JPS60261077A - Recording system of signal to information recording medium disc possible for repetitive recording - Google Patents

Abstract

PURPOSE:To attain ease of recording and reproduction by recording a main signal, a chapter signal and a data such as an accumulated time reproduced from a pilot signal recording track into a main signal recording track, and recording a lead-out signal only when it is reproduced from the pilot signal recording track. CONSTITUTION:In bringing a recording and reproducing device to the recording mode, a control signal from a control section 12 is inputted to a carrier device 11, which moves sequentially a recording/reproducing head 10 from a lead-in signal recording area of a recording disc D to a main signal recording and reproducing area. The device is brought temporarily into a reproducing state during that time, reads a lead-in signal such as a chapter number and data of the accumulated time recorded in a lead-in signal area, stores it to a memory of a control section 12 via a reproducing circuit 17, records it to the main signal recording track together with the main signal from an input terminal 14, and when a lead-out signal is reproduced from the recording track by the pilot signal for tracking, only the signal is recorded to the main signal recording track. Thus, the recording and reproduction is attained easily.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is provided with a recording layer that enables erasing of previously recorded information and allows information signals to be repeatedly recorded and reproduced. Recording/reproducing operation at a constant linear velocity is controlled based on a reproduction signal from a recording trace using a pilot signal for spiral tracking, which has been set in advance in a manner that cannot be erased by changing the geometric shape. The present invention relates to a method for recording information signals on an information recording medium disc during operation.

(Conventional Techniques) In recent years, as the demand for high-density recording and reproduction of information signals has increased in various technical fields, attempts have been made to record and reproduce information signals at high-density using various types of information recording media. .

Now, ferromagnetic media has traditionally been used as an information recording medium on which information signals can be easily recorded and reproduced, and the recorded information signals can also be easily erased and the information signals re-recorded (re-written). Magnetic recording media with a general structure including a recording layer made of materials have been used for a long time, but recently, magnetic recording media that can be recorded, reproduced, and re-recorded have been developed by applying electromagnetic waves, electric fields, etc. By heating etc.
Materials in which a phase change from an amorphous state to a crystalline state or a phase change cloth from a crystalline state to an amorphous state occur, e.g.
An information recording medium with a recording layer made of TeOx) on a substrate, or a magnetic thin film (
For example, an information recording medium in which a recording layer made of a magnetic thin film of materials such as TbFe, GdTbFe, or GdCo is formed on a substrate is used to record information signals that were previously performed using a general magnetic recording medium. Compared to recording and playback,
Attempts have also been made to record and reproduce information signals at even higher recording densities.

Incidentally, in order to successfully perform high-density recording and reproduction of information signals, the interval between recording traces (track pitch) must be made narrow, but when the track pitch is made narrow, the recording element, the reproduction element, or Since it is difficult to make the recording/reproducing element accurately track the recording trace on the information recording medium, attempts have been made to solve this problem by applying various tracking control means. However, as recording density becomes even more sophisticated, extremely high mechanical precision is required for the recording mechanism in order to prevent overlapping recording traces during recording, which makes the device significantly more expensive. The problem is that it becomes.

As a means to solve the above-mentioned problems, information recording medium has been conventionally used in a disc-shaped information recording medium (information recording medium disc) in which information signals are recorded and reproduced using a minute spot of light. A guide groove for generating a tracking reference signal used in a tracking control operation to be performed either when recording an information signal on the recording layer of the medium disk, or when reproducing the information signal from the recording layer, or both. It has been proposed to configure the information recording medium disc in advance in a non-erasable manner.

In addition, for high-density recording of information signals on an information recording medium disk, recording and reproduction of information signals is performed at a constant linear velocity (CLV).
In this case, a rotation synchronization signal (or speed control signal) is used to enable the information recording medium disc to perform recording and reproduction at a constant linear velocity. It has been proposed in the past to record a signal such as the above-mentioned tracking reference signal in a fixed manner (in an unerasable manner) in the guide groove for generating the tracking reference signal. In the information recording medium disk of As an information recording medium disk that does not have the above-mentioned problems, the company is equipped with a recording layer that allows erasing of previously recorded information and allows the information signal to be repeatedly recorded and reproduced, as well as a certain level of protection against the recording traces of the main signal. A control operation based on a reproduction signal from a recording trace by a pilot signal for spiral tracking, in which the recording and reproduction operation at a linear velocity is set in advance in a manner that cannot be erased by changing the geometric shape. Each of the above-mentioned aspects of an information recording medium disk is configured such that the lead-in signal area, the main signal recording/reproducing area, and the lead-out signal area are arranged side by side on the disk surface. A rotation synchronization signal is included at a predetermined interval in the recording trace created by the pilot signal for spiral tracking over all areas of the area, and furthermore, the recording trace created by the pilot signal for spiral tracking described above is included at predetermined intervals. The part of the trail other than the lead-out signal area also includes data of cumulative time values, and furthermore, the lead-out signal area of the recorded trail by the spiral pilot signal for tracking described above includes the lead-out signal. The present invention provides an information recording medium disk which includes a disk, and satisfactorily solves the above-mentioned problems of the conventional disk.

(Problems to be Solved by the Invention) However, as described above, the information recording medium disc proposed by the applicant company has a do-in signal area, a main signal recording/reproducing area, and a lead-out signal area on the disc surface. The areas #L are provided in a hidden manner, and a rotation synchronization signal is included at a predetermined interval in the record trace of the pilot signal for spiral tracking over all areas in each of the above-mentioned areas. Furthermore, data of cumulative time values are also included in the part other than the lead-out signal area in the record trace of the pilot signal for spiral tracking described above. This is a completely new type of repeatedly recordable information recording medium disc, in which the lead-out signal area in the recording trail created by the tracking pilot signal contains the lead-out signal. Recording of information signals that facilitates recording and reproducing operations by effectively utilizing various information signals pre-recorded in recording traces by pilot signals for tracking when recording information signals on an information recording medium disc. A method was devised.

