JP2009272036A - Recording apparatus, recording method and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem with a conventional optical disc that when a power calibration area is used up, the optimum power of a light beam is not detected. <P>SOLUTION: When the power calibration area is used up, the optimum power of a light beam is detected by performing power calibration in an outer power calibration area and recording is continued by using the light beam of the detected optimum power. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording apparatus and method, for example, a write once (WO: Write Once) type optical disc such as a CD-R (Compact Disc-Recordable) in which information can be written only once in the same location, and information repeatedly in the same location. The present invention is suitable for application to an optical disc apparatus that reads and writes data on a rewritable (RW) type optical disc such as a CD-RW.

  Conventionally, in this type of optical disc apparatus, recording data is recorded by irradiating an optical disc with a light beam modulated according to the recording data.

  By the way, when recording data is recorded by irradiating an optical disk with an optical beam as described above, the optical disk is formed when the intensity of the light beam exceeds a predetermined reference range corresponding to the recording speed and the material of the optical disk. Since the length of the recording mark is short (hereinafter, this phenomenon is referred to as asymmetry), noise may occur in the recording data reproduced based on this recording mark.

  Therefore, in this conventional optical disc apparatus, a power calibration area (PCA; provided on the innermost periphery of the optical disc) is provided for the purpose of suppressing the occurrence of asymmetry of recorded marks before recording the recording data on the optical disc. By making a trial write in the Power Calibration Area), the optimum light beam power for the recording speed and the material of the optical disk is detected, and recording data is recorded with the detected light beam power. ing. (Hereinafter, the work from trial writing to optimal power detection is called power calibration).

  However, in a write-once type optical disc apparatus such as a CD-R, the number of trial writings that can be power calibrated is limited to a maximum of 100 times.

  Therefore, in such an optical disc apparatus, when the power calibration area in the write-once type optical disc is used up, recording data is recorded on the optical disc with a light beam having a default power corresponding to the recording speed without performing power calibration from the next time. Or recording data is not recorded.

  However, when data is recorded on an optical disk with a light beam having a default power, there is a problem that noise is generated in the reproduced recorded data if the default power is greatly deviated from the optimum recording power corresponding to the recording speed. On the other hand, when recording data is not recorded, there arises a problem that recording data recorded on the optical disc cannot be added or updated again.

  Therefore, in such an optical disc apparatus, if the optimum power of the light beam can be detected even after the power calibration area is used up and recording can be performed with the light beam of the detected power, the reliability of data recording can be improved. Can be improved.

  The present invention has been made in view of the above points, and intends to propose a recording apparatus, a recording method, and a recording medium that can improve the reliability of data recording.

  In order to solve such a problem, in the present invention, in the recording apparatus, the trial writing means for trial writing the trial writing data in the trial writing area of the recording medium, and the trial writing data trial-written by the trial writing means are reproduced and reproduced. Detecting means for detecting the optimum power of the light beam based on the written test data, and the test writing means determines the test data from the test data area to another test data as necessary. Switch to area. As a result, according to this recording apparatus, it is possible to detect the optimum power of the light beam and continue recording with the detected light beam having the optimum power.

  According to the present invention, in the recording method, the first step of trial writing the trial writing data in the trial writing area of the recording medium, and reproducing the trial writing data that has been trial written, are performed based on the reproduced trial writing data. A second step for detecting the optimum power of the beam, and in the first step, the area for trial writing of the trial writing data is switched from the trial writing area to another trial writing area as necessary. did. As a result, according to this recording method, it is possible to detect the optimum power of the light beam and continue recording with the detected light beam having the optimum power.

  As described above, according to the present invention, in the recording apparatus, the trial writing means for trial writing the trial writing data in the trial writing area of the recording medium, and the trial writing data trial-written by the trial writing means are reproduced and reproduced. Detecting means for detecting the optimum power of the light beam based on the trial writing data, and the trial writing means changes the trial writing area of the trial writing data from the trial writing area to another trial writing area as necessary. By switching to, it is possible to detect the optimum power of the light beam and continue recording with the detected light beam of the optimum power, thus realizing a recording device that can improve the recording reliability on the recording medium it can.

