JPH0242618A - Storage reproducing device - Google Patents

Abstract

PURPOSE:To deal with two kinds of systems by means of one kind of systems by providing an auxiliary magnetic head having an inverse azimuth in the vicinity of the magnetic head of one side among magnetic heads having the same azimuth. CONSTITUTION:An angle made by a magnetic head Hc and an auxiliary magnetic head He with a center O of a rotary head device 10 is a micro angle theta, the rotating direction of the rotary head device 10 is made into a counterclockwise direction, and a timing, by which the magnetic head He is scanned to the track of a magnetic tape 2, is slightly delayed by the degree of the micro angle theta from the magnetic head Hc. In order to offset the delay, a fitting position in a shaft direction to the rotary head device 10 of the magnetic head He is dislocated downward from the magnetic head Hc, and the auxiliary magnetic head He can surely scan the same track as the magnetic head Hc. Thus, respective kinds of formats can be shared with the same device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a storage/reproduction device, and more particularly to a storage/reproduction device in which various formats can be shared by the same storage/reproduction device.

[Prior Art] As a digital storage and playback device, a DAT (Digital Audio Tap) uses a rotating head device to record and play back digital signals on a magnetic tape.
By the way, more and more systems are being built using this magnetic tape (DAT tape) as a memory device for microcomputers. In terms of information processing speed, the above memory devices include a system (hereinafter referred to as System 1) that has the information processing speed of a normal magnetic tape (DAT tape), and a system (hereinafter referred to as System 1) that has a faster information processing speed (hereinafter referred to as System 2). )Is required.

Recording on the magnetic tape used in system I will be explained with reference to FIGS. 3 to 5.

FIG. 3 is a plan view showing the tape running system of a rotating head type storage/reproduction device used as System 1 or DAT;
4A is a signal waveform diagram of data recorded by the magnetic head Ha of FIG. 3, and FIG. 4B is a signal waveform diagram of data recorded by the 6f1 magnetic head Hb of FIG. 3.

In FIG. 3, reference numeral 1 indicates a rotary head device, and the rotary head device 1 is equipped with magnetic heads Ha and Hb. As shown in the figure, a magnetic tape 2 is brought into contact with the rotary head device 1 at a 90° winding angle. Reference numeral 3 indicates a cassette half. The tape reel 4 on the supply side in the cassette half 3 is installed on a reel stand 5, and the tape reel 6 on the winding side is installed on a reel stand 7.

The magnetic tape 2 is pulled out from inside the cassette half 3 by guide rollers 8a, 8b and loading posts 9a, 9b, and is wound around the rotary head device 1 at an angle of 90°.

In the recording mode, the guide roller 8a.

8b, and the pinch roller 10 moves together with the loading posts 9a and 9b, and the magnetic tape 2 is brought into pressure contact with the capstan 11 by the pinch roller 10. and,
The magnetic tape 2 is run at, for example, 8.150 mm/sec (the tape running speed in a normal DAT) by the rotation of the capstan 11. Further, the one-rotation head device 1 is rotated at 200 rpm. In this state, for example, the magnetic head Ha is brought into contact with the position 16a of the track 16 shown in FIG. 5 (SO in FIG. 4A), and the magnetic head Ha scans the track 16 along the direction a.

As a result, data for one track (see TI in FIG. 4A) is written, and as shown in FIG. 5, data such as the subcode SUB, servo ATF, audio PCM, etc. are recorded diagonally. This one track worth of data is written by moving the magnetic head Ha located at the starting point A in FIG. 3 to the ending point B.

That is, one track's worth of information is written within a period in which the magnetic head Ha is rotated by 90 degrees.

Note that when the magnetic head Ha is located at the starting point A, the first signal SO of the signal waveform T1 shown in FIG. 4A is
is written, and when the magnetic head Hb reaches the end point B, the final signal Sl is written.

The magnetic head Ha reaches the end point B, and marks M1 in FIG. 4B.
During the phase angle period of 90°, the magnetic heads Ha and Hb do not come into contact with the magnetic tape 2, making it impossible to write data. After the 6n magnetic head Ha reaches the end point B, when the rotary head device 1 is rotated 90 degrees, the magnetic head Hb reaches the start point A (the position where the signal S2 in FIG. 4B can be written). The state becomes ready for data writing, and the magnetic head Hb reaches the scanning start point 17a of the track 17 shown in FIG. That is, after the magnetic head Ha contacts the write start point 16a of the track 16, the rotary head device 1 is rotated 180 degrees, and the magnetic head Hb contacts the write start point 17a of the track 17 (signal S in FIG. 4B).
2 reaches a writable position).

