JP2007087504A - Apparatus, method, program and medium for recording optical information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for recording optical information which realizes stable recording to a rewritable optical information recording medium having a plurality of recording layers. <P>SOLUTION: The apparatus for recording optical information is composed of a system controller 21, a recording and reproducing circuit 22 for performing recording/reproducing, an optical pickup 23, a program memory 24 wherein a control program of the system controller 21 is stored, a data memory 25 for temporarily holding data to record and reproduce in a DVD-RW disk 30, an internal bus 26, an IF 27 for performing the interface of a host device 10 and the internal bus 26, and a recording state detection circuit 28. In the apparatus, as a deciding element for deciding a parameter for recording/reproducing laser power/asymmetry etc., the number of times of carrying out recording is added to conventional elements to carry out stable recording. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical information recording apparatus, an optical information recording method, an optical information recording program, and an optical information recording medium.

  Currently, DVD-R discs, which are write once optical discs according to the DVD (Digital Versatile Disc) standard, and DVD-RW discs, which are rewritable optical discs, are widely used. FIG. 18A schematically shows a cross-sectional structure of a DVD-R disc or DVD-RW disc having only one recording layer. In FIG. 1, a disk 100 has a power calibration area (PCA) 101, a recording management area (RMA) 102, and a lead-in area (Lead-In) from the inner periphery toward the outer periphery. 103, a data area 104, and a lead-out area 105.

  The PCA area 101 and the RMA area 102 constitute an R information area 106. The data area 104 is an area where user data is recorded. The lead-in area 103 and the lead-out area 105 are buffer areas provided for overrun of the recording / reproducing head (optical pickup) when accessing the data area 104. A part of the lead-in area 103 as shown in FIG. 18B is called a control data zone. There, information on the entire disc such as the size of the disc and reference conditions for recording such as recording power and recording waveform pattern are recorded in advance when the disc is manufactured.

   The optical disk drive apparatus trial-writes a predetermined signal while changing the recording conditions on the target disk 100 before starting the main recording on the data area of the DVD-R disk or the DVD-RW disk. The optimum recording condition is acquired based on the characteristics of the reproduction signal obtained by reproducing the area, and the main recording is performed under the optimum recording condition. Thereby, good recording quality can be obtained.

   Obtaining the optimum recording condition based on the reproduction signal from the trial-written area in this way is called OPC (Optimum Power Control), but the PCA area 101 in FIG. 18A is prepared for performing this OPC. It is an area that has been. Also, the recording management area (Recording Management Area (RMA)) 102 in FIG. 18A is a record for managing the transition of the recording state of the lead-in area 103, the data area 104, and the lead-out area 105, and OPC information. This is an area where management information is recorded. In the RMA 102, recording is performed in units of RMD (Recording Management Data) blocks that are blocked and error-correction-coded in the same manner as user data in the data area 104.

   As shown in the perspective view of FIG. 19, the DVD-R disc and the DVD-RW disc have a groove track 201 as an information track on a recording layer and a land track 202 for guiding a light beam 203 to the groove track 201. Are alternately formed in the disk radial direction. Also, on the land track 202, address information and the like on the disc are recorded as land pre-pits (LPP) 204 at the pre-format stage at the time of disc manufacture (see, for example, Patent Document 1). Recording on a DVD-R disc or a DVD-RW disc is performed based on the LPP 204.

In addition to the address information, the LPP stores reference conditions for recording such as recording power and recording waveform pattern.
Now, the capacity that the user wants to record is increasing year by year, and DVD-R discs and DVD-RW discs having two recording layers are being developed to meet this demand. FIG. 20 is a schematic cross-sectional view of an example of the dual-layer DVD-R disc and DVD-RW disc. As shown in the figure, in a single-sided dual-layer DVD-R disc or DVD-RW disc, a first recording layer 301 and a second recording layer 302 are laminated in the optical axis direction of a light beam 402 during recording and reproduction. Thus, the light beam 402 is condensed on the first recording layer 301 by the objective lens 401 or transmitted through the first recording layer 301 and condensed on the second recording layer 302.

The recording area of the first-layer recording layer 301 closer to the optical pickup has a PCA area 311, an RMA area 312, a lead-in area (Lead-In) 313, and a data area (Data Area) from the inner periphery toward the outer periphery. It is divided into 314 and a middle area 315. The recording area of the second recording layer 302 includes a PCA area 321, an RMA area 322, a lead-out area 323, a data area 324, and an intermediate area from the inner periphery toward the outer periphery. It is divided into an area (Middle Area) 325.
That is, in the first recording layer 301, the lead-out area 105 is changed to the intermediate area 315 with respect to the single-layer DVD-R disc shown in FIG. The second recording layer 302 has substantially the same structure as the first recording layer 301, but a lead-out area 323 is provided instead of the lead-in area 313. The first recording layer 301 is recorded from the inner peripheral side toward the outer peripheral side, and the second recording layer 302 is recorded from the outer peripheral side toward the inner peripheral side.

Before the main recording in the data area of the first recording layer 301, OPC is performed in the PCA area 311 of the first recording layer 301, and before the main recording in the data area of the second recording layer 302, the second layer is recorded. OPC is performed in the PCA area 321 of the recording layer 302. The usage of the PCA area is determined as shown in FIG. That is, for the PCA area 311 of the first recording layer 301, trial writing is performed from the area boundary on the outer peripheral side to the inner peripheral side. On the other hand, for the PCA area 321 of the second recording layer 302, trial writing is performed from the area boundary on the inner circumference side to the outer circumference side. At this time, the area of the first recording layer located on the incident side of the second-layer PCA area 321 is left unrecorded. Accordingly, when the OPC process is performed a plurality of times and the radial distance between the recorded small area of the PCA area 311 and the recorded small area of the PCA area 321 becomes a certain distance or less, the further OPC process is performed. Cannot be done.
Since the DVD-RW disc is a rewritable medium, in this case, the OPC process can be performed again by DC erasing the recorded area in the PCA area.

  Between the optimum recording power of the second recording layer 302 obtained in the unrecorded state of the first recording layer 301 and the optimum recording power of the second recording layer 302 obtained in the recording state of the first recording layer 301. Is known to have a difference inherent to each optical disc. Recording in the data area of the second recording layer 302 is determined to be performed through the recorded first recording layer 301. Therefore, the value of this power difference is pre-recorded on each optical disc. The optical disc apparatus records the first recording layer 301 by subtracting the value of the pre-recorded power from the optimum recording power of the second recording layer 302 obtained when the first recording layer 301 is not recorded. The optimum recording power of the second recording layer 302 in the state is calculated.

  The DVD-RW disc is a disc that can be rewritten a plurality of times, and the number of rewrites is several thousand times or more. The DVD-RW disc uses a phase change material. For recording on a DVD-RW disc, a light beam whose recording power changes to ternary values Pw, Pe, and Pb as shown in FIG. 2, for example, is used. Pw is a writing power, and this power changes the state of the recording film from the crystalline state to the amorphous state to form a mark. Pe is an erasing power, and the power Pe returns from the amorphous state to the crystalline state, and the old mark is erased (overwritten). Pb is a bottom power, which corresponds to the power at the bottom of a divided pulse obtained by so-called pulse division recording, and functions to prevent heat from being diffused by light beam irradiation during recording.