(A last resort to solve the problem) The present invention allows erasure of previously recorded information.

A recording layer that is capable of repeatedly recording and reproducing information signals is provided, and the recording and reproducing operation at a constant linear velocity with respect to the recorded trace of the main signal cannot be erased due to a change in the geometric shape. The control operation is performed based on the reproduction signal from the recording trace by the spiral pilot signal for tracking provided in advance in the board number; the lead-in signal area and the main signal recording and reproduction. In an information recording medium disc in which an area and a lead-out signal area are provided side by side, a predetermined interval is formed in the recording trace by the pilot signal for spiral tracking over all of the areas described above. In addition, data on cumulative time values are also included in the area other than the lead-out signal area in the recording trace by the spiral tracking signal. Furthermore, there is provided a method for recording information signals on an information recording medium disk, wherein the lead-out signal area in the recording trace by the pilot signal for spiral 9 tracking includes a lead-out signal, When recording the main signal to be recorded in the main signal recording/playback area, the main signal, the chapter number input corresponding to the main signal, and the recording trace of the pilot signal for tracking are used. A signal obtained by decoding the accumulated time value data of the position where the reproduced information signal is to be recorded is recorded as a recording signal in the main signal recording trace, and a lead-out signal is generated from the recording trace by the pilot signal for tracking. The present invention provides a signal recording method on a repeatedly recordable information recording medium disc in which only a lead-out signal is recorded on the main signal recording trace when reproduced.

(Example) Hereinafter, with reference to the attached drawings, repeatedly recordable information ii1 of the present invention! The specific details of the method for recording signals on the recording medium disc will be explained in detail.

FIG. 1 shows how to record an information signal onto a repeatedly recordable information recording medium disk by applying the signal recording method to a repeatedly recordable information recording medium disk according to the present invention, and to record a repeatedly recordable information recording medium disk. FIG. 2 is a block diagram of a recording and reproducing device used to reproduce a sapphire signal from a medium disc.

In FIG. 1, 5 is a motor that drives and rotates the information recording medium disc, 6 is the rotating shaft of the motor, 7 is a turntable, and 8 is a clamper, which separates the information recording medium fixed to the turntable 7 by the clamper 8. Disk D is driven by a motor 5 which is driven and rotated by driving power supplied from a motor drive control circuit 9, and the information recording medium disk is connected to its recording (reproducing) surface and a recording (reproducing) laser beam. The light spot is rotated in such a manner that the relative velocity of the light spot always exhibits a predetermined constant linear velocity.

The motor drive control circuit 9 described above is obtained by comparing the rotation synchronization signal Sr read from the record trace of the tracking pilot signal on the information recording medium disc as described later with a reference signal. Driving power is generated and supplied to the motor 5 so that the information recording medium disc is driven and rotated at a rotation speed such that the error signal becomes zero.

Reference numeral 10 denotes an optical recording/reproducing head, and the optical recording/reproducing head 10 is transported by a transport mechanism 11 in the radial direction of the information recording medium disc. The transport mechanism 11 moves the optical recording/reproducing head 10 in a direction and at a moving speed determined by a control signal supplied from the control section 12 in accordance with an operation code set in the input section 13 of the recording/reproducing apparatus. It makes it worse. In the control unit 12,
In addition to the above-mentioned transfer mechanism 11, necessary control signals are supplied to the above-mentioned motor drive control circuit 9 and other components for each operation mode set by the input section 13.

The optical recording/reproducing head 10 described above includes a recording/reproducing laser drive circuit 10a, a recording/reproducing laser 10b, a collimating lens 10c, an lOi, and a correction element 10 for the cross-sectional shape of the laser beam.
d, 10h, diffraction grating 10e, polarizing prism 10f,
1/4 wavelength plate 10g+10fi, erasing laser 10j
.

A dichroic mirror 1 is included in the erasing laser drive circuit 10.
0m, a condenser lens 10n9, a cylindrical lens 10o, a light receiving section 10P consisting of a plurality of light receiving elements, and an objective lens 10q.

1, which is composed of an actuator 10r, etc.
4 is the Kugata terminal of the information signal to be recorded, 15
is an encoder, 16 is a recording circuit, 17 is a playback circuit, 18
19 is a tracking control circuit, 19 is a focus control circuit,
20 is a reproduction signal output terminal.

When the operation mode of the recording/reproducing apparatus is set to recording mode, the recording/reproducing laser 10b in the optical recording/reproducing head 10 and the laser beam emitted from the recording/reproducing laser 10b have different wavelengths. When both the erasing laser 10j and the erasing laser 10j that emit the laser beam are in a light emitting state, and the operation mode of the recording/reproducing apparatus is set to the reproduction mode, the optical recording/reproducing head lO
Only the recording/reproducing laser 10b in is set to a light emitting state,
The erasing laser 10j is left unused. In addition,
The light emission output of the recording/playback laser 10b in the reproduction mode is controlled to be smaller than the light emission output of the recording/playback laser 10b in the recording mode.

When the operation mode of the recording/reproducing device is set to the recording mode, the laser beam emitted from the erasing laser lOj is transmitted as follows: erasing laser 10j→collimating lens 10i→
Laser beam cross-sectional shape correction element 10h → polarizing prism 10f → quarter wavelength plate 10Q → dichroic mirror 10
m → 1/4 wavelength plate 10Q → polarizing prism 10f → 1/4
Wave plate 10g → Objective lens 10q → Information recording medium disk D
→Objective lens 10q-+1/4 wavelength plate 10g→Polarizing prism 10f→Diffraction grating 10e→Correction element 10d for the cross-sectional shape of the laser beam→Collimating lens 10c→In the middle of passing through the path, information is recorded. As shown by the symbol Eb in FIG. 6, the recording layer of the medium disk is irradiated with a spot of an erasing laser beam having a long cross-sectional shape in the direction in which the recording trace extends. Prior to recording an information signal using a small diameter laser beam spot with a circular cross section for recording, which is indicated by the symbol Lb2, the previously recorded information in the main signal recording trace of the information recording medium disk is erased. (In Fig. 1, the path of the reflected light from the information recording medium disk by the erasing laser beam is omitted to avoid the complexity of the illustration. When a magnetic material on which thermomagnetic recording is to be performed is used as a constituent material of the recording layer, the cross-sectional shape of the laser beam spot of the erasure moon may be circular).

