JP2003272156A - Optical disk recording method, optical disk recording apparatus, and optical disk recording program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To acquire excellent quality of a reproduction signal by suppressing dispersion in conditions such as ambient temperature giving effects on recording of trial write data. <P>SOLUTION: In the case of recording data at a low ambient temperature of the optical disk recording apparatus, when the data are immediately reproduced just after the recording, a value β becomes greater, the recording laser power is small through the setting of a target value β, resulting in deteriorating the quality of a reproduction signal of the recording data. On the other hand, when the recorded data are reproduced after a lapse of a prescribed time after the recording of data, the value β reaches a proper value. When the recording laser power is set in matching with the target value β, the data can be recorded with an optimum recording laser power, resulting in obtaining data with proper quality of the reproduction signal. Thus, the optical disk recording apparatus of this invention reproduces data in a lapse of a prescribed wait time after recording of the data. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for improving the reproduction signal quality of data recorded on a write-once optical disc and a rewritable optical disc.

[0002]

2. Description of the Related Art OPC (Optimum Power Control) is generally performed when data is recorded on a write-once optical disc and a rewritable optical disc by an optical disc recording apparatus.
OPC is a method in which trial writing is performed before recording this data on an optical disc, the portion is read, and the optimum power is found according to a certain standard. That is, before recording this data on the optical disc, a test writing area PCA (Power Calibration Are prepared on the optical disc is prepared.
The test writing is performed in a), the test writing data recorded in the PCA is reproduced, the reproduction signal quality is measured, and the optimum values of the recording parameters such as the target β and the write strategy are set to obtain the optimum laser recording power. This is the method of seeking.

Further, in the conventional optical disk recording apparatus, in order to record the main data quickly, the OPC is set to be completed in the shortest possible time. That is, P
When the trial write data is recorded in the CA, the trial write data is immediately reproduced to measure the reproduced signal quality and the like, and the optimum values of the parameters such as the target β are set.

[0004]

When data is recorded on an optical disc by the above-mentioned optical disc recording apparatus, if the ambient temperature is low, it is possible to obtain optimum reproduction signal quality data even though OPC is performed. There was a problem that I could not do it. The operating environment of the optical disk recording device is generally specified to have an ambient temperature of + 5 ° C. to + 35 ° C. or 40 ° C. during operation. For example, when data is recorded on the optical disk by the optical disk recording device at an ambient temperature of + 5 ° C. As compared with the case where data is recorded on the optical disc at the ambient temperature of + 25 ° C., the quality of the reproduced signal becomes worse. Also, depending on the area,
At night in winter, the room temperature may be 0 ° C. or less, and the optical disk recording device may be used in a low temperature environment of + 5 ° C. or less, which is out of the standard. When data is recorded on the optical disk in such an environment, the reproduction signal quality becomes worse than when the ambient temperature is + 5 ° C.

Further, there is a problem that the reproduction signal quality of the optical disc varies depending on the type of the optical disc and the data recording speed when recording the trial writing data on the optical disc.

However, in order to solve such a problem, conventionally, in order to improve the reproduction signal quality of the recorded data according to the ambient temperature and the ambient humidity, switching the setting has not been considered. In other words, the conventional optical disc recording device takes into consideration the variation of the recording device itself, and the device recording parameter is set to have an average value or a standard drive value. Was. However, in order to improve the reproduction signal quality of the recorded data according to the ambient temperature, the ambient humidity, etc., it was not designed to switch the settings of the device recording parameters and the like.

Therefore, in order to solve the above-mentioned problems, the present invention is an optical disc recording in which a good reproduction signal quality is obtained with little variation due to conditions affecting recording of test writing data such as ambient temperature and ambient humidity. An object is to provide a method, an optical disc recording device, and an optical disc recording program.

[0008]

The present invention has the following structure as means for solving the above problems.

(1) A test writing step of recording test writing data on the optical disk before recording the main data on the optical disk, and a reproduction measuring step of reproducing the test writing data and measuring the reproduction signal quality. In the optical disc recording method including, the predetermined waiting time is provided between the reproduction measuring step and the trial writing step.

In this structure, before recording the main data on the optical disc, a test writing step of recording the trial writing data on the optical disc, and reproducing the trial writing data,
A predetermined waiting time is provided between the reproduction measurement step of measuring the reproduction signal quality. Therefore, if the trial writing data is recorded on the optical disc and is immediately played back, the playback signal quality may not be stable. However, by providing a predetermined waiting time between the trial writing process and the playback measurement process. Since the reproduction signal quality of the trial writing data is stable, it is possible to stably record the main data on the optical disk regardless of the ambient temperature, the ambient humidity, the state of the device, and the like.

(2) The waiting time is a run-up time for preparing the reproduction of the trial writing data before starting the reproduction measuring step.

In this structure, before starting the reproduction measuring step, the run-up time for preparing the reproduction of the trial writing data is set as the waiting time provided between the reproduction measuring step and the trial writing step. Therefore, it is possible to stably record the main data on the optical disc by adjusting the run-up time for preparing the reproduction of the trial writing data without providing a separate waiting time, and it is possible to reduce the OPC execution time. It can be shortened.

(3) It is characterized in that the length of the waiting time is changed according to a condition affecting recording of trial writing data.

In this structure, the length of the predetermined waiting time provided between the reproduction measuring step and the trial writing step is changed according to the condition affecting the recording of the trial writing data.
Therefore, it is possible to set the optimum waiting time length in accordance with the condition affecting the recording of the trial writing data.

