JP4387366B2 - Optical recording apparatus, optical recording method, optical recording apparatus control program, and computer-readable recording medium recording the same - Google Patents

Description

  The present invention relates to an optical recording apparatus and an optical recording method for recording information on a recording medium, and in particular, an optical recording apparatus, an optical recording method, and an optical recording capable of stably optimizing recording conditions for a plurality of tracks having different characteristics. The present invention relates to an apparatus control program and a computer-readable recording medium on which the control program is recorded.

  In recent years, research on increasing the density of optical disks has been increasingly active. In particular, if the recording conditions such as the recording light quantity of the light beam applied to the optical disc and the recording magnetic field strength of the externally applied magnetic field applied to the magneto-optical disc change, the size of the recording mark changes, so that uniform recording can be performed. Therefore, there is a problem that high-density recording is difficult.

  Also, optical discs have different recording sensitivities due to manufacturing variations. That is, from the viewpoint of the optical recording apparatus, the tendency of the optimum recording condition for forming a recording mark with an appropriate shape and the optimum recording condition depending on the radial position differs depending on the individual optical disc. Furthermore, the recording sensitivity is not only unique to the optical disc, but also changes due to changes in environmental temperature. Therefore, in the optical recording apparatus, it is necessary to check the optimum recording condition for each loaded optical disk and for each changing environmental temperature. Actually, these optimum recording conditions are obtained by trial writing in a plurality of test areas at different radial positions.

  On the other hand, as a method for further increasing the capacity of an optical disc, there is land groove recording. Conventional optical disk recording is performed only on one of the land and the groove. On the other hand, land / groove recording is a method of improving recording density by using both lands and grooves as recording tracks.

  Since the land / groove recording medium is formed on the land and the groove simultaneously, it is considered that there is almost no difference in the characteristics of the recording layer. However, due to variations in the ratio between the land width and the groove width, the difference in the thermal conductivity characteristics from land to groove, and from groove to land, the optimum recording conditions may differ between adjacent lands and grooves. There was a problem that there was.

  The following solutions have been proposed for this problem.

  First, Patent Document 1 discloses a recording power setting method in which trial writing is performed on both a land and a groove in a test writing area provided on both the land and the groove, and respective appropriate recording powers are set. It is disclosed.

Further, Patent Document 2 provides an optical information recording / reproducing method in which identifiers (light intensity, track pitch, groove width / depth, etc.) indicating recording conditions are provided, and the recording conditions for the land and groove are set independently. Is disclosed. In particular, in order to shorten the time or simplify the circuit, it is disclosed that the correlation between the land and the groove is obtained in advance, one recording condition is obtained by trial writing, and the other recording condition is obtained based on the correlation. Has been.
Japanese Patent Laid-Open No. 9-16965 (Publication date: January 17, 1997) Japanese Patent No. 3024120 (Publication date: January 21, 2000)

  However, in the method described in Patent Document 1, the optical recording apparatus performs recording and reproduction to be performed under the user's instruction while trial writing is performed on both the land and the groove and the optimum recording conditions are obtained. The operation is interrupted for a certain time. Therefore, if such interruptions occur frequently, a decrease in data transfer rate, that is, a decrease in performance of the optical recording apparatus cannot be avoided.

  Further, in the method described in Patent Document 2, since the track for which test writing has been performed has a higher recording light amount setting accuracy than the track obtained based on the correlation, the recording light amount setting is performed a plurality of times. There may be a bias in the accuracy of light quantity setting.

  The present invention has been made to solve the above-described problems. The purpose of the present invention is to accurately optimize the optimum recording conditions in a short time even if the characteristics are different among a plurality of tracks such as lands and grooves. An object of the present invention is to provide an optical recording apparatus and an optical recording method which can be set and recorded well. Further, the object of the present invention includes providing a control program for realizing the optical recording apparatus and a computer-readable recording medium on which the control program is recorded.

The optical recording apparatus of the present invention, in order to solve the above problems, there is provided an optical recording apparatus for recording on an optical recording medium having a plurality of recording layers having different characteristics, perform test writing at least one recording layer, the recording a recording condition determining means for determining a recording condition for recording the layer, based on the recording condition determined in the recording condition determination means, by performing a calculation in accordance with the operation information, recording for recording the rest of the recording layer a recording condition calculating means for determining a condition, a changeover means for changing cutting a recording layer for performing the test writing, as well as providing the calculation information in the recording condition calculating means, the switching of the recording layer by the upper Symbol changeover means Each has a calculation information management means for correcting the calculation information based on the result of the test writing before switching and the result of the test writing after switching.

The optical recording method of the present invention is an optical recording method for recording on an optical recording medium having a plurality of recording layers having different characteristics in order to solve the above-described problems, and performs test writing with at least one recording layer , Based on the recording condition determination process for determining the recording condition for recording on the recording layer and the recording condition determined in the recording condition determination process, the calculation is performed according to the calculation information, and the recording is performed on the remaining recording layers. a recording condition calculation process of determining the recording conditions, the recording layer changeover process changing off for performing the test writing for each switching of the recording layer by the upper Symbol changeover process, the trial writing before switching results and after switching And a calculation information correction process for correcting the calculation information based on the result of the trial writing.

With the above configuration and method, in the optical recording medium having a plurality of recording layers , the recording conditions of each recording layer having different characteristics are determined by performing trial writing on at least one recording layer (first recording layer ), The remaining recording layer (second recording layer ) is determined by calculation according to the calculation information based on the result of trial writing of the first recording layer .

Therefore, since the recording condition of at least one recording layer can be set by calculation for a plurality of recording layers having different recording sensitivities, it is possible to shorten the time for setting the recording condition. Therefore, it is possible to shorten the time for the optical recording apparatus to interrupt the recording or reproducing operation to be performed under the instruction of the user in order to obtain the recording condition of the recording layer . Therefore, it is possible to avoid a decrease in performance of the optical recording apparatus such as a decrease in data transfer rate.

Here, it is considered that the recording condition of the recording layer calculated according to the calculation information may be less accurate than the recording condition of the recording layer set by actually performing trial writing.

Therefore, in the above configuration and method, when the recording conditions are set a plurality of times, the recording layer to which the trial writing is performed is switched, and when the recording layer is switched, the result of the trial writing before switching and the test writing after switching The calculation information is corrected based on the result.