  As described in Patent Document 2, an asymmetry value β (an index representing the non-target property of the HF signal) or a modulation degree is used as a characteristic parameter for determining the quality of a recording state when performing OPC of a phase change optical disc. The value γ obtained from is used.

In Patent Document 2, first, the erasing power and the bottom power are fixed, the writing power is changed, the test recording signal is recorded, the portion is reproduced, and the characteristic parameters for judging the quality of the recording state are measured. Thus, the optimum writing power is obtained. Next, use the writing power, fix the bottom power, change the erasing power, record the test recording signal, and reproduce the portion to measure the characteristic parameters that determine the quality of the recording state Then, the optimum erasing power is obtained. Finally, the write power and erase power are used, the bottom power is changed, the test recording signal is written, the portion is reproduced, and the characteristic parameters for judging the quality of the recording state are measured, thereby determining the optimum bottom. Ask for power. A method is described in which the recording is performed in the data area using the writing power, the erasing power, and the bottom power obtained as described above. Here, it is described that β or γ or an error rate is used as a characteristic parameter for determining the quality of the recording state. Since the optimum recording state is the recording state in which the error rate is finally the best, it seems that the error rate itself may be used as a characteristic parameter for determining the quality of the recording state. However, since an error rate that can withstand practical use cannot be measured unless a large amount of data is actually recorded, it takes a long time to use for OPC and consumes a lot of PCA area. It is not actually used as a characteristic parameter.
JP-A-10-293926 Japanese Patent No. 3259642

  In a DVD-RW disc having a structure with two recording layers, the recording film of the first recording layer is considerably thinner than a single-layer DVD-RW disc in order to transmit the recording laser light to the second recording layer. There is a need to. Therefore, it is difficult to manage the recording conditions as compared with a single-layer DVD-RW disc. In our research, it has been found that if the optimum recording is not strictly performed, particularly in the first recording layer, the recording / reproducing state deteriorates, and many errors occur during reproduction or defective reproduction occurs. It has also been found that the recording / reproducing characteristics change with the number of recordings. Here, the number of times of recording is the first time when recording on a new disc shipped from the factory for the first time, and then the second time when recording again on the recorded portion. For example, even when DC erasure is performed between the first time and the second time, the recording / reproducing state of the second recording is greatly different from the first time. FIG. 22 shows the measurement results of the number of times of recording and the reproduction error rate when recording is performed using the same recording conditions. As can be seen from the figure, the error rate at the time of the second recording is relatively poor, and the reproduction error rate is relatively good for the 1000th time and after the 10th time. 23A and 23B show measurement results of the write power Pw and the reproduction error rate, and measurement results of the erase power Pe and the reproduction error rate. As can be seen from the figure, the reproduction error rate greatly changes with the change in the write power Pw or the erase power Pe. It can also be seen that there is a difference between the optimum writing power Pw or erasing power Pe at the first recording and the optimum writing power Pw or erasing power Pe at the second recording.

  An object of the present invention is to perform good recording on a recording medium having characteristics such as the first recording layer of a DVD-RW disc having two recording layers based on the above knowledge.

