JP2003173530A - Optical disk recorder, method and program for controlling optical disk recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform high grade recording operation in a recording linear speed, which an optical disk such as a CD-R cannot cope with. <P>SOLUTION: In an optical disk recorder 100, the information making to correspond the identification information of the optical disk and the range of the recording linear speed which this disk is coped with, is stored in a memory 30 by preliminarily performing the recording experiment, etc. When the actual recording is carried out, the range of the recording linear speed which the disk copes with, is discriminated from the result of the discrimination of the disk objective for the recording, and the data recording operation adopting the different recording modulation method in accordance with the state, whether the set recording linear speed is included in the aforementioned range or not, is carried out. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a CD-R (Compac
The present invention relates to an optical disc recording device for recording data on an optical disc such as a disc, a control method of the optical disc recording device, and a program for controlling the optical disc recording device.

[0002]

2. Description of the Related Art Various optical disk recording devices for recording data on an optical disk such as a CD-R disk have been provided. This optical disk recording device drives an optical disk at a predetermined linear velocity and irradiates the optical disk with a laser beam to form a pit having a length corresponding to data, thereby recording data. Here, when an attempt is made to perform high speed recording (for example, 24 times the standard speed) by increasing the linear velocity, the disc trace length per unit time becomes longer than that at the standard speed recording. Therefore, when performing high-speed recording, it is necessary to increase the power level of the recording laser light. On the other hand, if the power level of the recording laser beam is increased, the effect of so-called thermal interference increases, and as illustrated in FIG. 10, pits longer than the pit length originally intended to be formed on the optical disc are formed, and data recording is normally performed. There is a problem that cannot be done.
Therefore, as a dedicated optical disc for high-speed recording, there is provided a disc having a thin recording film, for example, so that thermal interference does not easily occur even when a recording laser beam of a high power level is irradiated. ing.

[0003]

However, such a high-speed recording disk has a problem that high-quality recording cannot be obtained even if recording is performed at a low speed like a normal disk. That is, since a dedicated disk for high-speed recording is improved so as not to cause thermal interference so as to cope with a high recording linear velocity of, for example, 10 to 24 times, a velocity outside the corresponding range (for example, 1 × At a low speed (up to 8 times), the pits were not formed normally and the recording quality deteriorated.

The present invention has been made in consideration of the above points, and has a high quality even when data is recorded on an optical disc such as a CD-R at a recording speed which the disc does not support. An object of the present invention is to provide an optical disk recording device capable of recording, a control method of the optical disk recording device, and a program for controlling the optical disk recording device.

[0005]

In order to solve the above-mentioned problems, an optical disk recording apparatus according to the present invention drives an optical disk so that recording is performed at a set recording linear velocity,
By irradiating the optical disc with laser light,
In an optical disc recording device for forming data with a pit having a length corresponding to data, an identification unit for identifying the type of an optical disc to be recorded and a recording in which the recording linear velocity corresponds to the identified type of the optical disc. And a laser control means for changing the modulation method of the laser light when the linear velocity is lower than the minimum velocity of the linear velocity range. According to this configuration, when the set recording linear velocity is smaller than the minimum value of the recording linear velocity corresponding to the type of the optical disk to be recorded, recording is performed by changing the laser light modulation method. For example, 10 times the standard speed
Even in the case where recording is performed at a standard speed on an optical disc compatible with 24 times, high-quality recording can be performed because the laser light modulation method is controlled to an appropriate one.

Here, when the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range, the laser control means sets 1 more than when it is included in the recording linear velocity range.
The preferred embodiment is characterized in that the total power of the laser light applied to form the pits is increased. Further, the laser control means adopts a modulation method of irradiating a single pulse laser beam to form one pit when the recording linear velocity is included in the recording linear velocity range. When the linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified optical disc type, a modulation method of irradiating a plurality of pulsed laser beams to form one pit is adopted. You may decide to.

Further, an optical disc identification information recording means for storing the type of the optical disc and the recording linear velocity range in association with each other may be provided. Then, the identifying means may identify the type of the optical disc from a reproduction signal obtained by reproducing the lead-in area of the optical disc.

