JP2005182856A - Recording method of optical disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To overcome the problem having such a weak point that a PCA area can not be used for a recording test due to an occurrence of a recording error at the outer periphery since the recording speed difference is generated between at the inner peripheral position and the outer peripheral position in the CAV recording operation, although the use of the PCA area is conceivable for the recording test as a method for preliminarily confirming the occurrence of recording/reading errors in the conventional optical disk drive and the recording method thereof. <P>SOLUTION: This method has a feature that a block recording area is secured in a lead-out area of the optical disk 1 prior to the user data recording to the optical disk 1 to carry out continuous recording operations in the specified number of blocks. Thus, an appropriate recording speed can be obtained even though a small torque spindle motor 2 is used, and the occurrence of recording error is evaded by the data recording operation at the speed slower than this recording speed, and also a recording quality is improvable. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a recording method for an optical disc apparatus for recording / reproducing data on / from an optical disc such as a CD-R (data can be written only once), a CD-RW (data can be written, erased, and rewritten).

  In an optical disc apparatus that records and reproduces CD-R, CD-RW, etc., spindle servo control is performed to rotate the optical disc at a predetermined speed. There is a CLV (Constant Linear Velocity) recording method in which the spindle rotation is controlled so that the linear velocity is constant at the position, in order to improve the average recording speed in a small motor with a small torque that cannot increase the rotation speed of the spindle motor. In addition, a method called zone CLV recording is used in which the area of the optical disk is divided into a plurality of zones and the linear velocity is increased stepwise for each zone.

  Recently, a CAV (Constant Angular Velocity) recording method has been realized in which the rotational angular velocity is controlled to be constant and the linear velocity increases as the radius increases. By realizing CAV recording, it is possible to increase the recording speed even in a small motor with a small torque that cannot increase the rotation speed of the spindle motor, and it is possible to suppress the power consumption due to the rotational fluctuation of the spindle motor during recording. In CAV recording, since the linear velocity is proportional to the radius, the outer circumference has a longer recordable length in the circumferential direction within the same time than the inner circumference, so that a higher recording speed is obtained at the outer circumference than at the inner circumference. For example, when the radius length on the outer periphery is twice the radius length on the inner periphery, the recording speed on the outer periphery is twice the recording speed on the inner periphery.

  By the way, there are the following control items when recording on the optical disc by CAV recording and CLV recording. First, the jitter value. EFM (Eight to Four Modulation) modulation data obtained by binarizing an RF reproduction signal obtained from an optical disk originally has a period of 3T to 11T that is an integral multiple of the period T of the reproduction clock. However, the period of EFM modulation data obtained from the RF reproduction signal and the integral multiple of the reproduction clock T due to the degree of correspondence of the dye applied to the recording layer of the optical disk to high-speed recording or the mismatch of the recording laser power with the optical disk. There is a time lag with respect to the period. This time lag is called jitter of the RF reproduction signal of the optical disk. According to the standard of the optical disk (referred to as “Red Book”), the allowable jitter value must be less than 35 ns at the standard (1 ×) speed. It is stipulated. In addition, when obtaining an allowable jitter value when the linear velocity at the time of jitter measurement is not standard speed, obtain how many times (multiple N) the linear velocity at the time of jitter measurement is the linear velocity. , 35 ns must be divided by a multiple N. This is because the jitter measurement value is apparent but inversely proportional to the linear velocity. In this way, the jitter value must be within an allowable range.

  Also, the number of block errors needs to be kept within an allowable value. The number of block errors is the number of detected errors per unit block when a data block is read from EFM modulated data obtained by binarizing an RF reproduction signal from an optical disk. Here, the number of C1 errors that are bit errors occurring in one block is considered as the number of block errors. According to the optical disc standard (the above-mentioned “Red Book”), it is specified that this value is 220 or less. If the C1 error is 220 or less, the error can be corrected by the correction function. Can continue to control.

  In addition, there is an allowable value for the ATIP error rate. That is, pregrooves (guide grooves) are formed in the manufacturing process on optical disks such as CD-R and CD-RW. This pregroove wobbles while meandering at 22.05 kHz, and time information called ATIP (Absolute Time in Pre-groove) is FM-modulated and recorded in the wobble. The ATIP error rate is an error detection rate per unit time when reading the ATIP. This ATIP error is detected for each ATIP frame, and is performed 75 ATIP frames per second at the standard speed. For example, if there is an error of 15 frames per second at the standard speed, the ATIP error rate is calculated as 15/75 (20%). The ATIP error rate is defined as less than 10% according to the optical disc standard (referred to as “Orange Book”).

  Further, in the optical disc apparatus, trial writing is performed using a trial writing area (PCA: Power Calibration Area) which is prepared in advance on the optical disc in order to determine the optimum recording laser power value at the time of recording. Recording of other areas of the optical disc is performed with the optimum recording laser power value obtained from the result. Note that the method of optimum recording laser power determination control (Optimum Power Control) using this trial writing area is defined by the optical disc standard (the above-mentioned “Orange Book”).

