JPH08329469A - Data recorder - Google Patents

Abstract

PURPOSE: To shorten the time required for data recording operation by detecting whether or not the identification data same as the identification data are recorded on a recording medium and controlling a laser drive means and a movement means with a control means. CONSTITUTION: Whether or not the disk ID are recorded on an optical disk 7 is detected. When the disk ID are recorded on the optical disk 7 by the detection result, whether or not the disk ID same as the disk ID of the optical disk are recorded on a memory 47. Then, an optical pickup 40 and a thread mechanism 44 are controlled so that a data signal is recorded based on a recording parameter. When no disk ID are recorded on the optical disk 7, the optical pickup 40 and the thread mechanism 44 are controlled so that the data signal is recorded after the disk ID of the disk 7 are decided, and the recording parameter of the optical disk is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording device for recording a data signal on an optical recording medium.

[0002]

2. Description of the Related Art Conventionally, in a data recording apparatus for recording a data signal on an optical recording medium, information can be recorded by irradiating a disk-shaped recording medium with laser light to form pits in sequence. There is also an optical disc device, and as the optical disc device, for example, a CD compliant with the standard of compact disc, so-called CD (Compact Disc)
-There is an R (CD-Recordable) drive device.

The optical disc used in this CD-R drive device is irradiated with intense laser light, and the optical properties of the recording layer between the pregrooves, which are the guide grooves formed in advance, are changed so that the optical disc is used only once. It is a so-called write-once type optical disc capable of recording information.

On this optical disc, an operation of recording music data for a plurality of songs, that is, a data of a plurality of tracks continuously only once (Disc at once) and a recording operation for each data of one track are performed. By performing the track additional recording operation or the divided data obtained by dividing the data of one track into several pieces, that is, the packet data, that is, the in-track additional recording operation of recording the data of one song by so-called packet recording, Make a record.

FIG. 13 shows a schematic recording format of this optical disk. This optical disc is provided with a program area PG for recording audio data and the like, and a TOC (Table of Cons.
lead-in area LI including tents), and
A lead-out area LO is provided on the outer peripheral side of the program area PG.
Is provided. Further, on the inner peripheral side of the lead-in area LI, a program storage area PMA for recording the recording state of the program area PG and a power control area PCA for adjusting the laser driving power are provided.

Further, the power control area PCA is an OPC which is performed prior to data recording during one data recording operation.
This is an area used for (Optimum Power Control) operation, that is, for laser drive power calibration operation.

The power control area PCA comprises a test writing area located on the inner peripheral side and a count area located outside the test writing area. The trial writing area is 1500
The size of the subcode frame is the size of the subcode frame, and the count area is the size of 100 subcode frames. As shown in FIG. 14, this sub-code frame is composed of a frame synchronization pattern unit 86, a sub-coding unit 87, a data and parity unit 88, which is a collection of 98 so-called EFM frames. 1/7 at speed
It is a frame for 5 seconds.

This test writing area is divided into 100 areas, and each divided area is called a partition. The count area is also divided into 100 areas like the trial writing area, and each divided area is called a partition. OP
In the C operation, each partition of the trial writing area and the count area is used as a unit.

Next, the OPC operation will be described.

In this OPC operation, first, the partition in the count area in which the identification data is recorded by the previous OPC operation is detected. Next, by detecting the partition in the trial writing area corresponding to the detected partition of the count area, the current OPC is detected.
The partition in the trial writing area where the trial writing data is recorded is detected by the operation. Then, for each sub-code frame in the partition, the trial write data is recorded while sequentially switching the output of the laser driving power for recording. Next, the asymmetry value is detected from each RF signal obtained by reproducing the trial write data recorded with different laser driving powers. The optimum asymmetry value is selected from the plurality of detected asymmetry values, and the laser drive power at the time of recording the trial write data having the optimum asymmetry value is determined as the optimum laser drive power for recording. After that, random data is recorded in the partition in the count area corresponding to the partition in the test write area in which the test write data is recorded. Data is recorded in each partition in the trial writing area and the count area from the inner circumference side to the outer circumference side of the optical disc.

Specifically, for example, when the identification data is recorded up to the third partition in the count area by performing the OPC operation, the test data is recorded up to the third partition in the trial writing area. Recorded and used.

As described above, each partition in the count area has a one-to-one correspondence with each partition in the test writing area, and one partition in the test writing area and one partition in the count area are used by one OPC operation. If the data has been recorded in a certain partition in the count area, it indicates that the partition in the trial writing area corresponding to this partition has also been used.

[0013]

By the way, as described above, in the CD-R drive device, one OPC operation is performed during data recording. Moreover, one partition in the trial writing area is used in one OPC operation. The number of partitions in this trial writing area is 100.
Therefore, it can be performed on one optical disc.
The PC operation can be performed up to 100 times.

Here, the maximum number of tracks that can be recorded on one optical disk is 99 tracks.
Therefore, when the recording operation is performed only once or when the track additional recording operation is performed, the number of data recording operations does not exceed 100, so that the maximum number of OPC operations is 1.
There is no problem in the data recording operation even if it can be performed only 00 times.