In the test recording performed by the laser control means for determining the power of the recording laser beam in the actual data recording, the recording linear velocity is in the recording linear velocity range corresponding to the disc type identified. It is preferable that the laser light modulation method is different when the speed is smaller than the minimum speed.

According to the control method of the optical disk recording apparatus of the present invention, the optical disk is driven so that the recording is performed at the set recording linear velocity, and the optical disk is irradiated with the laser beam to obtain the length corresponding to the data. In the control method of the optical disc recording apparatus for forming data pits for recording data, an identification step for identifying the type of the optical disc to be recorded and a recording linear velocity range in which the recording linear velocity corresponds to the identified type of the optical disc. And a laser control step for changing the modulation method of the laser light. According to such a control method of the optical disc recording apparatus, when the set recording linear velocity is smaller than the minimum value of the recording linear velocity corresponding to the type of the optical disc to be recorded, the laser light modulation method is changed. Can be recorded. For example, even when recording is performed at a standard speed on an optical disc corresponding to 10 to 24 times the standard speed, the modulation method of the laser light can be controlled to an appropriate one, so that It is possible to record quality.

Here, in the laser control step, if the recording linear velocity is included in the recording linear velocity range, 1
1 is adopted when the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified type of the optical disc. It may be characterized by including a step of adopting a modulation method of irradiating a plurality of pulsed laser beams in order to form pits.

A program for controlling an optical disk recording apparatus according to the present invention drives an optical disk so that recording is performed at a set recording linear velocity, and irradiates the optical disk with a laser beam to handle data. Is a program for controlling an optical disc recording apparatus for forming data with a pit of a predetermined length, the discriminating means for discriminating the type of the optical disc to be recorded by the computer and the recording linear velocity. When it is smaller than the minimum velocity of the recording linear velocity range corresponding to the type of the optical disc, it is a program for functioning as a laser control means for changing the modulation method of the laser light. According to such a program, even when the set recording linear velocity is smaller than the minimum value of the recording linear velocity corresponding to the type of the optical disc to be recorded,
Since recording can be performed by changing the modulation method of laser light, high-quality recording can be performed.

Here, when the recording linear velocity is within the recording linear velocity range, the laser control means employs a modulation method of irradiating a single pulse laser beam to form one pit, When the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified optical disc type, a modulation method of irradiating a plurality of pulse laser beams to form one pit may be adopted. It may be a feature.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

A: Configuration A1: Optical Disc Recording Device FIG. 1 shows a configuration diagram of an optical disc recording device 100 according to an embodiment of the present invention. The optical disc recording apparatus 100 includes an optical pickup 10, a spindle motor 11, an RF amplifier 12, a servo circuit 13, an address detection circuit 14, a decoder 15, a controller 16, an encoder 17, a strategy circuit 18, a laser driver 19, and a laser power control circuit 2.
0, an envelope detection circuit 22, and a β detection circuit 24.

The spindle motor 11 is a motor for rotationally driving an optical disc (CD-R disc is assumed in this embodiment) D for recording data. The optical pickup 10 has a laser diode, an optical system such as a lens and a mirror, and a light receiving element for returning light. The optical pickup 10 irradiates the optical disc D with laser light and receives the return light from the optical disc D when recording and reproducing data. Then, the EFM (Eigh
t to Fourteen Modulation) RF modulated RF signal
Output to the amplifier 12. Also, the optical pickup 10
When the monitor diode is provided and a current flows through the monitor diode by the return light of the optical disc D, a signal corresponding to this current amount is supplied to the laser power control circuit 20.

The RF amplifier 12 amplifies the EFM-modulated RF signal supplied from the optical pickup 10, and outputs the amplified RF signal to the servo circuit 13 and the address detection circuit 1.
4, the decoder 15, the envelope detection circuit 22, the β detection circuit 24, and the level detection circuit 27.

The decoder 15 uses the RF amplifier 12 during reproduction.
The EFM-modulated RF signal supplied from EFM is demodulated by EFM to generate reproduction data.

The β detection circuit 24 calculates a β (asymmetry) value from the EFM-modulated RF signal supplied from the RF amplifier 12 as a parameter relating to reproduction signal quality, and outputs the calculation result to the control unit 16. Here, when the peak value of the EFM-modulated signal waveform is a (sign is +) and the bottom level is b (sign is −), the β value is (a +
b) / (ab).

