JP2559143B2 - Optical disk recording device - Google Patents

Description

The present invention relates to an optical disk recording apparatus for recording various information on a recordable optical disk such as a so-called write-once type or rewritable type, and more specifically, to an optical disk recording apparatus. The present invention relates to an optical disc recording apparatus for performing recording by rotation control with a constant angular velocity using an optical disc on which prerecorded information is formed for the purpose of performing a rotation control with a constant linear velocity.

[Prior Art] In recent years, a magneto-optical disk has been actively developed as an optical disk capable of recording, reproducing, and erasing instead of a read-only optical disk such as a so-called compact disk (hereinafter referred to as a CD). This magneto-optical disk generally uses a magnetic thin film having perpendicular magnetic anisotropy as a recording medium, and irradiates a laser beam focused to about 1 μm to perform recording, reproduction and erasing. Specifically, recording and erasing are achieved by performing magnetization reversal by an external magnetic field by utilizing the fact that the coercive force decreases due to the temperature rise of the converging portion. Further, reproduction is achieved by detecting this with an analyzer by utilizing the fact that the polarization plane of the laser beam rotates due to the magneto-optical effect.

When recording and reproducing music information, computer data, etc. on the above magneto-optical disk, the rotation control of the magneto-optical disk by the spindle motor is similar to the CD, and the relative speed of the optical head along the track is constant. It is conceivable that the control is performed with a constant linear velocity (hereinafter referred to as CLV (Constant Linear Velocity)).

However, in the above CLV control, since it is necessary to change the rotation speed of the motor according to the radial position of the disc, the rotation control of the motor becomes complicated, and the optical head is moved in the radial direction of the disc to obtain a desired value. When the truck is accessed, the rotation speed of the motor has to be changed, which increases the time required for the access.

Therefore, when recording information such as computer data that can be changed in time series, the rotation speed of the motor is kept constant regardless of the disk radial position.
So-called constant angular velocity (hereinafter CAV (Constant Angular
Velocity)) control can be adopted. However, since the recording frequency is constant in this CAV method,
There is a problem that the recording density becomes lower toward the outer peripheral side of the disk and the recording capacity becomes insufficient.

Therefore, in the conventional CAV method, MCAV (Modified CAV) has increased the recording capacity by increasing the recording frequency toward the outer circumference of the disc to make the recording density almost constant between the inner and outer circumferences of the disc. A scheme has been proposed.

[Problems to be solved by the invention]

By the way, in the conventional recording by the MCAV method, recording is performed by providing several kinds of recording frequency generators, and selecting a recording frequency generator generating a recording frequency corresponding to the disc area to be recorded from among them. Is something
The disk is divided into a plurality of areas corresponding to the above-mentioned several kinds of recording frequencies to make the recording density of each area substantially constant, but the same recording density has not been obtained as compared with the recording by the CLV system.

In addition, a recordable optical disk such as a magneto-optical disk,
The pre-recorded information such as absolute address is recorded in advance in a non-erasable state. Normally, the format of the pre-recorded information is an optical disc whose rotation is controlled by CLV, and a CAV.
Or, since it is different from the optical disk for controlling rotation by MCAV, it is impossible to share the optical disk with both CLV and CAV (MCAV).

[Means for solving the problem]

In order to solve the above-mentioned problems, the optical disk recording apparatus according to the present invention is configured such that the pre-recorded information for controlling the rotation at a constant linear velocity over the entire surface is formed so that the cycle in the track direction becomes substantially constant. In an optical disk recording apparatus for recording on another optical disk, a drive means for rotationally driving the optical disk at a constant angular velocity, a prerecorded information reproducing means for reproducing the prerecorded information at the time of recording, and a prerecorded information reproduced by the prerecorded information reproducing means. First reference signal generating means for generating a first reference signal for setting the recording frequency based on the frequency component of the recording information, and recording means for recording at the recording frequency according to the reference signal generated by the reference signal generating means. The basic feature is to have and.

A second reference signal for setting a recording condition including at least one of the recording optical power and the recording magnetic field intensity is generated based on the prerecorded information reproduced by the prerecorded information reproducing means. Second reference signal generation means,
It is preferable to provide recording condition setting means for setting recording conditions based on the second reference signal from the second reference signal generating means and outputting the recording conditions to the recording means.