However, when the in-track additional recording operation is performed, the data recording operation is performed a plurality of times to record the data for one track. Therefore, the number of data recording operations for one optical disk is 100 or more. May be.
However, in the conventional OPC operation, OPC is performed 100 times or more.
Since the operation cannot be performed, the data recording is performed without performing the OPC operation in the data recording operation 100 times or more. The quality of the data recorded without performing the OPC operation is lower than the quality of the data recorded by performing the OPC operation.

Therefore, in view of the above situation, the present invention can perform the data recording operation without deteriorating the quality of the recorded data even when the data recording operation is performed 100 times or more on one optical disk. The present invention provides a data recording device capable of

[0017]

A data recording apparatus according to the present invention comprises a laser irradiation means for irradiating an optical recording medium with a laser beam, a laser driving means for driving the laser irradiation means, and the laser irradiation. Moving means for moving the means relative to the optical recording medium, identification data for identifying the optical recording medium, and recording parameters used when recording the data signal on the optical recording medium. And a storage means for storing and detecting whether or not the identification data is recorded on the optical recording medium, and further, based on the detection result, if the identification data is recorded on the optical recording medium, It is detected whether or not the same identification data as the identification data of the optical recording medium is stored in the storage means, and the storage means stores the optical data in the storage means based on the detection result. When the same identification data as the identification data of the recording medium is stored, the laser driving means is configured to record the data signal based on the recording parameter stored corresponding to the detected identification data. And controlling the moving means, and when the identification data is not recorded on the optical recording medium, the identification data of the optical recording medium is determined and the recording parameters of the optical recording medium are obtained. The above-mentioned problem is solved by providing a control means for controlling the laser driving means and the moving means so as to record the data signal later.

In the data recording apparatus according to the present invention, a laser irradiating means for irradiating the optical recording medium with a laser beam, a laser driving means for driving the laser irradiating means, and the laser irradiating means for the optical The moving means for moving the optical recording medium relative to the recording medium, and whether or not the identification data of the data recording device currently in use is recorded on the optical recording medium. When the identification data of the data recording device is recorded on the optical recording medium, the data signal is recorded so as to record the data signal based on the recording parameter recorded corresponding to the detected identification data. When the identification data is not recorded on the optical recording medium by controlling the laser driving means and the moving means, the recording parameters of the optical recording medium are controlled. After obtaining the chromatography data, for solving the above problems by providing a control means for controlling the laser driving means and the moving means so as to record the data signal.

[0019]

According to the present invention, the identification data for identifying the optical recording medium recorded on the optical recording medium is read out and whether the same identification data as the identification data is stored in the storage means or not. When the identification data is stored, the control means controls the laser driving means and the moving means based on the recording parameters stored corresponding to the identification data, thereby recording the recording parameters. The data recording operation is performed without newly requesting.

Further, it is detected whether or not the same identification data as the identification data stored in the data recording device is recorded on the optical recording medium. If the identification data is recorded, the identification data is recorded. The control unit controls the laser driving unit and the moving unit based on the recording parameter recorded corresponding to the data, thereby performing the data recording operation without newly obtaining the recording parameter.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a data recording device according to the present invention.

In this data recording device, a laser diode 1 which is a laser irradiation means for irradiating a laser beam to an optical disk 7 which is an optical recording medium, and an optical pickup 40 which is a laser driving means for driving the laser diode 1 are provided. A sled mechanism 44 that is a moving unit that moves the laser diode 1 relative to the optical disc 7, a disc ID that is identification data for identifying the optical disc 7, and the data signal to the optical disc 7. A memory 47, which is a storage unit that stores a recording parameter used for recording, and whether or not a disc ID is recorded on the optical disc 7 are detected, and the disc ID is recorded on the optical disc 7 based on the detection result. If it is recorded, the disk of the optical disk 7 is stored in the memory 47. It is detected whether or not the same disk ID as the ID is stored. As a result of this detection, when the same disk ID as the disk ID of the optical disk 7 is stored in the memory 47, the detected disk is detected. The optical pickup 40 and the sled mechanism 44 are controlled so as to record the data signal based on the recording parameter stored corresponding to the ID, and when the disc ID is not recorded on the optical disc 7. A CPU 24 which is a control means for controlling the optical pickup 40 and the sled mechanism 44 so as to record the data signal after determining the disc ID of the optical disc 7 and obtaining the recording parameters of the optical disc 7. Is.

When the drive ID, which is the identification data of the data recording device, is used, the CPU 24 of the data recording device determines whether the drive ID of the data recording device currently in use is recorded on the optical disk 7. If the drive ID of the data recording device is recorded on the optical disc 7 based on the detection result, it is determined based on the recording parameter recorded corresponding to the detected drive ID. , The optical pickup 40 and the sled mechanism 44 are controlled to record the data signal, and when the drive ID is not recorded on the optical disc 7, the data is obtained after obtaining the recording parameters of the optical disc 7. The optical pickup 40 and the sled mechanism 44 are controlled so as to record a signal.

In FIG. 1, the laser light emitted from the laser diode 1 is collimated by the collimation lens 2 and guided to the objective lens 6 through the grating 3 and the beam splitter 4, and the objective lens 6 causes the optical disk 7 to travel. Focused on top.

A part of the light beam incident on the beam splitter 4 is separated by the beam splitter 4 and incident on the laser monitor 5. The light beam incident on the laser monitor 5 is photoelectrically converted, and a current value according to the amount of light is obtained. This current value is sent to the monitor head amplifier 30, converted into a voltage value, and further sent to the automatic power control (APC) circuit 31.

