JPH01128265A - Still picture recording device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a recording error by simultaneously informing an operator that recording is started and there is no unrecorded track by means of sound when it is decided to be a final track if recording is executed in the final track of a recording medium or when the recording instruction of the final track in an unrecorded state is outputted. CONSTITUTION:The whole action of a still picture recording and reproducing device is governed by a controller 50, and a magnetic disk 21 in a disk back is installed on the spindle of a disk motor 54. The motor 54 is phase-controlled in a servo control circuit 56, and a magnetic head 51 is shifted by a head shifting device 57. The FM video signal of the track in the head 51 is enveloped and detected, A/D converted 72 and inputted to the controller 50. When it is decided to be the final track if recording is executed in the final track of the disk 21 or the recording instruction is outputted to the final track in the unrecorded state, the operator is securely informed that the recording is started and that there is no unrecorded track by a buzzer 80 and the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a still image recording device that records video signals on a magnetic recording medium such as a magnetic disk, and particularly relates to a still image recording device that records video signals on a magnetic recording medium such as a magnetic disk, and particularly relates to a still image recording device that records video signals on a magnetic recording medium such as a magnetic disk. The present invention relates to a still image recording device suitable for recording diagnostic details.

[Conventional technology]

Still image recording devices include so-called electronic still cameras and video magnetic recording systems. These record video signals on magnetic recording media such as magnetic disks.
When these reproduction outputs are applied to a television receiver, a still image is projected on the cathode ray tube of the receiver. An electronic still camera is a combination of an imaging device such as a solid-state image sensor and a recording device (JW) using a magnetic disk, which electronically photographs a subject and records the still image on a magnetic disk. A video magnetic recording system electronically captures a still image appearing on a visible recording medium such as ordinary film or photographic paper and records it on a magnetic disk.

A system has been proposed that combines such a still image recording device and an ultrasonic diagnostic device and records the diagnosis contents as a still image. By the way, the magnetic recording medium such as a magnetic disk used in the above-mentioned still image recording device has, for example, 50 recordable tracks. A unit video signal to be recorded is extracted by one operation, the unit video signal is recorded on one track of the magnetic recording medium, and after the recording is completed, the recorded signal is reproduced for a certain period of time, and then the magnetic head is moved to the next one. It is now possible to execute an I cycle in which the track is accessed and placed in a recording standby state. At this time, when recording one track, a warning sound is emitted for 1/60 seconds, for example, to notify that recording is in progress.

Further, in the still image recording device, after the recording/reproducing operation of the final track (50th track) is completed, the magnetic head is returned to the home position, and the magnetic head is transferred from the home position to the first track to reproduce the recorded contents of the first track. ,
When the first track is in a recording state, the above-mentioned one-cycle operation is not executed in response to subsequent recording instructions.

[Problem that the invention seeks to solve]

In the conventional still image recording device described above, in order to access any in-track from the first track to the last track with the magnetic head, the forward key (or record key) must be pressed once in succession starting from the home position. This is done by manipulating.

Therefore, for example, if the magnetic head is located on the 48th track and you press the record key 5 times to record 5 frames of still images obtained from the diagnostic device, 3 frames of still images will be recorded, but the other 2 frames will be recorded. No image is recorded, the magnetic head returns to the home position, and the first track is simply reproduced repeatedly. Therefore, a recording error will occur regarding the two frames of images.

Such recording errors cannot be reliably prevented even if the display section is configured to display the track number where the magnetic head is currently located.

This is because the operator is paying attention to observing the monitor image of the diagnostic device.

The present invention was made in view of these circumstances, and
It is an object of the present invention to provide a still image recording device that can reliably detect that there are no unrecorded tracks on a magnetic recording medium such as a magnetic disk during a recording operation.