[Work]

According to the above configuration, the optical disc on which the prerecorded information such as the absolute address for controlling the rotation at the constant linear velocity (CLV) is formed is rotated at the constant angular velocity (CAV). The frequency component of is changed according to the radial position of the optical disc. That is, since the prerecorded information is formed for the purpose of controlling the rotation by the CLV, when this optical disc is rotated by the CLV as usual, the frequency component of the prerecorded information is almost constant regardless of the radial position of the optical disc. However, since the density (recording frequency) of the pre-recorded information within the same angle range is higher on the outer peripheral side of the optical disc, when the optical disc is rotated by CAV, the frequency component of the pre-recorded information is the outer peripheral side of the optical disc. The higher it goes, the higher it gets.

On the other hand, in the above MCAV method, the recording frequency also becomes higher toward the outer peripheral side of the optical disc, so that the first frequency of the clock or the like is determined based on the frequency component of the prerecorded information.
If the reference signal is generated and recording is performed at the recording frequency corresponding to the first reference signal, MCAV recording can be performed with a constant recording density at the inner and outer peripheral portions of the optical disc. In this case, since the recording frequency is determined based on the prerecorded information recorded in advance on the optical disc, the recording frequency is set accurately and the recording density is constant regardless of the radial position of the optical disc.

Further, since the above-mentioned optical disc has pre-recorded information formed for CLV for the purpose of recording by the CLV system, this optical disc can be shared by both CLV and MCAV systems. The utility value is increased.

By the way, in the MCAV system, when recording information by changing the recording frequency, if the recording is performed under a certain recording condition because the disc linear velocity is different at the radial position, uniform reproduction signal quality can be obtained. It will be difficult.

Therefore, as described above, the second reference signal generating means for generating the second reference signal for setting the recording condition including at least one of the optical power for recording and the strength of the magnetic field based on the frequency component of the prerecorded information. And a recording condition setting means for setting a recording condition based on the second reference signal from the second reference information generating means and outputting the recording condition to the recording means. The frequency component of the prerecorded information, in other words, the recording frequency. If the recording condition is changed according to the recording frequency (for example, the optical power and / or the magnetic field strength is increased as the recording frequency becomes higher), the reproduction signal quality is improved, such as improving the S / N ratio during reproduction. Can be improved.

[Embodiment 1] The following will describe one embodiment of the present invention with reference to FIGS. 1 to 8.

As shown in FIG. 2, a magneto-optical disk 1 as a rewritable optical disk is originally created for the purpose of recording, reproducing, and erasing by the CLV method, and its inner peripheral side end portion. A TOC (Table Of Contents) area 1a is provided at the same time, and most of the area outside the TOC area 1a is an information recording area 1b. When recording is performed on the magneto-optical disk 1 by the CLV method, various information such as a music program is recorded in the information recording area 1b while the MCAV is recorded on the magneto-optical disk 1.
In the case of recording by the method, data for computer and the like are recorded in the information recording area 1b. or,
In the TOC area 1a, additional information regarding each information recorded in the information recording area 1b, for example, recording start and end positions of each information, etc. are recorded.

As shown in FIG. 3, the TOC in the magneto-optical disk 1
In the area 1a and the information recording area 1b, spiral or concentric circular guide grooves 2, 2, ... (Hatched for convenience) are formed at predetermined intervals in the disk radial direction. The absolute address of each part on the magneto-optical disk 1 corresponds to whether it is "1" or "0" after biphase mark modulation as shown in Japanese Patent Laid-Open No. 64-39632. .. are biased inward or outward in the radial direction of the magneto-optical disk 1.

The above-mentioned bi-phase mark modulated absolute address forms pre-recorded information and is recorded at a substantially constant period along the guide groove 2 forming a track on the assumption that rotation control is performed by the CLV method. Therefore, within the same angle range, the frequency of recording the absolute address becomes higher toward the outer peripheral side of the disc. In the following, a case of recording information by the MCAV method using the magneto-optical disk 1 will be described.

As shown in FIG. 4, the optical disk recording apparatus according to the present embodiment has a spindle motor 3 as a driving means for supporting and rotating the magneto-optical disk 1 and a constant angular velocity (CAV). A CAV control circuit 4 for controlling the rotation speed of the spindle motor 3 so that the magneto-optical disk 1 is always rotated at a constant rotation speed regardless of the radial position.
And a role as a recording means for irradiating the magneto-optical disk 1 with laser light at the time of recording to raise the temperature of a predetermined portion, and pre-recorded information reproduction for reproducing pre-recorded information based on the reflected light from the magneto-optical disk 1. An optical head 5 having a role as a unit and a coil (electromagnet) 6 as a recording unit for applying a magnetic field to the magneto-optical disk 1 at the time of recording are provided.

