JP2537187B2 - Recording or playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a recording or reproducing apparatus, and more particularly to a control apparatus for controlling the operating period of the apparatus.

<Prior Art> In a conventional recording or reproducing apparatus, either a recording medium or a recording head is rotated to change a relative position to perform recording or reproducing, for example, a rotating drum provided with a head. There are known VTRs for recording or reproducing with a magnetic tape, and still video cameras for recording or reproducing with a rotating magnetic sheet and a magnetic head.

In such a recording or reproducing device, in order to control the rotation, a means for generating a first signal every time the rotation reaches a predetermined phase, a so-called PG pulse, and a phase comparison with a reference signal are performed to make the rotation speed constant. Controlled to be.

<Problems to be Solved by the Invention> By the way, in the above-described recording or reproducing apparatus, for example, various kinds of setting for reproducing time for reproducing a signal recorded on a recording medium or recording timing for recording a signal on the recording medium However, since a timer circuit for exclusive use is provided as such a timer to control the above-mentioned timing, there is a problem that the structure becomes complicated by the provision of the timer circuit for exclusive use.

<Means for Solving Problems> The present invention has been made to solve the above-mentioned conventional problems, and recording or reproduction is performed by rotating either the recording medium or the recording head to change the relative position. Recording / reproducing means for performing, first generating means for generating a first signal each time the rotation has a predetermined phase, reference signal generating means for generating a reference signal for controlling the rotation, and the rotation Means for selectively setting a first operation mode for starting and stopping every predetermined period and recording or reproducing for every predetermined period and a second operation mode for continuously recording or reproducing the rotation; First control means for controlling the rotation by comparing the phases of a first signal and the reference signal;
A recording or reproducing apparatus comprising: a second control unit that controls the operation of the recording and reproducing unit by counting the reference signal in the first operation mode.
Is provided.

<Operation> In the first operation mode in which rotation is started / stopped every predetermined period and recording or reproduction is performed at each predetermined period, a reference signal whose phase is compared with that of the first signal for rotation control is set. By counting the predetermined period by counting, the recording or reproducing period in the recording / reproducing means is controlled.

<Example> Hereinafter, the present invention will be described in detail with reference to the drawings. In an example of the present invention described below, a still image video signal is recorded on a disc-shaped recording medium, specifically, a disc-shaped magnetic sheet. A recording / reproducing apparatus for reproducing a recorded or recorded still image video signal will be described.

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a recording / reproducing track of a video signal and a magnetic sheet on which a track pitch and a position of the track are determined in advance. The track is formed concentrically, and one field is provided with a video signal of one field. In the case of a recorded frame video signal, a video signal of one field is recorded on each of two adjacent tracks to become a frame video signal. 2 is a DC for rotating the magnetic sheet 1 at a constant speed
Motors, 3-1 and 3-2 are in-line type heads that access two adjacent tracks, 3-1 is the outer peripheral side,
3-2 accesses the inner week side. 4 is a magnetic head 3-1
A magnetic head moving mechanism 5 for moving 3-2 so as to access the track formed on the magnetic sheet 1 is a magnetic head moving mechanism 4 for allowing the magnetic head 3-2 to access the innermost track on the magnetic sheet 1. When it does, the state switches from OFF to ON, and the innermost circumference detection switch that outputs an L level signal to a micro computer (hereinafter referred to as CPU) 40, which will be described later, 6 is detected by magnetic heads 3-1 and 3-2. A reproduction amplifier for amplifying the reproduced signal, 7 a level detector for detecting the average value of the output signal from the reproduction amplifier 6, 8
Is a comparator for detecting whether the output of the level detector 7 is higher than a threshold value set by a reference voltage source (not shown),
9 is a demodulation circuit for demodulating the output signal of the reproduction amplifier 6, and 10 is
A 1 / 2H delay circuit that delays the output of the demodulation circuit 9 for a 1/2 horizontal scanning period (hereinafter referred to as 1 / 2H), 11 is a synchronization signal such as a horizontal synchronization signal Hsync or a vertical synchronization signal Vsync from the output of the demodulation circuit 9. Sync signal separation circuit for separating the
It is a data demodulator that detects a predetermined data signal from the output of the reproduction amplifier 6 according to the timing of the sync signal separated from 11, and demodulates the data signal. The data signal is recorded in a frequency band lower than that of the video signal at a position having a predetermined relationship with the portion where the track synchronization signal is recorded. The reason why the demodulation circuit 9 and the data demodulation circuit 12 are provided separately is as follows. That is, the video signal recorded on the magnetic sheet 1 is FM-modulated, but the data signal other than the video signal adopts a DPSK modulation method (Defferatial Phase Shft Keying) different from FM modulation.
Therefore, the demodulation circuit 9 described above is an FM demodulation circuit, and the data demodulation circuit 12 is a DPSK demodulation circuit.

Reference numeral 13 denotes a monitor for reproducing and observing a video signal, and 13 'denotes a printer connected to print the video signal. The operation of the printer 13 'is started when the signal of the start signal input terminal goes high, and the busy signal output terminal goes low during operation. Reference numeral 14 denotes data output from a CPU 40, which will be described later, as opposed to the data demodulator 12.
Hs which is a modulator for PSK modulation and is separated from a video signal input from a video input terminal 18 by a synchronization signal separation circuit 17
The data modulated at the timing corresponding to ync and Vsync is output to the recording amplifier 16.

Reference numeral 15 is a recording amplifier for processing the video signal input from the video signal input terminal 18 for recording such as FM modulation and outputting the processed signal to the recording amplifier 16. Reference numeral 19 is a reference signal generator, which generates an accurate reference pulse (60 Hz) for rotating the magnetic sheet 1.

Reference numeral 20 denotes a magnetic piece provided on the magnetic sheet 1 described above, which is synchronized with a reference signal generated by a reference signal generator 19 using a signal from the magnetic piece 20 as described later.
The rotation control of the DC motor 2 is performed. 21 is magnetic sheet 1
A PG coil for detecting a signal from the magnetic piece 20 when rotated by the DC motor 2.

Reference numeral 22 denotes a waveform shaping circuit for shaping the waveform of a signal output from the PG coil 21. The output of the waveform shaping circuit 22 is input to a CPU 40 and a motor control circuit 23, which will be described later.

Reference numeral 23 denotes a control circuit for controlling the rotation of the DC motor 2, which outputs Vsync from the sync signal separation circuit 17 or the output signal of the reference signal generator 19 and the output of the waveform shaping circuit 22, that is, on the magnetic sheet 1. The rotation of the DC motor 2 is controlled so that the phase relationship with the signal from the magnetic piece provided on the DC motor 2 is in a predetermined relationship, for example, the phase of the two is always shifted by 7H. Here, when the recording operation is performed by the magnetic heads 3-1 and 3-2, SW1 is switched to the side of the sync signal separation circuit 17 in advance, and Vsync and the signal input from the waveform shaping circuit 22, that is, the magnetic sheet 1 When the rotation of the DC motor 2 is controlled based on the signal from the magnetic piece 20 provided above and the reproducing operation is performed by the magnetic heads 3-1, 3-2, SW1 is the reference signal generator 19 side. The DC motor 2 is rotated based on the reference signal from the reference signal generator 19 and the signal input from the waveform shaping circuit 22, that is, the signal from the magnetic piece 20 provided on the magnetic sheet 1. Is controlled.

23 'is a head 3 based on a signal from a CPU 40 described later.
A driver for driving a step motor 24 for controlling the positions of -1, 3-2. The step motor 24 moves the heads 3-1 and 3-2 via the head moving mechanism 4.

Reference numeral 25 'is a display circuit driven by a signal from the CPU 40. As a display element, as shown in FIG. 3 which will be described later, heads 3-1, 3-2 are accessing track NO and head 3-. It is composed of a 7-segment display element for displaying the feed speed of 1, 3-2 in two digits, PB.LED for displaying the reproducing mode, and REC.LED for displaying the recording mode.

26 is a ROM that stores the CPU40 program, 27 is a CPU40
Is a RAM for temporarily storing the data. 28 is a timer driven by the CPU 40, and 29 is a crystal oscillator for generating a reference clock of the CPU 40. Reference numeral 80 denotes a detection circuit connected to photocouplers 81 and 82 constituting a detection switch for detecting whether or not the magnetic sheet 1 is inserted.

SW1 is a control circuit driven based on the signal from CPU40
A switch whose state is switched by the signal from 30
When the video signal is input from the video signal input terminal 18 and Hsync is output from the sync signal separation circuit 17, and when the signal indicating the recording mode is input from the CPU, the sync signal Separation circuit 17 and motor control circuit 23
When the sync signal separation circuit 17 does not output Hsync or the CPU 40 inputs a signal indicating that the mode is the reproduction mode, the reference signal generator 19 and the motor control circuit are connected.
Connect with 23.

SW2 is a switch that switches the state based on a signal from the CPU 40.
6. Switch to an intermediate state in which neither the reproduction amplifier 6 is connected.

SW3 is a switch whose state is switched based on a signal from the CPU 40 similarly to SW2, and the head 3-2 is a recording amplifier.
16 and the connection to the playback amplifier 6,
Switching between an intermediate state in which neither the recording amplifier 16 nor the reproducing amplifier 6 is connected.

SW4 is in the state of being switched to the upper side in FIG. 1 when reproducing the video signal from the magnetic sheet 1 and when reproducing the frame video signal by using the heads 3-1 and 3-2 together, that is, in the demodulation circuit 9. When the field video signal is reproduced by using only the head 3-1 in the connected state, it is switched to the upper side and the lower side in FIG. 1, that is, connected to the demodulation circuit 9. The switch is driven by the CPU 40 so that the state and the state connected to the 1 / 2H delay circuit are alternately switched for each field.