Means for Solving Problem C] In order to achieve the above object, the present invention rotates a magnetic recording medium such as a magnetic disk, and while moving a magnetic head in the radial direction of the magnetic recording medium, a magnetic head is moved to each track. In a still image recording device for recording video signals, a head transport means for transporting a magnetic head in the radial direction of a magnetic recording medium, an operation means for instructing a recording operation, and a video signal recording means for recording video signals on the magnetic recording medium. and track position detection means for detecting the current track position of the magnetic head on the magnetic recording medium, recording state detection means for detecting the presence or absence of recording in each track of the magnetic recording medium, and warning means for issuing an audible warning. , when the output signals of the operating means, the track position detecting means and the recording state detecting means are taken in and the video signal is recorded on the magnetic recording medium, the magnetic head is moved from the first track to the last track based on the output signal of the operating means. The head transporting means and the video signal recording means are driven and controlled so that the magnetic head is transported with a predetermined feed width toward the magnetic head and recorded, and when the magnetic head is transported to the final track, a recording instruction is issued by the operating means. In some cases, the apparatus is characterized by comprising a control means for driving and controlling the warning means so as to emit a warning sound at the time when recording on the final track is started.

[Effect]

In the still image recording device according to the present invention, when the magnetic head is moved to the final track (50th track) during a recording operation, if a recording instruction is issued by operating a recording key as an operating means, the magnetic head is moved to the final track. A warning sound is emitted by the warning means when recording is started.

Also, when a track search is instructed, the magnetic head is sequentially moved from the first track to the last track, and the presence or absence of recording on each track is determined, and if the last track is in the recording state, a warning sound is emitted. It will be done.

In this way, in the present invention, a warning sound is output to notify that the track is the last track only when a recording instruction is issued by operating the record key on the last track, or when the track search is performed, especially when the last track is in the recording state. Therefore, it is possible to reliably detect that there are no more unrecorded tracks on a magnetic recording medium such as a magnetic disk.

〔Example〕

Hereinafter, the implementation side of the present invention will be explained with reference to the drawings.

FIG. 1 shows the appearance of a still image recording and reproducing apparatus to which the present invention is applied, particularly its front operation panel.

On the left side of the front operation panel 11 of the still image recording and reproducing apparatus 10, a packet 13 for storing a disk pack 20 and its cup 12 are rotatably supported at their lower ends. Eject button (so-called eject button)
By pressing button) 16, the closed cup <-1
2 and 7 are mechanically opened as shown in chain lines. When the cover 12 is pressed, the cap 12 and the throat 13 are closed and locked. Further to the left side of the cover 12, a power button 14 and its indicator light 15 are provided.

The disk pack 20 includes a thin, small-diameter magnetic disk 21.
It consists of a case that rotatably accommodates the . A circular opening 22 is formed approximately in the center of the case, and the hub or core at the center of the magnetic disk 21 can be exposed through this opening. The disk pack 20 is further provided with a shutter 23 movable in a direction parallel to one side thereof. this shack 2
3 is opened when the disk pack 20 is inserted into the bucket 13, and a regulating plate 53 and a magnetic head 51 (see FIG. 3), which will be described later, can come into contact with the magnetic disk 21 inside. A claw 24 for preventing erroneous recording is provided on one side of the case of the disk pack 20.

A plurality of (for example, 50) tracks (for example, a track pitch of 100 μm) are provided in a circular shape on the magnetic disk 21, and each track carries an FM signal for one image (one frame).
Modulated color video signals (including brightness signals, chroma signals, etc.) can be magnetically recorded.

FIG. 2 shows the relationship between the tracks provided on the magnetic disk 21 and the home position HP of the magnetic head. The 50 tracks arranged concentrically on the magnetic recording surface of the magnetic disk are numbered in order from the outermost one.
Track numbers from 1 to 50 are assigned. Home position HP No. 1 is outside the 1st track. This home position HP is not attached to the magnetic disk 21, but is an extreme position assigned on the movement path of the magnetic head. The home position HP is detected by a home position switch 84 (see FIG. 3).

Referring again to FIG. 1, the right half of the front operation panel 11 is provided with a display 17 and various key switches and indicator lights. The display 17 is, for example, a liquid crystal display, and shows the magnetic disk 2 where the magnetic head 51 is currently located.
Track number 1, various warnings, for example, when it is detected that the erroneous recording prevention claw of the disk pack 20 has been removed, and furthermore, when it is detected that the last track is detected, the pack mark is displayed blinking. Warning (17a)
) is performed. A display such as "Pack present" (indicated by 17b) is displayed to indicate that the disk pack 20 is placed in the bucket 13 and the packet 13 is closed.

