JP4425902B2 - Optical recording condition setting method, optical recording / reproducing apparatus, control program, and recording medium - Google Patents

Description

  The present invention sets recording conditions by reading setting information for determining recording conditions stored in a specific area of an optical recording medium such as an optical disc or outputting the setting information from within the apparatus. The present invention relates to an optical recording condition setting method, an optical recording / reproducing apparatus, a control program, and a recording medium for correcting a recording condition by recording / reproducing in a specific area for obtaining a recording medium.

  As an optical disk device for recording a large amount of data, recordable DVDs such as DVD-RAM, DVD-RW, and DVD-R have been developed and are generally sold. In these optical disc apparatuses, a pulse train that changes in accordance with recorded information is converted into a pulse train that is finer than the minimum unit of information, the laser beam is intensity-modulated by the fine pulse train, and the intensity-modulated laser beam is applied to the medium. It is recorded by changing the physical characteristics of the medium by condensing and heating. Here, recording condition setting information for performing recording compensation such as a pulse width necessary for recording and the power of each laser beam is stored in advance on the optical disc as standard recording conditions.

  By the way, as the density of optical discs increases, strict setting is required in which standard recording conditions are set for each mark length or each combination of mark and space.

  However, when an optical disc recording / reproducing apparatus is mass-produced, individual apparatuses do not always have the same characteristics due to variations in the characteristics of components used and environmental changes. Similarly, optical disks themselves vary in characteristics during mass production, and even if recording is performed under the same recording conditions, the same mark shape is not always obtained on each optical disk. Therefore, even if the standard recording conditions determined by the standard device having the standard characteristics using the standard disk having the standard characteristics are used as they are, the mass-produced optical disk and the device having the characteristics varied, Depending on the combination, proper recording / reproduction is not performed, and there is a problem in that quality defects occur.

As a solution to this problem, Patent Document 1 discloses a method for obtaining a recording pulse condition obtained by correcting a recording pulse standard condition. In this method, in an optical disc in which recording pulse standard conditions are recorded in advance in a specific area, position information for all or one of the combinations of the space length and the mark length among the recording pulse standard conditions is stored. A value corrected from the recording pulse standard condition is set as the recording pulse condition of the recording / reproducing apparatus so that the jitter of the recording / reproducing signal is equal to or less than the allowable value by changing the quantity quantitatively.
Japanese Patent Laid-Open No. 2000-200408 (published July 18, 2000)

  By the way, in the conventional optical recording pulse condition setting method, as a technique, a predetermined amount of change is uniformly applied to all combinations of the space length and the mark length among the recording pulse standard conditions.

  However, if the mark formation characteristics differ depending on the recording conditions for each recording mark length, even if a predetermined amount of change is applied uniformly, a good recording mark may not be formed for all recording mark lengths. Has a point.

  Japanese Patent Laid-Open No. 2004-228688 also describes a method of giving a predetermined amount of change to any one of the combinations of the space length and the mark length as another method. Even in such a case, since only a part of the recording marks can be improved, there is a problem that a great improvement cannot be expected in the reproduction signal quality in the whole recording marks and spaces.

  Furthermore, only the parameter for the pulse width (recording pulse parameter) is optimized, but the parameter for the recording power included in the recording condition (recording power parameter) is not optimized.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an optical recording condition setting method and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and an optical recording / reproducing apparatus. And a control program and a recording medium.

In order to solve the above problems, an optical recording / reproducing apparatus for optical recording / reproducing apparatus according to the present invention performs optical modulation recording based on a recording condition corresponding to recorded information and reproduces recorded information. In the optical recording condition setting method of the device, after changing the recording power parameter for the shortest recording mark, performing test writing on the optical recording medium, reproducing the test writing, and selecting the recording power parameter that improves the playback signal quality Processing for changing the recording power parameter for the mark length in order from the shorter mark length, performing test writing on the optical recording medium, reproducing the test writing, and selecting the recording power parameter that improves the playback signal quality Is performed at least once.

In order to solve the above problems, the optical recording / reproducing apparatus of the present invention is the shortest in the optical recording / reproducing apparatus that performs optical modulation recording based on the recording conditions according to the recorded information and reproduces the recorded information. Individual recording power trial writing means for performing trial writing on the optical recording medium by changing the recording power parameter for the recording mark of the recording medium, and the reproduction signal for reproducing the trial writing by the individual recording power trial writing means and detecting the reproduction signal quality After selecting the quality detection means and the recording power parameter that improves the playback signal quality, test recording is performed on the optical recording medium by changing the recording power parameter for the mark length in order from the shorter mark length. And a selection means for performing at least one process of selecting a recording power parameter that improves the reproduction signal quality. It is.

  Note that the recording power parameter is a parameter related to power such as recording power, erasing power, and bias power shown in FIG. 3, but may be one of these parameters or a plurality of parameters.

  According to the above invention, when the recording power parameter that improves the reproduction signal quality is selected, the recording power parameter for the shortest recording mark is changed.

  That is, the shorter the mark length, the smaller the number of parameters to be changed in the recording power parameter, and the more difficult it is to set the recording power parameter for forming a recording mark with good reproduction signal quality. In addition, as the mark length is shorter, the appearance frequency increases in the data. Therefore, the shorter the mark length, the higher the influence on the entire mark and the more precise the setting.Therefore, by setting the recording power parameter for the shortest mark length better, the overall reproduction signal quality can be improved. large. As a result, if a recording power parameter that improves the reproduction signal quality is selected for the shortest recording mark, the influence of variations in characteristics of the writable optical disc and the optical recording / reproducing apparatus can be reduced with respect to the entire reproduction signal quality. it can.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

Also, an optical recording / reproducing apparatus setting method for optical recording / reproducing apparatus performs optical modulation recording based on a recording condition corresponding to recorded information and reproduces recorded information in order to solve the above-mentioned problem In the optical recording condition setting method, trial writing was performed by changing the recording power parameter for the recording mark with respect to the entire mark length, and the recording power parameter for the recording mark with respect to the total mark length was determined to obtain good reproduction signal quality. Then, change the recording power parameter for the shortest recording mark, perform test writing on the optical recording medium, reproduce the test writing, select the recording power parameter that improves the playback signal quality, and then start with the shorter mark length. sequentially, while changing the recording power parameters for the mark length, performs trial writing on the optical recording medium, a trial writing again And it is characterized by performing at least once the process of selecting a well comprising recording power parameters of the reproduction signal quality.

Further, in order to solve the above problems, an optical recording / reproducing apparatus of the present invention is an optical recording / reproducing apparatus that performs optical modulation recording based on a recording condition according to recorded information and reproduces recorded information. Recording power test writing means for performing trial writing by changing the recording power parameter for the recording mark with respect to the mark length, and test writing by the recording power test writing means, and determining the recording power parameter for the recording mark for all mark lengths Recording power determination means for performing recording on the optical recording medium by changing the recording power parameter for the shortest recording mark among the recording power parameters determined by the recording power determination means. Play back the trial writing by the individual recording power trial writing means and detect the playback signal quality. A signal quality detection means, after selecting the recording power parameters for better becomes the shortest recording mark reproducing signal quality, sequentially changes the recording power parameters for the mark length from shorter of mark lengths, try on an optical recording medium It is characterized by comprising selection means for performing writing, reproducing test writing, and selecting a recording power parameter that improves reproduction signal quality at least once.