That is, when data is written by a storage/reproduction device having a rotary head device in which a pair of magnetic heads are provided facing each other at 180 degrees, as shown in FIGS. 4A to 4B, writing by the magnetic head Ha is considered effective. mode MO, m
Ki head Ha.

Mode Ml, where none of Hb is writeable!
This is done by switching the mode M2 in which the writing of the head Hb is enabled every 90° rotation of the rotary head device I.

Next, recording on the magnetic tape used in system 2 will be explained.

Note that FIGS. 7A to 7D show the magnetic head Ha-
FIG. 3 is a signal waveform diagram recorded by Hd.

Here, consider a system 2 that has twice the information processing speed of system 1, for example. In this case, the magnetic tape recorded for system 2 is 4 as shown in FIG.
This is done by a rotary head device equipped with two heads Ha-Hd. The winding angle of the magnetic tape around the rotary head device is 90° as in the case of System I. Further, magnetic heads Ha-Hd are attached to the outer periphery of the rotary head device so as to be spaced apart from each other by 90°. The magnetic heads Ha and Hc have the same azimuth angle, and the magnetic heads Hb and Hd have the same azimuth angle. The azimuth angles of the magnetic heads Ha and Hc and the magnetic heads Hb and Hd are opposite to each other. This makes it possible to record data in adjacent tracks at opposite azimuth angles.

In the recording mode, Ha indicates the timing at which the magnetic head becomes capable of writing using a rotary head device equipped with four heads as shown in FIG.

Scanning switched in the order of Hb, Hc, Hd at 200Orpm
(same rotation speed as system 1), while the tape running speed was 16.300 mm/2, which is twice that of system 1.
sec and writes to the magnetic tape. In this case, for example, when the magnetic head Ha reaches the position 16a of the track 16 shown in FIG.
Scan 6. As a result, data for track 1 is written. In this case, since the running speed of the magnetic tape is twice that of system 1, the rotary head device is rotated by 90 degrees, so that 16a
The magnetic head Ha located at 17b (position where signal SO in Figure 7A is writable) scans the magnetic tape in direction a, and when scanning is completed, 17b (position where signal S1 in Figure 7B is writable). The magnetic head Hb comes to reach. From then on, every time the rotary head device is rotated 90@, the magnetic head Hc moves to the position 18a (the position where the signal s2 in Fig. 7C can be written), and the magnetic head Hd moves to the position 19a (the signal S4 in Fig. 7D can write). possible locations).

The magnetic tape 2 for system 2, which is recorded by four magnetic heads at twice the running speed of the magnetic tape (the rotational speed of the rotary head device 1 is the same), has a higher transfer speed than that of system I. The rate will be doubled. That is, there is no mode Ml in which data is not recorded as in system I, and recording is performed by continuously switching modes M2 to M5 in which recording is performed by the magnetic head HaxHd.

Therefore, by doubling the running speed of the magnetic tape during playback compared to system 1.

Data playback speed can be doubled.

Note that the tape format itself (track pitch, track length, etc.) is almost the same.

[Problem to be Solved by the Invention 1] As described above, the magnetic tapes for System 1 and System 2 have the same tape format, and only the recorded contents are different. Therefore, it is convenient to provide a circuit that can process information for both systems, and to perform storage and playback for both systems using the same device.

Here, the data recorded by the storage/reproduction device having two heads as shown in FIG.
Consider reading by a rotary head device (device for recording and reproducing magnetic tape for system 2) having two magnetic heads. In this case, for example, it is conceivable to use a magnetic head Ha and a magnetic head Hc opposed to the magnetic head Ha at an angle of 180 degrees. In this case, the condition is that the running speed of the magnetic tape be 8.150 mm/sec (the running speed of the magnetic tape when data is recorded on the magnetic tape by two heads). In fact, if you do this,
The magnetic heads Ha and Hc scan the format of the magnetic tape recorded by the two heads. However, since the magnetic heads Ha and Hc have the same azimuth angle, it is not possible to read data recorded alternately at opposite azimuth angles as shown in FIG.