The key switch has keys 3 for instructing various operations.
1.32.33.34.35 and 36, keys 41.42.43 and 44 for setting various modes, key 1 for setting automatic advance time in playback mode
There is an 8th grade. Indicator light 45.46.47 is key 41.42
and 43, and when these keys are pressed, the corresponding indicator lights are lit. The functions of these key switches will be described later.

A still image recording and reproducing device is capable of reproducing and recording still images. When a video signal is recorded on the above-mentioned magnetic disk 21, it is possible to reproduce the video signal from the recorded track. Reproducing means reading an FM modulated signal from a predetermined track of a magnetic disk using a magnetic head, demodulating it, and outputting a standard color television video signal in NTSC format or the like.

If the output terminal of this video signal is connected to a television receiver, the reproduced still image will be displayed on the cathode ray tube. Recording assumes input of standard color television video signals. This video signal is provided by, for example, a television camera or a television receiver. Recording involves FM modulating one frame of a given video signal and writing it onto a predetermined track on a magnetic disk using a magnetic head.

When displaying a screen on a television, interlaced scanning is generally performed, so a video signal is created so that one frame consists of two fields. However, in still image recording devices such as the above-mentioned electronic still cameras, in order to save the recording surface of the magnetic disk for recording video signals, and for other purposes, one field is recorded on the magnetic disk so that one frame (one image) is recorded. Video signals are often recorded. This is called a field record. Furthermore, the method of obtaining one frame of image using the two fields described above is called frame recording.

There are three recording modes: single-frame recording, recording review, and snapshot. In the recording mode, the magnetic head must be kept on standby in an unrecorded track of the magnetic disk. When one-frame recording is selected, a video signal for one frame (one field) is recorded on that track, and immediately thereafter the magnetic head moves to the next (ie, inner) track and waits. In the recording review mode, after one frame of video signal is recorded on a track, the video signal recorded on that track is immediately played back and output for a certain period of time (for example, 2 seconds), after which the magnetic head moves to the next track. and wait.

In the snapshot mode, the above-described one-frame recording operation is performed continuously (for example, about 6 to 8 times per second).

In each of the single-frame recording, recording review, and quick-shoot recording modes, if a video signal has already been recorded on the track where the video signal is to be recorded, the video signal cannot be recorded unless the video signal is erased.

The above-mentioned recording operations and other operations will be explained with reference to FIG. 3 in relation to the various keys shown in FIG. 1.

In stop mode, when the single-frame key 43, review key 42, or snapshot key 41 is pressed, the corresponding indicator light 47, 46 or 45 lights up, the pressed key is memorized, and the device enters recording standby mode. mode. Next, when the record key 33 is pressed, the 1-frame key 43 is pressed.
If there is a memory of pressing the review key 42, a one-frame recording operation is performed, and if there is a memory of pressing the review key 42, a recording review operation is performed. After these operations, the device returns to recording standby mode again. If the recording key 33 is pressed while there is memory of pressing the quick copy key 41, the quick copy operation is performed while the recording key 33 is pressed, and when the recording key 33 stops being pressed, the mode returns to recording standby mode. .

In order to prevent double edged images on one track, if any signal is already stored on the track where the magnetic head is located, the various recording operations described above are prohibited and the indicator lights 45 to 47 are turned off. The corresponding one will blink. Whether or not a signal is recorded on a track is determined by the envelope detection output, which will be described later.

In such a case, the forward key 31 or the reverse key 32 can be pressed to move the magnetic head to the adjacent inner or outer track. This is track feed mode. Each press of these keys 31 and 32 advances the magnetic head one track, and then returns to recording standby mode.

However, it is also possible to search for the next unrecorded track after recording the video signal in each recording operation.

To erase the signal of a recorded track, press the 1-frame key 43 and the erase key 44 from the stop mode. When the erasing process for that track is completed, it returns to recording standby mode.

When the stop key 34 is pressed from the recording standby mode, the magnetic head is moved outward (in the opposite direction) by one track and returns to the stop mode, except when erasing is performed. This is because in the three recording modes described above, the magnetic head is moved inward (forward direction) by one track after recording.