  According to the above invention, first, the recording power parameter for each mark length is determined, and then the recording power parameter for the shortest mark length that improves the reproduction signal quality is selected. As a result, it is possible to optimize parameters for the recording power of all mark lengths. Further, it is possible to select the recording pulse parameter of the shortest mark that improves the reproduction signal quality in a state where the recording power parameters other than the shortest mark are fixed.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

  Further, the optical recording condition setting method of the optical recording / reproducing apparatus is the optical recording condition setting method of the optical recording / reproducing apparatus described above, after selecting a recording power parameter for the shortest recording mark, from the shorter mark length, The recording power parameter with respect to the mark length is changed, the test writing is performed on the optical recording medium, the test writing is reproduced, and the process of selecting the recording power parameter that improves the reproduction signal quality is performed at least once. .

  The optical recording / reproducing apparatus of the present invention is the optical recording / reproducing apparatus described above, wherein the selecting means selects a recording power parameter for the shortest recording mark, and then performs recording for the mark length from the shorter mark length. It is characterized in that the power parameter is changed, test writing is performed on the optical recording medium, the test writing is reproduced, and the process of selecting the recording power parameter that improves the reproduction signal quality is performed at least once.

  According to the above invention, after setting the recording power parameter of the shortest mark, the recording power parameter for the mark length is changed from the shorter mark length, the test writing is performed on the optical disc, the test writing is reproduced, The process of selecting the recording power parameter that improves the reproduction signal quality is performed at least once. Therefore, not only the recording power parameter for improving the reproduction signal quality for the shortest recording mark but also the recording signal for improving the reproduction signal quality for the recording marks longer than the shortest recording mark such as 3T mark, 4T mark,. Select power parameters. In the present invention, the process of selecting the recording power parameter is performed at least once. For example, when there is a 2T mark to an 8T mark, the 7T mark is not used until the recording power parameter is selected for the 8T mark. This indicates that the process may end when the recording power parameter is selected.

  In the present invention, the recording power parameter for the mark length is changed from the shorter mark length. Therefore, not only the recording power parameter is changed one by one for each mark length, but also the mark length to be performed next is changed, for example, the recording power parameter of the 5T mark is changed instead of the 4T mark after the 3T mark. As long as it is longer than the current mark length.

  As a result, it is possible to reduce the influence of variations in the characteristics of the writable optical disc and the optical recording / reproducing apparatus with respect to the recording mark with higher accuracy, to obtain an optimum recording power parameter, and to obtain a good reproduction signal quality. Recording conditions can be set efficiently.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

  Also, an optical recording / reproducing apparatus setting method for optical recording / reproducing apparatus performs optical modulation recording based on a recording condition corresponding to recorded information and reproduces recorded information in order to solve the above-mentioned problem In this optical recording condition setting method, after changing the recording pulse parameter for the recording mark and performing trial writing to determine the recording pulse parameter for the recording mark that can obtain good reproduction signal quality, recording on the shortest recording mark is performed. It is characterized in that the power parameter is changed, trial writing is performed on the optical recording medium, the test writing is reproduced, and the recording power parameter that improves the reproduction signal quality is selected.

  Further, in order to solve the above problems, an optical recording / reproducing apparatus of the present invention is an optical recording / reproducing apparatus that performs optical modulation recording based on a recording condition according to recorded information and reproduces recorded information. Recording pulse trial writing means for performing test writing by changing the recording pulse parameter for the recording mark with respect to the mark length, and test writing by the recording pulse trial writing means, and reproducing the recording pulse parameter for the recording mark for the entire mark length Recording pulse determining means for performing recording on the optical recording medium by changing the recording power parameter for the shortest recording mark among the recording pulse parameters determined by the recording pulse determining means. Play back the trial writing by the individual recording power trial writing means and detect the playback signal quality. A signal quality detection means, it is characterized in that it comprises a selecting means for selecting the recording power parameters for better becomes the shortest recording mark reproducing signal quality.

  The recording pulse parameters are parameters relating to the width of the recording pulse, such as the start end pulse start position dTtop, the start end pulse width Ttop, the end part pulse end position dTe, and the intermediate part pulse width Tmp shown in FIG. However, it may be one of these parameters or a plurality of parameters.

  According to the above invention, first, the recording pulse parameter for each mark length that improves the reproduction signal quality is selected, and then the recording power parameter of the shortest mark is determined. As a result, it is possible to optimize parameters for the recording pulse. Further, the recording power parameter of the shortest mark can be determined in a state where the recording pulse parameter that improves the reproduction signal quality is fixed.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

An optical recording condition setting method for an optical recording / reproducing apparatus may be tested on an optical recording medium before selecting a recording power parameter for the shortest recording mark in the above-described optical recording condition setting method for an optical recording / reproducing apparatus. When the recording power parameter for the shortest recording mark used for writing is changed within a predetermined range, and the recording power parameter for the shortest recording mark that can obtain good reproduction signal quality within the predetermined range is not obtained, The recording pulse parameter corresponding to the recording power parameter for the shortest recording mark is changed by a predetermined change amount . Further, in the optical recording condition setting method of the optical recording / reproducing apparatus, the recording pulse parameter corresponding to the recording power parameter for the shortest recording mark based on the result of trial writing on the optical recording medium is changed to the corresponding recording power parameter. To reduce when it seems to grow too large, and to prevent it when it is too low
It is characterized by changing. Further, in the optical recording condition setting method of the optical recording / reproducing apparatus, the mark used for test writing on the optical recording medium before selecting a recording power parameter for the mark length, which is changed from a shorter mark length. When the recording power parameter for the mark length that changes the recording power parameter with respect to the length within a predetermined range and does not obtain the recording power parameter for the mark length that provides good reproduction signal quality within the predetermined range, corresponds to the recording power parameter for the mark length The recording pulse parameter is changed by a predetermined change amount. Further, in the optical recording condition setting method of the optical recording / reproducing apparatus, the recording pulse parameter corresponding to the recording power parameter for the mark length based on the result of the trial writing on the optical recording medium, the corresponding recording power parameter is It is characterized by being changed so as to be reduced when it is likely to be too large, and to be prevented when it is too low.

  According to the invention described above, the recording pulse parameter is changed before the recording power parameter is selected, so that the recording pulse parameter is optimized and then the reproduction signal quality is improved with the recording pulse parameter fixed. A recording power parameter can be selected.

Further, the optical recording condition setting method of the optical recording / reproducing apparatus is the above-described optical recording condition setting method of the optical recording / reproducing apparatus, wherein the range of the change amount of the recording power parameter with respect to the shortest recording mark used for test writing is: The recording power parameter is set based on a value of a recording power parameter that provides a good reproduction signal quality when a predetermined amount of change is applied to the recording pulse parameter corresponding to the recording power parameter for the shortest recording mark . Further, in the optical recording condition setting method of the optical recording / reproducing apparatus described above, a range of a change amount of the recording power parameter with respect to the mark length, which is changed from the shorter one of the mark lengths used for test writing, is the mark length. The recording power parameter is set based on the value of the recording power parameter that provides good reproduction signal quality when a predetermined amount of change is given to the recording pulse parameter corresponding to the recording power parameter.

