JPS63282904A - erasing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an erasing device for erasing information on a medium such as a floppy disk, which has a mix of video recording tracks and audio recording tracks, such as an electronic still camera. It relates to a device with functions.

[Conventional technology]

FIG. 3 shows a flowchart of a conventional example.

Conventionally, in a still video recording/reproducing apparatus equipped with an erasing function, there has been an erasing procedure as shown in FIG.

To erase, first press “ERASE 5TANBY”
Switch to mode. Next, if the mode is not the playback mode, the mode is switched to the playback mode, and the image where the head is currently tracking ON is played back.

By confirming the picture to be erased on the monitor and pressing the ERASEON switch, one track is erased.

[Problems to be Solved by the Invention] In the conventional example described above, the following problem occurred when erasing a floppy disk containing a mixture of audio and video signals.

(1) When erasing an audio signal, the content cannot be confirmed.

(2) When the image signal corresponding to the audio signal is erased, it becomes necessary to change the content specified by the control code on the track of the audio signal.

A first object of the present invention is to solve the above-mentioned problems.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides an erasing device for erasing a medium on which audio signals and video signals are recorded in a mixed manner, and the present invention provides a first erasing mode for erasing the video signal and a first erasing mode for erasing the video signal. A second erasing mode is provided to erase the audio signal.

[Effect]

In the above configuration, the first erasing mode and the second erasing mode can be changed depending on the types of audio signals and video signals recorded on the medium.

〔Example〕

(2) In this embodiment, the following three modes are provided for erasure (ERASE).

a) ERASE only VIDEO. Compatible AUDI
When O is present, ERASE is prohibited b) VIDEO (!l: ERASE both AUDIO c) ERASE only AUDIO.

II) When set to ERA, SE 5TANBY mode,
V is written where the head is racked (on)
When it is an IDEO signal and an AUDIO signal corresponding to the VEDEO signal exists on the floppy, there is a VIDE with AUDIO on the monitor or somewhere on the device.
Displays that it is O.

III) When set to ERASE 5TANBY mode,
The head is the track where AUDIO is recorded (AUD
IO track), the track where the VIDEO corresponding to that AUDIO track is recorded (V
Move the IDEO head and play the VIDEO signal.

With the above sequence, when erasing a floppy disk which is a medium in which AUDIO tracks and EO tracks coexist, it is possible to classify the contents of (1) AUDIO racks by corresponding images.

(2) It becomes possible to determine whether there is an AU or DIO corresponding to the VIDEO track or not.

(3) By separating the modes for erasing VIDEO tracks and erasing AUDIO racks, it is possible to avoid accidentally erasing VIDEO racks with AUDIO.

Next, an embodiment of the apparatus having the above-mentioned functions will be described with reference to the drawings.

First, the operation of the embodiment of the present invention will be explained using a flowchart.

Figure 1 is a flowchart showing a first embodiment of the present invention.

In Figure 1, ERASE 5TANBY switch 2
When the ERASE 5TANBY mode is entered by 0, first check whether head 3 is in the VIDEO rack or AUD.
It is determined whether it is on the EIO track (Sl). AUDI
If it is on the O track, the playback position of the head 3 is moved to the VIDEO track corresponding to that AUDIO rack (S3). The number of the corresponding VIDEO rack is written in the AUDIo track, and the AV
The determination circuit 8 performs such determination.

In this state, you can confirm the image of the track to be erased or the image of the VIDEO) rack corresponding to the AUDIO) rack to be erased.

AUD corresponding to the VIDEO rack being played next
If there is IO, it is displayed on the screen (S5).

This display may be superimposed on the screen, or other display elements may be provided outside the screen.

Here, the mode selection of erasing the VIDEO) rack, erasing the AUDIO) rack, or erasing both is performed using switches 21 and 22, which will be described later (S7 and S8).
).

AUDIO corresponding to S9 in VIDEO erase mode
If the presence of a track is detected, erasing is not performed. If there is no corresponding AUDIO, the track is erased (Sll) when the ERASE switch 23 is pressed (SIO).

When in AUDIO erase mode, move the head to the corresponding AUD
After moving to the IO track (S8), when the ERASE switch 23 is pressed, the AUDIO sequence is erased (SIO, 5il).

Both erasing mode i.e. VIDEO erasing mode AUDI
When neither O erase mode is specified, ERA
When the SE switch 23 is pressed (S12), the V
Erase the IDEO track and the corresponding AUDIO sequence.

This embodiment uses AUDI tracks that correspond to VIDEO tracks.
Automatically AUDIO ERASE if there is an O track
This is the mode.

In Figure 2, when the ERASE 5TANBY mode is entered (520), if the head is in the AUDIO rack (S21), the VI corresponding to that AUDIO
DEO) go to the rack ((S22). And the corresponding AU
The presence of DIO is displayed (S23). Head is VID
If it is in the EO track (S24), the corresponding AU
When there is DIO, that fact is displayed (S23).

