JPH01258282A - Recording and reproducing system of information signal using magnetic recording medium disk to obtain tracking control information with change detection of electrostatic capacity value - Google Patents

Abstract

PURPOSE:To easily attain the high density recording and reproducing of the signals of plural channels by using an electrode, whose width is within a recording track interval Tp of a tracking referring signal and over a width Tm in a plain area between tracking signals, detecting the change of electrostatic capacity and executing tracking control. CONSTITUTION:In a magnetic recording and reproducing area MD between recording tracks tp of the tracking signals, in which a geometrically shaped bit is arranged, the recording and reproducing of the signals in the plural channels is executed by plural magnetic heads Mh1 and Mh2 to be provided in a recording and reproducing element RP. Thus, in the element RP, an electrode E, whose width Ew is within the track pitch Tp of the recording track tp and over the width Tm of the area MD, is provided and the tracking control is executed so that the change of the electrostatic capacity by the recording track tp of both side thereof can be equal. Thus, the high density recording and reproducing of the signals in the plural channels can be easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an information signal recording and reproducing method using a magnetic recording medium disc in which racking control information to 1 is obtained by detecting changes in capacitance values.

(Prior Art) As the demand for recording various information signals at high recording densities has increased, in recent years information recording media created based on various structural and operating principles have been used to record information ( It is well known that high-density recording and reproduction of the IT issue has been carried out, for example, for information recording media (
An information signal is recorded by forming unevenness according to the ff and surface information, and the recorded information signal is reproduced by optical means, or by detecting a change in capacitance value. The recording/playback device used for playback is
It is already in practical use for recording and reproducing video and audio signals, and in order to meet the demands for high-density recording and reproducing in various technical fields, beams whose intensity is modulated by information signals are applied to the recording layer of information recording media. By irradiating
Research has also been conducted on information recording media in which information signals can be recorded by causing physical or chemical changes in the recording layer of the information recording medium in response to the information signal, but in recent years this has been particularly As semiconductor lasers with stable operation became easier to obtain.

It is well known that various types of optical discs that perform high-density recording and reproduction using laser light have already been put into practical use, and research and development is currently underway to put them into practical use.

Now, as the demand for recording various types of information in many technical fields with high recording density has increased, in recent years, information recording media created based on various construction principles and operating principles have been used. High-density recording and reproduction of information signals has been attempted, and optical discs that can be added once by the user (write-once optical discs) and erasable optical discs have been put into practical use for office file memories and other uses. A lot of research is being carried out on σn, and up until now it has been discovered that the recording layer of write-once optical discs and erasable optical discs is affected by the physical effects caused by the heating action of the laser beam spot. When classified based on whether information signals are recorded by physical changes, they are classified into bit forming type, bubble or uneven forming type, magneto-optical type, and phase change type (light transmittance 6 reflectance due to thermal energy).

Various formats have been proposed, such as thermal transformation type (which causes changes in absorption rate, etc.), as well as information recording media in which recording and reproducing operations are performed using energy other than light. It is well known that many proposals have been made for the tracking reference signal. It is also known that the tracking control operation is performed by reading out the change in the capacitance value, and magnetic recording is performed on the flat part between the bit strings of the tracking reference No. 4n described above. (Tokuko Sho 63-42
(Refer to Public Vehicle No. 72).

By the way, it is well known that a wideband video signal is required to obtain a single raw image with high resolution. Since it is desirable to have a narrow bandwidth, various techniques for narrowing the bandwidth using human visual characteristics, multiplex communication technology, and other technologies have been effectively utilized.
It is well known that video signals have been made narrowband, and the narrowband video signals are being used for transmission, recording and playback. As an example of the conventional technology, Color No. 14 (for example, O
A color television system (N
There are color video signals based on the TSC system and PAL system, and when it comes to recording and reproducing color video signals, video signals whose signal processing is performed using video signal narrowing technology as described above have traditionally been used. This is usually the case.