The present optical disc recording apparatus is configured to perform recording by a so-called magnetic field modulation method, and is capable of overwriting by newly recording new information on already recorded information. Recording may be performed by a so-called light modulation method instead of the magnetic field modulation method.

The optical disk recording apparatus includes an input terminal 7 for inputting information to be recorded, and digital information input from the input terminal 7 is synchronized in a recording signal processing circuit 8 based on a clock from a clock generating circuit 13 described later. Is taken, and if necessary processing is performed,
It is supplied to the coil driver 10. As will be described later, the frequency of the clock supplied from the clock generation circuit 13 becomes higher toward the outer peripheral side of the magneto-optical disk 1,
Therefore, the recording frequency becomes higher toward the outer peripheral side of the magneto-optical disk 1.

At the time of recording, the coil driver 10 drives the coil 6 based on the signal supplied from the recording signal processing circuit 8, and at the same time, the optical head 5 irradiates the magneto-optical disk 1 with laser light to record the signal. It is supposed to be.

Further, the laser light emitted from the optical head 5 at the time of recording is reflected by the magneto-optical disk 1 and returns to the optical head 5, and the prerecorded information is detected based on the reflected light. That is, the reflected light from the magneto-optical disk 1 is received by the photodetector included in the optical head 5 and converted into an electric signal, and the output signal of this photodetector is amplified by the reproduction amplifier 11 and then, for example, in the band. It is sent to the prerecorded information detection circuit 12 which is a pass filter.

The prerecorded information detection circuit 12 extracts only the prerecorded information represented by the deviation of the guide grooves 2.2 from the signal reproduced from the magneto-optical disk 1 at the time of recording. That is, if the frequency band of the pre-recorded information is set to a relatively narrow range and is different from the frequency band of the information by the magneto-optical signal, the pre-recorded information detection circuit 12
It is possible to separate only prerecorded information.

The pre-recorded information detected by the pre-recorded information detection circuit 12 is the clock generation circuit 13 as the first reference signal generation means.
The recording clock is generated as the first reference signal based on the frequency component of the pre-recorded information. At the time of input to the clock generation circuit 13, the absolute address has not been demodulated yet and is in the state of the biphase mark modulated wave. The frequency of the recording clock is proportional to the bit frequency of the bi-phase mark modulated wave of the absolute address as the pre-recorded information. Since the magneto-optical disk 1 is rotationally controlled by the CAV, the frequency of the pre-recorded information increases toward the outer peripheral side of the magneto-optical disk 1, and therefore the frequency of the clock generated by the clock generation circuit 13 is magneto-optical. It becomes larger toward the outer peripheral side of the disc 1. Therefore, the recording frequency becomes higher toward the outer peripheral side of the magneto-optical disk 1, and the recording density becomes constant regardless of the radial position.

Although not shown, the optical disk recording apparatus is provided with a pre-recorded information demodulation circuit for demodulating the bi-phase mark modulated wave of the absolute address detected by the pre-recorded information detection circuit 12 to read the absolute address. The value of the absolute address is recognized by the prerecorded information demodulation circuit as required.

Hereinafter, a specific configuration example of the clock generation circuit 13 will be described.

As shown in FIG. 5, the clock generation circuit 13 includes a phase comparator 14, a low pass filter (LPF) 15, a voltage controlled oscillator (VCO) 16 and a frequency divider 17, and is a so-called phase lock. It is configured as a droop (PLL).

That is, to one input terminal of the phase comparator 14, the bi-phase mark modulated wave of the absolute address which is the pre-recorded information from the pre-recorded information detection circuit 12 is input. The output signal of the phase comparator 14 is sent to the voltage controlled oscillator 16 via the low pass filter 15, and the recording clock as the output signal of the voltage controlled oscillator 16 is supplied to the recording signal processing circuit 8. Further, this recording clock is sent to the frequency divider 17, is frequency-divided by the frequency divider 17 at a predetermined frequency division ratio, and is then input to the other input terminal of the phase comparator 14. There is.

