JPS63117358A - Recording and reproduction system for information signal using variation detection type recorded information recording medium disk for electrostatic capacity value - Google Patents

Abstract

PURPOSE:To perform the magnetic recording and reproduction of a disk excellently by specifying the relation among the recording track interval of a variation detection type recorded information recording medium disk for an electrostatic capacity value, the electrode width of an electrode for variation detection for the electrostatic capacity value, and the track width M of a magnetic head for magnetic recording and reproduction, and carrying out the magnetic recording and reproduction by a magnetic head which has a magnetic gap. CONSTITUTION:When the recording interval of the variation detection type recording information recording medium disk for the electrostatic capacity value is denoted as TP, the electrode width of the variation detecting electrode for the electrostatic capacity value is as Sew, and the track width of the magnetic head for magnetic recording and reproduction is as Mtw, the relation among the recording track interval TP, the electrode width Sew, and the track width Mtw is so set that Sew<Tp<Mtw<N.TP (where N is a positive integer larger than 2). Then the magnetic recording and reproduction are carried out by the magnetic head which has the magnetic gap 9 positioned at a prescribed distance. Consequently, the magnetic recording and reproduction of the disk D are performed excellently.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an information signal recording and reproducing method using a recorded information recording medium disc of a capacitance change detection type. (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 signals at high recording densities. It is well known that high-density recording and reproduction of signals has come to be carried out.1 For example, information signals are recorded by forming irregularities corresponding to the information signals on the signal surface of an information recording medium. A recording and reproducing apparatus reproduces a recorded information signal by optical means or by detecting a change in capacitance value. 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 begun on information recording media in which information signals are recorded by causing a physical or chemical change in the recording layer in response to the information signal. As semiconductor lasers capable of efficient operation have become easily obtainable, various types of optical discs that use laser light to perform high-density recording and reproduction have already been put into practical use, or research is underway to put them into practical use. It is well known that development is currently underway. By the way, there is a recording and reproducing apparatus that records information signals by forming unevenness in accordance with the information signals on the signal surface of an information recording medium, and reproduces the recorded information signals by detecting changes in capacitance value. As mentioned above, it has already been put into practical use for recording and reproducing video and audio signals, but in this way, the information recording medium Holiday! The information signal recorded on i (disk) as a change in geometric shape is read out by detecting the change in capacitance value by a capacitance change detection type playback needle (hereinafter referred to as playback needle). The recording and reproducing method that detects changes in capacitance value is performed because the electrode of the reproducing needle used to read out the information signal is extremely thin.
Compared to discs that use light to read information signals from the disc, it is easy to read out information signals due to a pit array with a much smaller size. By using resins and molding methods that allow good performance. Disks capable of even higher density recording can also be easily provided. By the way, a disc configured in such a way that the reproduction of the information signal recorded as a change in geometrical shape is performed by detecting a change in capacitance value is possible because the information signal transferred from the stamper and A thin metal film is deposited on the surface of a resin substrate on which a corresponding pattern of unevenness is formed, a thin film of dielectric is deposited on the thin film of metal, and A structure in which a layer of a lubricant such as silicone oil is provided on a thin film of 1 is disclosed, for example, in JP-A No. 47-37415, and 1 is a coating of a synthetic resin such as polyvinyl chloride. For example, a configuration in which an array pattern of concave and convex portions corresponding to an information signal is transferred from a stamper onto the surface of a base material containing microparticles of a conductive material (e.g., carbon or metal fittings) microencapsulated by a stamper is also available. Publication No. 53-116104, Japanese Patent Publication No. 53-11
This is disclosed in JP-A No. 9017, JP-A-54-140518, JP-A-55-38699, and other known documents. The playback stylus used to read information signals from the disk described above is used in sliding contact with the disk surface that is rotating at high speed, so the playback stylus is in contact with the disk surface. It gradually wears out due to sliding contact, so the above-mentioned recycled needle is made of a highly hard material with wear resistance, such as diamond, so that it can withstand long-term use. A regenerated needle body made of a material such as sapphire is used with electrodes made of a conductive material formed thereon. In addition, as mentioned above, the surface of the disk that rotates at high speed with the recycled needle in sliding contact with it is made of a highly hard material with wear resistance, and its surface is not easily worn out by the sliding contact of the recycled needle. In conventional disks, a thin film of lubricant was applied to the surface to improve surface lubricity, giving the disk wear resistance. During playback of still images (still playback), damage to the disc became a problem. The appearance of a disc that is highly stable over a long period of time without the above-mentioned problems has been long awaited, so the applicant's