Furthermore, the rotary head device shown in FIG. 6 is equipped with a 180
By the magnetic heads Ha and Hc facing each other at an angle of
Even if magnetic recording is attempted for system 1, since these have the same azimuth angle, there is a problem in that adjacent tracks as shown in FIG. 5 cannot be recorded at opposite azimuth angles.

The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to enable various formats to be shared by the same storage/reproduction device.

[Means for Solving the Problems 1] The present invention is a storage/reproducing device using a rotary head device equipped with a magnetic head and rotationally driven by a motor, the rotary head device having a magnetic head at an angle of 180 degrees. A plurality of pairs of magnetic heads are mounted, each having the same azimuth angle, and a small number of auxiliary magnetic heads (near each of the magnetic heads, each having an azimuth angle opposite to that of the magnetic head) are mounted. This is a storage/reproduction device provided with a head.

Further, in the above device, it is preferable that the auxiliary magnetic head is arranged at a position shifted in the axial direction of the rotary head device from the other magnetic heads.

[Operation] The above-mentioned means, in a magnetic storage/reproduction device, provides an auxiliary device having an opposite azimuth angle near one of the magnetic heads having the same azimuth angle provided in a rotating head device constituting the device. A 6f1 air head is provided. Therefore, by using one of the pair of magnetic heads and the auxiliary magnetic head, it is possible to configure a recording or reproducing system similar to an apparatus having two 6 fl air heads with opposite azimuths arranged at a pitch of approximately 180 degrees. Therefore, it is possible to use the storage/reproduction device using the above means in common with a recording system using a device having two magnetic heads, and it becomes possible to use one type of device to support two types of systems.

Furthermore, in the above-mentioned means, it is possible to correct the positional deviation of the auxiliary magnetic head in the rotational direction by shifting the auxiliary magnetic head with respect to the other magnetic heads in the axial direction of the rotary head device, and the auxiliary magnetic head Tape tracks can be scanned reliably.

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a tape running system of a storage/reproduction device according to an embodiment of the present invention, and FIG. 2 is a diagram schematically showing the mounting position of a magnetic head.

In FIG. 1, reference numeral 10 indicates a rotary head device. The rotating head device 10 has magnetic heads H at intervals of 906.
A-Hd is provided, and data can be recorded and reproduced using these four heads. The arrangement and azimuth angle of the magnetic head HaxHd are 6th.
It is similar to that shown in the figure. However, in this embodiment, an auxiliary magnetic head He having an azimuth angle opposite to that of the 6R magnetic head He is provided near the 6R magnetic head Hc.

The angle that the 6n magnetic head Hc and the auxiliary magnetic head He form with the center 0 of the rotary head device 10 is a small angle θ.

The rotating direction of the rotary head device 10 is 1 counterclockwise, so that the timing at which the magnetic head He scans the tracks of the magnetic tape 2 is slightly delayed by a minute angle of 0 minutes from the scanning head He. ing. Therefore, in order to offset this delay, as shown in FIG. 2, the mounting position of the magnetic head He in the axial direction relative to the rotary head device IO is shifted downward by Δy from the position of the magnetic head Hc. By rotating the rotary head device 10 by 180°, the tape 2
moves forward by one track pitch, so the magnetic head He moves forward by one track pitch.
The value of Δy when shifted by θ from c is track pitch×θ/180. By satisfying this requirement, the auxiliary magnetic head He can reliably scan the same track as the magnetic head Hc.

Next, the operation of the present invention will be explained.

First, a case will be described in which data (for system 1) written on a magnetic tape is reproduced by a normal DAT (the storage/reproduction device of this embodiment is a separate device and is shown in FIG. 3).