The APC circuit 31 uses the signal from the monitor head amplifier 30 to control the amount of laser light emitted from the laser diode 1 to be constant without being affected by external factors such as temperature. It is a thing. This AP
The control signal from the C circuit 31 is sent to the laser modulation circuit 29. The laser modulation circuit 29 is the same as the APC circuit 31.
The laser diode 1 is driven by the laser drive power based on the control signal from the.

The reflected light of the laser beam irradiated on the optical disk 7 is incident on the beam splitter 4 via the objective lens 6. The beam splitter 4 guides the reflected light to the multi-lens 8. The multi-lens 8 is composed of a cylindrical lens, a condenser lens, etc., and condenses the reflected light on the photodetector 9.

The output from the photo detector 9 is converted into a voltage value by the head amplifier 10 and output to the matrix circuit 11. In the matrix circuit 11, the tracking error signal TE, the focus error signal FE, and the push-pull signal PP are generated by adding / subtracting the output from the head amplifier 10. The tracking error signal TE and the focus error signal FE are sent to the phase compensation circuits 12 and 13, respectively.

The tracking error signal TE whose phase has been adjusted by the phase compensation circuit 12 is sent to the drive circuit 14. The drive circuit 14 operates the tracking actuator 16 based on the tracking error signal TE from the phase compensation circuit 12. As a result, tracking control of the objective lens 6 with respect to the optical disk 7 is performed.

The focus error signal FE whose phase has been adjusted by the phase compensation circuit 13 is sent to the drive circuit 15. The drive circuit 15 includes the phase compensation circuit 13 described above.
The focus actuator 17 is operated based on the focus error signal FE from. As a result, focus control of the objective lens 6 on the optical disk 7 is performed.

The low frequency component of the tracking error signal TE is sent to the sled phase compensation circuit 32 for phase compensation and then sent to the drive circuit 33. In the drive circuit 33, the position of the sled mechanism 44 is controlled to move by driving the sled motor 34 using the signal from the sled phase compensation circuit 32.

The push-pull signal PP output from the matrix circuit 11 is output to the wobble detection circuit 21. In the wobble detection circuit 21, the optical disk 7
Preformed wobble signals along the physical tracks of the ATIP (Absolute Time In Pre-gro
ove) is output to the demodulator 22. This ATIP
The demodulator 22 detects the ATIP information and the ATIP read clock signal from the wobble signal.

This ATIP information is the time obtained from the absolute address information signal pre-recorded on the optical disk 7, and is a frame unit having a length equal to the subcode frame for 1/75 seconds at the reference linear velocity. It is configured. This frame is called an ATIP frame.

The ATIP information and the ATIP read clock signal are sent to the ATIP decoder 23. This A
In the TIP decoder 23, the address information is reproduced using the ATIP information and the ATIP read clock signal. This address information is supplied to the CPU 24.

The wobble signal detected by the wobble detection circuit 21 and the ATIP read clock signal detected by the ATIP demodulator 22 are also output to the spindle servo circuit 25. This spindle servo circuit 2
Reference numeral 5 drives the spindle motor 27 via the motor driver 26 using the wobble signal and the ATIP read clock signal. At this time, the spindle servo circuit 25 controls the wobble signal detected by the wobble detection circuit 21 so as to have a constant frequency of 22.05 kHz, or the ATIP read clock signal output from the ATIP modulator 22 is output. 6.35
The control is performed so that the constant frequency is kHz.

The RF signal output from the matrix circuit 11 is sent to the binarization circuit 18 and binarized.
It is sent to the PLL circuit 19 as a digitized signal. This PLL
In the circuit 19, a clock signal is generated from the binarized signal, and this clock signal is sent to the decoder circuit 20 together with the binarized signal. The decoder circuit 20 decodes the binarized signal based on the clock signal.
As a result, the data signal and the subcode are reproduced.
The reproduced data signal is output from the output terminal 42.
Further, the sub code is sent to the CPU 24.

The clock signal reproduced by the PLL circuit 19 is input to the spindle servo circuit 25 and compared with the reference clock signal. Then, this comparison output is sent to the motor driver 26 as a rotation error signal. The motor driver 26 controls the drive of the spindle motor 27 based on the rotation error signal.

The above-described operation is performed both when reproducing data from the optical disk 7 and when recording data on the optical disk 7.

At the time of recording data on the optical disc 7, the RF detection circuit 45 reproduces data in a predetermined area on the optical disc 7 so that the data is recorded on the optical disc 7 based on the RF signal output from the matrix circuit 11. Whether or not data is recorded is detected, and this detection signal is detected as C
Supply to the PU 24.

FIG. 2 shows an embodiment of a schematic structure of the RF detection circuit 45, and the RF detection circuit 45 is also shown.
3 shows a timing chart of each signal in
The operation of the RF detection circuit 45 will be described.

As shown in FIG. 3A, the signal level of the RF signal reproduced from the recording area in which the data is recorded changes, but the signal level of the RF signal reproduced from the unrecorded area is almost the same. It is constant. This RF signal is
By passing through a high pass filter (HPF) 55, 0
The signal is as shown in FIG. 3B centering on the level.
The output signal from the HPF 55 is input to the comparator 56.