The address detection circuit 14 includes an RF amplifier 12
The wobble signal component is extracted from the RF signal supplied from, and the address time information indicating the disk position included in the wobble signal component is decoded and output to the control unit 16. CD
Since the address time information is recorded in advance on the -R disc at regular intervals, the control unit 16 detects the timing at which the decoded address time information is supplied, so that the disc linear velocity becomes constant. Can be driven to rotate. When recording data on the optical disc D, the envelope detection circuit 22 supplies the R supplied from the RF amplifier 12 to search an unrecorded area.
The envelope of the F signal is detected.

The servo circuit 13 includes a spindle motor 11
Rotation control, focus control of the optical pickup 10, tracking control, and feed control. Servo circuit 1
3 drives the spindle motor 11 based on a control signal indicating a predetermined linear velocity supplied from the control unit 16.
Specifically, when a control signal indicating a predetermined linear velocity is supplied from the control unit 16, the servo circuit 13 drives the spindle motor 11 so that the optical disc D is traced at the value of the linear velocity.

The encoder 17 EFM-modulates the supplied recording data and outputs it to the strategy circuit 18.

The strategy circuit 18 subjects the EFM signal supplied from the encoder 17 to time axis correction processing and the like on the basis of the recording modulation system control signal supplied from the control unit 16, and outputs the EFM signal to the laser driver 19. Here, in the present embodiment, as the recording modulation method, one of the single pulse recording modulation method and the multi-pulse recording modulation method is used. The selection control of these two recording modulation methods will be described later.

The laser driver 19 is used in the strategy circuit 1
The laser diode of the optical pickup 10 is driven under the control of the laser power control circuit 20 and the signal modulated in accordance with the recording data supplied from the No. 8.

The laser power control circuit 20 controls the laser power emitted from the laser diode of the optical pickup 10. Specifically, the laser power control circuit 20 determines the optimum value based on the current value supplied from the monitor diode of the optical pickup 10 and the information indicating the optimum target value of the laser power supplied from the control unit 16. The laser driver 19 is controlled so that the laser beam having the laser power is emitted from the optical pickup 10.

The control unit 16 includes a CPU 31, a ROM and an R.
It has a memory 30 composed of an AM or the like, and controls each unit of the optical disc recording apparatus 100 according to a predetermined control program stored in advance in the memory 30. Specifically, it controls the focus servo mechanism, the tracking servo mechanism, the recording power value, and the rotation control of the spindle motor 11 for recording data. Also,
As a control that characterizes the present invention, the control unit 16 identifies the optical disc D to be recorded, and determines the recording linear velocity range corresponding to the optical disc D from the identification result. Then, after determining whether or not the recording linear velocity set by the user is included in the determined recording linear velocity range, the recording modulation method for actual recording is determined, and then the actual recording is performed. .

A2: Regarding Recording Modulation System In the optical disc recording apparatus 100 according to the present embodiment, a recording modulation system corresponding to the type of the optical disc D to be recorded and the recording linear velocity value set by the user is adopted. Characterize. In the present embodiment, it is assumed that either one of the two methods of the single pulse recording modulation method and the multi-pulse recording modulation method is adopted as the recording modulation method.

First, an outline of the two recording modulation methods will be described. The single pulse recording modulation method is a recording modulation method adopted in a general CD-R recording device. Specifically, it is a recording modulation method in which a laser is modulated such that a single pulse of laser light is irradiated when one pit is formed on the optical disc D. By adjusting the time width of this single-pulse laser beam, pits corresponding to data can be formed. FIG. 2 shows 3T of EFM data by the single pulse recording modulation method.
It is a conceptual diagram in the case of recording data and 5T data (T: reference length of recording data). Thus, 3T data, 5
The optical disc D is irradiated with a single-pulse recording laser beam having a time width corresponding to T data to form pits corresponding to each data.

