JPH02183401A - Magnetic tape recording and reproducing device - Google Patents

Abstract

PURPOSE:To realize high recording density and wide band recording by controlling magnetic tape speed by using a multi-track thin film magnetic head having odd number pieces of recording/reproducing thin film transducers. CONSTITUTION:Odd number pieces, namely, 2m + 1 pieces of recording/ reproducing thin film transducers 11 - 15 are arranged on a substrate 16. In such a case, a track interval Ts is made so as to come to equal to a track width dimension Tw or wider than it. By using one of such multi-track thin film magnetic heads 3, 4, recording of 2m + 1 tracks is executed onto a magnetic tape 2. In such a case, 2m + 1 pieces of recording tracks and track interval parts are formed, and an area of (2m + 1) (Ts + Tw) is used as length. Subsequently, a different head of the heads 3, 4 for sliding to the tape 2 executes recording from the track interval part which is not recorded between an (m) + 1-th track and an (m) + 2-th track from the winding side of the tape 2 in a recording area.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multi-track magnetic tape recording and reproducing apparatus that uses a rotary head and, in particular, performs recording and reproducing simultaneously on a plurality of tracks.

Conventional technology Digital VTRs for high-quality TV signals have been actively developed in recent years.
The amount of information handled is 10 times that of a conventional digital VTR for TV signals.
This is more than twice as high, requiring high-speed data transfer of 1.2 Gbl)s. Furthermore, in magnetic recording devices used as external storage devices for computers, there are great demands for increased data transfer speeds for magnetic tape recording and reproducing devices, such as increased storage capacity and correspondingly increased data processing speeds.

In order to increase the data transfer speed, there is a method of increasing the rotational speed or the cylinder diameter to increase the relative speed between the magnetic head and the magnetic tape.

■A method for recording and reproducing multiple tracks at the same time by making the magnetic head multi-track.

etc. have been known for a long time.

However, when the relative speed between the magnetic head and the magnetic tape is greatly increased, there is a drawback that the magnetic head cannot stably slide on the magnetic tape, making it impossible to perform suitable recording and reproduction. moreover,
When the cylinder rotation speed is increased, the wear of the motor bearing becomes extremely large, which significantly reduces the lifespan of the magnetic recording and reproducing device.Increasing the cylinder diameter has the disadvantage of hindering the miniaturization of the magnetic recording and reproducing device. .

For this reason, multi-track recording, in which multiple tracks are simultaneously recorded on a magnetic tape, is the mainstream.

Conventionally, multi-tracking has been achieved by: 1) arranging multiple bulk magnetic heads around the outer periphery of a cylinder; 2) stacking bulk magnetic heads using ferrite cores parallel to the cylinder rotation axis.However, for example, as shown in Figure 10, The conventional bulk type magnetic head 91.
92. 93. There are limitations to stacking four 94's and arranging a large number of them around the outer periphery of the cylinder because it is difficult to align the magnetic head and the tape touch of the magnetic head deteriorates. moreover,
It was also impractical from the point of view of crosstalk. That is, in the case shown in FIG. 10, the opposing area of each bulk type magnetic head is large (if the magnetic heads are placed close together, crosstalk occurs between the magnetic heads. Therefore, the track pitch Tp is set to 600 μm). This had the disadvantage that high-density recording was not possible.Also, due to space restrictions for winding 90, each magnetic head could not be approached, and when four heads were stacked, there was no contact with the magnetic tape. There are 2 moving parts
The problem is that it becomes more than m11+'' and the magnetic head cannot obtain a suitable tape touch.

The purpose of the present invention is to solve the problems of the prior art described above,
It is an object of the present invention to provide a multi-track type magnetic tape recording/reproducing device using a novel rotary head system that is compatible with high recording density and wideband recording, that is, with an increase in data transfer speed.