When the recording/reproducing apparatus is set to the recording mode according to the operation mode set in the human power section 13, the control section 12 sends the line 2
6 to the erasing laser drive circuit 10k of the optical recording/reproducing head 10, the erasing laser 10j is brought into the emitting state as described above, and the green portion of the information recording medium disc is illuminated. At the same time, the control unit 12
By the control signal supplied to the recording/reproducing laser drive circuit 10g of the optical recording/reproducing head 10 via the line 27,
The light emission output of the recording/playback laser 10b is made large enough to have the intensity required during recording, and a signal from the encoder 15 is supplied to the recording/playback laser drive circuit 10a via the line 28, Laser light emitted from the laser 10b is transmitted from the encoder 15 to the recording/reproducing laser drive circuit 10a.
The intensity is modulated by the signal supplied to the signal.

Now, when the recording and reproducing apparatus is set to the recording mode according to the operation mode set in the input section 13, the laser beam emitted from the recording and reproducing laser 10b changes from the recording and reproducing laser 10b to
The laser beam of 0th order diffracted light (6 A laser beam that produces a recording light spot as shown by Lb2 in the figure) and a laser beam of ±1st order diffracted light (as shown by Lbl and Lb3 in Fig. 6) are applied to the information recording medium disk. A laser beam that produces a tracking light spot (as will be clear from the description below, the light spot Lbl on the information recording medium disk is also used to read the tracking pilot signal). total of 3
Generates a book laser beam.

The three laser beams generated from the diffraction grating 10e- as described above are transferred from the polarizing prism 10f to the quarter-wave plate 10.
After passing through the path of the g4 objective lens 10q, the arrow R in FIG.
As shown in FIG. 6, three light spots Lb are placed on the recording surface of the information recording medium disc rotating in the direction of
l, Lb2. Lb3 is generated, but the recording trace of the main signal on the information recording medium disk is marked with the symbol L in FIG.
The information signal to be recorded is recorded by a small diameter recording laser beam spot with a circular cross section indicated by b2, and in FIG.
Two small diameter laser beam spots with a circular cross section, indicated by Lb3, are positioned at the boundary between the recording trace of the pilot signal for tracking and the recording trace of the main signal, thereby generating a tracking reference signal. The two small diameter laser beam spots Lbl,
Among Lb3, the laser beam spot Lbl that is ahead of the laser beam spot Lb2 used for recording the information signal targeted for recording is recorded in the recording trace by the pilot signal for tracking. It is also used for reading out the information signals (various signals forming the signal section Sa, which will be described later with reference to FIG. 5). The reflected light from the three laser beam spots Lbl to Lb3 generated on the information recording medium holiday ff1D by the three laser beams generated is as follows: objective lens 10q→1/4 wavelength plate Log→polarizing prism 10f-) 174 After passing through the path of wavelength plate 1012 → dichroic mirror 10m → condenser lens 10r1 → cylindrical lens 10°, the light receiving section top consisting of a plurality of light receiving elements
given to.

In the light receiving section 10p, a tracking error signal obtained based on the output signal of a light receiving element that individually photoelectrically converts the reflected light from the laser beam spots Lbl and Lb3 on the information recording medium disc is sent to a tracking control circuit via a line 21. 18
and an information signal obtained from a signal obtained by photoelectrically converting the reflected light from the laser beam spot Lbl (various signals forming the signal section Sa, which will be described later with reference to FIG. 5).
is applied to the recording circuit 16, the tracking control circuit 18, and the motor drive control circuit 9 via the line 22, and the focus error obtained from the signal obtained by photoelectrically converting the reflected light from the laser beam spot Lb2 by a plurality of light receiving elements. The signal is applied to focus control circuit 19 via line 23.

Figures 2(a) and 2(b) show a substrate of an information recording medium whose geometrical shape has been changed in advance by a non-erasable AM using a spiral tracking pilot signal. , recording, playback, and erasing are possible and re-recorded @
(rewriting) and recording information signals at a high recording density (for example, a phase change from an amorphous state to a crystalline state).

Or a recording layer made of a material (TeO) that undergoes a phase change from a crystalline state to an amorphous state.

A magnetic N film (e.g. TbFe
, GdTbFe, GdCo, etc.
1! Note #1 layer) according to J) is applied, the recording and reproducing operation at a constant linear velocity with respect to the recorded trace of the main signal is caused by a change in the geometrical shape, resulting in an unerasable M-like pattern. A plane of an information recording medium disc on which an information signal is to be recorded in the recording method of the present invention, which is performed under a control operation based on a reproduction signal obtained from a recording trace by a spiral tracking pilot signal provided. 2, where D is the overall code of the information recording medium disk, 1 is the center hole, 2 is the lead-in signal area, 3 is the main signal recording and reproducing area, 4 is a lead-out signal area.

In the information recording medium disk on which the information recording signal is to be recorded in the recording method of the present invention shown in FIGS. 2(a) and (b), one of the information recording medium disks is shown in FIG. 2(a). The information recording medium disc shown in FIG. A configuration example is shown, and the other
The information recording medium disk shown in FIG. An example of the configuration is shown in which they are respectively provided on the inner circumferential side.