  Therefore, the details of each area provided on the optical disk including the PCA area will be further described with reference to FIG. FIG. 2 shows each area of the optical disk. As shown in FIG. 2, the optical disk 1 has an empty area 32, a PCA area 33, a PMA area 34, a lead-in area 35, a program area 36, and a lead-out area 37, which are areas not used for recording. A form in which a free area 38 that is not used for recording exists, or a free area 32, PCA area 33, and PMA area 34 that are not used for recording, followed by a lead-in area 39, a program area 40, and a lead-out area. There are an area 41, a lead-in area 39, a program area 40, and a lead-out area 41 which are repeated 42, a lead-in area 43, a program area 44, a lead-out area 45, and a free area 38 which is not used for recording. There is also a form called multi-session. The PCA area is the trial writing area. In addition to information relating to each track, disc identification information (Disc ID) is recorded in the PMA area (Program Memory Area). Information about each track is recorded in the lead-in area. In the program area, file data, audio data, and the like are recorded as a storage area for user data. In the lead-out area, track information indicating the lead-out is written.

  Data called a subcode is written on the recorded optical disc, and the data of the subcode is used as one information unit using 98 frames. The subcode is composed of 8 bits per frame, and the 8-bit data is represented by P, Q, R, S, T, U, V, and W, respectively. P and Q are used for obtaining address information of the optical disc, and R, S, T, U, V, and W are used for graphics. In particular, data corresponding to subcode Q is referred to as subcode Q.

As a prior example, there is (Patent Document 1) and the like.
JP 2002-358642 A

As described above, when recording at the outer peripheral position during zone CLV recording on the optical disk, or when recording at the outer peripheral position during CAV recording, the recording speed increases, so the unit time and unit area for the optical disk The recording laser power applied to the laser beam decreases. Therefore, it is necessary to make the laser power at the time of recording higher than the laser power at the time of recording at the outer periphery. However, if the laser power at the time of recording is increased, the frequency characteristics of ATIP deteriorate depending on the optical disk, and the ATIP error rate In some cases, the ATIP cannot be read and a recording error occurs. Also, when the laser power at the time of recording is increased, the recording characteristics of the dye applied to the recording layer of the optical disk may deteriorate depending on the optical disk, so that the quality at the time of recording deteriorates and the number of block errors in the reproduction RF signal ( Hereinafter, the number of block errors) and jitter (hereinafter referred to as jitter) of the reproduction RF signal increase. The degree of the characteristic deterioration differs depending on the degree of correspondence to the characteristic by the optical disc.

  As described above, when zone CLV recording is performed or when CAV recording is performed, there is a possibility that an ATIP at the time of recording cannot be read and a recording error occurs as it goes to the outer periphery. However, it is necessary to confirm at which position a recording error occurs or whether a recording error does not occur, and in order to ensure certainty in this confirmation method, it is sufficient to actually record and confirm, but as a result, the recording error If this happens, the time spent on this recording is wasted. In addition, if the recording quality is poor even if a recording error is not reached, the number of block errors exceeds a predetermined value, or the jitter exceeds a predetermined value, so that reproduction cannot be performed and a reading error occurs.

  When a recording error occurs, the disc becomes unusable in the case of a CD-R in which data can be written only once. For this reason, the user needs to write data using another CD-R. In addition, in the case of a rewritable CD-RW, it is necessary to perform recording again using the same disc. However, a recording error may occur again in CAV recording and CLV recording at the same recording speed. Decrease the rotation speed at the time of CAV recording by operation, then perform CAV recording again, or change to CLV recording and change the rotation speed, then record again, or at the time of CLV recording, lower the rotation speed and then restart CLV There is a problem of having to record.

  Therefore, prior to data recording, it is only necessary to confirm in advance whether or not a recording error has occurred at the time of data recording on the outer periphery, or whether a reading error has occurred because the recording quality falls below a certain level. It can be used for (trial writing), but when recording in the PCA area 33 at the recording speed equivalent to the linear speed at the outer peripheral position at the time of zone CLV recording, the spindle rotation speed is set in proportion to the radius ratio. (For example, when the radius ratio between the PCA region 33 and the outer peripheral position is doubled, the spindle rotational speed in the PCA region 33 is twice the spindle rotational speed at the outer peripheral position).

  Similarly, during CAV recording, a recording speed difference proportional to the radius ratio between the inner peripheral position and the outer peripheral position is generated. Therefore, in order to make the recording speed in the PCA area 33 the same as the recording speed when recording on the outer periphery. The spindle rotation speed needs to be increased in proportion to the radius ratio between the position of the PCA area 33 and the position recorded on the outer periphery.

  However, if the motor torque is limited, it cannot be increased to a desired spindle rotation speed. In order to reduce the size of the optical disk device, the spindle motor must be reduced in size to reduce the power consumption of the spindle motor and reduce the cost. Can't turn. Even if the problem of reducing the torque is solved, if the optical disk is rotated at a high speed, the influence of the eccentricity of the optical disk increases, and the vibration of the optical disk itself is generated. A recording error occurs because the ATIP cannot be read during recording because it cannot be stabilized. For these reasons, there is a problem that the PCA area 33 cannot be used for recording errors on the outer periphery and recording quality recording tests.