The multi-pulse recording modulation method is a general CD
-RW (Compact Disc-ReWritable) This is a recording modulation method adopted in a recording apparatus. Specifically, it is a recording modulation method in which when forming one pit on the optical disc D, the laser is modulated so as to irradiate a plurality of pulses of laser light. By adjusting the number of pulses of the plurality of pulses, pits corresponding to the data are formed. Figure 3
FIG. 3 is a conceptual diagram when 3T data and 5T data of EFM data are recorded by a multi-pulse recording modulation method. As described above, the pits corresponding to the data are formed by adjusting the pulse number of the recording laser light so as to correspond to the time width corresponding to the 3T data and the 5T data.

Here, the applicant of the present invention has proposed a high speed (in the present embodiment, a speed 10 to 24 times the standard speed is assumed).
Optical discs have been improved to suppress thermal interference, and the reaction of laser light to heat is slowed down.
When recording on a high-speed disc at a low speed (in the present embodiment, a speed that is 1 to 8 times the standard speed is assumed), the recording laser power is higher than when a low-speed recording is performed on a normal disc. I thought it might be necessary. Furthermore, the applicant of the present invention not only increases the recording laser power when recording at a low speed on a high-speed disc,
We wondered if we should adopt a recording modulation method that is different from that of ordinary disks. Specifically, the pits are formed more accurately and higher recording quality can be obtained in the recording by the multi-pulse recording modulation method than the single-pulse recording modulation method adopted as a normal CD-R disc recording apparatus. I thought it might be.

Based on the above idea, the applicant is the CD-R
As a result of conducting a recording experiment on a disc, the applicant's hypothesis, that is, when recording at a low speed on a high-speed disc, not only is the power of the recording laser beam increased as compared to the case of recording on a normal disc, The authors have shown that high-quality recording can be performed when recording is performed by changing the recording modulation method to the multi-pulse recording modulation method. Furthermore, even though it is generally called an optical disk for high-speed recording, it is not a single type, and there are variations due to manufacturers, etc.
Some discs are capable of high-quality recording even by the recording modulation system (single pulse recording modulation system) similar to that of the D-R disc. That is, since the degree of measures for suppressing thermal interference varies depending on the manufacturer, etc., on the recording side, the recording modulation system is selected after identifying the type of disc to be recorded. I thought it was preferable to make an actual record.

In the present embodiment, the range of the recording linear velocity supported by the optical disc is 1 to 24 times the standard velocity (described as a disc corresponding to 1 to 24 times), 10 to 10 times.
It is assumed that there are two types, that is, a 24-fold type (described as a 10-fold to 24-fold compatible disc).

The memory 30 of the optical disc recording apparatus 100 stores in advance a table in which the identification information for identifying the optical disc D and the range of the recording linear velocity corresponding to the disc are associated with each other. FIG. 4 schematically shows the contents of this table, and the information on the corresponding recording linear velocity is obtained by conducting a recording experiment on the optical disc D in advance. Further, in the present embodiment, disc ID information is assumed as identification information for identifying the optical disc D. Disk I
The D information is information recorded in advance in the lead-in area of a general CD-R disc as information on the manufacturer of the optical disc D, the pigment material, and the like.

B: Operation Next, the operation of the optical disc recording apparatus 100 according to this embodiment will be described.

B1: Determination of Recording Modulation Method FIG. 5 is a flow showing the control contents of the control unit 16 when determining the recording modulation method. First, the control unit 16 detects the disc ID information in order to identify the optical disc D set by the user. Specifically, it is detected by reproducing the lead-in area of the optical disc D (step Sa1).

Next, the control unit 16 acquires information on the recording linear velocity range corresponding to the optical disc D based on the detected ID information and the information in the memory 30 (step S).
a2). In the present embodiment, it is determined whether the recording linear velocity range corresponding to the optical disc D is 1 to 24 times the standard velocity or 10 to 24 times the standard velocity.
Further, the control unit 16 acquires information on the recording linear velocity set by the user (step Sa3), and determines whether or not the recording linear velocity set by the user is included in the recording linear velocity range corresponding to the optical disc D. It is determined (step Sa4).

When the optical disk D is included in the corresponding recording linear velocity range (step Sa5: YES), the control section 16 determines to adopt the single pulse recording modulation method as the recording modulation method (step Sa6). . For example, when the optical disc D is a disc corresponding to 1 to 24 times and the user sets 1 time recording, or when the optical disc D is a disc corresponding to 10 to 24 times and the user sets 24 times recording, the control unit 16 Determines to adopt the single pulse recording modulation method (step Sa6).