In addition, in the information recording medium disc described above, the recording trace created by the spiral tracking pilot signal, which is provided in advance in an unerasable manner by changing the geometric shape, is It is provided over all areas of the lead-in signal area 2, main signal recording/reproducing area 3, and lead-out signal area 4 in the disc, and in the information recording medium disc, the spiral-shaped In order to reduce the amount of crosstalk of the pilot signal that crosstalks to the record trace of No. 141 that is sandwiched between the record traces of the tracking pilot signal, the spiral tracking pilot signal described above is used. The recording trace rl-+ W p (see Figure 3 or Figure 6) of the recording trace by the signal is 40 of the recording trace interval TP (see Figure 6 for part b in Figure 3) on the information recording medium disk.
6. Figure 4 shows the record trace r of the spiral tracking pilot signal in the information record@medium disk described above.
This figure is used to explain the reason why it is desirable to set lJWp to 40% or less of the recording trace interval TP in gLD for information recording media as described above, and this figure is for spiral tracking. The recording trace of the main signal sandwiched between the recording traces of the pilot signal for spiral tracking described above is Wm, and the information recording medium disc is Wp. When the distance between recording traces is TP=Wm+Wp and the diameter d of the light spot for recording and playback satisfies the relationship d<Wm, the I trace of the recording trace by the pilot signal for spiral tracking is With respect to the change in the value of the ratio Wp/TP between the width Wp and the recording line interval TP of the information recording medium disk,
This figure shows how the amount of crosstalk of the tracking pilot signal that crosstalks to the main signal changes. When the above-mentioned W p /TP value is 0.4 or less, Experimental results have revealed that the influence of crosstalk of the pilot signal does not pose a practical problem.6 Figures 3 and 6 are enlarged plan views of a portion of the information recording medium disk described above. , In Figures 3 and 6, the hatched portion at the bottom right is erased by changing the geometric shape of the pilot signal for tracking in the signal form described later. In an invisible manner, it represents the bit part and groove part pre-formed on the board, and the hatched part at the bottom left in Figs. 3 and 6 is the light spot. 7. In addition, in FIGS. 3 and 6, the portion other than the portion indicated by diagonal lines downward to the right is considered to be a land portion.

FIG. 5 is a schematic diagram for explaining the signal form of a pilot signal for tracking. In FIG. In addition, FIG. 5(b) shows a specific example of the structure of a unit block signal in a tracking pilot signal.

In the information recording medium disc described above, as described above, a spiral record mark created by the pilot signal for 1-racking is created in advance in an unerasable manner by changing the geometric shape. The information recording medium is provided over the entire area of the disk, that is, the lead-in signal area 2, the main signal recording/reproducing area 3, and the lead-out signal area 4. A record trail is not provided by a tracking pilot signal having the same signal configuration for each region.

In other words, in the information recording medium disc described above, the signals to be recorded in the recording trace by the spiral tracking pilot signal, which is set in advance in an unerasable manner by changing the geometric shape, are completely A tracking information signal recorded in the form of a substantially continuous groove over the area, a rotation synchronization signal recorded at regular intervals over the entire area, and an area other than the lead-out signal area 4 (
The cumulative time value data is recorded in the area between the lead-in signal area 2 and the main signal recording/reproducing area 3, and the lead-out signal (go-home signal) is recorded in the lead-out signal area 4. The signals recorded in the recording trace of the spiral tracking pilot signal provided over all of the above-mentioned areas on the information recording medium disc are all in the same signal form for all areas. It is not being done.

Now, in FIG. 5(b) illustrating a unit block signal used to configure a pilot signal for tracking, the unit block signal is a synchronization bit sb,
Although an example is shown in which the rotation synchronization signal Sr, cumulative time value data SL, and continuous signal section Sc are configured, the unit block signal may be configured in any configuration. are the continuous signal part Sc and the other signal part Sa (in the example of the signal configuration in FIG. By the signal (No. 1 part S
The length L of one unit of the block signal consisting of the two signal parts Sa and Sc described above is determined by the length L of the information recording medium disk. It is always constant even in parts.

Two signal parts Sa forming a unit block signal,
In Sc, the synchronization bit Sb in the signal section Sa is
The synchronization code is expressed by a predetermined plurality of bits, and the rotation synchronization signal Sr is, for example, an impulse in a predetermined pulse, and the cumulative time value data St is a lead-in signal. The boundary transitioning from area 2 to main signal recording/reproducing area 3 is taken as the reference time position of cumulative time 0, and from the reference time position to the main signal recording/reproducing area 3 side, a positive cumulative time value is indicated. At the same time, a numerical signal indicating a negative cumulative time value from the reference time position to the lead-in signal area 2 side is used (the recorded signal in the lead-in signal area 2 (Details of the content will be described later with reference to FIG. 7).

The above-mentioned synchronization bit sb, rotation synchronization signal Sr, accumulated time value data St, etc. are recorded on the surface of the substrate of the information recording medium disc as bits corresponding to the above-mentioned signals.

Two signal parts Sa forming a unit block signal,
Is the continuous signal portion Sc in Sc a continuous long groove on the surface of the substrate of the information recording medium disc? Till! It will be recorded.

As mentioned above, on the surface of the substrate of the information recording medium 11D on which the recording trace of the tracking pilot signal is recorded by the bits and long grooves corresponding to the tracking pilot signal consisting of the two signal parts Sa and Sc. , a recording layer that can be recorded, reproduced, erased, re-recorded (re-written), and capable of recording information signals at a high recording density (for example, a phase change from an amorphous state to a crystalline state, or from a crystalline state to a non-crystalline state). Materials that undergo a phase change to the crystalline state (TeO
x), or a magnetic recording layer (for example, T b Fe , G d T
b) An information recording medium disc is formed by coating the recording layer with a magnetic thin film (made of a material such as Te or Gdco).

The record trace of the pilot signal for tracking shown in FIG.
The portion of the recording trace formed by the tracking pilot signal, which is constituted by both the bits formed by Sc and the long groove formed by the continuous signal section Sc, is shown.

FIG. 7 is a diagram used to explain the contents of the signal in the recording trace by the pilot signal for tracking in the lead-in signal area 2. In FIG. The code that distinguishes the two areas in the in-signal area 2, 0, is the code that indicates the boundary between the lead-in signal area-2 and the main signal recording and reproducing area 3, and the introduction vertical line in the figure indicates the extension of the recording trace. This is the line shown in the direction of

In FIG. 7, the recording trace by the tracking ρ pilot signal in area 2a of the lead-in signal area 2 and the recording trace by the tracking pilot signal in area 2b of the lead-in signal area 2 are respectively recorded. Each of the tracking pilot signals used in the system has different signal formats.

