JP3020954B2 - Playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a reproducing apparatus, and in particular, information is stored in a plurality of blocks.
A reproducing apparatus for reproducing the information from the recorded storage means;
About the installation. <Conventional technology> Conventionally, a memory device in which information is recorded in a plurality of blocks.
As a recording / reproducing apparatus for performing recording / reproducing on a stage, for example, an SV
Still image signal recorded on a magnetic sheet called Roppy
There is a device that records and reproduces data.
A first recording and reproducing method for alternately recording and reproducing a plurality of blocks
Continuous with raw mode and one of the blocks
The second recording / reproducing mode for intermittent reproduction, for example,
Source field image signals are one by one.
A file for recording and reproducing two recorded tracks alternately
Frame recording / playback mode and record / replay only one track
There is a field recording / playback mode to be generated. When recording, it was recorded in frame recording mode.
Blocked or recorded in field recording mode
An identification code for identifying whether the block is a block
Has been added. <Problems to be Solved by the Invention> On the other hand, image information stored in a recording medium is stored in a recording and reproducing apparatus.
High-speed update at very short intervals for each image
Raw functions are required. The image information stored on the recording medium is high quality with a large amount of information.
Such as high-quality image information and image information with a small amount of information.
There are often several types. However, a medium storing such multiple types of image information
Accurate high-speed playback of image information recorded on the body without erroneous playback
If you try to realize the function, play it every time the image is updated.
The type of image to be determined
Therefore, the image signal must be reproduced and displayed on a monitor.
No. Therefore, it takes time to determine the type of the image.
Time until the update of the image displayed on the monitor is completed
And the high-speed playback function cannot be used effectively.
In other words, there is a problem that its speed is reduced
There is a risk. In view of such a problem, the present invention is stored in a recording medium.
Slow playback speed due to differences in the amount of image information
The aim is to improve below. <Means and Actions for Solving the Problems> In order to achieve such an object, the reproducing apparatus of the present invention is provided with a predetermined
Recording means of image information of information amount as image information for one screen
Playback mode read out from the memory and the first playback mode
Image information more than one screen worth of information
Switching between the second playback mode and reading as image information
Switching means, the information recorded in the recording means being the first
The image information that can be read out in the raw mode or the second reproduction mode
Discriminating means for discriminating whether the image information can be read out by the code
A predetermined time interval of image information to be reproduced from the recording means;
Instruction means for instructing a continuous change in the computer, a change instructed by the instruction means, and the determination means
Controlling the switching state of the switching means based on the determination result of
Control means, wherein the control means reproduces data according to an instruction from the instruction means.
When the image information to be changed is changed,
Instead, switching the switching means to the first reproduction mode,
Control to change the playback image continuously at predetermined time intervals
It is characterized by doing. <Example> Hereinafter, the present invention will be described in detail with reference to the drawings.
In the embodiment of the present invention, a disc-shaped recording medium,
Typically, a still image video signal is recorded on a disk-shaped magnetic sheet.
Or a recording / playback device that plays back the recorded still image video signal.
Is explained. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention.
is there. In FIG. 1, reference numeral 1 denotes a recording / reproduction track of a video signal in advance.
Track, track pitch, and track position
Magnetic track, wherein the tracks are formed concentrically.
One field of video signal is recorded on one track.
In the case of a frame video signal, each adjacent two tracks
Each one field video signal is recorded and frame video signal
Becomes 2 is a DC motor for rotating the magnetic sheet 1 at a constant speed.
3-1 and 3-2 access two adjacent tracks.
3-1 is the outer peripheral side, 3
-2 accesses the inner peripheral side. 4 is a magnetic head 3-1,3
-2 to access the track formed on the magnetic sheet 1
Magnetic head moving mechanism for moving the magnetic head 5
The magnetic head 3-2 is moved on the magnetic sheet 1 by the moving mechanism 4.
When accessing the innermost track, the status changes from off to on.
The state is switched, and the micro computer (to be described later)
Inner circumference detection that outputs L-level signal to 40)
Switch 6 is detected by magnetic heads 3-1 and 3-2.
Amplifier for amplifying a signal to be amplified,
Level detector for detecting the average value of the output signal from
The output of the level detector 7 is set by a reference voltage source (not shown).
A comparator for detecting whether or not it is higher than a threshold value, 9
Is a demodulation circuit for demodulating the output signal of the reproduction amplifier 6, and 10 is 1 /
The output of the demodulation circuit 9 is output for two horizontal scanning periods (hereinafter referred to as 1 / 2H).
1 / 2H delay circuit for delaying force, 11 is the output of demodulation circuit 9
Synchronization signals such as horizontal synchronization signal Hsync and vertical synchronization signal Vsync
Signal separation circuit for separating the signal, 12 is a synchronization signal separation circuit 11
Playback unsynchronized according to the timing of the synchronization signal separated from the
A predetermined data signal is detected from the output of the
This is a data demodulator that demodulates the signal. Note that the data signal is
There is a predetermined relationship with the part where the
Recorded in the lower frequency band than the video signal
You. Here, the demodulation circuit 9 and the data demodulation circuit 12 are provided separately.
This is done for the following reasons. That is, the magnetic sheet 1
Although the recorded video signal is FM modulated,
Data signal other than signal is DPSK modulation method different from FM modulation
(Defferatial Phase Shft keying)
You. Therefore, the demodulation circuit 9 described above is an FM demodulation circuit and
The data demodulation circuit 12 is a DPSK demodulation circuit. 13 is a monitor that can reproduce and observe video signals
, 13 'are connected to print the video signal.
I'm Linter. The printer 13 'is a start signal input terminal
Operation starts when the signal at
Sets the busy signal output terminal to L level. 14 is data recovery
In contrast to the controller 12, data output from a CPU
This is a modulator that performs PSK modulation.
Hs separated from the video signal
The data modulated at the timing according to
Output to the recording amplifier 16. 15 is FM conversion to the video signal input from the video signal input terminal 18.
Performs the necessary processing for recording the tone and outputs it to the recording amplifier 16
It is a recording amplifier. 19 is a reference signal generator,
The signal generator is a precise reference for rotating the magnetic sheet 1
Generates a pulse (60Hz). 20 is a magnetic piece provided on the magnetic sheet 1 described above.
The signal from the magnetic piece 20 is used as described later.
Synchronized with the reference signal generated by the reference signal generator 19
The rotation control of the DC motor 2 is performed. 21 is magnetic sheet 1
When it is rotated by the DC motor 2, the signal from the magnetic piece 20
This is a PG coil for detection. 22 performs waveform shaping of the signal output from the PG coil 21
The output of the waveform shaping circuit 22 will be described later.
To the CPU 40 and the motor control circuit 23. 23 is a control circuit for controlling the rotation of the DC motor 2.
Vsync from the synchronization signal separation circuit 17 or the
The output signal of the reference signal generator 19 and the output of the waveform shaping circuit 22
Force, i.e., from the magnetic piece provided on the magnetic sheet 1
The phase relationship with the signal is a predetermined relationship, for example, always the phase of both
Control the rotation of DC motor 2 so that
You. Here, the recording operation is performed by the magnetic heads 3-1 and 3-2.
SW1 is switched in advance to the synchronization signal separation circuit 17 side
Vsync and the signal input from the waveform shaping circuit 22
No., that is, from the magnetic piece 20 provided on the magnetic sheet 1
The rotation of the DC motor 2 is controlled based on the signal of
When the reproducing operation is performed by the keys 3-1 and 3-2, SW1 is set to
The reference signal generator 19 is switched to
Input from the reference signal from the generator 19 and the waveform shaping circuit 22
The signal, that is, the magnetic piece 20 provided on the magnetic sheet 1
The rotation of the DC motor 2 is controlled based on these signals. 23 'is a head 3 based on a signal from a CPU 40 described later.
Step motor 24 for controlling the positions of -1, 3-2
A stepping motor 24 is a driver to be driven.
By moving the heads 3-1 and 3-2 via the head moving mechanism 4,
You. 25 'is a display circuit driven by a signal from the CPU 40.
There is a display element, as shown in FIG.
No. of the track that is accessed by heads 3-1 and 3-2
7-segment that displays the feed speed of ridge 3-1 and 3-2
2 digit display element to indicate that it is in the playback mode.
PB.LED, REC.LED to indicate recording mode
It is composed of 26 is a ROM for storing the program of the CPU 40, 27 is a CPU 40
Is temporarily stored in the RAM. 28 for CPU40
The timer 29 is driven by the reference clock of the CPU 40.
Is a crystal oscillator that generates In addition, 80 is the magnetic sheet 1
A detection switch for detecting whether or not
Detection circuits connected to the constituent photocouplers 81 and 82
Road. SW1 is a control circuit driven based on a signal from CPU40.
This switch switches the status according to the signal from the road 30.
Video signal is being input from the video signal input terminal 18.
If Hsync is output from the synchronization signal separation circuit 17,
And the CPU is in recording mode
When a signal is input, the synchronization signal separation circuit 17 and motor control
Circuit 23, and Hsync is output from the synchronization signal separation circuit 17.
Is not input or is in playback mode from CPU40.
Signal is input to the reference signal generator 19 and the motor
The control circuit 23 is connected. SW2 is a switch whose state switches based on a signal from the CPU 40.
Connect the head 3-1 to the recording amplifier 16
State, the state connected to the reproduction amplifier 6, and the recording amplifier 1
6, the intermediate state that is not connected to any of the playback amplifiers 6
Switch. SW3, like SW2, changes its state based on the signal from CPU40.