  According to the present invention, in the recording method, the first step of trial writing the trial writing data in the trial writing area of the recording medium, and reproducing the trial writing data that has been trial written, are performed based on the reproduced trial writing data. A second step of detecting the optimum power of the beam. In the first step, when the trial writing area is used up, the trial writing data is written in the trial writing area as necessary. By switching from one area to another test writing area, it is possible to detect the optimum power of the light beam and continue recording with the detected light beam of the optimum power, thus improving the reliability of recording on the recording medium. A recording apparatus that can be improved can be realized.

It is a block diagram which shows the circuit structure of the optical disk apparatus by this Embodiment. It is a side view which shows the layout of an optical disk. It is a block diagram of 1 frame. It is a block diagram of 1 block. It is a figure which shows the logical format of Q channel. It is a figure which shows the content of Q channel data. It is a figure with which it uses for description of the trial writing in a power calibration area. It is a graph which shows the modulation process of power. It is a figure with which it uses for description of the trial writing in an outer power calibration area. It is a flowchart which shows the process sequence regarding power calibration. It is a flowchart which shows the process sequence regarding power calibration.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Configuration of Optical Disc Device According to Embodiment In FIG. 1, reference numeral 10 denotes an optical disc device according to this embodiment as a whole. 12 can be recorded or reproduced from the optical disk 12.

  Actually, in the optical disc apparatus 10, in the recording mode, data D1 sequentially given from the host computer 11 is taken in through the interface unit (such as SCSI) 20 and is sequentially stored in the buffer memory 22 through the encoder unit 21. To do.

  The encoder unit 21 includes a layered ECC (Error Correcting Code) addition processing unit 23, a CIRC (Cross Interleave Reed-Solomon Code) encoding processing unit 24, and an EFM (Eight to Fourteen Modulation) modulation processing unit 25. The stored data D1 is sequentially read out in units of sectors (2 [Kbytes] units), an error correction code is added to the data D1 by the layered ECC adding unit 23, and then the CIRC encoding processing unit 24 performs CIRC encoding processing and synchronization data After performing insertion processing and further performing EFM modulation in the EFM modulation processing unit 25, the obtained write data D <b> 2 is sent to the optical pickup 27 via the RF amplifier 26.

  The optical pickup 27 includes optical system devices such as a laser diode, a collimator lens, an objective lens and a light receiving element, and an electrical system device such as a laser diode driver, and a light beam modulated in accordance with supplied write data D2. The program area of the optical disk 12 shown in FIG.

  At this time, the optical pickup 27 generates a servo error signal S1 such as a tracking error signal and a focus error signal and a push-pull signal S2 based on the reflected light from the optical disc 12, and the servo error signal S1 is transmitted to the RF amplifier 26. The push-pull signal S2 is sent to an ATIP (Absolute Time In Pre-groove) decoder unit 29.

  The servo control unit 28 controls the thread motor 33 via the thread driver 32 based on the supplied servo error signal S1, thereby forming a beam spot of the light beam irradiated on the optical disk 12 on the recording surface. The optical disk 12 is moved in the radial direction along the data track (pregroove or land). The servo control unit 28 performs tracking control and focus control by causing the biaxial actuator driver 34 to control a biaxial actuator (not shown) in the optical pickup 27 based on the supplied servo error signal S1.

  On the other hand, the ATIP decoder 29 detects the absolute address of the beam spot at that time on the optical disc 12 by decoding the supplied push-pull signal S2, and sends it to a CPU (Central Processing Unit) 35.

  That is, the ATIP decoder unit 29 includes the push-pull signal S2 in the push-pull signal S2 by passing the band-pass filter circuit in the range of ± 1 [kHz] with the center frequency provided therein being 22.05 [kHz]. After extracting the wobble component, FM demodulation processing is performed on the wobble component to detect the absolute address on the optical disc 12 where the beam spot is located at that time, and this is sent to the CPU 35 as an address information signal S3.

  Further, the ATIP decoder unit 29, every time the absolute address on the optical disk 12 obtained by the decoding process changes (that is, every time the sector on which the beam spot on the optical disk 12 operates) changes, S4 is sent to the CPU 35.

  The CPU 35 sequentially recognizes the current recording position on the optical disc 12 based on the supplied address information signal S3 and sync interrupt signal S4, and based on the recognition result and the recording speed set by the host computer 11. The optical disk 12 is driven to rotate by controlling the spindle motor 31 through the servo controller 28 and the spindle driver 30 sequentially. Thereby, the CPU 35 correctly records the recording data D2 on the optical disk 12.