Means for Solving the Problems In order to achieve the above object, the magnetic tape recording/reproducing device of the present invention includes (2m+1) (m is a positive integer), that is, an odd number of recording/reproducing thin film conversion elements on one substrate. A multi-track thin film magnetic head is used in which the track spacing is approximately equal to or greater than the track width. Turn this into a cylinder (360/n)
Attach them at equal intervals in degrees (n is a positive integer). and means for winding the magnetic tape around the cylinder at an arbitrary angle;
The cylinder is helically scanned, information is simultaneously recorded and reproduced on (2m+1) tracks on the running magnetic tape using any one of the multitrack thin film magnetic heads, and the next (360/n) The track interval between the (m+1)th track and the (m+2)th track from the magnetic tape winding side in the (2m+1) tracks that were recorded and reproduced immediately using a multi-track thin film magnetic head placed at a It is characterized by having a control means for recording and reproducing from (2m+1) tracks.

Function According to the present invention, the recording/reproducing thin film conversion element is mainly composed of a thin film coil and a thin film core having a ring-shaped magnetic path.

An odd number of such thin film conversion elements, ie (2m+1)
(m is a positive integer) are arranged on one substrate. At this time, the track spacing Ts is made to be equal to or greater than the track width dimension Tw. Such a multi-track thin film magnetic head is placed on a plane perpendicular to the cylinder rotation axis at positions where the outer circumferential portion is divided, and recording and reproduction is performed. First, (2m+1) tracks are recorded on a magnetic tape using one of the multi-track thin film magnetic heads described above.

At this time, (2m+1) recording tracks and track spacing parts are formed, and an area with a length of (2m+1)(Ts+Tw) is used. Next, another multi-track thin film magnetic head that slides on the magnetic tape moves to the unrecorded track between the (m+1)th track and the (m+2)th track from the magnetic tape winding side in the recording area. Record from the interval. At this time, the magnetic tape is at a distance L
L=(m+1)Tw+mTs+(Ts-Tw)/2=(
m+ 1/2) (Tw+Ts) It is controlled to advance. This is exactly half the length of the area used by the first multi-track thin film magnetic head. Therefore, the outer circumference of the cylinder is divided into
Using another multi-track thin-film magnetic head placed on a plane perpendicular to the cylinder rotation axis, the magnetic tape is recorded one after another by running the distance (m+1/2) (Tw+Ts) before the next recording. Multi-track recording becomes possible. In addition, in the multi-track thin film magnetic head used in the present invention, the magnetic core constituting the magnetic path is formed of a thin film, so crosstalk is sufficiently low (can be suppressed) even if the recording/reproducing conversion elements are placed close to each other. Since the sliding part with the magnetic tape can be made extremely small, suitable contact with the magnetic tape can be obtained, and high-density recording can be achieved.

Embodiment FIG. 1 shows a schematic view of the cylinder section of the most preferred embodiment of the magnetic tape recording/reproducing apparatus of the present invention.

First, the configuration of this embodiment will be described. That is, in this embodiment, two thin film magnetic heads 3.4 are arranged at intervals of 180 degrees on the outer periphery of the cylinder 1, and the magnetic tape 2 is wound around the cylinder 1 by about 180 degrees. Here, the thin film magnetic heads 3.4 each have a different azimuth angle. 7 indicates the running direction of the magnetic tape 2, and 8 indicates the rotating direction of the cylinder 1.

FIG. 2 is a perspective view of essential parts of the thin film magnetic head 3 or 4. Five recording/reproducing thin film conversion elements 1 on one substrate 16
1, 12, 13, 14, and 15 are thin film magnetic heads with a five-track configuration manufactured so that the track spacing Tp and the track width Tw are approximately equal. In Figure 2, 17a
, 17b, 17c+ 17d, 17e are thin film coils made of copper thin film etc. 18a+
18b+ 18c, 18d, 18e are lower magnetic cores, 19a, 19bl 19c* 19d
l 1θe is the upper magnetic core. Thin film coil 17
a, 17 b, 17 c, 17 d.

17e has magnetic cores 18a and 19a, 18b and 1
9b, 18c and 19c, 18d and 19d and 1
It is placed in a magnetic loop consisting of 8e and 19e.

Since the lower magnetic core and the upper magnetic core are formed of magnetic thin films, even if they are placed close to each other, there is little crosstalk from adjacent tracks and high-density recording can be achieved. 20a
l 20 b, 20 CI 20 d+ 2
0e is the magnetic gap.

