JPH03269803A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To erase/keep a specified track only by providing a track discriminating means for discriminating the kind of information recorded on a track and a means for performing an automatic erasing or unerasing operation on all of such tracks as recorded with a specified kind of information out of the recorded information. CONSTITUTION:When a switch is turned on, a spindle motor 2 is rotated at a constant speed, and a head 8 is made to access a track number 1 by a step ping motor 4. The kind of a signal to be taken out of the head 8 via a preampli fier 9 is discriminated by a track discriminating circuit 10, and when it is not a picture track, this track is erased, and when it is a picture track, the track is survived. The head is allowed to progress by the stepping motor 4 by one track between track numbers 1-49, but the motor 4 is stopped at the final track number 50.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a magnetic recording/reproducing device using a magnetic sheet (magnetic disk) provided with a plurality of concentric tracks.

(b) Conventional technology Magnetic recording and reproducing devices that form a plurality of concentric tracks on a magnetic sheet include floppy disk drives and hard disk drives, which are external storage devices for computers and word processors, and the magazine ``Television Technology Σ''. There is an electronic still camera like the one described in the April 1989 issue.

(c) Problems to be solved by the invention By the way, in the electronic still camera described in the above magazine, it is not possible to erase the contents of the track by dividing it.
Only track erasing, all track erasing, or erasing by specifying the physical location of the track on the disk can be performed. Therefore, for example, if you try to erase all the audio tracks in advance on a disc that has both image tracks and audio tracks, in order to change the audio track to an image track, or to quickly perform dubbing of the audio track. , it is necessary to use some method to perform the erasing operation while checking the information content of each track (whether it is a video track or an audio track), and it is not possible to automatically erase a continuous track. Therefore, it requires complicated operations and time when used.

The present invention therefore seeks to overcome these drawbacks.

B) Means for Solving the Problems The present invention provides a plurality of concentric tracks on a magnetic sheet, and independently records and records a plurality of types of information such as image information, audio information, and data on each track. 7/ Or in a magnetic recording and reproducing device for reproducing, a track identifying means for identifying the type of information recorded on the track, and a track identifying means for identifying the type of information recorded on the track, and a track identifying means for identifying the type of information recorded on the track, and a track identifying means for identifying the type of information recorded on the track, and a track identifying means for identifying the type of information recorded on the track; This configuration includes erasing/non-erasing means for automatically erasing or non-erasing the data.

(e) Operation It becomes possible to automatically and continuously perform operations for erasing or preserving only a specific type of information track on a working disk.

(f) Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of an electronic still camera embodying the present invention. (1) is a floppy disk (magnetic disk) capable of recording 50 tracks. The spindle motor (2) is the spindle motor driver (3)
is driven by. Similarly, the stepping motor (4) is driven by a stepping motor driver (5), each controlled by a microcomputer (6). Head access is performed by a two-ohm gear (7) linked to a stepping motor (4). The reproduced signal taken out from the head (8) passes through a preamplifier (9), and the track identification circuit (10) identifies its type (in this case, whether it is an image or not), and sends this information to the microcomputer (6). . It is possible to identify whether it is an image track or not by, for example, demodulating the reproduced signal and extracting the synchronization signal, and then recognizing the regulatory nature of the synchronization signal. Further, it is possible to identify whether the track is an audio track or not by recognizing the control code, etc. defined in the 7-ohm format after demodulating the reproduced signal. When the track is to be erased, the microcomputer (6) requests the erase timing generation circuit (11) to generate an erase pulse and supplies it to the erase circuit (12). Erase circuit (1
2) erases the trunk using the DC/AC erase method.

(13) is an external switch for activating the functions (described in detail below) of the electronic still camera of this embodiment.

FIG. 2 shows an operation flowchart of the electronic still camera in this embodiment. Referring to this flowchart, the operation in FIG. ) is determined to be 0N1OFF. When the switch (13) is turned on, step 2 (
) to rotate the spindle motor (2) at a constant speed (approximately 60 rotations/cycle, which is the image field period for electronic still cameras).
seconds), and in step 3 (S3), the head (8) is accessed to track number 1 by the stepping motor (4). In Step 7 (S4), the track identification circuit 10) identifies the type of signal taken out from the head (8) via the preamplifier (9), and if it is not a single image track, then in Step 5 (S) Erase. If it is an image track, the trunk is kept alive without being deleted.

Step 6 (Ss) is a check to see if the track number is 5-0 (last track). If the track number is 1 to 49, step 7 (Sr) is to move the head for one track by the stepping motor (4). Proceed. By repeating steps 4 and 5, only the image track remains on the floppy disk.

When the track number reaches 50, step 6 (S,)
A branch is taken and the operation ends.

(G) Effects of the Invention When erasing tracks on a magnetic disk, only specific information tracks can be easily erased or kept alive.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electronic still camera embodying the present invention, and FIG. 2 is a diagram showing its operation flowchart. (10)... Trunk identification circuit, (12)... Erase circuit.

Claims (1)

[Claims] (1) A magnetic recording and reproducing device in which a plurality of concentric tracks are provided on a magnetic sheet, and multiple types of information such as image information, audio information, and data are independently recorded and/or reproduced on each of the tracks. track identification means for identifying the type of information recorded on the track; and automatically erasing or non-erasing all tracks in which a specific type of information among the recorded information is recorded. A magnetic recording/reproducing device comprising erasing/non-erasing means for performing an operation.