SW5 is a switch driven by the CPU 40 to connect the monitor 13 to the video signal input terminal 18 during recording and to connect the monitor 13 to SW4 during reproduction.

By the way, as described above, the video signal recorded on or reproduced from the magnetic sheet 1 may be a field video signal of only one field or a frame video signal composed of a pair of two fields. However, switching of the states of SW2, SW3, SW4, and SW5 in such a case will be described with reference to FIG.

FIG. 2 is a diagram showing combinations of switching states of SW2, SW3, SW4, and SW5.

In the field reproduction, SW2 connects head 3-1 to the reproduction amplifier 6, and switches SW3 to an intermediate state, that is, head 3-.
SW2 is connected to neither the reproducing amplifier 6 nor the recording amplifier 16, and SW4 outputs a signal directly from the demodulation circuit 9 to the monitor 13 in an odd field and to the monitor 13 via a 1 / 2H delay circuit 10 in an even field. The signal is alternately switched for each field so as to output a signal, thereby preventing the occurrence of skew distortion.

Next, in the frame reproduction, SW2 connects the head 3-1 to the reproduction amplifier 6 in the odd field, enters the intermediate state in the even field, SW3 enters the intermediate state in the odd field, and switches the head 3-2 in the even field to the reproduction amplifier 6. Connect to Therefore, at the time of frame reproduction, one of the heads 3-1 and 3-2 is alternately output to the reproduction amplifier 6 for each field.

In this case, the switch SW4 is switched to the upper side in FIG. 1, and the signal from the demodulation circuit 9 is directly output to the monitor 13.

Note that SW5 is driven so that the monitor 13 is connected to SW4 in any of the above-described field playback frame playback states.

Next, in the field recording, SW2 connects the head 3-1 to the recording app 16 and SW3 becomes the intermediate state.

Therefore, at the time of field recording, recording is performed by the head 3-1.

In frame recording, SW2 connects the head 3-1 to the recording amplifier 16 in the odd field, enters the intermediate state in the even field, SW3 enters the intermediate state in the odd field, and connects the head 3-2 to the recording amplifier 16 in the even field. Connecting. In frame recording, head 3
The combination of -1,3-2 can be reversed.

In both field recording and frame recording, SW5 connects the monitor 13 to the video signal input terminal 18 during recording.
Is switched so that the video signal to be recorded can be observed on the monitor 13. In such a case, SW4 may be in any state.

Next, the switches 51 to 63 and 72 shown in FIG. 1 will be described.

In making such a description, the appearance of the apparatus of this embodiment shown in FIGS. 3 to 4 will also be described.

FIG. 3 is a front view of the device of this embodiment, and FIG. 4 is a front view of a remote control device used in the device of this embodiment.

Switches 51 to 63 and 72 shown in FIG. 1 are switches provided in the device shown in FIG. 3, switches provided in the remote control device shown in FIG.
The switches shown in FIG. 3 and the remote control device shown in FIG. 4 are divided into switch groups. Switches having the same function are denoted by the same reference numerals in FIGS. 1 to 4. Is attached. The switch provided in the apparatus shown in FIG. 3, which is provided only in the remote control apparatus shown in FIG. 4 in FIG. 1, is connected to the CPU 40 via a line. The signal generated by operating the switch provided only in the remote control device shown in FIG. 4 is converted into infrared light by the remote control device. Third
Input is made to the CPU 40 of the device through a remote control light receiving unit 45 provided in the device.

It should be noted that various other modified examples of this embodiment can be considered as the method of arranging the switches 51 to 63 and 72, and the present invention is not limited to this embodiment.

In FIGS. 1 to 4, 41 is a power switch, 42 is a slot for inserting the magnetic sheet 1, and the slot 42
When the inject button 43 is turned on while the magnetic sheet 1 is inserted into the magnetic sheet 1, the magnetic sheet 1 is automatically opened and the magnetic sheet 1 is injected. 43 is the inject button, 44A, 44
B is the above-mentioned PB.LED, REC.LED, 45 is a remote control light receiving section for receiving a signal from the remote control device shown in FIG. 4, 46 is an interval mode display LED that lights up when the interval reproduction is set, 48 is a display LED that indicates whether field reproduction or recording, frame reproduction or recording is set, and 25 is the 2-digit 7 described above.
The segment LEDs 50A, 50B, and 50C are respectively a program reproduction setting switch 58, an interval time setting switch 57,
This is an LED that displays the operating state of the program track setting switch 62.

Reference numeral 51 is a REC mode switch for setting the recording mode and for confirming whether the track being accessed by the head in the recording mode has been recorded or not, and the head is accessed when the switch is turned on. If the track being recorded has already been recorded (when recording a field, the head 3
If the track accessed by -1 has already been recorded, or if one of the tracks accessed by heads 3-1 and 3-2 has already been recorded during frame recording, the REC.LED will blink. Indicates that the track the head is accessing is unrecordable, or REC.LED if not recorded.
Lights up to indicate that recording is possible.

Reference numeral 52 denotes an REC switch for determining a timing at which a recording operation is performed. This is a case where the recording mode is set by the REC mode setting switch 51. When the switch 51 is turned on, recording is performed on the magnetic sheet 1. . Further, when continuous recording is set in advance by a track feed speed setting switch 56 described later, continuous recording is automatically performed while the heads 3-1 and 3-2 are automatically shifted while the switch 51 is on. Will be

Reference numeral 53 is a PB mode setting switch for setting the reproduction mode, and when the switch 53 is turned on, the PB.LED indicating the reproduction mode is turned on.

Reference numeral 54 denotes a track UP switch. By operating the switch 54, the driver 23 'rotates the step motor 24, and the head moving mechanism 4 causes the heads 3-1 and 3-2 to move.
Is moved to shift the heads 3-1 and 3-2, and the track accessed by the head is changed to the inner circumferential direction. Also, when frame recording or playback is set by the field / frame setting switch 59, which will be described later, when the track UP switch 54 is turned on, the heads 3-1 and 3-2 are shifted by the track, and the 7-segment LED 25 is displayed. Also, the 1-track number shifted by 2 tracks is displayed instead of the 1-track shifted track number, and when track recording or playback is set, the track UP switch 54 is turned on and the head 3-1, 3-2 is shifted inward by one track, and the 7-segment LED 25 also displays the shift number shifted by one track.

When the recording mode is set and the heads 3-1 and 3-2 are shifted by operating the track UP switch 54, the tracks accessed by the heads 3-1 and 3-2 are recorded. If it has been completed, REC.RED44B blinks. The 55 is a head up 3-1 as opposed to the track UP switch 54.
This is a track DOWN switch for changing the access of 3-2 to the outer peripheral direction.

Like the switch 54, when the switch 55 is set to record or reproduce the frame, when the switch 55 is operated, the 7-segment LED 25 shifts by 2 tracks instead of by 1 track number. The selected track number is displayed, and when the switch 55 is operated when the field recording or reproduction is set, the track number shifted by one track is displayed.

Further, when the recording mode is set in advance similarly to the case of the track UP switch 54 described above, the head 3-1 and the head 3-1 are operated by operating the track DOWN switch 55.
If the track accessed when the 3-2 is shifted is already recorded, REC.RED44B blinks.

56 indicates whether to carry out such an operation when performing recording / reproducing automatically while continuously performing head-shifting, or switching to one-shot operation. When performing further continuously, how many operations per second are performed. This is a track feed speed setting switch for setting the indicated track feed speed.

When the switch 56 is pushed once and turned from on to off,
The track feed speed is displayed on the 7-segment LED 25 instead of the track number, and when the track feed speed setting switch 56 is turned on again within a predetermined time clock by the timer 28 shown in FIG.
Each time the switch 56 is turned on, the 7-segment LED 25 indicates that, for example, two screens are continuously recorded or reproduced in one second. Indicates continuous recording or playback of 5 screens per second Indicates continuous recording or playback of 10 screens per second Indicates that recording or playback is performed sporadically Is displayed cyclically. When the switch 56 is not turned on again after the track feed speed is displayed instead of the track number on the 7th segment LED 25 by turning on and off the switch 56, when the timer 28 completes the measurement of the predetermined time. The LED 25 returns from the state where the track feed speed is displayed to the state where the normal track number is displayed.

When the track feed speed is changed by the switch 56, when frame video recording is previously set by the field / frame setting switch 59 and the REC mode setting switch 51, continuous recording of 10 screens per second is not set. .

57 is an interval time setting switch. That is, the interval time setting switch for setting the interval time of the track feed in the case of performing the continuous reproduction but the interval reproduction in which the reproduction interval time is relatively long or the program reproduction is set by the program track setting switch 58 described later. And
Within 10 seconds after the switch is turned on, 63 to 72 shown in 10
Set the interval time with the key switch.

When the switches other than the 10-key switches 62 to 71 are turned on after the interval time setting switch 57 is turned on, the interval time setting is automatically canceled.
Reference numeral 58 is a program reproduction setting switch for setting the sequence of reproduction tracks in advance and setting a program reproduction mode in which the reproduction operation is continuously performed at the interval time interval set by the interval time setting switch 57.