(4) The conditions that affect the recording of the trial write data are ambient temperature, ambient humidity, the type of the optical disc on which the trial write data is recorded, the recording speed of the trial write data, the temperature of the optical disc, and the data on the optical disc. At least one of the temperature of the optical element for recording and the wavelength of the irradiation light of the optical element for recording data on the optical disk is included.

In this configuration, the ambient temperature and the ambient humidity when recording the trial writing data on the optical disc, the type of the optical disc on which the trial writing data is recorded, the recording speed of the trial writing data, the temperature of the optical disc, and the data recording on the optical disc. At least one of the temperature of the optical element used and the wavelength of the irradiation light of the optical element that records data on the optical disk is a condition that affects the recording of test write data. Therefore, it is possible to set the optimum waiting time length according to the individual conditions that affect the recording of the trial writing data, and it is possible to improve the recording quality of the main data.

(5) The waiting time is set to be longer as the ambient temperature is lower.

In this configuration, the lower the ambient temperature when recording the trial writing data on the optical disc, the longer the predetermined waiting time provided between the reproduction measuring step and the trial writing step. Therefore, the lower the ambient temperature, the more time it takes for the quality of the reproduced signal to stabilize, so even if the ambient temperature when recording test write data on an optical disc is low,
This data can be recorded stably.

(6) A test writing step of recording test writing data on the optical disk before recording the main data on the optical disk, and a reproduction measuring step of reproducing the test writing data and measuring the reproduction signal quality. And a parameter setting step of setting optimum recording parameters for recording data on the optical disk based on the measurement result of the reproduction signal quality, in the parameter setting step, the trial writing step. The target β is set to be larger as the ambient temperature at the time of recording the trial write data on the optical disk is lower.

With this configuration, in the parameter setting step of setting the optimum recording parameters such as the target β and the write strategy when recording the data on the optical disk, the test writing data is recorded on the optical disk in the trial writing step. The lower the ambient temperature when recording the trial write data, the larger the target β is set. Therefore, when the trial write data is recorded on the optical disc and played back immediately, the β value becomes larger as the ambient temperature becomes lower, so the target β at the time of recording this data is made smaller, and the target β is set so as to be the target β. If data is recorded, the reproduction quality of this data will be poor. However, the lower the ambient temperature, the larger the target β set in the parameter setting step is corrected. Therefore, when this data is recorded so that the corrected target β is obtained, good reproduction quality data may be obtained. It will be possible.

(7) Before recording this data on the optical disc, a data recording means for recording the trial writing data on the optical disc, a reproducing means for reproducing the trial writing data, and a reproduction signal quality of the trial writing data are recorded. Signal quality measuring means for measuring, parameter setting means for setting optimum recording parameters when recording the present data on the optical disk based on the measurement result of the reproduced signal quality, and control means for controlling the respective means. In an optical disc recording device equipped with
The control means is configured such that, after the data recording means records the trial writing data on the optical disc and a predetermined waiting time elapses,
It is characterized in that the reproducing means controls so as to reproduce the trial writing data.

In this structure, the control means of the optical disk recording apparatus, before recording this data on the optical disk,
The data recording means for recording the trial writing data on the optical disc records the trial writing data on the optical disc, and after a predetermined waiting time, the reproducing means for reproducing the trial writing data is controlled to reproduce the trial writing data. To do. Therefore, the same effect as (1) can be obtained.

(8) The control means sets the run-up time for the reproduction means to prepare for reproduction of the trial writing data as the waiting time.

In this structure, the control means of the optical disk recording apparatus sets the run-up time for the reproduction means to prepare for reproduction of the trial writing data as the waiting time. Therefore, the same effect as (2) can be obtained.

(9) The control means changes the length of the waiting time according to a condition affecting recording of the trial writing data.

In this structure, the control means of the optical disk recording device changes the length of the waiting time according to the condition affecting the recording of the trial writing data. Therefore,
The same effect as (3) can be obtained.

(10) The control means sets the ambient temperature, the ambient humidity, the type of the optical disc on which the trial writing data is recorded, the recording speed of the trial writing data, and the temperature of the optical disc as conditions affecting the recording of the trial writing data. The length of the waiting time is changed according to at least one of the temperature of the optical element for recording data on the optical disc and the wavelength of the irradiation light of the optical element for recording data on the optical disc.

In this configuration, as conditions that affect the recording of the trial write data, the ambient temperature and the ambient humidity at the time of recording the trial write data on the optical disc, the type of the optical disc on which the trial write data is recorded, and the trial write data According to at least one of the recording speed, the temperature of the optical disc, the temperature of the optical element for recording data on the optical disc, and the wavelength of the irradiation light of the optical element for recording data on the optical disc, the control means sets the length of waiting time. change. Therefore,
It is possible to set the optimum waiting time length according to the individual conditions that affect the recording of the trial writing data and the combined conditions thereof, and it is possible to improve the recording quality of the data.

(11) The control means makes the waiting time longer as the ambient temperature at the time of recording the trial writing data on the optical disk lower.

In this structure, the control means of the optical disk recording apparatus lengthens the waiting time as the ambient temperature at the time of recording the trial write data on the optical disk becomes lower. Therefore, the lower the ambient temperature, the more time it takes for the quality of the reproduced signal to stabilize. Therefore, even if the ambient temperature when recording the trial write data on the optical disc is low, this data can be stably recorded. .

(12) It is characterized in that a temperature detecting means for measuring and detecting at least one of the ambient temperature, the temperature of the optical disk and the temperature of the optical element is provided.

In this structure, the optical disk recording apparatus measures and detects at least one of the ambient temperature, the temperature of the optical disk, and the temperature of the optical element by the temperature detecting means. Therefore, it becomes possible to set the length of the waiting time according to at least one of the ambient temperature measured and detected by the temperature detecting means, the temperature of the optical disk, and the temperature of the optical element.

