JPH07272234A - Information recording method - Google Patents

Abstract

PURPOSE:To obtain an information recording method in which scanning of a track can be precisely performed and information can be recorded with high density with a magnetic recording device or a magnetic recording and reproducing device having simple structure. CONSTITUTION:A track group 3 is formed by arranging the prescribed numbers of data tracks 2 having the prescribed length in the direction of width of a tape 1 and also in the almost parallel direction to a longitudinal direction of the tape 1 on the magnetic tape 1. And a first control track 4 in which a tracking signal to precisely scan respective data track 2 is recorded is formed between track groups, and a second control track 5 in which a track group moving control signal to move the reproduced data track 2 between track groups is recorded is formed at the upper part and the lower part of the tape 1 holding the track group 3 between them.

Description

Detailed Description of the Invention

[0001]

[0001]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording method for recording information such as video and audio on a magnetic tape by a magnetic recording device or a magnetic recording / reproducing device.

[0003]

[0002]

[0004]

2. Description of the Related Art Currently, a video tape recorder (VT)
R), voice PCM recorders, etc., often use a so-called helical scan method in which an oblique track is formed on a magnetic tape and recorded by a magnetic head attached to a rotating drum inclined with respect to the width direction of the magnetic tape. ing.

[0005]

Further, an information recording method for forming a track in a direction parallel to the longitudinal direction of the tape by a magnetic head attached to the rotating drum in which the longitudinal direction of the magnetic tape and the rotation axis direction of the rotating drum are perpendicular to each other has been studied. ing.

[0006]

FIG. 3 is a diagram showing a track pattern of a magnetic tape according to an example of a conventional information recording method.

In the figure, the magnetic tape 21 is indicated by an arrow 2.
The video signal tracks 22 (22a, 22b, 22c, ...) Are formed in the direction parallel to the longitudinal direction by the magnetic head which runs in three directions and scans in the direction of the arrow 24. A space for at least one track is sequentially recorded from the top to the bottom of the magnetic tape 21, and video signal tracks 22d, 22e, 22f are sequentially recorded in the space from the bottom to the top.
In the same manner, the scanning tracks are switched to 22g, 22h, ... And recorded sequentially.

[0008]

[0005]

[0009]

By the way, in the above-mentioned helical scan system, since the rotating drum is tilted and rotated with respect to the tape running, complicated control of the running system mechanism of the apparatus is required, and the apparatus becomes complicated. However, there was a problem that it became large.

In the track pattern of the conventional information recording method as shown in FIG. 3, for example, the video signal track 22a is used.
After the .about.22c have been formed, the track 22 between them has been formed.
Since each of d to 22f is formed, a sufficient space is required for the recording. Further, in that reproduction, it is difficult to perform accurate scanning because the tracks are skipped and scanned. Therefore, there is a problem that it is difficult to form tracks at high density and it is difficult to record information at high density.

[0011]

Therefore, the information recording method of the present invention provides an information recording method capable of accurately scanning a track and recording information at a high density by a magnetic recording apparatus or a magnetic recording / reproducing apparatus having a simple structure. With the goal.

[0012]

[0007]

[0013]

The information recording method of the present invention solves the above-mentioned problems and has a predetermined length in the longitudinal direction of a magnetic tape using a magnetic recording device or a magnetic recording / reproducing device. In an information recording method of providing a plurality of substantially parallel data tracks and sequentially recording information on the plurality of data tracks, the plurality of data tracks are regarded as one block, and the data tracks are provided between blocks adjacent in the longitudinal direction of the magnetic tape. A first data track reproduction control signal for performing tracking control during reproduction of these data tracks is recorded corresponding to each of them.

[0014]

Further, a plurality of blocks are provided in the longitudinal direction of the magnetic tape with the plurality of data tracks as one block, and the data track to be reproduced is moved from the data track of a certain block to the data track of another block. It is characterized in that the second data track reproduction control signal is recorded above and / or below the block.

[0015]

Further, the plurality of data tracks are set as one block, and between the blocks adjacent in the longitudinal direction of the magnetic tape, corresponding to each data track, tracking control at the time of reproduction of these data tracks is performed. A second data track reproduction control signal for recording and reproducing one data track reproduction control signal from a data track of one block to a data track of another block is provided above and above the block. And / or recording below.

[0016]

[0010]

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing a track pattern of a magnetic tape according to an embodiment of the information recording method of the present invention.

In FIG. 1, a magnetic tape 1 is recorded with necessary information such as video signals, audio signals or digital data, and data tracks 2 (A _{1 to} A ₆ , in the direction substantially parallel to the longitudinal direction of the tape 1). B _{1 to} B ₆ , C _{1 to} C ₆ ,
..) are formed in the width direction of the tape 1 to form one block, and each track group 3 (3A, 3B, 3) has a rectangular shape.
C, ...) are formed.