When the forward key 31 or the reverse key 32 is pressed from the stop mode, the mode shifts to a reproduction mode, and the video signal recorded on the track where the magnetic head is located is reproduced. If the forward key 32 or reverse key 31 is pressed again, the magnetic head is sent to one track inside or outside, and the signal of that track is reproduced. automatic feeder-35
When is pressed and the automatic feed time is set using the key group 18, the magnetic head is sequentially fed in the forward direction at each set time, and each track is played back. Also, when the track number display key 36 is pressed, the track N where the magnetic head is located is displayed.

Since the signal for displaying the track number is superimposed on the reproduced video signal and output, the track number is displayed in the upper right corner of the screen of, for example, a cathode ray tube. When the stop key 34 is pressed, the system returns to the stop mode.

In any of the above modes, the track number where the magnetic head is currently located is displayed on the display 17.

In the initial state when the power is turned on by the power switch 14, the magnetic head is once returned to the home position HP, and then moved inward by a predetermined distance and positioned on track No. 1.

In the recording mode, the magnetic head is moved in a so-called absolute track number system. In other words, the magnetic head is transported in the radial direction of the magnetic disk, but it is always at home.
With the position HP as a reference, the position of each track where the magnetic head is to be positioned is determined by the distance from the home position HP.

In playback mode, the position of the magnetic head is determined by the above-mentioned absolute track number formula, and then the center of the magnetic head is positioned at the center of the recorded signal based on envelope detection, which will be described later. Fine position control is performed.

Next, FIG. 4 shows the electrical configuration of an embodiment of the still image recording and reproducing apparatus according to the present invention.

The overall operation of this still image recording and reproducing device is controlled by a control device 5.
Controlled by 0. This control device 50 is composed of a central processing unit, preferably a microprocessor (hereinafter referred to as CPU), a memory that stores its programs and necessary data, and interfaces with peripheral elements, circuits, devices, etc. There is.

Once the disk pack 20 is placed within the packet 13 and the packet 13 is closed, the magnetic disks 21 within the disk pack 20 are mounted on the spindle of the disk motor 54. Since recording or reproduction is performed by the magnetic head 51 while the magnetic disk 21 is being rotated,
A regulating plate 53 is provided within the cover 12 to maintain good contact between the magnetic head 51 and the magnetic disk 21 at all times. This regulating plate 53 has a groove along the moving path of the magnetic head 51, and is in contact with or close to the magnetic disk 21 at a portion other than this groove, and is
The magnetic disk 21 is sandwiched between the magnetic disk 1 and the magnetic disk 1. As described above, the magnetic head 51 is disposed so as to be movable in the radial direction of the magnetic disk 21 and is in contact with the magnetic recording surface of the magnetic disk 21. In addition, a magnetic material is provided at one location of the core of the magnetic disk 21 to leak a part of the magnetic flux of the permanent magnet for cha-soking provided in the core, and this leakage magnetic flux is detected and the magnetic disk 21- A phase detector 52 that generates one phase detection pulse PG for each rotation of
is close to the core.

The phase detection pulse PC of the phase detector 52 is input manually to the servo control circuit 56 and the control device 50. A frequency generator 55 provided in the disk motor 54 outputs a signal with a frequency proportional to the number of rotations of the motor 54, and is applied to a servo control circuit 56. Furthermore, this servo control circuit 56 is manually supplied with a vertical synchronization reference signal refV. Based on such input signals, the servo control circuit 56 controls the disk motor 54 at a constant rotation speed, for example, 3.60'Or.
.

The rotational phase of the motor 54 is controlled so that the phase pulse PG advances by 7H from the rise of the reference signal refV as shown in FIG.
is the period between two consecutive horizontal synchronization signals). Further, the servo control circuit 56 starts and stops the motor 54 in response to commands from the control device 50.

The phase control of the motor 54 by the servo control circuit 56 has the following meaning. Consider a case where an FM-modulated video signal is recorded on a predetermined track of the magnetic disk 21 by the magnetic head 51.