company has previously developed a disc made of resin on which information is recorded as changes in geometric shape on the surface. on the surface of the board. The above-mentioned problems are solved by providing a capacitance change detection type information recording medium disc in which a metal thin film is deposited and a highly resistive carbon iR thin film is deposited on the metal thin film. solved. (Problems to be Solved by the Invention) As the demand for recording various information signals at high recording densities in many technical fields has increased, in recent years, there has been a rise in the demand for recording various information signals at high recording densities in many technical fields. Attempts have been made to record and reproduce information signals at high density using information recording media made from A lot of research and development is being carried out for the practical application of file memory and other applications, and so far, write-once optical discs or erasable optical discs have been developed, in which the recording layer is exposed to the spot of the laser beam. When classified based on the physical change in which information signals are recorded due to the heating action of Various formats have been proposed that can be broadly categorized, such as light transmittance (9 reflectance), thermal transformation type (which causes changes in absorption rate, etc.), as well as recording and reproducing operations that use energy other than light. It is well known that many proposals have been made for information recording media that allow this information to be transmitted, but one of these proposals is to form unevenness on the signal surface of the disc in accordance with the information signal. By configuring a recorded disk that detects changes in capacitance value and can be used as a disk for magnetic recording and playback, it is possible to record and play back new information signals. There is an attempt to increase the recording capacity of a disk under such conditions. As mentioned above, in a disk configured such that a recorded disk that detects changes in capacitance value can also be used as a disk for magnetic recording and playback, the capacitance value is displayed on the disk surface during recording and playback operations. Since the change detection electrode and the magnetic head are in sliding contact, the disk surface must have particularly excellent wear resistance. A thin metal film is deposited and formed on the surface of a resin substrate on which information is recorded as changes in geometric shape on the disk, which has the configuration proposed by the applicant's company as described above. , a configuration mode in which a magnetic thin film such as a nickel-cobalt alloy is used as the metal thin film in a capacitance change detection type disk in which a highly resistive carbonaceous thin film is deposited and formed on the metal thin film. It is considered suitable. However, it has become possible to use recorded disks that detect changes in capacitance values, which record information signals by forming unevenness on the signal surface of the disk in accordance with the information signals, so that they can also be used as disks for magnetic recording and playback. When we tried magnetically recording and reproducing new information signals on it, we found that the spacing and bits formed on the signal surface of the disk were
Since magnetic recording and reproduction cannot be performed satisfactorily due to loss, a solution to this problem has been sought. (Means for Solving the Problems) According to the present invention, reproduction of a recorded information signal and reproduction of a recorded tracking reference signal are performed by detecting a change in capacitance value, and magnetic recording A method for recording and reproducing information signals using a capacitance value change detection type recorded information recording medium disc configured to also enable playback, wherein the above-mentioned capacitance value change detection type recorded information is recorded. When the recording trace interval on the recording medium disk is TP, the electrode width of the capacitance change detection electrode is Sew, and the track width of the magnetic head for magnetic recording and reproduction is M tw. The recording trace interval TP of the capacitance change detection type recorded information recording medium disk, the electrode width Sew of the capacitance change detection electrode, and the track width M t of the magnetic head for magnetic recording and reproduction. The relationship with W is Sew<TP<Mtw<N
-TP (where N is a positive integer of 2 or more), and the capacitance value of the recorded information signal from the capacitance change detection type recorded information recording medium disk described above. While the reproduction operation based on change detection is being performed in the N times speed reproduction mode, a magnetic head equipped with a magnetic gap located at a predetermined distance from the position of the electrode for detecting a change in capacitance value is used. The present invention provides an information signal recording and reproducing method using a capacitance value change detection type recorded information recording medium disc that performs magnetic recording and reproducing. (Example) Hereinafter, specific details of the information signal recording and reproducing method using the capacitance change detection type recorded information recording medium disk of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of an embodiment of an information signal recording and reproducing method using a capacitance change detection type recorded information recording medium disc of the present invention, and in this FIG. Changes in capacitance values are configured such that reproduction of information signals and reproduction of recorded tracking reference signals are performed by detecting changes in capacitance values, and magnetic recording and reproduction is also possible. It is a detection type recorded information recording medium disk (disk), and this disk D is driven by a drive motor Md.
The clamper C is fixed to a turntable TT which is rotationally driven by a clamper C. The drive motor Md is a disk servo circuit DSC (not shown).