To specify the order of the reproduction tracks, first, the program reproduction mode is set by turning on the switch 58, and then the tracks being accessed by the heads 3-1 and 3-2 are operated by operating the track UP switch 54 and the track DOWN switch 55. Play the video of the desired track by changing
By turning on a program track setting switch 62, which will be described later, while checking the number of the track, the number of the track checked on the monitor 13 is stored.
59 is the field / frame setting switch described above,
Each time the switch is turned on, the field recording or reproducing mode and the frame recording or reproducing mode are switched alternately.

If the REC mode setting switch 51 and the track feed speed setting switch 56 are set to the continuous recording mode of 10 screens per second in advance and the frame recording is selected by the field / frame setting switch 59, the track is selected. The feed speed is automatically changed to the continuous recording mode with 5 screens per second.

That is, 1 is greater in frame recording than in field recording.
Since the heads 3-1 and 3-2 must be shifted by 2 tracks each time, when recording 10 screens per second, a head shift of 20 tracks per second is required, but such a high-speed head shift is difficult. Therefore, it is 1 in this embodiment.
Continuous recording of frames for 10 screens per second is prohibited.

Reference numeral 60 denotes a start switch for performing interval continuous reproduction or program reproduction. When the start switch is turned on, when program reproduction is set, sequential reproduction is started from the first track and the interval time setting switch 57, Interval playback is started according to the interval time set by the numeric keypad switches 63 to 72, and program playback is started when program playback is set. 61 is a stop switch for stopping the reproduction operation started by the start switch 60,
When the switch 61 is turned on during the program reproduction, the track set at the beginning of the program is automatically reproduced.

 Reference numeral 62 denotes the aforementioned program track setting switch.

Next, the operation of the embodiment of the present invention will be described using the flow charts of FIGS.

First, when the power switch 41 shown in FIG. 3 is pushed in, the power supply of the apparatus shown in FIG. 1 is turned on, power is supplied to each part of the circuit, and the operation starts.

# 1: Then, the register IS which will be described later in FIG. 15 is reset to "0", the PB mode flag is set, the track feed speed is initialized to 2 screens per second, and the interval time is initialized to 3 seconds. Therefore, when the power is turned on, the continuous reproduction mode is automatically set in advance.

# 2: It is detected whether or not the jacket having the magnetic sheet 1 is pushed. When the jacket is pushed in, the flow branches to # 3. When the jacket is not pushed in, the flow jumps over # 3 and branches to # 4.

# 3: In # 2, the DC motor 3 is driven when the jacket having the magnetic sheet 1 is pushed in.

# 4: It is detected whether or not the heads 3-1 and 3-2 are accessing the 50th track by detecting whether or not the switch 5 shown in FIG. 1 is turned on, and the 50th track is detected. When the head is accessing, the flow branches to # 6, and when the head 3-1 is not accessing to the 50th track, the flow branches to # 5, and the step motor 24 shown in FIG. Drive the head 3-1 to repeat the loop of # 4 and # 5 so that the head 3-1 accesses the 50th track.

# 6: When the head 3-1 accesses the 50th track, the flow reaches this step, and in this step, the register N for accessing the memory (RAM 27) is set to 5
Set to 0.

# 7: In this step, it is detected whether or not the DC motor 2 is driven. When the jacket having the above-described magnetic sheet 1 is inserted, the DC is executed by executing # 3.
Since the motor 2 is being driven, the flow proceeds to step # 8.
Go to and set the field flag. When the jacket is not inserted, the DC motor 2 is not driven because the flow proceeds without going through the above-described # 3. Therefore, the flow is # 2 to detect whether or not a jacket is inserted.
Return.

# 8: At # 7, the field flag is set when the DC motor 4 is driven. Accordingly, the LED 44A indicating the field mode shown in FIG. 3 is turned on, and a display indicating the field is performed. That is, in this embodiment, when the power is turned on and the jacket is inserted, the field mode is automatically set.

# 9: The output of the level detection circuit 7 shown in FIG. 1 is detected to determine whether or not the track accessed by the head 3-1 is a recorded track. Here, since the track accessed by the head 3-1 has already been recorded, when the output of the level detection circuit 7 goes high, the flow proceeds to step # 10, and the output of the level detection circuit 7 goes low. If so, the flow proceeds to # 16.

 Here, # 16 will be described first.

# 16: “0000” is set to address N of the memory. Here, "0000" indicates that the track corresponding to the address of the memory has not been recorded.

 Next, the flow after # 10 will be described.

# 10: When the output of the level detection circuit 7 is at H level in # 9, the signal recorded in the track is reproduced and the ID signal is fetched from the data demodulator 12.

# 11: The content of the ID signal is detected to determine whether the video signal recorded on the track is a field video signal or a frame video signal. Here, if it is a field video signal, the flow proceeds to # 15, and if it is a frame video signal, the flow proceeds to # 12.

# 12: In this step, it is determined whether the video signal of the track accessed by the head 3-1 is an inner track or an outer track of the frame video signal. If it is an inner track, the flow proceeds to # 14. If it is the outer track, the flow proceeds to # 13.

# 13: If the video signal of the track accessed by the head 3-1 is a track outside the frame video signal, the address N of the memory is set to "0011". If you proceed from # 1 to this step for the first time, N is 50 in # 6.
Is set to

# 14: In the case of the inner track of the frame video signal, the address N of the memory is set to "0010".

# 17: Here, when it is detected that head 3-1 has been shifted to the first track and N = 1, the flow proceeds to # 20, and when N = 1, the flow proceeds to # 18.

# 18: When N = 1 is detected in # 17, the head 3-1 for one track is shifted to the outer peripheral side.

# 19: When the head 3-1 is shifted to the outer peripheral side in # 18, N is subtracted from N to obtain N.

# 20: When N = 1 is detected in # 17, that is, when the head 3-1 accesses the first track provided on the outermost periphery and the presence or absence of the recording is set in the memory, the memory 3-1 is used here. No. N, that is, when the data at the first address in the memory is read and is "0011". Specifically, when the first track is a track outside the two tracks constituting the frame video signal, the process proceeds to # 21. The flow proceeds, otherwise the flow proceeds to # 23.

# 21: If it is detected in # 20 that the first track is a track outside the track constituting the frame video signal, the flow proceeds to this step. In this step, when the data reading is “0010” at the address N + 1 of the memory, that is, the second address of the memory, specifically, when the second track is the inner track of the two tracks forming the frame video signal. Goes to # 22.

# 22: The flow shifts to this step when the frame video signal is recorded in two tracks, the first track and the second track. Therefore, the field flag set in # 8 is cleared, and the field mode is changed to the frame mode. Therefore, the field frame display LED 48 shown in FIG. 3 is an LED indicating that the frame mode is set.
Lights up.

# 23, # 24: The register N indicating the address of the above-mentioned memory is displayed on the two-digit 7-segment LED 25 shown in FIGS.

With this display, the user can recognize the number of the track accessed by the head 3-1.

When this flow ends, the flow jumps to the flow shown in A below. Hereinafter, the flowchart shown in FIG. 6 will be described.

# A-1: Detects whether the REC mode setting switch 51 is turned on, and when the switch 51 is turned on, the flow calls a subroutine to set the recording mode, and when it is not turned on, #A. -2.

# A-2: It is detected whether or not the REC switch 57 is turned on. When the switch 52 is turned on, a subroutine is called, and when it is not turned on, the process proceeds to # A-3.

# A-3: It is detected whether the PB mode setting switch 53 is turned on. If the switch 53 is turned on, a subroutine is called, and if not, the process proceeds to # A-4.

# A-4: When the track UP switch 54 is turned on, the flow calls a subroutine, and when it is not turned on, the process proceeds to # A-5.

# A-5: When the track DOWN switch 55 is turned on, the flow calls a subroutine, and when it is not turned on, proceeds to # A-6.

# A-6: When the track feed speed setting switch 56 is turned on, the flow calls a subroutine, and when it is not turned on, the flow proceeds to # A-7.

# A-7: When the interval time setting switch 57 is ON, the subroutine is called, and when it is not ON, the process proceeds to # A-8.

# A-8: When the program setting switch 58 is on, the subroutine is called, and when it is not on, the process proceeds to # A-9.

# A-9: When the program track setting switch 62 is ON, the subroutine is called, and when it is not ON, the process proceeds to # A-10.

# A-10: When the field frame setting switch 59 is on, the subroutine is called, and when it is not on, the process proceeds to # A-11.

# A-11: A subroutine is called when the start switch 60 is on, and #A when the start switch 60 is not on.
Proceed to -12.

# A-12: When the stop switch 61 is not turned on, the subroutine is called, and when the stop switch 61 is not turned on, #
Proceed to A-13.

# A-13: Jacket detection switch (detection circuit 8 in FIG. 1)
(Equivalent to 0) is turned on, the process jumps to the subroutine, and when it is not turned on, the process proceeds to # A-14.

# A-14: The program reproduction mode flag and the program reproduction execution flag are cleared.

As described above, after executing the flow shown in FIG. 5 to allow the head 3-1 to access the first track of the magnetic sheet, the flow jumps to the flow shown in FIG.
While detecting the state of each switch shown in FIG. 3, FIG. 3, and FIG. 4, the flow shown until the state of each switch is repeatedly executed to call a subroutine corresponding to the operated switch. Become.

The subroutine called when the track setting feed speed switch 56 is turned on will be described with reference to FIG.

FIG. 7 is a flowchart showing a subroutine executed when the switch 56 for changing the track setting feed speed is turned on.

# F-1, # F-2: The set value of the track feed speed is read from the memory, and the set value is set in a track number display buffer (not shown).