A standard format color video signal applied to the input terminal 60 from a television camera, television receiver, etc. is processed by the recording processing circuit 61 to convert its luminance signal component and chroma signal component into F.
The M-modulated signals are combined and sent to the amplifier circuit 63.
given to. This amplified FM modulation signal is applied to the magnetic head 51 via a recording control switch 64 and a recording/reproduction changeover switch 65. On the other hand, horizontal and vertical synchronization signals of the input video signal are extracted by a synchronization separation circuit 61a and provided to a waveform shaping circuit 66. As shown in FIG. 5, the waveform shaping circuit 66 generates a reference signal ref, which has a leading edge synchronized with the leading edge of the vertical synchronization signal Vsync input manually and has a duty ratio of approximately 1/2.
V is created and output. This reference signal ref
V is connected to the servo control circuit 56 via the synchronization switch 68
(The relationship given to the synchronization is called external synchronization). Therefore, on the magnetic disk 21, recording of the vertical synchronization signal is started from a reference position that is shifted by a rotation angle corresponding to a period of 7H from the position of the above-mentioned magnetic body that generates the phase pulse PG. The video signal will be recorded.

In the case of reproduction, a similar vertical synchronizing signal ref V is sent from the oscillation circuit 67 to the servo control circuit 5 via the switch 68.
6 is called internal synchronization). This reference signal refV and phase pulse PC by the servo control circuit 56
By controlling the phase of the motor 54 using , the magnetic head 51 always reads out a video signal whose vertical synchronization signal starts 7H behind the PC.

The phase pulse PG is also given to the control device 50, and the video signal is controlled by this pulse PG in both recording and reproduction.
Since it is synchronized with a certain delay, the control device 50
This pulse PG is used for timing control in various processes.
This can be done based on the standard. This is the significance of phase control of the motor 54.

The modulated video signal read from the magnetic head 51 is input to the amplifier circuit 73 via the changeover switch 65, and further sent to the reproduction processing circuit 71 and envelope detection circuit 72.

The reproduction processing circuit 71 demodulates and synthesizes the input modulated luminance signal and chroma signal, and outputs the resultant signal to the output terminal 70 as a standard color video signal. When this video signal is applied to a television receiver, a still image for one frame is displayed on a cathode ray tube.

The mute ink circuit 74 connects the output terminal 70 of the playback processing circuit 71 to the television receiver connected to the terminal 70 by grounding the output terminal 70 of the playback processing circuit 71 when the control device 50 executes unrecorded track processing in the recording mode prior to the recording operation. Perform muting of the video signal. The operation timing is controlled by the control device 50.

The erase signal generation circuit 62 generates an erase signal,
For example, 4°5~20MH for a certain period of time (about 1 second),
generates a signal whose frequency is continuously swept over a range of degrees.

The magnetic head 51 is supported movably in the radial direction of the magnetic disk 21 by a head transfer device 57, and is controlled to be moved in the same direction. The control device 50 gives instructions to the device 57 regarding the direction and amount of movement of the magnetic head 51.

The device 57 includes a step motor, and the magnetic head 51 is moved in proportion to the rotation angle of the step motor.

For example, each drive pulse of a step motor causes the motor to rotate approximately 15 degrees, which causes the magnetic head 5 to rotate approximately 15 degrees.
1 is transferred by approximately 8.33 μm (1 pitch).

Therefore, the magnetic head 51 is moved very accurately.

The envelope detection circuit 72 is a detection circuit that detects the envelope of the read signal of the magnetic head 51, that is, the FM modulated video signal recorded on the track of the magnetic disk 21, and outputs a voltage signal corresponding to the envelope. be. The voltage signal representing the envelope is converted by an analog/digital converter (Δ/D converter) built into the circuit 72 into an 8-bit digital signal representing, for example, 256 quantization levels, and is input to the control device 50. be done.

The envelope detection signal is used to search for unrecorded tracks on the magnetic disk 21 in recording mode and to detect the center position of recorded tracks (in playback and erase modes). When the magnetic head 51 is moved across a track, if the DC level of the envelope detection signal does not reach a predetermined threshold level, the control device 50 determines that the track is unrecorded.

When reproducing a video signal, after the magnetic head 51 is positioned by the above-mentioned absolute address method, the magnetic head 5
1 is moved inward or outward one pitch at a time, the position where the detected signal shows a peak is searched, and the position where this peak is shown is determined to be the center of the track where the video signal is recorded, and the magnetic head 51 The video signal is reproduced with the image signal being positioned at this center. This peak search is performed in the same way when erasing a video signal, and areas within a certain range on both sides of the peak position are subject to erasure.