(13) Before recording this data on the optical disc, a data recording means for recording the trial writing data on the optical disc, and a reproducing means for reproducing the trial writing data,
Signal quality measuring means for measuring the reproduction signal quality of the trial writing data, and parameter setting means for setting optimum recording parameters for recording data on the optical disk based on the measurement result of the reproduction signal quality, In an optical disc recording device including a control unit that controls each unit,
The parameter setting means is set so that the target β increases as the ambient temperature when the trial write data is recorded on the optical disc by the data recording means decreases.

In this structure, the parameter setting means for setting the recording parameters such as the target β and the write strategy becomes larger as the ambient temperature when the test recording data is recorded on the optical disc by the data recording means becomes lower. To set. Therefore, when the trial write data is recorded on the optical disc and immediately reproduced, the β value seems to increase as the ambient temperature becomes lower, so the target β at the time of this data recording is set to be small, and this target β If this data is recorded such that the reproduction quality of this data becomes poor. However, the lower the ambient temperature, the larger the target β set in the parameter setting step is corrected. Therefore, when this data is recorded so that the corrected target β is obtained, good reproduction quality data may be obtained. It will be possible.

(14) Before recording this data on the optical disc, the control means of the optical disc recording apparatus controls the data recording means so as to record the trial write data on the optical disc, and waits for a predetermined waiting time. The procedure, the procedure of controlling the reproducing means to reproduce the trial writing data, the procedure of controlling the signal quality measuring means to measure the reproduced signal quality of the trial writing data, and the measurement result of the reproducing signal quality. Based on this, a procedure for controlling the parameter setting means so as to set the optimum recording parameter when recording the main data on the optical disc is executed.

In this structure, the control means of the optical disk recording apparatus, before recording this data on the optical disk,
The test recording data is recorded on the optical disc in the data recording means, and after waiting a predetermined waiting time, the reproducing means reproduces the trial writing data and the reproducing means reproduces the trial writing data. Then, the signal quality measuring means is caused to measure the reproduction signal quality of the trial writing data, and the parameter setting means is caused to set the optimum recording parameter for recording the present data on the optical disk based on the measurement result of the reproduction signal quality. . Therefore, by causing the optical disk recording apparatus to execute this program,
A predetermined waiting time can be provided, and the reproduction signal quality of the trial writing data can be stabilized.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION In order to study the measures against the above problems, the inventor conducted various experiments by changing the conditions for recording data. As a result, the ambient temperature and the ambient humidity when recording the trial write data on the optical disc, the type of the optical disc on which the trial write data is recorded, the recording speed of the trial write data, the temperature of the optical disc, and the optical element (semiconductor for recording the data on the optical disc (Laser) temperature, the wavelength of the irradiation light of the optical element that records data on the optical disc, and other conditions that affect the recording of the trial writing data, the trial writing data is changed by changing the reproduction timing of the recorded trial writing data. It was found that the quality of the reproduced signal was improved.

As an example, a case where the reproduction timing of the trial writing data is changed when the ambient temperature of the optical disk recording device is low will be described. FIG. 1 is a graph showing the change in β value when the reproduction timing is changed after recording the trial write data. As shown in FIG. 1A, test writing (test recording) is performed, for example, by changing the recording power in 15 steps in one test recording, and an EFM signal for one subcode frame per one recording power. Is recorded, and the EFM signals for a total of 15 subcode frames are recorded. At this time, when the test write data is recorded in a low temperature state of, for example, + 5 ° C. of the optical disk recording device, as shown in FIG. The value is generally larger than the proper value. If the target β value is set in this state,
The recording laser power setting becomes a value smaller than the optimum recording laser power. Therefore, the main data is recorded with a laser power smaller than the optimum recording laser power, the reproduction signal quality of the record data becomes poor, and in the worst case, the main data cannot be read.

On the other hand, if the trial write data is not reproduced immediately after recording but is reproduced after a predetermined time has elapsed, the β value becomes an appropriate value. If the target β is set from this β value and the recording laser power is set so that the reproduction signal quality becomes this target β, the data can be recorded with the optimum recording laser power, so that the proper data of the reproduction signal quality is obtained. Can be obtained.

In the experiment conducted by the inventor, the ambient temperature was 0 ° C.
When data was recorded on an optical disc of a certain type at 8 times speed, the results shown in FIG. 2 were obtained. Figure 2
FIG. 6 is a graph showing changes in β value when the reproduction timing is changed after recording trial write data, and changes in optimum recording laser power at the β value. As shown in FIG. 2A, in the conventional method in which the trial write data is reproduced immediately after recording, the elapsed time until the data is reproduced is about 0.5 seconds.
In this case, the β value of the trial writing data is + 4%, and the optimum recording laser power is 15 mW. Further, when the time from recording the trial writing data to reproducing the trial writing data is gradually extended, the β value of the trial writing data gradually decreases accordingly. Then, it was found that the β value becomes stable and becomes a constant value after a certain period of time. In the case of FIG. 2A, the β value is stable within 2.3 seconds after recording the trial writing data. The β value at this time is −6%, and the optimum recording laser power is 15.7 mW.

When the main data is recorded with the above recording laser power, the reproduction signal quality is
β = −6%, jitter = 40 (nsec), and C1 error = 150 (frame / sec). on the other hand,
When the data is reproduced 2.3 seconds after the data is recorded, the reproduction signal quality is β = + 4%, jitter = 27.
(Nsec), C1 error = 0 (frame / sec)
Met. As described above, it was found that the reproduction signal quality can be improved by changing the reproduction timing after recording the trial write data.