Therefore, the 2-digit 7-segment LE shown in FIG.
The track feed speed is displayed on D25. When the flow comes to this step for the first time, the track feed speed is displayed on the 2-digit 7-segment LED 25 shown in FIG. 3 every second at # 1. When the flow comes to this step for the first time, the track feed speed of 2 screens per second is set in # 1. Is displayed.

# F-3: When the track feed speed setting switch 56 is on, the flow repeats # F-3, and the switch 56
Is turned off, the flow moves to # F-4.

As described above, once the track feed speed setting switch 5 is turned on, the 2-digit 7-segment LED 25 shown in FIG. 3 is switched from the track number display to the track feed speed display, and then again. By turning on the switch 56, the track feed speed is switched. # F-
As described above, 3 is provided so that the track feed speed is switched only when the switch 56 is once turned on, once turned off, and then turned on again, and the 7-segment LED 25 display of the target changes from the track number display to the track feed. This is a step provided to cancel the setting of the track feed speed when the switch 56 or another switch is not turned on within a predetermined time (2 seconds) after switching to the speed display. . When the track feed speed setting switch 56 is turned on within a predetermined time (2 seconds) after the timer 1 starts counting, # F-7 to #F
When the flow advances to -10 and the timer 1 completes timing or when another switch is turned on, # F-6 to #F
The flow proceeds to -8.

# F-8: Clear the count value of timer 1.

# F-9: Contrary to # F-1, the display of the two-digit 7-segment LED 25 shown in FIG. 3 is returned to the display of the track number again.

# F-10: The count value of the timer 1 is cleared.

# F-11: The track feed speed is set to a single value (once recorded or played back, it is head-shifted by one track in field mode and 2 in frame mode).
The flow proceeds to step # F-12 in the case of single, and to step # F-13 in the case of non-single. As described above, when the flow reaches this step after the power switch 41 is turned on, 2 screens per second are preset as the track feed speed in # 1.

# F-12: If the track feed speed set value is single, change the set value to 2 screens per second and return to # F-1,
The changed track feed speed is displayed and the above-mentioned #F
-3 to # F-7 are executed.

# F-13: It is detected whether or not the track feed speed set value is two screens per second. If the screen feed rate is two screens per second, the flow proceeds to # F-14. If not, the flow proceeds to # F-15.

# F-14: Change the track feed speed set value to 5 screens per second, return to # F-1, display the changed track feed speed, and execute the above steps # F-3 to # F-7.

# F-15: Detects whether the track feed speed set value is 5 screens per second. If it is 5 screens per second, go to # F-16. If it is not 5 screens per second, that is, if 10 screens per second are set. The flow proceeds to # F-17.

# F-16: It is determined whether or not the PB mode flag is set. When the PB mode flag is set, that is, when the reproduction mode is set, # F-18 is set. When the PB mode flag is reset, that is, when the recording mode is set, # F-19. The flow proceeds to.

# F-17: Change the track feed speed set value to single, return to # F-1, display the changed track feed speed, and execute the above-described steps # F-3 to # F-7.

# F-18: In the reproduction mode, field reproduction is performed regardless of whether the video signal recorded on the track of the magnetic sheet 1 is the field video signal or the frame video signal. Therefore, in such a case, the track feed speed setting value is changed to 10 screens per second, and the flow returns to # F-1.

# F-19: It is detected whether or not the field flag is set, and if the field flag is set,
That is, in the recording mode, a track feed of 10 screens per second is set, and in the field mode, the flow branches to # F-18.

When the field flag is not set, that is, when the track feed speed setting value of 10 screens per second is set in the recording mode and the frame mode is set, # F-17
The flow proceeds to change the track feed speed set value to single.

Therefore, in the above-described subroutine, when the track feed speed setting switch 56 is turned on, the track feed speed is displayed on the two-digit seven-segment LED 25 shown in FIG. 3, and the track feed speed is displayed within a predetermined time (two seconds). The track feed speed is changed by turning on the switch 56 again.

In the frame recording mode, there are three kinds of change ranges: single, two screens per second, and five screens per second, and in other than the frame recording mode, four kinds of single, two screens per second, five screens per second and ten screens per second It has become.

The range of the change is the head 3-1 and 3-2 shown in FIG.
This is related to the track shift capability of the moving mechanism and the like, and is set in advance to an appropriate range according to the track shift capability.

Next, a subroutine called when the track UP switch 54 and the track DOWN switch 55 are turned on during execution of the subroutine shown in FIG. 8 using FIG.
Will be described. First, a flow called when the track UP switch 54 is turned on will be described.

# D-1: When the flow reaches this step, head 3
It is determined whether the track accessed by -1 is the innermost track by detecting whether the register N is 50 or not.

As a result, if N is not 50, go to # D-2 and N is 50
If it is, the flow proceeds to # D-34 described later.

# D-2: It is determined whether or not the PB mode flag is set. When the PB mode flag is set, that is, in the reproduction mode, the flow proceeds to # D-8. When the PB mode flag is not set, that is, in the recording mode, the flow proceeds to # D-3.

# D-3: The address N + 1 of the memory is "0000", that is, the (N + 1) th
It is detected whether or not the track is unrecorded. If not, the flow branches to # D-4. If the track is already recorded, the flow branches to # D-7.

# D-4: The fact that the (N + 1) th track has not been recorded is #D
If it is determined in step -3, it is determined in this step whether or not the field flag is set. If the field flag is set, the process proceeds to step # D-6. If the field flag is not set, the process proceeds to step # D-.
The flow proceeds to 5.

# D-5: This step is reached when it is determined in # D-4 that the field flag has not been set and the frame mode has been set. In this step, it is detected whether or not the (N + 2) th content of the memory is "0000", and if it is "0000", that is, if the (N + 2) th track has not been recorded, go to # D-6. , "0000", that is, if the (N + 2) th track has been recorded, the flow proceeds to # D-7.

By executing steps # D-3 to # D-5, in the frame mode, if both consecutive two tracks have not been recorded, the process goes to # D-6, and at least one of the consecutive two tracks Is recorded, #D
The flow proceeds to -7.

# D-6: The track being accessed by the head 3-1 in the field mode, the track being accessed by the head 3-1 in the frame mode, and one track more than the track and one track within the track. When the track accessed by the head 3-2 toward the circumference is unrecorded, that is, when the track is recordable, the flow reaches this step, and RE shown in FIG.
C LED44B lights up.

# D-7: In contrast to # D-6, when the track to be accessed and recorded by the heads 3-1 and 3-2 has already been recorded, the REC LED 44B shown in FIG. 3 blinks. (Flashing), a warning is displayed so that the user can recognize that recording is not possible.

# D-8: If the PB mode flag is set in # D-2, the flow reaches this step, and the field flag is set.

The meaning of this step is # D-9, # D-10, #
An explanation will be given when D = 13.

# D-9: Whether or not the track accessed by the head 3-1 is the track on the outer peripheral side of the two tracks constituting the frame video signal as the address N of the memory is "0011", that is, as explained in # 13. If it is the outer track of the two tracks, the flow proceeds to # D-10, and if it is not the outer track, the flow proceeds to # D-13.

# D-10: It is detected whether the address N + 1 of the memory is "0010", that is, whether the track accessed by the head 3-2 is the inner track of the two tracks constituting the frame video signal. If the track is on the inner side of the two tracks, the process goes to # D-11. If the track is not on the outer side, # D-11 is reached.
The flow proceeds to -13.

That is, if the inner track of the two tracks constituting the frame video signal is erased or a new video signal is recorded after the erasure, the track accessed by the head 3-1 constitutes the frame video signal. Even if it is the outer track of the two tracks, the track accessed by the head 3-2 may not be the inner track of the two tracks. Therefore, in this case, when shifting the heads 3-1 and 3-2 to the inner peripheral side, it is necessary to shift only one track and to erase or to reproduce a track on which a new video signal is recorded after erasing. However, in such a case, if only one track of the heads 3-1 and 3-2 is shifted to the inner peripheral side, the heads 3-1 and 3-2 are
The frame video signal is not always recorded in the track that 3-2 is accessing, and there are cases where completely different field video signals are recorded in each. In this case, if the field flag is reset, there is a problem that two separate field video signals are reproduced as frame video signals. Therefore, by providing the step # D-8 described above, in the present embodiment, when the head is shifted to the inner peripheral side, the field mode is set by setting the field flag in advance in the step, and the above-mentioned case is set. In the above, it is possible to solve the problem that a completely different field video signal is reproduced as a frame video signal.

# D-11; In this step, it is detected whether or not the register N is 49, and if N is 49, go to # D-13,
If N is not 49, the flow branches to # D-12.

# D-12; Heads 3-1 and 3-2 are accessing 2
When the form video signal is recorded in one track, the flow reaches this step. When such a record is made, when the track UP switch is turned on, the driver 23 is driven so as to shift the heads 3-1, 3-2 by one track at this step, and then # D-13.
In 1 further shifts one track head 3-1, 3-2. As described above, N is updated by 1 each time the heads 3-1 and 3-2 are shifted.

# D-13; Heads 3-1 and 3-2 are set to 1 as in # D-12.
Shift by track.

Similar to # D-14 and # 23, N is made to be represented by the 2-digit 7-segment LED 25 shown in FIG.

In this embodiment, since such a step is provided in the flow after # D-12 and # D-13, the heads 3-1 and 3-2 are used.
The track number displayed on LED25 is updated by 2 when the frame video signal is recorded on the track being accessed by, and the track number displayed on LED25 when the field video signal is recorded. Will be updated one by one, and it is possible to display which of the field video signal and the frame video signal is recorded on the magnetic sheet 1.