On the other hand, when the optical disc D is a disc compatible with 10 to 24 times and the user sets the 1 × speed (step Sa5: NO), that is, the recording linear velocity not supported by the optical disc D is set by the user. If set, the control unit 16 determines to adopt the multi-pulse recording modulation method as the recording modulation method (step Sa).
7).

As described above, the control unit 16 identifies the type of the optical disc D, and when the recording linear velocity range corresponding to the optical disc D includes the recording linear velocity set by the user, the single pulse is used. It is decided to perform recording by the recording modulation method. If the recording linear velocity range corresponding to the optical disc D does not include the recording linear velocity set by the user, it is determined to perform recording by the multi-pulse recording modulation method.

B2: Test recording According to the recording modulation method thus determined, the control section 16 performs test recording prior to actual recording. The content of the test recording is similar to that of the conventional optical disk recording apparatus, and is executed to determine the laser light power for actual recording. FIG. 6 is a flow showing the control content of the control unit 16 when performing test recording.

First, the control unit 16 prepares for test recording in the test recording area prepared in advance on the optical disc D (step Sc1). Specifically, the control unit 16 controls the servo circuit 13 to drive the optical disc D at a constant linear velocity so that the recording linear velocity specified by the user is achieved. Then, the control unit 16 uses the encoder 17
In addition to outputting a signal for test recording, the laser power control circuit 20 is controlled to change the recording power in 15 steps.

As described above, the control unit 16 controls each unit of the apparatus to record the EFM signal for one subframe for one recording laser power value in the recording speed line set by the user, for a total of 15 units. EFM for frame
Perform test recording to record signals (step Sc
2).

After the test recording is completed, the control section 16 reproduces the test recorded area (step Sc3), and based on the β value detected by the β detection circuit 24 at the time of reproduction,
The optimum recording laser power P0 value at the recording speed at which the test recording was performed is determined (step Sa4). Specifically, the recording laser power value corresponding to the condition of β value (target β value) previously determined by the standard of the optical disc D or the like is determined as the optimum recording laser power.

Here, in the present embodiment, when performing the test recording, the control section 16 determines the optimum recording laser power by using the same recording modulation method as the recording modulation method at the time of the actual recording, so that the actual production is performed. The optimum recording power for recording can be determined.

B3: The actual recording control section 16 controls each part of the apparatus so as to meet the conditions of the recording modulation method and the optimum recording power determined as described above, and actually performs the actual recording. Specifically, the control unit 1
Reference numeral 6 controls the servo circuit 13 to rotationally drive (CLV drive) the optical disc D at the recording linear velocity designated by the user. Next, the encoder 17 is caused to output a signal for actual recording, and the laser power control circuit 20 is controlled to control each part of the apparatus so as to obtain the determined recording modulation method and the optimum recording laser power to execute the actual recording. To do.

C: Effects As described above, according to the optical disc recording apparatus 100 of the present invention, the optical disc D is compatible with a recording linear velocity which is not compatible with the optical disc D, for example, a range of 10 to 24 times the standard velocity. On the other hand, even when the recording is performed at the 1 × speed out of the range, since the control unit 16 selects the optimum recording modulation method and performs the real recording, the high-quality recording can be performed. .

D: Modified Example The above-described embodiment is merely one embodiment of the present invention, and can be arbitrarily modified within the scope of the spirit of the present invention. For example, the following modifications are possible.

<Modification 1> In the above-described embodiment, an optical disk corresponding to a range of 1 to 24 times the standard speed and 10 to 24 times the standard speed is assumed as a high speed recording disk. The speed range may be other than this. For example, 1 to 24 times the standard speed, 4 to 24 times the standard speed
It may be a case where optical disks corresponding to linear velocities such as double, 6 to 24 times, and 10 to 24 times are mixed. Even in this case, as shown in FIG. 7, if a table showing the relationship between the ID information and the corresponding recording linear velocity range is prepared in advance, the above-described embodiment can be applied as it is, The same effect can be achieved.