A switch that switches, and the head 3-2 is a recording amplifier.
16 and the connection to the playback amplifier 6,
Not connected to either recording amplifier 16 or playback amplifier 6
Switch between states. SW4 is used to reproduce video signals from the magnetic sheet 1.
Frame video using both heads 3-1 and 3-2
When reproducing the signal, switch to the upper side in FIG.
, That is, a state connected to the demodulation circuit 9.
The field video signal using only the head 3-1.
If it is produced, it can be switched upward in Fig. 1.
State and the state switched to the lower side, that is, the demodulation circuit 9
The connected state and the state connected to the 1 / 2H delay circuit
By CPU40 so that it can be switched alternately for each field
It is a switch that can be driven. SW5 connects the monitor 13 to the video signal input terminal 18 during recording.
During playback, connect the monitor 13 to the CPU 40 so that the monitor 13 is connected to SW4.
It is a driven switch. By the way, recording on or from the magnetic sheet 1
The video signal to be reproduced has only one field as described above.
Yield video signal and two fields are paired
There are cases where the frame video signal is composed,
Switching of SW2, SW3, SW4, and SW5 in
This will be described with reference to FIG. Fig. 2 shows the combinations of the switching states of SW2, SW3, SW4, and SW5.
FIG. SW2 plays head 3-1 in field playback
SW3 is connected to the amplifier 6, and SW3 is in the intermediate state, that is, the head 3-
2 not connected to playback amplifier 6 or recording amplifier 16
SW4 is directly modulated from the demodulation circuit 9 in the odd field.
Outputs a signal to the monitor 13 and delays it by 1 / 2H for even fields.
Field to output signal to monitor 13 via path 10
It is alternately switched every time to prevent the occurrence of skew distortion. Next, in frame playback, SW2 is an odd field
Connects the head 3-1 to the reproducing amplifier 6, and
SW3 is in the intermediate state, and SW3 is in the intermediate state in the odd field.
State, and play the head 3-2 in the even field.
Connect to amplifier 6. Therefore, when playing back a frame,
Either of signals 3-1 and 3-2 alternates for each field
Is output to the reproduction amplifier 6. In this case, SW4 has been switched to the upper side in FIG.
The signal from the adjustment circuit 9 is directly output to the monitor 13. Note that in any of the above-mentioned field playback frame playback states
Also, SW5 is driven so that monitor 13 is connected to SW4.
You. Next, in field recording, SW2 switches head 3-1.
Connected to the recording amplifier 16, SW3 is in the intermediate state. Therefore, at the time of field recording, the head 3-1 is used.
A record is made. In frame recording, SW2 is an odd field.
Connects the head 3-1 to the recording amplifier 16 and
SW3 is in the intermediate state, and SW3 is in the intermediate state in the odd field.
State, and in the even field, record head 3-2.
Connect to amplifier 16. In frame recording, head 3
The combination of -1,3-2 can be reversed. Also, in either case of field recording or frame recording
SW5 connects the monitor 13 to the video signal input terminal 18
Observe video signals to be recorded on the monitor 13 by connecting to
Switch as you can. If so, which SW4
It may be in such a state. Next, switches 51 to 63 and 72 shown in FIG.
I will tell. In making such a description, the book shown in FIGS.
The appearance of the apparatus of the embodiment will be described together. FIG. 3 is a front view of the apparatus of this embodiment, and FIG.
Front view of a remote control device used for various devices
It is. Switches 51 to 63 and 72 shown in FIG. 1 are shown in FIG.
Switch group provided in the apparatus shown in FIG.
Switch group provided in the mote control device,
The device shown in FIG. 3 and the remote control shown in FIG.
Switch group provided in any of the troll devices
Although the switches have the same function,
1 to 4, the same reference numerals are given. In addition, in FIG.
FIG. 1 shows a switch provided in the apparatus shown in FIG.
In the remote control device shown in FIG.
The switch provided is connected to the CPU 40 via a line.
Although shown as a continuation for convenience, such a fourth
Only the remote control device shown in the figure is provided.
The signal generated by operating the switch
Converted to infrared light by the mote control device, and Fig. 3
Such a device is provided via a remote control light-receiving unit 45 provided in
Input to the CPU 40. Note that the method of arranging the switches 51 to 63 and 72 is the same as in this embodiment.
Various other modifications of the example are possible and are not limited to this embodiment.
Not something. 1 to 4, reference numeral 41 denotes a power switch, and reference numeral 42 denotes a power switch.
The slot 42 for inserting the magnetic sheet 1 is used as the slot 42.
When the magnetic sheet 1 is inserted into the
When the button 43 is turned on, it opens automatically and the magnetic sheet 1
Be ejected. 43 is the inject button, 44A, 44
B is the above-mentioned PB.LED, REC.LED, and 45 is the relay shown in FIG.
Remote control receiver for receiving signals from the remote controller
Light, 46 lights when interval playback is set
Interval mode LED, 48 for field playback
Or recording, frame playback or recording
The display LED that indicates whether it has been set, 25 is the 2-digit 7
The segment LEDs, 50A, 50B, and 50C are each
Raw setting switch 58, interval time setting switch 57,
Displays the operation status of the program track setting switch 62.
LED. 51 sets the recording mode, and
The track accessed by the head is recorded or unrecorded.
REC mode switch for confirming
The tiger that the head is accessing when the switch is turned on
If the tack has already been recorded, (Head 3
If the track accessed by -1 is already recorded,
Heads 3-1 and 3-2 are accessed at the time of recording
REC.LED is lit when either track is recorded)
And the track accessed by the head is not recorded.
Indicates that it is possible, and if not recorded, REC.LED
Lights up to indicate that recording is possible. 52 is an REC switch that determines the timing for performing the recording operation.
Switch and the recording mode is set by the REC mode setting switch 51.
Switch 52 is set to ON.
At this time, recording is performed on the magnetic sheet 1. More later
Continuous by the track feed speed setting switch 56
When the record is set, the switch 52 is turned on.
While heads 3-1 and 3-2 are automatically shifted during
Then, continuous recording is performed. 53 is a PB mode setting switch for setting the playback mode
When the switch 53 is turned on, the playback mode is
The PB.LED that indicates that the LED is on is lit. Reference numeral 54 denotes a track UP switch, and the switch 54 is operated.
To rotate the step motor 24 to the driver 23 '.
The head 3-1, 3-2 by the head moving mechanism 4.
To shift heads 3-1 and 3-2
And move the track accessed by the head further inward.
Change direction. The field / frame setting switch described later
Frame recording or playback is set by switch 59
When the track UP switch 54 is turned on, the head
3-1 and 3-2 are shifted by 2 tracks each, and
Track 25 which is shifted one track at a time
1 track shifted by 2 tracks instead of members
The number is displayed, and field recording or playback is set.
Track UP switch 5 is turned on when set
And heads 3-1 and 3-2 are shifted in the inner circumferential direction by one track.
And the 7-segment LED25 shifts one track at a time.
The displayed shift number is displayed. Also, when the recording mode is set,
The heads 3-1 and 3-2 are closed by operating the switch UP switch 54.
The heads 3-1 and 3-2 were accessed when the
If the track has been recorded, REC.RED4B will display
U. 55 is the head 3-1, contrary to the track UP switch 54.
Change the access of 3-2 to the outer peripheral direction
This is a track down switch. The switch 55 also has a frame similar to the track UP switch 54.
If recording or playback is set to
When the switch 55 is operated, one track is applied to the 7-segment LED 25.
2 tracks instead of shifted track numbers
The track numbers that have been shifted are displayed one by one.
If the switch is set to record or play back
Tracks shifted one track at a time when H55 was operated
Number is displayed. Also described in the track up switch 54 described above.
This is the case when the recording mode is set in advance
The head 3-1 is operated by operating the track DOWN switch 55.
Tracks accessed when 3-2 was shifted are recorded
REC.RED4B blinks when it has been completed. 56 is the head operation for recording and playback.
Whether to perform automatically and continuously while moving
Switching, and if it is more continuous, how many times per second?
Set the track feed speed that indicates whether to perform
This is a switch for setting the track feed speed. When the switch 56 is pushed in once and turned off from on,
7-segment LED25 has a track number instead of a track number.
The rack feed speed is displayed.
Within a predetermined time clock by the timer 28 shown in FIG.
When the rack feed speed setting switch 56 is turned on,
Each time the switch 56 is turned on, the 7-segment LED 25 is compared.
For example, continuous recording or playback of two screens per second
Show To perform continuous recording or playback of 5 screens per second
Show To record or play back 10 screens per second
Show Indicates that recording or playback is performed sporadically Is displayed cyclically. Also switch on switch 56
And then turn off to switch to 7-segment LED25.
The track feed speed is displayed instead of the track number.
Switch 56 is not turned on again
When the clocking of the predetermined time is completed, the LED 25
From the state where the feed speed is displayed,
Returns to the state where the member is displayed. In addition, the track feed speed is increased by the switch 56.
When changing, the field / frame setting
Frame by switch 56 and REC mode setting switch 51
10 screens per second when video recording is set
No record is set. 57 is an interval time setting switch. Ie continuous
Playback, but playback time is relatively long
When performing tarball playback or using the program settings described later
When program playback is set by the constant switch 58
The track sending interval time
Time setting switch for the
Within 10 seconds after the switch is turned on,
Set the interval time with the switch. Incidentally, the interval time setting switch 57 is turned on.