  On the other hand, in the playback mode, the CPU 35 controls the servo control unit 28 to rotate the optical disc 12 and to drive the beam spot along the data track of the optical disc 12 in the same manner as in the recording mode described above. It is moved, and tracking control and focus control are performed.

  Further, the CPU 35 drives a laser diode in the optical pickup 27 to emit a light beam toward the optical disk 12. As a result, this light beam is reflected on the recording surface of the optical disk 12, and read data D <b> 3 composed of an RF signal obtained based on the reflected light is sent from the optical pickup 27 to the decoder unit 36 via the RF amplifier 26. The

  The decoder unit 36 includes a PLL (Phase Locked Loop) circuit 37, a synchronization data detection unit 38, an EFM demodulation unit 39, a CIRC decoding unit 40, and a layered ECC demodulation unit 41, and read data supplied from the PLL circuit 37. The clock CLK is extracted from D3, and the clock CLK and read data D3 are sent to the synchronous data detection unit 38.

The synchronization data detector 38 sequentially detects the synchronization data D _sync from the read data D3 based on the supplied clock CLK, and sequentially sends the read data D3 to the EFM demodulator 39 in predetermined units based on the detection result. To do.

  The read data D3 is then EFM demodulated in the EFM demodulator 39, CIRC decoded in the CIRC decoder 40, and further subjected to error correction in the layered ECC demodulator 41, so that the format before recording is obtained. The data is converted to the data D4 and then sent to the host computer 11 via the interface circuit 20.

  In this way, the optical disk apparatus 10 records the data D1 supplied from the host computer 11 on the optical disk 12, or reproduces the data recorded on the optical disk apparatus 12 and sends it to the host computer 11. It is made to be able to.

(2) Format of Optical Disc 12 (2-1) Physical Format of Optical Disc 12 Next, the physical format of the optical disc 12 on which data D1 is recorded by the optical disc apparatus 10 will be described.

  The physical format of the optical disk 12 conforms to the Orange Book standard, which is a standard for writing to a CD.

  That is, in such an optical disc 12, as shown in FIG. 2, a power calibration area (maximum trial writing) in which the optimum light beam power of the optical disc 12 is measured in order from the center toward the outer periphery before recording the recording data D1. Number of implementations: 100 times), a program memory area (PMA) in which recording information and skip information are temporarily recorded when the optical disk 12 in the process of additional recording is taken out, and the number of songs in the optical disk 12, etc. A lead-in area in which various index information is recorded, a program area in which recording data D1 is recorded, and a lead that is an area for correcting a light beam trajectory to the program area An out-area (Lead-out Area) is provided.

  As described above, the optical disk 12 can perform power calibration, recording, and reproduction, respectively, even if an optical disk device having a conventional configuration conforming to the Orange Book standard is used.

  In addition to such a configuration, in the case of this optical disc 12, the outer power for measuring the optimum light beam power of the optical disc 12 instead of this area after the power calibration area is used up on the outer periphery side of the lead-out area. A calibration area (OPCA: Outer Power Calibration Area) is provided.

  In this manner, in the optical disk apparatus 10, the number of power calibrations can be increased.

(2-2) Logical format of the lead-in area of the optical disc 12 Next, the logical format of the lead-in area of the optical disc 12 will be described.

  In the lead-in area, as shown in FIG. 3, 24-bit frame synchronization information and 8-bit data composed of subcodes P, Q, R, S, T, U, V, and W are used as one symbol as EFM (Eight to Fourteen Modulation) Modulated 14-bit subcode information and 32-bit 14-bit audio symbols each of which 8-bit index information is EFM-modulated, and subcode information and 3-bit for each audio symbol. Frames having connection bits (not shown in FIG. 3) as one unit are sequentially combined and recorded.

  As shown in FIG. 4, one block is logically configured with 98 frames as one unit, and the above-described subcodes P, Q, R, S, T, U, V, and W are respectively included in this one block. The 98 bits included make meaningful information for the first time.

Subcode Q of these sub-codes, as shown in FIG. 5, toward the outer periphery from the center of the optical disk 12, and 2 bits of the block synchronization information (commonly referred to as S ₀ and S _1), at the time of recording 4-bit control information indicating whether or not pre-emphasis for raising the high frequency range, 4-bit address information normally set to 0001, and 72-bit Q channel in which index information related to the recording data D1 is recorded Data and 16-bit CRC (Cyclic Redundancy Code) information for detecting and correcting errors in the Q channel data during reproduction.

