover switch (53) normally has a terminal (
a), and the first magnetic disk (43)
However, during the re-recording period, it is switched to terminal (b) for at least 1760 seconds, and the ID signal of the electronic camera recording device is passed. L P F (
31) is for extracting an ID signal from among the three multiplexed signals, and is demodulated into a baseband signal by an ID demodulation circuit (35). At this time, the timing signal for ID reading is obtained from the synchronization signal, but the changeover switch (53)
A changeover switch (54) interlocked with the sync signal separated from the reproduction signal of the first magnetic disk (43) by the sync separation circuit (58) and a sync signal separated from the electronic camera recording device, that is, the sync separation circuit (49) ) output and select one. The TD generation circuit (48) includes an ID demodulation circuit (
The necessary data is extracted from the output signal of 35) and a new ID signal is generated. That is, for the track number for which data needs to be changed, the selector switch (53) is switched to the terminal (b), and the data that is demodulating the ID signal from the electronic camera recording device is transferred to the ID generation circuit (48). ). Also, for data on dates that do not need to be changed, the changeover switch (53) is switched to terminal (a), and the data when demodulating the ID signal of the first magnetic disk (43) is transferred. ID generation circuit (
48). As described above, a new ID signal is generated, this signal is modulated by the modulation circuit (46), and mixed into the FM modulation signal of the luminance signal and color signal by the mixing circuit (47).
frequency multiplexed on the second magnetic disk (3
9) is re-recorded.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, six types of signals necessary for re-recording are transmitted from the electronic camera recording device to the electronic camera playback device, and from the electronic camera playback device to the electronic camera recording device. The data can be transmitted through two connection lines, one for the re-recording signal and one for the re-recording signal, and the configuration can be simplified and costs can be reduced. Furthermore, the multiplexed signal transmitted from the electronic camera recording device to the electronic camera reproducing device is in the same form as the signal recorded on the magnetic disk, and does not need to be newly generated.

[Brief explanation of the drawing]

Figure 1 is a circuit block diagram of a conventional electronic camera recording device.
FIG. 2 is an explanatory diagram of frequency spectra of frequency-modulated luminance signals and color signals, FIG. 3 is a circuit block diagram of a conventional electronic camera playback device, and FIG. 4 is an illustration of an electronic camera device according to an embodiment of the present invention. FIG. 5 is a circuit block diagram of the electronic camera recording device. FIG. 5 is a circuit block diagram of the electronic camera reproducing device of the electronic camera device. (39)...Second magnetic disk, (41)...Rerecording signal = 15-

Claims (1)

[Claims] 1. An electronic camera recording device that has an imaging function and a recording function and records still images concentrically on a magnetic disk; and an electronic camera playback device that reproduces signals recorded on the magnetic disk to obtain television signals; a first output terminal installed in the electronic camera playback device to which a frequency-modulated signal of a magnetic disk playback signal is supplied; and a signal inputted from the first output terminal installed in the electronic camera recording device. a first input terminal installed in the electronic camera recording device and supplied with a signal obtained by multiplexing an ID signal with a signal obtained by frequency modulating a video signal including at least a synchronization signal.
a second input terminal installed in the electronic camera playback device to which the signal from the second output terminal is input; and a second input terminal installed in the electronic camera playback device to input the signal from the magnetic disk and the second input terminal. a switching means for selecting one of the multiplexed signals inputted from a second output terminal through a second input terminal; and a switching means installed in the electronic camera playback device to obtain track number data from the multiplexed signal. and the date data is obtained from the reproduction signal of the magnetic disk and a new I
ID generating means for generating a D signal, and multiplexing means installed in the electronic camera playback device for multiplexing a new ID signal from the ID generating means onto the signal supplied to the first output terminal, When re-recording the reproduction signal of the first magnetic disk by the electronic camera reproducing device onto the second magnetic disk by the electronic camera recording device, the electronic camera recording device and the electronic An electronic camera device configured to synchronize both disk motors with the camera playback device and to frequency-multiplex and record the date and track number of the magnetic disk on which the video is recorded as an ID signal on the video signal. .