JPH0352181A - Recording/playback device - Google Patents

Abstract

PURPOSE:To facilitate an operation for confirming a photographed image by providing a control means for actuating a reproducing means while a recording designation means is in a prescribed state and reproducing the image which is recorded just before. CONSTITUTION:After a photographed image signal by an image pickup circuit is recorded on the track of a magnetic disk 10 where a magnetic head 12 is positioned, a host control circuit 42 examines whether it is a consecutive photographing mode or not by a single/consecutive photographing switch 54 when a recording switch 50 keeps being on. When it is not the consecutive photographing mode, a control signal E2 is made low and power supply to the image pickup circuit is interrupted and a switch 31 is connected to a contact (a) to make the control signals E3 and E4 high, so that power is supplied to a reproducing amplifier 22 and a reproducing signal processing circuit 34. Thus, the reproduced video signal of the image which is recorded just before is outputted from a reproduced video output terminal. Therefore, the recorded image is quickly confirmed because the recorded image is automatically repro duced by keeping the recording switch 50 in an on-state after performing record ing in the single recording mode.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an image signal recording and reproducing device.

[Prior Art] An example of the above-mentioned recording/reproducing device is an electronic still camera, which records data on a small magnetic disk called a still video floppy specified by the Still Video Council. Use as a medium. Electronic still cameras function exclusively as image recording devices that record desired images on a recording medium, and the original or common usage is to use a reproduction-only device to reproduce the captured images. However, now you can check the captured image on the spot.
Some also have playback functions.

[Problems to be Solved by the Invention] However, in conventional examples, the recording mode for recording images on a recording medium and the playback mode for reproducing recorded images on the recording medium are strictly classified in terms of use, and the captured image If you want to immediately play and check something, it is extremely difficult to use.

Therefore, it is an object of the present invention to provide a recording/reproducing device that can provide good operability even in such a case.

[Means for Solving the Problems] A recording and reproducing apparatus according to the present invention includes a recording means for recording an input image signal on a recording medium, a reproducing means for reproducing a recorded image on the recording medium, and an instruction to operate the recording means. a control means for operating the recording means in accordance with the recording instruction means and operating the reproduction means while the recording instruction means is in a predetermined state to reproduce the image recorded immediately before; It is characterized by consisting of.

[Effect] Therefore, there is no need to perform the troublesome operation of switching to playback mode in order to check recorded images.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of an embodiment of the present invention. 1
0 is a magnetic disk having 50 tracks numbered from 1 to 50 in order from the outermost circumference, 12 is a magnetic head for recording and reproducing, 14 is a motor for rotating the magnetic disk 10, 1
6 is a servo circuit that controls the rotation speed of the motor 14 to a predetermined value; 18 is a head moving mechanism that moves the magnetic head 12 in the radial direction of the magnetic disk 10 to position it on a designated track; and 20 is a drive for the head moving mechanism. 22 is an innermost detection switch that is turned on when the magnetic head 12 is located on the innermost track; 24 is a disk detection switch that detects that the magnetic disk 10 is set.

26 is an imaging circuit that converts the optical image produced by the optical system 27 into an electrical signal; 28 is an imaging circuit that performs recording signal processing such as gamma correction and FM modulation on the output signal of the imaging circuit 26 to make it suitable for recording on the magnetic disk 10; A recording signal processing circuit 30 converts the signal into a recording amplifier. 31 is a changeover switch that connects to the A contact during playback and the C contact during recording; the B contact indicates that it is not connected to either the A or C contact. 32 is a reproduction amplifier, and 34 is a reproduction signal processing circuit that performs reproduction signal processing such as 8 demodulation on the output of the reproduction amplifier 32 and outputs a reproduction video signal. 38 is a detection circuit that performs envelope detection of the output of the reproducing amplifier 32; 40 is a detection circuit 3;
This is a comparison circuit that compares the output voltage of No. 8 with a predetermined reference voltage.

42 is a control circuit for controlling each of the circuits described above, 44 is a switch for instructing track up, and 46 is a switch for instructing track down. 48 is a switch that instructs preparation for recording operation, and 50 is a switch that instructs execution of recording operation. By pushing one push switch, switch 48 is first turned on, and when it is pressed further, switch 50 is turned on. configured to be in the state. Reference numeral 52 denotes a switch for specifying the recording/reproduction mode, which is connected to the a contact in the recording mode and to the b contact in the reproduction mode. Reference numeral 54 designates a switch for specifying single imaging (S) or continuous imaging (C), and 56 is a power switch for turning on the power to the apparatus.