The bit frequency of the bi-phase mark modulated wave of the absolute address input to one input terminal of the phase comparator 14.
f ₁ varies depending on the radial position of the magneto-optical disk 1,
For example, several KHz~ several tens KHz about the frequency f ₂ of the clock for recording outputted from the voltage controlled oscillator 16 will vary in proportion to the f _1, for example, about several MHz.

FIG. 6 shows another configuration example of the clock generation circuit 13. In this configuration example, the clock generation circuit 13 uses the F / V (frequency /
Voltage converter 18 and V / F (voltage / frequency) converter 20 located at the subsequent stage. F / V converter 18 receives a bi-phase mark modulated wave of prerecorded information while V The output of the / F converter 20 is used as a recording clock. It should be noted that the F / V converter 18 and the V / F converter 20 are set so that the frequency f ₂ of the recording clock is considerably larger than the bit frequency f ₁ of the bi-phase mark modulated wave of the absolute address which is the pre-recorded information. The conversion rate of is set.

FIG. 7 shows still another configuration example of the clock generation circuit 13. That is, the clock generation circuit 13 counts the changing points per unit time of the synchronization clock generated by the phase synchronization circuit (not shown) from the bi-phase mark modulated wave of the absolute address which is the pre-recorded information.
And a conversion table 22 that includes a ROM (Read Only Memory) and outputs a value according to the frequency measured by the frequency measurement unit 21 to the programmable oscillator 23, and oscillates at a frequency according to the value from the conversion table 22. And a programmable oscillator 23, and the output signal of the programmable oscillator 23 is used as a recording clock.

FIG. 8 shows another example of the configuration of the clock generation circuit 13. Between the change points of the synchronization clock generated by the phase synchronization circuit (not shown) with respect to the pre-recorded information composed of the bi-phase mark modulated wave of the absolute address. A conversion table that outputs the value corresponding to the period measured by the period measuring unit 24 and the period measured by the period measuring unit 24 to the programmable oscillator 26.
25 and a programmable oscillator 26 that oscillates at a frequency f ₂ according to the value from the conversion table 25, and the output signal of the programmable oscillator 26 is used as a recording clock.

In the above description, the recording of information on the magneto-optical disk 1 was mainly described. However, the present optical disk recording apparatus irradiates the magneto-optical disk 1 with laser light at a laser power lower than that at the time of recording. Thus, the information reproduction based on the magneto-optical effect can be performed.

As described above, in this embodiment, as shown in FIG.
Rotate the magneto-optical disk 1 and control it with CAV (S
1), the information on the magneto-optical disk 1 is reproduced to extract the bi-phase mark modulated wave of the absolute address which is the pre-recorded information and the bit frequency f ₁ of the bi-phase mark modulated wave.
Is detected (S2), a clock (frequency f ₂ ) for generating recording data is generated from the above f ₁ (S3), and recording data is written (S4) using this clock. In addition,
FIG. 1 is a diagram for conceptually explaining the content of the present invention, and does not show a strict processing procedure or the like.

[Second Embodiment] Next, a second embodiment will be described with reference to FIGS. 9 to 11.

As shown in FIG. 9, the second embodiment has almost the same configuration as the first embodiment, and the clock generation circuit 13 changes the recording clock that changes according to the radial position of the magneto-optical disk 1 by the pre-recording information. After the generation, the recording is performed at the recording frequency according to the radial position of the magneto-optical disk 1.
In the second embodiment, a magnetic field control circuit 27 is provided for changing the strength of the magnetic field applied by the coil 6, which is one of the recording conditions, according to the recording frequency during recording. In addition,
The same members as those of the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

The magnetic field control circuit 27 will be described below. As shown in FIG. 10, the magnetic field control circuit 27 has a role as a second reference signal generating means and a recording condition setting means. For example, an F / V converter 28 It consists of The pre-recorded information detection circuit 12 sends a pre-recorded information bi-phase mark modulated wave of an absolute address to the F / V converter 28, and the optimum disc linear velocity corresponding to the bit frequency of the bi-phase mark modulated wave is transmitted. A magnetic field control signal composed of a voltage having a value corresponding to the magnetic field is output to the coil driver 10.

As a result, as the bit frequency of the bi-phase mark modulated wave of the absolute address increases, in other words,
It is set so that the strength of the magnetic field generated by the coil 6 increases as the linear velocity of the disk increases. As a result, effects such as improvement of the S / N ratio during reproduction can be obtained.