  When the address information is 0001, the Q channel data includes number information indicating the number of the song in the optical disc 12 from the center of the optical disc 12 toward the outer periphery, as shown in FIG. Index information indicating the division number, 3 byte in-music information indicating the beginning time from the beginning of the song, zero information in which “00000000” is set, and cumulative indicating the elapsed time from the beginning of the optical disc 12 Represents information.

  As described above, the Q channel data of the subcode Q usually represents the index information related to the music recorded on the optical disc 12, but exceptionally, the Q channel data of the subcode Q at a plurality of specific locations is recorded on the optical disc 12. It is defined in the Orange Book to represent various types of index information related to the physical format.

  As various types of index information relating to this physical format, there are special information (Special Information) 1, 2, and 3 and additional information (Additional Information) 1, 2, and 3.

  Special information 1 is the type of optical disk 12 (eg, CD-R or CD-RW), special information 2 is the start time of the lead-in area, special information 3 is the start time of the lead-out area, and additional information 1 is the optical disk 12 The additional information 2, such as the recording speed range, indicates the light beam power suitable for suppressing the generation of asymmetry for the low-speed recording and the high-speed recording, respectively.

  In addition to this configuration, in the case of the optical disc 12, the outer power calibration that is the start address of the outer power calibration area is included in the in-music information of the Q channel data corresponding to the additional information 3 that has not been used for conventional reservation. An area address (OPCA address) is recorded in advance.

  The recording length in the outer power calibration area is determined by the outer power calibration area address.

  In this manner, in the optical disc apparatus 10, the number of times power calibration is performed in the outer power calibration area is determined according to the recording length in the outer power calibration area.

(3) Power Calibration of Optical Disc Device 10 Next, power calibration in the optical disc device 10 will be described.

  In the case of this optical disk apparatus 10, when data D1 given from the host computer 11 is recorded on the optical disk 12, as in the conventional optical disk apparatus, a trial writing is performed in the power calibration area, and recording is performed based on the result of the trial writing. At this time, if the power calibration area is used up, trial writing will be performed in the outer power calibration area shown in FIG. 2 provided on the outermost periphery of the optical disk 12 from the next time. Has been made.

  In this case, as described above, the CPU 35 sequentially recognizes the current position on the optical disc 12 based on the address information signal S3 and the sync interrupt signal S4 supplied from the ATIP decoder unit 29, and based on the recognition result. By controlling the spindle motor 30, the thread motor 33 and the biaxial actuator, the optical pickup 27 is moved in the radial direction of the optical disk 12 so that the beam spot of the light beam on the optical disk 12 falls within the lead-in area shown in FIG. Let

  Then, the CPU 35 sequentially irradiates the optical disk 12 with a light beam through the RF amplifier 26 and the optical pickup 27, and outputs a signal S8 (additional information 3) based on the reflected light from the optical disk 12 from the optical pickup 27 and the RF amplifier 26. Supplied.

  At this time, the CPU 35 identifies the outer power calibration area address based on the supplied signal S8, and recognizes the number of times power calibration is performed in the outer power calibration area based on the identification result.

  However, the recording length in the lead-out area is secured for at least 1 minute and 30 seconds (corresponding to 1 mm in the radial direction), as specified in the CD-DA (DA: Digital Audio) standard red book. Shall be.

  Then, the CPU 35 moves the optical pickup 27 in the radial direction of the optical disc 12 so that the beam spot of the light beam on the optical disc 12 falls within the power calibration area.

  At this time, the CPU 35 determines whether or not all the 1500 sub-coding frames for trial writing forming the test area on the inner circumference side have been used up in the count area on the outer circumference side of the power calibration area.

  Here, when the CPU 35 determines that all of the 1500 sub-coding frames for trial writing forming the test area of the power calibration area are not used up, the CPU 35 selects three unused frames in the test area, and further selects them. Each frame is divided into five small areas, and trial data is sequentially trial-written while modulating the power of the light beam as shown in FIG. 8 through the RF amplifier 26 and the optical pickup 27 in order, and in the power calibration area. Enter the cumulative frequency (up to 100 times) of the trial in the count area.