When the ambient temperature is 30 ° C., data is recorded on a certain type of optical disk under the same conditions, the trial write data is reproduced immediately after the recording, and the data is reproduced after a predetermined waiting time. The same β value was found, and no change in β value was observed with the passage of time.

Furthermore, the conditions affecting the recording of the trial write data are not limited to the ambient temperature when recording the trial write data on the optical disk, but the ambient humidity and the trial when recording the trial write data on the optical disk. The type of optical disc that records write data, the recording speed of test write data, the temperature of the optical disc, the temperature of the optical element that records data on the optical disc, the wavelength of the irradiation light of the optical element that records data on the optical disc, etc. It was found from the results of the experiment that the recording was affected.

Therefore, based on such experimental results,
In the present invention, the optical disc recording device is configured as follows. The present invention is applicable to a write-once optical disc such as a CD-R and a DVD-R that can record data only once, and a CD-R.
The present invention is applicable when data is recorded on a rewritable optical disc such as W, DVD-RW, DVD + RW, and DVD-RAM that can be rewritten.
Take -R as an example.

[First Embodiment] FIG. 3 is a block diagram showing a configuration of an optical disk recording apparatus according to an embodiment of the present invention. As shown in FIG. 3, the optical disc recording apparatus 1
Is an optical pickup 10, spindle motor 11, RF
Amplifier 12, servo circuit 13, ATIP detection circuit 14,
Decoder 15, control unit 16 which is parameter setting means and control means, encoder 17, strategy circuit 18, laser driver 19, laser power control circuit 20, frequency generator 21, envelope detection circuit 22, reproduction signal quality reproduction means. Signal quality detection circuit unit 24, storage unit 2
5. Temperature (humidity) detection unit 2 which is temperature or humidity detection means
6, an operation unit 27, and a display unit 28. Further, the optical pickup 10, the servo circuit 13, the encoder 17, the strategy circuit 18, the laser driver 19, and the laser power control circuit 20 constitute a recording unit 29 which is a data recording means. Furthermore, the optical pickup 10
The RF amplifier 12 constitutes a reproducing unit 30 which is a data reproducing unit.

The spindle motor 11 is a motor for rotationally driving the optical disk D on which data is recorded. An optical disk holding mechanism (not shown) including a turntable for holding (chucking) an optical disk is provided at the tip of the rotary shaft of the spindle motor.

The optical pickup 10 includes an optical system such as a laser diode, a lens and a mirror, and return light (reflected light).
It is provided with a light receiving element, a focus servo mechanism, and the like. Also, the laser light is emitted from the optical disc D during recording and reproduction.
To the EDM (Eight to Fourteen Modulati)
on) The modulated RF signal is output to the RF amplifier 12.
The focus servo mechanism is a servo mechanism for keeping the distance between the lens of the optical pickup 10 and the data surface of the optical disk constant. Also, the optical pickup 10
A monitor diode is provided, and a current is generated in the monitor diode by the return light of the optical disc D, and this current is supplied to the laser power control circuit 20.

The frequency generator 21 is the spindle motor 1
The rotation angle and the number of rotations output by 1 are detected, and the signal is output to the servo circuit 13.

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 ATIP detection circuit 1.
4, the envelope detection circuit 22, the reproduction signal quality detection circuit section 24 for measuring the reproduction signal quality, and the decoder 15.

The decoder 15 EFM-modifies the RF signal supplied from the RF amplifier 12 during reproduction.
It demodulates to generate reproduction data and outputs it to the storage unit 25.
Further, the decoder 15 performs EFM demodulation of the RF signal supplied from the RF amplifier 12 at the time of recording, when reproducing the area recorded by the test recording.

In the optical disc recording apparatus 1 according to the present embodiment, when recording data, test recording is performed in the PCA (Power Calibration Area) area on the inner peripheral side of the optical disc D prior to the main recording. Then, based on the reproduction result of the test-recorded area, the recording condition for good recording on the optical disc D is obtained.

Here, the area where the test recording is performed on the optical disc D will be described with reference to FIG. FIG. 4 is a sectional view showing the area configuration of the optical disc. The outer diameter of the optical disc D is 120 mm, and the diameter of the optical disc D is 46 to 5
A section of 0 mm is prepared as the lead-in area 114,
A program area 118 and a residual area 120 for recording data are prepared on the outer peripheral side thereof. On the other hand, on the inner peripheral side of the lead-in area 114, the inner peripheral side PCA area 112 is formed.
Is prepared. Further, in the inner PCA area 112, a test area 112a, a count area 112b,
Is prepared. In this test area 112a, the test recording is performed prior to the main recording as described above. Here, as the test area 112a, an area in which test recording can be performed a plurality of times is prepared. Also, the count area 1
An EFM signal indicating which part of the test area 112a has been recorded when the test recording is completed is recorded in 12b. Therefore, when performing test recording on this optical disc D next time, the E of the count area 112b is
By detecting the FM signal, it is possible to know from which position in the test area 112a the test recording should be started. In the optical disc recording apparatus 1 according to the present embodiment, test recording is performed on the test area 112a before the main recording of data.

Returning to FIG. 3, the storage unit 25 includes the decoder 15
The reproduction data of the optical disc D output from the optical disc D, the data input from the outside of the optical disc recording device 1, and the like are temporarily stored. Then, during reproduction, the stored data is output to a data reproducing unit (not shown), and when the data is recorded on the recording optical disk, the stored data is output to the encoder 17.