That is, when the trial recording is performed on the first recording layer in the previous recording condition setting and the recording condition of the second recording layer is obtained by calculation, the current recording condition setting in which the recording layer is switched is The recording condition of the second recording layer is determined by trial writing, and the calculation information for obtaining the recording condition of the recording layer is corrected based on the result, and the previous second recording is added to the corrected calculation information. The result of the trial writing of the layer is applied to determine the previous recording condition of the first recording layer by calculation.

Therefore, so as not to cause a bias in the number of times and recording environment was carried out test writing in the respective recording layers of the optical recording medium, by switching the recording layer to perform test writing, it is possible to correct the calculation information. Accordingly, by bringing the accuracy of the recording conditions by the calculation closer to the recording conditions by the trial writing, it is possible to reduce the deviation of the accuracy of the recording conditions set in each recording layer .

Furthermore, the optical recording apparatus of the present invention is characterized in that the calculation information management means includes a creation means for performing trial writing on the recording layer to create the calculation information.

With the above configuration, the optical recording apparatus further performs trial writing on the recording layer by the creating unit, and creates calculation information for obtaining recording conditions of the recording layer on which the trial writing has been performed based on the result. Can do.

  Therefore, when the calculation information is not recorded in advance on the optical recording apparatus or the optical recording medium, it is possible to create the calculation information by performing trial writing and set the recording conditions.

  Furthermore, the optical recording apparatus of the present invention is characterized in that the calculation information management means includes a recording means for writing the calculation information to the optical recording medium.

  With the above configuration, the optical recording apparatus can further record the latest calculation information in, for example, a test area of the optical recording medium by the recording means.

  Therefore, calculation information for obtaining different recording conditions for each optical recording medium can be recorded on each recording medium. Therefore, when the next information is recorded, the calculation information can be read and used, so that the recording condition can be set with high accuracy. Further, since the calculation information is recorded on the recording medium, the same calculation information can be used in different optical recording apparatuses.

  Furthermore, the optical recording apparatus of the present invention is characterized in that the calculation information management means includes an acquisition means for reading the calculation information from the optical recording medium.

  With the configuration described above, the optical recording apparatus can further acquire calculation information recorded in, for example, a test area of the optical recording medium by the acquisition unit.

Therefore, calculation information for obtaining different recording conditions for each optical recording medium can be read from each optical recording medium. Therefore, when recording information on the optical recording medium, the recording conditions can be set with high accuracy. In addition, since the calculation information is recorded on the recording medium, the same calculation information can be used in an optical recording apparatus different from the optical recording apparatus that recorded the calculation information .

  The control program of the present invention is a computer program that causes a computer to function as each of the means described above.

  With the above configuration, the optical recording apparatus can be realized by realizing each unit of the optical recording apparatus with a computer. Therefore, even if the characteristics of the plurality of tracks are different, the optical recording apparatus can set and record optimum recording conditions in a short time with high accuracy.

  A computer-readable recording medium on which the control program of the present invention is recorded is a computer-readable recording medium on which a control program for operating the optical recording apparatus by causing the above-described means to be realized by a computer.

  With the above configuration, the optical recording apparatus can be realized on a computer by a control program read from the recording medium.

As described above, the optical recording apparatus of the present invention provides an optical recording apparatus for recording on an optical recording medium having a plurality of recording layers having different characteristics, perform test writing at least one recording layer, is recorded on the recording layer Recording condition determining means for determining the recording conditions at the time of recording, and based on the recording conditions determined by the recording condition determining means, calculation is performed according to the calculation information to determine the recording conditions for recording on the remaining recording layers a recording condition calculating means, and changeover means for changing cutting a recording layer for performing the test writing, as well as providing the calculation information in the recording condition calculating means, for each switching of the recording layer by the upper Symbol changeover means, switching The information processing unit includes a calculation information management unit that corrects the calculation information based on the result of the previous test writing and the result of the test write after switching.

Further, the optical recording method of the present invention is to provide an optical recording method for recording on an optical recording medium having a plurality of recording layers having different characteristics, perform test writing at least one recording layer, the recording for recording on the recording layer Recording condition determining process for determining the condition and recording condition calculating process for determining the recording condition for performing recording according to the information for calculation based on the calculation information based on the recording condition determined in the recording condition determining process. When a conversion example Ru changeover process off recording layer for performing the test writing for each switching of the recording layer by the upper Symbol changeover process, based on the result of the test writing after the result and switching test writing before switching And a calculation information correction process for correcting the calculation information.

Therefore, since the recording conditions of at least one recording layer can be set by calculation for a plurality of recording layers having different recording sensitivities, the time for setting the recording conditions can be shortened. Therefore, it is possible to shorten the time for the optical recording apparatus to interrupt the recording or reproducing operation to be performed under the instruction of the user in order to obtain the recording condition of the recording layer . Therefore, it is possible to avoid the performance degradation of the optical recording apparatus such as the data transfer rate.

In addition, so as not to cause a bias in the number of times and recording environment was carried out test writing in the respective recording layers of the optical recording medium, by switching the recording layer to perform test writing, it is possible to correct the calculation information . Therefore, by bringing the accuracy of the recording condition by the calculation closer to the recording condition by the trial writing, it is possible to reduce the deviation of the accuracy of the recording condition set in each recording layer .

  One embodiment of the present invention will be described below with reference to FIGS.

  In this embodiment, magneto-optical recording will be described as an example. For convenience of explanation, the optimization of the recording conditions will be described by taking the optimization of the recording light quantity in the magnetic field modulation recording as an example.

  FIG. 2 is a block diagram showing an outline of the configuration of the optical recording apparatus 1 according to the present embodiment.

  The magneto-optical disk D loaded in the optical recording apparatus 1 uses a substrate with a guide groove having a land as a convex portion and a groove as a guide groove, and uses both the land and the groove as a recording / reproducing track. It is a recording medium.

  In the optical recording apparatus 1, the control unit 20 moves the pickup 13 to the track (land or groove) of the rotating magneto-optical disk D via the pickup driving circuit 14. The pickup 13 is provided with an optical head 11 and a magnetic head 12. Then, the control unit 20 sets the recording light quantity via the laser drive circuit 15 and irradiates the recording part of the magneto-optical disk D with the recording head from the optical head 11, and at the same time, the control unit 20 performs the magnetic head drive circuit 16. Information is recorded on the track of the magneto-optical disk D by generating a recording magnetic field from the magnetic head 12.