  At this time, the optical pickup 27 calculates asymmetry based on the reflected light from the optical disk 12, and sends the calculation result to the CPU 35 as an asymmetry signal S7 via the RF amplifier 26.

  Then, the CPU 35 determines, based on the supplied asymmetry signal S7, which power is optimal among the light beams irradiated in the power calibration area, and the optimum at the time of recording the data D1 described above. Set the power.

  Here, when the optimum power is a value within a predetermined reference range, the CPU 35 determines that the power calibration is successful and stores the optimum power, whereas the optimum power is If the value is outside the predetermined reference range, it is determined that the power calibration has failed, and the power calibration is performed again.

  On the other hand, when the CPU 35 determines that all of the 1500 sub-coding frames for trial writing forming the test area of the power calibration area are used up, the beam spot of the light beam on the optical disc 12 is the outer power calibration area. The optical pickup 27 is moved in the radial direction of the optical disk 12 so as to enter the inside.

  At this time, the CPU 35, in the count area shown in FIG. 9 in the outer power calibration area composed of the test area and the count area, similarly to the power calibration area, has a test writing frame constituting the test area. It is determined whether or not everything has been used up.

  Here, when the CPU 35 determines that all the frames in the test area of the outer power calibration area are not used up, in the outer power calibration area, the same process as the power calibration in the power calibration area as described above is performed. do.

  On the other hand, when the CPU 35 determines that all the frames constituting the outer power calibration test area have been used up, the CPU 35 ends the power calibration.

  In this manner, in the optical disc apparatus 10, when the power calibration area is used up, power calibration is performed in the outer power calibration area.

(4) Processing of CPU 35 in recording mode Next, a series of processing procedures of the CPU 35 during power calibration will be described. In this optical disc apparatus 10, when the optical disc 12 is inserted into an optical disc drive (not shown), the CPU 35 performs power calibration according to the power calibration processing procedures RT1 and RT2 shown in FIGS. 10 and 11, respectively.

  That is, when the optical disk 12 is inserted into the optical disk drive, the CPU 35 starts this power calibration processing procedure at SP1.

  Next, the CPU 35 proceeds to step SP2 and determines the type of the optical disk.

  That is, the CPU 35 rotates the spindle motor 31 with a predetermined constant torque sequentially through the servo control unit 28 and the spindle driver 30, and measures the inertia moment of the rotating optical disk 12 through a measuring unit (not shown). Based on the above, the size of the optical disk 12 (radius 8 [cm] or 12 [cm]) is determined.

  Subsequently, the CPU 35 sequentially irradiates the optical disk 12 with a light beam via the RF amplifier 26 and the optical pickup 27, and the optical disk 12 is subjected to CD− based on the reflectance of the reflected light from the optical disk 12. It is discriminated whether it is RW or another optical disc (CD-R and CD-ROM (ROM: Read Only Memory)), and the discrimination result is sent to the CPU 35 via the RF amplifier as a first medium discrimination signal S8.

  Further, the CPU 35 causes the optical pickup 27 to send the signal S9 generated based on the reflected light from the optical disc 12 to the ATIP decoder unit 29, and then causes the ATIP decoder unit 29 to decode the supplied signal S9. Then, it is determined whether or not the absolute address of the beam spot at that time on the optical disc 12 is detected (that is, whether it is CD-R (detection) or CD-ROM (non-detection)), and the determination result is determined as the second medium determination. The signal is sent to the CPU 35 via the RF amplifier as the signal S10.

  The CPU 35 determines whether the optical disk 12 is a CD-RW or another optical disk (CD-R or CD-ROM) based on the supplied first medium determination signal S8, and also supplies the supplied second medium determination signal S10. Based on the above, it is determined whether the optical disk 12 is a CD-R or a CD-ROM.

  Subsequently, the CPU 35 controls the rotation of the spindle motor through the servo control unit 28 and the spindle driver 30 sequentially, and at the same time the laser in the optical pickup 27 through the servo control unit 28, the thread driver 30 and the biaxial actuator driver 34. The beam spot of the light beam emitted from the diode is moved to the lead-in area shown in FIG.

  Further, when the signal S7 (additional information 3) based on the reflected light from the lead-in area is sequentially supplied from the optical pickup 27 and the RF amplifier 26, the CPU 35 specifies the outer power calibration area address based on the signal S7. Then, the number of power calibrations performed in the outer power calibration area is recognized based on the identification result.