The drive motor Md rotates at a predetermined rotation speed, that is, at a constant rotation period that is an integer ratio with the period of the reference synchronization signal. Now, in the information signal recording and reproducing method using the capacitance change detection type recorded information recording medium disk of the present invention, the disk is the object of recording and reproducing, that is, the reproduction of recorded information signals and the recorded information recording medium disk. Change-detection-type recorded information in capacitance, in which the tracking reference signal is reproduced by detecting changes in capacitance, and magnetic recording and reproduction are also possible. As a recording medium (disc), the mode of recording of the capacitance change detection type information signal is based on the capacitance change detection type recorded information recording medium disk (disc) developed by the applicant company. Disk D) is used, and a specific radial position (see Figures 2 and 3) on the disc D (see Figures 2 and 3) is used. 2-Z line position) to that specific radial position, a recording signal based on the main information signal of 4 vertical scanning periods is recorded, and a recording signal near that specific radial position is recorded. During each vertical blanking interval recorded in section a, a signal (
In the following explanation, a signal (sometimes referred to as signal fp3) is recorded, and an address signal of a recording trace is recorded during a specific horizontal scanning period during each vertical blanking period. and further located in a frequency band lower than the frequency band occupied by the main information signal described above, in such a manner as to sandwich a recording trace constituted by the arrangement of bits of the main information signal to be recorded and reproduced. Two types of tracking reference signals fP1., each having a different low frequency value. A recording trace is formed by fρ2 (hereinafter sometimes referred to as signals fpl and fP2), and furthermore, the two types of tracking reference signals fPl and fp2 described above are combined with the signal fp3 described above. Recording is performed while being sequentially and alternately switched for each recording position. In addition, a ” d in Figures 2 and 3
The part is the recording part of the vertical blanking period. FIG. 4 is a frequency allocation diagram of each signal recorded on the disc D as described above, and FM in FIG. 4 indicates the occupied frequency band of the frequency modulated wave signal by the main information signal.
In addition, fpl and fp2 in the figure indicate the two types of tracking reference signals fpl and fpl described above, and
ρ3 indicates a signal fp3 indicating the rotational phase of the disk D. In FIG. 1, RP is a recording/reproducing element, and this recording/reproducing element RP has an electrode section E for detecting the main information signal and tracking reference signal recorded on the disk D as changes in capacitance value. , a magnetic head M for recording and reproducing information signals on the magnetic recording medium of the disk D.
FIG. 5 and FIG. 6 are diagrams showing an example of the configuration of the recording/reproducing element RP described above, and (a) in each of FIGS. 5 and 6 is a perspective view, and FIG. And (b) in each time of FIG. 6 is a plan view of the sliding surface. In the recording/reproducing element RP shown in FIG.
2 is a support plate made of glass; 3 is a thin film made of ferromagnetic material; 4 is a thin film made of ferromagnetic material;
．． 5 is a coil of the magnetic head, 6 is an insulating support for forming the electrode portion E, 7 is a terminal connected to the electrode portion E, 8 is a terminal of the coil of the magnetic head, and 9 is a magnetic head of the magnetic head. In addition, in the recording/reproducing element RP shown in FIG. 6, 11 is a ferrite substrate;
3 is a support plate made of glass; 3 is a thin film made of ferromagnetic material; 4 is a thin film made of ferromagnetic material;
10 is a magnetic head coil, and 10 is a glass plate. Reference numeral 7 indicates a terminal connected to the electrode portion E, 8 indicates a terminal of a coil of the magnetic head, and 9 indicates a magnetic gap of the magnetic head. In each cycle, Sew is the electrode width and M tw is the inside of the magnetic gap. It should be noted that the center line of the electrode for detecting changes in capacitance value in the recording/reproducing element RP shown in FIG. 5 and the center line of the magnetic gap of the magnetic head are aligned, and In the recording/reproducing element RP shown in FIG. 6, 1. The center line of the electrode for detecting a change in capacitance value and the center line of the magnetic gap of the magnetic head are spaced apart from each other such that the distance is an integral multiple N of the recording trace interval TP. The recording/reproducing element RP described above is attached to an actuator ACT of a tracking control system, and is driven and displaced in accordance with a tracking control signal. Mf is a transfer motor, and the rotation @14 of this transfer motor Mf is coupled to the input shaft of the reduction gear 4+115, and the output shaft of the reduction gear 15 is coupled to the feed screw 16. A transfer body FA to which an actuator ACT is attached is engaged with the feed screw 16, and as the feed screw 16 is rotationally driven, the transfer body FA is fed while being guided by a guide rod 17. It is transferred as the screw 16 rotates. In FIG. 1, OP is an operating unit, DDC is a digital data processing circuit, SW is a recording/reproducing switch, and PrA is a signal detected as a change in capacitance by the electrode E in the recording/reproducing element RP. is a preamplifier,
The output signal from this preamplifier PrA is controlled by the control circuit O