  According to the above invention, a good reproduction signal quality can be obtained when a predetermined variation is given to the recording pulse parameter corresponding to the recording power parameter within the range of the variation of the recording power parameter used for the test writing. Since the setting is made based on the value of the recording power parameter, it is possible to prevent the recording power parameter from being excessively increased or decreased and to set the recording power parameter and the recording pulse parameter with better accuracy.

  An optical recording condition setting method for an optical recording / reproducing apparatus is characterized in that, in the optical recording condition setting method for the optical recording / reproducing apparatus, the reproduction signal quality is jitter.

  An optical recording condition setting method for an optical recording / reproducing apparatus is characterized in that, in the optical recording condition setting method for an optical recording / reproducing apparatus, the reproduction signal quality is an error rate.

  That is, the jitter and the error rate are often used as indices for defining the power margin of the optical disc, and the recording state can be indicated by a value that matches the margin regulation threshold of the optical disc.

  In this regard, according to the present invention, since the reproduction signal quality is jitter, the reproduction signal quality can be improved from the viewpoint of jitter, that is, pulse distortion.

  Further, according to the present invention, since the reproduction signal quality is an error rate, the reproduction signal quality can be improved from the viewpoint of the error rate.

  An optical recording condition setting method for an optical recording / reproducing apparatus is the optical recording condition setting method for an optical recording / reproducing apparatus described above, wherein the optical recording medium has recording conditions including a recording power parameter and a recording pulse parameter in advance. The recording condition is stored, the recording condition is read, and the recording condition used for test writing is set based on the recording condition.

  According to the above invention, the optical recording medium stores in advance the recording conditions including the recording power parameter and the recording pulse parameter, reads the recording condition, and sets the recording condition to be used for the test writing based on the recording condition. Since it is set, the recording condition used for the test writing can be set based on the recording condition recorded on the optical recording medium.

  A control program of the present invention is a control program for operating the above-described optical recording / reproducing apparatus to solve the above-described problems, and is characterized in that a computer functions as each of the above-described means.

  According to said invention, the control program which makes a computer function as said each means can be provided.

  In addition, a computer-readable recording medium of the present invention is characterized in that the control program described above is recorded in order to solve the above problems.

  According to the above invention, it is possible to provide a computer-readable recording medium in which a control program is recorded.

  As described above, the optical stripe recording condition setting method and the optical recording / reproducing apparatus of the present invention have an effect that the influence of the characteristic variation of the writable optical disc and the optical recording / reproducing apparatus can be reduced.

[Embodiment 1]
An embodiment of the present invention will be described with reference to FIGS. 1 to 6 as follows.

  In the optical disc apparatus 1 as an optical recording / reproducing apparatus to which the optical recording condition setting method of the present embodiment is applied, as shown in FIG. 1, the control unit 20 moves the pickup drive circuit 13 to a track (not shown) of the rotating optical disc 10. The pickup 12 is moved via

  The pickup 12 is provided with an optical head 11. Then, the control unit 20 sets recording conditions via the laser drive circuit 14 and irradiates the recording part of the optical disk 10 with a recording laser beam from the optical head 11, whereby information is recorded on the track of the optical disk 10. .

  In the optical disc apparatus 1, the control unit 20 moves the pickup 12 to the recording part of the optical disc 10 via the pickup drive circuit 13. Then, the control unit 20 irradiates the optical disk 10 with a reproduction laser beam from the optical head 11 via the laser drive circuit 14.

  The reflected light detected by the optical head 11 is converted into a reproduction signal by the reproduction circuit 15 and input to the control unit 20. As a result, the optical disc apparatus 1 reproduces the information recorded on the track of the optical disc 10.

  Here, the optical disc apparatus 1 is particularly provided with a sensor 30. The sensor 30 is for detecting the loading of the optical disk 10 and / or for detecting a change in the recording environment on the optical disk 10, for example, a temperature sensor for detecting the temperature of the recording part of the optical disk 10. It is made up of. Then, the sensor 30 outputs the detected result to the control unit 20 as a detection signal.

  In addition to when the optical disc 10 is loaded in the optical disc apparatus 1, the control unit 20 detects a predetermined change in the recording environment from the detection signal of the sensor 30 during the information recording operation, or the previous trial. When a predetermined time has elapsed since writing, the recording condition setting operation is appropriately started.

  As shown in FIG. 2, the optical disc apparatus 1 sets recording conditions based on trial writing to the setting area 41 of the optical disc 10. Information is recorded on each track according to the recording condition. Note that the recording operation to the user area 42 after setting the recording conditions of the optical disc apparatus 1 is the same as a generally known operation. It is assumed that standard recording conditions including a recording power parameter and a recording pulse parameter are recorded in advance in the setting area 41.

  The optical disc apparatus 1 reads the standard recording conditions in the setting area 41 and uses the standard recording conditions for setting the recording conditions. Further, the read standard recording conditions may be stored in a memory which is a storage means provided in the control unit 20 and read and used. Alternatively, instead of reading the standard recording condition in the setting area 41, the standard recording condition may be read in advance and stored in the storage means provided in the control unit 20. The position of the setting area 41 is not limited to the position shown in FIG. 2, and may exist at an arbitrary radial position of the optical disc 10, or a plurality of setting areas 41 may exist.

  Next, a specific optical recording condition setting method in the present embodiment will be described with reference to FIGS. In the following description, (1, 7) RLL (Run Length Limited code) will be described as an example of the modulation method. However, the present invention is not limited to the (1,7) RLL modulation method. The (1, 7) RLL code is a code in which the minimum value and the maximum value of the inversion interval are limited in magnetic and optical digital recording. Further, in this (1, 7) RLL modulation system, as will be described in detail later, the pulse train of the recording pulse has a shortest recording mark composed of a start end portion and a terminal end portion. A long recording mark is constructed by adding an intermediate portion corresponding to the mark length between the start end portion and the end portion. In other modulation systems, for example, the shortest recording mark length starts from 3T, and at this time, the shortest recording mark length is configured by a start end portion, an intermediate portion, and an end portion (for example, DVD-RW etc.). Further, even if the shortest mark length is 2T, there are cases where the shortest mark length is composed only of the start end (for example, DVD-R).

  As shown in FIG. 3, in consideration of the medium temperature distribution for recording on the optical disc 10, a pulse train corresponding to the recording information is set. FIG. 3 shows a pulse train for dealing with 4T marks.

  As described above, the pulse train is configured by combining the start and end portions, and the intermediate portion above the 3T mark. Here, T represents the time for one clock cycle. Therefore, for example, a 4T mark refers to a mark, that is, a recording area where “1” is recorded in a time corresponding to four clock cycles.

  As shown in the figure, the pulse train is composed of a recording power (Pw), an erasing power (Pe), and a bias power (Pc), which are called recording power parameters. In the figure, the recording power parameters of the pulses at the start end and the intermediate portion are the same. However, the recording power parameters are not necessarily limited to this, and a separate recording power may be used for each pulse.