Also, when this step is provided between # D-12 and # D-13, the frame video signal is recorded in the two tracks accessed by the heads 3-1 and 3-2. Even if it is, when the track UP switch 54 is turned on, the track number displayed on the LED 25 is updated by one.

# D-15: It is determined whether the PB mode flag is set. If it is set, the flow branches to # D-16. If it is not set, the flow branches to # D-19.

# D-16: It is determined whether or not the track accessed by the head 3-1 at address N of the memory is "0011" is the track toward the outer periphery of the track where the frame video signal is recorded. Here, N corresponds to the number of the track accessed by head 3-1 after heads 3-1 and 3-2 have already been moved as described above. Here, if the content is "0011" at address N of the memory, the flow branches to # D-17, and if it is not "0011", the flow branches to # D-19.

# D-17: It is determined whether the content of the address N + 1 in the memory is "0010", that is, whether the track accessed by the head 3-1 is the inner track of the two tracks where the frame video signal is recorded.

Here, if the address N + 1 of the memory is "0010", the flow proceeds to # D-18, and if it is not "0010", the flow proceeds to # D-1.
Branch to 9.

When the flow reaches this step via # D-18; # D-16 and # D-17, the frame video signal is transmitted to the two tracks accessed after the heads 3-1 and 3-2 have moved. Since the data has been recorded, the field flag set in # D-8 is cleared to set the frame reproduction mode.

# D-19: In this step, it is judged whether or not the automatic track feed flag is set, and when it is set, the routine returns to # D-20, and when it is set, this subroutine returns (RTS ).

The automatic track feed flag is a flag that is set in a subroutine to be described later, in order to get out of this routine when calling a subroutine or later described while executing a program that repeats playback while automatically sending a track. It is provided in.

# D-20: The track feed speed set value is fetched from the memory.

# D-21: It is determined whether or not the set value of the track feed speed is single.
If not single, the flow branches to # D-22.

# D-22: It is determined whether or not the track feed speed set value is two screens per second, and if it is two screens per second, # D-23
If the screen is not 2 screens per second, the flow branches to # D-24.

# D-23: Set WAIT TIMER register in CPU 40 to 28.

# D-24: It is determined whether or not the track feed speed set value is 5 screens per second. If it is 5 screens per second, # D-25
If it is not five screens per second, the flow branches to # D-26.

# D-25: Set the WAIT TIMER register to 10.

# D-26; If 10 screens per second are set as the track feed speed setting value, the flow proceeds to this step, and the WAIT TIMER register is set to 4.

In addition, the WA set in # D-23, # D-25, and # D-26
The IT TIMER register is used to control the track feed speed, and is subtracted each time the magnetic sheet 1 rotates once by the DC motor 2 in # D-31 and # D-32 described later.

# D-27: It is determined whether or not the REC execution flag has been set. If the REC execution flag has been set, the flow branches to # D-28. If not, the flow branches to # D-31. Here REC
The flag is a flag that is set in the subroutine. It is set when the subroutine is called during the execution of a program that repeats recording while automatically sending a track. # D-2 from the WAIT TIMER register
It is provided to save time corresponding to the time required for recording by subtracting 2 or 5 in 9, # D-30. That is, in the recording mode, the magnetic sheet 1
Is provided for detecting the rotation state of the PG coil 21 to determine the timing for recording a signal to be recorded from a predetermined position on the magnetic sheet, and for recording the signal on the magnetic sheet 1.

; It is determined by these three steps whether or not the field flag is set, and if it is set, WA is set.
Subtract 2 from the IT TIMER register, and subtract 5 from the WAIT TIMER register if not set. Here, if 10 screens per second are set as the track feed speed, the WAIT TIMER register is set to 4. However, such setting is possible only in the field mode. Is not subtracted.

# D-31: It is detected whether there is a pulse from the reference signal generator 19 shown in FIG.
If the flow does not branch to 32, the flow of # D-31 is repeated.

# D-32; 1 is subtracted from the contents of the WAIT TIMER register.

# D-33: It is determined whether or not the content of the WAIT TIMER register has become 0. If it is 0, the process branches to # D-34. If it is not 0, the process branches to # D-31.

In the steps # D-32 to # D-33, the WAIT TIMER register and the reference signal generator 19 are used as the timer for controlling the track feed speed. Therefore WAIT TIME
Compared to a method of forming a timer by subtracting the contents of the R register according to the outlet of the waveform shaping circuit 22 that shapes the output of the PG coil 21, a stable and more accurate clock operation can be performed. That is, the output of the PG coil 21 may include an error due to a cause such as uneven rotation of the magnetic sheet 1, but the output of the reference signal generator 19 has substantially no error. When performing interval reproduction or recording, it is desirable to stop the rotation of the DC motor 2 during the interval time in order to save power consumption. When such an operation is performed, the interval time cannot be elapsed by the method of subtracting the WAIT TIMER register according to the output of the waveform shaping circuit 22, but even if such an operation is performed by the method of the present embodiment. Stable clocking operation can be performed.

# D-34; It is judged whether or not the REC execution flag is set, and if it is set, the program that called the subroutine is returned (RTS). If it is not set, #D Branch to −35.

# D-35: It is determined whether or not the track UP switch 54 is on, and when it is on, the head 3-
To shift the track being accessed by 1, 3-2 to the inner circumference side, it goes to # D-1. When it is off, # D-
The flow branches to 36.

# D-36; #Truck DOWN Switch 55 is checked to see if it is on, and if it is on, the head 3-
To shift the track being accessed by 1 and 3-2 to the outer peripheral side, the routine returns to # E-1 of the subroutine, and when it is off, the program that called the subroutine is returned to.

Next, a subroutine executed when the track DOWN switch 55 is turned on will be described.

Each of the steps # E-1 to # E-13 of the subroutine is the same as each of the steps # D-1 to # D-13 of the subroutine, and a detailed description thereof will be omitted.

However, since the subroutine shifts the track being accessed by the heads 3-1 and 3-2 to the outer peripheral side when the track DOWN switch 55 is turned on, for example, in # E-, it is detected whether N = 1. , # E-9, the memory (N-1) battery detects "0010", that is, whether the (N-1) th track is an inner track of the two tracks constituting the frame video signal, In -10, it is detected whether the memory (N-2) address is "0011", that is, the (N-2) th track is the outer track of the two tracks constituting the frame video signal, and # E- 11 in N
= E = 2, # 1 in # E-12 and # E-13
The heads 3-1 and 3-2 for the track are shifted to the outer peripheral side.

Next, a subroutine called when the field / frame switching switch 59 and the REC mode setting switch 51 are turned on will be described with reference to FIG.

# J-1; the field / # in # A-10 shown in FIG.
When it is detected that the frame switching switch 59 has been turned on, the flow proceeds to this step. In this step, if the field flag is set, #J
-2, the flow branches to # J-4 when not set.

# J-2; When the field flag is set in # J-1, the field flag is cleared in this step.

# J-3: It is determined whether or not the PB mode flag is set. If the PB mode flag is set, the flow branches to # J-8. If the PB mode flag is not set, the flow branches to # J-5.

# J-4; When it is detected in # J-1 that the field flag is not set, the field flag is set in this step.

When the PB mode is in the unset state, that is, the recording mode, and the field flag is cleared in # J-2, the frame recording mode is set. Can not. Therefore, when switching from the field mode to the frame mode in the subroutine, it is necessary to prohibit such switching if the track feed speed of 10 screens per second is set as the track feed speed.

Therefore, according to this embodiment, # J-6, which will be described below,
When the track feed speed of 10 screens per second is set by # J-7, the track feed speed setting value is automatically changed to the track feed of 5 screens per second.

# J-5; The track feed speed set value is taken into the CPU 40.

# J-6; If the track feed speed setting value captured in # J-5 is 10 screens per second, go to # J-7.
If it is not 10 screens per second, the flow branches to # J-8.

# J-7: Change the track feed speed set value to 5 screens per second.

# J-8; If the field / frame setting switch 51 is kept turned on, this step is repeated, and only when it is turned off, the step shown in # A-1 in FIG. 6 is returned to.

Next, a subroutine called when the REC mode setting switch 51 is turned on will be described.

# B-1; When it is detected that the REC mode setting switch 51 is turned on in # A- shown in FIG. 6, the flow branches to this step, and the PB and LED44A shown in FIG. 3 are turned off. However, the PB mode flag is cleared.

These five steps are # D-3 shown in FIG. 8, respectively.
The description is omitted because it is similar to # D-7.

# B-6 '; This step is repeated while the REC mode setting switch 51 is kept on, and when the switch is turned off, the flow branches to # B-7.

# B-7: When the REC mode setting switch 51 is turned off, it is determined whether or not the field flag is set in this step. When the field flag is set, the process goes to # A-1 in FIG. The flow returns to the step shown, and when the field flag is not set, the routine jumps to # J-5 of the subroutine, and # J-6 to # J-
By executing step 8, when the track feed speed set value is 10 frames per second, it is automatically corrected to 5 frames per second.
Therefore, when the REC mode is set by the REC mode setting switch 51 and the frame mode is set, the track feed speed setting value is limited to a maximum of five screens per second.

Next, the subroutine called when the PB mode setting switch 53 is turned on will be described with reference to FIG.

# C-1; When it is detected that the PB mode setting switch 53 is turned on in # A-3 shown in FIG. 6, the flow branches to this step and the field flag is once set. That is, the heads 3-1, 3-2 accessing 2
If different field video signals are recorded in one track and the PB mode flag is cleared and the field flag is reset, it is detected that the PB mode setting switch 53 is turned on. In this step, the field flag is once set in order to prevent the separate field video signals from being interlaced and reproduced when the tracks being accessed by the heads 3-1 and 3-2 are immediately reproduced.

