JP3028532B2 - Erasing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erasing device for erasing a recording on a recording medium such as a magnetic disk in a recording method for recording image data together with identification data thereof on a recording medium.

2. Description of the Related Art Conventionally, an image recording method for recording an image signal on a magnetic disk in an analog manner is known.
An image signal of one field is recorded on a track. In this image recording method, an image is recorded on a track-by-track basis. Therefore, in the conventional erasing apparatus, a mode for erasing the recording of an individually designated track and a recording of all the tracks on the magnetic disk are continuously and automatically performed. A mode for erasing is provided.

As an extension of the image recording method, there is known an image and data recording method in which data is frequency-modulated, superimposed on an FM image signal, and recorded on a magnetic disk.

[Problem to be Solved by the Invention] As described above, the problem of erroneous erasure is associated with the image recording method. In order to prevent erroneous erasure, the magnetic disk is provided with a nail for erasure protection. By breaking this nail, erasing is not possible for all tracks. However, this configuration is effective only when it is desired to save the recorded contents of all the tracks of the magnetic disk, and there is no means for preventing erroneous erasure of the recording of a specific track.

A device that includes information for prohibiting erasure of an image in each image, and when the image is instructed to be erased, if the image includes this information, a device for prohibiting the erasure of the image. Is considered.

However, in such an apparatus, information of prohibition of erasure is once entered, but in the case where the erasure is to be performed later, the image itself cannot be erased without erasing the information of erasure prohibition. Is troublesome.

Accordingly, it is an object of the present invention to provide an erasing device that can erase even an image designated to be prohibited by a simple operation.

[Means for Solving the Problems] An erasing apparatus according to the present invention comprises: an identification unit that identifies whether an image data erasure prohibition signal is attached to image data stored in a recording medium; Erasing means for erasing image data identified as not having an image data erasure prohibition signal from the recording medium in response to the image data erasure instruction; and image data having the image data erasure prohibition signal. Receiving means for receiving a manual operation of the user to permit erasing of the image, wherein the erasing means is responsive to the erasing instruction while the receiving means is receiving the manual operation of the user. The image data to which the data erasure inhibition signal is added is erased from the recording medium.

[Operation] By the above means, erasing can be prohibited in a normal erasing operation, and erroneous erasing can be prevented before it occurs. When the user wants to delete an image that has been prohibited from being deleted, the user can instruct the user to delete the image while operating the receiving unit, so that the image that is prohibited from being deleted can be deleted by a simple special operation.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an image and data recording / reproducing apparatus having one embodiment of the present invention. In FIG. 1, 10 is a magnetic disk having 50 tracks, 12 is a spindle motor for rotating the magnetic disk 10, 14 is a servo circuit for rotating the motor 12 at a predetermined constant speed, 16
Is a magnetic head, 18 is a head drive circuit for moving the magnetic head 16 in the radial direction of the magnetic disk 10, and 20 is a switch connected to the a contact during reproduction and to the b contact during recording (and erasing). The switch 20 is normally connected to the a contact.

22 is a reproduction amplifier for amplifying the output of the magnetic head 16, 24 is an envelope detection circuit for detecting the envelope of the output of the reproduction amplifier 22 for judging the presence or absence of recording, and 26 is an image reproduction such as de-emphasis to the output of the reproduction amplifier 22. An image reproduction processing circuit that performs processing and outputs a video signal; 28, an ID detection circuit that detects ID data recorded superimposed on the image signal; 30, an ID demodulation circuit that demodulates the detected ID data;
Is a character generator (CG) for outputting a video signal for a designated character; 34 is an adder for superimposing the output of CG32 on the output (reproduced image signal) of the image reproduction processing circuit 26;
36 is a reproduced image output terminal, and 38 is an image monitor device.

40 is a video signal input terminal, 42 is an image recording processing circuit that performs image recording processing such as emphasis and conversion to a recording format (brightness / color difference line sequential) on the video signal input to the video input terminal 40, and 44 is a recording A buffer for ID data to be superimposed on an image signal to be superimposed, 46 is an ID modulation circuit for modulating ID data in a buffer 44, 48 is an adder for frequency-multiplexing the output of the ID modulation circuit 46 to the output of the image recording processing circuit 42. is there. 50 is an erasing circuit for generating an erasing signal, and 52 is a
This is a recording / erasing changeover switch connected to the contact and connected to the contact b during recording. Switch 52 is normally connected to the b-contact. A recording amplifier 54 amplifies a recording signal or an erasing signal.