Next, the operation of this embodiment will be explained using the track pattern on the magnetic tape shown in FIG. 3 and the system block diagrams shown in FIGS. 4(a) and 4(b).

First, let's talk about what happened during recording. A video signal input from an input terminal 100 is digitized by an A/D converter 101. Next, the recording timing conversion memory 102 performs a temporal arrangement such that the recording signal exists only during the period when the magnetic head is in contact with the magnetic tape. Next, an error correction code addition circuit 103 adds bits for correcting code errors caused by dropouts or the like during reproduction. The recording signal is treated as a block that is a combination of information bits and added error correction bits, and a synchronization addition circuit 104 adds a block synchronization bit indicating the start point of the block. Thereafter, the PCM audio signal input from the input terminal 115 is added by the PCM audio addition circuit 105. Next, the recording signal is divided into five channels by the channel division circuit 106, and each signal is sent to the recording modulators 107a, 107b, 107c,
107 d.

107e and recording equalizers 108a, 108b
.

108c, 108d, and 108e are converted into signals suitable for digital magnetic recording. after that,
Recording amplifiers 109 a, 109 b, 109
The signals amplified by C, 109d, and 109e are supplied to the thin film magnetic head 3 or 4 via a 5-channel rotary transformer 118, and recording on the magnetic tape 2 is performed. At this time, the thin film magnetic head 3 or 4 is switched by the channel switch 110.

The magnetic tape 2 is driven by a capstan drive circuit 112 and a capstan 119, and the cylinder 1 is rotated by a cylinder drive circuit 111.

At this time, the tape is run and the cylinder is rotated by the drive control circuit 113 which receives the reference clock from the reference clock generation circuit 117 and the rotational position signal from the position detection circuit 114 made up of a Hall element etc. installed in the cylinder. The timing and the like of the channel switch 110 are controlled as described below.

First, a recording track 21 al 2 l b+ 21 CI is recorded on the magnetic tape by the thin film magnetic head 3.
216r 21 e is formed. When the thin film magnetic head 3 finishes recording, the thin film magnetic head 4 starts recording next. At this time, the magnetic tape 2 has a distance (Tw
+TI)+Tw+TI)+Tw=5Tw),
Recording is performed from the track gap between the third track and the fourth track, and the recording track 22a is recorded.

22 b, 22 c, 22 d, 22 e
is controlled so that it is recorded. When the thin film magnetic head 4 finishes recording, the thin film magnetic head 3 starts recording again. At this time, the magnetic tape 2 is placed at a distance of 5T as before.
Traveling w, recording tracks 23a, 23b, 23 cm
23 cL 23 e. By repeating these steps one after another, recording tracks are continuously formed on the magnetic tape without interruption. Next, the reproduction operation will be described with reference to FIG. 4(b).

First, the signal reproduced by the thin film magnetic head 3 or 4 is
Channel rotary transformer 118a or 11
8b is switched by the channel switch 120 to regenerative amplifiers 121a and 121b.

121c, 121d, and 121e. At this time, using the servo signal in the reproduction signal detected by the servo signal detection circuit 116 and the rotational position signal from the position detection circuit 114, the drive control circuit 113 causes the magnetic head to accurately scan and reproduce the recording track on the magnetic tape. controlled to do so. The playback and timing of channel switch 120 is controlled. The reproduced signals are transmitted to reproduction equalizers 123a, 123b, 12
3 c, 123 d, 123e1111 unit 1
23 a, 123 b, 123 c, 12
3d, 123el time axis correction memory 124, error correction circuit 125, reproduction timing conversion memory 12B,
The PCM audio separation circuit 127, the synchronous blanking addition circuit 128, and the D/A converter 128 convert the signal into the original video signal and audio signal, and output terminals 130 and 140.
is output from.

In this embodiment, since adjacent thin film magnetic heads arranged in a cylinder have different azimuth angles, recording without guard bands can be realized.

In addition, a configuration in which all the thin film magnetic heads disposed in the cylinder have the same azimuth angle is also possible. At this time, taking crosstalk from adjacent tracks into consideration, the track interval Ts of the recording/reproducing changer is set to be greater than the track width Tw to obtain a track pattern as shown in FIG. In other words, Gart-Band 4 has nothing recorded between the recording tracks.
0 is formed.