In this system 1, data is sequentially and alternately recorded in track 16 shown in FIG. 5 by magnetic head Ha shown in FIG. 3, and in track 17 by magnetic head E (b). Furthermore, in system 1, adjacent tracks 16 and 17 are recorded at opposite azimuth angles by the device shown in FIG.
When playing back a tape recorded by
Reproduction is performed by a magnetic head Ha and an auxiliary magnetic head He having an opposite azimuth angle. In this case, in the apparatus shown in FIG.
0Orpm, magnetic tape 2 running speed 8.150m
Regeneration is performed at m/sec. During reproduction, the magnetic head Ha is brought to the data recording start point 16a of the track 16 by a control means operated based on a control signal (not shown). The magnetic head Ha is scanned in the direction a, and when the zero-rotation head device 1O, which sequentially reproduces data recorded in the track 16, is rotated 180 degrees, the magnetic head Hc reaches the position 17a. Thereafter, the auxiliary magnetic head He reaches the position 17a with a delay of θ, and the data recorded on the track 17 can be reproduced. Note that data loss due to this delay is not a practical problem because the format has a margin.When precision data reproduction is required, such as with image information, the tape should be wound at an angle of (90 degrees). By setting 〇), it becomes possible to correct the scanning delay caused by the auxiliary magnetic head He.

Alternatively, the positional deviation of the auxiliary magnetic head θ can be corrected by shifting the reproduced signal of the magnetic head Ha by an amount of θ using a time axis correction device.

Furthermore, if the auxiliary magnetic head He is attached to the rotary head device IO at the same height as the magnetic head Hc, the magnetic head He will not scan over the track 17. However, since the auxiliary magnetic head He is mounted so as to be shifted downward by track pitch x θ/180 from the magnetic head He, the magnetic head He scans the track 17 accurately.

As described above, the track in which the data recorded at the azimuth angle corresponding to this is written by the magnetic head Ha is recorded at the corresponding azimuth angle by the magnetic head He having an azimuth angle opposite to that of the magnetic head Ha. By alternately scanning the tracks in which data recorded in the system 1 has been written, it becomes possible to reproduce the system 1 data written by the same device as a normal DAT.

Next, when data for system 2 recorded by four heads by the storage/reproduction device of this embodiment shown in FIG. are magnetic heads Ha, Hb
It is made by four heads: , Hc, and Hd.
In this case, the tape running speed is twice that of system 1 (however, the rotational speed of rotary head device 1 is 2000 rpm, which is the same as system 1) for reproduction.

Next, a recording operation by the storage/reproduction apparatus of this embodiment shown in FIG. 1 will be explained.

First, for recording on the Efi tape for system 1, the running speed of the tape was set to 8.150 mm/sec, the rotation speed of the rotary head device was set to 200 rpm, and the magnetic head
, He performs recording. In this case, for example, the magnetic head Ha is brought to the position 16a by a control means (not shown) operated based on the control signal, and recording is started. After the recording on the track 16 is completed, the magnetic head He is brought onto the track 17. In this case, the magnetic head He is the magnetic head H
It does not face 180° to a, and runs behind by a minute angle of 0 minutes. Therefore, some data corresponding to this delay will be lost.

The data recorded in the above manner can be reproduced using the magnetic disks Ha and He while keeping the running speed of the magnetic tape the same as during recording. During reproduction, the magnetic head Ha is brought to the position 16a by a control means (not shown). Next, the magnetic head H
After c reaches the position 17a, the magnetic head He is brought to the position 17a after a minute delay of 0 minutes, and the data recorded on the track 17 is reproduced.

Recording on the magnetic tape for system 2 by the storage/reproduction device of this embodiment is performed using magnetic heads Ha, Hb, and Hc.

This is done using four HD heads. In this case, the running speed of the 6n air tape is twice that of system I (16,30
0mm/5ec), the number of rotations of the rotating head device is 200
Orpm. Here, for example, the magnetic head [(a) is brought to the position 16a by a control means (not shown). Thereafter, the phase is shifted by 90 degrees from the scanning of the magnetic head Ha, and the magnetic head Hb reaches the position 17a. The magnetic head is rotated as the rotary head device 10 rotates.
Data is recorded at an azimuth angle opposite to that recorded on track 16. Thereafter, data with an azimuth opposite to that of the track 17 is recorded on the track 18 by the magnetic head Hc with a phase shift of 90°. The scanning of the magnetic head He causes the magnetic head Hd to record data in the tracks 1-9 with an azimuth opposite to that of the data in the track 18 with a phase delay of 90 degrees.