  In the optical recording apparatus 1, the control unit 20 moves the pickup 13 to the recording part of the magneto-optical disk D via the pickup driving circuit 14. Then, the control unit 20 irradiates the magneto-optical disk D with a reproducing laser beam from the optical head 11 via the laser driving circuit 15. The reflected light detected by the optical head 11 is converted into a reproduction signal g by the reproduction circuit 17 and input to the control unit 20. Thereby, the optical recording apparatus 1 reproduces the information recorded on the track of the magneto-optical disk D.

  Here, the optical recording apparatus 1 is particularly provided with a memory 31 and a sensor 32. The memory 31 is a storage device that can read and write operation information (described later) as data a from the control unit 20. The sensor 32 is a sensor for detecting a change in the recording environment on the magneto-optical disk D. For example, the sensor 32 is a temperature sensor for detecting the temperature of the recording part of the magneto-optical disk D. And the detected result is output to the control part 20 as the detection signal b.

  As described above, the optical recording apparatus 1 records information on the magneto-optical disk D having two tracks having different characteristics, that is, lands and grooves. The optical recording apparatus 1 sets land and groove recording conditions based on test writing and calculation information in the test area Db (FIG. 7) of the magneto-optical disk D, respectively. Information is recorded on each track according to the recording conditions. The recording operation to the user area Da (FIG. 7) after the recording conditions are set in the optical recording apparatus 1 is the same as a generally known operation.

  Note that the position of the test area Db is not limited to the position shown in FIG. 7, and may be present at an arbitrary radial position of the magneto-optical disk D, or a plurality of positions may exist.

  Next, the configuration and operation procedure for setting the recording conditions in the optical recording apparatus 1 will be described in detail.

  FIG. 1 is a block diagram showing a configuration provided in the control unit 20 for setting recording conditions of the optical recording apparatus 1.

  The control unit 20 includes a recording condition setting control unit 21, a track switching unit (track switching unit) 22, a recording condition determination unit (recording condition determination unit) 23, a recording condition calculation unit (recording condition calculation unit) 24, and calculation information. A management unit (calculation information management means) 25 is provided.

  The recording condition setting control unit 21 detects a predetermined change in the recording environment from the detection signal b of the sensor 32 not only when the magneto-optical disk D is loaded in the optical recording apparatus 1 but also during an information recording operation. The recording condition setting operation is started as appropriate when a predetermined time has elapsed since the last trial writing.

  The track switching unit 22 selects a track whose recording condition is determined by trial writing by the recording condition determining unit 23. The track switching unit 22 instructs the calculation information management unit 25 to update the calculation information when it is determined to switch the track for trial writing.

  Here, since the switching of the track averages the accuracy of the recording conditions set for each track, the number of trial writings performed on each track of the magneto-optical disk D and the recording environment are not biased. Do. For example, a track on which trial writing is performed may be selected according to a track used when recording in the user area Da (FIG. 7). Specifically, in the recording condition setting before recording on the land of the user area Da, the land recording condition is set by performing trial writing on the land of the test area Db, and the recording condition of the groove is set by calculation. Also good.

  The recording condition determination unit 23 performs test writing on the track selected by the track switching unit 22 (hereinafter referred to as “selected track”) (first track), and determines the recording condition of the selected track.

  The recording condition calculation unit 24 selects a track determined by the recording condition determination unit 23 for a track that has not been selected by the track switching unit 22 (hereinafter referred to as “non-selected track”) (second track). An operation is performed based on the recording condition of the track to determine the recording condition of the non-selected track.

  The calculation information management unit 25 manages calculation information used when the recording condition calculation unit 24 calculates the recording condition of the non-selected track, and provides it to the recording condition calculation unit 24.

  Here, in the setting of the recording light quantity, the calculation information is managed in the form of a predetermined constant or information on the reference recording light quantity for each of the land and the groove. The calculation information is created based on the correlation between the two tracks. The calculation information may be recorded in advance in the test area Db of the magneto-optical disk D in advance in the form of a predetermined constant such as the ratio or difference between the recording light amounts of lands and grooves, or may be pre-recorded. The calculation information management unit 25 may create calculation information based on the reference recording light quantity information for each land and groove recorded on D. Specifically, when the reference recording light amounts for the land and the groove are Pw0 (L) and Pw0 (G), the ratio α = Pw0 (G) / Pw0 (L) or the difference ΔPw = Pw0 (L) ) -Pw0 (G) or the like is created as calculation information.

  Hereinafter, in the present embodiment, description will be given using the recording light ratio α of land and groove as calculation information. The calculation information is described as being recorded in the test area Db, but the area for recording the calculation information may be anywhere on the magneto-optical disk D. Note that the calculation information is temporarily stored in the memory 31.

  Therefore, the calculation information management unit 25 particularly has the following functions. (1) The calculation information recorded in advance in the test area Db of the magneto-optical disk D is read (acquisition unit (acquisition means) 25a). (2) The calculation information is created based on the result of trial writing on the selected track by the recording condition determining unit 23 or the recording condition determined from the result (creating unit (creating unit) 25b). (3) When the track to be trial-written is switched according to the instruction from the track switching unit 22, the recording condition is recorded by the trial writing immediately before switching or the trial writing from several times before and the recording condition by the trial writing after switching. Based on this, the calculation information that defines the calculation formula used for the calculation of the recording condition is corrected (correction unit 25c). (4) The calculation information in the memory 31 is updated with the newly generated calculation information (update unit 25d). (5) The latest calculation information stored in the memory 31 is recorded in the test area Db of the magneto-optical disk D so as to be readable by an optical recording apparatus other than the optical recording apparatus 1 (recording section (recording means) 25e). ).

  FIG. 3 is a flowchart for explaining a specific operation of recording light amount setting in the optical recording apparatus 1. The basic operation for optimizing the recording light amount will be described below with reference to FIG.

  First, when the magneto-optical disk D is loaded in the optical recording apparatus 1, the calculation information management unit 25 controls to access an area in which the calculation information in the test area Db is recorded (S1). Information is read and stored in the memory 31 (S2).

  Next, under the control of the recording condition determination unit 23, the optimum recording light amount of one track is determined by trial writing. Specifically, first, the test area Db on the magneto-optical disk D is accessed (S3). Subsequently, the track switching unit 22 selects a track (selected track) for trial writing from the land and the groove (S4). Here, it is assumed that a land is selected. Then, the recording condition determination unit 23 performs test writing on the track (land) selected in step S4 (S5), and determines the optimum recording light amount Pw (L) in the land Tr (L) (S6).