  Next, FIGS. 4A, 4B, and 4C show a pulse train for forming each of the 2T mark to the 4T mark and each recording pulse parameter. That is, in the figure, dTtop, Ttop, dTe, and Tmp are recording pulse parameters. The above-mentioned dTtop indicates the pulse start position at the start end, Ttop indicates the pulse width at the start end, dTe indicates the pulse end position at the end, and Tmp indicates the pulse width at the intermediate portion. The shape of the recording mark changes. Standard values of these parameters are recorded in advance as standard recording conditions in the setting area 41 of the optical disc 10.

  Each recording power parameter is set for each mark length, and the setting is independent. That is, the setting of the recording pulse parameter (starting end and end) of the shortest recording mark is not used for setting the starting end and end of other mark lengths. In FIG. 4, as the recording power parameter setting for each mark length, the parameter Pw (2-1) is set for the 2T mark, and the parameters Pw (3-1) and Pw (3-2) are set to 4T for the 3T mark. The mark has a recording power parameter for each pulse of each mark length, such as parameters Pw (4-1), Pw (4-2), Pw (4-3),.

  Here, the relationship between each parameter and the formed recording mark is shown.

  First, when the start end pulse start position dTtop increases, the start end position of the recording mark moves forward. Conversely, when the start end pulse start position dTtop becomes smaller, the start end position of the recording mark moves backward.

  When the start end pulse width Ttop increases, the length of the recording mark at the head portion increases in the track direction. Conversely, when the start end pulse width Ttop decreases, the length of the recording mark at the head portion decreases in the track direction. To do. Further, the recording power parameter of the start end pulse of each mark length, that is, the parameter Pw (2-1) for the 2T mark, the parameter Pw (3-1) for the 3T mark, the parameter Pw (4-1) for the 4T mark,. When .larger. Is increased, the width in the track direction of the head portion of the recording mark is increased. Conversely, when the mark is decreased, the width of the head portion of the recording mark is decreased in the track direction.

  Further, when the end pulse end position dTe increases, the end position of the recording mark moves backward. Conversely, when the end pulse end position dTe becomes smaller, the end position of the recording mark moves forward.

  Furthermore, when the intermediate part pulse width Tmp increases, the length of the recording mark in the track direction increases. Conversely, when the intermediate pulse width Tmp is reduced, the length in the track direction is reduced. Further, when the recording power parameter of the intermediate pulse of each mark length, that is, the parameter Pw (3-2) for the 3T mark, the parameters Pw (4-2), Pw (4-3),. The width of the recording mark in the track direction increases. Conversely, when the intermediate pulse width Tmp is reduced, the width in the track direction is reduced.

  Next, using a test pattern including 2T mark to 8T mark, a jitter value when test writing was performed was measured. FIG. 5 shows the result of measuring the jitter as a detection amount of the reproduction signal quality by recording only the 2T mark recording power parameter Pw (2-1). Jitter refers to disturbances such as amplitude, pulse width, pulse position, repetition frequency, and pulse interval in a pulse train. From this result, the condition that provides the best jitter is selected and set as the recording power parameter for the 2T mark.

  Next, a specific operation of recording condition setting in the optical disc apparatus 1 will be described based on a flowchart shown in FIG.

  First, the optical disc apparatus 1 reads and sets the standard recording conditions from the optical disc 10 under the control of the control unit 20 (S1). Subsequently, N representing the mark length is set to the value of the shortest mark length (S2). Here, if (1, 7) RLL is taken as an example of the modulation scheme, the value of N is set to 2.

  Next, only the recording power parameter for the 2T mark is changed, and a test pattern is written on the setting area 41 by trial (S3). Further, the recorded test pattern is reproduced (S4). Then, based on the reproduction signal quality obtained in S4, a recording power parameter that makes the reproduction signal quality good is determined from the recording pulse conditions used for the test writing. (S5).

  Note that, as the reproduction signal quality detection amount, not only jitter but also an error rate can be used.

  Both the error rate and the jitter are often defined as the power margin of the optical disc 10, and the recording state can be indicated by a value that matches the margin defined threshold of the optical disc.

  By the way, conventionally, when the mark formation characteristics with respect to the recording conditions differ for each recording mark length, even if a predetermined amount of change is uniformly applied, a good recording mark is not always formed at the mark length. Had problems.

  However, in the present embodiment, when a recording power parameter that improves the reproduction signal quality is selected, the recording power parameter for the shortest recording mark is changed.

  That is, the shorter the mark length, the smaller the number of parameters to be changed in the recording power parameter, and the more difficult it is to set the recording power parameter for forming a recording mark with good reproduction signal quality. In addition, as the mark length is shorter, the appearance frequency increases in the data. Therefore, the shorter the mark length, the higher the influence on the entire mark and the more precise the setting.Therefore, by setting the recording power parameter for the shortest mark length better, the overall reproduction signal quality can be improved. large.

  As a result, if a recording pulse condition that improves the reproduction signal quality is selected for the shortest recording mark, the influence of variations in the characteristics of the writable optical disc 10 and optical disc apparatus 1 can be reduced with respect to the overall reproduction signal quality. it can.

  Further, conventionally, with respect to the method of giving a predetermined amount of change to any one of the combinations of the space length and the mark length, only a part of the recording marks can be improved even with the same mark length. However, in the present embodiment, since the reproduction signal quality is considered for all the recording marks, there is a problem that the reproduction signal quality in the recording marks and spaces of the recording medium cannot be expected to be greatly improved. There is no problem with.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. Therefore, for convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the optical recording condition setting method of the present embodiment, the number of recording pulse condition settings is increased each time the recording mark length increases.

  That is, as described above, the shorter the mark length, the smaller the number of parameters to be changed in the recording power parameter, and the more difficult it is to set the recording pulse condition for forming a recording mark with good reproduction signal quality. In addition, as the mark length is shorter, the appearance frequency increases in the data. Therefore, in this embodiment, by setting each recording power parameter from the shortest mark length to the longest mark length, the recording power parameter for obtaining good reproduction signal quality can be efficiently performed. It is possible to do.

  An optical recording pulse condition setting method in the optical disc apparatus 1 of the present embodiment will be described based on the flowchart of FIG. This flowchart is continued from S5 of the first embodiment, and the description up to S5 is the same as described above, and is therefore omitted.

  In the present embodiment, following S5 of the first embodiment, first, the reproduction signal quality of trial writing is detected (S11). If a result better than the predetermined reproduction signal quality is obtained in S11, the recording power parameter setting is terminated. On the other hand, if a good result is not obtained, it is determined whether or not the mark length N (N is an integer of 2 or more) is the maximum (S12).

  If the mark length N is the maximum in S12, the recording condition setting operation is terminated because good reproduction signal quality is not obtained even if the recording conditions are set for all the mark lengths. Thereafter, the track used for the trial writing may be changed and the recording condition setting operation may be performed again, or an error display indicating a disk defect may be performed.

  On the other hand, if the mark length N is not the maximum in S12, the mark length is set to N + 1 (S13). And it returns to S3 of the flowchart shown in FIG.

  Thereby, the recording power parameter setting for obtaining a good reproduction signal quality can be performed efficiently.