The comparator 56 slices the output signal at a predetermined slice level. This allows
As shown in FIG. 3C, the recording area has a period of 3T to 11T.
It becomes a binary signal of "0" and "1" according to the signal of the pulse width of, and the pulse width becomes longer than the period 11T in the unrecorded area, and the output signal always becomes "1". This output signal is input to the pulse width detection circuit 57.

From the pulse width detection circuit 57,
When the pulse width of the binarized signal is shorter than the period 11T, it becomes "1" indicating that it is a reproduced signal from the recording area,
When the pulse width of the binarized signal is longer than the period 11T, it indicates that the signal is a reproduced signal from an unrecorded area.
Then, the detection signal is output. This detection signal is shown in D of FIG.

Next, a flow chart of a first embodiment of a specific operation procedure of data recording in this data recording apparatus is shown in FIG. 4 and will be described below.

In the data recording operation according to the first embodiment, the data recording device is provided with the disc ID of the optical disc,
Recording parameters obtained by the OPC operation performed on this optical disc are stored, and at the time of data recording, recording parameters corresponding to the same disc ID as the disc ID recorded on the optical disc, which is stored in the data recording device. Based on the above, the data recording operation is performed without performing the OPC operation.

First, in step S1, it is determined whether or not the optical disk 7 is inserted. Whether or not the optical disk 7 is inserted is determined according to the detection result from the disk detector 37. This disk detector 3
7 can be configured by a photo coupler or the like.
The detection result from the disk detector 37 is sent to the CPU 24.

When the CPU 24 determines that the optical disk 7 is inserted, a command from a host computer (not shown) for data recording operation, an input device connected to this data recording device, etc. If the command etc. is input, the process proceeds to step S2 and it is determined whether or not the disc ID is recorded in the optical disc 7. This disc ID is recorded in the program storage area PMA in the optical disc 7.

Here, the program storage area PMA will be described. In this program storage area PMA, FIG.
Data is recorded by the subcode frame indicated by 4. Further, the format of the subcode Q channel frame in the subcoding unit 87 in this subcode frame is as shown in FIG. This subcode Q
The channel frame is a 2-bit synchronization block 11
1, 4-bit control block 112, 4-bit address block 113, 72-bit data block 11
It consists of 4- and 16-bit CRC blocks 115. The data of the synchronization block 111 is a signal indicating the synchronization of the sub-coding unit 87 of FIG. Also,
Data indicating the type of data to be recorded is recorded in the control block 112, and the address block 113 is recorded.
The mode value indicating the type of data recorded in the data block 114 is recorded in the CRC block 115.
Data for performing error detection of a cyclic code (Cyclic Redundancy Check Code) is recorded in.

The data block 114 is shown in FIG.
, Each 8-bit track number part 121, index part 122, elapsed time minute component part 123, elapsed time second component part 124, elapsed time frame number part 125, 0
It includes a unit 126, an absolute time minute component unit 127, an absolute time second component unit 128, and an absolute time frame number unit 129. The values of the above parts are the two-digit binary coded decimal system (Binary C
oded Decimal (BCD).

When the value of the address block 113 in FIG. 5 is 1, that is, when the mode is 1, the track number portion 1
The track number is recorded in 21 and the elapsed time component part 1
23, the elapsed time / second component section 124, and the elapsed time frame number section 125 record the value of the end time of the recorded data, and the absolute time minute component section 127, the absolute time second component section 128, and the absolute time frame are recorded. In the number portion 129, the start time of the recorded data on the optical disc 7 is recorded. In this subcode Q channel frame, a subcode Q channel frame of the same data is recorded 10 times, and in the 0 part 126, a value from 0 to 9 is recorded to indicate the number of times of recording. Has been done.

When the value of the address block 113 is 2, that is, when the mode is 2, the elapsed time minute component portion 123, the elapsed time second component portion 124, and the elapsed time frame number portion 125 are provided with a 6-digit BCD. The expressed disc ID is recorded. Therefore, the disc ID is 0
It is possible to take 1,000,000 kinds of values from to 999999. The value of this disk ID is the CPU 24
Is generated by a random number by the CPU2
4 generates random numbers so that 1,000,000 kinds of values have the same probability as possible. At this time, the absolute time second component section 128 indicates the type of the optical disc. The type of this optical disc is expressed by a hexadecimal number, and when this value is "00", it indicates a CD-DA or CD-ROM disc, and "1".
When it is 0 ', it indicates a CD-I disc, and when it is'20', it indicates a CD-ROM XA disc. Also, “0” is recorded in the track number part 121, the index part 122, the absolute time component part 127, and the absolute time frame number part 129.

When data recording is performed, the data of all the subcode Q channel frames in the program recording area PMA described above are read and stored. At this time, the CPU 24 sends a control signal to the drive circuit 33 to control the sled motor 34 and drive the sled mechanism 44 to drive the optical pickup 40 to the optical disk 7.
Move in the radial direction. As a result, the optical pickup 40 is moved to the program storage area PMA of the optical disc 7. Further, the CPU 24 sends a control signal to the APC circuit 31 to drive the laser diode 1 with the laser driving power for reproduction, and the optical pickup 40 reproduces and stores data of all sub-code Q channel frames. .