  Next, under the control of the recording condition calculation unit 24, the optimum recording light amount of the other track is determined by calculation. Specifically, first, the calculation information management unit 25 reads calculation information in the memory 31 (S7). Then, the recording condition calculation unit 24 acquires the calculation information and the optimum recording light amount Pw (L) in the land Tr (L) obtained in step S6 via the calculation information management unit 25, and uses them. An arithmetic process is performed (S8), and the optimum recording light amount Pw (G) in the groove Tr (G) is determined (S9). In other words, the optimum recording light amount Pw (G) in the groove Tr (G) is calculated by using the coefficient α which is the calculation information and the optimum recording light amount Pw (L) in the land Tr (L), Pw (G) = α × Pw. (L).

  Here, the operation of the optical recording apparatus 1 when performing the above-described processing shown in the flowchart of FIG. 3 will be described with reference to FIG.

  First, when the magneto-optical disk D is loaded in the optical recording apparatus 1, the control unit 20 sends a control command c 1 to the pickup drive circuit 14. Based on this control command c1, the pickup driving circuit 14 moves the pickup 13 to the area on the magneto-optical disk D where the information for calculation is recorded. The control unit 20 sends a control command c3 to the laser drive circuit 15 and irradiates the magneto-optical disk D with a reproduction laser beam from the optical head 11 in the pickup 13. Then, after the reflected light is detected by the optical head 11 and converted into an electric signal f, the reproduction signal g generated by the reproduction circuit 17 is input to the control unit 20. The control unit 20 stores the reproduction signal g in the memory 31 as calculation information.

  Next, the control unit 20 sends a control command c1 to the pickup drive circuit 14 to move the pickup 13 to the test area. Subsequently, the control unit 20 sends a control command c3 to the laser drive circuit 15 to set the recording light quantity, and the recording current beam from the optical head 11 is magneto-optically driven by the drive current e output from the laser drive circuit 15. Irradiate disk D. At the same time, the control unit 20 sends a control command c2 to the magnetic head drive circuit 16 to generate a drive current d. A recording magnetic field is generated from the magnetic head 12 by the drive current d, and a test writing pattern is recorded on the magneto-optical disk D. Here, the control unit 20 (recording condition determination unit 23) controls the control command c3 to sequentially change the recording light amount within the range from a small light amount to a large light amount, and at the same time, by controlling the control command c1. A test writing pattern is recorded while moving the optical head 11 to a selected track (here, a land).

  Next, the control unit 20 sends a control command c3 to the laser drive circuit 15, and irradiates the magneto-optical disk D with a laser beam for reproduction from the optical head 11. The optical head 11 converts the reflected light from the magneto-optical disk D into an electric signal f, and then gives it to the reproducing circuit 17. The reproduction circuit 17 generates a reproduction signal g of the recorded test writing pattern and outputs it to the control unit 20.

  Then, the control unit 20 (recording condition determining unit 23) sequentially stores the reproduction signal g of the test writing pattern corresponding to each recording light amount, and sets the recording light amount satisfying the predetermined condition to the optimum recording light amount Pw ( L). Here, a method for detecting the optimum recording light amount by trial writing can be arbitrarily selected. For example, the recording light amount that minimizes the error or jitter may be detected, or the recording light amount that causes the signal amplitude to be a predetermined value may be detected.

  Subsequently, the control unit 20 (recording condition calculation unit 24) adds the calculation to the land optimum recording light amount Pw (L) obtained above according to the calculation formula determined by the calculation information read from the memory 31. The recording light amount Pw (G) of the groove is determined.

  In the above description, first, the optimum recording light amount Pw (L) of the land Tr (L) is determined by the trial writing operation (S5), and then the optimum recording light amount Pw (G) of the groove Tr (G) is determined by calculation. However, as a matter of course, after the optimum recording light amount Pw (G) of the groove Tr (G) is first determined by the trial writing operation, the optimum recording light amount Pw (L) of the land Tr (L) is set by calculation. Also good. The calculation at this time can be expressed by Pw (L) = (1 / α) × Pw (G).

  As described above, in the optical recording apparatus 1, even when the recording sensitivities of the land and the groove are different, the recording condition of one track is determined by performing trial writing, and the recording condition of the other track is determined by one track. Therefore, the recording condition setting time can be shortened. Therefore, it is possible to avoid a decrease in the data transfer rate due to the interruption for setting the recording condition.

  Here, in general, the set recording conditions are set with higher accuracy in the track recording conditions set by actually performing the trial writing than in the track recording conditions calculated in accordance with the calculation information. it is conceivable that.

  Therefore, in the optical recording apparatus 1, when the recording condition is set a plurality of times, for example, a land is first selected at least once as a track for trial writing, and the recording light amount of the groove is set by calculation. Next, a groove is selected at least once as a track for test writing, and the land recording light quantity is set by calculation.

  As a result, the optical recording apparatus 1 can shorten the recording condition setting time and correct the calculation information for determining the calculation formula to reduce the deviation in accuracy of the recording conditions set for each track. Can do.

  Hereinafter, the above-described track switching will be described with reference to the flowchart of FIG.

  In the optical recording apparatus 1, the recording condition is set when a predetermined change is detected in the environmental temperature, or when the magneto-optical disk D is loaded in the optical recording apparatus 1, or the previous test writing operation. It is also performed when a predetermined time has passed since the start. Since the calculation information is stored in the memory 31 after the magneto-optical disk D is loaded in the optical recording apparatus 1, steps S1 and S2 in FIG. 3 can be omitted.

  As shown in FIG. 4, when the recording condition setting control unit 21 starts the recording condition setting process based on the detection signal b or the like of the sensor 32, first, the track switching unit 22 determines whether or not it is necessary to switch the track for trial writing. (S10).

  Here, when the track switching unit 22 determines that the track is switched (YES), the calculation information management unit 25 performs the trial writing immediately before the selected track before switching or the trial writing from several times before to immediately before. The recording condition is read from the memory 31, and the recording condition calculation unit 24 determines the recording condition of the track (S11). For example, the recording condition by trial writing may be used as it is immediately before the selected track before switching. Alternatively, a predicted recording condition may be created by calculation using a history of recording conditions by trial writing from several times to immediately before. Specifically, based on the history of recording conditions by trial writing, interpolation such as linear interpolation or secondary interpolation, or an average value may be obtained. Further, when recording the recording condition by trial writing in the memory 31, the detection signal of the sensor 32 at that time is stored in association with the recording condition, and when reading the recording condition, a value close to the detection signal of the current sensor 32 is stored. These detection signals may be searched from the detection signals recorded in the memory 31 and the recording conditions corresponding to the obtained detection signals may be read and used.