On the other hand, as the field of application of video signal recording and reproducing technology to image files such as still image files has expanded in recent years, there has been a demand for higher quality reproduced images. As explained in the prior art described above, in the case of recording and reproducing narrowband video (FI), it is naturally difficult to obtain a high resolution reproduced image, so it is difficult to obtain a high resolution reproduced image. Instead of recording and playing back video signals in the 41F band, it has become possible to record and play back video signals with an even wider band, so that high-resolution playback images can be obtained. .

As one of the video signal recording and reproducing apparatuses that can obtain high-resolution reproduced images, the present applicant's company, for example, uses three simultaneous Nos. 474 corresponding to each of the three primary colors of additive color mixture. A video signal recording and reproducing device that uses a separate recording and reproducing element to record on a recording medium and reproduce it from the recording medium, or HDT.
We are conducting experimental research on a recording and reproducing device that records and reproduces V and other wideband video signals as simultaneous signals of multiple channels.

(Problems to be Solved by the Invention) As in the above example, when multiple signals are magnetically recorded as simultaneous signals with a high degree of freedom and then reproduced,
As described in Publication No. 3-4272, unevenness corresponding to the 1-racking reference signal is formed on the signal surface of the disk in advance, and the 1-racking reference signal is read out as a change in capacitance value for tracking. Attempts have been made to perform recording and reproduction using a disk that can perform controlled operations, but recording and reproduction of multiple signals is performed by separate recording and reproduction elements each equipped with a reproduction needle and a magnetic head. If this is done, the ellipse formation will naturally become complicated, and also, if the disc is to be used for simultaneous recording and reproduction of multiple signals, it is necessary to form the ellipse on the signal surface of the disc in advance. Since a large number of recording traces due to unevenness corresponding to the tracking reference signal are required, a solution to this problem has been sought.

(Means for Solving the Problems) The present invention provides sequential tracking control information based on tracking reference signals formed by changes in the geometrical shape of a magnetic recording medium disk in which tracking control information is obtained by detecting changes in static ffi capacitance values. Let Tp be the interval between the recorded traces, and let E be the m-pole electrode +i provided for detecting the tracking reference signal as a change in capacitance value.
w, and furthermore, when 111 of the flat magnetic recording and reproducing area formed between the sequential recording traces by Tracking Reference No. 471, which is formed by the change in the geometrical shape described above, is Tm. , TI), Ew.

+j+ of the flat magnetic recording/reproducing area formed between the fit pole having the electrode 11J having the relationship T rn rflll with T tn $ E w ≦Tp and the sequential recording traces by the tracking reference signal described above. T m
A recording/reproducing element is provided with a plurality of magnetic heads arranged so as to form a plurality of recording traces at the same time, and a change in capacitance is detected by the electrodes in the recording/reproducing element. means for controlling tracking of the recording/reproducing element based on the tracking reference signal;
A magnetic recording medium disk is used in which tracking control information can be obtained by detecting a change in capacitance value, which is equipped with means for recording or reproducing individual information signals using a plurality of magnetic heads in the recording/reproducing element described above. An information signal recording/reproducing method, and a magnetic recording medium in which tracking control information is obtained by detecting a change in capacitance value.Sequential recording of recording traces using a tracking reference signal formed by a change in geometric shape in a disk. The trace interval is Tp, and m is provided to detect the above-mentioned tracking reference signal as a change in capacitance value.
Let 'In t4i +1J of ti be Ew, and furthermore, let 111 of the flat magnetic recording/reproducing area formed between the sequential recording traces by the tracking reference signal formed by the above-mentioned geometric shape change be Tm, the above 17 p* E w r T m
I of a flat magnetic recording/reproducing area formed between an electrode having an electrode width such that m≦Ew≦'rp and the sequential recording traces caused by the above-mentioned tracking reference signal.
A magnetic recording medium disk is used in which tracking control information can be obtained by detecting changes in capacitance, in which a plurality of magnetic heads are arranged so that a plurality of recording traces can be formed at the same time. The present invention provides a recording/reproducing element for a recording/reproducing method of information signals.

(Example) Below, specific contents of the recording and reproducing method of information signals using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in capacitance value of the present invention will be described in detail with reference to the attached drawings. explain.