  In the above description, the mark length is set to N + 1 in S13. However, the present invention is not limited to this, and it is possible to interrupt the number to be added to a number larger than 1, such as 2 or more. is there.

  As described above, in the optical recording condition setting method of the present embodiment, after setting the recording power parameter, trial recording is performed on the optical disc 10 by changing the recording power parameter for the mark length from the shorter mark length. Then, the process of reproducing the test writing and selecting the recording power parameter that improves the reproduction signal quality is performed at least once.

  Therefore, not only the recording power parameter for improving the reproduction signal quality for the shortest recording mark but also the recording power for improving the reproduction signal quality for recording marks longer than the shortest recording mark such as 3T mark, 4T mark,. Select a parameter.

  The process of selecting the recording power parameter is performed at least once. For example, when there are 2T mark to 8T mark, the recording pulse condition for the 7T mark is not performed without selecting the recording pulse condition for the 8T mark. This indicates that the process may end when the condition is selected. Further, the recording power parameter for the mark length is changed from the shorter mark length. Therefore, not only the recording power parameter is changed one by one for each mark length, but also the mark length to be performed next is changed, for example, the recording power parameter of the 5T mark is changed instead of the 4T mark after the 3T mark. Indicates that the mark length should be longer than the current mark length.

  As a result, with respect to all the recording marks, the influence of variations in the characteristics of the writable optical disc and the optical disc apparatus 1 can be reduced more accurately, the optimum recording pulse condition can be obtained, and good reproduction signal quality can be obtained. Therefore, the recording power parameter can be set efficiently.

[Embodiment 3]
The following will describe another embodiment of the present invention with reference to FIG. The configurations other than those described in the present embodiment are the same as those in the first embodiment and the second embodiment. Therefore, for convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and Embodiment 2 are given the same reference numerals, and the description thereof is omitted.

  In the optical recording condition setting method of this embodiment, before setting the recording power parameter for each mark length, the recording power parameter for all good mark lengths is set by trial writing. Thereby, it is possible to set the recording power parameter with better accuracy.

  In this embodiment, in order to obtain a good recording power parameter, the trial writing is performed by uniformly changing the recording power parameter for all mark lengths. In the case of uniform change, the recording power parameter, that is, at least one of the recording power, the erasing power, and the bias power shown in FIG. The predetermined power may be increased or decreased.

  An optical recording condition setting method in the optical disc apparatus 1 of the present embodiment will be described based on the flowchart of FIG.

  First, the optical disk device 1 changes the recording power parameters for all mark lengths and test-writes a test pattern (S21). Subsequently, the recorded test pattern is reproduced (S22). Next, an optimum recording power parameter is determined from the recording power parameters used for the test writing based on the detection result of the reproduction signal obtained in S22 (S23). Thereafter, S1 and subsequent steps in FIG. 6 in the first embodiment are performed.

  Therefore, in the present embodiment, first, the recording power parameter for all the mark lengths is determined, and then the recording power parameter for each mark length that improves the reproduction signal quality is selected.

  As a result, it is possible to optimize recording power parameters for all mark lengths. Further, it is possible to select a recording power parameter that improves the reproduction signal quality in a state where the recording power parameter is fixed.

  In the present embodiment, the case has been described as an example in which the test writing is performed by uniformly changing the recording power parameters for all mark lengths, but the present invention is not limited to this. The recording power parameter for an arbitrary mark length may be changed, and the amount of change may not be uniform and arbitrary.

[Embodiment 4]
The following will describe another embodiment of the present invention with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first to third embodiments. Therefore, for convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 3 are given the same reference numerals, and descriptions thereof are omitted.

  In the optical recording condition setting method of this embodiment, before setting the recording power parameter for each mark length, recording pulse parameters for all good mark lengths are set by trial writing. Thereby, it is possible to set the recording power parameter and the recording pulse parameter with better accuracy.

  Further, in this embodiment, in order to obtain a good recording power parameter, trial writing is performed by changing the recording pulse parameter for all mark lengths. In the case of uniform change, the recording pulse parameters, that is, the pulse start position dTtop at the start end, the pulse width Ttop at the start end, the pulse end position dTe at the end, and the intermediate end shown in FIG. At least one of the pulse widths Tmp may be changed by a factor, or a predetermined amount may be increased or decreased.

  An optical recording condition setting method in the optical disc apparatus 1 of the present embodiment will be described based on the flowchart of FIG.

  First, the optical disk device 1 changes test pulse parameters for all mark lengths and writes a test pattern on a trial basis (S31). Subsequently, the recorded test pattern is reproduced (S32). Next, the optimum recording pulse parameter is determined from the recording pulse parameters used for the test writing based on the detection result of the reproduction signal obtained in S32 (33). Thereafter, S1 and subsequent steps in the flowchart of FIG. 6 in the first embodiment are performed.

  Therefore, in the present embodiment, first, the recording pulse parameters for all the mark lengths are determined, and then the recording power parameters for each mark length that improve the reproduction signal quality are selected.

  As a result, it is possible to optimize recording pulse parameters for all mark lengths. Further, it is possible to select a recording power parameter that improves the reproduction signal quality in a state where the recording pulse parameter is fixed. The selection may be performed at least once.

  In the present embodiment, the case has been described as an example in which trial writing is performed by uniformly changing the recording pulse parameters for all mark lengths, but the present invention is not limited to this. The recording pulse parameter for an arbitrary mark length may be changed, and the amount of change may not be uniform but arbitrary.

[Embodiment 5]
The following will describe still another embodiment of the present invention with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first to fourth embodiments. Therefore, for convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 4 are given the same reference numerals, and descriptions thereof are omitted.

  In the third embodiment, the recording power parameters for all mark lengths are set first, and then the recording power parameters for each mark length are set.

  In the optical recording condition setting method of the present embodiment, on the contrary, after setting the recording power parameter for each mark length, the recording power parameter for all the good mark lengths is set by trial writing. In other words, the recording power parameter for obtaining better reproduction signal quality is set by performing trial writing by uniformly changing the recording power parameter for all mark lengths. This also makes it possible to set recording power parameters with better accuracy.

  In this embodiment as well, as in the third embodiment, in order to obtain a good recording power parameter, trial writing is performed by uniformly changing the recording power parameters for all mark lengths. However, when changing uniformly, it may be changed by a factor of the recording power parameter, that is, at least one of the recording power, the erasing power, and the bias power in FIG. 4, or the predetermined power may be increased or decreased. The same is true for the third embodiment.

  The optical recording condition setting method in the optical disc apparatus 1 of the present embodiment will be described based on the flowchart of FIG. This flowchart is continued from S5 of the first embodiment, and the description up to S5 is the same as described above, and is therefore omitted.

  As shown in the figure, the optical disc apparatus 1 first executes up to S5 shown in the flowchart of FIG. 6 in the first embodiment, and then changes the recording power parameter to test-write a test pattern ( S41). Subsequently, the recorded test pattern is reproduced (S42). Based on the detection result of the reproduction signal obtained in S42, an optimum recording power parameter is determined from the recording power parameters used for the test writing (S43).

  As described above, after setting the recording pulse parameter, it is possible to set a more accurate recording condition by setting a good recording power parameter by trial writing.