That is, in a tracking pilot signal consisting of two signal parts, the signal part Sa and the continuous signal part Sc, the signal part Sa is recorded in the area 28 of the lead-in signal area 2. A tracking pilot signal consisting only of the rotation synchronization signal Sr is used, and as a tracking pilot signal recorded in the area 28 of the lead-in signal area 2, the signal portion Sa includes the synchronization bit sb and the rotation synchronization signal. S' and cumulative time value data St are used, and the position of the boundary between the area 2a and the area 2b described above is used as the start point for rewriting the lead-in information.

Now, when input information for setting the recording and reproducing apparatus to the recording mode is given to the input section 13, the control section 12 causes each component of the recording and reproducing apparatus to sequentially perform operations required in the recording mode. A control signal is generated that enables the recording and reproducing apparatus to perform a recording operation, which is supplied to each component of the recording and reproducing apparatus.

When the recording/reproducing apparatus is put into the recording mode, a control signal generated by the controller 12 is supplied to the transport mechanism 11 via the line 30, so that the transport mechanism 11 moves the optical recording/reproducing head 10 to the home position. From the position of , a laser beam spot Eb is formed in the area 2a of the lead-in signal area 2 on the information recording medium disc.

The laser beam spots Eb and Lbl to Lb3 are moved to a position where Lbl to Lb3 are positioned vertically, and then the laser beam spots Eb and Lbl to Lb3 are sequentially moved from the area 2b of the lead-in signal area 2 in the information recording medium fiD to the main signal recording and reproducing area 3. The optical recording/reproducing head 10 is moved so that it is in a state where it is moving. During the period in which the recording mode is started and the laser beam spots Eb and LbliLb3 are positioned in the lead-in signal area 2 on the information recording medium disc, the recording and reproducing apparatus is temporarily in the reproducing state. Then, the lead-in signal based on data such as the chapter number and cumulative time value recorded in the area 2a of the lead-in signal area 2 is read out and stored in the memory of the control unit 12 via the reproduction circuit 17. In addition, the control unit 12 uses the data of the cumulative time value read out as described above to place a laser beam spot FEb, Lbl to Lb on the recording start portion following the recorded portion in the main signal recording/reproducing area 3.
A control signal is given to the transport unit 11 to quickly move the optical recording/reproducing head 10 so that the optical recording/reproducing head 10 can be positioned.

When the recording/reproducing apparatus is put into the recording mode, the optical recording/reproducing head 10 moves from the home position to lI1. Area 2 of lead-in signal area 2 in D
a, the laser beam spots IEb, Lbl to Lb3 can be positioned in the information recording medium g1. As described above, the pilot signal read out from the region 2a in D from the #l trace of the tracking pyroramie signal is divided into two <n band portions, (y) band portion SQ and continuous signal portion Sc. Lead-in signal area 2 on the information recording medium disc
The pilot signal recorded in the trace of the tracking pilot signal existing in the region 2a is as follows.

Since the signal portion Sa is in the form of a signal consisting only of the rotation synchronization signal Sr, the laser beam spots Eb, L bl ~ In the state where Lb3 is located, the rotation synchronization signal Sr is read out by the laser beam robot Lbl from the record trace of the tracking pilot signal (the tracking pilot signal in the area 2a of the lead-in signal area 2). Among the signals recorded in the recording trace by
However, if a signal composed of a rotation synchronization signal Sr and a lead-in signal is used, the lead-in signal can be searched quickly.)

When the recording/reproducing apparatus is put into the recording mode, the motor drive control circuit 9 to which a control signal is supplied from the control section 12 via the line 31 controls the motor 5 to rotate at a predetermined initial rotational speed. Then, the laser beam spots Lbl to Lb3 are positioned in the area 2a of the lead-in signal area 2 on the information recording medium disk.

When the rotation synchronization signal Sr is read by the laser beam spot Lbl, it is supplied from the light receiving section 10p to the motor drive control circuit 9, and the motor drive control circuit 9 reads the rotation synchronization signal Sr and the reference signal supplied thereto. In comparison, the rotational speed of the motor 5 is controlled so that the period of the rotation synchronization signal Sr read by the laser beam spot Lbl is always constant, and the relative relationship between the 1 noser beam spot and the information recording medium @D is controlled. To ensure that the linear velocity is always kept at a predetermined constant velocity.

The optical recording/reproducing head 10 is transported by the transport mechanism 1, and the laser beam spot is positioned within the information recording medium! i
Area 28 and area 2 of lead-in signal area 2 at tD
Area 2b beyond the lead instar 1 part of the boundary with b
When moving to , the pilot signal read from the record trace of the pilot signal for 1 to racking in the area 2b has a <i band Sa of the 1 rotation synchronization signal Sr and the data St of the negative cumulative time value. and the rotation synchronization signal S
r is supplied to the motor drive control circuit 9 and used to control the rotational speed of the motor 5, and the data St of the negative cumulative time value is used in the control section 12 to generate a control signal. .

In addition, all of the main signal recording traces in area 2b in lead-in signal area 2 include a chapter number corresponding to the recording content recorded at the end of the previous recording operation and a cumulative time value corresponding to the recording area. , etc. are recorded, the optical recording/reproducing head 10 is moved by the transport mechanism 11, and the position of the laser beam spot moves within the area 2b of the lead-in signal area 2 on the information recording medium disc. From the main signal recording trace in area 2b, a lead-in consisting of the chapter number and recording area number corresponding to the recording content recorded at the end of the previous recording operation; the corresponding cumulative time value data, etc. The signal is read out, supplied to the control unit 12 via the reproduction circuit 17, and stored in the memory.