  Although it is possible to use the outermost unrecorded area for a recording quality recording test, it is a track unit called TAO (track-at-once) on an optical disc that can be recorded only once such as a CD-R. When write-once recording is performed using a writing method or the like, since the address position used for the recording test and the data to be additionally recorded cannot be recorded, the recording capacity that can be recorded on the optical disk is limited. Therefore, there is a problem that the recording capacity of the optical disk cannot be used to the maximum.

  Further, in the case of a method of writing in units of tracks called TAO (track at once), when the unrecorded area at the outermost periphery is used for recording error occurrence confirmation and recording quality confirmation, during CAV recording, during data recording It is necessary to control the spindle speed so that the linear velocity and the linear velocity at the time of recording in the outermost unrecorded area are the same.

  Therefore, even if a spindle motor with a small torque is used in the present invention, the ATIP error rate at the time of data recording is less than a predetermined value, the block error after recording is less than a predetermined value, and the jitter is less than a predetermined value even before data recording. An object of the present invention is to avoid the occurrence of a recording error and improve the recording quality by performing data recording at a recording speed lower than that recording speed.

  Further, in order to make the recording capacity of the optical disc maximally usable, it is premised that the unrecorded area on the outermost periphery is not used for recording error confirmation and recording quality confirmation.

  In order to solve the above-described problems, in the optical disc apparatus of the present invention, the control means secures a block recording area in the lead-out area of the optical disc prior to actual user data recording on the optical disc, and performs continuous recording of a fixed number of blocks. It is characterized by performing.

  As a result, even when a spindle motor with a small torque is used, the recording in which the ATIP error rate at the time of data recording is less than a predetermined value, the block error after recording is less than the predetermined value, and the jitter is less than the predetermined value even before data recording is performed. The speed can be obtained, and by performing data recording at the recording speed or less, the occurrence of a recording error can be avoided and the recording quality can be improved.

  Furthermore, the recording area of the medium can be used to the maximum by using the lead-out area for recording error confirmation and recording quality confirmation instead of the outermost unrecorded area.

  According to the present invention, there is a problem that a recording error occurs because ATIP cannot be read during recording when the optical disk is rotated at a high speed by performing continuous recording of a certain number of blocks in the lead-out area that does not affect data recording. In addition to the effects that can be avoided, the spindle servo control method and the spindle rotation speed can be obtained before actual data recording, and recording that makes use of the features of CAV recording and CLV recording is possible. is there.

The recording method of the optical disk apparatus according to claim 1 of the present invention is a recording method of the optical disk apparatus that performs at least one of data recording and reproduction on the optical disk, and recording of the user data area on the optical disk is terminated. Next, when recording in the lead-out area, a predetermined number of blocks are recorded in the lead-out area prior to the user data recording, and when the predetermined number of blocks is recorded a plurality of times, A recording method of an optical disc apparatus characterized in that no gap or overlap is provided between the number of blocks, and is caused by the influence of the eccentricity of the optical disc when the optical disc is rotated at a high speed using the PCA recording position area. It is possible to avoid problems such as servo instability and recording errors due to ATIP being unreadable during recording. Further, by performing continuous recording of a certain number of blocks in the data recording area, it is possible to confirm in advance whether a data recording error or the like occurs on the outer periphery during CAV recording or CLV recording.

  The reason why the lead-out area is used for the above-described recording error detection is that the lead-out area is in a different area from the user area, and only track information indicating the lead-out is recorded in the information to be recorded. For this reason, no matter how much the lead-out area is used for recording error detection, there is no change in user data.

  Also, since the lead-out area is used for recording error occurrence confirmation and recording quality confirmation, the optical disk recording that occurs when the outermost unrecorded area is used for recording error occurrence confirmation and recording quality confirmation. The problem that the capacity cannot be used to the maximum is solved.

  Further, the recording start position of the first constant block number to be recorded in the lead-out area is set to a position obtained by subtracting the constant block from the final position of the lead-out area. It becomes equal to the final position of the lead-out area. This is because, in the case of CAV recording, the recording speed increases as it goes to the outer periphery, so even if a recording error or the like does not occur in the program area recording, a recording error or the like may occur in the lead-out recording. This is because it is possible to confirm whether or not a recording error or the like has occurred in the entire lead-out area by performing constant block recording near the area final position.

  Further, the recording is interrupted at an arbitrary position during recording on the optical disc, and the recording is performed following the data at the interrupted recording position when the data recording is resumed after the end of a certain process, and the data to be recorded and the interrupted recording position are recorded. When there is an error during continuous recording of a fixed block recording of a lead-out area recorded prior to user data recording, this means that there is a means of recording without data overlap and no gap between the data in Alternatively, it is used to interrupt recording when certain block recording ends. Further, it is used when continuous recording of a certain number of blocks can be performed a plurality of times and user data is recorded from the beginning of the user data area after the end of recording.