FIG. 1 is a block diagram of an embodiment of an information signal recording and reproducing method using a magnetic recording medium disk in which tracking control information is obtained by detecting changes in static 111 consumption values of the present invention, and FIGS. 2 to 6 7, 9 and 10 are diagrams illustrating the correspondence between the recording and reproducing elements and the recording traces on the disk, and FIGS. Figure 12 shows successive recording traces on the disk due to the tracking reference signal and several recording traces formed within the flat magnetic recording/reproduction area formed between the sequential recording traces due to the tracking reference signal. FIG.

First, in Figure 1, D is for magnetic recording and reproduction! /1 (disk), and on this disk D, there is a recording trace by a tracking reference signal by an arrangement of changes (bits) in the geometric shape such that tracking control information can be obtained by detecting changes in capacitance value. tp (Fig. 2, Fig. 3, Fig. 7, Fig. 9, Fig. 11.

(see FIG. 12), the recording trace tp due to the tracking reference signal on the disk D described in 1) is, for example, as illustrated in FIGS. 11 and 12. T formed every round from a specific radial position to that specific radial position.
A recording trace interval 'l''p across a flat magnetic recording/reproducing area MO having a width of m (however, 1' P >'I' m
).

The record trace Lp by the tracking reference No. 18 mentioned above is 1
For example, the flat magnetic recording/reproducing area MD with the width Tn- mentioned above.
2 tracking reference signals f pi each having a different low frequency value located in a frequency band lower than the 4W occupied frequency range of the information signal to be recorded and reproduced in the plurality of upper recording traces for magnetic recording and reproduction provided in the , f p
2 (hereinafter sometimes referred to as signals fpl and fp2), recording traces are formed at a recording trace interval Tp (1'p >'I'm). and has the record trace pattern shown in Figure 11,
In "Suf1-", two types of tracking reference signals fi11.[112
113 may be recorded, and in the following explanation it is assumed that the specific signal 1"p3 described above is recorded). In the figure and FIG. 12, the circle mark and triangle mark in the figure indicate that one of them, ti, is tracking #.
IK (represents one of the signals rPl+fP2,
Furthermore, the other of the circle and triangle marks in the figure is used to indicate the other of the tracking reference signals fpl and fpi).

The disk D is rotationally driven by a drive motor Md and fixed to a turntable '1'T by a clamper C, and the drive motor Mcl is rotated at a predetermined rotation speed by a disk servo circuit (not shown), that is, reference synchronization. The information signal is recorded and reproduced by the recording/reproducing cable Rp in a state of being driven and rotated by the driving motor Md which rotates at a constant rotation period having an integer ratio with the period of In.

The recording/reproducing element ttp described above is for detecting the tracking reference signal recorded on the disk D as a change in capacitance value, as illustrated in FIGS. 2 to 6 and 8. With electrode part E.

A plurality of magnetic heads M hl and M ti2 for recording and reproducing information signals on the magnetic recording medium of the disk D.
It is composed of...

That is, the recording/reproducing element RP illustrated in FIGS. 2 to 6 and 8 records sequential recording traces jP+jP... by the tracking reference signal formed by changes in geometric shape. The recording trace interval is Tp, and the fit pole E electrode +1 is provided to detect the above-mentioned tracking reference No. 18 as a change in capacitance value.
1 as Ew, and sequential recording traces tp formed by the tracking reference signal formed by the above-mentioned changes in the geometrical shape.

A flat magnetic recording/reproducing area MD formed between tp
When ITm is assumed to be the medium of
A tit pole E having an electrode 10EV having a relationship of 71'm≦EV≦TP between ``I''m, and a sequential recording trace t13. by the above-mentioned tracking reference signal. Il of the MD of the flat magnetic recording/reproducing area formed between tp
A plurality of (+1) magnetic heads M arranged so as to simultaneously form a plurality of recording traces within l'r m.
It is composed of bl, Mh2, and so on.

In the figure, D is the disk, and Pw is the tracking reference 1K (111 in the radial direction of the pit 111 [disk I] based on the 7 signals).
1) and Gw respectively indicate the non-recorded portion (girt band) formed between adjacent magnetic heads, and Tw indicates the recording trace formed by each magnetic head.