The signal is supplied to CT, a signal processing circuit SDC, and a tracking control circuit TSC. In each of the above components, the signal processing circuit SDC performs various operations such as demodulating the main information signal, restoring the signal, separating the synchronization signal, and separating the address signal, and sends the video signal to the terminal 18. , and the audio signal to the terminal 19, and also supplies divided synchronization signals and address signals to the control circuit mccT. 20 is an output terminal for an output signal from the digital data processing circuit DDC, and 21 is an input terminal for an input signal to the digital data processing circuit DDC. In the configuration of the recording and reproducing apparatus according to the information signal recording and reproducing method using the capacitance change detection type recorded information recording medium disc shown in FIG. 1, a recording and reproducing element with a special configuration is used. , except for the fact that it is equipped with a digital data processing circuit DDC and that it uses a capacitance value change detection type recorded information recording medium disc that is configured to be able to perform magnetic recording and reproduction as a disk. A capacitance change detection type recorded information recording and reproducing method developed by the applicant's company, which reproduces signals and recorded tracking reference signals by detecting changes in capacitance value. The structure is similar to that of the playback device of the trademark VHDJ system, and the physical details of the tracking control system used in the recording and playback device, as well as the structure and operation of other characteristic main parts, are based on the 59th Special Publication. -21104 Publication, Special Publication No. 59-
46066, etc., so it is recommended to refer to those descriptions. Now, in the information signal recording and reproducing method using the capacitance change detection type recorded information recording medium disc shown in FIG. playback operation in normal playback mode by detecting changes in capacitance value, playback operation in still image playback mode by detecting changes in capacitance value, and double-speed playback mode by detecting changes in capacitance value. In addition to various playback operations such as playback operations in reverse playback mode by detecting changes in capacitance value, playback operations in double-speed playback mode by detecting changes in capacitance value, and simultaneous digital playback by the magnetic head. Simultaneously with the data recording operation, the reproducing operation in double-speed reproduction mode by detecting a change in capacitance value, and the digital data reproducing operation using the magnetic head. Figure 2 shows that a recording signal based on the main information signal of four vertical scanning periods is recorded every revolution from a specific radial position [Z-zH position to that specific radial position, and the above-mentioned specific radial position is recorded. A capacitance value change detection type disk having a configuration in which a signal fp3 indicating the rotational phase of the disk D is also recorded during each vertical blanking period recorded in the recording portion a near the radial position is used. The locus of the reproducing element during reproduction at double speed is schematically shown by a solid line, and FIG. A recording signal based on the main information signal of the four vertical scanning periods is recorded, and a signal indicating the rotational phase of the disk D during each vertical blanking period is recorded in the recording portion a near the specific radial position. fP3
The solid line schematically shows the locus of the reproducing element when reproducing a capacitance value change detection type disc having a configuration in which the second disc is recorded at 3x speed.
In the figures and FIG. 3, the portion indicated by dotted lines shows the recording trace followed by the reproducing element in the normal reproducing mode. When the disc playback device operates in the double-speed playback mode, in order to cause the playback element to follow the trajectory described above on the disc D, a signal recorded at a specific radial position on the disc is required. The control signal generated by the control circuit CCT based on the position information of fP3 and the double speed information set in the 8A processing section is sent to the tracking control circuit T'SC.
The recording/reproducing element RP may be driven and displaced at a predetermined position on the disk D by supplying the recording/reproducing element RP to a predetermined position. FIG. 7 shows a capacitance change detection type recorded information recording medium disk (disc) used for recording and reproduction in the recording and reproduction method of the present invention, that is, disk D (see FIG. 3 in the second article). A recording signal based on the main information signal of 4 vertical scanning periods is recorded every revolution from a specific radial position to that specific radial position, and During each vertical blanking period recorded in the recording portion, a signal fP3 indicating the rotational phase of the disk D is recorded, and a recording trace is recorded during a specific horizontal scanning period during each vertical blanking period. address signal is recorded, and furthermore, in such a manner as to sandwich a recording trace constituted by an arrangement of bits of the main information signal to be recorded/reproduced, the frequency band occupied by the main information signal is A recording trace is formed by two types of tracking reference signals fPI, fP2 having different low frequency values located in a low frequency band l, and furthermore, two types of tracking reference signals fPL, fP2 described above are formed. fP2 is the signal fp3 described above.
A plan view of a part of the disk D (FIG. 7(a)
) and a longitudinal side view ((b) of FIG. 7), in which Pm, Pm... indicate bits formed on the disk surface by main information signals, and Ptl
, Ptl... indicate pits formed on the disk surface by the tracking reference signal fpl, and further,
Pt2. Pt2... is the tracking reference signal fp2
shows the pits formed on the disk surface, and this disk D has a recording trace Tm formed by an arrangement of pits Pm, Pm, etc. due to the main information signal to be recorded and reproduced. In this manner, pits Ptl and Pt of two types of tracking reference signals fpl and fP2, each having a different low frequency value and located in a frequency band lower than the occupied frequency band of the main information signal, are detected.
A recording trace Tt is formed by 1..., Pt2°Pt2.... In the above-mentioned disk D, pits Pm, Pm, . . . formed by the main information signal are usually formed on the recording trace Tm of the main information signal over almost the entire length direction thereof. , pits Ptl and Ptl of two types of tracking reference signals f pi and f P2 provided on both sides of the recording trace Tm by the main information signal described above.
..., Pt2. In the record trace Tt by Pt2...,
Tracking reference signal fP1. In order to prevent interference with the main information signal caused by fp2, the tracking reference signals f pi, f are sent only intermittently in the extending direction of the recording trace Tt.
P2 pit Ptl, Ptl..., Pt2゜Pt
2... is not formed. Figure 7

The area indicated by A in FIG. 1A includes pits Ptl of two types of tracking reference signals fpl and fp2 on both sides of the recording trace Tm caused by the main information signal described above. Ptl..., Pt2. Record trace T by Pt2...
