JPH0646796B2 - Recording / playback device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a recording / reproducing apparatus configured to display an image to be recorded and an image after recording using the same display device.

[Prior art]

In general, as this type of device, a recording / reproducing system in which a video camera equipped with an electronic viewfinder and a VTR are connected is well known. In other words, this system is very convenient because the reproduced image obtained by reproducing the image signal recorded on the tape is displayed on the electronic viewfinder so that the photographing result can be confirmed on the spot without using any other display device. Further, as a matter of course, when the VTR is connected to the television receiver, or when the both are integrated, confirmation of the image to be recorded and confirmation of the recorded image are performed in the television receiver. Display device, ie CR
It can be done by T. By the way, recently, a still image electronic camera has been proposed in which a video signal from an image pickup device such as a CCD is recorded on a recording medium such as a magnetic disk. Even if such an electronic camera is used, it is very convenient if the recorded result can be confirmed on the spot without using any other display device by displaying the recorded image on the electronic viewfinder of the camera. Is.

As described above, as the method of confirming the photographing result by the electronic view finder, the following operation is considered.

For example, it is considered that after the recording is completed, the camera is manually switched to the reproduction mode, the reproduction track of the magnetic disk is designated and reproduction is performed, and the reproduction signal at this time is given to the electronic viewfinder. This is far from the request to view the shooting result as soon as possible after the shooting and without any troublesome operation.

In addition, a still picture recording / reproducing apparatus using such a magnetic disk or the like is connected to a television receiver, or integrated with this to record a television signal received by the television receiver on the magnetic disc or the like. The same thing can be said for a system which reproduces this and displays it on the CRT of the television receiver.

Therefore, it is also considered that the recording mode is automatically switched to the reproducing mode immediately after the recording is completed once, and the recorded image is reproduced for a predetermined time. However, if you want to perform continuous shooting, switching to the playback mode immediately after the end of recording once becomes an obstacle, and if you want to perform long playback or short playback. For example, although the reproduction time required for the convenience of the user is various, it is very difficult for the user to always reproduce the reproduction for a fixed time. As described above, each device has various problems in terms of operability.

〔Purpose〕

The present invention has been made in view of the above problems, and in a recording / reproducing apparatus configured to display an image to be recorded and an image after recording using the same display device,
By recording the image to be recorded and reproducing the recorded image according to the ON / OFF state of each stage of the two-stage switch, the user can freely record the image with an extremely simple operation. It is an object of the present invention to obtain a recording / playback apparatus which can be played back and has high operability.

〔Example〕

First, as a first embodiment of the present invention, an example in which the present invention is applied to a still picture recording / reproducing apparatus provided in a still picture electronic camera will be described with reference to FIGS. 1 to 4.