FIG. 6 shows a second embodiment. Components that are the same as those shown in FIG. 1 are given the same numbers. In the second embodiment, four thin film magnetic heads 3. 4. 5.
60 are arranged at every 90 degrees around the outer circumference of the cylinder 1, and the magnetic tape 2 is wound around the cylinder 1 about 180 degrees. Here, the thin film magnetic heads 3.5 and 2.6 have different azimuth angles.

Next, the operation in this case will be explained using the track pattern on the magnetic tape shown in FIG.

Now, when recording is performed by the thin film magnetic head 3 disposed on the outer periphery of the cylinder, a recording track 51 al 51 bs 51 C151cL51 is created on the magnetic tape.
e is formed. When the recording by the thin film magnetic head 3 reaches approximately half of the recording period, recording by the thin film magnetic head 4 starts next. At this time, the magnetic tape 2 is at a distance j! !
(Tw+Tp+Tw+TI)+Tw=5Tw), recording is performed from the track gap between the third track and the fourth track, and recording tracks 52a, 52 are recorded.
bs 52c, 52d.

It is controlled by the drive control circuit so that it is recorded in 52e. At this time, two thin film magnetic heads 3 are placed on the magnetic tape.
．． 4 is sliding, and simultaneous recording is performed on 10 tracks. When recording by the thin film magnetic head 4 reaches approximately half of its recording period, recording by the thin film magnetic head 5 begins. At this time, the magnetic tape 2 has a distance of i! as before. It is controlled so that it travels for 15 Tw and records for 5 tracks.

At this time as well, two thin film magnetic heads 4.5 are sliding on the magnetic tape, and 10 tracks are simultaneously recorded. By repeating these steps one after another, recording tracks are continuously formed on the magnetic tape without interruption, and ten tracks are simultaneously recorded. Similarly, reproduction can be performed by scanning recording tracks on the magnetic tape with a thin film magnetic head.

FIG. 8 shows a third embodiment. Components that are the same as those shown in FIG. 1 are given the same numbers. In the third embodiment, four thin film magnetic heads 3. 4. 5.
6 are arranged at every 90 degrees around the outer periphery of the cylinder 1, and the magnetic tape 2 is wound around the cylinder 1 by about 270 degrees. Here, the thin film magnetic heads 3, 5 and 2.6 have different azimuth angles.Next, the operation in this case will be explained using the track pattern on the magnetic tape shown in FIG.

Now, when recording is performed by the thin film magnetic head 3 disposed on the outer periphery of the cylinder, recording tracks 61 al 6 l b, 61 c, 81 are formed on the magnetic tape.
d.

61e is formed. When the recording by the thin film magnetic head 3 reaches approximately 1/3 of the total recording period, recording by the thin film magnetic head 4 starts next.

At this time, the magnetic tape 2 has a distance (Tw+T p+Tw+
TI)+Tw=5Tw), and then the 3rd and 4th track.
Recording is performed from the track interval between the track number and the recording track 62a, 62b+82c.

It is controlled using a control circuit so that it is recorded in 62d and 62e. Furthermore, when the next 1/3 of the recording period is reached, recording by the next thin film magnetic head 5 begins. At this time, the magnetic tape 2 similarly has a distance of 11iI (Tw+Tri+
Tw+TI)+Tw=5Tw), and recording is performed from the track interval between the third and fourth tracks of the five tracks recorded by the thin film magnetic head 3, and the recording track 83 al 83 b + 63
It is controlled to be recorded in CI 83 d, 63 e. At this time, three thin film magnetic heads 3 are placed on the magnetic tape.
．． 4. 5 is sliding. By repeating these steps one after another, recording tracks are continuously formed on the magnetic tape without interruption, and 15 tracks are simultaneously recorded. Similarly, reproduction can be performed by scanning recording tracks on the magnetic tape with a thin film magnetic head.

2. shown in FIGS. 5 and 8. Also in the case of the third embodiment,
As in the embodiment shown in FIG. 1, a thin film magnetic head is used in which all the azimuth angles are the same and the track spacing Ts of the recording/reproducing thin film transducer is formed to be greater than the track width Tw. It is also possible to record with a guard band that is not recorded.