56 is composed of ROM, RAM, IO and digital arithmetic circuit,
A control circuit for controlling the entirety, 58 is a detector for detecting the state of the nail for erasing protection of the magnetic disk 10, 60a is a track feed switch for instructing the magnetic head 16 to move to the inner track, and 60b is a reverse switch. A track return switch for instructing movement of the magnetic head 16 to the outer track, 62a is a recording mode switch, 62b is a recording execution switch, 64a is an ID recording mode switch, 64b is a switch for inputting numerical values, and 64c is an input. Shift switch for changing digits, 66
Is a protect switch for instructing the setting of a protect code, 68a is an erase standby switch, 68b is an all erase switch for instructing erase of all tracks, and 68c is a single erase switch for instructing erase of a designated track.

First, the reproducing operation will be briefly described. When the magnetic disk 10 is loaded, the motor 12 rotates, and its rotation speed is kept constant by the servo circuit 14. The magnetic head 16 is first positioned on the first track. By operating the feed switch 60a and the return switch 60b, the magnetic head 16 can be positioned on a desired track. In the reproduction mode, the switch 20 is connected to the contact a, and the output of the magnetic head 16 is amplified by the amplifier 22 and applied to the image reproduction processing circuit 26, the ID detection circuit 28 and the envelope detection circuit 24. The control circuit 56 can determine the presence or absence of recording based on the output of the envelope detection circuit 24.

The image reproduction processing circuit 26 performs a reproduction process such as a de-emphasis process and outputs a standard format video signal. The ID detection circuit 28 separates and detects the ID data signal superimposed on the image signal, and the ID demodulation circuit 30 demodulates the signal, and outputs the reproduced ID data to the control circuit 56. The control circuit 56 plays
Code of ID data to be displayed on the screen, for example, ASCI
Outputs I code to CG32. The CG 32 outputs a video signal corresponding to the character code from the control circuit 56. The adder 34 superimposes the output of the CG 32 on the output of the image reproduction processing circuit 26 (reproduced video signal). The output of the adder 34 is supplied to an image monitor 38 via an output terminal 36, where a reproduced image and its data are displayed.

If no signal is recorded on the track where the magnetic head 16 is located, the screen of the image monitor device 38 becomes a noise screen.

Next, the recording operation will be described with reference to FIG. The recording mode is set by turning on the recording mode switch 62a. Even in the recording mode, the switch 20 is connected to the contact a, and the output of the envelope detection circuit 24 determines the presence or absence of recording of the track currently accessed by the magnetic head 16 (S1). , Feed switch 60a
Alternatively, the magnetic head 16 is moved by the return switch 60b to search for an unrecorded track (S2). If all the tracks have been recorded (S3), the process ends. If an unrecorded track is found (S1), check the ID recording mode switch 64a (S1).
4) If it is pressed, check the protect switch 66 (S5).

If the protect switch 66 is off, normal ID data will be recorded. For example, if it is possible to input date data, "_ ::" is displayed on the screen of the image monitor device 38 as shown in FIG. 3A (1), and the input is prompted. The input digit can be moved by the shift switch 64c (S6, 7), and a desired numerical value can be input by operating the numerical value input switch 64b (S8, 9). Until the recording execution switch 62b is pressed (S11), by circulating S4 to S9,
Desired date can be input. For example, when "8" is input by the numerical input switch 64b and shifted by the shift switch 64c as shown in FIG. 3A (2) at the first digit, the display screen becomes the state of FIG. 3A (3). . Finally, the date can be input as shown in FIG. 3A (4).

After completing the date input, press the record execution switch.
Press 62b (S11). In response, control circuit 56 connects switch 20 to contact b. The image recording processing circuit 42 records the video signal input to the input terminal 40, and
Receives, from the control circuit 56, the ID data including the previously input date data via the ID buffer 44, modulates the data, and outputs the modulated data. The adder 48 outputs an ID to the output of the image recording processing circuit 42.
The output of the modulation circuit 46 is frequency-multiplexed. The output of the adder 48 is applied to the magnetic head 16 via the switch 52, the amplifier 54, and the switch 54, and is recorded on the track accessed by the magnetic head 16 at that time (S12).