In the figure, 1 is a first switch that is turned on by the first stroke of the two-step stroke release button, and sends a high level ON signal as shown in FIG. 2 (a), and 2 is the second stroke of this release button. The second switch 3 which is turned on at the same time and sends out a high level ON signal as shown in FIG. 2B is a falling sync type RS flip-flop, the reset input R of which is connected to the first input via an inverter 4. Switch 1 is connected, and the second input 2 is connected to the set input S. Reference numeral 6 is an image pickup device composed of a CCD or the like, and 7 is an image pickup device drive circuit, which drives the image pickup device 6 in response to a signal from the first switch 1. Reference numeral 8 denotes an image pickup signal processing circuit for subjecting the image pickup signal obtained by the image pickup device 6 to predetermined processing, and the processed video signal and
The vertical synchronizing signal V _D as shown in (a) is transmitted. Reference numeral 9 is a recording processing circuit for converting the video signal from the imaging signal processing circuit 8 into a form capable of being recorded on the magnetic disk 14, 10 is a recording amplifier for amplifying the signal output from the recording processing circuit 9, and 11 is It is a gate control circuit that controls the gate stage of the recording amplifier 10. The ON signal of the second switch 2 and the vertical synchronizing signal V _D are input to the gate control circuit 11.
A signal as shown in FIG. 2C is output to the gate stage of the recording amplifier 10 in response to these signals, and the recording signal is output from the recording amplifier 10 while this signal is being output. Reference numeral 12 is a first signal switching circuit as signal switching means for selectively connecting the terminal c to the terminals a and b in accordance with the low and high levels of the Q output of the RS flipflop 3, and 13 is the recording of the signal on the magnetic disk 14. Alternatively, a magnetic head for reproducing the recorded signal is connected to the terminal c of the first signal switching circuit 12. 29 is the OF of the first switch 1
In response to F, the head moving mechanism moves the head 13 to the next recording position on the disk 14. A reproducing amplifier 15 amplifies the signal reproduced by the magnetic head 13. The reproduction amplifier 15 and the recording amplifier 10 are connected to the terminals b and a of the first signal switching circuit 12, respectively. 1
Reference numeral 6 is a reproduction processing circuit for reproducing the signal output from the reproduction amplifier 15, 17 is a display processing circuit for performing a display processing of the signal output from the reproduction processing circuit 16, and 18 is a Q of the RS flip-flop 3.
A second signal switching circuit as a signal switching means for selectively connecting the terminal f to d and e according to the output low and high,
The video signal output of the imaging signal processing circuit 8 is attached to the terminal d, and the output of the display processing circuit 17 is attached to the terminal e. Reference numeral 19 is an electronic viewfinder drive circuit connected to the terminal f of the second signal switching circuit 18, and drives the electronic viewfinder 20 as a display device in response to an ON signal from the first switch 1.

The gate control circuit 11 is constructed as shown in FIG. In the figure, F1, F2 and F3 are falling edge type D flip flops. Of these, a high level signal is given to the D input of the first-stage flip-flop F1 and the second switch 2 is connected to the clock input CP via the inverter IV. The flip-flop F2 of the second stage is a flip-flop F whose D input is the previous stage.
The vertical synchronizing signal V _D sent from the image pickup signal processing circuit 8 is input to the clock input CP of FIG. Third stage flip-flop F3
Has its D input connected to the Q output of the flip-flop F2 in the second stage, and the vertical synchronizing signal V _D is input to the clock input CP as in the previous stage. In addition, the clear signal CLR generated when the first switch 1 is ON is applied to the reset inputs R ₁ , R ₂ and R 3 of each of the flip-flops F 1, F 2 and F 3.
Input to ₃ . G is an AND circuit for sending the AND output of the Q output of the second flip-flop F2 and the output of the third flip-flop F3. From the inverter IV, the flip-flops F1, F2, F3 and the AND circuit G, the ON signal of the second switch 2 and the vertical synchronizing signal V _D which are inputted are shown in FIG.
A signal as shown in (f) is transmitted. The signal output from the AND circuit G is input to the gate stage of the recording amplifier 10 so that the recording amplifier 10 outputs a recording signal for one field.

In the above configuration, when the release button is pressed and the first switch 1 is turned on in the first stroke, the image pickup device drive circuit 7 drives the image pickup device 1 and the field drive circuit 19 drives the electronic viewfinder 20. Also,
At the same time, since the output of the inverter 4 changes from high level to low level, the RS flip-flop 3 is reset and its Q output is fixed at low level. As a result, the terminal c of the first signal switching circuit 12 is connected to the terminal a, and the terminal f of the second switching circuit 18 is connected to the terminal e, so that the camera enters the recording mode. Therefore, the image sensor 6
The image incident on is converted into an image pickup signal, and then supplied to the electronic viewfinder drive circuit 19 via the image pickup signal processing circuit 8 and the second switching circuit 18, whereby the image to be recorded is changed to the electronic viewfinder 20. Is projected on.

Next, press the release button further and press the second switch 2
When is turned on, this ON signal and image pickup signal processing circuit 8
The gate control circuit 11 sends the signal shown in FIG. 4 (f) to the gate stage of the recording amplifier 10 in response to the vertical synchronizing signal V _D. While this signal is being sent (1/60 second), the recording amplifier 10 outputs the video signal output from the recording processing circuit 9. The video signal sent from the recording amplifier 10 is applied to the magnetic head 13 via the first switching circuit 12 and recorded on the magnetic disk 14 through the head 13.