Each recording/reproducing element RP illustrated in FIG. 2 and FIGS. 4 to 6 has a plurality of recording/reproducing elements RP in the same magnetic recording/reproducing area/' area MD as the flat magnetic recording/reproducing area MD in which the electrode E is located. This is a recording/reproducing element -f- having a configuration in which a plurality of magnetic heads Mhl, Mb2, . . . are arranged, and the plurality of magnetic heads Mh1. A guard band with a mountain GW is provided in the operating gap between adjacent magnetic heads in M h 2 . . . .

The recording/reproducing element RP shown in FIGS. 4 and 5 is
This shows an example of a configuration in which each is configured with an ffi pole E and a plurality of thin film magnetic heads.
In the figure, 8 is a coil, 9 is a thin film upper core, 10 is a thin film bottom core, in FIG. 5, 13 is a gap material, 14 is a coil, 11 is a thin film top core, 12 is a thin film bottom core, 15
1 is a connection terminal (bonding butt portion), and 16 is an insulating material.

Further, the recording/reproducing element RP shown in FIG.
It is composed of a single pole E and a plurality of thin film heads for perpendicular magnetic recording and reproduction.
7 is an insulating substrate, and 14 is a coil.

15 is a connection terminal (bonding butt portion), and 18 is a main magnetic pole.

Furthermore, FIG. 3 shows a plurality of magnetic heads Mbl, Mh2, .
The recording/reproducing element RP is configured such that the recording/reproducing element R is arranged as shown in FIG.
I) is said to be such that the operating gears of the plurality of magnetic terminals M+l, Mb2 are aligned in the longitudinal extension direction of Ylt and pole E. .

Furthermore, each recording/reproducing element 1 illustrated in FIGS. 8 and 10, respectively? r) is a flat magnetic recording/reproducing area Ml) in which the electrode E is located, and a plurality of magnetic heads Mk arranged in the same magnetic recording/reproducing area MD.
A configuration in which the azimuth angles of mutually adjacent items in r l, M h 2... are arranged at different specific angles (10, -a in the example in the figure)! rM's W('r recording/reproducing element RP, and in each recording/reproducing element Rl' illustrated in FIGS. 8 and 10, respectively, a plurality of magnetic heads M kr 1.
There is no need to construct guard bands between adjacent ones in M h 2.

Figures 7, 9, and 10 show recording and reproduction,
Fig. 1) is a diagram explaining the correspondence between recording traces on disk l) and recording traces on disk l], and the recording/reproducing probe RI) is a reproduction output of two types of tracking reference signals reproduced by an electrode E provided thereon. Tracking is controlled so that they are equal, so that recording and reproduction is performed within Ill Tm of the flat magnetic recording and reproduction area MD formed between recording traces tp, t■] caused by adjacent tracking reference signals. Element RP
The i opening between the plurality of magnetic heads provided in the
This diagram illustrates and explains the scales in which multiple records are formed simultaneously.

In other words, in the recording and reproducing method of information signals using a magnetic recording medium disc in which tracking control information is obtained by detecting changes in capacitance value according to the present invention, tracking fli control is performed by detecting changes in capacitance value. By arranging changes (bits) in the geometric shape such that information can be obtained, the record trace up by the 1-racking reference signal (Fig. 2, Fig. 23, Fig. 7, Fig. 9, Fig. 11, 1-A flat magnetic recording book with il of 1"In formed between adjacent ones of 1-ranking reference signals t p on disk D on which 1-ranking reference information (see FIG. 12) is provided in advance!U: A plurality of magnetic heads M b 1. M h are provided in the area MD.
2... to form a plurality of recording traces by a plurality of No. 4n simultaneously, and for this purpose, the electrode E to be provided in the recording/reproducing element RP is the electrode III Ew. The distance between adjacent recording traces tp according to Tracking Reference No. 48, that is, the relationship between EV≦'I' I) with respect to the recording trace interval (track pitch) Tp between the recording traces according to Tracking Reference No. 18 is used to reproduce a tracking reference signal that enables good tracking control of the recording/reproducing element Rl by the electrode E, thereby reducing the width of the gap formed between adjacent recording traces LP by the tracking reference signal. is I”rn (where T p >'r nl
), a plurality of magnetic recording traces are formed in the flat magnetic recording/reproducing area Ml) of the recording/reproducing element I/P for magnetic recording/reproducing. This ensures that it is formed correctly.