FIG. 11 shows another configuration example of the magnetic field control circuit 27. Here, the magnetic field control circuit 27 demodulates the pre-recorded information consisting of the bi-phase mark modulated wave of the absolute address to recognize the absolute address value, and the magnetic field corresponding to the absolute address value from the address decoder 30. A conversion table 31 for outputting a control circuit and a D / A converter 32 for D / A (digital / analog) converting the magnetic field control signal output from the conversion table 31 and outputting the converted signal to the coil driver 10 are provided. Also in this case, as the recording frequency increases, in other words, the linear velocity of the disk increases, the coil 6
Is set so that the strength of the magnetic field applied from

Third Embodiment Next, a third embodiment will be described based on FIGS. 12 to 14.

As shown in FIG. 12, the third embodiment basically has the same structure as the first embodiment. In the third embodiment, the recording power, which is one of the recording conditions, that is, the optical head 5 to the magneto-optical disk 1 is changed according to the change of the recording frequency.
The recording power control circuit 33 is provided for changing the optical power of the laser light applied to the recording medium.

As shown in FIG. 13, the recording power control circuit 33 has a role as a second reference signal generating means and a recording condition setting means, and is composed of, for example, an F / V converter 34. Then, a voltage corresponding to the bit frequency of the bi-phase mark modulated wave of the absolute address as the pre-recorded information sent from the pre-recorded information detection circuit 12 is input to the optical head 5. As a result, the higher the recording frequency,
In other words, the power of the laser light emitted from the optical head 5 increases as the linear velocity of the disk increases. As a result, effects such as improvement of the S / N ratio during reproduction can be obtained.

FIG. 14 shows another configuration example of the recording power control circuit 33.
Here, the recording power control circuit 33 is an address decoder 35 for recognizing the value of the absolute address by demodulating the bi-phase mark modulated wave of the absolute address as the pre-recorded information,
A conversion table 36 that outputs a recording power control signal as a second reference signal according to the absolute address value from the address decoder 35, and a recording power control signal from the conversion table 36 are D / A converted to the optical head 5. It has a D / A converter 37 for outputting. Also in this case, the higher the recording frequency,
In other words, the recording power is set to increase as the linear velocity of the disc increases.

In the second and third embodiments, only one of the magnetic field strength and the recording power is changed according to the change of the recording frequency, but instead, both the magnetic field strength and the recording power are changed. It may be configured to change. Furthermore, as another recording condition, the pulse width of the recording information may be changed according to the fluctuation of the recording frequency.

As shown in FIG. 1, also in the second and third embodiments, as in the first embodiment, the bit frequency f ₁ of the bi-phase mark modulated wave of the absolute address as the pre-recorded information.
Is used according to the radial position of the magneto-optical disk 1, the clock for recording is based on the above frequency f _1.
f ₂ is generated (S1 to S4). In addition, a control signal for recording conditions is generated by the above-mentioned prerecorded information (S5),
The control signal is used to control the strength of the applied magnetic field and / or the recording power (S6) to improve the S / N ratio during reproduction.

It should be noted that the above embodiment has been described by using the example in which the prerecorded information is recorded by displacing the guide groove 2 in correspondence with the bi-phase mark modulated wave of the absolute address.
The present invention is not limited to this, and other modulation schemes with limited frequency bands may be used. Further, the guide groove 2 may be meandered instead of being biased.

Further, in the above-mentioned embodiment, the optical disk recording apparatus for recording on the magneto-optical disk has been described, but other than that, a rewritable optical disk such as a so-called phase change type optical disk or a one-time-only optical disk is used. The present invention can also be applied to an optical disc recording apparatus that records on a recordable write-once optical disc.

〔The invention's effect〕

The optical disc recording apparatus according to the present invention, as described above,
In an optical disk recording device for recording on an optical disk formed by pre-stored information for controlling rotation at a constant linear velocity over the entire surface so that the period in the track direction is substantially constant, the optical disk is rotated at a constant angular velocity. Driving means for driving, prerecorded information reproducing means for reproducing the prerecorded information at the time of recording, and a first reference signal for setting a recording frequency based on a frequency component of the prerecorded information reproduced by the prerecorded information reproducing means. And a recording means for recording at a recording frequency according to the reference signal generated by the reference signal generating means.