  In addition, when creating a lead-out area, an empty part in a certain block that occurs when a recording error occurs, the recording is interrupted at the address immediately before the target block recording area, and the empty part It is possible to perform recording on an empty portion by restarting recording from the beginning and suspending the recording when the recording of the empty portion is completed. Therefore, the continuity of the recording data can be maintained by using this means.

  In the recording method of the optical disk device according to claim 2 of the present invention, when the predetermined number of blocks are recorded a plurality of times in the lead-out area, the predetermined number of blocks is increased from the outer peripheral side to the inner peripheral side of the optical disk. 2. The recording method for an optical disc apparatus according to claim 1, wherein the recording methods are arranged sequentially. The reason why a certain number of blocks are recorded from the outer circumference to the inner circumference is that the recording speed increases in the CAV recording as it goes to the outer circumference, and a data recording error is likely to occur. When the data recording error no longer occurs, the data recording error does not occur on the inner circumference side.

According to a third aspect of the present invention, there is provided a recording method for an optical disc apparatus, wherein when a predetermined number of blocks are recorded in the lead-out area, if a recording failure state occurs during the first recording, one or more times are recorded. A recording operation of the optical disc apparatus according to claim 1, wherein a recovery operation is performed, and the number of blocks is recorded by changing a recording position in the recovery operation.
Before performing actual user data, the optimum spindle servo control method and spindle rotation speed for recording on the optical disc can be obtained.

  In the recording method of the optical disk device according to the fourth aspect of the present invention, the recovery operation when the recording failure state occurs depends on at least one of changing the spindle motor rotation speed or the spindle servo control system. When the fixed recording speed is lowered and the laser power for recording is changed by a predetermined amount and the recording failure state is not solved by the first recovery operation, the spindle motor rotates until the recording failure state is solved. 4. The recording method of the optical disk apparatus according to claim 3, wherein the recording speed is repeatedly reduced by at least one of changing the number and / or changing the spindle servo control system, before performing actual user data. , Spindle servo control system optimal for recording on optical disk, and spindle rotation It can be obtained.

  According to a fifth aspect of the present invention, there is provided a recording method for an optical disk device, wherein the spindle servo control method, the spindle rotation speed, and the recording laser power are changed with reference to a table stored in a memory in the recovery operation. According to the recording method of the optical disk apparatus according to claim 4, the control is easy and the process can be performed quickly.

  According to a sixth aspect of the present invention, there is provided a recording method for an optical disc apparatus, in which a recording failure state occurs when a predetermined number of blocks are recorded a plurality of times in a lead-out area, and recording is interrupted, and a recording error occurrence position 2 is stored in the block recording management table, and when a recording failure state does not occur, the final recording position is stored in the block recording management table. When data in the lead-out area is recorded after the data recording is completed, a recorded part (recorded part) and an unrecorded part (unrecorded part) can be discriminated. For optical disc media that can only be recorded, data can be recorded in an unrecorded portion without writing twice in the recorded portion.

  According to a seventh aspect of the present invention, there is provided a recording method for an optical disc apparatus wherein a recording error occurs, a recording error occurs or an error rate during recording is a predetermined value or more, or the number of block errors in a reproduction RF signal exceeds a predetermined value or reproduction. 4. The recording method of an optical disc apparatus according to claim 3, wherein at least one of the jitter values of the RF signal is greater than a predetermined value is recorded on the optical disc before performing actual user data. An optimum spindle servo control method and spindle rotation speed can be obtained.

  According to the recording method of the optical disk apparatus of the present invention, the error rate is less than a predetermined value, the number of block errors of the reproduction RF signal is less than the predetermined value, and the jitter value is recorded when the predetermined number of blocks are recorded in the lead-out area. The user data area and the lead-out area are recorded by a spindle servo control method and a spindle rotation speed at which the value becomes less than a predetermined value, and the recording method of the optical disk apparatus according to claim 1, wherein either CAV recording or CLV recording is performed. However, no recording error occurs during actual data recording.

  According to a ninth aspect of the present invention, there is provided a recording method for an optical disc apparatus according to the present invention, wherein when recording data in a lead-out area after user data recording is completed, an unrecorded data is recorded by referring to a fixed block recording management table stored in memory. 2. The optical disk on which data is recorded in a conventional format by the recording method of the optical disk apparatus according to claim 1, wherein the recording data in all areas of the lead-out area is continuous by recording the data at a location. The optical disc created according to the present invention is compatible with the user data area and the lead-out area, and the optical disc created according to the present invention can be accessed by the user in the same manner as the optical disc recorded with data in the conventional format. Data can be read out.