This is the part where t is formed, and (a) in Fig. 7
The area indicated by B' contains two types of tracking reference signals f on both sides of the recording trace Tm caused by the main information signal described above.
P1. Pit ptl, P in the record trace Tt by fP2
t1..., Pt2. This is the part where Pt2... does not exist. When the above-mentioned main information signal is a composite video signal, the above-mentioned area A corresponds to the horizontal blanking period, and in this case, the length of the above-mentioned area indicated by A is as follows. , occupies approximately 10% of the total length of the recorded trace Tt. FIG. 7(b) is a longitudinal sectional side view taken along line XX of the portion indicated by area A in FIG. 7(a). By the way, if the recording mode based on the pit arrangement corresponding to the information signal on the capacitance change detection type recorded information recording medium disk (disk) is as shown in FIG. Even if information signals are magnetically recorded and reproduced using a magnetic head that is in sliding contact with the disk surface on the magnetic layer configured as shown in D, the presence of pits formed on the disk surface makes it difficult to read the information signals in good condition. It is difficult to record and reproduce magnetically. In other words, during magnetic recording and reproduction, if there is a gap between the magnetic gap of the magnetic head and the surface of the magnetic recording medium due to pits formed on the disk surface, the well-known spacing created based on the above-mentioned gap will occur. Magnetic recording and reproduction cannot be performed satisfactorily due to loss. Therefore, in the information signal recording and reproducing method using the capacitance change detection type recorded information recording medium disk of the present invention, the recording trace interval of the capacitance value change detection type recorded information recording medium disk is set to TP. , Se is the electrode width of the electrode for detecting changes in capacitance value.
w, the track width of the magnetic head for magnetic recording and reproduction is M t
When w is the recording trace interval TP of the capacitance value change detection type recorded information recording medium disk, the electrode width Saw of the capacitance value change detection electrode, and the magnetism for magnetic recording and reproduction. The relationship with the track width M t w of the head is Sew
<TP<Mtw<N-TP (where N is a positive integer of 2 or more), and the recorded tracking reference signal from the above-described capacitance value change detection type recorded information recording medium disc is being reproduced and the recording/reproducing element is being operated in the N-times speed reproduction mode while tracking control is being performed. This enables magnetic recording and reproduction of digital data to be performed satisfactorily using a magnetic head equipped with a magnetic air gap. FIGS. 8 and 9 illustrate the main components of the disc D in order to illustrate and explain the configuration principle of the information signal recording and reproducing method using the capacitance change detection type recorded information recording medium disc of the present invention. Sequential recording traces Tmo, Tml due to pits Pm, Pm- of the information signal. Tm2... and the tracking reference signal fP1. fP2
Sequential record trace by pits T t 11. T t 2
1. T t 12 . Sew is the recording trace interval of the main information signal recorded on the capacitance value change detection type recorded information recording medium disk, and Sew is the electrode width of the capacitance value change detection electrode E;
M tw is the track width of the magnetic head Mh for magnetic recording and reproducing, and is the track width of the magnetic head Mh for magnetic recording and reproducing, and the recording trace interval TP of the capacitance change detection type recorded information recording medium disk described above in FIGS. 8 and 9 and the static The electrode width Sew of the electrode for detecting changes in capacitance value and the track width M t w of the magnetic head for magnetic recording and reproduction
What is the relationship with? Sew(TP<Mtw<N-TP (however, N is a positive integer of 2 or more; Fig. 8 shows an example when N=2, and Fig. 9 shows an example when N=3). In the examples shown in FIGS. 8 and 9, the center line of the capacitance value change detection electrode E (electrode portion E) and the magnetic Both of the above are arranged so that the center line of the magnetic gap of the head Mh coincides with the center line of the magnetic gap of the head Mh. The above two may be arranged so that the distance from the center line of the magnetic gap of Mh is an integral multiple of the recording trace distance. While the recorded information signal is being reproduced in double speed reproduction mode by detecting changes in capacitance value, magnetically recording digital data on disk D or reproducing digital data from disk D. This is an example of a case where the information signal recorded on the disk D is reproduced in the triple speed reproduction mode by detecting a change in the capacitance value. This is an example of recording digital data magnetically or reproducing digital data from disk D. Pit Pm of the main information signal on disk D shown in FIGS. 8 and 9. Each recording trace originally includes a pit Pm of the main information signal, but in FIGS. 8 and 9, for the sake of simplicity, the pit Pm of the main information signal is Two parts of the pit Pm of the main information signal in each recording trace are omitted from illustration. The information signal in the recording trace Tm due to the pits of the main information signal is detected as a change in capacitance value, and the information signal is detected by the pits of the tracking reference signal provided on both sides of the recording trace Tm due to the pits of the main information signal. Tracking reference signal fpl in recording trace Tt. fp2 and specific radius position on disk D!i!!(