Now, as shown in FIG. 1, the above-mentioned recording/reproducing element
The nine wheels attached to the T are driven and displaced in response to a walking control signal. Further, the rotating shaft 4 of the transfer motor Mf shown in FIG. There is.

A transfer body FA to which an actuator ACT is attached is engaged with the feed screw 6, and as the feed screw 6 is rotationally driven, the transfer body FA is fed while being guided by the guide rod 7. It is transferred as the screw 6 rotates.

In FIG. 1, SWI to SWn are recording/reproducing switch;
PrAt is an off device width switch for the tracking reference signal detected as a change in the electrostatic Ilt value by the electrode section E in the recording/reproducing element R1), and the tracking reference signal output from this preamplifier PrAt is The signal is supplied to the tracking control circuit '1''SC.

The tracking control signal generated by the tracking control circuit °I''SC is supplied to the actuator ACT, and the low-frequency signal component of the tracking control signal is supplied to the transport motor Mf, so that the recording/reproducing element RP The position control of the recording/reproducing element during recording/reproduction is performed correctly.During the above operation, the above-mentioned signal fp3 recorded on the disk D is a tracking control signal at a specific radial position of the disk D. It is used as a timing signal for switching.

Information using a magnetic recording medium disk in which tracking control information can be obtained by detecting changes in capacitance values according to the present invention as shown in FIG. Changeover switch 5W1=SWn
The movable contacts of the changeover switches 5WI-8Wn are switched to the fixed contact R side, and when the reproduction mode is set, the movable contacts of the changeover switches 5WI-8Wn are switched to the fixed contact I) side.

In recording mode, multiple signal sources SQL to SG
n (No. 4 is generated by the corresponding modulation 11
(one of MODI-MOOn) into a signal suitable for recording, then the corresponding recording amplifier (
RAl = one of RAn), and is amplified by the magnetic head (Rhl to Rhn) in the recording/reproducing element RP via the fixed contact R and movable contact of the corresponding changeover switches SWI to SWn. (the corresponding one).

At this time, since the recording/reproducing element RP is subjected to tracking control so that the reproduced outputs of the two types of tracking reference signals reproduced by the electrode E provided thereon are equal, the recording/reproducing element RP is A plurality of magnetic heads M b l .

Mh2... is il! based on the adjacent tracking reference signals on the disk D! i! A flat magnetic recording/reproducing area MD with a width T rn formed between recording traces j'P+LP
In this way, multiple records are created simultaneously.

Next, in the reproduction mode, since the recording/reproducing element RP is subjected to tracking control so that the reproduced outputs of the two fl tracking reference signals reproduced by the electrode E thereof are equal, the recording/reproducing element RP A plurality of magnetic heads Mhl, Mh2, etc. provided in the magnetic recording head Mhl, Mh2, etc. are arranged in a flat magnetic recording/reproducing area MD having a width of 1 mm, which is formed between recording traces tP+ jp caused by adjacent tracking reference signals. Information signals are reproduced from corresponding ones of the plurality of recording traces formed in the.

The above playback signals are selected by the corresponding changeover switch S.
It is supplied to the corresponding one of the preamplifiers Pt, Al-Pr, and An through the movable contact of Wl-SWn and the fixed contact P, and is amplified, and then the preamplifier described above! ] [・Output from A l-P r A n (Ft signal is output from demodulator D E M provided correspondingly)
1-D E M n, and the corresponding output terminals 1, 2 . 7 (Effects of the Invention) As is clear from the above detailed explanation, 1) the present invention uses a magnetic recording medium disk in which tracking control information can be obtained by detecting a change in capacitance value. The recording and reproducing method of Information 4R is to record sequential recording traces using a tracking reference signal that is formed by a change in the geometric shape of a magnetic recording medium disk in which tracking control information is obtained by detecting a change in capacitance value. The trace interval is Tp, and the voltage of the electrode (4i+
i+ is Ew, and furthermore, the width of the flat magnetic recording/reproducing area formed between the sequential recording traces by Tracking Reference No. 48 formed by the above-described geometric shape change is Tm. sometimes.