  In the lead-out area, a recording error may occur during recording of a certain block, so it is considered that the subcode Q recorded on the optical disk cannot be read at the time of accessing the lead-out. Can be fully handled by recovery processing such as changing the access position.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a block diagram of an optical disc apparatus according to an embodiment of the present invention. Here, the CPU 16 performs logic judgment and calculation according to the flowcharts shown in FIGS. Reference numeral 17 denotes a read only memory (ROM) having a program storage area in which a control program according to the flowcharts shown in FIGS. 4 and 5 and a control program for the optical disk apparatus are stored. A main memory 18 is used as a storage area necessary for recording control and data reproduction control in addition to a storage area necessary for the control of the flowcharts shown in FIGS. DESCRIPTION OF SYMBOLS 1 is an optical disk, 2 is a spindle motor for rotating the optical disk 1, 3 is a spindle motor driver for driving the spindle motor 2, 4 is a pickup unit for making a laser diode emit light, 5 is for driving a pickup unit 4 6 is an actuator driver for moving the pickup unit 4 to an arbitrary position, 7 is a feed motor driver for driving the feed motor 6, 8 is an LD driver for supplying a drive current to the laser diode of the pickup unit 4, 9 Is a read amplifier for amplifying the reproduction RF signal obtained by the pickup unit 4, and 10 is a servo control based on the reproduction RF signal from the read amplifier and the control of the feed motor 6, spindle motor driver 3 and actuator driver 5. CD servo processor 11 is a CD encoder that performs laser pulse control for recording data, 12 is an ATIP detector that extracts ATIP from an output signal from the read amplifier 9, and 15 is data obtained from an RF signal from the read amplifier 9. Is a CD-ROM decoder for decoding data via the CD servo processor 10, 14 is a buffer memory for storing data decoded by the CD-ROM decoder 15 and commands from the host, and 13 is recorded by the CPU 16 Alternatively, a D / A converter used for setting the reproduction laser power, 20 is a jitter measuring means for obtaining a jitter value from the reproduction RF signal from the read amplifier 9, and 21 is a buffer memory for commands and data from the host ATAPI interface for output to 14 A face.

  The user changes the rotational speed of CAV recording by operating the host. Alternatively, when the operation is changed to CLV recording and the rotation speed is changed, the rotation setting request from the host is held in the buffer memory 14 through the ATAPI interface 21, and the CPU 16 acquires the rotation setting request from the buffer memory 14 through the bus 19. To do. Thereafter, when the CPU 16 requests the CD servo processor 10 via the bus 19 for CAV control with a constant angular velocity or CLV control with a constant linear velocity, and a request for changing the spindle speed, the CD servo processor 10 10 performs rotation control and PWM output level change for the spindle motor driver 3. The spindle motor driver 3 changes the rotational speed of the spindle motor 2 in accordance with the input PWM output level, and rotates the optical disc 1 at a rotational speed corresponding to CAV control or CLV control.

FIG. 3 is a diagram showing each area of the optical disc in the present invention. FIG. 3 shows a lead-out area located next to the program area, an area for measuring the ATIP error rate used in the present invention, the number of block errors, and jitter. 3 in FIG. 3 is a program area, and 47 in FIG. 3 is a lead-out area. In FIG. 3, reference numeral 48 denotes the recording of a predetermined number of blocks prior to recording in the program area, whether or not a recording error has occurred, the ATIP error rate value at the time of recording, the number of block errors in the reproduction RF signal, or the jitter value of the reproduction RF signal. The range of the area | region used in order to acquire is shown, and it is comprised from 50 to 53 of FIG. Reference numerals 50 to 53 in FIG. 3 are areas where a fixed number of blocks is N. 3 of FIG. 3 is used first among 50 to 53 of FIG. 3, and its final block is arranged to coincide with the final block of the lead-out. As a result of recording using 50 of FIG. 3, 51 in FIG. 3 needs to lower the recording rotational speed, and is used for recording again at the lowered recording speed. The same applies to 52 and 53 in FIG. Further, 49 in FIG. 3 extends over the program area and the lead-out area, but 48 in FIG. 3 indicates that recording is performed without any overlap and without any gap.

  FIG. 4 is a flow chart for explaining the spindle rotation speed changing sequence in the present invention. The calculation according to this flowchart is executed by the control program stored in the ROM 17 and the CPU 16.

  Hereinafter, the description of FIG. 4 will be given. Before recording the program area, first, the head address of the block recording area 1 of FIG. 3 provided in the lead-out area is obtained.

  Since 50 to 53 in FIG. 3 are areas where a fixed number of blocks is N, each block recording area is represented by a block recording area M (variable M takes a value from 1 to N).

For this reason, the head address of the block recording area M is expressed by the relational expression lead-out final address + 1− (the number of fixed blocks × M).

  Therefore, in order to obtain the head address of the block recording area 1, 1 is substituted into M in the above relational expression (S1) (S2).

  Recording of a certain number of blocks is started from the head address obtained in S1 (S3). It is determined whether or not the recording of a certain number of blocks has been completed (S4). If the recording of a certain number of blocks has not been completed, the recording error is determined for each block (S15), and a recording error has occurred. In this case, the ATIP time information (address information) is changed from the recording end address for the block recording area M in FIG. 6 to the address where the recording error occurred, and the variable N is incremented by +1 (S16).

  The block recording address table in FIG. 6 will be described in detail later.

  If no recording error has occurred, an ATIP error rate is acquired for each block (S14). The wobble signal from the read amplifier 9 is taken out as an ATIP signal by the ATIP detector 12 and inputted to the CD encoder 11, and the CPU 16 acquires the ATIP error rate via the bus.