# C-2: It is detected whether the address of the memory is "0011", that is, whether the track accessed by the head 3-1 is on the outer peripheral side of the two tracks where the frame video signal is recorded. In some cases, the flow branches to # C-3 when it is not "0011".

# C-3: The address of the memory N + 1 is "0010", that is, the head 3-2.
It is determined whether the track being accessed is the inner track side of the two tracks on which the frame video signal is recorded. If the track is "0010", then go to # C-4. The flow branches to # C-5.

Heads 3-1 and 3 in # C-4; # C-2 and # C-3
When it is detected that the frame video signal is recorded in two tracks accessed by the control unit -2, the flow reaches this step, the field flag is cleared, and the frame mode is set.

# C-5; The PB and LED 44A shown in FIG. 3 are turned on, the PB mode flag is set, and the reproducing operation is started.

# C-6; When the PB mode setting switch 53 is continuously turned on, this step is repeated, and when it is turned off, the process returns to # A-1 via # A-14 shown in FIG.

Next, referring to FIG. 1, an interval time setting switch 57
A subroutine called when is turned on will be described. First, in such a subroutine, the timer T'is initialized to 0.

# G-1; When it is detected that the interval time setting switch 57 is turned on in # A-7 of FIG. 6, the timer T'is initialized to 0, and then the flow reaches this step. Further, the flow branches to # G-2 when the 10-key switches 63 to 72 are turned on, and to # G-3 when the 10-key switches 63 to 72 are not turned on.

# G-2: The interval time Ti is changed to the interval time Ti set by the 10-key switches 63 to 72.

# G-3: It is determined whether switches other than the 10-key switches 63 to 72 are turned on.
If it is not turned on, the flow branches to # G-5.

# G-4: It is detected whether or not the interval time setting switch 57 is turned on, and when it is turned on, # G-1 is turned on, and when it is not turned on, # A-1 shown in FIG. The flow branches to.

# G-5; The above-mentioned T'is incremented by 1 and # G- is incremented every 1 second.
The flow moves to 6.

# G-6; It is judged whether T'is 10 or not. When T'is 10, # A-1 shown in FIG. 6 is given. When T'is not 10, # G-1. Branch to # G-1, # G-3,
The loop of # G-5 and # G-6 is repeated, and when T 'reaches 10, the process returns to # A-1.

Therefore, in the above-described subroutine, if another switch is not turned on within 10 seconds after the interval time setting switch 57 is turned on, # A- shown in FIG.
It returns to 1 and the interval time setting is canceled.

Also in this subroutine, the interval time
When Ti is set to "0", an external trigger mode is set as a reproducing operation, which is described in the sub-lutch, for example, when the apparatus is connected to a printer.

Next, the subroutine called when the REC switch is turned on will be described with reference to FIG.

# N-1; When it is detected in FIG. 6 # A-2 that the REC switch 52 is turned on, a flow arrives at this step, and it is detected whether or not the PB mode flag is cleared. When it is not cleared, it is in the reproduction mode, so the flow returns to # A-14 shown in FIG. 6 (RTS). When it is cleared, the flow branches to # N-2. Therefore REC
If the mode is not set, recording is not performed even if the REC switch 52 is turned on.

# N-2: It is determined whether or not the address N of the memory is "0000", that is, whether or not the track accessed by the head 3-1 is unrecorded. #A
The flow returns to -14, and if it has not been recorded, # N-3
The flow branches to. # N-3; If the field flag is set, it is determined whether the field flag is set or not.
5. If not set, the flow branches to # N-4.

# N-4; This step moves when the frame recording mode is set, but if the memory N + 1 address is "0000", that is, the track accessing the head 3-2 is not recorded. If it is not unrecorded, the flow returns to # A-14 shown in FIG. In such a case, the REC and the LED 44B are blinking in advance.

If such a track has not been recorded, # N-
The flow branches to 6.

# N-5: A video signal for one field is sent to the track accessed by the head 3-1 on the magnetic sheet 1.
Recorded by -1.

# N-6: When the flow reaches this step, since the frame recording mode is set, the video signal for one field is applied to each of the two tracks on the magnetic sheet 1 at the head 3.
-1, 3-2. Next, the step motor 24 is driven to shift the heads 3-1 and 3-2 inward by one track.

When executing # N-5 and # N-6, SW2 to SW5 are the second
It is driven as described in the figure.

# N-7; REC execution flag is set.

# N-8: Call subroutine, head 3-1 is
# D-1 when accessing other than 50 tracks,
The flow moves from # D-2 to # D-3. Next, # D-3
To # D-14 to move the head 3 toward the inner circumference for one track.
-1, 3-2 are moved. If it is the frame recording mode, the head for one track is previously set to # N-6, and the head, 3-
Since 1 and 3-2 have been moved, even in the frame recording mode, the head 3-1 accesses the track adjacent to the track recorded in # N-6. Head 3
When the track recorded by -1, 3-2 is already recorded, the REC and LED 44B shown in FIG. 3 blink to display a warning to the user.

Next, the flow branches from # D-15 to # D-19, and # D-19
The flow shown in # D-20 to # D-34 is executed via -19.

That is, when the set value of the track feed speed is single, the flow branches from # D-21 to # D-34, and returns to # N-9 in accordance with the REC execution flag set in advance in # N-7. .

When 2 screens / second and 5 screens / second are set, # D-
When the WAIT TIMER register is subtracted for the time required for recording at 28, the WAIT TIMER register is down-counted, and the WAIT TIMER register becomes 0, the flow is #
In accordance with the REC execution flag set in # N-7 through # D-34 to # N-9 in the same manner as described above via D-33.
Return to

# N-9: Clear the REC execution flag.

# N-10: This step is the same as # D-20, and takes in the set value of the track feed speed from the memory.

# N-11: If the set value of the track feed speed is single, the process returns to # N-12. If not, the process returns to # A-14 shown in FIG.

# N-12: When the track feed speed is set to single, this step is repeated as long as the REC switch 52 is on, and control is performed so that the subroutine is executed again and recording is not performed.

When the track feed speed is set to other than single and the REC switch 52 is on, # N-11
From # A-14 to # A-4 and # A-2, a subroutine is called and the above flow is executed and the REC switch 5
Recording continues at the set track feed speed as long as 2 is on. If the REC switch 52 is turned off, the flow is from # N-12 to # A-14, # A-1, # A-.
The process proceeds to step 2, but the subroutine is not called at # A-2, and the continuous recording ends.

Next, a subroutine called when the program setting switch 58 is turned on will be described with reference to FIG.

# H-1; When it is detected in FIG. 6 # A-8 that the program setting switch 58 has been turned on, this step is reached, and it is determined whether or not the PB mode flag has been set. If it has been set, the process returns to # H-2, and if it has not been set, the process returns to # A-1 shown in FIG. 6 (RTS).
This step is provided to prohibit program setting in the recording mode. That is, in the present embodiment, the program is set while selecting the reproduction mode in advance when setting the program, so that the image recorded on the magnetic sheet 1 is checked on a monitor, for example.

Further, by automatically setting the PB mode flag when the program setting switch 58 is turned on, the operation to the reproduction mode can be automatically performed. In this case, a step similar to the step shown in # C-5 is performed by # H-
It does not have to be provided in place of 1.

# H-2; When the program is reproduced in the program track memory shown in FIG. 14 in which the program is stored, the I register indicating the address where the next track number to be reproduced is stored is set to "0".

# H-3: The program reproduction mode flag indicating the program reproduction mode is set, and the process returns to # A-1.

Next, after the program playback mode is set by the subroutine, the subroutine called when the program track setting switch 62 is turned on is continued.
This will be described with reference to the drawings.

# I-1: It is determined whether or not the program reproduction mode flag is set. When the flag is set, the flow branches to # I-2. When the flag is not set, the flow branches to # A-1.
Therefore, when the program reproduction mode is not set by the program setting switch 58, the program setting operation is not performed even if the program track setting switch 62 is turned on.

# I-2; register S (# indicating the start address where the program of the program track memory is stored
In step 1, when the power is turned on, S = 0 is initialized, and the same contents as those described in step S1) are written into the register M.

# I-3; #The data in the program track memory at the address stored in the register M is stored at an address which is larger by 1 than the address. In other words, the data indicating the track number stored in the program track memory is stored at an address which is larger by 1 than the address where the data is stored.

# I-4; Write a value obtained by adding 1 to the contents of the register M to the register I.

# I-5; 1 is subtracted from the contents of the register M.

# I-6: It is determined whether the content of the register M is 0 or not. If it is 0, the flow branches to # I-7, and if it is not 0, the flow branches to # I-3.

The flow of # I-3 to # I-6 is repeated, and the register M
Is zero, the data stored in each address of the program track memory is all transferred to the address which is larger by one. Therefore, when this flow is repeatedly executed and the flow branches from # I-6 to # I-7, no data is stored at address 1 of the program track memory.

# I-7: The number of the track being accessed by head 3-1 is stored in address 1 of the program track memory. Therefore, the program track setting switch
When the switch 62 is turned on, the head 3-1 accesses and the track number of the recorded track of the image being reproduced is programmed.

# I-8; 1 is added to the contents of the register S. By executing this step, the register S always has # I-3 to # I-3.
The head address (largest address) where the data of the program track memory moved by executing the flow of # I-6 is stored.

