JPS61243991A - Information recording and reproducing method - Google Patents

Abstract

PURPOSE:To shorten the time required for verification by inverting a list direction of information at the time of recording data. CONSTITUTION:At the time of a forward motion, etc. of a relative reciprocating motion of an information recording medium such as a card, etc., and a head, recording is executed for the card, and at the time of a return motion, it is reproduced, and whether the recording is correct or not is verified. In this case, when the recording is executed by inverting a list direction of recording information, the verification processing is simplified, and the time required for verification is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an information recording and reproducing method, and particularly to an information recording and reproducing method in which information is recorded and reproduced by relative reciprocating motion between a head and an information recording medium.

[Prior Art] Conventionally, various types of media such as disk-shaped, card-shaped, and tape-shaped media are known for recording information using magnetism, light, etc., and for reading recorded information.

Among these, card-shaped information recording media are expected to be in great demand as they are small, compact, and convenient to carry.

By the way, because of its shape, the above-mentioned card-shaped information recording medium usually uses relative reciprocating motion with the head to record, reproduce, and check whether information has been correctly recorded (
(hereinafter referred to as "verify"), which is conventionally performed, for example, as shown in FIG. 1(A).

The sequence shown in CB) and (C) was used.

Figure 1 shows a method of recording information with a head on an information track on a relatively stationary information card, and verifying and reproducing information. Tracks 1-0 to 4-0 are paths along which the head moves on the medium relative to the medium during recording (hereinafter referred to as recording paths); 1-2 to 4-2 are paths in which the head moves relative to the medium during verification (hereinafter referred to as verification paths). The arrows indicate the direction of movement of the head relative to the medium in each pass.The recording pass, return pass, and verify pass are drawn separately for convenience of drawing, but the actual The operations are, of course, colinear, ie, on the information track.

First, the original information (information to be recorded) is recorded without changing the alignment direction while the head moves over the information card along the recording path 1-0, and recording of one track is completed. In the return pass 1-1 in which the head feeding direction is reversed, no processing such as reading information is performed, and in the verify pass 1-2 in which the head feeding direction is reversed again, recording confirmation, that is, verification is performed. It will be done. When the verification of track 1 is completed, the head moves to track 2 and performs the same process, i.e. recording with recording pass 2-0, return pass 2-°1.
Recording on the information card and verification are completed by repeating the subsequent reversal of the head, verification in verification pass 2-2, movement of the head to the next track 3, etc.

The conventional information recording/reproducing method using an information card in which information is recorded, verified, and reproduced in the above sequence has several drawbacks as described below.

In the same figure (B), 1-3 to 4-3 indicate the arrangement direction of the information recorded on the information tracks 2 to 4 on the information card, and the recording path shown in the same figure (A) This is the same direction as 1-0 to 4-0. In the above sequence, in order to simplify data processing during verification, verification directions 1-2 to 4-
In order to match 2 with the arrangement direction 1-3 to 4-3 of the original information, return paths 1-1 to 4-1 in which no information processing is performed (hereinafter referred to as "empty feed") are required. The disadvantage is that the total time for recording and verifying is long.

Moreover, since the relative reciprocating motion between the head and the information card is used, there is a limit to how high the speed can be mechanically increased.

In addition, (C) in the same figure shows a conventional example of simultaneously reading information recorded on multiple information tracks using multi-heads or multi-beams in order to read information at high speed without putting a burden on the mechanical mechanism. In the same figure, l
-4 and 2-4 are the movement paths of the head relative to the medium (hereinafter referred to as reproduction paths) for simultaneously reading the information recorded on information tracks 1 and 2, and 3-4 and 4-4 are information tracks. In this case, playback paths 2-4 and 3 indicate the playback paths for simultaneously reading the information recorded in 3.4.
-4 direction is the direction in which the recorded information is arranged 2-3
and 3-3, the playback data processing becomes complicated. Moreover, if the direction of the playback path is opposite to the direction in which the recorded information is arranged, there is a high possibility that errors will occur in the playback data due to scratches, dust, etc. that occur on the information card during playback. Considering these points, this is a significant disadvantage.

[Summary of the Invention] An object of the present invention is to provide an information recording method that eliminates the drawbacks of the conventional example described above and shortens the total time required for recording and verifying.

A further object of the present invention is to provide an information recording and reproducing method that can shorten the time required for reproduction by simultaneously reading information recorded on a plurality of tracks with simple processing.

In the information recording/reproducing device according to the present invention.

By relatively reciprocating the head and the information recording medium, an information track is formed in the direction of the reciprocating movement on the information recording medium, and a plurality of information tracks are formed in a direction substantially perpendicular to the direction of the reciprocating movement. All information about the track.

The above object is achieved by recording so that the direction in which information is arranged on the recorded information track is always opposite to the direction in which the head moves relative to the information recording medium during recording. The present invention will be explained in detail below using the drawings.

[Embodiment] FIG. 2 is a diagram showing an embodiment of the information recording and reproducing method of the present invention, and shows a method in which information is recorded on an information track on an information card with a head, and verification and reproduction are performed.