The ATIP detection circuit 14 includes an RF amplifier 12
The wobble signal component included in the RF signal supplied from is extracted and used for the time information (address information) of each position included in the wobble signal component, the identification information (disc ID) for identifying the optical disc, and the disc. The control unit 16 decodes the information indicating the type of the disc, such as the coloring matter.
Output to. Here, the wobble signal component is a signal component representing the meandering frequency of the meandering recording track of the recording optical disk, and the time information and the identification information are recorded by FM-modulating the meandering frequency.

The reproduction signal quality detection circuit section 24 calculates the β value and asymmetry relating to the reproduction signal quality from the RF signal supplied from the RF amplifier 12 while reproducing the test recording area of the optical disc D, and calculates The result is controlled by the control unit 16
Output to. Here, the β value is obtained by β = (a + b) / (ab) where a is the peak level (sign is +) of the EFM-modulated signal waveform and b is the bottom level (sign is −). You can

Before performing test recording on the optical disc D, the envelope detection circuit 22 detects the portion of the test region 112a of the optical disc D from which the test recording is to be started.
Detect the envelope of the EFM signal at 2b.

The servo circuit 13 includes the spindle motor 11
Rotation control, focus control, tracking control, and feed control of the optical pickup 10. In the optical disc recording apparatus 1 according to the present embodiment, at the time of recording, a CAV (Cons
tant Angular Velocity) method and CLV (Constant Lin Velocity) method that drives the optical disk D at a constant linear velocity.
ear Velocity) method and can be switched. Therefore, the servo circuit 13 is controlled by the control unit 1.
CAV system and CLV according to the control signal supplied from
Switch between methods. Here, C by the servo circuit 13
In the AV control, the rotation speed of the spindle motor 11 detected by the frequency generator 21 is controlled so as to match the set rotation speed. In addition, C by the servo circuit 13
In the LV control, the spindle motor 11 is controlled so that the wobble signal in the RF signal supplied from the RF amplifier 12 has the set speed multiplication factor.

The encoder 17 EFM-modulates the recording data supplied from the storage unit 25 and outputs it to the strategy circuit 18. The strategy circuit 18 performs time axis correction processing and the like on the EFM signal supplied from the encoder 17, and outputs the EFM signal to the laser driver 19. Laser driver 1
Reference numeral 9 drives the laser diode of the optical pickup 10 according to the signal modulated according to the recording data supplied from the strategy circuit 18 and the control of the laser power control circuit 20.

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
Is based on the current value supplied from the monitor diode of the optical pickup 10 and the information indicating the target value of the optimum laser power supplied from the control unit 16, and the laser light having the optimum laser power is detected by the optical pickup 10 The laser driver 19 is controlled so that the light is emitted from.

The control unit 16 includes a CPU, ROM, and RA.
Each unit of the optical disc recording apparatus 1 is controlled according to a program stored in the ROM. Further, as described above, the control unit 16 controls each unit of the apparatus to perform test recording on a predetermined area of the optical disc D set in the optical disc recording apparatus 1 prior to the main recording of data. Then, in the control unit 16, the optical disc recording apparatus is based on the reproduction signal quality such as the β value detected by the signal quality detection circuit unit 24 from the signal obtained while reproducing the above-mentioned test recorded area. Good recording with no recording error is performed by obtaining the relationship between the reproduction signal quality and the device recording parameters (recording conditions) such as the target β and the write strategy for the optical disc D on which the test recording has been performed. A recording speed determination process for obtaining a recordable speed that can be performed is performed.

The storage unit 25 is for storing data obtained in advance through experiments and the like. The temperature detector 26 is for measuring and detecting the ambient temperature of the optical disc recording apparatus 1, the temperature of the optical disc, the temperature of the semiconductor laser, and the like. The optical disc temperature detector 2
6 ', the optical element in the optical pickup, and the temperature detecting section 26 "of the laser diode may be individually provided.
The operation unit 27 is for performing an operation of recording data on the optical disc. The display unit 28 is for displaying contents to be transmitted to the user, such as contents of operations performed on the operation unit 27.

The temperature detecting section 26 may be provided not in the optical disk recording apparatus 1 but in the host apparatus (not shown) for connecting the optical disk recording apparatus 1.

Next, the operation of the optical disk recording apparatus 1 when recording data on the optical disk D will be described. The optical disk recording apparatus 1 of the present invention, as a OPC before recording this data on the optical disk, performs a test writing step of recording test writing data on the optical disk, and reproduces the test writing data,
A reproduction measurement step of measuring the reproduction signal quality and a parameter setting step of setting optimum recording parameters for recording data on the optical disk based on the measurement result of the reproduction signal quality are sequentially performed. Further, a predetermined waiting time is provided between the trial writing process and the reproduction measuring process. That is, regardless of the conditions that affect the recording of the trial writing data, the reproduction measuring step is set to be performed after a certain waiting time after the trial writing step. As a result, the reproduction signal quality is stabilized regardless of the conditions that affect the recording of the trial write data, and thus the present data can be recorded with a good reproduction signal quality.

Further, the predetermined waiting time set in the optical disk recording apparatus 1 can be set so as to change the run-up time until the reproducing section 30 reads the data recorded on the optical disk. That is, in the optical disc recording apparatus 1, when the data is reproduced, the tracing is performed from before the start address of the data, but the running time is set as the waiting time to adjust the length of the running time. Therefore, it is not necessary to separately provide a blank time as the waiting time.

Here, as described with reference to FIG. 2, depending on the conditions that affect the recording of the trial write data, there may be cases where the waiting time is not provided or the waiting time is short. Therefore, by changing the length of the predetermined waiting time according to the condition that affects the recording of the trial writing data, it is possible to shorten the time required for OPC and prevent the wasteful time setting. it can.