Therefore, in order to solve the above problems, the present invention provides the following method, apparatus, program, and recording medium.
(1) A rewritable optical disc, in which recording conditions are changed in various ways, a test signal is recorded on the optical disc, and the recorded test signal is reproduced to detect a predetermined characteristic parameter for judging whether the recording state is good or bad Then, the recording condition is obtained so that the characteristic parameter is close to a predetermined set value, and actual recording is performed under the recording condition determined by calculating the obtained recording condition and the parameter corresponding to the number of times of recording. An optical disc characterized in that a parameter corresponding to the number of times of recording used in an optical disc recording method is recorded in advance.
(2) A rewritable optical disc, in which test signals are recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to detect a predetermined characteristic parameter for judging whether the recording state is good or bad Thus, the optical disc is an optical disc in which the setting value used in the optical disc recording method for determining the recording condition so that the characteristic parameter is close to a predetermined setting value and performing actual recording under the recording condition is recorded in advance. An optical disc characterized in that the set value that varies depending on the number of times of recording is recorded.
(3) A recording method for recording on a rewritable optical disc, wherein a test signal is recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to determine whether the recording state is good or bad. Is determined by calculating the recording condition and the parameter corresponding to the number of times of recording. Optical disc recording method for performing actual recording with the use of the optical disc.
(4) A recording apparatus for recording on a rewritable optical disc, wherein a test signal is recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to determine whether the recording state is good or bad. Is determined by calculating the recording condition and the parameter corresponding to the number of times of recording. Optical disk recording device that performs actual recording with the.
(5) A recording program for causing a recording means to perform a recording process on a rewritable optical disc, recording a test signal on the optical disc under various recording conditions, and reproducing and recording the recorded test signal Detects a predetermined characteristic parameter that determines whether the condition is good, calculates a recording condition so that the characteristic parameter is close to a predetermined setting value, and calculates the calculated recording condition and a parameter corresponding to the number of times of recording An optical disc recording program for causing a storage means to execute actual recording under the recording conditions determined in this way.
(6) A recording method for recording on a rewritable optical disc, wherein a test signal is recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to determine whether the recording state is good or bad. An optical disk recording method comprising: determining a recording condition so that the characteristic parameter is close to a predetermined set value corresponding to the number of recordings, and performing actual recording under the recording condition .
(7) A recording apparatus for recording on a rewritable optical disc, wherein a test signal is recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to determine whether the recording state is good or bad The optical disk recording apparatus is characterized in that a recording condition is detected, a recording condition is determined so that the characteristic parameter is close to a predetermined set value corresponding to the number of recordings, and actual recording is performed under the recording condition .
(8) A recording program for causing a storage means to execute recording processing on a rewritable optical disk, recording a test signal on the optical disk under various recording conditions, and reproducing and recording the recorded test signal A predetermined characteristic parameter for determining the quality of the state is detected, a recording condition is determined so that the characteristic parameter is close to a predetermined set value corresponding to the number of times of recording, and actual recording is stored under the recording condition An optical disc recording program that is executed by the program.
(9) Write power for forming marks by changing the state of the recording film from the crystalline state to the amorphous state, and erasing power for returning from the amorphous state to the crystalline state and erasing old marks to form a mark non-formation section Recording of a rewritable optical disc in which new information is written while erasing old information recorded on the optical disc using a light beam in which the bottom power of the divided pulse in the mark formation section by pulse division recording is set In the method, first, the ratio of the erasing power and the writing power is fixed to an appropriate value, the writing power is changed variously, the test signal is recorded on the optical disc, the recorded test signal is reproduced, and the reproduction signal is reproduced. The value related to the degree of modulation is detected, the writing power is determined so that a value related to the degree of modulation close to a preset value is obtained, and then The recording power is fixed to the determined value, the erasing power is changed in various ways, the test signal is recorded on the optical disc, the recorded test signal is reproduced, and the value relating to the asymmetry of the reproduction signal is detected, The erasing power is determined so as to obtain a value related to asymmetry close to a preset value, and actual recording is performed by controlling the power of the light beam by a combination of the determined values of the writing power and the erasing power. (10) Write power for forming a mark by changing the state of the recording film from the crystalline state to the amorphous state, and a mark non-formation section in which the old mark is erased by returning from the amorphous state to the crystalline state Using an optical beam in which the erasing power at which the laser beam is formed and the bottom power at the bottom of the divided pulse in the mark formation zone by pulse division recording are set. In a rewritable optical disk recording device that writes new information while erasing old information recorded on the disk, the write power is varied by first fixing the ratio of erasing power and writing power to an appropriate value. Instead, the test signal is recorded on the optical disc, the recorded test signal is reproduced, the value relating to the modulation degree of the reproduction signal is detected, and the value relating to the modulation degree close to the preset value is obtained. Next, the write power is determined, the write power is fixed to the determined value, the erasing power is changed variously, the test signal is recorded on the optical disc, the recorded test signal is reproduced, and the reproduction signal is reproduced. And determining the erasing power so as to obtain a value related to the asymmetry close to a preset value, and a combination of the determined values of the writing power and the erasing power. An optical disk recording apparatus characterized by performing actual recording by controlling the power of the light beam together.
(11) Write power for forming marks by changing the state of the recording film from the crystalline state to the amorphous state, and erasing power for returning from the amorphous state to the crystalline state and erasing old marks to form a mark non-formation section Recording of a rewritable optical disc in which new information is written while erasing old information recorded on the optical disc by using a light beam in which the bottom power of the divided pulse in the mark formation section by pulse division recording is set In a program for causing the storage means to execute processing, first, the test signal is recorded on the optical disc by changing the write power in various ways by fixing the ratio of the erase power and the write power to an appropriate value, and the recorded test signal , And the value related to the modulation degree of the reproduction signal is detected, and the value related to the modulation degree close to the preset value is obtained. The write power is determined as follows, then the write power is fixed to the determined value, the erasing power is changed variously, the test signal is recorded on the optical disc, and the recorded test signal is reproduced and reproduced. A value related to the asymmetry of the signal is detected, an erasing power is determined so as to obtain a value related to the asymmetry close to a preset value, and a light beam is obtained by a combination of the determined values of the writing power and the erasing power. An optical disc recording program for controlling the power of the recording medium and causing the storage means to execute actual recording.
(12) The recording method according to (9), wherein the write power determined so as to obtain a value related to a modulation factor close to the preset value or / and an asymmetry close to the preset value are obtained. An optical disc recording method characterized in that a value obtained by multiplying an erasing power determined so as to obtain such a value by a coefficient corresponding to the number of times of recording is a writing power or / and an erasing power of actual recording.
(13) The recording apparatus according to (10), wherein the write power determined to obtain a value related to a modulation degree close to the preset value and / or an asymmetry close to the preset value are obtained. An optical disc recording apparatus characterized in that a value obtained by multiplying an erasing power determined so as to obtain such a value by a coefficient corresponding to the number of times of recording is a writing power or / and an erasing power of actual recording.
(14) The recording program according to (11), wherein the write power determined to obtain a value related to a modulation factor close to the preset value and / or an asymmetry close to the preset value An optical disk recording program for causing a storage means to execute actual recording using a value obtained by multiplying an erasing power determined so as to obtain such a value by a coefficient corresponding to the number of recording times as a writing power or / and an erasing power .
(15) The recording method according to (12), wherein the preset value when determining the writing power so as to obtain a value related to a modulation degree close to the preset value is determined according to the number of times of recording. Different values depending on the number of times of recording, and / or determining the erasing power so as to obtain a value related to asymmetry close to the preset value. Optical disc recording method.
(16) The recording apparatus according to (13), wherein the preset value when determining the writing power so as to obtain a value related to a modulation degree close to the preset value is determined according to the number of times of recording. Different values depending on the number of times of recording, and / or the erasing power is determined so that a value related to asymmetry close to the preset value is obtained. Optical disk recording device.
(17) The recording program according to (14), wherein the preset value when determining the writing power so as to obtain a value related to a modulation degree close to the preset value is determined according to the number of times of recording. And / or storing the preset value when determining the erasing power so as to obtain a value related to asymmetry close to the preset value, depending on the number of times of recording. An optical disc recording program that is executed by a means.

  According to the present invention, it is possible to perform good recording on a recording medium having characteristics like the first recording layer of a DVD-RW disc having two recording layers.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a recording / reproducing system including an embodiment of an optical information recording apparatus according to the present invention. In the figure, the recording / reproducing system includes a host device 10, an optical disc device 20 which is an embodiment of the optical information recording device of the present invention, and a single side 2 having two recording layers as shown in FIG. Layer DVD-RW disc 30. The host device 10 instructs the optical disc device 20 to record or reproduce the DVD-RW disc 30. The host device 10 is, for example, a personal computer. The host device 10 and the optical disk device 20 may be housed in the same housing. Such a form is employed in an optical disc recorder, for example. The DVD-RW disc 30 is loaded in the optical disc apparatus 20.

  The optical disk apparatus 20 is connected to the system controller 21 for controlling the entire apparatus, the recording / reproducing circuit 22 for recording and reproducing on the single-sided dual layer DVD-RW disk 30, and the recording / reproducing circuit 22 to emit and reflect the light beam. An optical pickup 23 for receiving a beam, a program memory 24 in which a control program for the system controller 21 is stored, a data memory 25 for temporarily storing data to be recorded on and reproduced from the DVD-RW disc 30, and a configuration thereof It comprises an internal bus 26 that connects elements, an IF 27 that interfaces the host device 10 with the internal bus 26, and a recording state detection circuit 28. The recording / reproducing circuit 22 and the optical pickup 23 are a recording means for recording test information and management information on a single-sided dual-layer DVD-RW disc 30 (information recording medium having a plurality of recording layers), and information recorded on the disc. It functions as a reproducing means. The recording state detection circuit 28 functions as a means for performing measurement for calculating a characteristic parameter for determining whether the recording state is good or not when reproducing the portion where the trial writing has been performed. The measurement value measured by the recording state detection circuit 28 is sent to the system controller 21 via the internal bus 26, and the system controller 21 performs an operation using the measurement value according to the contents of the program memory 24 to calculate a characteristic parameter. The recording condition is determined from the calculation result.

  The single-sided dual-layer DVD-RW disc 30 is a phase change type recording medium, and records information by reversibly changing the crystal phase and the amorphous layer. As shown in FIG. 2, actual recording is performed by using a light beam as a light emission waveform of a multi-pulse train. The drive pulse of the light beam is a pulse modulated by recording data (recording data, NRZI data). For example, in the period of certain NRZI data shown in the figure, a drive pulse as shown in the figure is generated.

  In FIG. 2, “Pw” is a level as write power, “Pe” is a level as erase power, and “Pb” is a level as bottom power. Further, “T” in FIG. 2 is a channel clock period, and “Ttop” and “Tmp” are pulse periods of write power. As can be seen from FIG. 2, the drive power of the erase power Pe is generated during the low level period of the NRZI data, while the write power Pw and the bottom power Pb alternately appear during the high level period of the NRZI data. It becomes.