17 m≦Ew≦'l' between Tp, Ew, and Tm mentioned above
Il of the flat magnetic recording/reproducing area formed between tftJ& having an electrode width having a relationship of p and the sequential recording traces by the above-described tracking reference IKI signal.
A change in the capacitance value is caused by a recording/reproducing element having a plurality of magnetic heads arranged so as to simultaneously form a plurality of recording traces in l Trn, and an electrode in the aforementioned recording/reproducing element. means for controlling the tracking of the recording/reproducing element based on a tracking reference signal detected as a tracking reference signal; and means for recording or reproducing individual information (ff) by a plurality of magnetic heads in the recording/reproducing element. Magnetic recorder 8 that can obtain dragging control information *μ by detecting changes in capacitance value.
A tracking reference (M The recording trace interval of sequential recording traces by number is % 'l'' II,
Also, refer to the above-mentioned 1-ranking 4M s'f
Let Ew be the electrode 11+ provided for detecting changes in the capacitance value, and furthermore, let Ew be the number of electrodes provided to detect changes in the capacitance value. When the flat magnetic recording/reproducing area 111 formed between the recording traces is 1' + n, the above-mentioned "I' r L w * 'l'm"
A flat magnetic field formed between an electrode having a width i4i such that there is a relationship of 'l'm≦Ew≦'i'p, and the sequential recording traces by the above-mentioned tracking reference JKI No. 18. In the recording/reproducing area 11]71' rn, I ~ racking control information is obtained by detecting changes in the electrostatic consumption value by simultaneously forming a plurality of marks and arranging a plurality of magnetic heads in a circular manner. This is a recording/reproducing element for an information signal recording/reproducing method using the obtained magnetic recording medium disk, and the information signal using the magnetic recording medium disk in which tracking control information can be obtained by detecting a change in capacitance value according to the present invention. With the recording and reproducing method, high-density recording and reproducing of multiple channel signals can be easily performed under 1-ranking control. For example, three simultaneous signals corresponding to the three primary colors of additive color mixture may be recorded on a recording medium and reproduced, or
Advantages such as the ability to easily configure a recording and reproducing apparatus that records and reproduces DTV and other wideband video signals as simultaneous signals of multiple channels can be obtained.

[Brief explanation of the drawing]

fjS11ii! 1 is a block diagram of an embodiment of an information signal recording and reproducing method using a magnetic recording medium disc in which racking control information is obtained by detecting changes in capacitance value according to the present invention; FIGS. 2 to 6; FIG. 8 is a diagram showing an example of the configuration of a recording/reproducing element.
The figure is a diagram explaining the correspondence between the recording/reproducing element and the recording traces on the disc. Figures 11 and 12 are the tracking marks on the disc (see the sequential recording traces by M ridges and the above 1-ranking). It is a diagram showing a plurality of recording traces formed within a flat magnetic recording/reproducing area formed between sequential recording traces due to signals. 1 to 23- Output terminal, 4. Rotation. Shaft, 5..., Reducer, 6, Feed screw, 8... Coil, 5] Seven cores of thin film,
10... Lower core of thin film, 13... Gap material, 14
... Coil, 11 ... Thin film upper core, 12 ... Thin film lower core, 15 ... Connection terminal (bonding panoto part), 16 ... Insulating material, 17 ... Insulating substrate, 18・・・
・Main magnetic pole, l)...Magnetic recording medium disk (disk),
l II...1-recording traces based on tracking reference signals based on arrays of geometric shape changes (focus) that allow racking control information to be obtained, M I)... flat magnetic recording and reproducing area. R... Disc L-return lid, I3L,・
[Tracking reference signal], Md... Drive motor, "I"1'... Turntable, C... Clamper, 1 in 1]... Recording/playback mechanism, 2 children, E... Electrode Department (
electrode), M h l=M ) + n...magnetic head. Ew...electrode width. 71'p... Sequential recording traces LP and tp recording trace intervals based on the tracking reference signal, Pw and bit 111 (111 in the radial direction of disk D) based on tracking reference No. 04, Gw... Adjacent magnetic heads The width of the unrecorded part (gart band) formed between, ′vW・
・Record traces +lJ,A formed by each magnetic head
CT...Actuator of tracking control system, Mf
...Transfer motor, guide rod, l"A...transfer body,
5W1-S Wn---Recording/playback switch, PrAt
, r'+・A1-PrAn・・Preamplifier, 'rsc・
・・1-Racking control circuit, S (i l-S G
n-signal source, MODI-MODn-transformer, RAI
-RAn-recording amplification, DEMI-DEMn-demodulator. 1. 2 = 3 ゝMhn ″ , / 1/′ , 11 12 RP ′゛He