Thereafter, it is detected whether or not the value of the address block 113 in all the stored subcode Q channel frames is 2. As a result, when the subcode Q channel frame whose value in the address block 113 is 2 is detected, it is determined in step S2 that the disc ID is already recorded in the optical disc 7, and the process proceeds to step S3. .

In step S3, the disc ID in the detected subcode Q channel frame is read out and the value of this disc ID is stored in the memory 47.

On the other hand, if the subcode Q channel frame whose address block 113 has a value of 2 is not detected, it is determined in step S2 that the disc ID is not recorded in the optical disc 7, and the process proceeds to step S4. At this time, no data is recorded on the optical disc 7, or data is recorded by a data recording device that does not record the disc ID.

In step S4, the CPU 24 generates a random number to determine the value of the disc ID of the optical disc 7.

Then, in step S5, the OPC operation is performed.

Here, a concrete signal generation at the time of data recording and reproduction will be described.

At the time of data recording, EFM is added to the recorded data.
By applying (Eight to Fourteen Modulation),
A modulated signal B1 is generated as shown in A of FIG. 7 in which the occurrence probabilities of logic 0 and 1 are equal. Laser light is emitted from the laser diode with reference to the modulation signal B1, and the optical disk 7 is intermittently irradiated with laser light corresponding to the logical level of the modulation signal B1. As a result, a region having a low reflectance, that is, a pit is formed in the recording layer between the pregrooves. At this time, the laser diode is driven at a high output.

The modulated signal B1 is generated so that the H level and the L level are continuous in the range of the period 3T to 11T with reference to the reference period T. As a result, as shown in FIG. 7B, pits P are sequentially formed and data is recorded. The region where the pits P are not formed and which has a high reflectance is called a land.

During data reproduction, the laser diode 1 is driven at a low output to irradiate the optical disk 7 with the emitted laser light. Optical disk 7 irradiated with laser light
The reflected light from is received by the photo detector 9. According to the amount of the reflected light, a reproduction signal whose signal level changes as shown by C in FIG. 7, that is, an RF signal is obtained. Then, the reproduction data D1 shown by D in FIG. 7 is detected by detecting the signal level of the RF signal with reference to the slice level SL.

At this time, since the modulated signal B1 is generated by the EFM and the occurrence probabilities of the logic 0 and 1 are equal, the slice level SL is selected so that the probabilities of the logic 0 and 1 are also equal in the reproduction data D1.

On the other hand, at the time of data recording, even if the laser diode 1 is driven with a constant power to emit the laser beam, the size of the pit is changed depending on the change of the ambient temperature and the change of the laser wavelength. Change.

Therefore, at the time of data recording, the driving power of the laser diode 1 is sequentially switched by the OPC operation to record the trial writing data in the trial writing area of the optical disc, and the trial writing data is reproduced to reproduce the respective laser driving powers. The asymmetry value Asy in is detected. Then, from these detected asymmetry values Asy, the asymmetry value Asy that is closest to the predetermined asymmetry value Asy is selected. Thereby, the drive power when the selected asymmetry value Asy is obtained is determined as the value of the optimum laser drive power of the laser diode 1,
At the same time, the target pit level can be obtained.

Here, the asymmetry value represents a time average ratio of pits and lands. Specifically, the RF signal reproduced from the optical disc has the waveform shown in FIG. 8, and the slice level SL at which the occurrence probabilities of logic 0 and 1 are equal to the reproduction data D1 shown in D of FIG. It is represented by the relationship between the peak level and the bottom level. That is, the asymmetry value Asy is calculated as follows by using the peak level X ₁ and the bottom level X ₄ of the signal having the pulse width of 11T and the peak level X ₂ and the bottom level X ₃ of the signal having the pulse width of 3T. It can be expressed by the equation (1).

[0066]

[Equation 1]

When obtaining the optimum laser driving power, the pit level is PL and the laser driving power value ratio is R.
If C, the reflectance ratio is HC, and the target pit level is PR _i , the following equation (2) is established.

[0068]

[Equation 2]

Here, the laser drive power value ratio RC
Can be expressed by the following equation (3), _where R _n is the current target laser drive power value and R _i is the optimum laser drive power value.

[0070]

(Equation 3)

The reflectance ratio HC can be expressed by the following equation (4), _where H _n is the current reflectance and H _i is the initial value of the reflectance.

[0072]

[Equation 4]

The current reflectance H _n can be expressed by the following equation (5), where LL is the land level and RO is the laser driving power for data reproduction.

[0074]

(Equation 5)

Next, the OPC operation will be specifically described.

Under the control of the CPU 24, the optical pickup 40 is moved to the count area, and the recording state of the identification data is detected to detect the use state of the trial writing area corresponding to the count area.

Next, under the control of the CPU 24, the switch 35 is switched to the terminal b side to connect with the memory 36, and the test data stored in the memory 36 is read out. This test data is sent to the laser modulation circuit 29 via the data encoder 28. In addition, the CPU 24
Controls the drive circuit 33 to move the optical pickup 40 to the power control area PCA of the optical disc 7, controls the APC circuit 31, and drives the laser diode 1 with a plurality of different laser driving powers. As a result, the test data read from the memory 36 is sequentially recorded in the power control area PCA of the optical disc 7 while changing the laser driving power.