As a result, the optical disc on which the prerecorded information such as absolute address for controlling the rotation at the constant linear velocity (CLV) is formed is rotated at the constant angular velocity (CAV), so that the frequency component of the prerecorded information is It changes according to the radial position of the optical disk. That is, since the prerecorded information is formed for the purpose of controlling the rotation by the CLV, when this optical disc is rotated by the CLV as usual, the frequency component of the prerecorded information is almost constant regardless of the radial position of the optical disc. However, since the density (recording frequency) of the pre-recorded information within the same angle range is higher on the outer peripheral side of the optical disc, when the optical disc is rotated by CAV, the frequency component of the pre-recorded information is the outer peripheral side of the optical disc. The higher it goes, the higher it gets.

On the other hand, in the above MCAV method, the recording frequency also becomes higher toward the outer peripheral side of the optical disc, so that the first frequency of the clock or the like is determined based on the frequency component of the prerecorded information.
If the reference signal is generated and recording is performed at the recording frequency corresponding to the first reference signal, MCAV recording can be performed with a constant recording density at the inner and outer peripheral portions of the optical disc. In this case, since the recording frequency is determined based on the prerecorded information recorded in advance on the optical disc, the recording frequency is set accurately and the recording density is constant regardless of the radial position of the optical disc.

Further, since the above-mentioned optical disc has pre-recorded information formed for CLV for the purpose of recording by the CLV system, this optical disc can be shared by both CLV and MCAV systems. The utility value is increased.

By the way, in the MCAV system, when the recording frequency is changed and information is recorded, since the disc linear velocity is different at the radial position, if the recording is performed under a constant recording condition, a uniform reproduction signal quality can be obtained. It will be difficult.

Therefore, the second reference signal for setting the recording condition including at least one of the optical power for recording and the strength of the magnetic field for recording is generated based on the prerecorded information reproduced by the prerecorded information reproducing means. A second reference signal generation unit and a recording condition setting unit that sets a recording condition based on the second reference signal from the second reference information generation unit and outputs the recording condition to the recording unit are provided. In other words, the recording condition is changed according to the disc radial position (for example, the optical power and /
Alternatively, by increasing the strength of the magnetic field), it is possible to improve the reproduction signal quality such as improving the S / N ratio during reproduction.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention. FIG. 1 is a flow chart showing a schematic processing procedure of the optical disk recording apparatus. FIG. 2 is a schematic plan view of the magneto-optical disk. FIG. 3 is a partially enlarged view of FIG. FIG. 4 is a block diagram of the optical disk recording device. 5 to 8 are block diagrams showing specific configuration examples of the clock generation circuit. 9 to 11 show the second embodiment. FIG. 9 is a block diagram of the optical disk device. FIG. 10 and FIG. 11 are block diagrams showing specific configuration examples of the magnetic field control circuit. 12 to 14 show the third embodiment. FIG. 12 is a block diagram of the optical disk device. FIG. 13 and FIG. 14 are block diagrams showing specific configuration examples of the recording power control circuit. 1 is a magneto-optical disk (optical disk), 3 is a spindle motor (driving means), 5 is an optical head (pre-recorded information reproducing means and recording means), 6 is a coil (recording means), and 13 is a clock generation circuit (see first section). Signal generation means) 27 is a magnetic field control circuit (second reference signal generation means / recording condition setting means) and 33 is a recording power control circuit (second reference signal generation means / recording condition setting means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-166343 (JP, A) JP-A 64-67725 (JP, A) JP-A 63-205819 (JP, A) JP-A 64-- 39632 (JP, A)

Claims (2)

(57) [Claims] 1. An optical disk recording apparatus for recording on an optical disk, wherein pre-recorded information for controlling rotation at a constant linear velocity over the entire surface is recorded on an optical disk formed so that a cycle in a track direction is substantially constant. To set the recording frequency based on the frequency component of the pre-recorded information reproduced by the pre-recorded information reproducing means and the drive means for rotationally driving the pre-recorded information at the time of recording. An optical disc comprising: a first reference signal generating means for generating the first reference signal of 1), and a recording means for recording at a recording frequency according to the reference signal generated by the first reference signal generating means. Recording device. 2. A second reference signal for setting a recording condition including at least one of a recording optical power and a recording magnetic field intensity based on the prerecorded information reproduced by the prerecorded information reproducing means. And a recording condition setting unit for setting recording conditions based on the second reference signal from the second reference signal generating unit and outputting the recording conditions to the recording unit. The optical disc recording apparatus according to claim 1, wherein the optical disc recording apparatus is a recording medium.