After that, switches other than 10 key switches 63 to 72 are turned on.
In such a case, the interval time setting is automatically canceled.
58 sets the playback track order in advance and
The interval set by the time setting switch 57
Program that performs continuous playback at intervals
This is a program setting switch for setting the raw mode.
You. To specify the order of the playback tracks, first turn on the switch 58.
To set the program playback mode, then
Operation of the track UP switch 54 and the track DOWN switch 56
Traps accessed by heads 3-1 and 3-2 by
Change the track and play the video of the desired track.
While checking the program track setting
Checking on monitor 13 by turning on switch 62
This is done by storing the track number of the track.
59 is the field / frame setting switch described above,
Field recording or playback every time the switch is turned on
Mode alternates between frame recording or playback mode.
Be replaced. REC mode setting switch 51 and track feed speed
Continuous setting of 10 screens per second in advance by mode setting switch 56
When the recording mode is set, the field / frame
When frame recording is selected by the
Is a track feed speed of 5 screens per second.
Is automatically changed to the mode. That is, 1 is greater in frame recording than in field recording.
The heads 3-1 and 3-2 must be shifted by two tracks each time.
1 second when recording 10 screens per second
Requires a 20 track head shift, but
Since it is difficult to shift the head quickly, one second is used in this embodiment.
In the meantime, continuous recording of frames for 10 screens is prohibited. 60 is interval continuous playback or program playback
Is a start switch for performing
When the switch is turned on, interval playback is set.
When playback is in progress, playback starts from the first track at intervals
Set with interval setting switch 57 and numeric key switches 63 to 72
Interval playback starts according to the set interval time.
Is started and program playback is set.
Playback starts. 61 is opened by start switch 60
This is a stop switch that stops the started playback operation.
When the switch 61 is turned on during program playback.
Automatically has the track set at the beginning of the program
Will be played. Reference numeral 62 denotes the aforementioned program track setting switch. Next, using the flowcharts of FIG. 5 to FIG.
The operation of the embodiment will be described. First, when the power switch 41 shown in FIG.
When the power supply of the device shown in FIG. 1 is turned on, power is supplied to each part of the circuit.
It is supplied and the operation is started. # 1: Then, the register IS described later in FIG. 15 becomes “0”
Reset, PB mode flag is set, and track
Feed speed 2 screens per second, interval time 3 seconds
Initially set to Therefore, when the power is turned on,
The continuous playback mode is automatically set in advance. # 2: the jacket with the magnetic sheet 1 is pushed in
Is detected. When the jacket is pushed in
The flow branches to # 3, skipping # 3 when not pushed
Then it branches to # 4. # 3: In # 2, the jacket having the magnetic sheet 1 is pressed.
When it is turned on, the DC motor 3 is driven. # 4: Whether or not the switch 5 shown in FIG. 1 is turned on
Is detected, the heads 3-1 and 3-2 are moved to the 50th track.
Detects whether the track is being accessed and
When the head is accessing to, the flow branches to # 6
And the head 3-1 does not access the 50th track.
In this case, the flow branches to step # 5, and the steps shown in FIG.
By driving the motor 24, the head 3-1 accesses the 50th track.
Loop # 4 and # 5 as if to access. # 6: When head 3-1 accesses track 50
The flow reaches this step, and in this step
Register N for accessing memory (RAM27) is set to 5
Set to 0. # 7: Is DC motor 2 driving at this step
Detect whether or not. A jacket having the above-described magnetic sheet 1
When the data is inserted, 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. The jacket is
When it is not inserted, the flow does not go through # 3 described above.
DC motor 2 is not driven to proceed. Therefore Jia
The flow is # 2 to detect whether or not a packet is inserted.
Return to # 8: When the DC motor 4 is driving in # 7,
Field flag is set. Therefore, it is shown in FIG.
The LED 44A indicating the field mode lights up, and the
A display indicating that there is is provided. That is, in this embodiment,
Is turned on when the power is turned on and the jacket is inserted.
The default mode is set automatically. # 9: Detect the output of the level detection circuit 7 shown in FIG.
The track accessed by head 3-1 is already recorded
It is determined whether it is a track or not. Here, head 3-1 is
Level detected because the track being accessed has been recorded
When the output of the circuit 7 becomes H level, the flow proceeds to # 10.
When the output of the level detection circuit 7 goes low,
Low goes to # 16. Here, # 16 will be described first. # 16: “0000” is set to address N of the memory. here
“0000” indicates no track corresponding to the address of the memory.
Record. Next, the flow after # 10 will be described. # 10: The output of the level detection circuit 7 is at the H level in # 9
In this case, the signal recorded on the track is reproduced and
The ID signal is taken in from the data demodulator 12. # 11: The content of the ID signal is detected and recorded on the track
Video signal is a field video signal or a frame video signal
It is determined whether it is a number. Here is a field video signal
Goes to # 15 if the frame video signal
The flow proceeds to step # 12. # 12: Head 3-1 is accessing in this step
The video signal of the track
It is determined whether it is a track or an outer track. Inside
If it is, the flow proceeds to # 14. outside
If it is a track, the flow proceeds to # 13. # 13: Track image accessed by head 3-1
If the signal is a track outside the frame video signal,
The address of Molly is set to "0011". # 1
When the first step is taken, N is 50 in # 6.
Is set to # 14: Note in case of inner track of frame video signal
Lee's N address is set to "0010". # 17: Head 3-1 is now shifted to the first track
When it is detected that N = 1, the flow proceeds to # 20.
The flow advances to # 18 if N = 1 is not satisfied. # 18: When it is detected that N is not 1 in # 17
Shifts the head 3-1 by one track toward the outer periphery. # 19: Head 3-1 is shifted to the outer peripheral side in # 18
In this case, N is subtracted from N. # 20: If N = 1 is detected in # 17, that is,
3-1 activates the first track provided on the outermost circumference.
When the memory status is set in the memory
Here, the address of memory N, that is, the data of address 1
If the data is "0011", the first track
Are the outer tracks of the two tracks constituting the frame video signal.
If so, the flow proceeds to # 21, otherwise
In this case, the flow proceeds to # 23. # 21: In # 20, the first track outputs a frame video signal.
Detected that the track was outside the track to be configured
If so, the flow proceeds to this step. This
At step N + 1 of the memory, that is, the memory
If the data at address 2 is read and is "0010",
In general, the second track is a two-track signal constituting a frame video signal.
If the track is inside the rack, the process proceeds to step # 22. # 22: First track, second track, two tracks
This step is performed when the video signal is recorded.
Move on to Therefore, the field set in # 8
Clear the lag and set the field mode to frame mode
To change. Therefore, the field shown in FIG.
The frame display LED 48 indicates that the frame mode is set.
Lights up. # 24, # 24: The register N indicating the address of the aforementioned memory is
Displayed on 2-digit 7-segment LED 25 shown in Fig. 1 and Fig. 3
Let it. By this display, the tracing head being accessed by head 3-1 is displayed.
The user can recognize the Tsuku number. When this flow is completed, the flow shown in FIG.
Pump. The flow chart shown in Fig. 6 below
explain. # A-1: REC mode setting switch 51 is on
Is detected, and when the switch 51 is turned on,
Calls a subroutine, sets the recording mode, and turns on
If not, proceed to # A-2. # A-2: It is detected whether the REC switch 52 is turned on and
When switch 52 is on, call the subroutine.
If it is not turned on, the process proceeds to # A-3. # A-3: Check whether the PB mode setting switch 53 is turned on.
When the switch 53 is turned on,
Call Chin and go to # A-4 when not turned on
move on. # A-4: When the track UP switch 54 is turned on,
Calls a subroutine, and when it is not turned on
Proceeds to # A-5. # A-5: When the track DOWN switch 55 is turned on,
Row calls a subroutine and is not
Proceeds to # A-6. # A-6: Track feed speed setting switch 56 is turned on
When the flow is called the subroutine is turned on
If not, proceed to # A-7. # A-7: The interval time setting switch 57 is turned on
Subroutine is not turned on when
In this case, the process proceeds to # A-8. # A-8: When the program setting switch 58 is turned on
When the subroutine is not turned on
Proceed to # A-9. # A-9: The program track setting switch 62 is turned on.
Call the subroutine when
If so, proceed to # A-10. # A-10: Field frame setting switch 59 is turned on
When a subroutine is called
If not, proceed to # A-11. # A-11: When start switch 60 is on
#A when the subroutine is not called
Proceed to -12. # A-12: When the stop switch 61 is on
#A when the subroutine is not called
Proceed to -13. # A-13: Jacket detection switch (detection circuit 8 in FIG. 1)
(Equivalent to 0) is not turned on
Jump to O and proceed to # A-14 when it is on
No. # A-14: Program playback mode flag and program
Clear the playback in progress flag. As described above, the flow shown in FIG.
3-1 was made to access the first track of the magnetic sheet.
After that, the process jumps to the flow shown in FIG.
Detects the status of each switch shown in FIG. 3, FIG. 3 and FIG.
While switching the status of each switch.
Rows are repeatedly executed, and the service according to the operated switch is performed.
Call the routine. Here, the track feed speed setting switch 56 is turned on.
Subroutine called in the event of a hit
This will be described with reference to FIG. FIG. 7 shows a switch for changing the track feed speed.