It is clear that the magnetic tape recording/reproducing apparatus of the present invention is not limited to the embodiments described above. In principle, a thin film magnetic head having an odd number of recording/reproducing thin film transducers is arranged at equally divided positions on the outer periphery of a cylinder, a magnetic tape is wound around the cylinder, and the cylinder rotation speed and magnetic tape running speed are controlled. This can be achieved by

In addition, when configuring the number of recording/reproducing thin film converters to be 3 or more and 11 or less to simultaneously record 10 to 14 tracks and record a high-quality TV digital signal with a transfer rate of approximately 1.2 Gbps, one thin film converter element is used. The signal band handled by is 20MHz ~
It becomes 70MHz, which can be converted to an easy-to-handle band. Further, since the magnetic tape sliding portion of the thin film magnetic head can be formed extremely finely, stable tape touch of the magnetic head can be obtained, and there is an advantage that good recording and reproduction can be performed.

Effects of the Invention As described above, according to the magnetic tape recording/reproducing apparatus of the present invention, (2m+1) recording/reproducing thin film conversion elements (m is a positive integer) are arranged on one substrate, each with a track spacing dimension. n multi-track thin-film magnetic heads formed to have a width substantially equal to or larger than the track width are arranged at equal intervals on the outer circumference of the cylinder at every (360/n) degree (n is a positive integer); A magnetic tape is wound around the cylinder, the cylinder is helically scanned, and information is simultaneously recorded and reproduced on (2m+i) tracks on the running magnetic tape using any one of the multi-track thin film magnetic heads. , using a multi-track thin film magnetic head placed at the next (360/n) degree position, the (m+1)th track and ( By controlling recording and reproduction of (2m+1) tracks from the track interval between m+2)th tracks, the head can be mounted on a single plane perpendicular to the cylinder rotation axis without adjusting the height. It becomes possible to easily form (2m+1) recording tracks continuously without interruption on a magnetic tape using a thin film magnetic head. In addition, since the lower magnetic core and upper magnetic core of the recording/reproducing thin film converter are made of magnetic thin film, there is little crosstalk from adjacent tracks even when they are placed close to each other, making it possible to realize high-density multi-track recording. It has an effect.

Therefore, a high-definition TV with a transfer rate of approximately 1.2 Gbps
The digital signal is multi-recorded on 9 to 21 tracks by the magnetic tape recording/reproducing device of the present invention, and the signal band is 28M.
Recording and reproduction can be performed by converting into a relatively easy-to-handle band of Hz to 70 MHz.

Furthermore, since the magnetic tape sliding portion of the thin-film magnetic head can be formed extremely finely and stable tape touch of the magnetic head can be obtained, there is an effect that good recording and reproduction can be performed.

Furthermore, since there is no need to increase the relative speed between the magnetic tape and the magnetic head by increasing the cylinder diameter or cylinder rotational speed, it also has the effect that reliability of the device can be improved and the device can be easily miniaturized.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a cylinder section of a magnetic tape recording/reproducing apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a schematic diagram of a thin film magnetic head with a 5-track configuration mounted on a magnetic tape recording/reproducing apparatus according to a preferred embodiment. FIG. 3 is a perspective view of a main part of a magnetic recording/reproducing transducer according to a preferred embodiment of the present invention. Track pattern diagram, FIG. 6 is a schematic diagram of a cylinder section of a magnetic tape recording/reproducing apparatus according to a second embodiment of the present invention, and FIG. 7 is a track pattern diagram on a magnetic tape in a magnetic tape recording/reproducing apparatus according to a second embodiment of the present invention. Pattern diagram, FIG. 8 is a schematic diagram of a cylinder section of a magnetic tape recording/reproducing apparatus according to a third embodiment of the present invention, and FIG. 9 is a track pattern on a magnetic tape in a magnetic tape recording/reproducing apparatus according to a third embodiment of the present invention. FIG. 10 is a perspective view of four conventional bulk magnetic heads stacked one on top of the other. 1...Cylinder, 2...Magnetic tape, 3, 4
．． 5. 8-...Multi-track thin film magnetic head, 7
...Magnetic tape running direction, 8...Cylinder rotation direction, 10a, 10b-...Tape guide, 1
1.12. 13,14. 15... Recording/reproducing thin film converter, te-... Substrate, 17 a, 17
be 17 Cs17 d, 17 e = thin film coil, 18at 18b+188m 18 d
, 18 e”・lower magnetic core, 19 al 19
bt 19 C119cL 19 e - Upper magnetic core% 20a+ 20by 20c,
2oa. 20e...Magnetic gap. Name of agent: Patent attorney Shigetaka Awano Haka 1 person ii 2
Figure 1 - Series 5 Wealth Diagram Collection■ Figure