The control unit 12 uses the cumulative time value data corresponding to the recording area during the previous recording operation to determine the main signal recording/reproducing area in the information recording medium disk where signal recording should be started during the current recording operation. The optical recording/reproducing head 10 is moved by the transport mechanism 11 so that the laser beam spot is positioned at the 3rd digit, and then the optical recording/reproducing head 10 is placed in a standby state at that position (previous recording). In the last part of the track, the read error 1~ signal is recorded after cumulative time value data is recorded over several tracks as described later. 6 At the above-mentioned standby position, cumulative time value data is recorded over several tracks. ).

During a recording operation on an LED in an information recording medium that does not have previously recorded information, the lead-in signal is not read from the main signal recording trace in area 2b of the lead-in signal area 2, so in this case, the cumulative time value data is indicates a predetermined value,
For example, the optical recording/reproducing head 0 is kept on standby so that the laser beam spot is located at 12 seconds of cumulative time value data.

After the start of recording by the recording and reproducing apparatus, the erasing laser (semiconductor laser) is controlled by a control signal given from the control unit 12 to the erasing laser drive circuit 10k of the optical recording and reproducing head 10 via the line 26. The recording/reproducing laser (semiconductor laser) 10b is brought into a recording/reproducing state by a control signal given from the controller 12 to the recording/reproducing laser drive circuit 10a in the optical recording/reproducing head 10 via the line 27. The light emitting state is made such that it has the light intensity required in the mode.

The recording/reproducing laser 10b emits a laser beam whose intensity is modulated by a signal supplied from the recording/reproducing laser drive circuit 10a that drives it, and the intensity modulation of the recording/reproducing laser 10b is performed as described above. The signal used for
As described above, this is a signal given from the encoder I5 to the recording/reproducing laser drive circuit 10a.

The encoder 15 converts the signal to be recorded supplied from the input terminal 14 to the signal successively generated from the recording trace by the pilot signal for tracking the main signal recording/reproducing area 3 in the information recording medium disc. A recording signal encoded by the cumulative time value data St and the chapter number inputted from the input section 13 is created, and is sent to the recording/reproducing laser drive circuit 10a in the optical recording/reproducing head 10. It is given to

When the laser beam spot moves from the main signal recording/reproducing area 3 to the lead-out signal area 4 while the recording operation continues, a lead-out signal is read out from the recording trace of the pilot signal for tracking in the lead-out signal area 4. If the encoder 1 is output from the recording circuit 16
5 and the control unit 12, and the control unit 12 controls the operating mode of the encoder 15 so that only the readout signal is supplied from the encoder 15 to the recording/reproducing laser drive circuit 10a, The lead-out signal is then recorded, and then the optical recording/playback head 10
The transport mechanism 11 is controlled so that the information quickly returns to the area 2a of the lead-in signal area 2, and then all the recorded contents recorded on the information recording medium disc, each corresponding chapter number, and the cumulative time value are Do you have data? The operations of the recording circuit 16, the encoder 15, the optical recording/reproducing head 10, etc. are controlled so that recording is performed on the area 2b of the Fi area 2, and after the above operations are completed, the optical recording/reproducing head 10 is returned to the home position and stopped.

In addition, when a lead-out signal is given from the input section 13 to the control section 12 in order to end the recording operation for the main signal recording and playback area 3 midway through the main signal recording and playback area 3, the control section 1
2 controls each part of the apparatus so that the recording circuit 16, encoder 15, optical recording/reproducing head IO, etc. perform the following operations at the end of the recording operation.

When an instruction to end the recording operation for the main signal recording/reproducing area 3 is given in the middle of the main signal recording/reproducing area 3, only the cumulative time value data is recorded over a period of several revolutions from that point, and then the lead-out signal is is recorded, and then the optical recording/reproducing head 10 is rapidly returned to the area 2a of the lead-in signal area 2, and then each recording content corresponding to all the recorded contents recorded on the information recording medium disc is recorded. After recording a lead-in signal consisting of chapter number, cumulative time value data, etc. in the entire region 2b of the lead-in signal region 2, the optical recording/reproducing head 10 is returned to the home position and the apparatus is stopped. It is made to be.

As mentioned above, when the optical recording/reproducing head 10 is rapidly returned to the area 2a of the signal area 2, both the recording/reproducing laser and the erasing laser are kept inactive. During the recording operation, the actuator 10r to which output signals from the tracking control circuit 18 and the focus control circuit 19 are supplied is connected to the objective lens 109.
is driven and controlled so that the writing operation is always performed in a good tracking state and in a good focus state. This point also applies to playback operations.

When input information for setting the recording and reproducing apparatus to the reproducing mode is given to the input unit 13, the control unit 12 causes each component of the recording and reproducing apparatus to sequentially perform operations required in the reproducing mode. A control signal is generated that allows the recording and reproducing apparatus to perform a reproducing operation, and the control signal is supplied to each component of the recording and reproducing apparatus, so that the recording and reproducing apparatus performs a reproducing operation.

When the recording and reproducing apparatus is put into the reproducing mode, a control signal generated by the control section 12 is supplied to the transport mechanism 11 via the line 30, so that the transport mechanism 11 moves the optical recording and reproducing head JO to the home position. From the position, the laser beam spots Lbl to Lb3 can be located in the area 2a of the lead-in signal area 2 on the information recording medium disk.
Move to a position.