Flow chart showing the subroutine executed when 56 is turned on
It is a chart. # F-1, # F-2: Track feed speed from memory
The set value is read out, and the set value is used as a track number (not shown).
-Set in the display buffer. Therefore, the 2-digit 7-segment LE shown in FIG.
The track feed speed is displayed on D25. For the first time this
When the flow arrives at the step, it is performed every second in # 1
As a result, the 2-digit 7-segment LED 25 shown in FIG.
The track feed speed is displayed. This is the first time
When a flow comes to the screen, a two-screen
Since the rack feed speed is set Is displayed. # F-3: Track feed speed setting switch 56 is on
In some cases, the flow repeats # F-3, and the switch 56
Is turned off, the flow moves to # F-4. As described above, the track feed speed setting switch 56
Once turned on, 2-digit 7-segment shown in Fig. 3
In the LED 25, the track number is displayed.
The display switches to the rack feed speed display.
Then, by turning on the switch 56 again, the track
The feed speed is configured to be switched. # F-
3 indicates that the switch 56 is turned on once and then turned off once as described above.
The first time it is turned on again,
It is provided so that the mode is switched. # F-4 to # F-
7, the track feed speed setting switch 56 is turned on,
The display of the 2-digit 7-segment LED 25 shown in FIG.
From display of track number to display of track feed speed
During a predetermined time (2 seconds) after switching, the switch 56
Or, if no other switches are turned on,
It is provided to stop setting the feed speed
It is a step. After the timer 1 starts counting
Track feed speed setting switch during fixed time (2 seconds)
When switch 56 is turned on, flow from # F-7 to # F-10
The timer advances and when the timer is completed or when another switch is
When switch is turned on, flow from # F-6 to # F-8
Advances. # F-8: Clear the count value of timer 1. # F-9: Contrary to # F-1, the two-digit seven-sequence shown in FIG.
Segment LED25 to track number again
Let it return. # F-10: The count value of the timer 1 is cleared. # F-11: Track feed speed set value is single
(Once recorded or played back, field mode
The head is shifted by one track, and 2 in frame mode.
Stop by shifting the head by the amount of the track)
Is detected, and in the case of a single, the flow proceeds to # F-12.
If not, the flow proceeds to # F-13. As described above, after the power switch 41 is turned on,
If the flow reaches this step, the flow goes to # 1 in advance.
Two screens per second are set as the track feed speed.
You. # F-12: Track feed speed set value is single
In this case, 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: Track feed speed set value is 2 screens per second
And if there are two screens per second, go to # F-14
If it is not 2 seconds 2 screens, the flow proceeds to # F-15. # F-14: Set the track feed speed to 5 screens per second
Change to # F-1 and change the track feed speed
And # F-3 to # F-7 described above are executed. # F-15: Track feed speed set value is 5 screens per second
And if there are 5 screens per second, go to # F-16
If not 5 screens per second, that is, 10 screens per second are set
In this case, the flow proceeds to # F-17. # F-16: Check whether the PB mode flag is set
Determine. When the PB mode flag is set
If the playback mode is set, go to # F-18 in PB mode.
Is reset, i.e., the recording mode is
If it has been set, the flow proceeds to # F-19. # F-17: Change the track feed speed set value to single
Then, return to # F-1, and change the track feed speed.
Is displayed, and the above-described steps # F-3 to # F-7 are executed. # F-18: Track of magnetic sheet 1 in playback mode
The video signal recorded in the field is the field video signal.
And field video signals
Do. Therefore, in such a case, the track feed speed
Change the code setting value to 10 screens per second, and flow is # F-1
Return. # F-19: Whether or not the field flag is set
And if the field flag is set,
That is, a track feed of 10 screens per second is set in the recording mode.
And in the field mode, flow to # F-18
Branches. If the field flag is not set,
Set track feed speed of 10 screens per second in recording mode
# F-17 when the value is set and in the frame mode
The flow proceeds to track feed speed set value.
Change to Therefore, in the subroutine described above,
When the feed speed setting switch 56 is turned on, the
Tracks are sent to the 2-digit 7-segment LED 25 shown in FIG.
Speed is displayed, and the speed is displayed within a predetermined time (2 seconds).
Track feed by turning on switch 56 again
Speed is changed. Also, such a change range is set in the frame recording mode.
Single, 2 screens per second, 5 screens per second
Single mode, 2 screens per second, every second
There are four types, five screens and ten screens per second. The range of the change is the head 3-1 and 3-2 shown in FIG.
Related to the track shift capability of the moving mechanism, etc.
Therefore, it is set in advance in an appropriate range according to the track shift capability.
Is defined. Next, the subroutine shown in FIG. 6 will be described with reference to FIG.
During execution, the track UP switch 54 and the track DOWN switch
Subroutine called when switch 55 is turned on,
Will be described. First, the track UP switch 54 is turned on.
The following describes the flow that is called when a call is made. # D-1: When the flow reaches this step, head 3
-1 is the innermost track
Detecting whether register N is 50 or not
Is determined by 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: Determine whether the PB mode flag is set
Separate. When the PB mode flag is set,
In raw mode, the PB mode flag is set to # D-8.
If not, ie, in the recording mode, flow to # D-3
Goes on. # D-3: The address N + 1 of the memory is "0000", that is, the (N + 1) th
Detects whether the track is unrecorded, and if not
If the data is already recorded in # D-4, the flow goes to # D-7.
Diverge. # D-4: The fact that the (N + 1) th track has not been recorded is #D
If it is determined to be -3, the field is set in this step.
Determine whether the lag is set or not
To # D-6, if not set, to # D-
The flow proceeds to 5. # D-5: The field flag is set at # D-4.
Was not set, and it was determined that the camera was in frame mode.
Sometimes this step is reached. In this step,
Check if the N + 2nd content of Molly is "0000"
When it is detected and "0000", that is, when the (N + 2) th track is
If not recorded, go to # D-6, not "0000"
When the N + 2 track is already recorded,
The flow proceeds to # D-7. By executing steps # D-3 to # D-5,
In frame mode, two consecutive tracks are both
If not recorded, go to # D-6 for 2 consecutive tracks
If at least one of them has been recorded, # D-
The flow proceeds to 7. # D-6: In the field mode, head 3-1 is activated.
Track, head in frame mode
3-1. The track being accessed and the track
1 track 3-2 to the inner circumference of 1 track
Accessed track is unrecorded, that is, recordable
In this case, the flow reaches this step, and the RE shown in FIG.
C LED44B lights up. # D-7: Contrary to # D-6, heads 3-1 and 3-2 are activated.
The track to be accessed and recorded has already been recorded.
When the REC LED44B shown in FIG.
User) that it is impossible to record
A warning is displayed so that is recognized. # D-8: The PB mode flag is set at # D-2.
If so, the flow reaches this step and the field
Set the default flag. For the meaning of the steps, see # D-9, # D-10, #
This will be described in D-13. # D-9: The address N of the memory is described as "0011", that is, # 13.
The track accessed by head 3-1 is
Out of the two tracks constituting the video signal
Detects whether the track is a track or not and detects the outer track of the two tracks.
If it is a rack, go to # D-10 and use the track on the outer
If not, the flow proceeds to # D-13. # D-10: N + 1 address of memory is "0010", that is, head
The track accessed by 3-2 is a frame video signal
Is the inner track of the two tracks that make up
No, it is a track on the inner peripheral side of the two tracks.
In this case, go to # D-11. If it is not the outer track, # D-11
The flow proceeds to -13. That is, of the two tracks that make up the frame video signal,
The peripheral track is erased, or a new video signal is
Is recorded, head 3-1 is accessing.
The two tracks whose tracks make up the frame video signal
Even if the track is on the outer circumference side, the head 3-2 is accessed.
The track on the inner side of the two tracks
What happens is not. Therefore, in this case the head
When shifting 3-1 and 3-2 to the inner circumference side, one track
Shift only the touch and delete or erase the image after erasing.
It is necessary to reproduce the track on which the image signal has been recorded. When
In the case where the rollers roll, the heads 3-1 and 3-2 are
When only the hook is shifted inward, the head 3-1 and the head 3-1,
The frame video signal is sent to the track accessed by 3-2.
Are not always recorded, and each field is completely different
Video signals may be recorded in some cases. In this case
If the field flag is reset, two separate
Video signal is played back as a frame video signal.
Problem arises. Therefore, the above-mentioned # D-8
By providing the step, in this embodiment, the head is reduced.
When shifting to the inner circumference side,
By setting the field flag
Mode to set a completely different
When the old video signal is played back as a frame video signal
Can be solved. # D-11; In this step, 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; 2 accessed by heads 3-1 and 3-2
When a frame video signal is recorded on one track
Then, the flow reaches this step. Such records have been made
This switch when the track UP switch is turned on.
Shift heads 3-1 and 3-2 for one track in step
The driver 23 is driven so that the
Is shifted one track head 3-1 and 3-2.
Let As described above, shift the heads 3-1 and 3-2.
N is updated one by one every time it is switched. # D-13; Heads 3-1 and 3-2 are set to 1 as in # D-12.
Track shift. # D-14: As in # 23, N is a 2-digit 7-sec
Segment LED25. In this embodiment, such steps are referred to as # D-12 and # D-13.
Heads 3-1, 3-2
Frame video signal is recorded on the track being accessed
Track number displayed on LED 25
Is updated by two, and the field video signal is recorded
In some cases, the track number displayed on LED 25 is
Will be updated and the field image will be displayed on the magnetic sheet 1.