Here, when the released release button is returned to the original position and the second switch 2 is turned off, the falling signal causes R
S flip-flop 3 is set and its Q output goes high. As a result, the first switching circuit 12 has the terminal a.
And c is switched to the connection between terminals b and c, and the second switching circuit 18 is also switched from the connection between terminals d and f to the connection between terminals e and f to enter the reproduction mode. Therefore, the signal recorded on the magnetic disk 14 by the above-described operation is reproduced by the magnetic head 13, and then passes through the reproduction amplifier 15, the reproduction processing circuit 16 and the display processing circuit 17 to be transmitted from the second signal switching circuit 18 to the commander. It is sent to the drive circuit 19 and a reproduced image is displayed on the electronic viewfinder 20.

After that, when the release button is further returned by one step and the first switch 1 is also turned off, the image pickup element drive circuit 7 and the field drive circuit 19 are turned off. Then, in response to the trailing signal at this time, the head moving mechanism 29 is operated to move the magnetic head 13 to the next recording position on the magnetic disk 14.

Next, as a second embodiment of the present invention, an example in which the present invention is applied to a still picture recording / reproducing apparatus connected to or integrated with a television receiver will be described with reference to FIG. . The same or corresponding parts as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, 21 is a tuner circuit, 22 is an intermediate frequency amplifier circuit for amplifying the intermediate frequency signal supplied from the tuner circuit 21, 23 is a video detection circuit for extracting a television signal, and 24 is a signal from the video detection circuit 23. A video amplifier circuit that amplifies and separates the vertical synchronizing signal V _D.
The separated vertical synchronizing signal V _D is applied to the gate control circuit 11
Entered in. 26 is a signal processing circuit for demodulating color signals, 27 is a CRT drive circuit, and 28 is a CRT. Here, the inverter 4 is not necessary and the reset input R of the RS flip-flop 3 is directly connected to the first switch 1.

In the above configuration, the signal from the tuner circuit 21 passes through the intermediate frequency amplifier circuit 22 and the detector circuit 23, and then the video amplifier circuit 24 separates the vertical synchronizing signal V _D. Then, the vertical synchronizing signal V _D is input to the gate control circuit 11. Further, the video signal is sent to the second signal switching circuit 18 via the signal processing circuit 26. At this time, since the Q output of the RS flip-flop 3 is at a low level, the terminal f of the second signal switching circuit 18 is connected to d. Therefore, the signal from the signal processing circuit 26 passes through the second switching circuit 18. Are supplied to the CRT drive circuit 27, and the television image being broadcast is displayed on the CRT 28. The first
In the signal switching circuit 12, terminals a and c are connected.

Here, while watching the image being broadcast on the CRT 28, press the two-stage stroke recording / playback button,
When the second switch 2 is turned on in the second stroke (the first switch 1 is also turned on at this time, turning on the first switch does not cause any change). A high level ON signal is input to the gate control circuit 11 as in the first embodiment.
The recording amplifier 10 is controlled by the signal transmitted from the recording amplifier 10. Therefore, the signal from the recording processing circuit 9 is supplied to the recording amplifier 10 and the first switching circuit 1 in which the terminals a and c are connected.
2 to the magnetic head 13 and the magnetic disk 14
Recorded in.

After that, when the recording / reproducing button is returned to the original position and the second switch 2 is turned off, the RS flip-flop 3 is set and its Q output becomes high. As a result, the terminal c of the first switching circuit 12 is switched to the connection with the terminal d, and the terminal f of the second switching circuit 18 is switched to the connection with the terminal e. Therefore, the video signal recorded on the magnetic disk 14 is sent from the magnetic head 13 to the CRT drive circuit 27 through the reproduction amplifier 15, the reproduction processing circuit 16, the display processing circuit 17 and the second switching circuit 18, and is sent to the CRT 28. The reproduced image is displayed.