  In the present embodiment, the case has been described as an example in which the test writing is performed by uniformly changing the recording power parameters for all mark lengths, but the present invention is not limited to this. The recording power parameter for an arbitrary mark length may be changed, and the amount of change may not be uniform and arbitrary.

[Embodiment 6]
The following will describe still another embodiment of the present invention with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first to fifth embodiments. Therefore, for convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 5 are given the same reference numerals, and descriptions thereof are omitted.

  In the fourth embodiment, the recording power parameters are set after setting the recording pulse parameters for all mark lengths first.

  In the optical recording condition setting method of the present embodiment, on the contrary, after setting the recording power parameter, a good recording pulse parameter is set by trial writing. This also makes it possible to set recording power parameters and recording pulse parameters with higher accuracy.

  In the present embodiment, as in the fourth embodiment, in order to obtain a good recording power parameter, test writing is performed by changing the recording pulse parameters for all mark lengths. In the case of changing uniformly, the recording pulse parameters, that is, the pulse start position dTtop at the start end, the pulse width Ttop at the start end, the pulse end position dTe at the end, and the intermediate end of the pulse shown in FIG. At least one of the pulse widths Tmp may be changed by a factor, or a predetermined amount may be increased or decreased.

  The optical recording condition setting method in the optical disc apparatus 1 of the present embodiment will be described based on the flowchart of FIG. This flowchart is a continuation of S5 of the flowchart shown in FIG. 6 of the first embodiment, and the description up to S5 is the same as described above, and will be omitted.

  As shown in the figure, the optical disc apparatus 1 first executes up to S5 of the first embodiment, and then changes the recording pulse parameter and trial-writes the test pattern (S51). Subsequently, the recorded test pattern is reproduced (S52). Then, based on the detection result of the reproduction signal obtained in S52, an optimum recording pulse parameter is determined from the recording pulse parameters used for the trial writing (S53).

  As described above, after setting the recording power parameter, by setting a good recording pulse parameter by trial writing, it is possible to set a more accurate recording condition.

  In the present embodiment, the case has been described as an example in which trial writing is performed by uniformly changing the recording pulse parameters for all mark lengths, but the present invention is not limited to this. The recording pulse parameter for an arbitrary mark length may be changed, and the amount of change may not be uniform but arbitrary.

[Embodiment 7]
The following will describe still another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first to sixth embodiments. Therefore, for convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 6 are given the same reference numerals, and descriptions thereof are omitted.

  In the fourth embodiment, the recording power parameters are set after setting the recording pulse parameters for all mark lengths first.

  In the optical recording condition setting method of the present embodiment, the recording power parameter is set based on the result of the trial writing after setting the recording power parameter, thereby changing the recording pulse parameter corresponding to the recording power parameter to be changed. Good recording power parameters and recording pulse parameters can be set.

  First, in this embodiment, the jitter value when test writing is performed is measured using a test pattern including 2T mark to 8T mark. The results are shown in FIGS.

  In FIG. 12, when the end pulse end position dTe of the 2T mark is changed back and forth, recording is performed by changing only the recording power parameter Pw (2-1) of the 2T mark, and the best reproduction signal quality is obtained. The change in the recording power value is shown. As the end pulse end position dTe of the 2T mark changes forward (in the plus direction in the graph), the value of the recording power parameter Pw (2-1) of the 2T mark that provides the best reproduction signal quality decreases. I understand.

  FIG. 13 shows the recording power at which the best reproduction signal quality is obtained when recording is performed by changing only the recording power parameter Pw (2-1) of the 2T mark when the start end pulse width Ttop of the 2T mark is changed. The change in value is shown. It can be seen that the value of the recording power parameter Pw (2-1) of the 2T mark for obtaining the best reproduction signal quality decreases as the starting end pulse width Ttop of the 2T mark increases.

  In FIG. 14, when the start pulse start position dTtop of the 2T mark is changed back and forth, recording is performed by changing only the recording power parameter Pw (2-1) of the 2T mark, and the best reproduction signal quality is obtained. The change in the recording power value is shown. The value of the recording power parameter Pw (2-1) of the 2T mark for obtaining the best reproduction signal quality decreases as the starting end pulse start position dTtop of the 2T mark changes forward (in the positive direction in the graph). I understand.

  In FIG. 15, when the intermediate pulse width Tmp of the 3T mark is changed back and forth, recording is performed by changing only the recording power parameter Pw (3-2) of the 3T mark, and the best reproduction signal quality is obtained. The change in power value is shown. It can be seen that the value of the recording power parameter Pw (3-2) of the 3T mark that provides the best reproduction signal quality decreases as the intermediate pulse width Tmp of the 3T mark increases.

  From these results, it can be seen that by changing the recording pulse parameter corresponding to each recording power parameter, the value of the recording power parameter capable of obtaining the best reproduction signal quality is changed. In other words, when trial writing is performed while changing the recording power parameter and the value of the recording power parameter is likely to become too large, the increase of the recording power parameter is reduced by changing the value of the corresponding recording pulse parameter. Can do.

  For example, referring to FIG. 12, when the end pulse end position dTe of the 2T mark is 2 ns, the value of the recording power parameter Pw (2-1) that can obtain the best reproduction signal quality is 5. 6 mW. However, if the end pulse end position dTe is set to ± 0 ns, the recording power parameter Pw (2-1) can be reduced to 5.2 mW. Conversely, by changing the value of the corresponding recording pulse parameter, it is possible to prevent the recording power parameter from being excessively lowered. For example, referring to FIG. 12, when the end pulse end position dTe of the 2T mark is −2 ns, the value of the recording power parameter Pw (2-1) that can obtain the best reproduction signal quality is 4 It becomes small with .8mW. However, if the end pulse end position dTe is set to ± 0 ns, the recording power parameter Pw (2-1) can be set to 5.2 mW.

  In other words, if the recording power parameter change amount range used for test writing is set in advance and a recording power parameter that provides good reproduction signal quality within that range cannot be obtained, the recording power parameter is set to A trial write may be performed by giving a predetermined change amount to the corresponding recording pulse parameter and changing the value of the recording power parameter. At this time, the range of the change amount of the recording power parameter used for the test writing is a recording power parameter that provides a good reproduction signal quality when a predetermined change amount is given to the recording pulse parameter corresponding to the recording power parameter. It may be set based on the value of.

  Referring to FIG. 12, the optimum recording power parameter when the terminal pulse end position dTe is changed by -2 ns is 4.8 mW, and the optimum recording power parameter when +2 ns is changed is 5.6 mW. For example, when the end pulse end position dTe, which is a recording pulse parameter, is set to ± 0 ns, the range in which the recording power parameter is changed may be set from 4.8 mW to 5.6 mW.

  The optical recording condition setting method in the optical disc apparatus 1 of the present embodiment will be described based on the flowchart of FIG. This flowchart is a continuation of S5 of the flowchart shown in FIG. 6 of the first embodiment, and the description up to S5 is the same as described above, and will be omitted.