Indicates whether an image signal or a frame video signal is recorded.
Can be shown. This step is also provided between # D-12 and # D-13.
When the heads 3-1 and 3-2 are accessed
Frame signals are recorded on the two tracks
When the track UP switch 54 is turned on even if the
Track numbers displayed on D25 should be updated one by one.
And # D-15: Determine whether PB mode flag is set
Set. If it is set, set it to # D-16.
If not, the flow branches to # D-19. # D-16: Address N of the memory is "0011" Head 3-1 is
The track being accessed is recorded as a frame video signal.
Whether the track is on the outer side of the track
judge. Here, N is a head as described above.
After moving heads 3-1 and 3-2, head 3-1 is
It corresponds to the number of the track being accessed. This
If the content is "0011" at address N in the memory,
If the flow is not "0011" to # D-17, go to # D-19
The flow branches. # D-17: The content of address N + 1 in the memory is "0010", that is,
Track accessed by head 3-1 is framed
Inner track of two tracks where image signals are recorded
Is determined. Here, when address N + 1 of the memory is "0010"
Is the flow to # D-18, and if not "0010", # D-1
Branch to 9. # D-18; # D-16, # D-17 via this step
When the flow reaches, the heads 3-1 and 3-2 have moved.
Two tracks accessed later have frame video signals.
# D-8 was set because the number was recorded
Clear the field flag and set the frame playback mode and
I do. # D-19: In this step, the automatic track feed
Determines whether the lag is set,
# D-20 when not present, and when set
Return from subroutine (RTS). The automatic track feed flag is set in a subroutine described later.
This flag is set and automatically sends the track.
Running a program that repeats playback while playing
When calling a subroutine or
Is provided to get out of the routine. # D-20: Track feed speed set value from memory
take in. # D-21: Track feed speed set value is single
It is determined whether or not there is, and in the case of a single, to # D-34,
If not single, the flow branches to # D-22. # D-22: Track feed speed set value is 2 screens per second
Is determined as to whether or not the number is two, and in the case of two screens per second, # D-23
, If not 2 screens per second, the flow branches to # D-24
I do. # D-23: Set the WAIT TIMER register in CPU 40 to 28.
Set. # D-24: Track feed speed set value is 5 screens per second.
It is determined whether or not there is, and in the case of 5 screens per second, # D-25
If not 5 screens per second, flow branches to # D-26
I do. # D-25: Set the WAIT TIMER register to 10. # D-26; 10 images per second as track feed speed setting value
If a surface has been set, the flow will reach this step.
Set the WAIT TIMER register to 4. In addition, the WA set in # D-23, # D-25, and # D-26
IT TIMER register controls the track feed speed
# D-31 and # D-32 to be described later.
And each time the magnetic sheet 1 makes one rotation by the DC motor 2
Is calculated. # D-27: Determine whether or not the REC execution flag is set
When set, it is set to # D-28,
If not, the flow branches to # D-31. Here REC
The flag is a flag set in the subroutine.
Yes, repeat recording while sending tracks automatically.
A subroutine is called during execution of a program
# D-2 from the WAIT TIMER register set when the
9, by subtracting 2 or 5 in # D-30
The time required for recording.
Have been killed. That is, in the recording mode, the magnetic sheet 1
The signal to be recorded by detecting the rotation state of
Timing for recording from a predetermined position on a magnetic sheet
Recording and recording a signal on the magnetic sheet 1
It is provided for. # D-31; pulse from reference signal generator 19 shown in FIG.
The presence or absence of a pulse is detected. If there is a pulse, # D-
To 32, if no branch, repeat the flow of # D-31
You. # D-32; subtract 1 from the contents of the WAIT TIMER register
You. # D-33: Whether the contents of the WAIT TIMER register has become 0
And if it is 0, it goes to # D-34.
Branches to # D-31. In steps # D-32 to # D-33, track feed is performed.
Set a timer to control speed in the WAIT TIMER register.
And a reference signal generator 19. Therefore WAIT TIME
The contents of the R register are used to shape the output of the PG coil 21.
The timer is configured by subtracting according to the exit of the shape shaping circuit 22.
A more accurate and stable clock operation than
Can be. That is, the output of the PG coil 21 is
There is a possibility that errors may occur due to the cause of uneven rotation.
The output of the signal generator 19 has substantially no such error. Also
Power consumption when performing interval playback or recording
Stop DC motor 2 rotation during interval time to save energy
Is desirable. When performing such operations, the waveform shaping circuit
To subtract the WAIT TIMER register according to the output of route 22
The law does not allow the interval time to elapse, but this book
Even if such an operation is performed according to the method of the embodiment,
Clocking operation can be performed. # D-34; Check whether the REC in progress flag is set
Judgment, and if set, call this subroutine.
Return of original program (RTS) is not set
When it does, it branches to # D-35. # D-35; Track UP switch 54 is ON
It is determined whether or not the head is turned on.
Shift the tracks being accessed by 1, 3-2 to the inner circumference
# D-1 to turn off
The flow branches to −36. # D-36; Track DOWN switch 55 is ON
It is determined whether or not the head is ON when the head is ON.
Shift the tracks being accessed by 1, 3-2 to the outer peripheral side.
Off at # E-1 in the subroutine
Return to the program that called the subroutine
You. Next, it is executed when the track DOWN switch 55 is turned on.
The subroutine to be executed will be described. Each step # E-1 to # E-13 of the subroutine is a husband
Same as each subroutine step # D-1 to # D-13
Since these steps are the same, detailed description is omitted. However, in the subroutine, the track DOWN switch 55 is off.
Heads 3-1 and 3-2 are accessing when
To shift the track toward the outer circumference, for example,
In step # E-9, it is detected whether N = 1.
Molly (N-1) battery is "0010", ie, the (N-1) th
The track is the inside of two tracks that make up the frame video signal.
Track is detected, and in # E-10, the
The address of Molly (N-2) is "0011", that is, the (N-2) th
The clock is outside the two tracks that make up the frame video signal.
Track or not, and in # E-11, N
= E = 2, # 1 in # E-12 and # E-13
The heads 3-1 and 3-2 for the track are shifted toward the outer circumference.
You. Next, a field / frame switching switch will be described with reference to FIG.
When the REC mode setting switch 51 is turned on.
The subroutine to be issued will be described. # J-1; the field / # in # A-10 shown in FIG.
It is detected that the frame switch 59 has been turned on.
When the flow proceeds to this step,
#J if the field flag is set
-2, if not set, flow to # J-4
Branch. # J-2; The field flag is set at # J-1.
If this is the case, the field flag is cleared in this step.
Is done. # J-3: Determine whether the PB mode flag is set
When set, set to # J-8.
If not, the flow branches to # J-5. # J-4; Field flag is set in # J-1
If it is detected that there is no
Field flag is set. When the PB mode is not set, that is, in the recording mode
In some cases, the field flag is
When cleared, the mode switches to the frame recording mode,
10 screens per second as described in
You can not feed. So in the subroutine
To switch from field mode to frame mode
In some cases, a track feed speed of 10 screens per second
If the feed speed is set,
Replacement must be prohibited. Therefore, according to the present embodiment, # J-6, described next,
Track speed of 10 screens per second is set by # J-7.
When set, the track feed speed setting value
Is automatically changed to a track feed of 5 screens per second. # J-5: Import the track feed speed setting value to CPU40
No. # J-6; Track feed track taken in # J-5
If the speed setting value is 10 screens per second, go to # J-7,
If it is not 10 screens per second, the flow branches to # J-8
You. # J-7: Change the track feed speed set value to 5 screens per second.
Change. # J-8: Field / frame setting switch 51 is turned on.
If you continue, repeat this step, from on to off
For the first time, the step indicated by # A-1 in FIG.
Return to Next, when the REC mode setting switch 51 is turned on,
The subroutine to be issued will be described. # B-1; REC mode setting at # A-1 shown in FIG.
When it is detected that the constant switch 51 is turned on,
The flow branches to the top, and the PB and LED44A shown in FIG.
The light turns off and the PB mode flag is cleared. # B-6 '; REC mode setting switch 51 is kept on
Repeat this step while the switch is off.
When this is done, the flow branches to # B-7. # B-7: When the REC mode setting switch 51 is turned off
In this step, the field flag is set
Whether the field flag is set
In this case, the flow returns to the step indicated by # A-1 in FIG.
Subfield when the field flag is not set.
Jump to # J-5 of the routine, # J-6 to # J-
8, the track feed speed set value is
At 10 screens per second, it is automatically corrected to 5 screens per second.
Therefore, the REC mode is set by the REC mode setting switch 51.
Is set and the mode is frame mode,
The feed speed setting is limited to a maximum of 5 screens per second. Next, referring to FIG. 10, the PB mode setting switch 53 is turned on.
Subroutine called when
You. # C-1; PB mode setting in # A-3 shown in FIG.
When it is detected that the switch 53 is turned on, this step is performed.
The flow branches to the tip, and the field flag is set once.
It is. That is, heads 3-1 and 3-2 are accessing 2
Each track has a separate field video signal recorded
The PB mode flag is cleared and the field flag is
If the reset frame recording mode is set
The PB mode setting switch 53 is turned on.
Tracks that are accessed and accessed by heads 3-1 and 3-2
Playback immediately, a separate field video signal is input.
In order to prevent the terrace from being reproduced
In this step, the field flag is set once.
It is. # C-2: The address of the memory is "0011", that is, the address of the head 3-1.