  Thereafter, the track switching unit 22 selects a new track on which trial writing is performed (S12). Subsequently, the recording condition determination unit 23 performs trial writing of the selected track (S13), and determines the recording condition of the selected track (S14). Then, using the recording conditions determined in steps S11 and S14, the calculation information is corrected (S15) and stored in the memory 31 (S16).

  On the other hand, when the track switching unit 22 determines not to switch tracks (NO), it is the same as steps S3 to S9 in FIG. That is, the recording condition determination unit 23 performs trial writing of the selected track (S17), and determines the recording condition of the selected track (S18). Thereafter, the recording condition calculation unit 24 calculates the recording condition for the non-selected track according to the calculation formula defined by the calculation information based on the recording condition for the selected track (S19), and determines the recording condition for the non-selected track (S19). S20).

  Here, in the recording light quantity setting method shown in FIG. 3, the calculation information is recorded in advance on the magneto-optical disk D in the form of a predetermined constant or the reference recording light quantity information for each of the land and the groove. Yes.

  On the other hand, when the calculation information is not recorded on the magneto-optical disk D in advance, the optical recording apparatus 1 creates the calculation information by performing trial writing.

  FIG. 5 is a flowchart showing a specific operation for creating calculation information by performing trial writing.

  First, the test area Db on the magneto-optical disk D is accessed under the control of the recording condition determining unit 23 (S21). Next, test writing is performed on the land (S22), and the optimum recording light amount Pw (L) in the land Tr (L) is determined (S23). Subsequently, trial writing is performed on the groove (S24), and the optimum recording light amount Pw (G) in the groove Tr (G) is determined (S25). Then, the calculation information management unit 25 creates calculation information based on the optimum recording light amounts Pw (L) and Pw (G) (S26). Finally, the calculation information created in step S26 is stored in the memory 31 (S27).

  Of course, the optimum recording light amount Pw (L) in the land Tr (L) may be determined after the optimum recording light amount Pw (G) in the groove Tr (G) is determined by the trial writing operation.

  As described above, the optical recording apparatus 1 can create the calculation information by performing trial writing and store it in the memory 31 when the calculation information is not previously recorded on the magneto-optical disk D. .

  Therefore, when the recording conditions are set next time, since the calculation information is already stored in the memory 31, the recording conditions of the land and groove tracks are set by the operation in which steps S1 and S2 in FIG. 3 are omitted. Can do.

  Further, the optical recording apparatus 1 performs trial writing at least once for both the land and the groove, corrects the arithmetic expression to create arithmetic information, and updates the arithmetic information stored in the memory 31. can do. The flowchart of this operation is the same as FIG.

  Therefore, in the optical recording apparatus 1, test writing is performed at least once for both the land and the groove, and the calculation formula is corrected to further increase the accuracy of the calculation in the recording condition calculation unit 24, thereby setting the recording condition. It becomes possible to decide.

  Further, the optical recording apparatus 1 can record calculation information used for calculation of recording conditions on the magneto-optical disk D.

  FIG. 6 is a flowchart for explaining a specific operation for recording the calculation information stored in the memory 31 on the magneto-optical disk D.

  First, under the control of the recording condition determination unit 23, test writing is performed at least once for both the land and the groove, the calculation formula is corrected to regenerate the calculation information, and the calculation information in the memory 31 is stored. As a result of the update, the latest calculation information is stored in the memory 31. Therefore, the calculation information is read from the memory 31 (S31) and recorded in the test area Db of the magneto-optical disk D (S32).

  As described above, the optical recording apparatus 1 can store the information indicating the latest land and groove characteristic difference on the magneto-optical disk D by recording the updated calculation information on the magneto-optical disk D. . Therefore, not only in the same optical recording apparatus 1 but also in different optical recording apparatuses, when information is recorded with the magneto-optical disk D loaded, the latest calculation information indicating the difference in characteristics between the land and the groove is used. Recording conditions can be set.

  As described above, the optical recording apparatus and the optical recording method according to the present embodiment perform the land and groove recording operations when the land and groove optimum recording conditions for the land and groove having different characteristics are determined a plurality of times. Select one track of the groove as a track to determine the optimum recording condition by trial writing at least once or multiple times, determine the optimum recording condition by trial writing, and record the optimum recording condition by trial writing. An optimum recording condition is determined by adding a calculation to the condition according to the calculation information.

  This makes it possible to set appropriate recording conditions for tracks with different recording sensitivities and for one track by trial writing, and for the other track by calculation, thereby shortening the time for setting recording conditions. it can. Therefore, when the optimum recording conditions are different between the land and the groove, the time during which the optical recording apparatus interrupts the recording and reproduction operations to be performed under the user's instruction while obtaining the optimum recording conditions for the land and the groove. Can be shortened. Accordingly, it is possible to avoid a decrease in performance of the optical recording apparatus such as a decrease in data transfer rate.

  In the optical recording apparatus and optical recording method described above, in the next operation, the other track is selected as a track for determining the optimum recording condition by trial writing, and the optimum recording condition is determined by trial writing for the other track. Based on the optimum recording condition of one track determined in the previous trial writing, the calculation information for calculating the optimum recording condition of one track was corrected and obtained by the trial writing of the other track. An optimum recording condition for one of the tracks is determined by performing a calculation according to the corrected calculation information for the optimum recording condition.

  As described above, by switching the track on which the test writing is performed, when the recording condition setting is performed a plurality of times, it is possible to prevent the writing of the test writing or the calculation on one track from being biased and the recording condition setting accuracy from being biased. Further, every time the track is switched, the calculation information is corrected based on the result of the previous trial writing, so that it is possible to set the optimum recording condition by increasing the accuracy of the recording condition by the calculation.

  In the above optical recording apparatus and optical recording method, when the operation for determining the optimum recording conditions for lands and grooves having different characteristics is performed a plurality of times, at least once or every plurality of times, both in the land and the groove. Each optimum recording condition is determined by trial writing, and information for calculating the optimum recording condition is updated based on the optimum recording condition.

  Thereby, it is possible to set the optimum recording condition by further increasing the accuracy of the recording condition by calculation.