  As shown in the figure, the optical disc apparatus 1 first detects the reproduction signal quality of the trial writing following S5 of the flowchart shown in FIG. 6 of the first embodiment (S61). At this time, in S3, the recording power parameter is changed within a predetermined range. If a result better than the predetermined reproduction signal quality is obtained in S61, the recording power parameter setting is terminated. On the other hand, if a good result is not obtained, the recording pulse parameter corresponding to the recording power parameter is changed and set (S62). And it returns to S3 of the flowchart shown in FIG.

  As described above, by changing the recording pulse parameter corresponding to the recording power parameter to be changed based on the result of the trial writing by setting the recording power parameter, the recording power parameter and recording with higher accuracy can be obtained. Pulse parameters can be set.

  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, it is desirable to set the recording condition at least once for each track, but it is not always necessary to set it for all tracks, and may be set for each of a plurality of tracks.

  The optical disc apparatus 1 includes a CPU (Central Processing Unit) that is a calculation means for executing instructions of a program (control program, recording condition setting program) that realizes each function of the control unit 20, and a storage means that stores the program. A ROM (Lead Only Memory), a RAM (Random Access Memory) as a storage means for expanding the program, a storage device (storage medium) (not shown) such as a memory as a storage means for storing the program and various data, etc. I have.

  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 for realizing the functions described above, can be read by a computer, the optical disc apparatus 1. This can also be achieved by reading the program code recorded in the recording medium and executing it by the computer (or CPU or MPU). In this case, since the program code itself read from the recording medium realizes the above-described function, the recording medium on which the program code is recorded constitutes the present invention.

  The control program of the present embodiment is a control program for operating the above-described optical disc apparatus 1, and causes a computer to function as each of the means described above.

  Therefore, it is possible to provide a control program that causes a computer to function as each of the above-described means.

  Further, the computer-readable recording medium of the present embodiment is a recording medium of the control program described above.

  Therefore, it is possible to provide a computer-readable recording medium in which the control program is recorded.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Embodiments to be described are also included in the technical means of the present invention.

  The optical recording condition setting method of the optical recording / reproducing apparatus of the present invention is a method for setting the optical recording condition of an optical recording / reproducing apparatus that performs optical modulation recording based on the recording condition corresponding to the recorded information and reproduces the recorded information. In the method, it is preferable to change the recording power parameter for the shortest recording mark, perform test writing on the optical recording medium, reproduce the test writing, and select a recording power parameter that improves the reproduction signal quality.

  Further, the optical recording / reproducing apparatus of the present invention performs optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information, and sets the recording power parameter for the shortest recording mark. Individual recording power trial writing means for performing trial writing on the optical recording medium by changing, reproduction signal quality detecting means for reproducing the trial writing by the individual recording power trial writing means, and detecting reproduction signal quality, and reproduction signal quality It is preferable that a selection means for selecting a recording power parameter for improving the recording power parameter is provided.

  Note that the recording power parameter is a parameter related to power such as recording power, erasing power, and bias power shown in FIG. 3, but may be one of these parameters or a plurality of parameters.

  According to the above invention, when the recording power parameter that improves the reproduction signal quality is selected, the recording power parameter for the shortest recording mark is changed.

  That is, the shorter the mark length, the smaller the number of parameters to be changed in the recording power parameter, and the more difficult it is to set the recording power parameter for forming a recording mark with good reproduction signal quality. In addition, as the mark length is shorter, the appearance frequency increases in the data. Therefore, the shorter the mark length, the higher the influence on the entire mark and the more precise the setting.Therefore, by setting the recording power parameter for the shortest mark length better, the overall reproduction signal quality can be improved. large. As a result, if a recording power parameter that improves the reproduction signal quality is selected for the shortest recording mark, the influence of variations in characteristics of the writable optical disc and the optical recording / reproducing apparatus can be reduced with respect to the entire reproduction signal quality. it can.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

  Further, the optical recording condition setting method of the optical recording / reproducing apparatus is an optical recording condition setting method of the optical recording / reproducing apparatus that performs optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information. After performing trial writing by changing the recording power parameter for the recording mark and determining the recording power parameter for the recording mark that provides good reproduction signal quality, the recording power parameter for the shortest recording mark is changed to It is preferable that test writing is performed on the recording medium, the test writing is reproduced, and a recording power parameter that improves the reproduction signal quality is selected.

  Also, the optical recording / reproducing apparatus of the present invention performs a change in the recording power parameter for the recording mark in the optical recording / reproducing apparatus that performs the optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information. In addition, recording power test writing means for performing test writing, test writing by the recording power test writing means, recording power determination means for determining recording power parameters for the recording marks, and recording determined by the recording power determination means Among the power parameters, the recording power parameter for the shortest recording mark is changed, and the individual recording power trial writing means for performing trial writing on the optical recording medium and the trial writing by the individual recording power trial writing means are reproduced and the reproduction signal is reproduced. Reproduction signal quality detection means for detecting quality and the shortest recording mark that improves reproduction signal quality It is preferable that a selection means for selecting a recording power parameters.

  According to the above invention, first, the recording power parameter for each mark length is determined, and then the recording power parameter for the shortest mark length that improves the reproduction signal quality is selected. As a result, it is possible to optimize parameters for the recording power of all mark lengths. Further, it is possible to select the recording pulse parameter of the shortest mark that improves the reproduction signal quality in a state where the recording power parameters other than the shortest mark are fixed.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

  Further, the optical recording condition setting method of the optical recording / reproducing apparatus is an optical recording condition setting method of the optical recording / reproducing apparatus that performs optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information. Change the recording power parameter for the shortest recording mark, perform test writing on the optical recording medium, reproduce the test writing, select the recording power parameter that improves the playback signal quality, and then change the recording power parameter for the recording mark. Test writing is performed with a change, and a recording power parameter for the recording mark that can obtain good reproduction signal quality is determined.

  Further, the optical recording / reproducing apparatus of the present invention performs optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information, and sets the recording power parameter for the shortest recording mark. Individual recording power trial writing means for performing trial writing on the optical recording medium by changing, reproduction signal quality detecting means for reproducing the trial writing by the individual recording power trial writing means, and detecting reproduction signal quality, and reproduction signal quality Selecting means for selecting a recording power parameter for the shortest recording mark that improves the recording power, and a recording power test for performing test writing by changing the recording power parameter for the recording mark after selecting the recording power parameter that improves the reproduction signal quality The writing means and the trial writing by the recording power trial writing means are reproduced, and the recording power parameter is determined. It is characterized by comprising a recording power determining means.

  According to the above invention, first, the recording power parameter of the shortest mark is selected, and then the recording power parameter for each mark length that improves the reproduction signal quality is determined. As a result, it is possible to optimize parameters for the recording power of all mark lengths.

  For example, when the recording power parameter of the shortest mark is selected, the recording power parameter of the shortest mark is optimum, but it is effective when the level is low when viewed from the whole.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

  Further, the optical recording condition setting method of the optical recording / reproducing apparatus is an optical recording condition setting method of the optical recording / reproducing apparatus that performs optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information. Change the recording power parameter for the shortest recording mark, perform test writing on the optical recording medium, reproduce the test writing, select the recording power parameter that improves the playback signal quality, and then set the recording pulse parameter for the recording mark. It is preferable to perform test writing with a change, and to determine a recording pulse power parameter for the recording mark that can provide good reproduction signal quality.