In FIGS. 2 and 3, the signal fp3 indicating the rotational phase of the disk D recorded during each vertical blanking period is recorded in the recording portion a near the Z-Z line position in the figures. is detected as a change in capacitance value, so that the tracking control circuit TSC in FIG. 1 performs tracking control on the recording/reproducing element RP based on the tracking reference signal reproduced as described above. A drive signal is supplied to the actuator ACT, and a control signal is also supplied to the transfer motor Mf. The recording/reproducing element RP is set to correctly track the recording trace to be reproduced, and the specific radius 'F! (In FIGS. 2 and 3, the signal fP3 indicating the rotational phase of the disk D recorded during each vertical blanking period recorded in the recorded portion a near the Z-Z line position in the figure) The control circuit OCT causes the recording/reproducing element RP to follow the trajectory shown by the solid line in FIG. 2 or 3, which has already been described. A kick pulse is generated to cause the recording and reproducing element RP to perform recording and reproducing by generating a kick pulse and supplying it to the actuator ACT of the tracking control system. When the recording and reproducing apparatus is performing recording and reproducing in the double-speed reproduction mode as shown in FIG. Trace TI! 11, when the disk D rotates once from that point on, the electrode portion E in the recording/reproducing element RP is on the recording trace Tm3 of the main information signal pit on the disk D, and furthermore, from that point on, When the disk D rotates once, the electrode portion E of the recording/reproducing element RP is placed at the recording trace Tm5 of the main information signal pits on the disk D. Further, when the recording and reproducing apparatus is performing recording and reproducing in the triple speed reproduction mode as shown in FIG. 9, at a certain point in time, l! Extreme part E is disk D
Assuming that the main information signal is recorded by the pit in the recording trace Tml, when the disk D rotates once from that point on, the electrode portion E in the recording/reproducing element RP will be located at the recording trace Tml by the pit of the main information signal on the disk D. Further, when the disk D has made one revolution from that point onward, the electrode portion E in the recording/reproducing element RP is placed at the recording mark Tm7 formed by the pit of the main information signal on the disk D. In this way, when the recording/reproducing apparatus is set to the double speed reproduction mode, as can be seen from FIG. When the recording/reproducing device is set to the triple-speed reproduction mode, the center position of the recording/reproducing element RP changes with each revolution of the disk, as shown in FIG. In general, when the recording/reproducing device is set to the N-times speed playback mode, such as 3 recording traces spaced apart, each of the D and C discs is
With each rotation, the center of the recording/reproducing element RP is spaced apart by N recording trace intervals, that is, by N-TP. Therefore, the track width M tw of the magnetic gap in the magnetic head Mh in the recording/reproducing element RP is equal to the recording trace interval T
Since the size can be increased to a size close to N times P, it becomes possible to perform magnetic recording and reproduction on the disk D favorably using the magnetic gap of the magnetic head Mh. This point will be explained as follows. That is, as mentioned above, in a disk configured such that a capacitance change detection type recorded information recording medium disk can be used for magnetic recording and reproduction, the surface of the disk D that the magnetic head slides on is Information signals can now be detected by changes in capacitance. Since the pits corresponding to the information signals are arranged, the magnetic recording ability of the information signals is reproduced using the magnetic layer formed on the disk D by the magnetic head that is brought into sliding contact with the disk surface. In this case, a spacing loss occurs between the magnetic gap of the magnetic head and the surface of the magnetic recording medium due to the gap formed by the pit formed on the disk surface. When [track rl of the magnetic gap in Mh] Mtw is increased to a dimension close to N times the recording trace interval TP, the range of the magnetic recording medium to be rapidly recorded and reproduced by the magnetic gap of the magnetic head Mh. Because of this, when looking at the track width direction of the magnetic gap in the magnetic head, it also includes the portion where no pits exist in the recording trace Tt due to the arrangement of pits of the tracking reference signal formed on the magnetic recording medium. In addition, the larger N is selected so that it spans more of the recording trace Tm by the pit arrangement of the main information signals, the more each of the main information signals Since the influence of the presence of pits in each recording trace due to the pit arrangement is averaged out, the method of the present invention makes it possible to perform magnetic recording and reproduction on the disk D favorably. In the information signal recording and reproducing method using the capacitance value change detection type recorded information recording medium disk shown in FIG. 1, the capacitance value is Magnetic recording and reproducing is performed using a recorded information recording medium disk (disk) that detects changes in capacitance value and is configured to enable magnetic recording and reproducing. When the operation mode is set to the above operation mode, the main information recorded on the disc D (no. 4 and the tracking reference signal are detected by changes in the capacitance value, and in the case of an operation mode in which digital data is recorded on the disk, the movable contact of the recording/reproducing switch SW is connected to the fixed contact R. When switched to the side, the digital data generated by the digital data processing circuit DDC is supplied to the magnetic head Mh in the recording/reproducing element RP, so that the digital data is magnetically recorded on the disk D. In addition, in the case of an operation mode in which digital data recorded on the disk D is reproduced, that is, when the movable contact of the recording/reproducing switch SW is switched to the fixed contact P side, the magnetic head Mh is transferred from the disk D to the magnetic head Mh. Therefore, the digital data reproduced from the C disk is signal-processed by the digital data processing circuit DDC and sent to the output terminal 20. In the digital data processing circuit DDC, the analog signal supplied to its input terminal 21 is is sampled and quantized by an analog-to-digital converter, and the output signal from the analog-to-digital converter is encoded. Then, digital data is generated by adding, for example, synchronization bits, parity pits, error detection words, etc. to the storage device. memorize it,