Recording control switch 64, recording/playback switch 65,
The synchronization changeover switch 68 and the video output control switch 69 are illustrated as contact switches, but of course -
For boat fishing, it is realized by a non-contact switch made of semiconductor elements. These switches are controlled to be turned on and off by the control device 50 as follows.

In the recording mode, the switch 64 is turned on at a certain timing, the switch 65 is connected to the recording processing circuit 61 side, the switch 68 is connected to the waveform shaping circuit 66 side, and the switch 69 is turned on. That is, when the recording standby mode (recording standby state) is entered, the selector switch 6
5 and 68 are recording/reproduction switching signals REC from the control device.
/PB and synchronous switching signal 5YCH, respectively, as described above. Further, the switch 69 is turned on by the video output control signal VIDCH.

Then, when recording, two consecutive
The switch 64 is turned on by the recording control signal REC only between two pulses PC. Therefore, the FM modulated video signal is sent to the magnetic head 51 during this time, and one field is recorded in one rotation of the magnetic disk 21.

At this time, since the switch 69 is on, the video signal input to the input terminal 60 is output to the output terminal 70 as is.

In the recording review mode, playback is performed after recording. Therefore, when recording by the magnetic head 51 is completed, P
In synchronization with the C signal, the switch 65 is switched to the reproduction processing circuit 71 side, and the switch 69 is turned off. Therefore, the video signal read by the magnetic head 51 is output from the output terminal 70 as a reproduction output. Then, after a certain period of time, these switches 65, 69 return to the above-mentioned state again.

Even during the above-described playback in the recording review mode, the changeover switch 68 remains connected to the waveform shaping circuit 66, and external synchronization is performed. That is, since a video signal is input to the input terminal 60, servo control is performed based on the synchronization signal.

In the playback mode, the selector switch 68 is connected to the oscillation circuit 67.
However, during playback in recording review mode, switching from external synchronization to internal synchronization is not performed, and external synchronization continues throughout. This is because when switching from external synchronization to internal synchronization, the rotational phase of the disk motor 54 is temporarily shifted, causing distortion in the video signal output from the output terminal 70, causing the image displayed on the cathode ray tube to be distorted. This is because disturbances occur.

Also in erase mode switches 64, 65, 68 and 6
The state of 9 is the same as in the recording mode.

In the reproduction mode, the switches 64 and 69 are kept off, the switch 65 is switched to the reproduction processing circuit 71 side, and the switch 68 is switched to the oscillation circuit 67 side.

The various switches include a load switch that detects that the packet 13 is closed to the position where the magnetic disk 21 therein is securely attached to the spindle of the disk motor 54.
The end switch 81, the pack switch 82 that detects that the disk pack 20 is housed in the closed packet 13, and the erroneous recording prevention claw 24 of the disk pack 20 housed in the packet 13 are removed. an erroneous recording prevention switch 83 that detects the absence of a record (that is, recording is prohibited); and the above-mentioned home position switch 84.
and so on. Various keys are provided on the front operation panel 1 mentioned above.
There are key groups 31, 32 and 18 provided in 1.

Furthermore, a recording mode key 49 is provided for setting the recording mode to either field recording or frame recording mode. When the recording mode key is not operated, the mode is set to field mode, when pressed, the mode is set to frame mode, and when pressed further, the mode is set to field mode.

When the frame mode is set, an indicator light 48 lights up. The control device M5G performs a key scan routine at regular intervals (for example, 1/60 seconds), and in this key scan routine, the control device 5
0 sends a key scan pulse to the above-mentioned switch group and key group, and detects and stores the on/off states of the switches and keys depending on whether this pulse is returned.

Further, 80 is a buzzer that generates a warning sound, and in this embodiment, when recording on each track, a short warning sound (for example, 0.25 seconds) is generated for each track to notify that recording is about to occur. At the same time, when recording the final track, it is determined that it is the final track at the start of recording, and when the final track is in the recording state in an unrecorded track search, it is determined that it is the final track.In other words, it is determined that the unrecorded track is the final track. The controller 50 is configured to generate a long warning sound (for example, 2 seconds) to notify the user of the absence of a warning sound.