58 is a DC power source consisting of a battery or an AC adapter; 60;
62, 64, 66, and 68 are regulators that form the power supply voltage necessary for each part of the circuit from the output voltage of the power supply 58, and control signals El, E2, E3, and
E4 and switch 56 control on/off of the output. The regulator 60 is connected to the recording amplifier 30 and the recording signal processing circuit 28, and the regulator 62 is connected to the imaging circuit 26.
The regulator 64 supplies power to the reproduced signal processing circuit 34, the regulator 66 supplies power to the detection circuit 38 and the comparison circuit 40, respectively, and the regulator 68 supplies the voltage for switch state detection to the switches 44 to 5 via pull-up resistors.
4 to supply operating power to the servo circuit 16 and control circuit 42.

The operation shown in FIG. 1 will be explained. The power switch 56 has a power supply 5.
The output voltage of 8 is directly applied, and the power switch 56
When turned on, the regulator 68 detects it and supplies the power supply voltage Vcc5 to the servo circuit 16 and the control circuit 42, and also switches the switches 44 to 5 through the pull-up resistor.
4. The operation will be described below with reference to the flowcharts shown in FIGS. 2, 3, and 4. When the power switch 56 is turned on (Sl), power is supplied to the control circuit 42 as described above. At this point, control signals E1-E4 are all low, and regulators 60-6
6 is inactive. The control circuit 42 learns that the magnetic disk 10 is loaded by the disk detection switch 24 (S2), and operates the servo circuit 16 to detect the magnetic disk 10.
0 at a predetermined speed (S3). Next, the innermost circumference detection switch 22 checks whether the magnetic head 12 is located at the 50th track, which is the innermost circumference track (S4).
The magnetic head 12 is moved inward until it is located on the innermost track (S5).

When the magnetic head 12 is positioned at the innermost track, the switch 31 is connected to the a contact and the control signal E4 is turned on (S6). When the control signal E4 is turned on, power is supplied from the regulator 66 to the regenerative amplifier 32, the detection circuit 38, and the comparison circuit 40. The reproduction output of the track is then supplied to the detection circuit 38 via the reproduction amplifier 32, and the comparison circuit 40 compares the output of the detection circuit 38 with a predetermined reference level. Based on this comparison result, it can be determined whether the data has been recorded or not. If it is not already recorded, the magnetic head 12 is moved one track at a time until a recorded track is found (S7) or the first track is reached (S8).
(S9).

When a recorded track is found (S7), the control circuit 4
2 checks whether or not it is in the recording mode using the record/playback mode switch 52 (SIO), and if it is not in the recording mode, proceeds to S8; if it is in the recording mode, checks whether it is the 50th track or not (Sll); If it is 50 tracks, the servo circuit 16 is turned off to stop the magnetic disk 10, and the control signal E4 is set to low to put the regulator 66 into a non-operating state (S13). If it is not the 50th track (S11),
After one track up, the servo circuit 16 is turned off, the control signal E4 is set low to put the regulator 66 in a non-operating state (S12), and the process proceeds to S14.

If it is the first track in S8, and after the process in S12, it is checked whether or not it is in the recording mode (S14), and if it is not in the recording mode, the control signal E3 is set high, the regulator 64 is activated, and the key waits for human power. Become (515).

When the regulator 64 operates, the video signal processing circuit 34 operates, and a reproduced video signal is output. On the other hand,
If you are in recording mode, it will just wait for you to do it alone (
S16).

As explained above, when the magnetic disk 10 is loaded and is in the recording mode, tracks are fed from the innermost track toward the outer circumference while determining whether or not recording has been completed.
The magnetic head 12 is positioned on one of the innermost recorded tracks and an unrecorded track on the innermost side, and the key waits for manual input. If the 50th track has been recorded, the operation in the recording mode ends. In the case of playback mode, the tracks are fed in order from the innermost track, the magnetic head 12 is positioned on the first track, and the signal played from the first track is sent from the playback video output terminal to the main T key. Waiting for manpower.

Next, the actual recording operation will be explained. 516 to 3 in Figure 3
17, it is checked whether the mode is recording mode or not (517), and if it is not the recording mode, the servo circuit 16 is activated and the control signal E2 is used to deactivate the regulator 62 (S31). Proceed to step 36 to enter playback mode.