  As described above, during the high level period of the NRZI data, the write power of the level Pw and the bottom power of the level Pb are alternately output, so that the condition of the phase change type recording medium is changed by the rapid cooling condition of heating → cooling. An amorphous phase is formed in the recording layer, and in the low level period of the NRZI data, a crystalline phase is formed in the recording layer of the phase change type recording medium under the condition of slow cooling only by heating with the erasing power of level Pe.

  In the data area or the like, direct over recording is used in which recording is performed on a recorded small area with a similar light emission waveform. On the other hand, in the PCA area, a technique is used in which OPC processing is performed by performing DC erasure with a predetermined erasing power after performing DC erasure on a small area once trial-written. This is because the optimum recording power may not be accurately obtained in direct over recording.

   A specific example of the recording state detection circuit 28 is shown in FIG. A reproduction signal obtained by reading the recording signal of the DVD-RW disc 30 with the light beam emitted from the optical pickup 23 is output from the optical pickup to the recording / reproducing circuit 22 and the recording state detecting circuit 28. What is input to the recording state detection circuit 28 is an HF (High Frequency) signal in the reproduction signal. The HF signal is input to the peak level detection circuit 43 in FIG. The output of the peak level detection circuit 43 is A3. The peak level detection circuit 43 detects the + side peak of the HF signal by analog processing.

Further, the HF signal is cut by a high-pass filter 40 in FIG. 3 to obtain a signal as shown in FIG. The output of the high pass filter 40 is input to a peak level detection circuit 41 and a bottom level detection circuit 42. The outputs of the peak level detection circuit 41 and the bottom level detection circuit 42 are A1 and A2, respectively. The peak level detection circuit 41 and the bottom level detection circuit 42 detect the + side peak and the − side peak of the HF signal from which the DC component is cut, by analog processing, respectively. The data of A1 to A3 is sent to the system controller, and using these data, calculation for obtaining characteristic parameters is performed in the system controller. One of the characteristic parameters is a value β indicating the degree of asymmetry of the HF signal. β is obtained by the calculation of Equation 1 below.

β = (A1 + A2) ÷ (A1−A2) Equation 1

One of the other characteristic parameters is a value m indicating the modulation degree of the HF signal. The modulation degree m is obtained by the calculation of the following formula 2.

m = (A1-A2) ÷ A3 Expression 2

The modulation degree m changes according to the write power Pw as shown in FIG. In general, when the writing power Pw is low, the amplitude of the reproduced HF signal is small, so the modulation degree m is small. As the writing power Pw increases, the amplitude of the reproduced HF signal increases, so that the modulation degree m increases. When the write power Pw increases to some extent, the modulation degree m becomes saturated. Since there are few reproduction errors when recording is performed with the writing power Pw at the beginning of saturation, the writing power value at that time can be determined as the optimum writing power Pwo.

As another method of determining the quality of the recording state based on the modulation degree, there is a method of using the following parameter γ obtained from the characteristic of the modulation degree m as shown in the following formula 3.

γ = (dm / dPw) × (Pw / m) Equation 3

That is, the parameter γ is obtained by differentiating the characteristic of the modulation degree m. γ also varies with the write power Pw as shown in FIG.

  The optical disk device 20 which is an embodiment of the optical information recording apparatus of the present invention shown in FIG. 1 performs the operation of any one of the embodiments described below in accordance with a program stored in the program memory 24. There is a feature in the point. Moreover, the DVD-RW disc 30 which is an embodiment of the optical information recording medium of the present invention is pre-recorded with data for performing the operation of any one of the embodiments described below. Or / and an area for storing data is secured.

  FIG. 6 shows the R information area of the single-sided dual layer DVD-RW disc 30 for explaining the test writing operation of the optical information recording apparatus according to the first embodiment of the present invention. FIG. 6A shows the state of the R information area of a new disc.

When the DVD-RW disc 30 is loaded into the optical disc device 20 or when an instruction is received from the host device 10, the optical disc device 20 performs an OPC operation. The operation when performing OPC in the PCA area 311 of the first recording layer 301 will be described with reference to the flowcharts of FIGS.
When the OPC operation is started, first, the latest RMD of the DVD-RW disc 30 is read to obtain the next area after the small area used in the previous OPC operation (S1). In the case of the new disc in FIG. 6A, since there is no small area used in the previous OPC, the first small area used in the PCA area 311, that is, the outermost small area in the PCA area 311 is used. To do. Access to the small area is performed based on address information recorded as LPP.
Further, the PCA area use count table is read (S2). The PCA area usage count table is data stored in byte positions m to m + 41 of RMD data, is created by the optical disc device 20, and is written in the RMA together with other RMD data. In the case of the new disc in FIG. 6A, the RMD itself is not recorded, or even if it is recorded, all the data from byte positions m to m + 41 in the PCA area are 0. Therefore, the past use count of the small area to be used is 0 (S3).

Next, as shown in FIG. 9, the test power of the predetermined test signal is written by changing the write power Pw to 10 levels (S4).
At this time, the bottom power Pb of the write pulse in FIG. 2 is fixed at a predetermined value, and the erase power Pe is changed with the write power as a value obtained by multiplying the write power by a predetermined value ε. For example, ε has a value of 0.5. As shown in FIG. 9, the range in which the write power is applied is referred to as the OPC range, and the central power that is the reference at this time is referred to as Pdef. For the OPC range, there are methods such as shaking in 10 steps in the range of + 40% and -30% with respect to Pdef, or shaking in increments of 1 mW in the range of +5 mW and -4 mW with respect to Pdef. It should be noted that the number of steps is not necessarily 10 and may be an appropriate number of steps.

Next, while reproducing the small area which has been trial-written (S5), the system controller 21 calculates γ for each writing power using the value measured by the recording state detection circuit 28 (S6). The write power Ptarget is determined such that the calculated value of γ is a predetermined set value and a value close to γtarget. Further, a value obtained by multiplying Ptarget by a predetermined coefficient ρ as shown in the following equation 4 is set as the optimum write power Pwo (S7).

Pwo = ρ × Ptarget Equation 4

γtarget is 1.5, for example, and ρ is 1.22, for example. As the ε, Pdef, γtarget, and ρ values, values recorded in advance in the LPP or the control data zone at the time of manufacturing the disk may be used, or measurement results for each commercially available disk type in the nonvolatile memory in the optical disk device 20 may be used. May be stored and the value may be used.

  In Patent Document 2, it is described that an asymmetry value may be used as a characteristic parameter for obtaining an optimum value of write power. However, in the case of the first recording layer of a single-sided dual-layer DVD-RW disc. It is easier to obtain good characteristics by using the modulation degree. FIG. 10 shows a graph of the write power Pw and the values of γ and β obtained in our study. The values of γ calculated from the measured values are aligned on the curve throughout the OPC range. Therefore, it is possible to accurately determine the write power Ptarget at which the calculated γ is close to the value of γtarget. On the other hand, the value of β varies in the vicinity of the optimum recording power, and since the amount of change is small, it is difficult to accurately determine Pwo using the value of β. When the optimum writing power Pwo is determined experimentally by using the value of β, there are many cases where it deviates from the optimum value.