For example, depending on the ambient temperature, the waiting time is 2 seconds at 0 ° C. or lower, and the waiting time is 1 second at 0 ° C. to 10 ° C.
The waiting time may be set to 0.5 seconds at 10 ° C. to 30 ° C., and the waiting time may be set to 0 seconds at 30 ° C. or more, so that the length of the waiting time is changed.

As described above, the conditions affecting the recording of the trial write data include the ambient temperature and the ambient humidity when recording the trial write data on the optical disc, the type of the optical disc on which the trial write data is recorded, and the trial write data. Recording speed, the temperature of the optical disc, the temperature of the optical element that records data on the optical disc, the wavelength of the irradiation light of the optical element that records data on the optical disc, and the like. Just change it.

For example, it is preferable to measure and detect the ambient temperature of the optical disk recording apparatus 1 and set the waiting time to be longer as the ambient temperature is lower according to the ambient temperature. Also,
Since the moisture absorption state of polycarbonate, which is a material for forming an optical disc, differs depending on the ambient humidity of the optical disc recording device 1, it is preferable to set the length of the waiting time depending on the ambient humidity of the optical disc recording device 1. Furthermore, depending on the type of optical disc on which the trial write data is recorded, there are some types that require a long waiting time, some types may have a short waiting period, and so on. It is good to set the length of waiting time. In addition, even when data is recorded on the same type of optical disc, the time until the reproduction signal quality stabilizes varies depending on the recording speed of the trial write data. Therefore, it is advisable to set the length of the waiting time according to the recording speed of the trial writing data recorded on the optical disc.

Even when the ambient temperature is 25 ° C., the time until the reproduction signal quality becomes stable after recording the trial write data on the optical disc differs depending on whether the optical disc temperature is 0 ° C. or 25 ° C. It becomes a thing. Therefore, in this case as well, the waiting time may be changed according to the situation. Furthermore, until the reproduction signal quality β value stabilizes depending on the temperature of the semiconductor laser (optical element) that records data on the optical disc, the wavelength of the laser light (irradiation light) emitted from the semiconductor laser that records data on the optical disc, and the like. Time is different. Therefore, it is necessary to set a predetermined waiting time length according to these conditions.

Incidentally, it is advisable to carry out an experiment in advance to acquire the experimental data according to the conditions affecting the recording of the trial writing data, and to set the waiting time based on the experimental data. That is, it is preferable to store the acquired experimental data in the storage unit 25 and to refer to the data in the storage unit 25 when the control unit 16 sets the recording parameter. Of the conditions that affect the recording of multiple test writing data as described above, the waiting time may be set by performing an experiment for a single condition, but a composite experiment may be performed for a plurality of conditions. By setting the waiting time, it is possible to further improve the reproduction signal quality of the recorded data.

Next, a data recording operation of the optical disk recording apparatus according to the first embodiment of the present invention will be described with reference to a flowchart. FIG. 5 is a flowchart for explaining an example of the operation of the optical disc recording apparatus according to the first embodiment of the present invention.

First, the user is a CD-R for recording data.
Is set in the optical disk recording apparatus 1, and the operation unit 27 is operated to record data. The control unit 16 is a CD-
When R is set and it is detected that the operation unit 27 is operated (s1), the servo is automatically adjusted to determine the type of the set recording optical disk. And
The controller 16 outputs predetermined signals to the servo circuit 13, the laser power control circuit 20, and the encoder 17, respectively. With these signals, laser light is emitted from the optical pickup 10 to the recording optical disc, and the returned light is received by the light receiving element of the optical pickup 10, converted into an electric signal, and output to the RF amplifier 12. The signal amplified by the RF amplifier 12 is output to the ATIP detection circuit 14, the ATIP detection circuit 14 detects ATIP information (address information), and is output to the control unit 16 (s2). The control unit 16 determines the type of the optical disc based on this signal, calls the data pattern of the device recording parameter from the storage unit 25, and subsequently measures and detects the ambient temperature of the optical disc recording device 1 by the temperature detection unit 26. (S3).

Then, based on this data and the experimental data stored in advance in the storage unit 25, the apparatus recording parameters related to the reproduced signal quality and the length of waiting time are set (s4).

Next, the servo circuit 1 is used to perform OPC.
3, a predetermined signal is output to each of the laser power control circuit 20 and the encoder 17, and test recording of test write data is performed on the PCA (s5). Then, the control unit 16 waits for a predetermined waiting time that has been set (s6), reproduces the test recorded portion after the waiting time has elapsed, and the return light is received by the light receiving element of the optical pickup 10 and converted into an electrical signal. The converted and converted signal is output from the RF amplifier 12 to the signal quality detection circuit section 24 (s7). Control unit 16
Sets the optimum laser power based on the signal output from the signal quality detection circuit unit 24. Then, the control unit 16 outputs the data to be recorded on the recording optical disc output from the host device (not shown) (s8). This data is irradiated as laser light from the optical pickup 10 via the encoder 17, the strategy circuit 18, and the laser driver 19, and the data is recorded on the optical disk (s
9). When the data recording is completed, the optical disc recording apparatus 1 displays on the display unit 28 that the data recording is completed, and ends the process (s10).

Here, in the optical disc recording apparatus 1, by executing a predetermined program, it is possible to execute the operation described using the above flow chart. That is, in the optical disc recording apparatus 1, before recording this data on the optical disc, the data recording means for recording the trial writing data on the optical disc, the reproducing means for reproducing the trial writing data, and the reproduction signal quality of the trial writing data are recorded. Signal quality measuring means for measuring, parameter setting means for setting optimum recording parameters for recording the main data on the optical disk based on the measurement result of the reproduced signal quality, controlling the above means, and recording the data. The recording means writes the trial writing data on the optical disc, and after a predetermined waiting time has elapsed, the reproducing means executes a program for functioning as control means for controlling the reproduction of the trial writing data. The operations described using the flowchart can be executed.