  When the recording of a certain number of blocks is completed, the recording end address for the block recording area M in FIG. 6 is changed to the recording final address, and the variable M is incremented by +1 (S5). Further, the average value of the ATIP error rate is calculated and stored in the variable A as the ATIP error rate generated in one block (S6).

The value of the variable A is compared with 10 (%) (S7), and if it is 10 (%) or more, it is determined that the ATIP error rate does not satisfy the standard value. Further, when the variable M exceeds the maximum number N of the predetermined number of blocks (S17), this process is terminated. If the maximum number N is not exceeded, the rotation change table in the main memory shown in FIG. 5 is referred to, and the next set recording rotation (change recording rotation) from the current spindle servo control method and the current recording rotation. Ask for. The rotation change table in FIG. 5 will be described in detail later (S18). Then, a command is issued to the CD servo processor 10 so as to achieve the change recording rotation, and the setting of the spindle servo control system and the spindle rotation speed are changed (S19). Next, the head address of the block recording area M for recording a predetermined number of blocks is obtained (S2), and the same operation is repeated. The value of the variable A is compared with 10 (%), and if it is less than 10 (%), it is determined that the ATIP error rate satisfies the standard value, and is obtained in S3 as a preparation for measuring the block error. Return to the predetermined block recording start address (S8).

  When the RF signal is reproduced from the block recording start address (S9), the reproduced RF signal from the read amplifier 9 is input to the CD servo processor 10 and the jitter measuring means 20, and the CD servo processor 10 measures the number of block errors. The CPU 16 acquires the block error count for each block via the bus 19. After the measurement of the block error rate for a certain number of blocks is completed, an average value of the block error numbers is calculated and stored in the variable B as the number of block errors occurring in one block (S10).

  The jitter measuring means 20 measures the jitter value, and the CPU 16 acquires the jitter value for each block via the bus 19. The spindle rotation speed during jitter measurement may be arbitrary, but when the linear velocity is standard speed, the jitter tolerance is set to 35 ns, and when the linear velocity exceeds the standard velocity, what the linear velocity is? A value obtained by dividing whether the number is double (multiple N) 35 ns by multiple N is set as a jitter tolerance. After the measurement of the jitter value of a certain number of blocks is completed, the average value of jitter is calculated and stored in the variable C (S11). Note that the number of block errors and the jitter value are measured simultaneously for each block.

  When the value of the variable B exceeds 220 (S12), it is determined that the jitter value does not satisfy the standard value. If the variable M exceeds the maximum number N of fixed blocks (S17), this process is terminated. If N is not exceeded, the rotation change table in the main memory shown in FIG. 5 is referred to, and the next set recording rotation (change recording rotation) is obtained from the current spindle servo control method and the current recording rotation. (S18). Then, a command is issued to the CD servo processor 10 so as to achieve the change recording rotation, and the setting of the spindle servo control system and the spindle rotation speed are changed (S19). After the spindle rotation speed is changed, the head address of the block recording area M for recording the next fixed number of blocks is obtained (S2), and the same operation is repeated. If the value of the variable B is 220 or less, a determination is made based on the value of the variable C (S13). When the value of the variable C is equal to or greater than the jitter tolerance (S13), the same processing as that performed when it is determined that the jitter value does not satisfy the standard value is performed, and when the value of the variable C is less than the jitter tolerance (S13). ) Terminates this process.

  In the block recording area, a capacity that can be used until there is a recording rotation in which the ATIP error rate is less than 10%, the number of block errors is 220 or less, and the jitter is less than the jitter tolerance (blocks from the block recording area 1 to the block recording area 1). However, if there is a problem on the optical disk side or a problem with the optical disk device, a recording error occurs in the block recording area 8, and the block recording area is used up. Terminates the process of FIG. 4 with an error.

  FIG. 5 is a diagram showing the relationship between the spindle servo control method and the current recording rotation in the present invention and the change recording rotation to be set next.

The case where there is no change in the spindle servo control system will be described below. The recording speed at the recording rotation for change is set to be lower than the recording speed at the current recording rotation at any user data recording position and lead-out recording position. Specifically, when the current spindle servo control method is CAV and the current recording rotation is CAV recording 1, the recording rotation to be set next is CAV recording 2 with the spindle servo control method CAV, and any user data The recording speed of CAV recording 2 is lower than the recording speed of CAV recording 1 at the recording position and lead-out recording position. The recording speed at the start of data recording for CAV recording 1 is recording speed 1, the recording speed at the start of recording data for CAV recording 2 is recording speed 2, and the optimum laser power for recording is laser power A2.

  Also, when the current spindle servo control method is CLV and the current recording rotation is CLV recording 1, the current recording rotation to be set next is CLV recording 2, and the recording speed of CLV recording 2 is CLV at an arbitrary data recording position. The recording speed of recording 1 is lower.

  Hereinafter, a case where the spindle servo control system is changed will be described. Even when the current spindle servo control method is CAV and the current recording rotation is CAV recording (CAV recording P in FIG. 5), the recording rotation for change to be set next may be CLV recording (CLV recording Q in FIG. 5). This is because the spindle servo control system changes the current recording rotation in the CAV and lowers the recording speed, and even if the CAV recording P is the last current recording rotation in the CAV of the rotation change table in FIG. If an error occurs in the test at the position of the area 48, it means that CLV recording is performed. The recording speed of the CLV recording Q is the recording speed Q at an arbitrary data recording position because the linear speed is constant.