  Next, the CPU 35 proceeds to step SP3 and waits until an instruction is given from the host computer 11, and when an instruction is given from the host computer 11, the CPU 35 proceeds to step SP4 and determines whether this instruction is a recording instruction.

  If the CPU 35 obtains a negative result in step SP4, the CPU 35 executes the instruction, returns to step SP3, waits until an instruction is given again from the host computer 11, and responds positively in step SP4. If it is obtained, the process proceeds to step S6 to determine whether or not the power calibration has been completed.

  If the CPU 35 obtains a negative result in step SP6, it proceeds to step S7 to start power calibration, and in the subsequent step SP8, the light beam so that the position of the beam spot of the light beam falls within the power calibration area. The pickup 27 is moved.

  Next, the CPU 35 proceeds to step SP8 and determines whether or not the power calibration area has been used up.

  If the CPU 35 obtains a negative result in step SP8, it proceeds to SP9 and selects three unused frames in the test area of the power calibration area and divides each selected frame into five small areas. The trial writing data is sequentially written in a total of 15 small areas while sequentially modulating the power of the light beam through the RF amplifier 26 and the optical pickup 27, and the power calibration is accumulated in the count area of the power calibration area. Enter the frequency.

  Then, the CPU 35 determines, based on the asymmetry signal S7 supplied from the optical pickup 27 as described above, which power is optimal among the light beams irradiated in the power calibration area, and The optimum power at the time of recording the data D1 is detected.

  Here, the CPU 35 determines that the power calibration is successful when the optimum power is a value within a predetermined reference range, and proceeds to step SP14 to end the power calibration. If the power to be taken is a value outside the predetermined reference range, it is determined that the power calibration has failed, and the process returns to step SP8.

  On the other hand, if the CPU 35 obtains a positive result in step SP8, the CPU 35 proceeds to step SP10 and determines whether or not the additional information 3 is stored in the memory 42.

  Here, if the CPU 35 obtains a negative result in step SP10, the outer optical calibration cannot be provided because the optical disk 12 is recorded on the entire outer periphery, such as an optical disk for 80 minutes. Recognize and proceed to step SP14 to end the power calibration.

  On the other hand, if the CPU 35 obtains a positive result in step SP10, it recognizes that the optical disk 12 has a margin for providing an outer power calibration such as a 74-minute recording optical disk.

  Next, the CPU 35 proceeds to step SP11 to determine whether the recording mode preset by the host computer 11 is the above-described DAO mode or the rewritable mode in which the recording data D1 can be re-recorded on the optical disc 12 any number of times.

  When the CPU 35 obtains the DAO mode as the recording mode in step SP11, the CPU 35 does not stipulate that the outer power calibration area is formed on the optical disc 12 recorded in the DAO mode. The area corresponding to the outer power calibration area may be used for other purposes because it is necessary to comply with the Yellow Book (CD-ROM (ROM: Read Only Memory) standard) or when recording in the DAO mode. Therefore, without forming the outer power calibration area on the outer periphery side of the lead-out area, the process proceeds to step SP14 and power calibration is terminated.

  On the other hand, when the CPU 35 obtains the rewritable mode as the recording mode in step SP11, it is defined that the optical disc 12 recorded in the rewritable mode is not prohibited from forming the outer power calibration area. Recognize that it should be compliant with the above-mentioned Orange Book.

  Next, the CPU 35 proceeds to step SP12 to determine whether or not the outer power calibration area has been completely used up.

  If the CPU 35 obtains a negative result in step SP12, it proceeds to step SP13 and performs power calibration in the outer power calibration area as in step SP9 described above, and when power calibration is successful. Advances to step SP14 and ends the power calibration, but returns to the above-described step SP12 when the power calibration fails.

  On the other hand, if the CPU 35 obtains a positive result in step SP12, the CPU 35 proceeds to step SP14 and ends the power calibration.

  After completing the power calibration in step SP14, the CPU 35 proceeds to step SP15 to record the data D1 given from the host computer 11 on the optical disk 12, and in the subsequent step SP16, all the data given from the host computer 11 are processed. It is determined whether or not the recording process of the data D1 has been completed.

  If the CPU 35 obtains an affirmative result in step SP16, it returns to step SP3 and waits until an instruction is given again from the host computer 11, whereas if it obtains a negative result in step SP16, As described above, the recording operation of the data D1 given from the host computer 11 onto the optical disk 12 is continued.