Claims (9)

[Claims] (1) A multilayer device in which (2m+1) recording/reproducing thin film conversion elements (m is a positive integer) are formed on one substrate so that the track interval dimension of each is approximately equal to or larger than the track width dimension. means for winding the magnetic tape around the cylinder at an arbitrary angle, comprising n track thin film magnetic heads mounted on the outer periphery of the cylinder at equal intervals of (360/n) degrees (n is a positive integer); The above cylinder is helically scanned, and any one of the above multi-track thin film magnetic heads is used to place the magnetic tape on the running magnetic tape (
Information is simultaneously recorded and reproduced on 2m+1) tracks, and a multi-track thin film magnetic head placed at the next (360/n) degree position is used to record and reproduce information on previously recorded and reproduced (
It is characterized by having a control means for recording and reproducing (2m+1) tracks from a track interval between the (m+1)th track and the (m+2)th track from the magnetic tape winding side of the 2m+1) tracks. Magnetic tape recording and reproducing device. (2) (2m+1) pieces (m is a positive integer) of recording/reproducing thin film conversion elements formed on one substrate so that each track interval dimension is equal to or larger than the track width dimension, and the same type of azimuth angle is formed. 2. The magnetic tape according to claim 1, wherein n multi-track thin film magnetic heads are provided on the outer periphery of the cylinder so as to be mounted at equal intervals of (360/n) degrees (n is a positive integer). Recording and playback device. (3) (2m+1) recording/reproducing thin film conversion elements (m is a positive integer) are formed on one substrate so that the track interval dimension of each is almost equal to the track width dimension, and the azimuth angle is different. Two types of multi-track thin film magnetic heads are mounted on the outer circumference of the cylinder at (360/n) degrees (n is a positive integer).
2. The magnetic tape recording and reproducing apparatus according to claim 1, wherein n magnetic tape recording and reproducing apparatuses are provided, one each being attached alternately to each other. (4) (2m+1) (m is a positive integer) recording/reproducing thin film conversion elements are formed on one substrate so that the track interval dimension of each is approximately equal to or larger than the track width dimension; n pieces of multi-track thin film magnetic heads with different or the same azimuth angle are installed on the outer periphery of the cylinder at equal intervals every (360/n) degrees (n is a positive integer), and a magnetic tape is attached to the cylinder. The cylinder is helically scanned and information is simultaneously recorded and reproduced on (2 m + 1) tracks on the running magnetic tape using any one of the multi-track thin film magnetic heads. , the next (360/360/
The multi-track thin film magnetic head placed at the n) degree position begins to slide on the magnetic tape, and the previously recorded/played (2)
It is characterized by having a control means for simultaneously recording and reproducing (2m+1) tracks from the track interval between the (m+1)th track and the (m+2)th track from the magnetic tape winding side among the m+1) tracks. A magnetic tape recording and reproducing device. (5) (2m+1) (m is a positive integer) recording/reproducing thin film conversion elements are formed on one substrate so that the track interval dimension of each is approximately equal to or larger than the track width dimension; Multi-track thin-film magnetic heads with different or the same azimuth angle on the outer circumference of the cylinder (360/n)
means for winding the magnetic tape at an arbitrary angle around the cylinder; Using any one of the above multi-track thin film magnetic heads on the tape (2m+
1) Information is simultaneously recorded and reproduced on a book track, and a multi-track thin film magnetic head placed at the next (360/n) degree position slides on the magnetic tape from the middle point of the recording/reproduction period on the track. At the beginning, recording and playback is performed on (2m+1) tracks from the track interval between the (m+1)th track and the (m+2)th track from the magnetic tape winding side of the (2m+1) tracks that were previously recorded and played back. and repeat this process to obtain k×(2