  FIG. 6 is a diagram showing a recording start address and a recording end address for each area in the lead-out area in the present invention. In the initial state of the table, the recording start address and the recording end address are the same value. Refer to this table and record a certain number of blocks from the recording start address for each area. If a recording error occurs, change the recording end address to the address where the recording error occurred, and no recording error will occur. In this case, the recording end address is changed to the recording end address (recording end address + constant number of blocks−1).

  When recording the lead-out area after the end of user data recording, refer to this table. If the recording start address and the recording end address are the same value, the area is unrecorded and a certain number of blocks are added to the recording start address. If the value of the recording end address is less than the value obtained by subtracting 1, it is determined that there is an unrecorded part, and data is recorded in the unrecorded part, so that recording is performed in the entire lead-out area. Data can be continuous.

  7, 8, 9, and 10 show the relationship between the current recording rotation and the recording speed of the recording rotation for change obtained from the rotation change table of FIG. 5. An area on the outer peripheral side from the PMA area 34 is shown and corresponds to a data recording position when data is recorded on the optical disk. The horizontal axis indicates, in order from the left side, the PMA area 34, the lead-in area 35, 39, or 43, the middle area, and the lead-out area 37, 41, or 45. The vertical axis represents the recording speed when data is recorded on the optical disc. The recording speed is indicated by how many times the standard speed is based on the standard speed.

  The CAV recording N of 1 in FIG. 7 is the current recording rotation, and the recording speed at the start of data recording is CAV recording at the recording speed N. Since it is CAV recording, the recording speed increases as it goes to the outer periphery. The CAV recording O of 2 in FIG. 7 is a change recording rotation, and the recording speed at the start of data recording is CAV recording at the recording speed O. This change recording rotation is obtained from the rotation change table of FIG. 6 as the next recording rotation because an error occurs in the test performed at the position 3 in FIG. 7 in the current recording rotation. Therefore, the recording speed at 4 in FIG. 7 is set to be lower than the recording speed at 3 in FIG.

The CLV recording S of 1 in FIG. 8 is the current recording rotation, and the recording speed at an arbitrary data recording position is CLV recording at the recording speed S. The CLV recording T of 2 in FIG. 8 is a change recording rotation, and the recording speed at an arbitrary data recording position is CLV recording at the recording speed T. This change recording rotation is obtained from the rotation change table in FIG. 6 as the next recording rotation because an error occurs in the test performed at the position 3 in FIG. Therefore, the recording speed at 4 in FIG. 8 is set to be lower than the recording speed at 3 in FIG.

  The CAV recording P of 1 in FIG. 9 is the current recording rotation, and the recording speed at the start of data recording is CAV recording at the recording speed P. The CLV recording Q of 2 in FIG. 9 is a change recording rotation, and is a CLV recording at a recording speed Q at an arbitrary data recording position.

  This is because even if the spindle servo control system changes the current recording rotation in the CAV and lowers the recording speed, the CAV recording P which is the last current recording rotation in the CAV of the rotation change table in FIG. When an error occurs in the test at position 3 of 9, the CLV recording at a constant recording speed is performed at an arbitrary data recording position. When the recording speed is changed to CLV recording, the recording speed at an arbitrary data recording position is not necessarily lower than the recording speed of the current recording rotation. However, the recording speed at the position 4 in FIG. In order to prevent an error from occurring in the test at the position, it is necessary to make the current recording speed lower than the recording speed at 3 in FIG.

  The CLV recording S in FIG. 10 is the current recording rotation, and is the CLV recording at the recording speed S at an arbitrary data recording position. The CLV recording T of 2 in FIG. 10 is a change recording rotation, and the recording speed at an arbitrary data recording position is CLV recording at the recording speed T. This change recording rotation is obtained from the rotation change table in FIG. 5 as the next recording rotation because an error occurs in the test performed at the position 3 in FIG. Therefore, the recording speed at 4 in FIG. 10 is set to be lower than the recording speed at 3 in FIG. Further, when no problem occurs in the test performed at the position 4 in FIG. 10 with the change recording rotation, the recording speed at an arbitrary data recording position is equal to or lower than the recording speed T during actual data recording. The spindle servo control method is switched and the spindle rotation speed is changed, so that CAV (CAV recording N) in 5 in FIG. 10 to CLV (CLV recording T) in 6 in FIG. 10, CLV in 6 in FIG. 10 to 7 in FIG. The CAV (CAV recording P) in FIG. 10 and the CAV in FIG. 10 to CLV (CLV recording T) in FIG. 10 may be used for recording while utilizing the characteristics of the respective spindle servo control systems.