Further, the operation described with reference to the above-mentioned flow chart can be executed even in the configuration normally provided in the optical disk recording apparatus. Therefore, by executing the above program on an existing optical disk recording device,
It can be set to operate the optical disk recording apparatus of the present invention. If the host device to which the existing optical disk recording device is connected is equipped with a temperature detection unit that detects the ambient temperature, the length of the waiting time can be adjusted according to the ambient temperature.

[Second Embodiment] Next, a second embodiment of the present invention will be described. The optical disk recording apparatus according to the second embodiment of the present invention has the configuration shown in FIG. 3 as in the first embodiment. In the first embodiment, the length of the waiting time is set to be changed, but in the second embodiment, instead of providing the waiting time, the OPC is performed according to the condition affecting the recording of the trial writing data. It is set to correct the β value obtained as a result. For example, in the example shown in FIG.
When the optical disk recording device 1 reproduces the trial write data immediately after recording the optical disk, the β value becomes larger than the stable value as the ambient temperature becomes lower. In this case, the relation between the ambient temperature and the elapsed time of the recorded data and the change of the β value is obtained in advance by experiment, and the target β value is set based on the elapsed time after the trial writing and the ambient temperature. As a result, the target β can be corrected according to the ambient temperature without providing a waiting time, and OPC can be completed in a short time. Further, the measured β value of the trial writing data may be corrected according to the ambient temperature.

Next, a data recording operation of the optical disk recording apparatus according to the second embodiment of the present invention will be described with reference to a flowchart. FIG. 6 is a flowchart for explaining an example of the operation of the optical disc recording apparatus according to the second embodiment of the present invention.

First, the user is a CD-R for recording data.
Is set in the optical disk recording apparatus 1, and the operation unit 27 is operated to record data. The control unit 16 is a CD-
When it is detected that R is set and the operation unit 27 is operated (s11), the servo is automatically adjusted in order to determine the type of the set recording optical disk. Then, the control unit 16 controls the servo circuit 13, the servo circuit 13,
A predetermined signal is output to each of the laser power control circuit 20 and the encoder 17. With these signals, laser light is emitted from the optical pickup 10 to the recording optical disc, and the returned light is received by the light receiving element of the optical pickup 10, converted into an electric signal, and output to the RF amplifier 12. This signal amplified by the RF amplifier 12 is
The signal is output to the detection circuit 14 and is output by the ATIP detection circuit 14.
The TIP information (address information) is detected and output to the control unit 16 (s12). The control unit 16 determines the type of the optical disc based on this signal, and calls the data pattern of the device recording parameter indicating the reproduction signal quality from the storage unit 25 (s13).

Then, based on this data, the apparatus recording parameters relating to the reproduced signal quality are set (s1
4). Subsequently, predetermined signals are output to the servo circuit 13, the laser power control circuit 20, and the encoder 17 to perform OPC, and test recording is performed on the PCA. Also,
The ambient temperature of the optical disk recording device 1 is measured and detected by the temperature detection unit 26 (s15).

Next, the test recorded portion is reproduced, the return light is received by the light receiving element of the optical pickup 10 and converted into an electric signal, and the amplified signal is output from the RF amplifier 12 to the signal quality detection circuit. Output to the unit 24 (s1
6). The control unit 16 is based on the signal output from the signal quality detection circuit unit 24, the ambient temperature of the optical disc recording device 1 detected by the temperature detection unit 26, and the experimental data prestored in the storage unit 25. The target β is set, and further the laser power is set so that the reproduction signal quality becomes the target β. Then, the control unit 16 outputs the data to be recorded on the recording optical disc output from the host device (not shown) (s17). This data is irradiated as laser light from the optical pickup 10 via the encoder 17, the strategy circuit 18, and the laser driver 19, and the data is recorded on the optical disc (s18). When data recording is completed,
The optical disc recording apparatus 1 displays on the display unit 28 that data recording is completed, and ends the process (s1).
9).

[0082]

According to the present invention, when the trial writing data is recorded on the optical disk and is immediately reproduced, the reproduction signal quality may not be stable, but between the trial writing process and the reproduction measuring process. By providing a predetermined waiting time, the reproduction signal quality of the trial writing data becomes stable, so that this data can be stably recorded on the optical disk regardless of the ambient temperature, ambient humidity, the state of the device, and the like.

Even if a waiting time is not separately provided, the data can be stably recorded on the optical disk by adjusting the run time for preparing the reproduction of the trial writing data, and the OPC execution time Can be shortened.

Further, it is possible to set the optimum waiting time length in accordance with the condition affecting the recording of the trial writing data. In addition, the lower the ambient temperature, the more time it takes for the quality of the reproduced signal to stabilize. Therefore, even if the ambient temperature when recording the trial write data on the optical disc is low, the data can be stably recorded.

Further, when the trial write data is recorded on the optical disc and reproduced immediately, the β value becomes larger as the ambient temperature becomes lower, so that the target β at the time of recording the main data becomes smaller and becomes the target β. If you record this data like this,
Although the reproduction quality of this data becomes poor, the target β set in the parameter setting step is corrected to be larger as the ambient temperature is lower.
When this data is recorded so as to satisfy the above condition, it is possible to obtain data with good reproduction quality.