Between these track groups 3, the first control tracks 4 (a _{1 to} a ₆ and b ₁ to which record tracking signals for accurately scanning the respective data tracks 2 are recorded.
b ₆ , ...) Is formed.

The first control track 4 is formed corresponding to each data track 2 at one end or both ends thereof, in contact with or in the vicinity thereof, on the extension line of the corresponding data track 2 or parallel thereto. For example, a predetermined pilot signal is recorded as the tracking signal.

[0022]

Further, the data track 2 to be scanned is moved from the data track 2 of one track group 3 to the data track 2 of another track group 3 above and below the tape 1 with the track group 3 interposed therebetween (for example, , A second control track 5 on which a track group movement control signal for moving the data group from the data track A ₆ to the data track B ₆ is recorded.
(5A, 5B) are formed continuously or intermittently in the tape longitudinal direction. As the track group movement control signal, for example, a pilot signal of a predetermined single frequency is recorded in each of them.

[0023]

According to such an information recording method, the magnetic recording device or the magnetic recording / reproducing device having a simple structure enables accurate track scanning and high-density recording / reproducing.

[0024]

Next, an outline of an example of a magnetic recording / reproducing apparatus for recording / reproducing the above-mentioned track pattern by applying the information recording method of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 2 is a block diagram of the essential parts of an example of a magnetic recording / reproducing apparatus to which the information recording method of the present invention is applied.

The magnetic recording / reproducing apparatus 10 has a magnetic head 11 for recording / reproducing the first control track 4 and a magnetic head 12 for recording / reproducing the second control track 5, respectively.
Recording or reproduction is switched by the recording / reproduction changeover switches 13 and 14, and recording or reproduction is performed on the magnetic tape 1.

[0027]

At the time of recording, pilot signals of predetermined frequencies are respectively output from the pilot signal generator 15 as the tracking control signal or the track group movement control signal, respectively, to the first control track 4 recording / reproducing magnetic head 11 and the second magnetic head 11. The control track 5 is supplied to the recording / reproducing magnetic head 12 and is switched to the recording side by the recording / reproducing changeover switches 13 and 14 to perform recording.

[0028]

On the other hand, during reproduction, the first control track 4
The recording / reproducing magnetic head 11 is switched to the reproducing side by the switch 13 to reproduce the first control track 4,
The reproduction output is sent to the tracking control means 16, the tracking error is detected, and the tracking control in the reproduction of the data track 2 is performed.

The reproducing magnetic head 12 for reproducing the second control track 5 is switched to the reproducing side by the switch 14 to reproduce the second control track 5, and the reproduction output is
The data is sent to the track group movement control means 17 to control the movement of the data track 2 between the track groups.

[0030]

In FIG. 2, the magnetic head 11 records and reproduces the first control track 4, and the magnetic head 12 records and reproduces the second control track 5. , First control track 4
The magnetic head for recording the data, the magnetic head for reproducing the data, the magnetic head for recording the data track 2 (not shown) and the magnetic head for reproducing the data may be dedicated magnetic heads or combined magnetic heads.

These magnetic heads are provided on a rotary drum (not shown) which rotates about a rotary shaft perpendicular to the longitudinal direction of the tape, and the magnetic tape 1 is wound around the rotary drum to rotate the rotary shaft of the rotary drum. The rotary drum is rotated while traveling in the right angle direction, and recording / reproducing of the data track 2 and the first control track 4 is performed.

The rotary drum is constructed to be movable in the axial direction of the rotary shaft.

[0033]

The magnetic head for recording the second control track 5 and the magnetic head for reproducing the second control track 5 may be dedicated magnetic heads.

These magnetic heads are fixed at positions where they come into contact with the magnetic tape 1, and recording / reproduction of the second control track 5 is performed by the running of the tape 1.

[0035]

The main part of the magnetic recording / reproducing apparatus 10 is constructed as described above and records / reproduces the above-mentioned track pattern.

Next, the recording / reproducing method will be described.

[0037]

First, a recording / reproducing method for the data track 2 will be described.

For example, assuming that the tape running direction is arrow 6 and the scanning direction of the magnetic head is arrow 7, the data track A ₁ is scanned by the magnetic head in the direction of arrow 7 with the tape stopped. Next, the magnetic head or the entire rotary drum moves downward by one track, the track A ₂ is similarly scanned, and the data tracks A _{3 to} A ₆ of the track group 3A are sequentially scanned in the same manner.

Next, the tape 1 is moved to a position where the data track of the next track group 3B is scanned by the driving means and stopped. After that, the data tracks B ₆ , B _{5 to} B ₁ are sequentially scanned from bottom to top in the same manner.