After that, the test data recorded with each laser driving power is reproduced, and the RF obtained by this is reproduced.
The signal is sent to the asymmetry detection circuit 46. The asymmetry detection circuit 46 detects the asymmetry value at each laser drive power. The CPU 24 selects the asymmetry value closest to the target asymmetry value among the asymmetry values at each laser drive power detected by the asymmetry detection circuit 46, and optimizes the laser drive power value when this asymmetry value is obtained. Use laser drive power. The optimum laser drive power is stored in the memory 47 together with the target pit level and the optimum asymmetry value as a recording parameter when recording data on the optical disk 7 in association with the determined disk ID.

Thereafter, in step S8, the CPU 24
Data is recorded by controlling the APC circuit 31 so as to obtain the optimum laser driving power. During this data recording, the switch 35 is switched to the terminal a side and the signal input terminal 4
3, and data for recording is input from this signal input terminal 43. The input recording data is encoded by the data encoder 28 via the switch 35 and sent to the laser modulation circuit 29. In the laser modulation circuit 29, data is recorded by driving the laser diode 1 with the laser driving power based on the control signal from the APC circuit 31. At this time, continuous data recording and reproduction on the optical disc 7 are performed from the inner circumference side to the outer circumference side of the optical disc 7.

When the disc ID is not recorded on the optical disc 7 at the time of recording the data in step S8, first, 2 is written in the address block 113 of the subcode Q channel frame in the program storage area PMA.
After writing the value of the disc ID and the type of the optical disc determined above, data recording is performed.

As the memory 47, a volatile memory such as SRAM may be used. However, when a non-volatile memory such as EEPROM or Flash ROM is used to turn on / off the power of the data recording device. Also, when the data recording device is reset by a command from the host computer or the like, the disc ID and the recording parameter of the optical disc on which the data recording is performed can be stored in the data recording device.

In step S3, the optical disk 7
After storing the disk ID of the disk ID in the memory 47, the process proceeds to step S6, and the CPU 24 causes the CPU 24 to store the disk ID and the disk ID stored in the memory 47.
Disc ID in the table consisting of the following and recording parameters
Value is compared to determine whether or not a disk ID having the same value as the stored disk ID value exists in the table.

If it is determined that the disk ID having the same value as the stored disk ID does not exist in the table, the process proceeds to step S5. In step S5, the OPC operation is performed as described above to obtain the recording parameter, and the stored disk ID and the obtained recording parameter corresponding thereto are stored in the memory 47 as a table. Then, in step S8, data recording is performed based on the recording parameters.

If it is determined in step S6 that the same disc ID as the stored disc ID exists in the table, the process proceeds to step S7 to obtain the recording parameters from the table in the memory 47. Then, in step S8, data recording is performed based on this recording parameter.

Further, a flow chart of a second embodiment of the specific operation procedure of data recording in this data recording apparatus is shown in FIG. 9 and will be described below.

In the data recording operation according to the second embodiment, the drive ID of the data recording device that has recorded data on the optical disc and the recording parameters obtained by the OPC operation by the data recording device are performed in the optical disc. Are recorded as a table, and at the time of data recording, the drive ID having the same value as the drive ID of the data recording device that records the data on the optical disc.
The data recording operation is performed without performing the OPC operation based on the recording parameter corresponding to.

First, in step S11, it is determined whether or not the optical disk 7 is inserted based on the detection result from the disk detector 37. The detection result from the disk detector 37 is sent to the CPU 24.

When the CPU 24 determines that the optical disk 7 is inserted, a command from the host computer for a data recording operation, a command from an input device connected to the data recording device, or the like is transmitted. When it is input, the process proceeds to step S12, and it is determined whether or not the drive ID is recorded on the optical disc 7. The drive ID is recorded as a table in the data portion of the subcode frame of the program storage area PMA of the optical disc 7 together with the recording parameters obtained by the OPC operation of the data recording device that performed the data recording operation on the optical disc 7. Has been done.

The drive ID in the data recording device is
It is stored in a non-volatile memory in the data recording device at the time of manufacturing the data recording device, and specific contents may include a serial number and year / month / day / time at the time of manufacturing.

In step S12, under the control of the CPU 24, the optical pickup 40 is moved to the data portion of the subcode frame in the program storage area PMA recorded during the previous data recording operation, and all the data in this data portion is read. Read and store. Then, it is determined whether or not the table is recorded. As a result, if it is determined that the table is not recorded, step S14
Proceed to. At this time, no data is recorded on this optical disk 7, or data is recorded by a data recording device that does not store the drive ID.

In step S14, the OPC operation is performed,
The drive ID is read from the currently used data recording device, and the drive ID and the recording parameters by the OPC operation are used as a table to store the program storage area PMA.
It is recorded in the data section of.

On the other hand, if it is determined in step S12 that the table is recorded on the optical disk 7, the data of the drive ID in the table is read in step S13.

Thereafter, in step S15, it is determined whether or not the drive ID of the data recording device currently used is present in the read drive ID data.

As a result, the drive I of the data recording device is
If it is determined that the same data as the data of D does not exist in the data of the drive ID recorded on the optical disc 7, the data recording device currently in use is performing the data recording operation on the optical disc 7. There will be no. Therefore, the process proceeds to step S14, the OPC operation is performed, the drive ID is read from the currently used data recording device, and the drive ID and the recording parameter by the OPC operation are recorded as a table in the data part of the program storage area PMA. To do. And step S
At 17, the data is recorded based on the recording parameters.