<Modification 2> In the above-described embodiment, the multi-pulse modulation method is such that, when one pit is formed on the optical disc D, the laser is modulated so as to irradiate a plurality of pulses of laser light. When forming one pit, the number of pulses of laser light to be irradiated is arbitrary. For example, when forming one pit, two pulses of laser light may be emitted, or three pulses of laser light may be emitted. Further, the number of pulses may be changed according to the pit length to be formed. The mode may be changed according to the type of the optical disc D. Even in such a case, as shown in FIG. 8, the relationship between the ID information indicating the type of the optical disc D, the corresponding recording linear velocity range, and the mode of the multi-pulse modulation method at the recording linear velocity that does not correspond is shown. If the table is prepared in advance, the above-described embodiment can be applied as it is, and the same operational effect can be obtained.

<Modification 3> In the optical disk recording apparatus 100 according to the above-described embodiment, it is premised that the recording linear velocity is constant, that is, so-called CLV (Constant Linear Velocity) recording is performed, but the recording angular velocity is constant, so-called C.
The present invention can be applied to the case of performing AV (Constant Auglar Velocity) recording. Even in this case,
Similar to the above-described embodiment, a table showing the relationship between the ID information indicating the type of the optical disc D and the corresponding recording linear velocity range may be prepared in advance. When CAV recording is performed, the recording linear velocity changes from the inner circumference to the outer circumference of the optical disc, and the recording linear velocity changes in a high range.
The cases may be divided into cases where the optical disk is included in the corresponding recording linear velocity range and cases where it is not included. Specifically, if it is included in the recording linear velocity range, recording is performed by the single pulse recording modulation method, and if it is not included in the recording linear velocity range, recording is performed by the multi-pulse recording modulation method. The same effect as that of the embodiment described above can be obtained.

<Modification 4> The gist of the present invention is to perform recording within the range of the recording linear velocity corresponding to the type of the optical disk to be recorded, and to perform recording outside the range.
The method of recording laser light is different. Further, in the above-described embodiment, the laser light is controlled by different laser modulation methods such as the single pulse recording modulation method and the multi-pulse recording modulation method. As a modified example, a method of controlling the power value of the laser beam depending on the case where recording is performed within the range of the recording linear velocity corresponding to the type of the optical disc to be recorded and the case where recording is performed outside the range are described. It is possible to make them different. More specifically, the power function (recording linear velocity-optimum recording power value) is separately set when recording is performed within the range of the recording linear velocity corresponding to the type of optical disk and when recording is performed outside the range. Is obtained in advance and the recording power value is controlled according to the set recording linear velocity. FIG. 9 shows a first optical disc in the range of the recording linear velocity corresponding to an optical disc
And a second power function outside the range are schematically shown. In this way, by separately obtaining the power functions in advance, the laser light is used when recording is performed within the range of the recording linear velocity corresponding to the type of optical disk and when recording is performed outside the range. The power value of can be always optimally controlled, and high-quality recording can be performed.

<Fifth Modification> In the above-described embodiment, the CD-R is assumed as the optical disc D, but the present invention can be applied to other optical discs as long as it is an optical disc using an organic dye film. Can be applied. That is, the present invention can be applied to any optical disc in which the thickness of the dye film is changed according to the corresponding recording linear velocity to adjust the thermal sensitivity.

<Modification 6> In the above-described embodiment, the memory 30 of the control unit 16 has various control programs stored in advance. However, these programs are, for example, semiconductor memories, optical disks such as CD-ROM, MO (Magneto Optic), MD (Mini Disc).
Alternatively, the program may be stored in a recording medium such as a magneto-optical disk or a floppy (registered trademark) disk, and the program may be supplied to the memory of the optical disk recording apparatus 100 via these. Further, the method of installing such a program is also arbitrary, and may be installed in the optical disc recording apparatus 100 using the recording medium described above.
It can also be installed by using so-called net distribution, which is installed in the optical disc recording apparatus 100 via a network such as the Internet.

[0053]

As described above, according to the present invention, the CD-
High-quality recording can be performed on an optical disc such as R even when recording is performed at a recording linear velocity that the optical disc does not support.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical disc recording device 100 according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram for explaining a recording modulation method of the optical disc recording apparatus 100.

FIG. 3 is a conceptual diagram for explaining a recording modulation method of the optical disc recording apparatus 100.