The data is read from the storage device at a predetermined time position and supplied to the magnetic head Mh in the recording/reproducing device RP via the fixed contact R and the movable contact of the recording/reproducing switch SW. The timing of reading the digital data from the storage device in the digital data processing circuit DDC is preferably such that the digital data is recorded in correspondence with the area Jy2B of the disk D. In the operation mode for reproducing digital data recorded on the disk D, the digital data reproduced from the disk D by the magnetic head in the recording/reproducing element RP is transferred between the movable contact and the fixed contact P of the D re-switching switch SW. The digital data is supplied to the digital data processing circuit DDC via the digital data processing circuit DDC, is stored in its storage device, and then, after error detection and other predetermined signal processing are performed on the digital data read out from the digital data, the data is stored on the time axis by the storage device. The signal is converted into a digital signal that is sent out at a fixed timing, and then converted into an analog signal by a digital-to-analog converter and sent out from the output terminal 20. Any information signal can be magnetically recorded and reproduced by the disk D as digital data, but if it is, for example, an audio signal, high-fidelity PCM recording and reproduction can be performed by magnetic recording and reproduction. (Effects of the Invention) As is clear from the above detailed explanation, the method for recording and reproducing information signals using the capacitance value change detection type recorded information recording medium disc of the present invention is effective for recording recorded information signals. and a recorded tracking reference signal are performed by detecting changes in capacitance value, and is also configured to enable magnetic recording and playback. A method for recording and reproducing information signals using a recorded information recording medium disk, wherein the recording trace interval of the above-mentioned capacitance value change detection type recorded information recording medium disk is set to TP, and for detecting changes in capacitance value. Sew the electrode width of the electrode,
The track width of the magnetic head for magnetic recording and reproduction is M tw
Then, the recording trace interval TP of the capacitance value change detection type recorded information recording medium disc, the electrode width Sew of the capacitance value change detection electrode, and the magnetic head for magnetic recording and reproduction. The relationship with the track width Mtw is set as S a w <'rp <Mtw '<N-TP (where N is a positive integer of 2 or more), and
When the above-mentioned reproduction operation by detecting a change in the capacitance value of a recorded information signal from the capacitance value change detection type recorded information recording medium disk is performed in the N times speed reproduction mode, the capacitance value Since magnetic recording and reproduction are performed by a magnetic head equipped with a magnetic gap located a predetermined distance from the position of the change detection electrode, the capacitance value of the present invention is In an information signal recording and reproducing method using a change detection type recorded information recording medium disc, pits corresponding to the information signal are arranged so that the information signal can be detected by a change in capacitance value. Recorded information recording medium disc (with change detection type of capacitance value)
A magnetic head is placed in sliding contact with the surface of the disk D, and a magnetic layer is formed on the disk D by the magnetic head that is in sliding contact with the disk surface. When recording and reproducing information signals magnetically using a magnetic disk, the pits formed on the disk surface cause a spacing loss between the magnetic air gap of the magnetic head and the surface of the magnetic recording medium. Also, as described above, the magnetic head M of the recording/reproducing element RP
By increasing the track width M t w of the magnetic gap at h to a dimension close to N times the recording trace interval TP, the range of the magnetic recording medium to be recorded and reproduced by the magnetic gap of the magnetic head Mh is increased. Because of the large amount of
Looking at the track width direction of the magnetic gap in the magnetic head, magnetic recording and reproduction is performed including the portions where there are no pits in the recording trace Tt formed by the arrangement of pits of the tracking reference signal formed during magnetic recording and reproduction. In addition, the larger N is selected so that it spans many of the recording traces Tm by the pit arrangement of the main information signals, the more each recording trace by the pit arrangement of each main information signal. Since the influence of the presence of pits on the disc D is averaged out, the method of the present invention makes it possible to perform magnetic recording and reproduction on the disk D favorably. According to the method of the present invention, the interlayer points mentioned above The M decision is made well.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of an information signal recording and reproducing method using a capacitance change detection type recorded information recording medium disc of the present invention, and FIGS. 2 and 3 are diagrams for double-speed reproduction. FIG. 4 is a plan view showing the locus of the reproducing element, FIG. 4 is a signal arrangement diagram, each (a) in FIGS. 5 and 6 is a perspective view of the recording and reproducing element, and each (b) in FIGS. FIG. 3 is a plan view of a sliding surface of a recording/reproducing element. D... The reproduction of the recorded information signal and the reproduction of the recorded 1 to racking reference reference bone are performed by detecting changes in capacitance value, and also configured to enable magnetic recording and reproduction. Recorded information recording medium disk (disk) that detects changes in capacitance value, Md...drive motor, TT...turntable, C...clamper, DSC...disk servo circuit, RP ...recording/reproducing element, E...electrode section, Mh...magnetic head, Se
w... Electrode width, M t w... Magnetic gap, TP.