Next, the contents of the unrecorded track search process executed by the control device 50 will be explained based on FIG. 6. In the same figure, when one of the recording mode keys 41 to 43 is pressed, the program is started and the first track in which the data is written is first read in order to identify the disk pack 20 installed in the main body of the device. The data is reproduced, and then the presence or absence of the erroneous recording prevention claw 24 is determined based on the output signal of the erroneous recording prevention switch 83 (steps 100 and 101).
.

Furthermore, in step 102, the muting circuit 74 is driven, and the terminal 70 from which the video signal is output is grounded to perform muting, and then, based on the setting output of the recording mode key 49, it is determined whether or not the frame mode is set. is determined, and if it is in frame mode, 2 consecutive
It is determined whether or not the track is in an unrecorded state based on the detection output of the envelope detection circuit 72 (step 1).
03.104). If it is determined in step 104 that two consecutive tracks are not in an unrecorded state, it is determined whether or not the track on which the magnetic head 51 is currently positioned is the final track (step 105). Step 10
5, if it is not the last track, the head transfer device 57 transfers the magnetic head to the next track (step 1).
06), then returns to step 102 and repeats the same process.

On the other hand, if it is determined in step 103 that the recording mode is not frame mode, that is, field mode, it is determined whether the track on which the magnetic head 51 is currently positioned is in an unrecorded state (step 107). )
, if the track is in a recording state, step 10
The process advances to step 5, and the same processing as described above is performed.

If it is determined in step 107 that the track is in an unrecorded state, the buzzer 80 will emit a short warning sound (for example, 0°25 seconds) to notify that the track is in a recording standby state, and one frame recording will begin. The recording mode is set to high state, and the execution of this processing routine is ended (steps 108 and 109).

On the other hand, if it is determined in step 105 that it is the last track, the pack mark is displayed blinking on the display 17 (for example, for 2 seconds), and the buzzer 80 makes a long warning sound (for example, 2 seconds) and then the last track is played to end the execution of this processing routine (steps 110.111.112).
).

Further, if it is determined in step 1 [) 1 that the disc pack 20 loaded in the bucket 13 of the apparatus main body does not have the erroneous recording prevention claw 24, the pack mark will be displayed blinking on the display 17, and a warning will be sounded by the buzzer 80. Sound (Step 11
1) is issued for 2 seconds to end the execution of this processing routine (steps 113 and 114).

In this processing routine, the distribution of tracks determined to be in an unrecorded state is written into the memory in the control device 50 as a map.

Next, the contents of the recording process executed by the control device 50 will be explained based on FIG. 7. In the figure, the recording key 33
When the button is pressed, the block is activated, and first, it is determined whether or not there is an erroneous recording prevention claw 24 on the disk pack 20 (step 120).

In step 120, the error recording prevention claw 2 is attached to the disk pack 20.
If it is determined that there is no 2
seconds) and ends the execution of this processing routine.

If it is determined in step 120 that the erroneous recording prevention claw 24 is present, it is determined whether the recording mode is the frame mode (step 121), and if the recording mode is the frame mode, two more consecutive tracks are recorded. It is determined whether or not it is in an unrecorded state (step 122). This determination is made by referring to a memory map indicating the distribution of unrecorded tracks written in the memory in the control device 50 when the unrecorded track search is performed.

If it is determined in step 122 that two consecutive tracks are unrecorded, a recording operation is performed (step 1
23), then the buzzer 80 emits a short warning sound (for example, 0°25 seconds) indicating that recording is in progress (step 124). Furthermore, in step 125, it is determined whether or not the track on which the magnetic head 51 is currently located is the final track. If it is not the final track, the magnetic head 51 is transported by one track by the head transport device 57, and this Finishing the execution of the processing routine (step 1
26).

On the other hand, if it is determined in step 125 that the truck is the final truck, the buzzer 80 emits a long warning sound (for example, 2 seconds) to notify that the truck is the final truck, and then the display 17 displays a pack mark. is displayed blinking (for example, for 2 seconds) and the execution of this processing routine is ended (steps 129 and 130).