After confirming that the playback image is the intended image, move the recording / playback switch back one step and set the first switch 1 to OF.
When F, the RS flip-flop 3 is reset by the falling signal and the Q output becomes low level. As a result, the first switching circuit 12 is switched to the connection between the terminals c and a, the second switching circuit 18 is switched to the connection between the terminals f and d, and the television broadcast image is again projected from the CRT 28. Further, the head moving mechanism 29 moves the magnetic head 13 to the next recording position on the magnetic disk 14.

In the above-mentioned first and second embodiments, the recording / playback is operated by the two-stage switch. However, in addition to the two-stage switch, a playback-only operation member may be added. Therefore, even when the second switch is continuously pressed to continuously record the image, no trouble occurs in reproducing the image.

As an example, the present invention is applied to a still picture recording / reproducing apparatus for recording / reproducing a still picture using a magnetic disk. In this case, the record carrier is, for example, a magnetic drum. It can be anything. Furthermore, the present invention can be applied to a recording / reproducing system including a combination of a video camera and a VTR or a television receiver and a VTR as described at the beginning, and in that case, the same effect can be obtained.

[Effect]

As described above, according to the present invention, in the recording / reproducing apparatus provided with the image to be recorded and the electronic viewfinder for displaying the reproduced image reproduced from the recording medium, the operation member is pressed and released once. It is possible to switch the series of operation modes of input image monitor during recording, recording, reproduction, and recording standby by changing the stroke of the operation member, and the operator surely recognizes each operation mode transition. You can do it while.

That is, it is possible to reproduce the image just recorded by pressing the operation member to the second step to perform recording and then releasing only the second step.
The recorded image can be confirmed immediately after recording, and the reproduction time can be any time before the pressing of the first step is released.

In addition, the operator can switch between the monitor image and the reproduced image at the time of recording only by the stroke of the operation member, while surely recognizing the operation by himself / herself.

[Brief description of drawings]

FIG. 1 is a block diagram showing the first embodiment of the present invention, and FIG.
The figure shows the ON / OFF signal of the first switch and the second switch and the signal from the gate control circuit in each mode of the one shown in FIG. 1. The figure (a) shows the ON / OFF signal of the first switch. , (B) is ON / O of the second switch
The FF signal, and FIG. 6C shows the signal from the gate control circuit. FIG. 3 is a circuit diagram showing a specific example of the gate control circuit shown in FIG. 1, and FIG. 4 is a diagram showing input / output signals of main circuit parts in the circuit shown in FIG. (A) is the vertical sync signal, (b) is the output of the inverter IV, and (b) is the same.
(C) shows the Q output of the flip-flop F1, (d) shows the Q output of the flip-flop F2, (e) shows the output of the flip-flop F3, and (f) shows the output of the AND circuit G. FIG. 5 is a block diagram showing the second embodiment of the present invention. 1 …… First switch forming a two-stage switch, 2 …… 2
Second switch constituting a multi-stage switch, 12 ... First switching circuit as switching means, 14 ... Magnetic sheet as recording medium, 18 ... Second switching circuit as switching means, 20.
...... Electronic viewfinder as display device, 28 ……
CRT as a display device

Claims (1)

[Claims] 1. A first and a second switch which are sequentially operated by a single operating member, a recording means for recording an input video signal on a recording medium, and a video signal recorded on the recording medium. Reproducing means for reproducing, an electronic viewfinder for displaying an input video signal to be recorded on the recording medium and a reproduced signal for reproducing the video signal recorded on the recording medium, and by operating the operation member, Only the first switch is O
The input video signal is displayed on the electronic viewfinder by turning on the N switch, and the recording means is operated by turning on the second switch while the first switch is turned on. A signal is recorded on the recording medium, and then only the second switch is turned on.
By performing FF, the reproducing means is operated to reproduce the video signal recorded immediately before and displayed on the electronic viewfinder, and in addition to turning off the second switch, further turning off the first switch. A recording / reproducing apparatus comprising: a control unit that enables the next recording.