(5) Operation and effect of the present embodiment In the above configuration, in the optical disc apparatus 10, when the power calibration area is used up, power calibration is performed in the outer power calibration area. Therefore, even if the power calibration area is used up, the optical disc apparatus 10 can detect the optimum power of the light beam and can continue recording with the detected light beam of the optimum power.

  According to the above configuration, when the power calibration area is used up, the optimum power of the light beam is detected by performing power calibration in the outer power calibration area, and the detected light beam with the optimum power is detected. Thus, a recording apparatus that can improve the recording reliability of the optical disk 12 can be realized.

(6) Other Embodiments In the above-described embodiment, the case where the present invention is applied to an optical disc apparatus corresponding to a CD-R has been described. The present invention can be applied to writable optical discs such as CD-RW and DVD-RAM (DVD: Digital Versatile Disc) and various other rewritable recording devices.

  Further, according to the above-described embodiment, the case of switching to the outer power calibration area when the power calibration area is used up has been described. However, the present invention is not limited to this, and for example, power calibration is performed in the power calibration area. When there is a scratch that cannot be performed, the outer power calibration area may be switched to, or when the outer power calibration area is used up, the power calibration area may be switched.

  Further, according to the above-described embodiment, it is not specified whether the data D1 is recorded in the constant linear velocity (CLV) mode or the constant angular velocity (CAV) mode. When data is recorded in the CAV mode, the linear velocity at the outer periphery of the optical disc 12 is about 2.5 times the linear velocity at the inner periphery, so that it is necessary to adjust the power of the light beam according to the radial direction. In such a case, power calibration is performed in each of the power calibration area and the outer power calibration area, and the optimum power of the light beam corresponding to the radial direction is set based on the power detection results of these areas. May be.

  Furthermore, according to the above-described embodiment, the trial writing means for trial writing the trial writing data in the trial writing area of the optical disc 12 is configured by the optical pickup 27, the RF amplifier 26, and the CPU 35 for controlling them. The present invention is not limited to this, and may be provided as a single unit.

  Furthermore, according to the above-described embodiment, the detection means for reproducing the trial writing data trial-written by the trial writing means and detecting the optimum power of the light beam based on the reproduced trial writing data is the trial writing means. Similarly, the optical pickup 27, the RF amplifier 26, and the CPU 35 that controls them are configured.

  DESCRIPTION OF SYMBOLS 10 ... Optical disk apparatus, 11 ... Host computer, 12 ... Optical disk, 21 ... Encoding part, 22 ... Buffer memory, 27 ... Optical pick-up, 35 ... CPU, 36 ... Decoder part.

Claims (6)

In a recording apparatus for recording the recording data by irradiating the recording area of the recording medium with a light beam modulated according to the recording data,
A trial writing means for trial writing the trial data in the trial writing area of the recording medium;
Replaying the trial data written by the trial writing means, and detecting means for detecting the optimum power of the light beam based on the reproduced trial data.
The above-mentioned prototyping means is
A recording device characterized in that the trial writing area of the trial writing data is switched from the trial writing area to another trial writing area as necessary. The trial area is
Provided on the innermost circumference of the recording medium,
The other trial areas above are
The recording apparatus according to claim 1, wherein the recording apparatus is provided on an outermost periphery of the recording medium. In the recording method of recording the recording data by irradiating the recording area of the recording medium with a light beam modulated according to the recording data,
A first step of trial writing the trial writing data in the trial writing area of the recording medium;
Replaying the proofreading proofreading data, and detecting the optimum power of the light beam based on the replayed proofreading data,
In the first step,
A recording method characterized by switching an area for trial writing of the trial writing data from the trial writing area to another trial writing area as necessary. The trial area is
Provided on the innermost circumference of the recording medium,
The other trial areas above are
The recording method according to claim 3, wherein the recording method is provided on an outermost periphery of the recording medium. In a recording medium having a recording area in which the recording data is recorded by irradiation with a light beam modulated according to the recording data,
A recording medium comprising a plurality of trial writing areas in which trial writing data for detecting the optimum power of the light beam is written. The tentative area above is
The recording medium according to claim 5, wherein the recording medium is provided on an innermost circumference and an outermost circumference of the recording medium.

Images