1. A magnetic tape recording and reproducing apparatus comprising: a control means for simultaneously recording and reproducing m+1) tracks (k is an integer of 2 or more). (6) Form (2m+1) recording/reproducing thin film conversion elements (m is an integer of 2 to 5) on one substrate so that the track interval dimension of each is approximately equal to or larger than the track width dimension. A multi-track thin film magnetic head with different or the same azimuth angle is attached to the outer circumference of the cylinder (36
0/n) degrees (n is an integer from 1 to 4), n pieces are provided so as to be installed at equal intervals, a means for winding the magnetic tape around the cylinder at an arbitrary angle, and a means for helically scanning the cylinder; Using any one of the above multi-track thin film magnetic heads on a running magnetic tape (
Information is simultaneously recorded and reproduced on 2m+1) tracks, and from the end of the recording and reproduction period on the said tracks, a multi-track thin film magnetic head placed at the next (360/n) degree position slides on the magnetic tape. At the beginning, recording and playback is performed on (2m+1) tracks from the track interval between the (m+1)th track and the (m+2)th track from the magnetic tape winding side of the (2m+1) tracks that were previously recorded and played back. and repeat this, (2
m+1) A magnetic tape recording and reproducing apparatus characterized by having a control means for simultaneously recording and reproducing tracks. (7) (2m+1) recording/reproducing thin-film conversion elements (m is an integer of 2 to 5) formed on one substrate, each with a track interval dimension approximately equal to the track width dimension, with different azimuth angles. Two or four multi-track thin film magnetic heads of two types are installed on the outer circumference of the cylinder, one at every 180 degrees or 90 degrees, and the magnetic tape is wound around the cylinder at 360 degrees or 180 degrees. 7. The magnetic tape recording and reproducing apparatus according to claim 6, further comprising means for recording and reproducing magnetic tape. (8) (2m+1) (m is 2 or 3) recording/reproducing thin film conversion elements are formed on one substrate so that the track interval dimension of each is approximately equal to or larger than the track width dimension; Two or four multi-track thin film magnetic heads with different or the same azimuth angle are installed on the outer periphery of the cylinder at equal intervals of 180 degrees or 90 degrees, and the magnetic tape is attached to the cylinder at 360 degrees or 180 degrees. The cylinder is helically scanned, and any one of the multi-track thin film magnetic heads is used to place the magnetic tape on the running magnetic tape (2m+
1) Information is simultaneously recorded and reproduced on a book track, and from approximately 1/2 of the recording/reproduction period on the track, a multi-track thin-film magnetic head placed at the next 180 degree or 90 degree position records information on the magnetic tape. began to slide,
The (m+1)th track from the magnetic tape winding side of the previously recorded (2m+1) tracks and the (m+1)th track from the magnetic tape winding side.
2) From the track spacing between the th tracks (2m+1)
1. A magnetic tape recording and reproducing apparatus characterized by having a control means for recording and reproducing on and from tracks of a book and simultaneously recording and reproducing on 10 or 14 tracks. (9) A multilayer device in which (2m+1) (m is 1 or 2) recording/reproducing thin film conversion elements are formed on one substrate so that the track interval dimension of each is approximately equal to or larger than the track width dimension. Track thin-film magnetic heads are mounted on the outer circumference of the cylinder at equal intervals every 90 degrees.
means for winding the magnetic tape around the cylinder at 270 degrees; and a means for helically scanning the cylinder to form (2m+1) tracks on the running magnetic tape using any one of the multi-track thin film magnetic heads. Information is simultaneously recorded and reproduced on the track, and from about 1/3 of the recording/reproduction period for the track, the multi-track thin film magnetic head placed at the next 90 degree position begins to slide on the magnetic tape, and the previously recorded Recording and reproduction are performed on (2m+1) tracks from the track interval between the (m+1)th track and the (m+2)th track from the magnetic tape winding side of the (2m+1) reproduced tracks, and this is repeated. , 9 or 15 tracks simultaneously.