  Here, only the case where the spindle servo control system for change recording rotation is CLV is shown in the figure, but even if the spindle servo control system for change recording rotation is CAV, the data can be recorded at any data recording position. If the recording speed is equal to or lower than the recording speed at the position corresponding to 4 in FIG. 10, the spindle servo control method may be switched and the spindle rotational speed may be changed during data recording. If no problem occurs in the test performed at the position corresponding to 4 in FIG. 10, if the recording speed at an arbitrary data recording position is equal to or lower than the recording speed at the position corresponding to 4 in FIG. Sometimes, the spindle servo control method may be switched and the spindle rotational speed may be changed.

  INDUSTRIAL APPLICABILITY The present invention can be used for an optical disc apparatus, and an appropriate recording speed can be obtained even when a spindle motor with a small torque is used, and an optical disc apparatus with improved recording quality can be realized while avoiding a recording error. .

1 is a block diagram of an optical disc apparatus according to an embodiment of the present invention. Diagram showing each area of optical disc The figure which shows each area | region of the optical disk in this invention The flowchart explaining the change sequence of the spindle rotational speed in the present invention The figure showing the relationship between the spindle servo control system in the present invention and the current recording rotation and the recording rotation for change to be set next The figure showing the recording start address and recording end address for each area in the lead-out area in the present invention The figure showing the relationship between the data recording position and recording speed of an optical disk when the spindle servo control system of the current recording rotation in the present invention is CAV control and the spindle servo control system of the recording rotation for change to be set next is CAV control. The figure showing the relationship between the data recording position of the optical disk and the recording speed when the spindle servo control system for the current recording rotation in the present invention is CLV control and the spindle servo control system for the next recording rotation to be set is CLV control. The figure showing the relationship between the data recording position of the optical disk and the recording speed when the spindle servo control system for the current recording rotation in the present invention is CAV control and the spindle servo control system for the next recording rotation to be set is CLV control. FIG. 4 is a diagram showing that data recording is performed while switching the spindle servo control method so as to be equal to or lower than the recording speed T at the change recording rotation in the present invention and changing the spindle rotation speed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2 Spindle motor 3 Spindle motor driver 4 Pickup unit 5 Actuator driver 6 Feed motor 7 Feed motor driver 8 LD driver 9 Read amplifier 10 CD servo processor 11 CD encoder 12 ATIP detector 13 D / A converter 14 Buffer memory 15 CD- ROM decoder 16 CPU
17 ROM
18 Main memory 19 Bus 20 Jitter measuring means 21 ATAPI interface

Claims (9)

A recording method of an optical disc apparatus that performs at least one of data recording and reproduction with respect to an optical disc, wherein the user data recording is performed when recording in a lead-out area after completion of recording in a user data area on the optical disc. Prior to the recording, a predetermined number of blocks are recorded in the lead-out area, and when the predetermined number of blocks is recorded a plurality of times, no gap or overlap is provided between the predetermined number of blocks. Recording method for optical disc apparatus. 2. The recording apparatus according to claim 1, wherein when the predetermined number of blocks are recorded a plurality of times in the lead-out area, the predetermined number of blocks is sequentially arranged from the outer peripheral side to the inner peripheral side of the optical disc. Recording method for optical disc apparatus. When recording a predetermined number of blocks in the lead-out area, if a recording failure state occurs during the first recording, a recovery operation is performed once or a plurality of times, and the number of blocks is recorded in the recovery operation. 2. A recording method for an optical disc apparatus according to claim 1, wherein the recording position is changed. The recovery operation in the case of a recording failure condition is to lower the recording speed by a predetermined amount and change the laser power for recording a predetermined amount by changing the spindle motor rotation speed or changing the spindle servo control system. If the recording failure state is not resolved by the first recovery operation, at least whether the spindle motor rotation speed is changed or the spindle servo control system is changed until the recording failure state is solved. 4. The recording method for an optical disc apparatus according to claim 3, wherein the recording speed is repeatedly reduced by one of the methods. 5. The recording method for an optical disc apparatus according to claim 4, wherein, in the recovery operation, the spindle servo control system, the spindle rotation speed, and the recording laser power are changed with reference to a table stored in the memory. If a recording failure condition occurs when a predetermined number of blocks are recorded multiple times in the lead-out area, recording is interrupted and the recording error occurrence position is stored in the block recording management table so that no recording failure condition occurs. 2. A recording method for an optical disc apparatus according to claim 1, wherein the final recording position is stored in the block recording management table. The recording failure state is a state in which a recording error has occurred or at least one error rate during recording exceeds a predetermined value, or the number of block errors of the reproduction RF signal exceeds a predetermined value, or a jitter value of the reproduction RF signal exceeds a predetermined value. 4. The recording method of an optical disc apparatus according to claim 3, wherein When recording a predetermined number of blocks in the lead-out area, the error rate is less than a predetermined value, the number of block errors of the reproduction RF signal is less than the predetermined value, and the jitter value is less than the predetermined value. 2. The recording method for an optical disc apparatus according to claim 1, wherein a user data area and a lead-out area are recorded. When recording data in the lead-out area after the user data recording is completed, the data is recorded in an unrecorded location by referring to the fixed block record management table stored in the memory. 2. The recording method for an optical disc apparatus according to claim 1, wherein the recording data of the optical disc apparatus is continuous.

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