Further, in step S15, the same data as the drive ID data of the data recording device is the optical disc 7
If it is determined that the data exists in the data of the drive ID recorded in, the process proceeds to step S16.

In step S16, a recording parameter corresponding to the drive ID of the data recording device currently in use in the table is obtained, and the data recording operation is performed. Then, in step S17, data recording is performed based on the recording parameters.

Incidentally, in the data recording apparatus, when performing the additional recording operation in the track, that is, the packet recording, it is possible to record the table including the drive ID and the recording parameter in the data by the packet recording. .

FIG. 10 shows the format of packet data recorded by packet recording. The data of one packet PC shown in FIG. 10 includes a link block LB for one sub-code frame indicating interruption and start of data, and 4 for compensating the reading of data.
Subcode frames run-(Run-in) blocks _{RIB 1, RIB 2, RIB 3} , RIB 4, the user data information data such as images and music are recorded block U
Runout block RO for two subcode frames for compensating for data recorded late in the area of DB and user data block UDB
It consists of B ₁ and ROB ₂ .

The format of each block is as follows.
This is shown in FIG. 11A is a CD-ROM
The format is defined by the mode 1 of the above, and includes a 12-byte synchronization section 131 and 4-byte header sections 132 and 204.
It is composed of an 8-byte user data section 133, a 4-byte EDC section 134, an 8-byte 0 data section 135, and a 276-byte ECC section 136. The header part 13
2 is a 1-minute minute component part 141, a second component part 142,
It is composed of a frame number section 143 and a mode section 144.
Further, B of FIG. 11 is a format according to the regulation of the mode 2 of the CD-ROM, which includes a 12-byte synchronization unit 151,
It is composed of a 4-byte header section 152 and a 2336-byte user data section 153. The header section 152
Is composed of a minute component portion 161, a second component portion 162, a frame number portion 163, and a mode portion 164 each having 1 byte. The synchronization patterns of the format data are recorded in the synchronization sections 131 and 151, and the header sections 132 and 15 are recorded.
2, the time of this format data is recorded, and the EDC unit 134 is recorded with an error detection code.
An error correction code is recorded in the CC section 136.

In the mode sections 144 and 164 of the formats shown in FIGS. 11A and 11B, the two least significant bits (LSB), bit 0 and bit 1, indicate the mode of this data format. The format data of 3 bits (MSB) bits 7 to 5 are the link block LB and the run-in block RIB.
_It shows which of the ₁ , ₁ , RIB ₂ , RIB ₃ , RIB ₄ , user data block UDB, and runout blocks ROB ₁ , ROB ₂ is data.

As described above, in the second embodiment, any one of the link block LB of the packet data, the run-in blocks RIB ₁ , RIB ₂ , RIB ₃ , RIB ₄ , the run-out blocks ROB ₁ and ROB ₂ is used. One type of block may be designated, and a table composed of drive IDs and recording parameters may be recorded in the user data section of all blocks of the designated type.

In the second data recording operation, each time the data recording operation is performed by the different data recording device, the data of the table read from the optical disk 7 and stored,
The drive ID of the data recording device and the value of the recording parameter which were performed this time are added to record the data in the table.

The data recording apparatus according to the present invention performs the data recording operation of any one of the above-mentioned first embodiment and second embodiment.

Further, when performing the data recording operation a plurality of times for one optical disc, the recording parameters obtained by the OPC operation at the time of the first data recording are stored, and the data recording after this is performed. At the time of operation, the OPC operation can be omitted by recording the data based on the stored recording parameters. The operation procedure of the data recording in the data recording apparatus at this time is the third embodiment, and this flowchart is shown in FIG. 12 and will be described below.

First, in step S21, the CPU 24 determines whether or not the disk replacement information is ON. Whether or not the optical disk 7 has been replaced is determined according to the detection result from the disk detector 37.
The disc exchange information is OFF until the optical disc 7 is exchanged.
It is designed to be N.

If it is determined in step S21 that the disc replacement information is ON, it means that no data recording operation has been performed since the optical disc 7 was mounted in the data recording device. In this case, the process proceeds to step S22, the OPC operation is performed, and the recording parameters are obtained. This recording parameter is stored in the memory 47. After that, the process proceeds to step S24, and the data is recorded based on the obtained recording parameter.

On the other hand, if it is determined in step S21 that the disk replacement information is OFF, step S2
In step 3, the recording parameters stored in the memory 47 are read out. Then, in step S24, data recording is performed based on the recording parameters.

As described above, it is possible to omit the OPC operation by using the exchange information of the optical disc.