# I-9; If the program track setting switch 62 is on, this step is repeated, and if it is off, the procedure returns to # A-1.

If the user continues to set the program further, the track UP switch 54 or the track DOWN switch 55
Is turned on to change the track being accessed by the heads 3-1 and 3-2, and when the desired track is reproduced, the program setting is performed by turning on the program setting switch 62 while checking the reproduced video. I can do it.

It should be noted that every time the program setting switch 62 is turned on, the 14th
The data stored in each address of the program track memory shown in the figure is stored in an address that is one by one. Further, the register S and the register I have exactly the same contents during the program setting.

Next, the program setting switch 58 and the program setting for reproducing the program set by turning on the program track setting switch 62 are performed, and the recorded tracks are sequentially set from the track accessed by the head 3-1. A program executed at the time of performing the interval reproduction which is reproduced in step 1 will be described with reference to FIGS. 16 to 18.

First, the subroutine 20 that is called when the start switch 60 is turned on will be described with reference to FIG.

# K-1; When it is detected that the start switch 60 is turned on in # A-11 in FIG. 6, a flow comes to this step, and it is detected whether or not the PB mode flag is set. If the mode flag is not set #
When the PB mode flag is set in A-1, #
The flow branches to K-2. Therefore, in this embodiment, if the reproduction mode is not set in advance, the interval reproduction and the program reproduction cannot be performed. Therefore, even if the start switch 60 is mistakenly turned on in the recording mode, the interval reproduction and the program reproduction are not performed. It can be prevented from being started. # Instead of # K-1
If a step similar to that shown in C-5 is provided, the interval reproduction program reproduction can be started immediately by turning on the start switch 60 without setting the reproduction mode in advance.

# K-2: It is judged whether or not the program reproduction mode flag is set. When it is set, the flow branches to # K-3 when it is not set.
Here, a flow when the program reproduction mode flag is not set, that is, when the interval reproduction is performed, will be described.

# K-4: N address of memory is "0000", that is, head 3-
It is determined whether or not the track No. 1 is unrecorded. If it is not recorded, # K−6 is recorded.
The flow branches to -5. Here, first, head 3-1
It is determined that the track being accessed is unrecorded and #K
-6 The following flow will be described.

According to the present embodiment described below, interval reproduction is performed when the track accessed by the head 3-1 is other than the 49th or 50th track, and the track accessed by the head 3-1 is not the 49th or 50th track. Is the 49th or 50th
At the time of the track, only the recorded track is reproduced sequentially from the first track, but # K-2 and # K-4.
If a step for driving the step motor 24 is inserted between the head 3-1 and the first track so as to access the first track, only the recorded tracks are reproduced sequentially from the first track.

Therefore, when the head 3-1 is not accessing the first track but is accessing another track, it is extremely effective to perform the interval reproduction automatically and sequentially from the first track to perform the search.

# K-6; The automatic track feed flag indicating that interval reproduction is in progress is set.

# K-7: It is determined whether or not the field flag is set. When the field flag is set, the flow branches to # K-9 when the field flag is set to # K-8.

# K-8: It is determined whether or not the track accessed by the head 3-1 is the innermost track by detecting whether or not N is 50, and it is detected that the track is 50. In this case, the flow branches to # K-10, and when it is not detected that it is 50, the flow branches to # K-11.

# K-9: It is determined whether or not the track being accessed by the head 3-1 is one track outside the innermost circumference by detecting whether or not N is 49, and 49 is detected. If it is not detected that the value is 48 to # K-10, the flow branches to # K-11.

# K-10; In this step, the interval time Ti set by executing the subroutine is "0".
Is determined. As will be described later, when the interval time Ti is "0", it is a mode in which the preset program head 3-1 is shifted according to the external trigger signal, and the interval time is due to this mode.
When Ti is set to “0”, the flow is # A-1,
When it is not set to "0", the flow branches to # K-12.

# K-11; Calls a subroutine, # D-1 to #D
The flow indicated by −18 is executed. When the subroutine is called in the subroutine, the flow is from # D-2 to # D-9 since the PB mode flag is set.
And the track on the inner side of the track that is accessed by the head 3-1 at # K-4 is the track on the inner side of the two tracks that record the frame video signal, and the head 3-1 is the first track. When it is determined that 49 tracks are not being accessed, the heads 3-1 and 3-2 are # D-12 and #.
When it is not discriminated by shifting to the inner circumference side by 2 tracks by D-13, only one track is moved by # D-13.
1, 3-2 are shifted to the inner circumference side. Also head 3-
If the frame video signal is recorded in the track 1 or 3-2 being accessed, the field flag is cleared and the flow moves from # D-19 to # K-14.

# K-12; Call subroutine # E-1 to # E-1
3 and the flow shown in # D-14 to # D-19 is executed,
If the frame video signal is recorded in two tracks, the outer track adjacent to the track accessed by the head 3-1 at # K-4 and the other track on the outer track side, the head 3-1 is used. 3-2: # E-12, # E-13
Is shifted to the outer peripheral side by two tracks, otherwise, only one track is shifted to the outer peripheral side by # E-13.

If a frame video signal is recorded in the track 3-1 or 3-2 accessed similarly to # K-11, the field flag is cleared and the flow is from # D-19 to #D.
Move to K-13.

# K-13: It is determined whether or not the track accessed by the head 3-1 is the outermost track by detecting whether or not the content of the register N is "1". The flow branches to # K-14 when it is performed, and to # K-12 when it is not detected that it is 1. Therefore, when the flow branches to # K-12 at # K-8 or # K-9, that is, when the head 3-1 accesses the 49th track or the 50th track, # K-12, # K-12
The head 3-1 is obtained by repeating the steps of K-13.
Is controlled to access the first track.

# K-14: Clear the automatic track sending flag.

As described above, the flow of # K-4 to # K-14 is executed, and when the flow branches from # K-4 to # K-5, the head 3-1 sets the track where the video signal is recorded. , And the track on which the video signal is not recorded is skipped without being substantially reproduced.

Further, by executing the flow of # K-4 to # K-14, when the flow branches from # K-4 to # K-5, the two tracks accessed by the heads 3-1 and 3-2 are connected. When a frame video signal is recorded, the field reproduction mode is automatically set since the field flag is cleared at # D-18. Also head 3-
When the field video signal is recorded on the track being accessed by the items 1 and 3-2, the field reproduction mode is automatically set. Therefore, during interval reproduction, the most appropriate reproduction mode is automatically set according to the recording method of the video signal.

# K-5; The interval time Ti set in the subroutine is fetched from the memory by the CPU 40.

# K-15; The interval time Ti is "0" as in # K-10.
The flow branches to # K-17 if it is "0" and to # K-16 if it is not "0". Here, assuming that the external trigger mode is not set, # K-16
The following description will be given.

# K-16: The timer 1 starts counting time, and proceeds to # K-18.

# K-18: It is detected whether or not the timer 1 has counted one second. When the timer is counting, the flow branches to # K-19. When the timer is halfway, the flow branches to # K-20.

# K-20: It is detected whether or not the stop switch 61 is turned on. When the stop switch 61 is turned on, the flow branches to # A-1. When the stop switch 61 is not turned on, the flow branches to # K-21. When the flow branches to # A-1, the steps # A-1 to # A-12 are executed again. Therefore, when the stop switch 61 is turned on in the normal state, the flow is # A-12. Will call the subroutine from. Hereinafter, the subroutine will be described with reference to FIG.

# M-1: It is detected whether or not the program reproduction mode flag is set. If not, # A-14
If it is set, the flow branches to # M-2.

# M-2: It is detected whether or not the program reproduction execution flag is set. If the flag is set, the flow branches to # M-3. If not, the flow branches to # M-4.

# M-3: The contents of the register I are made the same as the contents of the register S.

# M-4: The register S is set to 0, and then # M-3 is executed.

This subroutine will be described in more detail in the program reproduction mode. The steps from # K-21 onward will be described in detail below.

# K-21: It is detected whether or not the track UP switch 54 is ON. When it is detected that the track UP switch 54 is ON, the subroutine is called and the heads 3-1 and 3-2 are shifted to the inner peripheral side, and If it is not detected, the flow branches to # K-22.

# K-22: It is detected whether the track DOWN switch 55 is on, and when it is detected that it is on, a subroutine is called, and the heads 3-1 and 3-2 are shifted to the outer peripheral side and turned on. When it is not detected, the flow branches to # K-16.

# K-19; 1 is subtracted from Ti.

# K-23; The flow branches to # K-24 when Ti is "0", and to # K-16 when Ti is not "0".

Therefore, by executing the above-mentioned steps # K-15 to # K-23, the track UP switch during the interval reproduction is performed.
By turning on the track 54 and the track DOWN switch 55, the image recorded on the track adjacent to the track being reproduced can be reproduced. In this case, by continuously turning on the switch 54 or the switch 55, it is possible to automatically update the tracks being played back in accordance with the track feed speed set in the subroutine, and a few screens earlier during the interval playback. You can also easily play the video.

In addition, the track UP switch 54 and the track DOWN switch
In reproducing the image recorded on the track adjacent to the track being reproduced by turning on the switch 55, the interval time Ti of the track being reproduced before the switches 54 and 55 are turned on in this embodiment. When the remaining time is replayed from # K-23 to #
It moves to K-24 and is updated to playback of a new track.
As shown by the dotted line in Fig. 16, if the flow is jumped to # K-5, the interval time Ti should be reset and the image updated by the switches 54 and 55 should be observed for a certain period of time. You can also

# K-24; It is detected whether the program reproduction mode is set when updating the track to be reproduced after the end of the interval time Ti, and when it is set, #
The flow branches to K-3, and to # K-6 when not set.