  Next, similar to FIG. 9, the erasing power Pe is changed to about 10 levels, and a test write of a predetermined test signal is performed (S8). Use an area in the small area that has not yet been test-written. At this time, the writing power is set to Pwo obtained previously, and the bottom power Pb is fixed at a predetermined value. Next, while reproducing the test-written small area (S9), the system controller 21 calculates β for each erasing power using the value measured by the recording state detection circuit 28 (S10). The erasing power Peor at which the calculated β value is a predetermined set value and a value close to βtarget is determined (S11). βtarget has a value of 0.04, for example. As this value, a value recorded in advance in the LPP or the control data zone at the time of manufacturing the disc may be used, or a measurement result of each commercially available disc type is stored in advance in a nonvolatile memory in the optical disc apparatus 20. The value may be used.

  In Patent Document 2, it is described that the degree of modulation may be used as a characteristic parameter for obtaining the optimum value of the erasing power Pe. However, in the case of a single-sided dual layer DVD-RW disc, an asymmetry value is used. Good characteristics can be obtained more easily. FIG. 11 shows a graph of the erase power Pe and the values of γ and β obtained in our study. It is on the β value straight line calculated from the measured value and the amount of change is relatively large. Therefore, it is possible to accurately determine the erasing power Peor at which the calculated β value is close to the target value βtarget. On the other hand, since the value of γ calculated from the measured value hardly changes within the OPC range, it is difficult to accurately determine Peor using the value of γ. When the optimum erasing power Peor is determined experimentally by using the value of γ, there are many cases where it deviates from the optimum value.

  Next, the erase power coefficient μ is obtained by applying the past use count of the small area obtained previously to the erase power coefficient table. The erasing power coefficient table is stored and recorded as information in the control data zone in the LPP or lead-in when the disc is manufactured. The erasing power coefficient table is acquired from the control data zone in the LPP or lead-in when the optical disc apparatus 20 loads the disc 30 and is stored in the internal data memory 25.

  FIG. 12A shows the erase power coefficient table portion of the data stored in the LPP or control data zone. The byte positions N to N + 3 are the positions. The 8-bit data stored at each byte position has a value as shown in FIG. For example, 06h is stored in the byte position N, which indicates that the value of the erase power coefficient μ is 1.30.

  The erasing power coefficient μ has the following meaning. In our research, in the case of the first recording layer of a single-sided dual-layer DVD-RW disc, it has been found that when the optimum erasing power Peor is obtained by the above-described method, Peor has a recording frequency dependency. This is a phenomenon that has not been known in the past. FIG. 13 shows the measurement result of β when recording is performed using the optimum write power and optimum erase power separately obtained and the number of times of recording is increased. As can be seen from the figure, β is small in the first recording, gradually increases in the second and third times, and is substantially constant after the fourth.

  Therefore, when the small area where the OPC test writing has been performed is the first recording, the erasing power Peor obtained so as to be close to βtarget is smaller than the optimum erasing power. This is because the value of β has a characteristic of decreasing with increasing erase power. The erasing power coefficient μ is a coefficient for compensating for this.

When the small area where the OPC test writing has been performed is the first recording, the value μ1 = 1.30 indicated by the data at the position of the byte N in the erase power coefficient table is multiplied by the erase power Peor obtained in step S11. Thus, the optimum erasing power Peo is calculated by the following equation 5.

Peo = μ1 × Peor Formula 5

Similarly, when the small area where the OPC test writing is performed is the second recording, the value μ2 = 1.25 indicated by the data at the position of byte N + 1 in the erasing power coefficient table and the erasing power obtained in step S11. Based on Peor, the optimum erasing power Peo is calculated by the following equation (6).

Peo = μ2 × Peor Equation 6

Similarly, in the case of the third recording, the value μ2 indicated by the data at the position of N + 2 is used. In the case of the fourth recording, the value μ3 indicated by the data at the position of N + 3 is used.

As described above, the value of β is a substantially constant value after the fourth time. Therefore, in the case of recording after the fifth time, the erasing power coefficient μ is not used, and is optimal as shown in the following Expression 7. The erasing power is determined (S12).

Peo = Peor (7)

Before the end of the OPC operation, the address information of the small area in the PCA area used this time is stored in the RMD and recorded in the RMA (S13). As the address information, a value recorded as LPP is used.

  When the OPC operation as described above is executed many times, the small area where trial writing has been performed in the PCA area increases as shown in FIG. 6B. As shown by an arrow 61 in FIG. 6B, the PCA area 311 of the first recording layer is used for OPC from a small area on the outer peripheral side. On the other hand, the PCA area 321 of the second recording layer is used for OPC from a small area on the inner peripheral side as indicated by an arrow 62.

When the number of OPCs is further increased, the state of the PCA area becomes as shown in FIG. In FIG. 6C, the distance between the innermost radial position of the used area of the PCA area 311 of the first recording layer and the outermost radial position of the used area of the PCA area 321 of the second recording layer is as follows. It is less than the threshold value Wth. In such a state, there is no new small area that can be used for trial writing in the PCA area, so the optical disc apparatus 20 DC erases the recorded small area. This may be performed based on a command from the host device 10 or may be performed automatically by the optical disc device 20 without a command. Here, the PCA area 311 of the first recording layer is used for trial writing from the outermost address S to the position of the address A in the PCA area 311, and the values of the address S and the address A are used in the optical disc apparatus 20. Stored in the data memory.
In DC erasing, irradiation is performed while maintaining the recording power of the light beam at the erasing power. In the state where the DC erasure is completed, the PCA area is in an unrecorded state as in FIG. However, unlike the case of a new disc, the PCA area 311 of the first recording layer is subjected to one trial write from the address S to the position of the address A, and then DC erased. In order to indicate this, the address S, the address A, and the number of trial writing “1” are stored in the RMD in the form of the number of times of use and recorded in the RMA of the disc. FIG. 14 shows the state of byte positions in the RMD usage count table. Address information S is stored in byte positions m to m + 2, address information A is stored in m + 3 to m + 5, and “1” indicating the number of uses is stored in m + 6.