Then, the recording and reproducing apparatus is put into the reproducing mode, and the optical recording and reproducing head 10 positions the laser beam spots Lb1 to Lb3 from the home position to the area 2a of the lead-in signal area 2 on the information recording medium disc. In the state where the information recording medium integrated board is placed in a position where it can be moved, the pilot signal read out from the recording trace of the tracking pilot signal from the area 2a on the information recording medium integrated board is connected to the signal section Sa as described above. The pilot consists of two signal parts: a continuous signal part Sc, and a pilot recorded in the recording trace of the tracking pilot signal existing in the area 2a of the lead-in signal area 2 on the information recording medium disk. The signal is its signal part S8
is in the form of a signal consisting only of the rotation synchronization signal Sr, so the laser beam spot L,
In the state where bl to Lb3 are located, the rotation synchronization signal Sr is read out by the laser beam spot Lb+ from the record trace by the tracking pilot signal (
Of the signals to be recorded in the recording trace of the pilot signal for tracking in the area 2a of the lead-in signal area 2, the signal part Sa is composed of the rotation synchronization signal Sr and the lead-in start signal. When the recording and reproducing apparatus is put into the reproducing mode, the motor drive control circuit 9, which is supplied with a control signal from the control section 12 via the line 31, performs a search for the lead-in signal quickly. The rotation of the motor 5 is controlled so that the motor 5 rotates at a rotation speed of a predetermined initial value. Then, the information recording medium disk is filled with a blank P4-I.
i) In region 2a of region 2, laser beam spot Lbl~
Lb3 is positioned, and the laser beam spot L
When the rotation synchronization signal Sr is read by bl, it is supplied from the light receiving section 10p to the motor drive i control circuit 9, and the motor drive control circuit 9 compares the rotation synchronization signal Sr supplied therewith with the reference signal. The rotational speed of the motor 5 is controlled so that the period of the rotation synchronization signal Sr read by the laser beam spot Lbl is always constant, so that the relative linear velocity between the laser beam spot and the information recording medium disc is always constant. so that it is done at a predetermined constant speed.

The optical recording/reproducing head 10 is transported by the transport mechanism 11, and the position of the laser beam spot is moved beyond the lead-in start part of the boundary between the region 28 and the region 2b of the lead-in signal region 2 on the information recording medium disk. 2b, the pilot signal read from the record trace of the tracking pilot signal in the area 2b has a signal part Sa of the rotation synchronization signal Sr and the data St of the negative accumulated time value, The rotation synchronization signal Sr is supplied to the motor drive control circuit 9 and used to control the rotation speed of the motor 5, and the data St of the negative cumulative time value is
is used in the control section 12 to generate a control signal.

In addition, all of the main signal recording traces in area 2b in lead-in signal area 2 include the chapter number corresponding to the recorded content recorded on the information recording medium disk and the cumulative time value corresponding to the recording area. Since data etc. are recorded, the optical recording/reproducing head 10 is transported by the transporter t411, and the position of the laser beam spot [. When moving, data such as the chapter number corresponding to the recorded contents of the information recording medium disk and the cumulative time value corresponding to the recording area are read from the main signal recording trace in the area 2b, and the data is read out from the main signal recording trace in the area 2b. control unit 12 via 17
and stored in memory.

The control unit 12 uses the cumulative time value data corresponding to the recorded content of the information recording medium disc and the cumulative time value data input to the input unit 13 indicating the position of the information of the chapter number 1 desired to be reproduced. A control signal is sent to quickly move the optical recording/reproducing head lO so that the laser beam spots Lbl to Lb3 can be positioned at the beginning of the recorded part of the information of the chapter number 1 desired to be reproduced in the main signal recording/reproducing area 3. It is given to the transfer section 11.

When the recording and reproducing apparatus is put into the reproducing mode according to the operation mode set in the input section 13, the line 2 is output from the control section 12.
6 to the erasing laser drive circuit 10k of the optical recording/reproducing head 10, the erasing laser 10j stops emitting light, and at the same time, the optical recording starts from the controller 12 via the line 27. °C,
The light emission output of the recording/reproducing laser 10b is made to have a constant and small intensity necessary for reproduction. Further, in the reproduction mode, the output signal of the encoder 15 is prevented from being supplied to the recording/reproducing laser drive circuit 10a by a control signal given to the encoder 15 from the control section via the line 29.

The eight laser beams emitted from the recording/playback laser 10b in the playback mode move from the recording/playback laser 10b to the collimating lens 10 in the same manner as the operation of the recording/playback apparatus in the recording mode described above.
c→laser beam cross-sectional shape correction element 10d→diffraction grating 10e, the zero-order diffracted light laser beam (in FIG. ) and ±
Laser beam of first-order diffracted light (11iD for information recording media)
In addition, a total of three laser beams are generated, including laser beams that produce tracking light spots as shown by Lbl, L, and b3 in FIG.

The three laser beams generated from the diffraction grating 10e as described above are transferred from the polarizing prism 10f to the quarter-wave plate Log.
→Objective] Through the path of Nons IOq, follow the arrow R in Figure 6.
As shown in FIG. 6, three light spots Lb are placed on the recording surface of the information recording medium disc rotating in the direction of
1. ．． Lb2. Lb3 is generated, but the recording trace of the main signal on the information recording medium disk is continuously irradiated with a small diameter laser beam spot with a circular cross section for reproduction, which is indicated by the symbol Lb2 in FIG. Then, the information signal is read from the recording trace of the main signal, and in FIG. 6, the information signal is read out from the recording trace of the main signal.

Two small diameter laser beam spots with a circular cross section, indicated by Lb3, are positioned at the boundary between the recording trace of the pilot signal for tracking and the recording trace of the main signal, thereby generating a tracking reference signal. used for.

As described above, the three laser beams irradiated onto the information recording medium disc cause the reflected light from the three laser beam spots Lbl to Lb3 generated on the information recording medium disc to be reflected from the objective lens 10q→1/4. Wave plate Log → polarizing prism 10
f → 1/4 wavelength plate ill → dichroic mirror 10m →
After passing through a path from the condensing lens 10n to the cylindrical lens 10°, the light is applied to the light receiving section Lop, which is made up of a plurality of light receiving elements.

In the Glory part 10p, tracking control is performed via 1,11121 using a tracking error signal obtained based on the output signal of a light receiving element that individually photoelectrically converts the reflected light from the laser beam spots Lbl and Lb3 on the information recording medium disk. A focus error signal obtained from a signal obtained by photoelectrically converting the reflected light from the laser beam spot Lb2 by a plurality of light receiving elements is applied to the focus control circuit 19 via the line 23.