[0109]

As is apparent from the above description, the data recording apparatus according to the present invention has a laser irradiating means for irradiating an optical recording medium with a laser beam and a laser driving means for driving the laser irradiating means. Means, moving means for moving the laser irradiation means relative to the optical recording medium, identification data for identifying the optical recording medium, and recording the data signal on the optical recording medium. Storage means for storing a recording parameter used when
Whether or not the identification data is recorded on the optical recording medium is detected, and further, when the identification data is recorded on the optical recording medium based on the detection result, the optical means is stored in the storage unit. It is detected whether or not the same identification data as the identification data of the optical recording medium is stored, and the detection result indicates that the same identification data as the identification data of the optical recording medium is stored in the storage means. Is, based on the recording parameters stored corresponding to the detected identification data, controls the laser driving means and the moving means to record the data signal,
When the identification data is not recorded on the optical recording medium, the identification data of the optical recording medium is determined, the recording parameter of the optical recording medium is obtained, and then the data signal is recorded. By providing the laser drive means and the control means for controlling the moving means, the same data can be obtained even if the optical disk is repeatedly taken in and out and the power of the data recording device is turned on and off many times. When the recording device performs the data recording operation on the same optical disc, the calculation operation of the recording parameter required for the data recording can be omitted, so that the maximum number of times of the conventional OPC operation, that is, 100 times or more of the data recording is performed. The quality of the recorded data can be maintained when the operation is performed. In particular, in packet recording, the number of data recording operations may be 100 times or more, so that the quality of recorded data at this time can be maintained. In addition, the time required for the data recording operation can be shortened by recording the data without performing the OPC operation.

Further, the data recording apparatus according to the present invention detects whether or not the identification data of the data recording apparatus currently in use is recorded on the optical recording medium, and based on the detection result, the optical recording medium is detected. When the identification data of the data recording device is recorded on the dynamic recording medium, the laser is used to record the data signal based on the recording parameter recorded corresponding to the detected identification data. When the identification data is not recorded on the optical recording medium by controlling the driving means and the moving means, the data signal is recorded after obtaining the recording parameter of the optical recording medium. By providing the laser driving means and the control means for controlling the moving means, the optical disk can be repeatedly taken in and out, and the power of the data recording device can be turned on / off. No matter how many times the FF is performed, when the same data recording device performs the data recording operation on the same optical disc, the calculation operation of the recording parameters necessary for the data recording can be omitted. The quality of the recording data can be maintained when the data recording operation is performed the maximum number of times of the OPC operation, that is, 100 times or more. In particular, in packet recording, the number of data recording operations may be 100 times or more, so that the quality of recorded data at this time can be maintained. In addition, the time required for the data recording operation can be shortened by recording the data without performing the OPC operation.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a data recording device according to the present invention.

FIG. 2 is a diagram showing a schematic configuration of an RF detection circuit.

FIG. 3 is a timing chart for explaining the operation of the RF detection circuit.

FIG. 4 is a flowchart of a first embodiment of a data recording operation procedure.

FIG. 5 is a diagram showing a format of a subcode Q channel frame.

FIG. 6 is a diagram showing a format of a data block of FIG.

FIG. 7 is a diagram showing signal waveforms and the like at the time of recording and reproducing data.

FIG. 8 is a diagram showing an asymmetry value of an RF signal.

FIG. 9 is a flowchart of a second embodiment of a data recording operation procedure.

FIG. 10 is a diagram showing a packet format.

11 is a diagram showing a format of each block in the packet of FIG.

FIG. 12 is a flowchart of a third embodiment of a data recording operation procedure.

FIG. 13 is a diagram showing a recording format of an optical disc.

FIG. 14 is a diagram showing a format of a subcode frame.

[Explanation of symbols]

 1 Laser Diode 7 Optical Disk 24 CPU 36 Memory 37 Disk Detector 40 Optical Pickup 44 Thread Mechanism 47 Memory

Claims (3)

[Claims] 1. A data recording device for recording a data signal on an optical recording medium, comprising: a laser irradiating means for irradiating the optical recording medium with a laser beam; and a laser driving means for driving the laser irradiating means. Moving means for moving the laser irradiation means relative to the optical recording medium, identification data for identifying the optical recording medium, and recording the data signal on the optical recording medium. Storage means for storing the recording parameters to be used and whether or not the identification data is recorded on the optical recording medium are detected, and further the identification data is recorded on the optical recording medium based on the detection result. In this case, it is detected whether or not the same identification data as the identification data of the optical recording medium is stored in the storage means. When the same identification data as the identification data of the optical recording medium is stored in the storage means, the data signal is recorded based on the recording parameter stored corresponding to the detected identification data. To control the laser driving means and the moving means,
When the identification data is not recorded on the optical recording medium, the identification data of the optical recording medium is determined, the recording parameter of the optical recording medium is obtained, and then the data signal is recorded. A data recording apparatus, further comprising: a control unit that controls the laser driving unit and the moving unit. 2. The data recording device according to claim 1, wherein the storage means is a non-volatile memory. 3. A data recording device for recording a data signal on an optical recording medium, comprising: a laser irradiating means for irradiating the optical recording medium with a laser beam; and a laser driving means for driving the laser irradiating means. Moving means for moving the laser irradiation means relative to the optical recording medium, and detecting whether or not the identification data of the data recording apparatus currently in use is recorded on the optical recording medium. If the identification data of the data recording device is recorded on the optical recording medium according to the detection result, the data is recorded based on the recording parameter recorded corresponding to the detected identification data. When the laser driving means and the moving means are controlled so as to record a signal and the identification data is not recorded on the optical recording medium, , After obtaining the recording parameters of the optical recording medium, data recording apparatus, characterized in that it comprises a control means for controlling the laser driving means and the moving means so as to record the data signal.