[0040]

In addition, as a method of recording / reproducing a data track, for example, the tape 1 is wound around a rotary drum of a desired length and is made to run for a certain period of time, and the recording or reproduction timing is controlled by switching the magnetic head to run the tape. There is also a method of forming the rectangular track group 3 by moving the recording or reproducing position so as to match the movement of the track end portion due to.

[0041]

Further, stable recording / reproducing can be performed by moving the rotary drum up and down at a constant speed and continuously operating it. In such a case, the magnetic head fixed to the rotary drum moves spirally. However, the tracks are formed to be slightly inclined with respect to the tape longitudinal direction.

Therefore, if the magnetic head is fixed to the rotating drum so as to be movable up and down to some extent, and the height of the magnetic head with respect to the tape is controlled to be constant during one track scanning, the magnetic head is parallel to the longitudinal direction of the tape. It is also possible to scan the track.

[0043]

Next, an example of a recording / reproducing and tracking control method for the first control track 4 will be described.

The first control track 4 is, for example, a magnetic head attached to a rotary drum, and is used as a data track 2.
Corresponding pilot signals are recorded at one end or both ends of the data track 2, in contact with or in the vicinity thereof, in accordance with the recording. Then, when the data track 2 is reproduced, the first control track 4 is also reproduced, the tracking error is detected by the tracking control means 13 from the output signal, and for example, the position of the rotary drum with respect to the tape 1 is reduced in the direction of reducing the error. Is controlled.

[0045]

As a tracking error detection method, for example, the reproduction outputs of the first control tracks 4 at both ends of the data track 2 are compared to detect the tracking error.

Also, pilot signals of different frequencies are recorded on the first control tracks 4 adjacent to each other in the tape width direction, and crosstalk signals are output from both adjacent tracks of the first control track 4 scanned by the magnetic head. There is also a method of detecting the tracking error by comparing the reproduction output levels of the pilot signals recorded on the respective tracks to be reproduced.

Further, the first control track 4 and the data track 2 are formed so as to be shifted by ½ of the track width, and the first control track is reproduced over two adjacent tracks. It may be configured to detect the tracking error by comparing two reproduction outputs.

[0048]

Next, a method of recording / reproducing the second control track 5 and a track group movement control method will be described.

A pilot signal is recorded on the second control track 5 by, for example, a fixed magnetic head in response to the movement of the track group at the time of recording the data track 2. When the data track 2 is reproduced, the pilot signal is reproduced and detected. By doing so, the movement of the magnetic head between the track groups is controlled. This is done, for example, by controlling the tape running or by controlling the switching of the magnetic head.

Further, the recording / reproduction of the second control track 5 can be performed almost similarly by the magnetic head attached to the rotary drum.

[0051]

According to such a magnetic recording / reproducing apparatus, it is possible to accurately scan the track and to record / reproduce information at a high density with a simple structure.

[0052]

[0026]

[0053]

As described above, according to the information recording method of the present invention, a magnetic recording device or a magnetic recording / reproducing device having a simple structure enables accurate track scanning and records information at high density. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing a track pattern of a magnetic tape according to an embodiment of an information recording method of the present invention.

FIG. 2 is a principal block diagram showing an example of a magnetic recording / reproducing apparatus to which the information recording method of the present invention is applied.

FIG. 3 is a diagram showing a track pattern of a magnetic tape according to an example of a conventional information recording method.

[Explanation of symbols]

 1 magnetic tape 2 data track 3 track group (block) 4 first control track 5 second control track

Claims (3)

[Claims] 1. A magnetic recording device or a magnetic recording / reproducing device is used to provide a plurality of substantially parallel data tracks having a predetermined length in a longitudinal direction of a magnetic tape, and information is sequentially recorded on the plurality of data tracks. In the information recording method, the plurality of data tracks are set as one block, and tracking control is performed during reproduction of these data tracks between the blocks adjacent in the longitudinal direction of the magnetic tape, corresponding to each of the data tracks. An information recording method for recording a first data track reproduction control signal for recording. 2. A magnetic recording device or a magnetic recording / reproducing device is used to provide a plurality of substantially parallel data tracks having a predetermined length in a longitudinal direction of a magnetic tape, and information is sequentially recorded on the plurality of data tracks. In the information recording method, a plurality of blocks are provided in the longitudinal direction of the magnetic tape with the plurality of data tracks as one block, and a data track to be reproduced is changed from a data track of one block of the blocks to a data track of another block. The second data track playback control signal to move to
An information recording method, characterized by recording above and / or below the block. 3. A second data track reproduction control signal for moving a data track to be reproduced from a data track of one block of the blocks to a data track of another block, and / or above the block. The information recording method according to claim 1, wherein the information is recorded below or below.