FIG. 4 is a diagram schematically showing data contents stored in a memory 30 of the optical disc recording apparatus 100.

FIG. 5 is a flowchart showing an operation content of a control unit 16 of the optical disc recording apparatus 100.

FIG. 6 is a flowchart showing an operation content of a control unit 16 of the optical disc recording apparatus 100.

FIG. 7 is a diagram for explaining a modified example.

FIG. 8 is a diagram for explaining a modified example.

FIG. 9 is a diagram for explaining a modified example.

FIG. 10 is a diagram for explaining a modified example.

[Explanation of symbols]

10 ... Optical pickup, 11 ... Spindle motor,
12 ... RF amplifier, 13 ... Servo circuit, 14 ... Address detection circuit, 15 ... Decoder, 16 ... Control unit,
17 ... encoder, 18 ... strategy circuit, 19 ...
… Laser driver, 20… Laser power control circuit, 2
2 ... Envelope detection circuit, 23 ... C1 error detection circuit, 24 ... β detection circuit, 25 ... Jitter measurement circuit,
27 ... Level detection circuit, 100 ... Optical disk recording device.

Claims (10)

[Claims] 1. A data recording is performed by driving an optical disc so as to record at a set recording linear velocity and irradiating the optical disc with a laser beam to form a pit having a length corresponding to data. In the optical disc recording apparatus, an identifying means for identifying the type of the optical disc to be recorded and the laser beam when the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified type of the optical disc. And a laser control means for changing the modulation method of the optical disc recording apparatus. 2. The laser control means forms one pit when the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range than when it is included in the recording linear velocity range. The optical disk recording apparatus according to claim 1, wherein the total power of the laser light with which the laser beam is irradiated is increased. 3. The laser control means employs a modulation method of irradiating a single pulse laser beam to form one pit when the recording linear velocity is included in the recording linear velocity range. If the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified type of optical disc, a modulation method of irradiating a plurality of pulse laser beams to form one pit is adopted. The optical disk recording device according to claim 1, wherein 4. The optical disc identification information recording means for storing the type of the optical disc and the recording linear velocity range in association with each other.
5. The optical disc recording device according to any one of 1. 5. The method according to claim 1, wherein the identifying means identifies the type of the optical disc from a reproduction signal obtained by reproducing the lead-in area of the optical disc. Optical disk recording device. 6. The laser control means, even at the time of test recording performed to determine the power of the recording laser beam in the actual data recording, the recording linear velocity corresponds to the discriminating type of the optical disc. 6. The optical disk recording apparatus according to claim 1, wherein when the speed is lower than the minimum speed of the speed range, the modulation method of the laser light is changed. 7. A data recording is performed by driving an optical disc so as to record at a set recording linear velocity and irradiating the optical disc with a laser beam to form pits having a length corresponding to data. In the control method of the optical disc recording apparatus, an identification step for identifying the type of the optical disc to be recorded, and when the recording linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified optical disc type, A laser control step of changing the modulation method of the laser light, the method of controlling an optical disc recording apparatus. 8. The laser control step adopts a modulation method of irradiating a single pulse laser beam to form one pit when the recording linear velocity is included in the recording linear velocity range, 1 if the linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified optical disc type
8. The method for controlling an optical disk recording apparatus according to claim 7, further comprising the step of adopting a modulation method of irradiating a plurality of pulsed laser beams to form the pits. 9. A data recording is performed by driving an optical disc so as to record at a set recording linear velocity and irradiating the optical disc with a laser beam to form a pit having a length corresponding to data. A program for controlling an optical disk recording apparatus, comprising: an identification unit for identifying a type of an optical disk to be recorded, and a recording linear velocity minimum in a recording linear velocity range corresponding to the identified optical disc type. A program for causing a laser control unit to change the modulation method of the laser light when the speed is smaller than the speed. 10. The laser control means adopts a modulation method of irradiating a single pulse laser beam to form one pit when the recording linear velocity is included in the recording linear velocity range, 1 if the linear velocity is smaller than the minimum velocity of the recording linear velocity range corresponding to the identified optical disc type
10. A modulation method of irradiating a plurality of pulsed laser beams is used to form the pits of FIG.
The program described in.