...Record interval, ACT...actuator, Mf.
...Motor for transfer, FA...Transfer body, ○P...Operation unit, DDC...Digital data processing circuit, SW...
・Recording/reproducing switch, PrA... Preamplifier for the signal detected as a change in capacitance value by the electrode section E in the recording/reproducing element RP, OCT... Control circuit, SDC
...Signal processing circuit, TSC...Tracking control circuit, Pm...Pit formed on the disk surface by the main information signal, Ptl...Pit formed on the disk surface by the tracking reference signal fpl ,
Pt2...pits formed on the disk surface by the tracking reference signal fp2, Tm...recording traces,
Tt...Tracking reference signal f pi, f p2
Record traces of pits Ptl and Pt2, 1, 2...
Glass support plate, 3... Thin film made of ferromagnetic material, 4
゜5... Coil of the magnetic head, 6... Support part made of insulator for forming the electrode part E, 7... Terminal connected to the electrode part E, 8... Coil of the magnetic head terminal,
9... Magnetic gap of magnetic head, 10... Glass plate,
DESCRIPTION OF SYMBOLS 11... Ferrite substrate, 12.13... Glass support plate, 14... Rotating shaft of transfer motor Mf, 1
5...Reducer, 16...Feed screw, 17...Guide rod, 18-21...Terminal. Patent Applicant: Victor Company of Japan Co., Ltd. 21 Figure % 9 Figure Procedure Correction Band C'jf January 28, 1981 Commissioner of the Patent Office Black 1) Akio Tono 1, Change Detection Type Record of Displayed Capacitance Value of Incident Recording and reproducing of information signals using a previously used information recording medium disk m^Hiro 1゛3, Relationship with the case of the person making the amendment Patent Applicant Address 3-12 Moriya-cho, Kanayō-ku, Yokohama-shi, Kanagawa Prefecture Name (432) ) Japan Victor Co., Ltd. 4, agent address East)
No. 5 Facsimile 03 (472) 2257 No. 5, date of amendment order: January 7, 1985 (shipping date: January 2, 1988)
7th) 6. In column 7 of the brief explanation of the drawings of the specification subject to amendment, on page 40, line 19 of the statement of contents of the amendment, "is" is amended as follows.

Claims (1)

[Claims] 1. Reproduction of recorded information signals and reproduction of recorded tracking reference signals are performed by detecting changes in capacitance value, and magnetic recording and reproduction are also possible. A method for recording and reproducing information signals using a capacitance value change detection type recorded information recording medium disc configured, the recording trace of the capacitance value change detection type recorded information recording medium disc described above. When the interval is TP, the electrode width of the capacitance value change detection electrode is Sew, and the track width of the magnetic head for magnetic recording and reproduction is Mtw, the above-mentioned capacitance value change detection type recorded information recording Media disk recording trace interval TP
The relationship between the electrode width Sew of the electrode for detecting changes in capacitance value and the track width Mtw of the magnetic head for magnetic recording and reproduction is expressed as Sew<TP<Mtw<N・TP (where N is 2 or more). (a positive integer), and the playback operation by detecting the change in capacitance of the recorded information signal from the capacitance change detection type recorded information recording medium disc described above is performed at N times the speed. An electrostatic device that performs magnetic recording and reproducing using a magnetic head equipped with a magnetic gap that is located a predetermined distance from the position of the electrode for detecting changes in capacitance value when the electrostatic capacitor is in the electrostatic mode. Information signal recording/reproducing method 2 using a capacitance change detection type recorded information recording medium disc, a state in which the center line of the capacitance change detection electrode and the center line of the magnetic gap of the magnetic head coincide Information signal recording and reproducing method 3 using a capacitance value change detection type recorded information recording medium disk according to claim 1, in which both of the above are arranged, for detecting a capacitance change change. Claim 1, wherein the electrodes are spaced apart from each other so that the distance between the center line of the electrode and the center line of the magnetic gap of the magnetic head is an integral multiple of the recording trace distance. Recording/reproducing method of information signals using a recorded information recording medium disk that detects changes in capacitance value 4. During magnetic recording/reproduction, a non-recorded portion formed by a magnetic gap of a magnetic head detects a change in capacitance value. Claim 1: The detection type recorded information recording medium disk is formed in a portion of a recording trace caused by a recorded information signal.
A method for recording and reproducing information signals using a recorded information recording medium disk of a capacitance value change detection type described in 2.