The track being accessed does not record the frame video signal.
Detects the outer track of two tracks
If it is "0011", then go to # C-3 if it is not "0011".
The flow branches to # C-5. # C-3: The address of the memory N + 1 is "0010", that is, the head 3-2.
The track being accessed is recorded with a frame video signal
The inner track of the two tracks
If it is "0010", then go to # C-4 if it is not "0010".
The flow branches to # C-5. # C-4; heads 3-1 and 3 in # C-2 and # C-3
-2 frame video on two tracks accessed
When a signal is detected to be recorded, the flow is
When this step is reached, the field flag is cleared
The frame mode is set. # C-5; PB and LED44A shown in FIG.
The flag is set and the reproducing operation is started. # C-6: PB mode setting switch 53 is kept on
This step is repeated when
The process returns to # A-1 via # A-14 shown in FIG. Next, an interval time setting switch 57 will be described with reference to FIG.
Subroutine called when is turned on
explain. First, in such a subroutine, a timer
-T 'is initialized to 0. # G-1: Set interval time in # A-7 in FIG.
When switch 57 is detected to be on,
The marker T 'is initialized to 0 and then the flow proceeds to this step.
-When the 10 key switches 63-72 are turned on
To # G-2, when the 10 key switches 63 to 72 are not turned on
Then, the flow branches to # G-3. # G-2: Set the interval time Ti to 10 key switches 63 to 72
Change to the set interval time Ti. # G-3: Switches other than the 10 key switches 63 to 72 are turned on.
It is determined whether or not the switch has been turned on.
If it is not turned on, the flow branches to # G-5. # G-4: Interval time setting switch 57 is turned on
Is detected, and when it is turned on, the
When it is not turned on, the flow goes to # A-1 shown in FIG.
ー branches. # G-5: The aforementioned T 'is increased by one, and # G-
The flow moves to 6. # G-6: It is determined whether or not T 'is 10, and if T' is 10,
In the case where T 'is not 10 in # A-1 shown in FIG.
Branches to # G-1, and the above-mentioned # G-1, # G-3,
The loop of # G-5 and # G-6 is repeated, and T 'becomes 10.
Returns to # A-1. Therefore, in the subroutine described above,
Within 10 seconds after the time setting switch 57 is turned on.
When the switch is not turned on, # A-1 shown in FIG.
And the interval time setting is released. Also in this subroutine, the interval time
When Ti is set to “0”, a subroutine is executed as a playback operation.
For example, when connecting to a printer as described in
The external trigger mode for performing the operation is set. Next, refer to FIG. 12 when the REC switch is turned on.
The subroutine to be issued will be described. # N-1; REC switch 52 is on in FIG. 6 # A-2
Flow is detected in this step when it is detected that
Detects whether the PB mode flag has been cleared
If it has not been cleared, it is in playback mode.
The flow returns to # A-14 shown in FIG. 6 (RTS) and is cleared.
If so, the flow branches to # N-2. Therefore REC
If the mode is not set, turn on the REC switch 52.
No recording is done. # N2: N address of memory is "0000", that is, head 3
Whether the track accessed by -1 is unrecorded
And if it is not unrecorded, # A-14 shown in FIG.
The flow returns to step # N-3.
Row branches. # N-3: Determine whether the field flag is set
# N5 when set, when not set
The flow branches to # N-4. # N-4: The frame recording mode is set in this step.
Will be moved when the memory is
"0000", that is, the access of the head 3-2
Discriminates whether or not the track to be recorded is unrecorded.
If not, the flow returns to # A-14 shown in FIG. Also
In this 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; access to head 3-1 on magnetic sheet 1
The video signal for one field is in the head 3
Recorded by -1. # N-6: If the flow reaches this step, the frame
Since the recording mode is set, the two on the magnetic sheet 1
In each track, the video signal for one field is head 3
-1, 3-2. Then stepmoe
And drive heads 3-1 and 3-2 within one track.
Shift to the circumferential side. When executing # N-5 and # N-6, SW2 to SW5 are the second
It is driven as described in the figure. # N-7: The 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. Be in frame recording mode
In case of # N-6, the head 3-
Since frames 1 and 3-2 have been moved, the frame recording mode
However, the head 3-1 is the head recorded in # N-6.
Access the track next to the rack. Head 3
If the track recorded by -1, 3-2 is already recorded
In this case, REC and LED44B shown in Fig. 3 are used by blinking display
Warning to the user. Next, the flow branches from # D-15 to # D-19, and # D-19
-19 through # D-20 through # D-34.
You. That is, the track feed speed setting is single.
In this case, the flow branches from # D-21 to # D-34,
To the REC execution flag set in # N-7.
Therefore, the process returns to # N-9. When 2 screens / second and 5 screens / second are set, # D-
WAIT TIMER register for the time required to record at 28
Count down the WAIT TIMER register
When the WAIT TIMER register becomes 0, the flow is #
From # D-33 to # N-7 via # D-34 as described above.
# N-9 according to the set REC execution flag
Return to # N-9: Clear the REC execution flag. # N-10; such a step is the same as # D-20
And set the track feed speed from memory.
Embed. # N-11: Track feed speed set value is single
In some cases, go to # N-12.
The process returns to # A-14 shown in FIG. # N-12: Track feed speed is set to single
When the REC switch 52 is on.
Repeat the steps and execute the subroutine again
Control so that recording is not performed. If the track feed speed is set to other than single
Furthermore, when the REC switch 52 is on, # N-11
From # A-1 via # A-14 and # A-2 from # A-2
REC switch 5
Track feed speed set as long as 2 is on
The recording is performed continuously. REC switch 52 is turned off
Then, the flow is from # N-12 to # A-14, # A-1, # A-
Proceed to # 2 but call the subroutine at # A-2
And the continuous recording ends. Next, the program setting switch 58 is turned on using FIG.
The subroutine called when the
You. # H-1; program setting switch in FIG. 6 # A-8
This step is performed when it is detected that the switch 58 has been turned on.
To determine whether the PB mode flag is set.
Separately, when it is set, it is set to # H-2.
If not, the process returns to # A-1 shown in FIG. 6 (RTS).
This step is for program setting in the recording mode.
Provided to prohibit. That is, in this embodiment,
Select the playback mode before setting the program
The video recorded on the magnetic sheet 1 is
For example, program settings are made while checking on the monitor
It is configured to be. Automatically when the program setting switch 58 is turned on.
Resetting by setting the PB mode flag
The operation to the raw mode can be performed automatically. This place
Steps similar to the steps shown in # C-5 are # H-
It does not have to be provided instead of 1. # H-2; The program shown in FIG.
Execute program playback in gram track memory
Time, the track number to be reproduced next is stored.
The I register indicating the dress is set to 0. # H-3: Program indicating program playback mode
The ram reproduction mode flag is set, and the process returns to # A-1. Next, the program playback mode is set by a subroutine.
Program track setting switch 62 is turned on
15th subroutine called when
This will be described with reference to the drawings. # I-1; the program playback mode flag is set
And if it is set, go to # I-2.
If not, the flow branches to # A-1.
Therefore, the program is set by the program setting switch 58.
When playback mode is not set, program track
The program setting operation is not performed even if the switch 62 is turned on.
I can't. # I-2; The program of the aforementioned program track memory
S (#) indicating the start address at which the system is stored
In S1, when power is turned on, S = 0 and initial set
Is written to register M
No. # I-3: Program of the address stored in the register M
The data in the track memory is increased by one from the address.
Stored in the address. In other words, program tracks
Data indicating the track number stored in the
Data by one more than the address where the data is stored
Store at a larger address. # I-4; value obtained by adding 1 to the contents of register M to register I
Write. # 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 not, flow to # I-7; if not 0, flow to # I-3
Branches. The flow of # I-3 to # I-6 is repeated, and the register M
When the contents of the file become 0, the program track memory
The data stored at each address is larger by one.
To the new address. Therefore, follow this flow
Executed repeatedly and the flow branched from # I-6 to # I-7
In this case, data is stored in address 1 of the program track memory.
Data is not stored. # I-7: Track name accessed by head 3-1
Member is located at address 1 of the program track memory.
Will be delivered. Therefore, the program track setting switch
By turning on 62, the head 3-1 is accessed and re-
The track number where the video being generated is recorded
Will be programmed. # I-8; 1 is added to the contents of the register S. This step
Is executed, the register S always has # I-3 to # I-3.
The program track moved by executing the flow of # I-6
Address where the memory data is stored (most
Large address). # I-9; The program track setting switch 62 is turned on.
If this is the case, repeat this step
Returns to # A-1. If the user continues to set the program further,
Rack UP switch 54 or Track DOWN switch 55
Is turned on, the heads 3-1 and 3-2 are actuated.
Change the track being accessed and play the desired track
While checking the playback video,
The program setting can be performed by turning ON the switch 62.
Can be determined. Each time the program track setting switch 62 is turned on.
Fig. 14 shows the program track memory addresses.
The data stored in the address
It will be stored. Also, during program setting,
The register S and register I have exactly the same contents. Next, program setting switch 58, program track
The profile set by turning on the setting switch 62
Program playback to play back the program
Tracks that have been recorded in order from the track being accessed
Interval playback to play at sequentially set intervals
About the program executed when performing the raw
This will be described with reference to FIG. First, it is called when the start switch 60 is turned on.