In the OPC operation for the PCA area 311 of the next first recording layer, the PCA area 311 is used again from the outermost small area. At that time, by reading the RMD recorded as described above, the number of times of use of the small area is acquired (S2). If the address of the small area to be used is P, the address P is compared with the address S stored at byte positions m to M + 2 and the address A stored at m + 3 to m + 5 in the number-of-uses table. If P is found to be within the range of address S and address A, it can be seen from the data at byte position m + 6 that the number of uses is one. Therefore, it can be seen that the current trial writing is the second recording (S3). Therefore, in step S12, the value at the position N + 1 in the erasing power coefficient table is used.
On the other hand, when the address P is on the inner circumference side than the address A, the address stored in the byte positions m + 7 to m + 9 is read next. Since the value is 00h, it can be seen that the number of uses is 0 in the area on the inner circumference side from the address A. Accordingly, it is determined that the current trial writing is one-time recording, and the value at the position N in the erasing power coefficient table is used.
FIG. 6D shows a state where the OPC operation is performed as described above, and there is no longer a small area that can be used for test writing. In the case of FIG. 6D, regarding the first recording layer PCA area 311, the area from the outermost address S to the small area at the address B in the PCA area 311 is used for test writing. From this state, the PCA area is DC erased. After the DC erase, the data in the RMD usage count table is updated and recorded in the RMA of the disc. In FIG. 6D, the address B is on the outer peripheral side than the address A. A use frequency table in this case is shown in FIG. In the figure, address information S is stored from byte positions m to m + 2, address information B is stored from m + 3 to m + 5, and “2” of the number of uses is stored in m + 6. Address information A is stored in byte positions m + 7 to m + 9, and “1” indicating the number of uses is stored in m + 10. On the other hand, when the address B is on the inner circumference side than the address A, the byte positions of the address A and the address B are interchanged in the table of FIG. When address A is equal to address B, “02h” is stored in byte position m + 6 in FIG. 15, and “00h” is stored in byte positions m + 7 to m + 10.

After DC erasure, the OPC is used again from the outermost small area of the PCA area 311 of the first recording layer. At this time, by reading the RMD recorded as described above, the number of times the small area is used Is acquired (S2). When the address of the small area to be used is Q, Q is compared with address S, address B, and address A stored in the use count table of FIG. If the address Q is found to be within the range of the address S stored in the byte positions m to m + 2 and the address B stored in the m + 3 to m + 5, the number of uses is two times from the data at the byte position m + 6. It can be seen that this test writing is the third recording (S3). Therefore, in step S12, the value at the position N + 2 in the erase power coefficient table is used as the erase power coefficient μ.
If the address Q is found to be within the range of the address B stored at byte positions m + 3 to m + 5 and the address A stored at m + 7 to m + 9, the number of uses is one from the data at byte position m + 10. It can be seen that this test writing is the second recording (S3). Therefore, in step S12, the value at the position N + 1 in the erase power coefficient table is used as the erase power coefficient μ. When address Q is on the inner circumference side from address A, since “00h” is stored after byte position m + 11, it can be seen that the current test writing is the first recording, so the erasing power The value at the N position in the erase power coefficient table is used as the coefficient μ.

  As described above, every time DC erasure is performed on the PCA area 311 of the first recording layer, the use number table indicating the number of times of recording in the area is updated. Here, when the number of uses of a certain area in the PCA area 311 exceeds 4, the number of uses stored in the use count table is not necessarily increased to 5, 6,. You can leave it. This is because the erasing power coefficient is 1 in the fifth and subsequent trial writings.

As described above, in this embodiment, first, the ratio of the writing power and the erasing power is made constant, the writing power is changed, the test recording signal is written, the portion is reproduced, and the target modulation degree is obtained. The writing power at which a close value is obtained is obtained, and the writing power at the time of recording in the data area is determined from the value. Next, the writing power is fixed to that value, the erasing power is changed, the test recording signal is written, the portion is reproduced, and the erasing power at which a value close to the target asymmetry value is obtained is obtained, By determining the erasing power at the time of recording in the data area from the value, it is possible to reliably determine the optimum writing power and erasing power.
Further, the number of trial writings performed in the PCA area of the first recording layer is recorded on the disc, and the value is read during the OPC operation to determine how many times the trial writing to the small area is recorded. By determining the erasing power at the time of recording in the data area using the erasing power coefficient corresponding to the number of times, the optimum erasing power can be stably and irrespective of the number of times the small area is recorded in the PCA area. Can be obtained.
Further, by recording the data giving the relationship between the number of times of recording and the erasing power coefficient at the time of manufacturing the disk, the convenience of the disk can be increased since it can be reproduced and used even on a newly marketed disk.

By the way, in the case of a DVD-RW disc, the RMA area may be erased together with the data area in order to record new data in the data area. Even in such a case, the data of the usage count table needs to be temporarily stored in the data memory 25 in the optical disc apparatus 20 and recorded in the RMD to be newly recorded after erasure.
In the above embodiment, the erase power coefficient table has coefficients up to the fourth time, but is not limited to this. For example, the erase power coefficient table may be up to the third time, and up to the fifth time. Also good. In addition, as the erase power coefficient table, values stored and recorded in advance in the control data zone in the LPP or lead-in are used, but the present invention is not limited to this. For a commercially available disc, a table obtained based on the measurement result of the disc type may be stored in advance in a nonvolatile memory in the optical disc apparatus 20 and the value may be used. Even in this case, if the disc type is newly marketed and there is no corresponding table in the non-volatile memory, it is stored in advance in the LPP of the disc or the control data zone in the lead-in. You may make it use the recorded value.
Further, the shape of the recording pulse may be a modified shape of FIG. 2 (this is the same in the following embodiments).

  In the present embodiment, the method of compensating the recording frequency dependency using the erase power coefficient table for the erase power has been described. As for the writing power, the change amount is small compared with the erasing power, but it is known that the writing power depends on the number of times of recording. As for the writing power, if the writing power at the time of recording in the data area is determined by multiplying the writing power for obtaining the target γ by a coefficient corresponding to the number of times of recording, further optimum recording is possible. Can be done. In that case, convenience is increased by recording data indicating the relationship between the number of times of recording and the coefficient multiplied by the writing power in the LPP or the control data zone at the time of manufacturing the disc.

  The present invention is not limited to the above embodiments and examples. For example, the recording medium to which the present invention is applied is also applicable to a rewritable optical disc in which three or more recording layers are laminated. be able to. The present invention also includes a computer program that causes a computer to execute each configuration of the optical disk device according to the above-described embodiments and examples. In this case, the computer program may be taken into the computer from a recording medium, or may be distributed via a communication network and downloaded to the computer (this is the same in the following embodiments).

In this embodiment, a target asymmetry table is used instead of the erase power coefficient table described in the first embodiment. In the second embodiment, the description of the same parts as those in the first embodiment is omitted.
As shown in FIG. 13, the asymmetry value β is dependent on the number of recordings. Therefore, the optimum erasing power can be obtained by changing the target asymmetry value βtarget to an appropriate value according to the number of times of recording.

The target asymmetry table used in this embodiment is stored and recorded as information in the control data zone in the LPP or lead-in when the disc is manufactured. When the single-sided dual layer DVD-RW disc 30 is loaded, the optical disc apparatus 20 acquires the target asymmetry table from the control data zone in the LPP or lead-in and stores it in the internal data memory 25.
FIG. 17A shows the target asymmetry table portion of the data stored in the LPP or control data zone. The byte positions N to N + 4 are the positions. The 8-bit data stored in each byte position has a value as shown in FIG. For example, the data “02h” stored in the byte position N indicates the value of the target asymmetry value βtarget, −0.11. The byte value N stores the target value βtarget1 of the first recording asymmetry value β, and the byte N + 1 stores the second target values βtarget2 and N + 2. The third target value βtarget3 is stored, and the target value target value βtarget4 of the fourth recording asymmetry value β is stored at the position of N + 3. The target value βtarget0 of the asymmetry value β for the fifth and subsequent recordings is stored at the position N + 4. As shown in FIG. 13, when recording is performed using the optimum erasing power and the number of times of recording is increased, β is small in the first recording, gradually increases to the second time and the third time, and from the fourth time onward. The value is almost constant. Therefore, when the small area where the OPC test writing is performed is the first recording, βtarget1 is set as the target value of β, and βtarget2 is set when the second recording is performed. If βtarget3 is the fourth recording, βtarget4 is used, and the fifth and subsequent times use a common value βtarget0.
The operation when performing OPC in the PCA area 311 of the first recording layer will be described with reference to the flowcharts of FIGS. The first half of the flowchart in FIG. 7 is the same as that in the first embodiment.