In the same figure (A), 11.12.13.14 is the information track, 11-0.12-O113-0, 14-0 is the recording path, and 11-1.13-1 is the return track immediately after recording. pass, 1
1-2.12-2.13-2.14-2 are verification passes, and the arrow is the relative feeding direction of the head to the medium. Although the recording pass, return pass, and verify pass are drawn separately for convenience of drawing, the actual operations are of course on the same line, that is, on the information track. Information track 1
1, the head performs the return pass 11- of recording the previous track.
1, the original information is reversed and sent, and in recording pass 11-0, the original information is recorded on the information track 11 with its arrangement direction reversed. When the recording on the information track 11 is completed, the head feed is reversed again, the recorded information is verified in a verify pass 11-2, and the head moves to the information track 12.

Next, the head moves to information track 12 in recording pass 12-0.
The original information is recorded on the top with the arrangement direction reversed, and after the recording is completed, the head feed is reversed, and after verification is completed in pass 12-2 of verification.

The head moves to the information track 13.

In the subsequent sequence, odd-numbered tracks are the same as track 11, and even-numbered tracks are the same as track 12. In other words, a return pass exists for odd-numbered tracks, but a return pass is not required for even-numbered tracks.In addition, for any information track, the relative movement speed of the head and card during verification is the same as that during playback. Do this almost equally.

Figure (B) shows the arrangement of information recorded on the information tracks. 11-3.12-3.13-3.14-3 are the arrangement of information on the information tracks 11-14, respectively. Also, the direction of the recording passes l1-0 to 14-0 is opposite to that of the recording passes l1-0 to l14-0, while the direction of the verify passes l1-2 to l4-2 is always the same. This has the advantage that no special processing is required for the regeneration processing at the time of the 2nd eye.

In addition, (C) in the same figure shows that two tracks can be read simultaneously using means such as multi-head or multi-beam without changing the relative moving speed of the head and the information card, that is, without putting a burden on the mechanism. 11-4 and 12-4.13- showing a method for improving information reading speed by performing
4 and 14-4 are information track pairs 11 and 12.4, respectively.
As is clear from the figure, which shows the direction of the playback path when simultaneously reading information 13 and 14, the directions 11-4 to 14-4 of the playback path on each track are all on each information track. Since the sequence is the same as the recorded information, no special processing is required during playback.

Furthermore, as mentioned above, in this embodiment, the return path on which no information processing is performed occurs once every two tracks.
There is also the advantage that the total time for recording and verifying is shortened compared to the previous embodiments.

Also, the relative movement speed of the head and information card during verification and playback were made equal.

There is also the advantage that the information reproducing circuit can be shared.

Furthermore, when using an optical information recording card, the relative movement speed between the head and the card is usually slow during recording because it depends on the sensitivity of the medium, and faster during playback, so the This embodiment, in which the relative moving speeds of the head and the information card are approximately equal, can further significantly shorten the time required for recording and verifying compared to the conventional example.

Note that in the present invention, it is necessary to rearrange the information during recording, but since no errors occur during recording, processing can be performed extremely easily.

In the above embodiment, the arrangement of information was reversed and recorded every two tracks on the assumption that two tracks would be read simultaneously.
The present invention is not limited to this, but as the number of tracks that are read simultaneously increases, the number of empty feeds decreases, and the total time required for recording and verification can be shortened. For example, assuming that n tracks are to be read simultaneously, if the direction of arrangement of information is to be reversed for each (n) rack, it is sufficient to perform blank feeding at a rate of one track for every n tracks.

As explained above, according to the present invention, by performing a simple process of reversing the arrangement direction of information during recording on all tracks, it is possible to easily perform the helipading process. Furthermore, when reading multiple tracks simultaneously, it is possible to perform recording and verification at high speed without putting a burden on the mechanism, and furthermore, it is possible to simplify the reproduction processing at that time.

[Brief explanation of the drawing]

Figures 1 (A), (B), and (C) are explanatory diagrams showing conventional recording, verifying, and reproducing methods; Figures 2 (A), (B, and C)
FIG. 2 is an explanatory diagram showing a recording, verifying, and reproducing method in an embodiment of the present invention. 11.12.13.14... Truck, 11-0
-14-0...Record path, 11-1.13-1...
Return pass, 11-2 to 14-2...Verify pass.

Claims (4)

[Claims] (1) By relatively reciprocating the head and the information recording medium, an information track is formed in the direction of the reciprocating movement on the information recording medium, and a plurality of information tracks are formed in a direction substantially perpendicular to the direction of the reciprocating movement. In the information recording and reproducing method formed as described above, for all information tracks,
An information recording and reproducing method characterized in that recording is performed such that the direction in which information is arranged on a recorded information track is always opposite to the direction in which a head moves relative to an information recording medium during recording. (2) The information recording and reproducing method according to claim 1, wherein the arrangement direction of the recorded information is reversed for each track group formed by a plurality of tracks. (3) Claims 1 or 2 which confirm whether or not information has been correctly recorded when the direction of movement of the head relative to the information recording medium is opposite to the direction during recording.
Information recording and reproducing method described in section. (4) The information recording and reproducing method according to claim 3, wherein the relative movement speed of the head with respect to the information recording medium is substantially the same during reproduction and when confirming whether or not information has been correctly recorded.