Next, the subroutine called when the program reproduction mode flag is set in # K-2 will be described with reference to FIG.

# O-1; It is detected whether or not the content of the register S is “0”, and when “0” is detected, # K-5 is detected. The flow branches to O-2. As described above, the register S stores the start address of the program set in the program track memory, and the content of the register S is "0" when the program is not stored in the program track memory. Therefore, when it is "0", the process branches to # K-5.

# O-2; It is detected whether or not the content of the register I is "0", and if "0" is detected, go to # O-3. If it is detected that it is not "0", The flow branches to # O-3.

As described above, the register I stores the address of the track memory in which the track number to be reproduced next is stored when the program is reproduced. When the program is reproduced, the address is also indicated by # O-14 described later. 1 in
Every time the step program reproduction is executed, 1 is subtracted. Therefore, the flow branches to # O-2, and the register I is detected as "0" because the program is set, the register S is not "0", and the program reproduction step is executed once. It shows that. In other words, when the program reproduction is executed all the way, #O
The flow branches to # O-5 while the program reproduction is being executed all the way to # -3.

# O-3: The interval time Ti set in the sub-routine is taken in and it is detected whether the interval time Ti is "0".
Returning to A-1, the program reproducing operation is ended.

Therefore, in the external trigger mode in which the interval time is set to "0", the program reproduction operation is stopped when the program reproduction is completed.

During normal program reproduction when the interval time Ti is set to a value other than "0", the flow moves to # O-4.

# O-4: Write the contents of the register S to the register I.

 The program operation is started again.

# O-5: The data (I) at the address of the program track memory set in the register I (the data written at the address set in the register I of the program track memory is indicated by parentheses). read out.

# O-6: The data (I) is subtracted from N indicating the track number currently accessed by the head 3-1. If the data (I) is not smaller than "0", the process proceeds to # O-7. The flow branches.

# O-7: Set the field flag. This set is for prohibiting head feed in the frame mode as in # D-8.

# O-8: Heads 3-1 and 3-2 are shifted in the outer peripheral direction by one track.

# O-9: It is detected from the N indicating the track number accessed by the head 3-1 whether the data (I) is equal. If they are equal, the data is not equal to # O-10, that is, the data is more than the N indicating the track number. If (I) is larger than #
The flow branches to O-11.

# O-10: The heads 3-1 and 3-2 are shifted by one track in the inner circumferential direction.

; Steps similar to # D-16, # D-17, # D-18, and automatic frame reproduction and field reproduction depending on whether the video signal recorded by such a step is a frame video signal or a field video signal Is done.

Head # 3 is obtained by repeating # O-6 to # O-10.
-1 is controlled to access the track programmed in the program track memory.

# O-14: 1 is subtracted from the register I. At this step, the flow can be branched by determining whether or not the program reproduction mode flag is set at # K-24.

# O-15: The program reproducing execution flag is set.

Therefore, when the subroutine is called in # K-2, it is first judged whether or not the reproduction program is actually set, and further it is judged whether or not the printer mode is set, and the external trigger mode is set. In that case, the program is executed only once, and in other cases, the program is repeatedly played.

Next, a flow when the external trigger mode is set will be described. When the external trigger mode is set, the flow branches from # K-15 to # K-17.

# K-17 ': It is detected whether or not the printer connected as an external device is busy (printer operation is being executed). If it is busy, it is # A-1. If it is not busy, # K- The flow branches to 18.

# K-18 ': Send a print start signal to a printer as an external device. The print start signal is executed by setting the signal level of the terminal connected to the printer to H level.

# K-19 '; wait 150 msec. # K-20; When the printer is busy, the flow branches to # K-21, and when it is not busy, the flow branches to # K-24.

# K-21 ': It is detected whether or not the stop switch 61 is turned on, and when it is not turned on, the flow returns to # K-20, and when it is turned on, the flow returns to # A-1.

When the printer connected as the external device is busy when executing the above # K-17 'to # K-21', the flow returns to # A-1 as described above, and another switch is restarted. The flow shown in FIG. 6 is repeated until it is turned on. If the start switch 60 is turned on again while repeating the flow shown in FIG. 6, the above-mentioned flow is repeated and # K-17 'is executed again.

When the printer is not connected as an external device, the terminal for inputting the signal from the busy signal output terminal of the printer B'shown in FIG. 1 at # K-17 'is opened to the H level. Therefore, if no device such as a printer is connected even though the external trigger mode is set, the tracks being accessed by the heads 3-1 and 3-2 are continuously reproduced, and the reproduced tracks are continued. Is not updated.

Also, if a printer is connected as an external device and the printer is not busy, # K-17 'to # K-1
When the flow proceeds to 8 ', the printer operation is started after sending the print start signal to the printer and waiting for 150 mspc shown in # K-19. If the pre-tanter becomes busy, the printer operation ends. Or,
# K-20, # K-2 until stop switch 60 is turned on
When the operation of the printer is repeated by repeating 1, the flow branches from # K-20 'to # K-24, and it is determined whether the program reproduction is set by detecting whether the program reproduction mode flag is set. Determine. Here, when the program reproduction is set, the flow branches to the above-described # K-3, and when the program reproduction is not set, the flow branches to # K-6. Also stop switch
When 60 is turned on, it is as described in the above flow.

If the external trigger mode is selected while the program reproduction is set, the program reproduction operation is stopped when the program reproduction is executed as described in # O-3.

Further, according to the present embodiment, even if the external trigger mode is selected and the program reproduction is not set, since the # K-10 is provided, the head 3-
When the reproduction is sequentially performed from the track being accessed in steps 1 and 3 to the last track, the reproduction operation is stopped.

Therefore, in the external trigger mode, whether the program playback is set or not, the playback operation is stopped after the entire playback is performed, so that the printer is used as an external trigger device. Is used, only one type of printing is performed.

On the contrary, when the program is not set to the external trigger mode and the program is set to play, even if the program is not set to play, the playback is performed from the beginning again after the playback is performed in the predetermined order. Is done. Therefore, when such a playback apparatus is used in modes other than the external trigger mode, so-called endless playback can be performed since playback is repeatedly performed in a predetermined order.

Although a printer is described as an external trigger device in the present embodiment, the device may be, for example, a device having a transmission function, or may be another device that processes a reproduced signal.

In the above embodiment, the rotating magnetic sheet 1 and the sheet 1 are provided with means for performing recording or reproduction by rotating either the recording medium or the recording head to change the relative position.
Although the heads 3-1 and 3-2 for recording or reproducing are used in the above, the recording medium is not limited to a magnetic medium, and may be a recording medium such as an optical disk, or a rotating head such as a VTR. Also, a means for recording or reproducing by the rotating head may be used.

Further, in the present embodiment, the PG coil is used as the first generating means for generating the first signal each time the rotation becomes the predetermined phase.
21, the waveform shaping circuit 22 has been described, but when a means for recording or reproducing by a rotary head such as a VTR is used, it may be a means for generating a signal each time the rotation of the rotary head reaches a predetermined phase. .

A reference signal generator 19 for generating a reference signal for controlling the rotation is a reference signal generator 19, and first control means for controlling the rotation by comparing the phases of the first signal and the reference signal. Is a motor control circuit 23, and the second control means for controlling the operation of the recording or reproducing means by counting the reference signal is # D-21 to # 23 shown in FIG.
The CPU 40 executes the flow of # D-33.

<Effects of the Invention> As described above, according to the present invention, it is not necessary to provide a dedicated clock circuit for controlling the operation of the recording or reproducing means, for example, the recording or reproducing period.

In addition, the first generated by the first generating means
In the case of controlling the recording or reproducing period of the recording or reproducing means by counting the number of signals, the recording medium or the recording head is not rotating, and the recording is performed when the first signal is not obtained. Alternatively, although the operation of the reproducing means, for example, the recording or reproducing period cannot be controlled, in addition to the above-mentioned effect, according to the present invention, a reference signal different from the first signal generated by the first generating means is used. Since the counting is performed, it is possible to control the operation of the means for performing recording or reproduction, for example, the recording or reproduction period even in the above case.

[Brief description of drawings]

FIG. 1 is a block diagram showing the construction of an embodiment of the present invention, FIG. 2 is a view showing a combination of switching states of SW2 to SW5 shown in FIG. 1, and FIG. 3 is a front view of the apparatus of this embodiment. 4 and 5 are front views of a remote control device used with the device, and FIGS. 5 to 18 are flow charts of the CPU 40 shown in FIG. 1 Magnetic sheet 3-1, 3-2 Head 40 CPU

 ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-57-162149 (JP, A) JP-A-60-100216 (JP, A) JP-A-58-97136 (JP, A) JP-A-60- 123189 (JP, A) JP 61-172223 (JP, A)

Claims (1)

(57) [Claims] 1. A recording / reproducing device for performing recording or reproduction by rotating either a recording medium or a recording head to change a relative position, and a first signal for generating a first signal each time the rotation has a predetermined phase. No. 1 generating unit, a reference signal generating unit for generating a reference signal for controlling the rotation, and a first operation mode in which the rotation is started and stopped for each predetermined period and recording or reproduction is performed for each predetermined period. And means for selectively setting a second operation mode for continuously recording or reproducing the rotation, and a first means for comparing the phases of the first signal and the reference signal to control the rotation. A recording or reproducing apparatus comprising: a control unit; and a second control unit that controls the operation of the recording and reproducing unit by counting the reference signal in the first operation mode.