When the ERASE ON switch is pressed (S25
), if there is no corresponding AUDIO (S26), the track is erased (S27/). Compatible AUDI
When there is O, it becomes the AUDIO erase mode, goes to the corresponding AUDIO track (S27), and erases that AUDIO.
After deleting the sequence (S28), the corresponding VIDE
Return to O track (S29).

Next, a configuration for realizing the above functions will be explained using FIG. 4.

FIG. 4 is a block diagram showing the configuration of an embodiment of the present invention.

In Fig. 4, 1 is a magnetic sheet, 2 is its rotating motor,
3 is a recording or reproducing head composed of a magnetic head; 4 is a recording or reproducing coil wound around the recording or reproducing head 3; 5 is "ERASESTANBY" when the information recorded on the magnetic sheet 1 is set to erase standby state.
This switch is switched to the "ERASE" side when performing an erase operation in the erase standby state.

6 is a playback amplifier, 7 is an FM demodulator that performs FM demodulation of the output from the playback amplifier 6, and 8 is an FM demodulator that demodulates the output from the playback amplifier 6 to the access position of the head 4. Whether the signal recorded at the access position of the head 4 is an audio signal or a video signal. This is an AV discrimination circuit that discriminates whether the signal is a video signal or not.

It is also possible to detect the corresponding track number by determining the ID signal recorded together with the audio signal. 9 is F
An NTSC encoder that converts the output of the M demodulator 7 into an NTSC signal, 10 a display device that reproduces the output of the encoder 10, 11 an erasure signal generator that generates an erasure signal, 12
15 is an amplifier for erasing signal amplification; 15 is a character generator that generates a signal to indicate that there is a corresponding AUDIO at 85 in FIG. 1 and 823 in FIG. 2;
7 is a head moving mechanism for changing the playback position of the head 3; 1;
9 is a flowchart for controlling each circuit to execute the claw shown in FIGS. 1 and 2; 20 is an ERASE 5
Switches 21 and 22 are for setting TANDBY, and VIDE is for setting the mode for erasing the video signal and audio signal, respectively.
These are the OERASE switch and the AUDIO ERASE switch. 23 is an ERASE switch for executing ERASE. Reference numeral 25 denotes a reproduction circuit that performs reproduction processing of the audio signal, and includes a time axis expansion circuit. 27 is a speaker for reproducing audio.

When erasing the information recorded on the magnetic sheet 1, first turn the switch 5 to "ERASE 5TANB".
By switching to the "Y" side, the erase standby state is set. In this state, the playback mode is automatically set, so the erase standby state is set, that is, the signal recorded on the track to be erased before erasing. is amplified by a regenerative amplifier 6 and demodulated by an FM demodulator 7.Then, this signal is judged by an AV discrimination circuit 8 whether it is a video signal or an audio signal.This signal is a video signal. If, N
The video is converted into an NTSC signal by a TSC encoder 9 and displayed on a display device 10 such as a CRT display. At this time, if there is a track on which an audio signal has been recorded corresponding to the video signal, it is displayed on the display device IO to notify that the track exists.

Furthermore, when the signal is an audio signal, the video signal is displayed on the display device 10 if there is a track in which a video signal corresponding to the audio signal has been recorded.

Next, when the switch 5 is switched to the "ERASE" side, an erasing signal is generated from the erasing signal generator 11, amplified by the recording amplifier 12, and the information recorded on the track is erased by the erasing signal.

According to the embodiment described above, it is possible to identify the content when erasing an audio signal.

Also, there is no need to randomly erase audio and video signals (
Therefore, the correspondence between the contents of the control code on the audio track and the video signal does not collapse.

[Effects of the Invention] As explained above, according to the present invention, even a medium in which a mixture of video signals and audio signals is recorded can be reproduced satisfactorily.

[Brief explanation of drawings]

FIG. 1 is a flowchart of the first embodiment of the present invention;
The figure is a flowchart of the second embodiment of the present invention, FIG. 3 is a diagram showing the conventional operation,

Claims (3)

[Claims] (1) An erasing device that erases a medium on which audio signals and video signals are recorded in a mixed manner, including a first erasing mode that erases the video signal and a second erasing mode that erases the audio signal. An erasing device characterized by having an erasing mode. (2) In the first mode of erasing the video signal, when there is an audio signal track corresponding to the video signal recorded track, display means for notifying that there is an audio signal recorded track before the video signal is deleted. An erasing device according to claim 1, characterized in that the erasing device is provided with: (3) In the case of the second mode of erasing the audio signal, a patent claim characterized in that, before erasing the recorded audio signal, means for reproducing the recorded video signal corresponding to the audio signal track is provided. The erasing device according to item 1.