Laser light spot Lb2 that illuminates the recording trace of the main signal
The light receiving unit converts the reflected light into a signal photoelectrically converted by the light receiving element],
The reproduction signal (No. 1) produced by Op.

When there are multiple information signals desired to be reproduced, the chapter numbers corresponding to the plurality of information signals desired to be reproduced are inputted in advance so that the information signals desired to be reproduced are sequentially reproduced. I can do it.

When the playback operation is finished, the optical recording/playback head
O is returned to the home position and the device is brought to a halt.

(Effects of the Invention) The method for recording signals on a repeatedly recordable information recording medium disc of the present invention is capable of erasing previously recorded information, and is equipped with a recording layer that allows information signals to be repeatedly recorded and reproduced. , Recording/reproducing operation at a constant linear velocity with respect to the recording trace of the main signal is a recording trace created in advance by a pilot signal for spiral tracking, which is set in advance in a manner that cannot be erased by changing the geometric shape. The lead-in area, the main signal recording/reproducing area, and the lead-out signal area are arranged side by side on the disc surface. The recording trace of the pilot signal for spiral tracking covering all the regions of the information recording medium disc includes rotation synchronization signals at predetermined intervals. The part other than the lead-out signal area of the record trace by the pilot signal for spiral tracking includes data of cumulative time values, and furthermore, the record trace by the pilot signal for spiral tracking A method for recording information signals on an information recording medium disk in which a lead-out signal area includes a beam-door signal, and a main signal to be recorded in a main signal recording/reproducing area. At the time of recording, the main signal, the chapter number input corresponding to the main signal, and the information reproduced from the recording trace by the pilot signal for tracking (cumulative time of the position to be recorded) The signal obtained by decoding the value data is recorded as a recording signal in the main signal record trace, and when the signal is played back from the record trace by the pilot signal for tracking, it is recorded in the main signal record trace. Since this is a signal recording method on a repeatedly recordable information recording medium disc in which only a lead-out signal is recorded, the main signal Since the recorded traces of the recording trace and the recorded traces of the pilot signal for tracking are different, the S/N of the main signal is improved. Using the rotation synchronization signal reproduced from the record trace of the tracking pilot signal recorded in advance,
In addition to being able to consistently perform good recording and reproducing operations at high recording density using the CLV method, it is also possible to record cumulative time data reproduced from a recording trace by a tracking pilot signal and the input chapter number. Since the recorded signal is encoded with the current signal and recorded as a recording signal, it is easy to access during playback, and when the lead-out signal area is reached, only the lead-out signal is automatically recorded and the recording operation ends. Further, by using data of cumulative time values, there are advantages such as the ability to express the recording time in terms of total time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a recording and reproducing apparatus to which the method of recording signals on a repeatedly recordable information recording medium disc of the present invention is applied, FIG. 2 is a plan view of the information recording medium disc, and FIGS.
The figure is an enlarged plan view showing a recording trace and a laser beam spot due to a pilot signal for tracking, FIG. 4 is an explanatory characteristic curve diagram, and FIGS. 5 and 7 are diagrams showing the configuration of the signal. D...Information recording medium disc, 2...Lead-in signal area, 3...Main signal recording/reproducing area-4...Lead-out signal area, 5...Motor, 6...Rotation of motor Axis, 7...turntable, 8...clamper, 9...
- Drive control circuit, 10... Optical recording/reproducing head, 10a... Recording/reproducing laser drive circuit, 10b...
Recording/reproducing laser, IOC, 10i... Collimating lens, 10d, 10h... Correction element for laser beam cross-sectional shape, 10e... Diffraction grating, 10f... Polarizing prism, 10g, 1.012... 174 wavelength plate, 10j...
・Erasing laser, 10k...erasing laser drive circuit,
10m...Dichroi multi-mirror, 10. n... Condensing lens, 100... Cylindrical lens, Lop... Light receiving section consisting of a plurality of light receiving elements, 10q... Objective lens,
10r...actuator, 11...transfer mechanism, 1
2...Control unit, 13...Input unit, ]4...Input terminal for information signal to be recorded, 15...Encoder, 16...Recording circuit, 17...Reproduction circuit, 1
8...Tracking control circuit, 1...Focus control circuit, 20...Reproduction signal output terminal, procedural amendment form (
(Voluntary initiative) February 7, 1985 Manabu Shiga, Commissioner of the Patent Office, Patent Application No. 116958, filed in 1982, 2, Title of Invention Method for recording signals on repeatable information recording medium disk 3,
Relationship with the case of the person making the amendment Patent Applicant Location 3-12, Moriom-cho, Kanayō-ku, Yokohama-shi, Kanagawa Prefecture Name (432) Japan Victor Co., Ltd. 4, Agent Showa, Month, Day (Shipping date Showa) Month, day) 6. Subject to correction

Claims (1)

[Claims] It is equipped with a recording layer that enables erasing of previously recorded information and allows information signals to be repeatedly recorded and reproduced. This is done under the control operation based on the reproduction signal from the recorded trace by the spiral tracking pilot signal that is set in advance in a manner that cannot be erased by change, and the lead-in on the disc surface. Recording using a pilot signal for spiral tracking over all of the above-mentioned areas in an information recording medium disc in which a signal area, a main signal recording/reproducing area, and a lead-out signal area are provided side by side. The trace includes rotation synchronization signals at predetermined intervals, and data of cumulative time values are included in the recording trace of the spiral tracking pilot signal other than the lead-out signal area. Furthermore, the lead-out signal area contained in the record trace by the pilot signal i for spiral tracking described above contains information including the lead-out signal on the recording medium disk. When recording, the main signal, the chapter number input corresponding to the main signal, and the position where the information signal is to be recorded are reproduced from the recording trace of the tracking pilot signal. The signal obtained by decoding the cumulative time value data is recorded as a recording signal in the main signal record trace. Also, when the lead-out signal is played back from the record trace by the tracking pilot signal, the lead-out signal is recorded in the main signal record trace. "Signal to a repeatable recordable information recording medium disk in which only the out signal is recorded"
recording method