  Therefore, the above optical recording apparatus and optical recording method are useful as a technique for performing a test write operation of an optical disc for performing land groove recording in a short time. Moreover, the conditions of the light beam power can be set at high speed and with high accuracy even in future high-density recording.

  In addition, this Embodiment does not limit the scope of the present invention, and various modifications can be made within the scope of the present invention.

  For example, the description has been given of the case where the optimum recording light amount is obtained for the land track Tr (L) and the groove track Tr (G) among the plurality of tracks Tr of the magneto-optical recording medium. It can be obtained similarly. Therefore, it is desirable to set the recording light quantity at least once for each track. However, if the recording light quantity is set at least once for each land and groove, it is not always necessary to set the recording light quantity for every track. May be performed once.

  This embodiment can also be applied to the case where the recording magnetic field strength is optimized as the recording condition to be set. Further, the magnetic field modulation recording has been described as an example, but the recording light quantity can be set with high sensitivity also in the optical modulation recording. Furthermore, the present invention is not limited to magneto-optical recording, and can be similarly performed on other optical recording media such as phase change recording.

  In particular, the method described in the present embodiment is suitable for an optical recording medium having a plurality of recording area groups having different characteristics, including land groove recording and multilayer recording. Multi-layer recording is a method for increasing the capacity of an optical disc. However, since the recording layer has a different recording layer characteristic, that is, the recording sensitivity differs for each recording layer, the optimum recording conditions differ. Therefore, by applying the above method, it is possible to set the recording light amount with high sensitivity for each recording layer even in multilayer recording.

  Specifically, when the optical recording method is applied to recording on an optical recording medium having two recording layers, in the above description, the land and the groove may be read as one of the two recording layers, respectively. .

  Further, when the optical recording method is applied to recording on an optical recording medium having three or more recording layers, trial writing is performed on a plurality of recording layers in order to set recording conditions for one recording layer. It can also be done.

  In this case, the optimum recording condition of one of the recording layers on which the test writing has been performed is selected, and calculation is performed on the remaining recording layers on which the test writing has not been performed according to the calculation information based on the recording conditions. The optimum recording conditions for each recording layer may be determined. In addition, the optimum recording conditions for some or all of the recording layers that have been test-written are selected, and the remaining recording layers that have not been trial-written are selected based on these optimum recording conditions. If the calculation is performed according to the calculation information, a plurality of recording conditions can be obtained for each recording layer. The optimum recording conditions for each recording layer may be determined by performing arithmetic operations such as averaging and weighting based on the position of each layer (distance between layers) on the plurality of recording conditions. Further, even when trial writing is performed on a plurality of recording layers, the calculation information between these recording layers can be updated based on the optimum recording conditions obtained by the trial writing.

  The optical recording apparatus 1 includes a CPU (central processing unit) that executes instructions of a program (control program / recording condition determination program) that realizes each function of the control unit 20, and a ROM (read only memory) that stores the program. ), A RAM (random access memory) for expanding the program, and a storage device (recording medium) such as a memory for storing the program and various data.

  An object of the present invention is to provide a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program, which is software that realizes the functions described above, is recorded so as to be readable by a computer. This can also be achieved by supplying the apparatus 1 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU). In this case, the program code itself read from the recording medium realizes the above-described function, and the recording medium recording the program code constitutes the present invention.

  Finally, the optical recording method according to the present invention is an optical recording method for recording information on an optical recording medium including a plurality of recording area groups (tracks) having different characteristics, and an operation for determining optimum recording conditions for each recording area group. At least one recording area group was selected at least once or multiple times as a recording area group for determining optimum recording conditions by trial writing, and the remaining recording area groups were obtained by trial writing. In the step of determining the optimum recording condition by adding an operation to the optimum recording condition, and in the next operation, as a recording area group for determining the optimum recording condition by test writing, from among the remaining recording area group, At least one recording area group is selected, and the other recording area group is determined by calculating the optimum recording condition by performing an operation on the optimum recording condition obtained by trial writing. Or a method comprising a step.

  In the optical recording method, information for calculating the optimum recording condition may be recorded in advance on the optical recording medium.

  The optical recording method includes a step of determining each optimum recording condition by trial writing in each recording area group and creating information for calculating the optimum recording condition based on the optimum recording condition. May be.

  In the above optical recording method, when the operation for determining the optimum recording condition for each recording area group is performed a plurality of times, the optimum recording condition is determined by trial writing in each recording area group at least once or every plurality of times. A step of updating information for calculating the optimum recording condition based on the optimum recording condition may be included.

  The optical recording method may include a step of recording newly created information for calculating optimum recording conditions on an optical recording medium.

  In the optical recording method for recording information on an optical recording medium including a plurality of recording area groups having different characteristics, the optical recording method includes a step of determining optimum recording conditions for at least one recording area group by trial writing; The recording area group includes a step of reading information for calculation recorded in the optical recording medium and determining the optimum recording condition by adding the calculation to the optimum recording condition obtained by the trial writing. You may go out.

  The optical recording apparatus according to the present invention performs an operation for determining an optimum recording condition for each recording area group a plurality of times in an optical recording apparatus that records information on an optical recording medium including a plurality of recording area groups having different characteristics. In the recording area group switching means (track switching section 22) for switching and selecting the recording area group for determining the optimum recording condition by trial writing, and the optimum recording condition in the recording area group selected by the recording area group switching means. The optimum recording condition setting means (recording condition determination unit 23) for determining the optimum recording condition by trial writing and the calculation for the optimum recording condition obtained by the trial writing for the other recording area group And an optimum recording condition calculation means (recording condition calculation unit 24) for determining an optimum recording condition.

  The optical recording apparatus may include a calculation information reading unit (acquisition unit 25a of the calculation information management unit 25) that reads information for calculating the optimum recording condition recorded in advance on the optical recording medium. Good.

  The optical recording apparatus performs trial writing in each recording area group by the optimum recording condition setting means (recording condition determination unit 23), determines each optimum recording condition, and based on those optimum recording conditions, Calculation information creating means for creating information for calculating the optimum recording condition (creating unit 25b of the computing information managing unit 25) may be provided.

  In the optical recording apparatus, when the operation for determining the optimum recording condition is performed a plurality of times by the optimum recording condition setting means (recording condition determining unit 23), the optimum recording area group is determined at least once or every plurality of times. A calculation information update unit (a correction unit 25c and an update unit 25d of the calculation information management unit 25) for determining the recording condition and updating information for calculating the optimum recording condition may be provided.