Furthermore, the length of the waiting time can be set according to at least one of the ambient temperature measured and detected by the temperature detecting means, the temperature of the optical disk, and the temperature of the optical element.

[Brief description of drawings]

FIG. 1 is a graph showing a change in β value when a reproduction timing is changed after recording test writing data.

FIG. 2 is a graph showing changes in β value when the reproduction timing is changed after recording the trial write data, and changes in the optimum recording laser power at the β value.

FIG. 3 is a block diagram showing a configuration of an optical disc recording device according to first and second embodiments of the present invention.

FIG. 4 is a cross-sectional view showing an area configuration of an optical disc.

FIG. 5 is a flow chart for explaining an example of the operation of the optical disc recording apparatus according to the first embodiment of the present invention.

FIG. 6 is a flowchart for explaining an example of the operation of the optical disc recording device according to the second embodiment of the invention.

[Explanation of symbols]

1-optical disk recording device 10-Optical pickup 16-control unit 20-Laser power control circuit 24-Reproduction signal quality detection circuit section 25-storage unit

Continued front page    F-term (reference) 5D090 AA01 BB03 BB04 CC01 EE11                       HH01 JJ12 KK03                 5D119 AA23 BA01 BB02 BB03 DA01                       HA19 HA30 HA45                 5D789 AA23 BA01 BB02 BB03 DA01                       HA19 HA30 HA45

Claims (14)

[Claims] 1. Before recording this data on an optical disc,
An optical disc recording method comprising: a test writing process of recording test writing data on the optical disc; and a reproduction measuring process of reproducing the test writing data to measure a reproduction signal quality. An optical disk recording method, characterized in that a predetermined waiting time is provided between the steps. 2. The optical disk recording method according to claim 1, wherein the waiting time is a run-up time for preparing reproduction of test writing data before starting the reproduction measuring step. 3. The optical disk recording method according to claim 1, wherein the length of the waiting time is changed according to a condition affecting recording of the trial write data. 4. The conditions affecting the recording of the trial writing data are ambient temperature, ambient humidity, type of optical disc for recording the trial writing data, recording speed of the trial writing data, temperature of the optical disc, recording data on the optical disc. 4. The optical disk recording method according to claim 3, further comprising at least one of the temperature of the optical element for performing the recording and the wavelength of the irradiation light of the optical element for recording data on the optical disk. 5. The optical disc recording method according to claim 1, wherein the waiting time is set longer as the ambient temperature is lower. 6. Before recording this data on an optical disc,
A test writing process of recording test writing data on the optical disc, a reproduction measuring process of reproducing the trial writing data to measure a reproduction signal quality, and a data writing to the optical disc based on the measurement result of the reproduction signal quality. In the optical disc recording method including a parameter setting step of setting an optimum recording parameter for recording the data, the lower the ambient temperature when the test writing data is recorded on the optical disc in the trial writing step in the parameter setting step, An optical disc recording method characterized by setting a large target β. 7. Before recording this data on an optical disc,
Data recording means for recording the trial writing data on the optical disk, reproducing means for reproducing the trial writing data, signal quality measuring means for measuring the reproduced signal quality of the trial writing data, and a measurement result of the reproduced signal quality. On the basis of the above, in an optical disc recording apparatus comprising parameter setting means for setting optimum recording parameters for recording the present data on the optical disc, and control means for controlling each of the means, the control means comprises: After the recording means records the trial writing data on the optical disc and a predetermined waiting time elapses,
An optical disk recording apparatus, wherein the reproducing means controls so as to reproduce test writing data. 8. The optical disk recording apparatus according to claim 7, wherein the control unit sets a run-up time at which the reproducing unit prepares to reproduce the trial write data as the waiting time. 9. The optical disk recording apparatus according to claim 7, wherein the control unit changes the length of the waiting time according to a condition affecting recording of the trial writing data. 10. The control means, as conditions affecting the recording of the test writing data, ambient temperature, ambient humidity, type of optical disk for recording the test writing data, recording speed of the test writing data, temperature of the optical disk, The length of the waiting time is changed according to at least one of a temperature of an optical element for recording data on the optical disc and a wavelength of irradiation light of the optical element for recording data on the optical disc. 9. The optical disc recording device according to item 9. 11. The optical disk recording apparatus according to claim 7, wherein the control unit lengthens the waiting time as the ambient temperature when recording the trial write data on the optical disk is lower. 12. The optical disk recording apparatus according to claim 10, further comprising a temperature detecting unit that measures and detects at least one of an ambient temperature, an optical disk temperature, and the optical element temperature. 13. Before recording this data on an optical disc, a data recording means for recording trial writing data on the optical disc, a reproducing means for reproducing the trial writing data, and a reproduction signal quality of the trial writing data are measured. Signal quality measuring means, a parameter setting means for setting optimum recording parameters for recording data on the optical disk based on the measurement result of the reproduced signal quality, and a control means for controlling the above respective means. In the optical disc recording apparatus provided with the optical disc recording device, the parameter setting unit sets the target β to be larger as the ambient temperature when the test recording data is recorded on the optical disc by the data recording unit is lower. apparatus. 14. A control means of an optical disk recording apparatus, before recording this data on the optical disk, a procedure for controlling the data recording means so as to record trial write data on the optical disk, and a procedure for waiting a predetermined waiting time. A procedure for controlling the reproducing means so as to reproduce the trial writing data, a procedure for controlling the signal quality measuring means so as to measure the reproduced signal quality of the trial writing data, and a procedure based on the measurement result of the reproducing signal quality. And a procedure for controlling the parameter setting means so as to set an optimum recording parameter when recording this data on the optical disk, and an optical disk recording program for executing the procedure.