If the protect switch 66 is on (S5), a code or code string indicating protection, for example, "{PROTECT}" is added after the input data described above (S10).
Then, according to the recording execution switch 62b (S11), the image is recorded together with the ID data including the protect code as described above (S12).

Next, the erase operation will be described with reference to FIG. When the erase standby switch 68a is pressed, the control circuit 56 enters the erase mode, waits for the all erase switch 68b or the single erase switch 68c to be turned on (S20), and determines which one has been pressed (S21).

In the case of the single erase switch 68c, first, the magnetic disk 1
The detector 58 checks whether or not the protection nail of 0 is broken and protected by the detector 58 (S22). If it is protected, the process is terminated. If it is not protected, the recorded ID data is read (S23). It is checked whether protected data is included (S24). Protect
When data is included, a display such as that shown in FIG. 3B appears in the ID data portion of the playback screen. If protected data is included, the protect switch 66 is checked (S25). If it is pressed, the erasure of that track is executed (S26). If it is not pressed, the process ends.
If no protected data is included (S2
4), erase one track as it is. At the time of execution of this erasure, the control circuit 56 connects the switch 52 to the contact a and causes the erasure circuit 50 to generate an erasure signal. This erase signal is applied to the magnetic head 16 via the switch 52, the amplifier 54 and the switch 20.

If the all erasure is designated (S21), the protect nail of the magnetic disk 10 is checked (S27), and if it is broken, the process is terminated. If not, the magnetic head 16 is moved to the first track (S28). ) And read the ID data (S2
9), it is checked whether protected data is included (S30). If protected data is included,
The protect switch 66 is checked (S31), and if it is pressed, the erasure of that track is executed (S32). If no protected data is included (S30), 1
The track is erased (S32). After the erasure (S32), it is checked whether the track is the 50th track (S33). If not, the magnetic head 16 is moved to the next track (S34).
Repeat steps 29 to S33. When the processes of S29 to S33 are performed up to the 50th track (S33), the process ends.

Although the protect data has been described as “{PROTECT}”, it may be any other code or code sequence. Although one protect switch 66 is used for both recording and erasing, separate switches may be used.

In this embodiment, the magnetic disk is used as the storage means, but the present invention is not limited to this, and an optical disk or a solid-state memory (for example, a semiconductor memory) may be used. Various means are also used as the erasing means according to the characteristics of the storage means.

[Effects of the Invention] As can be easily understood from the above description, according to the present invention, when erasing image data to which erasure prohibition information is added, first erase the erasure prohibition information, and then delete the image data. It is not necessary to perform a two-stage erasing operation of performing an operation for erasing the image data, so that the image data to which the erasure prohibition information is added can be erased without requiring the user to take time and effort.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a flowchart of a recording operation, FIG. 3A is a screen display when inputting date data as ID data, and FIG. 3B is protect data. FIG. 4 is a flowchart of an erase mode in which the ID data is displayed. 10: Magnetic disk, 16: Magnetic head, 28: ID detection circuit, 30:
ID demodulation circuit, 32: Character generator (CG), 50:
Erasing circuit, 56: control circuit, 60a: track feed switch, 6
0b: Track return switch, 62a: Recording mode switch, 62b: Recording execution switch, 64a: ID recording mode switch, 64b: Numerical input switch, 64c: Input digit change switch, 66: Protect switch, 68a: Erase stand-by·
Switch, 68b: All erase switch, 68c: Single erase switch

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 5/024 G11B 19/04

Claims (2)

(57) [Claims] An identification means for identifying whether or not an image data erasure prohibition signal is attached to image data stored in a recording medium; and an identification means for identifying whether or not the image data erasure inhibition signal is attached by the identification means. Erasing means for erasing the selected image data from the recording medium in response to the erasing instruction for the image data; and manually operating the user to permit erasing of the image data to which the image data erasure inhibition signal is attached. Receiving means for receiving, while the receiving means is receiving a manual operation of a user, the erasing means receives the image data to which the image data erasure prohibition signal is added in accordance with the erasing instruction. An erasing device for erasing from the recording medium. 2. The apparatus according to claim 1, further comprising: batch erasing instruction means for instructing erasing of the plurality of image data stored in said recording medium at a time, wherein said erasing means responds to an instruction from said batch erasing instruction means. The erasing apparatus according to claim 1, wherein only the image data to which the image data erasure inhibition signal is not attached is erased from the recording medium.