On the other hand, in the recording mode, when the recording preparation switch 48 is turned on (Sl8), the servo circuit 16 is activated to rotate the magnetic disk 10, and the control signal E2 is set to high to activate the imaging circuit 26 (S! 9). Then, by turning on the recording switch 50, the control signal E1 is set to high and the recording signal processing circuit 28 and the recording amplifier 30 are activated (S21
), the switch 31 is connected to the contact point C during the IV period, and the photographed image signal by the imaging circuit 26 is recorded on the track where the magnetic head 12 is located (S22). After that, the control signal E
When l is low, the recording signal processing circuit 28 and the recording amplifier 3
0 (S23).

If the recording switch 50 remains on (S24), the S
/C switch 54 is used to check whether continuous shooting mode is selected (S2
5) If it is not the continuous shooting mode, use the control signal E2 to cut off the power supply to the imaging circuit 26, and set the switch 31 to a.
The control signals E3 and E4 are connected to the contacts and the control signals E3 and E4 are set high so that power is supplied to the reproduction amplifier 22 and the reproduction signal processing circuit 34 (326). As a result, the reproduced video signal of the image recorded immediately before is output from the reproduced video output terminal.

Then, the process returns to S24.

When the recording switch 50 is off (S24) or when the recording switch 50 is on and the continuous shooting mode is on (S25), the control signals E3 and E4 are set low to supply power to the playback amplifier 32 and the playback signal processing circuit 34. If the current track is not the 50th rack, the process moves up by one track (S29) and proceeds to S17. If the current track is the 50th track, the control signal E2 is set low to power the imaging circuit 26. is cut off (S30), the process proceeds to S13 in FIG. 2, and the process ends.

As can be seen from S24 to S29 in FIG. 3, if the recording switch 50 is kept in the ON state even after recording is performed, if the mode is not a snapshot mode, the mode will automatically switch to the playback mode, and the image recorded immediately before will be played back and output. In the case of continuous shooting mode, the magnetic head 12 is moved toward the inner circumferential side and sequentially records captured images until the 50th track is reached.

Next, the operation following the key manual power wait (S15) in the reproduction mode will be explained. Proceeding from S15 to S40 in FIG. 4, it is first checked whether or not it is in the playback mode (S40), and if it is not in the playback mode, the control signal E3. E4 is set low to cut off power to the reproduction amplifier 32 and reproduction signal processing circuit 34 (S49),
Proceed to 84 in FIG. In the case of playback mode (S40), check the up switch 44 and down switch 46 (
S41.42), the up switch 44 is on and the fifth
If the 0 track is not reached (S46), the magnetic head 12 is moved to the inner circumferential side of one track (S47), and the up/down
When the switch 44 is turned off, the process returns to S40. down·
When the switch 42 is on and the first track is not set (S43), the magnetic head 1 is placed on the outer circumferential side of one track.
2 is moved (S44), and when the down switch 46 is turned off (S45), the process returns to 840. If both the up switch 44 and the down switch 46 are not on, the process returns to S4G.

In this embodiment, since the power supply is finely controlled by the control signals E1 to E4 in each of the recording mode and the reproduction mode, power consumption can be reduced and power can be used efficiently.

Although a magnetic disk was used as the recording medium in this embodiment, the present invention is not limited to this, and solid-state memories such as magnetic tapes, optical disks, magneto-optical disks, and semiconductor memories may also be used.

[Effects of the Invention] As can be easily understood from the above explanation, according to the present invention, after recording in the single recording mode, by keeping the recording switch on, the recorded image can be automatically reproduced. This makes it possible to quickly check recorded images.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the structure of an embodiment of the present invention, FIG.
FIGS. 3 and 4 are flowcharts of the operation. 42: Main control circuit 44: Up switch 46: Down switch 48: Recording preparation switch 50: Recording switch 52: Recording/playback mode switch 54: Single/continuous shooting switch 60, 62, 64, 66, 68: Regulator Fig. 1 Fig. 2 Fig. 3

Claims (1)

[Claims] A recording means for recording an input image signal on a recording medium, a reproduction means for reproducing a recorded image on the recording medium, a recording instruction means for instructing the operation of the recording means, and an operation of the recording means in accordance with the recording instruction means. 1. A recording and reproducing apparatus comprising: a control means for operating the reproducing means and reproducing the image recorded immediately before while the recording instructing means is in a predetermined state.