In steps S2 and S3, the past recording count of the small area used this time is obtained from the address of the small area and the usage count table of the PCA area.
In step S8, the erasing power Pe is changed to 10 levels, trial writing of a predetermined test signal is performed, and the portion recorded in step S9 is reproduced, and the data from the recording state detection circuit 28 is used for each erasing power in step S10. The asymmetry value β is calculated.

  In step S11, a target asymmetry value corresponding to the number of uses obtained in step S3 is obtained from the target asymmetry table. If the number of past recordings is 0, the target value βtarget1 of the asymmetry value β is set from the data at the byte N position. If the number of past recordings is 1, βtarget2 from the data at the position of byte N + 1, if it is twice, βtarget3 from the data at the position of byte N + 2, and if 3 times, βtarget4 is calculated from the data at the position of byte N + 3 β Target value. If it is four times or more, βtarget0 is set as the target value of the asymmetry value β from the data at the position of byte N + 4.

In step S12, the erase power at which the calculated asymmetry value β is close to the target value βtarget of β set according to the number of recordings is set as the optimum erase power.
In this embodiment, the erasing power coefficient is not multiplied after this.
Other parts are the same as those in the first embodiment.
As described above, in this embodiment, the number of trial writings performed in the PCA area of the first recording layer is recorded on the disk, and the value is read during the OPC operation. By determining the erasing power at the time of recording in the data area using the target asymmetry value corresponding to the number of times of recording, it is stable regardless of the number of times of recording in the small area in the PCA area. Optimal erasing power can be obtained.
Furthermore, by recording data that gives the relationship between the number of times of recording and the target asymmetry value at the time of manufacturing the disc, even if the disc is newly marketed, the data can be reproduced and used, thereby increasing convenience.
In the above embodiment, the target asymmetry table has βtarget1 to βtarget4 values for each number of times until the fourth recording, and the fifth and subsequent times have a common βtarget value. However, the present invention is limited to this. Instead, for example, up to the third time may be a value for each number of times, and the fourth and subsequent times may be a common value, or up to the fifth time may be a value for each number of times and the sixth and subsequent times may be a common value.
Further, as the target asymmetry table, a value stored and recorded in advance in the control data zone in the LPP or the lead-in is used, but the target asymmetry table is not limited to this. For a commercially available disc, a table obtained based on the measurement result of the disc type may be stored in advance in a nonvolatile memory in the optical disc apparatus 20 and the value may be used. Even in such a case, when the disc type is newly marketed and there is no corresponding table in the nonvolatile memory, it is stored and recorded as information in the control data zone in the LPP or lead-in of the disc in advance. A certain value may be used.
In the present embodiment, the method for compensating the recording frequency dependency for the erasing power using the target asymmetry table has been described. As for the writing power, the change amount is small compared with the erasing power, but it is known that the writing power depends on the number of times of recording. As for the writing power, if the value of the target γ is a value corresponding to the number of times of recording, a more optimal writing power can be obtained. In that case, convenience is increased by recording data indicating the relationship between the number of times of recording and the target γ in the LPP or the control data zone at the time of manufacturing the disc.

It is a block diagram showing an embodiment of the present invention, It is the figure which showed the change of the laser power at the time of recording / erasing to DVD-RW. It is a block diagram of the recording state detection circuit in one Example of this invention. It is the figure which showed the mode of the HF signal from which the direct-current component was cut. It is a graph which shows the relationship between the write power and modulation degree to single-sided dual layer DVD-RW. It is operation | movement explanatory drawing of one Example of this invention. It is a flowchart which shows operation | movement of one Example of this invention. It is a flowchart which shows operation | movement of one Example of this invention. It is the figure which showed the mode of the trial writing in one Example of this invention. 4 is a graph showing the relationship between the writing power to a single-sided dual layer DVD-RW and γ, β. It is a graph which shows the relationship between erasing power and γ, β to single-sided dual layer DVD-RW.

It is an example of an erasing power coefficient table. It is a graph which shows the relationship between the frequency | count of recording to single-sided double layer DVD-RW, and (beta). It is the figure which showed the content of the usage count table | surface part of RMD. It is the figure which showed the content of the usage count table | surface part of RMD. It is a flowchart which shows operation | movement of one Example of this invention. It is the figure which showed the content of the target asymmetry table | surface part of LPP or a control data zone. It is a structure figure of 1 layer DVD-R / RW. It is a structural diagram of the recording layer of DVD-R / RW. It is a structural diagram of single-sided dual-layer DVD-R / RW. It is a structure figure of the PCA area | region of single-sided double layer DVD-R / RW. It is a graph which shows the relationship between the frequency | count of recording to single-sided double layer DVD-RW, and an error rate. It is a graph which shows the relationship between the write power and error rate to single-sided dual layer DVD-RW, and the erase power and error rate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Host apparatus 20 Optical disk apparatus 21 System controller 22 Recording / reproducing circuit 23 Optical pick-up 24 Program memory 25 Data memory 26 Internal bus 27 Interface (IF)
28 Recording state detection circuit 30 Double-layer DVD-RW disc

Claims (17)