  The optical recording apparatus may include a newly created recording unit (recording unit 25e of the calculation information management unit 25) that records information for calculating optimum recording conditions on an optical recording medium.

  In the optical recording apparatus for recording information on an optical recording medium including a plurality of recording area groups having different characteristics, the optical recording apparatus is configured to determine an optimum recording condition for at least one recording area group by trial writing. (Recording condition determination unit 23) and other recording area groups read out information for calculation recorded on the optical recording medium, and add the calculation to the optimum recording condition obtained by trial writing. And an optimum recording condition calculation means (recording condition calculation unit 24) for determining the optimum recording condition.

  In the optical recording apparatus, the plurality of recording area groups having different characteristics may be lands and grooves.

  In the optical recording apparatus, the plurality of recording area groups having different characteristics may be first layer and second layer tracks.

  In the optical recording apparatus, the plurality of recording area groups having different characteristics may be lands and grooves of a first layer and a second layer.

  Also, the optical recording apparatus of the present invention uses a substrate with a guide groove having a land that is a convex portion and a groove that is a guide groove, and records both on the optical recording medium in which both the land and the groove are recording and reproducing tracks. In the optical recording apparatus, recording condition determining means for performing test writing with one of the land and groove as the first track and determining recording conditions for recording on the first track, and the recording condition determining means A recording condition calculation means for performing a calculation according to the calculation information based on the recording condition of the first track determined in step (a) and determining a recording condition for recording on the second track as the other track; Track switching means for switching one track between a land and a groove, and the calculation information to the recording condition calculation means, and the track switching means When switching the track by, or may be based on the result of trial writing result after switching trial writing before switching not include the operation information managing means for correcting the operation information.

  Further, the optical recording method of the present invention uses a substrate with a guide groove having a land that is a convex portion and a groove that is a guide groove, and records on both the land and the groove on a recording / reproducing track. In the optical recording method, a recording condition determination process for determining a recording condition at the time of recording on the first track by performing trial writing with one of the land and groove as the first track, and the recording condition determining process A recording condition calculation process for performing a calculation according to the calculation information on the basis of the recording condition of the first track determined in step 1 and determining a recording condition for recording on the second track as the other track; Result of trial writing before switching at the time of track switching processing for switching tracks between land and groove, and track switching by the track switching processing described above Based on the result of the test writing after switching may include a calculation information correction process of correcting the calculation information.

  With the above-described configuration and method, in the land / groove recording medium, the recording conditions of lands and grooves having different characteristics are determined by trial writing for one track (first track), and the other track (second track) is recorded. The recording condition is determined by calculating according to the calculation information based on the result of trial writing of the first track.

  Therefore, since the recording conditions for one track can be set by calculation for two tracks having different recording sensitivities, the time for setting the recording conditions can be shortened. Therefore, when the recording conditions are different between the land and the groove, the time required for the optical recording apparatus to interrupt the recording or reproducing operation to be performed under the user's instruction is reduced while the land and groove recording conditions are obtained. it can. Therefore, it is possible to avoid a decrease in performance of the optical recording apparatus such as a decrease in data transfer rate.

  Here, it is considered that the track recording conditions calculated according to the calculation information may be less accurate than the track recording conditions set by actually performing test writing.

  Therefore, in the above configuration and method, when the recording condition is set a plurality of times, the track on which trial writing is performed is switched between the land and the groove, and at the time of switching the track, the result of the trial writing before switching and after the switching The calculation information is corrected based on the result of the trial writing.

  That is, when trial writing is performed on the land with the previous recording condition setting and the groove recording condition is obtained by calculation, the groove recording condition is determined by trial writing in the current recording condition setting when the track is switched. At the same time, the calculation information for calculating the land recording condition is corrected based on the result of the previous land trial writing, and the land recording condition is determined by applying the result of the current groove test writing to the corrected calculation information. Determined by calculation.

  Accordingly, it is possible to correct the calculation information by switching the track on which the test writing is performed so that the number of times the test writing is performed on each track of the optical recording medium and the recording environment are not biased. Therefore, by making the accuracy of the recording condition by the calculation close to the recording condition by the trial writing, it is possible to reduce the deviation of the accuracy of the recording condition set for each track.

  Further, in the optical recording apparatus of the present invention, the calculation information management unit may include a creation unit that performs trial writing on the track and creates the calculation information.

  With the configuration described above, the optical recording apparatus can further perform trial writing on the track by the creating unit, and create calculation information for obtaining the recording condition of the track on which the trial writing has been performed based on the result. .

  Therefore, when the calculation information is not recorded in advance on the optical recording apparatus or the optical recording medium, it is possible to create the calculation information by performing trial writing and set the recording conditions.

  Furthermore, in the optical recording apparatus of the present invention, the calculation information management unit may include a recording unit that writes the calculation information to the optical recording medium.

  With the above configuration, the optical recording apparatus can further record the latest calculation information in, for example, a test area of the optical recording medium by the recording means.

  Therefore, calculation information for obtaining different recording conditions for each optical recording medium can be recorded on each recording medium. Therefore, when the next information is recorded, the calculation information can be read and used, so that the recording condition can be set with high accuracy. Further, since the calculation information is recorded on the recording medium, the same calculation information can be used in different optical recording apparatuses.

  Furthermore, in the optical recording apparatus of the present invention, the calculation information management unit may include an acquisition unit that reads the calculation information from the optical recording medium.

  With the configuration described above, the optical recording apparatus can further acquire calculation information recorded in, for example, a test area of the optical recording medium by the acquisition unit.

  Therefore, calculation information for obtaining different recording conditions for each optical recording medium can be read from each optical recording medium. Therefore, when recording information on the optical recording medium, the recording conditions can be set with high accuracy. In addition, since the calculation information is recorded on the recording medium, the same calculation information can be used in an optical recording apparatus different from the optical recording apparatus that recorded the calculation information.

  In order to solve the above problems, the optical recording apparatus of the present invention uses a substrate with a guide groove having a land that is a convex portion and a groove that is a guide groove, and records and reproduces both the land and the groove. In an optical recording apparatus for recording on an optical recording medium as a track, a recording condition for determining a recording light amount when performing a trial writing with either one of a land and a groove as a first track and recording on the first track Determining means; acquisition means for reading out information for calculation, which is a predetermined constant such as a ratio or difference between the recording light amounts of the land and groove of the second track, which is the other track, from the optical recording medium; and the recording condition determining means Based on the recording light quantity of the first track determined in step 1, the calculation is performed according to the calculation formula determined by the calculation information read out by the acquisition unit. A recording condition calculating means for determining the quantity of recording light for recording on the second track may be equipped.