The subroutine 20 will be described with reference to FIG. # K-1; In FIG. 6 # A-11, the start switch 60
When it is detected that the power has been turned on, the flow proceeds to this step.
Has arrived, and whether the PB mode flag is set or not
When the detected PB 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 playback mode is not set,
Playback and program playback cannot be performed.
If you accidentally turn on the start switch 60 during loading,
Interval playback or program playback may start
And can be prevented. Also, instead of # K-1, #
If steps similar to those shown in C-5 are provided,
Start switch 60 without setting the playback mode.
Interval playback program playback immediately
You can get started. # K-2: The program playback mode flag is set
It is determined whether or not it is set.
If not, the flow branches to # K-4.
Here, the program playback mode flag is set.
No, that is, when the interval playback is performed
explain about. # K-4: N address of memory is "0000", that is, head 3-
1 to determine whether the track being accessed is unrecorded
It is determined that # K-6 if not recorded and #K if not 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 embodiment described below, interval reproduction
Has track 49 accessed by head 3-1
Or head other than the 50th track
The track accessed by 3-1 is the 49th or 50th track
In the case of a track, tracks that have been recorded sequentially from the first track
Are played back, but # K-2 and # K-4
Head 3-1 to access the first track
If a step for driving the step motor 24 is inserted into the
Only the tracks that have been recorded sequentially from the first track are played back.
It is. Therefore, head 3-1 accesses the first track.
The first track when accessing another track
Search automatically by performing interval playback automatically from the beginning
The effect is extremely high to perform. # K-6: Automatic tracing indicating that interval playback is in progress
Set the feed flag. # K-7: Check if the field flag is set
It is determined, and if it is set, it is set to # K-8.
If not, the flow branches to # K-9. # K-8: The track accessed by head 3-1 is the most
Detects whether N is 50 or not, whether it is an inner track or not
And when it is detected that it is 50
To # K-10, when it is not detected that it is 50
The flow branches to # K-11. # K-9: The track accessed by head 3-1 is the most
N is 49 if the track is one track outside the inner circumference.
It is determined by detecting whether or not there is
Was not detected to be # K-10 to 49
In this case, the flow branches to # K-11. # K-10: In this step, the subroutine is executed.
The interval time Ti set by the execution is "0"
Is determined. At the time of interval as described later
The case where the interval Ti is “0” is determined in advance according to the external trigger signal.
Shift the head 3-1 with the set program
Mode and the interval
When the interval Ti is set to “0”, the flow is # A-1
On the other hand, when it is not set to “0”, the flow goes to # K-12.
Branch. # K-11: Subroutine is called, # D-1 to #D
The flow indicated by −18 is executed. In the subroutine
PB mode flag when subroutine is called
Is set, the flow is from # D-2 to # D-9.
And the head 3-1 accesses at # K-4.
The track on the inner circumference of one track is the frame image
Is it the inner track of two tracks for recording signals?
Head 3-1 does not access track 49
When it is determined, heads 3-1 and 3-2 are # D-12 and # D-12.
D-13 is shifted to the inner circumference by two tracks and discriminated.
When there is no head, only the head for one track is determined by # D-13.
1, 3-2 are shifted inward. Head 3-
Frame video on tracks 1 and 3-2 being accessed
If the signal is recorded, the field flag is cleared.
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,
Next to the track accessed by head 3-1 at # K-14
The outer track that touches and the outer track for another track
The frame video signal is recorded on two tracks of the track.
Heads 3-1 and 3-2 are # E-12 and # E-
13 shifts to the outer circumference by two tracks.
In this case, only one track is shifted to the outer circumference by # E-13.
Is done. Also, access 3-1 and 3-2 like # K-11
If a frame video signal is recorded on the track
The yield flag is cleared and the flow is from # D-19 to #
Move to K-13. # K-13: The track accessed by head 3-1 is
The content of register N is 1 if the track is the outermost track.
It is determined by detecting whether or not there is
Is detected, it is detected that it is 1 to # K-14.
If not, the flow branches to # K-12. did
Then, flow to # K-12 at # K-8 or # K-9.
When the head branches, that is, when the head 3-1 is at the 49th track or
Is # K-12, # when accessing the 50th track
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. Execute the flow from # K-4 to # K-14 as described above
However, when the flow branches from # K-4 to # K-5,
The head 3-1 accesses the track on which the video signal is recorded.
The video signal is not recorded.
Tsuk is skipped without being played back substantially. Further, by executing the flow of # K-4 to # K-14,
When the flow branches from # K-4 to # K-5,
3-1 and 3-2 are accessed by two tracks
If a frame video signal is recorded,
Since the field flag has been cleared,
The system playback mode is set automatically. Head 3-
Field projection on tracks accessed by 1,3-2
When the image signal is recorded, the field playback mode
Set automatically. Therefore, during interval playback
Is the most appropriate playback mode according to the video signal recording method.
Set automatically. # K-5: Set in subroutine from memory
The set interval time Ti is taken into the CPU 40. # K-15; Interval time Ti is "0" as in # K-10
And if it is “0”, go to # K-17, and
If not, the flow branches to # K-16. Outside here
# K-16 assuming that the section trigger mode is not set
The following is described. # K-16: Start the time measurement of timer 1, and go to # K-18.
move on. # K-18: Detect whether timer 1 has counted 1 second
When the time is being counted, go to # K-19.
The flow branches to # K-20. # K-20: Check if the stop switch 61 is turned on.
When it is turned on, it is turned on to # A-1, and it is not turned on.
In this case, the flow branches to # K-21. Here is the flow
When branching to # A-1, # A-1 to # A-12
Since the step is executed, the stop switch 61 is
When turned on in this state, the flow starts from # A-12
Would call Chin. The following subroutines
This will be described with reference to FIG. # M1; Program playback mode flag is set
If it is not detected and set, go to # A-14,
If set, the flow branches to # M-2. # M-2: The program reproduction execution flag is set
If it is detected and set, go to # M-3 and set.
If not, the flow branches to # M-4. # M-3; Make the contents of register I the same as the contents of register S
I do. # M-4; Set the register S to 0, then execute # M-3
You. The program playback mode is
This will be described in more detail at the time of execution. Hereinafter, the details of # K-21 and thereafter will be described in detail.
You. # K-21: Detect whether the track UP switch 54 is on
If it is detected that the switch is on, the subroutine
And heads 3-1 and 3-2 are shifted inward.
If it is not detected that the switch is on, the flow goes to # K-22.
Row branches. # K-22: Check if the track DOWN switch 55 is on.
Subroutine when it is detected that
And heads 3-1 and 3-2 shift to the outer circumference
When it is not detected that the switch is on, the program proceeds to step # K-16.
The flow branches. # K-19; 1 is subtracted from Ti. # K-23; If Ti is "0", # K-24; Ti is "0".
In such a case, the flow branches to # K-16. Therefore, the above steps # K-15 to # K-23 are executed.
Track UP switch during interval playback
54, by turning on the track DOWN switch 55
Recorded on tracks adjacent to the live track.
Video can be played. Also in that case
Keep switch 54 or switch 55 on
Track sending set in subroutine by
Tracks being played according to the speed
Next update, several screens during interval playback
You can easily play back the previous video. In addition, the track UP switch 54 and the track DOWN switch 55
On the track that is playing by turning on
When playing back the video recorded on the track
In this embodiment, before turning on the switches 54 and 55,
Of the interval time Ti of the track being played
When the time is reproduced, the flow is from # K-23 to #K
−24, the track is updated to play a new track.
As shown by the dotted line in the figure, the flow is jumped to # K-5.
Resets the interval time Ti and switches
Watch the video updated by the switches 54 and 55 for a certain period of time.
It can be configured so that it can be understood. # K-24; a track to be played when the interval time Ti ends
Program update mode is set when updating
Is detected or not, and when it is set #
Flow to K-3, if not set, flow to # K-6
Branches. Next, at # K-2, the program reproduction mode flag is set.
Subroutines called when set
This will be described with reference to FIG. # O-1; It is detected whether or not the content of the register S is "0".
If "0" is detected, the # K-5 must not be "0".
When it is detected, the flow branches to # O-2. The aforementioned
The register S has a program track memory
The first address set in the program is stored.
That the contents of register S is “0”
If no programs are stored in the rack memory
Since it indicates a match, when it is "0", the flow branches to # K-5. # O-2: It is detected whether or not the content of the register I is "0".
If "0" is detected, go to # O-3, not "0"
Is detected, the flow branches to # O-5. As described above, the register I contains
The track in which the track number to be played back is stored
Stores the address of the memory and plays the program
Is executed, as shown in # O-14, which will be described later.
Every time the step program playback is executed, 1 is subtracted.
You. Accordingly, the flow branches to # O-2, and
Register I is detected as “0” when the program is set.
The register S is not "0" and the program
This indicates that the steps have been executed. Exchange
In other words, when program playback is executed all the way, #O
-3, while program playback is being executed
Then, the flow branches to # O-5. # O-3: Interval time set in subroutine
Captures Ti and checks whether the interval time Ti is "0"
If the output is "0", the flow is from the subroutine, and from #A
Returning to -1, the program reproduction operation is terminated. Therefore, by setting the interval time to “0”,
In the external trigger mode set by
When the raw program is executed, the program playback operation is stopped.