  It is a rewritable type optical disc, recording the test signal on the optical disc under various recording conditions, and reproducing the recorded test signal to detect a predetermined characteristic parameter for judging the quality of the recording state, An optical disc recording method for performing actual recording under a recording condition determined by calculating a recording condition so that the characteristic parameter is close to a predetermined set value and calculating the calculated recording condition and a parameter corresponding to the number of times of recording. An optical disc characterized in that a parameter corresponding to the number of recording times used is recorded in advance.   It is a rewritable type optical disc, recording the test signal on the optical disc under various recording conditions, and reproducing the recorded test signal to detect a predetermined characteristic parameter for judging the quality of the recording state, An optical disc in which a recording condition is determined so that the characteristic parameter is close to a predetermined setting value, and the setting value used in an optical disc recording method for performing actual recording under the recording condition is recorded in advance. An optical disc characterized in that the set value which varies depending on the number of times is recorded.   A recording method for recording on a rewritable optical disc, wherein a test signal is recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to determine whether the recording state is good or not Recording conditions are determined so that the characteristic parameter is close to a predetermined set value, and actual recording is performed under the recording conditions determined by calculating the recording conditions and parameters according to the number of times of recording. An optical disc recording method.   A recording device for recording on a rewritable optical disc, recording test signals on the optical disc under various recording conditions, and reproducing the recorded test signals to determine whether the recording state is good or not Recording conditions are determined so that the characteristic parameter is close to a predetermined set value, and actual recording is performed under the recording conditions determined by calculating the recording conditions and parameters according to the number of times of recording. An optical disk recording device for performing   A recording program for causing a recording means to execute a recording process on a rewritable optical disk, recording the test signal on the optical disk under various recording conditions, and reproducing the recorded test signal to determine whether the recording state is good or bad By detecting a predetermined characteristic parameter for determining the recording parameter, obtaining a recording condition so that the characteristic parameter is close to a predetermined set value, and calculating the obtained recording condition and a parameter corresponding to the number of times of recording. An optical disc recording program for causing a storage means to execute actual recording under a determined recording condition.   A recording method for recording on a rewritable optical disc, wherein a test signal is recorded on the optical disc under various recording conditions, and the recorded test signal is reproduced to determine whether the recording state is good or not The optical disk recording method is characterized in that a recording condition is determined so that the characteristic parameter becomes a value close to a predetermined set value corresponding to the number of recordings, and actual recording is performed under the recording condition.   A recording device for recording on a rewritable optical disc, recording test signals on the optical disc under various recording conditions, and reproducing the recorded test signals to determine whether the recording state is good or not The optical disk recording apparatus is characterized in that the recording condition is determined so that the characteristic parameter becomes a value close to a predetermined set value corresponding to the number of recordings, and actual recording is performed under the recording condition.   A recording program for causing a storage means to perform a recording process on a rewritable optical disk, recording a test signal on the optical disk under various recording conditions, and reproducing the recorded test signal to determine whether the recording state is good or bad A predetermined characteristic parameter for determining the recording condition is determined, a recording condition is determined so that the characteristic parameter is close to a predetermined set value corresponding to the number of times of recording, and actual recording is executed by the storage means under the recording condition. An optical disc recording program characterized by the above.   Write power for forming marks by changing the state of the recording film from the crystalline state to the amorphous state, erasing power for returning to the crystalline state from the amorphous state and erasing the old marks to form a mark non-forming section, and pulse division In a recording method of a rewritable optical disc in which new information is written while erasing old information recorded on the optical disc using a light beam in which the bottom power of the bottom of the divided pulse in the mark formation section by recording is set, First, the ratio of the erasing power and the writing power is fixed to an appropriate value, the writing power is changed in various ways, the test signal is recorded on the optical disc, the recorded test signal is reproduced, and the modulation degree of the reproduction signal is The write power is determined so that a value related to the modulation factor close to a preset value is obtained, and then the write power is determined. Is fixed to the determined value, the erasing power is changed in various ways, the test signal is recorded on the optical disc, the recorded test signal is reproduced, the value related to the asymmetry of the reproduced signal is detected, and The erasing power is determined so that a value related to asymmetry close to the set value is obtained, and actual recording is performed by controlling the power of the light beam by a combination of the determined values of the writing power and the erasing power. An optical disc recording method.   Write power for forming marks by changing the state of the recording film from the crystalline state to the amorphous state, erasing power for returning to the crystalline state from the amorphous state and erasing the old marks to form a mark non-forming section, and pulse division In a rewritable optical disc recording apparatus that writes new information while erasing old information recorded on the optical disc using a light beam in which the bottom power of the divided pulse in the mark formation section by recording is set, First, the ratio of the erasing power and the writing power is fixed to an appropriate value, the writing power is changed in various ways, the test signal is recorded on the optical disc, the recorded test signal is reproduced, and the modulation degree of the reproduction signal is The write power is determined so that a value related to the modulation factor close to a preset value is obtained, and then the write power is determined. Is fixed to the determined value, the erasing power is changed in various ways, the test signal is recorded on the optical disc, the recorded test signal is reproduced, the value related to the asymmetry of the reproduced signal is detected, and The erasing power is determined so that a value related to asymmetry close to the set value is obtained, and actual recording is performed by controlling the power of the light beam by a combination of the determined values of the writing power and the erasing power. An optical disc recording apparatus characterized by the above-mentioned.   Write power for forming marks by changing the state of the recording film from the crystalline state to the amorphous state, erasing power for returning to the crystalline state from the amorphous state and erasing the old marks to form a mark non-forming section, and pulse division Stores rewritable optical disc recording process in which new information is written while erasing old information recorded on the optical disc using a light beam with the bottom power set at the bottom of the divided pulse in the mark formation section by recording In the program to be executed by the means, first, the test signal is recorded on the optical disc by changing the write power in various ways by fixing the ratio of the erase power and the write power to an appropriate value, and the recorded test signal is reproduced. By detecting the value related to the modulation degree of the reproduction signal, a value related to the modulation degree close to the preset value is obtained. Next, the write power is fixed, the write power is fixed to the determined value, the erase power is changed variously, the test signal is recorded on the optical disc, the recorded test signal is reproduced, and the reproduction signal is asymmetry And determining the erasing power so that a value related to asymmetry close to a preset value is obtained, and the light beam power is determined by a combination of the determined values of the writing power and the erasing power. An optical disc recording program for controlling and causing a storage means to execute actual recording.  10. The recording method according to claim 9, wherein a write power determined so as to obtain a value related to a modulation degree close to the preset value and / or a value related to asymmetry close to the preset value are obtained. An optical disc recording method characterized in that a value obtained by multiplying an erasing power determined as described above by a coefficient corresponding to the number of times of recording is used as a writing power or / and an erasing power of actual recording.   11. The recording apparatus according to claim 10, wherein a write power determined so as to obtain a value related to a modulation degree close to the preset value and / or a value related to asymmetry close to the preset value are obtained. An optical disc recording apparatus characterized in that a value obtained by multiplying an erasing power determined as described above by a coefficient corresponding to the number of times of recording is used as a writing power or / and an erasing power for actual recording.   12. The recording program according to claim 11, wherein a write power determined so as to obtain a value related to a modulation degree close to the preset value and / or a value related to asymmetry close to the preset value are obtained. What is claimed is: 1. An optical disc recording program for causing a storage means to execute actual recording as a writing power or / and an erasing power obtained by multiplying an erasing power determined as described above by a coefficient corresponding to the number of times of recording.   13. The recording method according to claim 12, wherein the preset value at the time of determining the writing power so as to obtain a value related to the modulation degree close to the preset value is different from a value depending on the number of times of recording. And / or the optical disc recording method, wherein the preset value when determining the erasing power is set to a different value depending on the number of times of recording so that a value relating to asymmetry close to the preset value is obtained. .   14. The recording apparatus according to claim 13, wherein the preset value at the time of determining the writing power so as to obtain a value related to a modulation degree close to the preset value is different from a value depending on the number of times of recording. And / or the optical disc recording apparatus, wherein the preset value when determining the erasing power is set to a different value depending on the number of times of recording so that a value relating to asymmetry close to the preset value is obtained. . 15. The recording program according to claim 14, wherein the preset value at the time of determining the writing power so as to obtain a value related to a modulation degree close to the preset value is different from a value depending on the number of times of recording. And / or causing the storage unit to execute the preset value when determining the erasing power so as to obtain a value related to asymmetry close to the preset value, depending on the number of times of recording. An optical disc recording program characterized by the above.

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