  Further, in order to solve the above problems, the optical recording method of the present invention uses both a land with a guide groove having a land as a convex portion and a groove as a guide groove, and records and reproduces both the land and the groove. In an optical recording method for recording on an optical recording medium as a track, a recording condition for determining a recording light amount when performing a trial write with either one of a land and a groove as a first track and recording on the first track A determination process; a calculation information reading process for reading calculation information from the optical recording medium, which is a predetermined constant, such as a ratio or difference between the recording light amounts of the land and groove of the second track that is the other track; and the recording Based on the recording light quantity of the first track determined by the condition determination process, the calculation formula determined by the calculation information read by the calculation information read process is followed. Te performs operation may include a recording condition calculation process of determining the quantity of recording light for recording on the second track.

  With the above-described configuration and method, in the land / groove recording medium, the recording light amount (recording condition) of lands and grooves having different characteristics is determined, and the recording condition is determined by trial writing for one track (first track), and the other The recording condition is determined for the track (second track) by calculating according to the calculation information based on the result of trial writing of the first track.

  Therefore, since the recording conditions for one track can be set by calculation for two tracks having different recording sensitivities, the time for setting the recording conditions can be shortened. Therefore, when the recording conditions are different between the land and the groove, the time required for the optical recording apparatus to interrupt the recording or reproducing operation to be performed under the user's instruction is reduced while the land and groove recording conditions are obtained. it can. Accordingly, it is possible to avoid a decrease in performance of the optical recording apparatus such as a decrease in data transfer rate.

  Furthermore, with the above configuration and method, it is possible to obtain information for calculation for obtaining a different recording light amount (recording condition) for each optical recording medium, which is recorded in, for example, a test area of the optical recording medium. Therefore, when recording information on the optical recording medium, the recording conditions can be set with high accuracy. In addition, since the calculation information is recorded on the recording medium, the same calculation information can be used in an optical recording apparatus different from the optical recording apparatus that recorded the calculation information.

Furthermore, the optical recording apparatus of the present invention is characterized in that the optical recording medium is a multilayer recording medium having a recording layer as the track. The optical recording method of the present invention is characterized in that the optical recording medium is a multilayer recording medium having a recording layer as the track.

  With the above configuration and method, even in a multilayer recording medium having different recording sensitivities for each recording layer, it is possible to optimally set recording conditions for each recording layer. Therefore, the recording light quantity can be set with high sensitivity for each recording layer, so that the capacity of the optical disk can be increased.

FIG. 3 is a block diagram showing a configuration relating to setting of recording conditions in the optical recording apparatus shown in FIG. 2. 1 is a block diagram showing an outline of a configuration of an optical recording apparatus according to an embodiment of the present invention. 3 is a flowchart showing an outline of a recording condition setting operation performed by the optical recording apparatus shown in FIG. 3 is a flowchart showing an outline of a recording condition setting operation performed by the optical recording apparatus shown in FIG. 3 is a flowchart showing an outline of a recording condition setting operation performed by the optical recording apparatus shown in FIG. 3 is a flowchart showing an outline of a recording condition setting operation performed by the optical recording apparatus shown in FIG. FIG. 3 is an explanatory diagram showing a magneto-optical disk on which information is recorded by the optical recording apparatus shown in FIG. 2.

Explanation of symbols

1 Optical recording device 22 Track switching unit (track switching means)
23 Recording condition determining unit (recording condition determining means)
24 Recording condition calculation unit (recording condition calculation means)
25 Calculation Information Management Unit (Calculation Information Management Unit)
25a Acquisition unit (acquisition means)
25b Creation part (creation means)
25e Recording section (recording means)
D Magneto-optical disk (optical recording medium)
S5, S6, S13, S14, S17, S18 Recording condition determination processing S8, S9, S19, S20 Recording condition calculation processing S12 Track switching processing S15 Calculation information correction processing

Claims (7)

In an optical recording apparatus for recording on an optical recording medium having a plurality of recording layers having different characteristics,
Recording condition setting control means for starting the operation of recording condition setting;
When the recording condition setting control means starts the operation, switching means for selecting a part of the recording layers to perform test writing from the plurality of recording layers;
Recording condition determination means for performing test writing on the recording layer selected by the switching means and determining recording conditions for recording on the recording layer;
Based on the recording condition determined by the recording condition determining means, the recording condition calculating means for performing the calculation according to the calculation information and determining the recording condition when recording on the recording layer not selected by the switching means ,
When the switching means switches the recording layer on which the trial writing is performed from the recording layer on which the trial writing was performed when the recording condition setting control means last activated the operation, the result of the trial writing before the switching and An optical recording apparatus comprising: an operation information management unit that corrects the operation information based on a result of trial writing after switching.   The optical recording apparatus according to claim 1, wherein the calculation information management unit includes a generation unit that performs trial writing on the recording layer and generates the calculation information.   The optical recording apparatus according to claim 1, wherein the calculation information management means includes recording means for writing the calculation information to the optical recording medium.   The optical recording apparatus according to claim 1, wherein the calculation information management unit includes an acquisition unit that reads the calculation information from the optical recording medium. In an optical recording method for recording on an optical recording medium having a plurality of recording layers having different characteristics,
Recording condition setting control process for starting the recording condition setting operation;
When the operation is started by the recording condition setting control process, a switching process for selecting a recording layer for trial writing from the plurality of recording layers;
A recording condition determination process for performing test writing in the recording layer selected by the switching process and determining a recording condition when recording on the recording layer;
Based on the recording condition determined in the recording condition determination process, the calculation is performed according to the calculation information, and the recording condition calculation process for determining the recording condition when recording on the recording layer not selected by the switching process ;
When the recording layer to which the trial writing is performed is switched from the recording layer to which the trial writing was performed when the operation was last activated by the recording condition setting control processing by the switching process, the test writing before the switching is performed . An optical recording method comprising: a calculation information correction process for correcting the calculation information based on a result and a result of test writing after switching.   A control program for operating the optical recording apparatus according to any one of claims 1 to 4, wherein the control program causes a computer to function as each of the above means.   A computer-readable recording medium on which the control program according to claim 6 is recorded.

Images