Claims (1)

[Claims] 1. Tracking control information is obtained by detecting changes in capacitance.Sequential recording traces based on tracking reference signals formed by changes in geometric shape in a magnetic recording medium disk. The interval is T_p, the electrode width of the electrode provided for detecting the above-mentioned tracking reference signal as a change in capacitance value is E_w, and T_m is the width of the flat magnetic recording/reproducing area formed between the sequential recording traces based on the tracking reference signal.
When, T_p, E_w, T_m mentioned above is T_p, E_w, T_m.
Within the width T_m of a flat magnetic recording/reproducing area formed between an electrode having an electrode width that satisfies the relationship _m≦E_w≦T_p and the sequential recording traces by the above-mentioned tracking reference signal, a plurality of A recording/reproducing element comprising a plurality of magnetic heads arranged to simultaneously form recording traces, and a tracking reference signal detected as a change in capacitance by the electrodes in the recording/reproducing element. Tracking is performed by detecting changes in capacitance, comprising means for tracking and controlling a recording/reproducing element based on the above-mentioned recording/reproducing element, and means for recording or reproducing individual information signals using a plurality of magnetic heads in the aforementioned recording/reproducing element. Information signal recording/reproducing method 2 using a magnetic recording medium disc from which control information is obtained, tracking control information is obtained by detecting changes in capacitance value. Let T_p be the interval between successive records recorded by the tracking reference signal, and let E_w be the electrode width of the electrode provided to detect the tracking reference signal as a change in capacitance value. The width of the flat magnetic recording/reproducing area formed between the sequential recording traces of the tracking reference signal formed by the above-mentioned geometric shape change is T_m.
When, T_p, E_w, T_m mentioned above is T_p, E_w, T_m.
Within the width T_m of a flat magnetic recording/reproducing area formed between an electrode having an electrode width that satisfies the relationship _m≦E_w≦T_p and the sequential recording traces by the above-mentioned tracking reference signal, a plurality of A recording and reproducing system for recording and reproducing information signals using a magnetic recording medium disc in which tracking control information is obtained by detecting changes in capacitance values, in which a plurality of magnetic heads are arranged so that recording traces can be formed simultaneously. 3. The magnetic recording device according to claim 2, wherein a plurality of magnetic heads are arranged in a flat magnetic recording/reproducing area in which the element 3 and the electrode are located. A recording/reproducing element 4 for an information signal recording/reproducing method using a medium disk, a plurality of magnetic heads in one flat magnetic recording/reproducing area parallel to a flat magnetic recording/reproducing area in which electrodes are located. A recording/reproducing element 5 for an information signal recording/reproducing system using a magnetic recording medium disk in which tracking control information is obtained by detecting a change in capacitance value according to claim 2, wherein a flat magnetic 5. Detection of change in capacitance value according to claim 3 or 4, wherein the plurality of magnetic heads to be arranged in the recording/reproducing area are arranged so that the azimuth angles of adjacent ones thereof are different from each other. A recording/reproducing element for an information signal recording/reproducing method using a magnetic recording medium disk in which tracking control information can be obtained by