Further, if it is determined in step 121 that the recording mode is field mode, it is determined whether the track on which the magnetic head 51 is currently located is in an unrecorded state (step 127), and if the track where the magnetic head 51 is currently located is in an unrecorded state. If so, the process advances to step 123 and the same processing as described above is performed.

If it is determined in step 127 that the track is in the recording state, it is determined whether or not the track is the final track (step 128). Step 1
If it is determined in step 28 that the track is not the last track, the display 17 flashes the pack mark (for 2 seconds), and the execution of this processing routine ends (step 130).

Further, if it is determined in step 128 that the track is the last track, the buzzer 80 emits a long warning sound (2 seconds) to notify that it is the last track.
Next, the pack mark is displayed blinking (for 2 seconds) on the display 17, and the execution of this processing routine is completed.

In this embodiment, during recording, a recording check warning sound is emitted for each track, and when recording the last track, a warning sound is emitted to notify that it is the last track at the start of recording, or when an unrecorded track search is performed, the last track is detected. It is configured to emit a warning sound to notify that the track is the last track only when it is in the recording state. Therefore,
According to this embodiment, it is possible to reliably detect that there are no more unrecorded tracks on the magnetic disk 21.

[Effect of Hathu]

As explained above, in the present invention, when the last track of a magnetic recording medium such as a magnetic disk has already been recorded, the recording instruction for the final track is determined to be the final track, or the recording instruction for the final track in an unrecorded state is issued. Since the present invention is configured to notify the operator by voice that there are no unrecorded tracks at the same time as recording starts when the recording is started, the present invention can reliably detect that there are no unrecorded tracks on the magnetic recording medium. This makes it possible to prevent recording errors from occurring.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a still image recording and reproducing apparatus to which the present invention is applied, FIG. 2 is an explanatory diagram showing track numbers and home positions on a magnetic disk, and FIG. 3 is an illustration of various operations. FIG. 4 is a block diagram showing the configuration of an embodiment of the still image recording and reproducing device according to the present invention, and FIG. FIG. 6 is a time chart showing the synchronous control of the disk motor and recording timing by the servo control circuit, FIG. 6 is a flow chart showing the contents of the unrecorded track search processing routine executed by the control device in FIG. 4, and FIG. 5 is a flowchart showing the contents of a recording processing routine executed by the control device in FIG. 4. FIG. 10...Still image recording and reproducing device, 17...Display device, 50...Control device, 51...Magnetic head, 5
7... Head transfer device, 72... Envelope detection circuit, 80... Buzzer.

Claims (4)

[Claims] (1) In a still image recording device that rotates a magnetic recording medium such as a magnetic disk and records video signals on each track while moving a magnetic head in the radial direction of the magnetic recording medium, the magnetic head is moved to the magnetic recording medium. A head transport means for moving the head in a radial direction, an operation means for instructing a recording operation, a video signal recording means for recording a video signal on a magnetic recording medium, and a track for detecting the current track position of the magnetic head on the magnetic recording medium. a position detecting means, a recording state detecting means for detecting the presence or absence of recording on each track of the magnetic recording medium, a warning means for issuing an audio warning, and output signals of the operating means, the track position detecting means, and the recording state detecting means. and a head transporting means configured to transport the magnetic head from the first track toward the final track at a predetermined feed width based on the output signal of the operating means and record the video signal on the magnetic recording medium. and drive control of the video signal recording means, and when a recording instruction is issued by the operating means when the magnetic head is transferred to the final track, a warning sound is emitted when recording starts on the final track. A still image recording apparatus comprising: a control means for driving and controlling the warning means. (2) When a recording instruction is issued by the operating means, the control means searches all tracks by sequentially moving the magnetic head from the first track to the last track before starting the recording operation. Claim 1 is characterized in that the head transport means and the warning means are drive-controlled so as to emit a warning sound when in a recording state.
) still image recording device. (3) The control means drives and controls the warning means to emit a warning sound at the time of starting recording on each track other than the last track on the magnetic recording medium, or The still image recording device according to any one of paragraph (2). (4) The warning sound emitted by the warning means is different depending on whether it is recorded on the last track of the magnetic recording medium or on each track other than the last track. Items (1) to (
The still image recording device according to any of item 3).