You. Also, if the interval time Ti is set to a value other than “0”,
Flow to # O-4 during normal program playback when
Move on. # O-4: Write the contents of the register S to the register I. The program operation is started again. # O-5: Program track set in register I
(I) of the program memory address (program
Write to the address set in register I of
Data is shown in parentheses)
put out. # O-6: Track currently accessed by head 3-1
Data (I) is subtracted from N indicating the number, and from "0"
If it is not too small, go to # O-9.If it is too small, go to # O-7.
Row branches. # O-7: Set the field flag. Such a set
Prohibits head feed in frame mode as in # D-8
To do that. # O-8: One track of heads 3-1 and 3-2 in the outer circumferential direction
Shift by minutes. # O-9; tracknan accessed by head 3-1
Detecting whether data (I) is equal from N indicating a bar, etc.
If not, it is not equal to # O-11, that is, the track number
If the data (I) is larger than N indicating
The flow branches to O-10. # O-10; heads 3-1 and 3-2 are one track in the inner circumferential direction.
Shifts by ク. Head # 3 is obtained by repeating # O-6 to # O-10.
-1 is programmed in the program track memory
Is controlled to access the current track. # O-14; 1 is subtracted from the register I. In this step
At # K-24, the program playback mode flag is set.
The flow by determining whether the
Rukoto can. # O-15: The flag for executing program reproduction is set.
You. Therefore, a subroutine is called at # K-2.
First, whether the playback program is actually set
Is determined, and whether the printer mode is set
When the external trigger mode is set
Runs the program only once, otherwise
Program playback is repeated. Next, the flow when the external trigger mode is set
Will be described. External trigger mode is set
In this case, the flow branches from # K-15 to # K-17. # K-17 '; Printer connected as external device
Detects if busy (printing operation is in progress)
If it is busy, if it is not busy to # A-1,
The flow branches to # K-18. # K-18 ': Print star on printer as external device
Sends a signal. Note that such a print start signal is
Set the signal level of the terminal connected to the
It is performed by doing # K-19 '; Wait 150 msec. # K-20'; If the printer is busy, go to # K-21 and
If not, the flow branches to # K-24. # K-21 ': It is determined whether the stop switch 61 has been turned on.
If it is detected and not turned on, it is turned on to # K-20.
Then, the flow returns to # A-1. In executing the above-described steps # K-17 'to # K-21',
If the printer connected as an external device is busy
In this case, the flow returns to # A-1, and another
Repeat the flow shown in Fig. 6 until the switch is turned on.
You. When the flow shown in FIG. 6 is repeated,
If the start switch 60 is turned on, repeat the above flow.
Then, # K-17 'is executed again. Also, when a printer is not connected as an external device,
Is the printer of printer B 'shown in FIG. 1 at # K-17'.
The terminal to which the signal from the G signal output terminal is input is open
Becomes H level. Therefore, external trigger mode
Devices such as printers are connected even though
If not connected, access to heads 3-1 and 3-2
The track being played continues to be played, and the
Rack is not updated. A printer is connected as an external device, and
If the printer is not busy, # K-17 'to # K18'
Print start signal when the flow advances to
Waited for 150msec indicated by # K-19 after sending to printer
Printer operation is started later and the printer is busy
Is displayed, the printer operation ends or
Keep # K-20 and # K-21 until the switch 60 is turned on.
When the return printer operation is completed, the flow is # K-
From 20 ', branch to # K-24, and program playback mode flag
By detecting if the program is set
It is determined whether ram playback is set. Blog here
When the ram playback is set, the flow is the above-described #K.
Branches to -3, when program playback is not set
Branches to # K-6. Stop switch 60
If it has been executed, it is as described in the above flow. When program playback is set,
When the trigger mode is set, the description will be given in # O-3.
When the program playback is executed as described,
The ram playback operation is stopped. According to the present embodiment, the external trigger mode is selected.
And program playback is not set.
Head # 3 because of the provision of # K-10
Last track from the track accessed by 1,3-2
When the reproduction is performed one by one until the reproduction is completed, the reproduction operation is stopped. Therefore, in the external trigger mode, the program restarts.
Whether or not raw is set,
Even if the playback operation stops after all
When a printer is used as an external trigger device
Only one type of printing is performed. Conversely, program playback in modes other than external trigger mode
Is set or not,
After the playback in the predetermined order has been performed
The reproduction operation is performed again from the beginning. Therefore take re
When using the raw device in other than the external trigger mode,
It is said that playback in a predetermined order is repeated
Loose endless playback can be performed. The external trigger device in this embodiment is a printer.
However, for example, a device having a transmission function may be used.
Any other device that processes the reproduced signal
It may be. In the embodiment described above, the torsion shown in FIG.
Subroutine for performing track UP and track DOWN
When executing D and E at the time of reproduction, it is reserved in # D-8.
Set the field flag and set the field mode
And then head 3 at # D-15 to # D-17.
Fields are projected on tracks accessed by -1,3-2
Whether an image signal or a frame video signal is recorded
And if a frame video signal is recorded,
Clear the field flag (# D-18)
Mode, but interval playback during program playback
Track UP switch 54, track
Subroutine D when the switch 55 is turned on,
If E is called, execute # D-15 to # D-17.
It is also possible to play only in the field mode without
No. For this purpose, # D-19 is placed between # D-14 and # D-15.
The same steps as above are set and the automatic track feed flag is set.
If # D-15 to # D-17 are executed,
The flow branches to # D-15, and the automatic track feed flag
# D-15 to # D-17 when the tag is not set
The flow to # D-20 so as not to execute
do it. By configuring the flow in this way, the program
At the time of interval playback, the head 3-
1,3-2 is recorded in the track being accessed
Whether the video signal is a field video signal or a frame video signal
Signal, and play the field according to the result
Mode and frame playback mode automatically.
For playback other than the above, use the field / frame setting switch.
Field playback mode and frame playback mode
Can be switched arbitrarily, and the track UP switch
Switch 54 and track DOWN switch 55 are turned on.
Field playback will be dynamically selected. In addition, field / frame setting switch 59
To switch between the flash playback mode and the frame playback mode
In some cases, the tracks accessed by heads 3-1 and 3-2
Video signals that are not interlaced with each other
The frame playback mode setting is prohibited.
You. In this embodiment, the playback mode is set in advance.
When the track UP switch 54 is turned on, # D-8 ~
By executing the flow shown in # D-13, the magnetic
The frame video signal is recorded in each track on
Heads 3-1 and 3-2 are shifted by two tracks.
And the field playback mode is set. Also
This also applies when the track DOWN switch 55 is turned on.
It is. Therefore, for example, five screens per second on such a magnetic sheet
If the frame video signal of
Two field video signals that make up a frame video signal
Of these, for example, video signals of only odd fields
Will be played back. In this embodiment, information is written in a plurality of blocks.
Disk-shaped storage media with multiple tracks
Used a storage medium that is a magnetic sheet of
It may be an optical disk as a medium, or
Storage medium or a solid memory such as a semiconductor memory.
Molly may be. As means for reproducing information from a storage medium,
In the embodiment, each track on the magnetic sheet is accessed.
Processing the heads 3-1 and 3-2 and the signals of the heads
Reproduction amplifier 6, demodulation circuit 9, 1 / 2H delay line 10, switch SW4
However, appropriate means depending on the type of storage means, for example, storage
When using an optical storage medium as the medium,
When using a solid-state memory as the head, the memory
Means for accessing each of the blocks. <Effect of the Invention> According to the present invention, a finger is instructed by the instructing means for instructing continuous change.
The indicated changes and the information recorded in the recording means
The image information that can be read out in the first playback mode,
Determines whether the image information can be read out in playback mode 2
Switching of the switching means based on the determination result of the determining means
When controlling the state, follow the instruction from the instruction means.
When changing the image information to be reproduced by the
Regardless, the switching means is switched to the first reproduction mode.
Change the playback image continuously at predetermined time intervals.
When performing high-speed playback, monitor
It takes time for the update of the indicated image to complete.
To reduce the speed of high-speed playback.
Can be stopped.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention, FIG. 2 is a diagram showing a combination of switching states of SW2 to SW5 shown in FIG. 1, and FIG. FIG. 4 is a front view of a remote control device used together with the device of this embodiment, and FIGS. 5 to 18 are flowcharts of the CPU 40 shown in FIG. 1. Magnetic sheet 3-1 and 3-2 Head 40 CPU

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Masahiro Takei               770 Shimonoge, Takatsu-ku, Kawasaki-shi Canon               Tamagawa Works Co., Ltd.                (56) References JP-A-59-182683 (JP, A)                 JP-A-59-61380 (JP, A)                 JP-A-60-105384 (JP, A)                 JP-A-60-109389 (JP, A)                 JP-A-60-93888 (JP, A)                 JP-A-53-27315 (JP, A)

Claims (1)

(57) [Claims] A first reproduction mode for reading out a predetermined amount of image information from the recording means as image information for one screen, and a second reproduction mode for reading out image information larger than the information amount for one screen in the first reproduction mode as high-quality image information. Switching means for switching between the second reproduction mode and the second reproduction mode; determining whether the information recorded in the recording means is image information that can be read in the first reproduction mode or image information that can be read in the second reproduction mode. Determining means for instructing continuous change of image information to be reproduced from the recording means at predetermined time intervals; switching of the switching means based on the change instructed by the instruction means and the determination result of the determining means Control means for controlling a state, wherein the control means relates to the determination means when changing image information to be reproduced in accordance with an instruction from the instruction means. A switching unit that switches the switching unit to the first playback mode and controls the playback image to be continuously changed at predetermined time intervals.