As described above, by scanning a predetermined track with a magnetic head having an azimuth angle that changes sequentially for each 90° rotation of the rotary head device l, azimuth recording without gaps between tracks is performed. Reproduction of data recorded on the tape is carried out by controlling the magnetic heads Ha, Hb, Hc, and Hd so that they sequentially reach a predetermined track position while keeping the rotating head and the tape traveling at the same speed as during recording. Ru.

Although the invention made by the present inventor has been specifically explained based on Examples above, the present Examples are not limited to the above-mentioned Examples.

For example, this is effective when dubbing is performed using a double cassette deck. That is, by reproducing data written in the system 1 format in the system 2 mode, the reproduction speed is doubled, and by recording this, the dubbing speed can be doubled.

Furthermore, in the dubbing described above, by increasing the rotational speed of the rotary head device from 200 rpm to 300 rpm and increasing the tape running speed to 1.5 times that of system 2, the dubbing speed can be increased to three times the normal speed. .

Furthermore, in the above embodiment, the scanning of the magnetic head He is made to be slower than that of the magnetic head Hc by 00 minutes;
The mounting position of the magnetic head He may be shifted upward by track pitch x θ/180 so that the speed is increased by θ°.

Thus, the present invention allows the use of multiple systems with a common device. Therefore, as in the above embodiment, by connecting processing circuits for system I and system 2 to the apparatus of the present invention, separate system recording and playback becomes possible. Or DAT and new format VTR
It also becomes possible to use them in common devices.

〔Effect of the invention〕

As described above, according to the present invention, in a magnetic storage reproducing device, an opposite azimuth angle is provided near one of the magnetic heads having the same azimuth angle provided in the rotary head device constituting the device. An auxiliary 6n air head is provided. Therefore, azimuth recording and reproduction of the recorded data can be performed by a newly provided magnetic head having an azimuth angle opposite to that of the one magnetic head. Therefore, both formats that are recorded and reproduced without involvement of the newly provided magnetic head with the opposite azimuth angle and formats that are recorded and reproduced with involvement of the newly provided magnetic head have been changed.
The effect is that playback is also possible.

Furthermore, according to the present invention, in the above storage/reproduction device,
From one magnetic head, for example, track pitch x θ/1
A magnetic head having an opposite azimuth angle is provided, shifted by a height of 80°. Therefore, it is possible to bring the magnetic head having the opposite azimuth angle (l pitch shifted) to the track accurately.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the tape running system of the storage/reproduction device of the present invention, Fig. 2 is a diagram for explaining the mounting position of the magnetic head, and Fig. 3 is a tape view of a conventional two-head storage/reproduction device. A plan view of the traveling system, Fig. 4A is a waveform diagram of the signal recorded (reproduced) by the magnetic head Ha, Fig. 4B is a waveform diagram of the signal recorded (reproduced) by the magnetic head Hb, and Fig. 5 is the magnetic tape. 6 is a diagram explaining the arrangement of magnetic heads installed in a conventional four-head type rotary head device, and FIGS. 7A to 7D are enlarged views showing the recording format of magnetic heads Ha-Hd. FIG. 3 is a (regenerated) signal waveform diagram. 10... Rotating head device, 16 to 19 tracks, Ha
=Hd...Magnetic head, He...Auxiliary magnetic head. Procedure correction hall (method) % formula % Display of the case Patent application No. 193699 of 1988 Name of the invention Memory and playback device Relationship to the case Patent applicant address 1-7 Yukitani Inuzuka-cho, Ota-ku, Tokyo Issue name (AO9) Representative Alps Electric Co., Ltd. Masa Kataoka Takayo 1 Rito 〒169 Figures 4A, 4B, and 7A to 7D of the drawings subject to correction. Contents of the amendment As shown in the attached sheet, Factor 7A

Claims (1)

[Scope of Claims] 1. A storage/reproducing device using a rotary head device equipped with a magnetic head and rotationally driven by a motor, wherein the rotary head device has magnetic heads arranged at an angle of 180 degrees, each of which has a magnetic head. A memory comprising a plurality of pairs of magnetic heads having the same azimuth angle, and an auxiliary magnetic head having an azimuth angle opposite to that of the magnetic head provided near at least one of these magnetic heads. Claim 1: In the reproducing device 2, the auxiliary magnetic head is arranged at a position shifted from other magnetic heads in the axial direction of the rotary head device.
The storage and playback device described