  Further, the optical recording / reproducing apparatus of the present invention performs optical modulation recording based on the recording condition according to the recording information and reproduces the recorded information, and sets the recording power parameter for the shortest recording mark. Individual recording power trial writing means for performing trial writing on the optical recording medium by changing, reproduction signal quality detecting means for reproducing the trial writing by the individual recording power trial writing means, and detecting reproduction signal quality, and reproduction signal quality Selecting means for selecting a recording power parameter for the shortest recording mark that improves the recording performance, and a recording pulse test for performing test writing by changing the recording pulse parameter for the recording mark after selecting a recording power parameter for improving the reproduction signal quality The writing means and the trial writing by the recording pulse trial writing means are reproduced and the recording pulse parameters are determined. It is preferable that a recording pulse determining means.

  According to the above invention, first, the recording power parameter of the shortest mark is selected, and then the recording pulse parameter for each mark length that improves the reproduction signal quality is determined. As a result, it is possible to optimize parameters for recording pulses of all mark lengths.

  Therefore, it is possible to provide an optical recording condition setting method for an optical recording / reproducing apparatus and an optical recording / reproducing apparatus that can reduce the influence of variations in characteristics of a writable optical disc and the optical recording / reproducing apparatus.

  The present invention sets recording conditions by reading setting information for determining recording conditions stored in a specific area of an optical recording medium such as an optical disc or outputting the setting information from within the apparatus. The present invention can be applied to an optical recording condition setting method, an optical recording / reproducing apparatus, a control program, and a recording medium in which recording conditions are corrected by recording / reproducing in a specific area for which recording is desired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a configuration of an optical disc device according to an embodiment of an optical recording pulse condition setting method for an optical disc device according to the present invention. It is a perspective view which shows the optical disk in which information is recorded by the said optical disk apparatus. It is a timing chart explaining the setting of the pulse train corresponding to recording information. (A)-(c) is a timing chart explaining the parameter for setting the pulse train and recording pulse conditions for forming each recording mark. It is a graph which shows the jitter measurement result in the said optical recording condition setting method. It is a flowchart which shows the said optical recording condition setting method. It is a flowchart which shows other embodiment of the optical recording condition setting method in this invention. It is a flowchart which shows other embodiment of the optical recording condition setting method in this invention. It is a flowchart which shows other embodiment of the optical recording condition setting method in this invention. It is a flowchart which shows other embodiment of the optical recording condition setting method in this invention. It is a flowchart which shows other embodiment of the optical recording condition setting method in this invention. It is a graph which shows the jitter measurement result in the said optical recording condition setting method. It is a graph which shows the jitter measurement result in the said optical recording condition setting method. It is a graph which shows the jitter measurement result in the said optical recording condition setting method. It is a graph which shows the jitter measurement result in the said optical recording condition setting method. It is a flowchart which shows other embodiment of the optical recording condition setting method in this invention.

Explanation of symbols

1 Optical disk device (optical recording / reproducing device)
10 Optical disc (optical recording medium)
12 pickup 16 recording / reproducing circuit group 20 control unit (individual recording power test writing means, reproduction signal quality detecting means, selecting means,
Recording power trial writing means, recording power determining means, recording pulse determining means)
30 Sensor 41 Setting area

Claims (15)

In an optical recording condition setting method of an optical recording / reproducing apparatus for performing optical modulation recording based on a recording condition corresponding to recording information and reproducing the recorded information,
After changing the recording pulse parameter for the recording mark with respect to the total mark length and performing test writing, and determining the recording pulse parameter for the recording mark with respect to the total mark length to obtain good reproduction signal quality,
The recording power parameter for the shortest recording mark is changed, test writing is performed on the optical recording medium, the test writing is reproduced, and the recording power parameter that improves the reproduction signal quality is selected. An optical recording condition setting method for an optical recording / reproducing apparatus. After selecting the recording power parameter for the shortest recording mark, the recording power parameter for the mark length is changed from the shorter mark length, the test writing is performed on the optical recording medium, the test writing is reproduced, and the reproduction signal is reproduced. 2. The optical recording condition setting method for an optical recording / reproducing apparatus according to claim 1, wherein the process of selecting a recording power parameter with improved quality is performed at least once . Before selecting the recording power parameter for the shortest recording mark, the recording power parameter for the shortest recording mark used for test writing on the optical recording medium is changed within a predetermined range, and the recording power parameter is good within the predetermined range. when the recording power parameters for recording mark shortest reproduced signal quality can be obtained is not obtained, wherein for causing the recording pulse parameter corresponding to the recording power parameters for recording mark of the shortest is changed by a predetermined change amount Item 4. A method for setting optical recording conditions of an optical recording / reproducing apparatus according to Item 1 . Decrease the recording pulse parameter corresponding to the recording power parameter for the shortest recording mark based on the result of trial writing on the optical recording medium so as to reduce it when the corresponding recording power parameter is likely to be too large 4. The method of setting an optical recording condition of an optical recording / reproducing apparatus according to claim 3, wherein if it is too much, the optical recording / reproducing apparatus is changed to prevent the deterioration . Good reproduction signal when a predetermined amount of change is given to the recording pulse parameter corresponding to the recording power parameter for the shortest recording mark within the range of the amount of change of the recording power parameter for the shortest recording mark used for test writing 5. The optical recording condition setting method for an optical recording / reproducing apparatus according to claim 3, wherein the optical recording condition is set based on a value of a recording power parameter for obtaining quality . In the optical recording condition setting method of the optical recording / reproducing apparatus according to claim 2,
Before selecting the recording power parameter for the mark length, which is changed from the shorter mark length,
When the recording power parameter for the mark length used for test writing on the optical recording medium is changed within a predetermined range, and the recording power parameter for the mark length for obtaining a good reproduction signal quality within the predetermined range cannot be obtained. The method for setting optical recording conditions of an optical recording / reproducing apparatus , wherein a recording pulse parameter corresponding to a recording power parameter for the mark length is changed by a predetermined change amount . Based on the result of trial writing on the optical recording medium, the recording pulse parameter corresponding to the recording power parameter for the mark length is reduced so as to decrease when the corresponding recording power parameter is likely to be too large. 7. The method of setting an optical recording condition for an optical recording / reproducing apparatus according to claim 6 , wherein if it is too large, the optical recording / reproducing apparatus is changed so as to prevent a decrease . The range of the change amount of the recording power parameter with respect to the mark length, which is changed from the shorter mark length used for the test writing, is given to the recording pulse parameter corresponding to the recording power parameter with respect to the mark length. 8. The optical recording condition setting method for an optical recording / reproducing apparatus according to claim 6 , wherein the recording power parameter value is set based on a value of a recording power parameter that provides a good reproduction signal quality . 9. The optical recording condition setting method for an optical recording / reproducing apparatus according to claim 1 , wherein the reproduction signal quality is jitter . 9. The optical recording condition setting method for an optical recording / reproducing apparatus according to claim 1 , wherein the reproduction signal quality is an error rate . In the optical recording medium, recording conditions including a recording power parameter and a recording pulse parameter are stored in advance,
11. The optical recording condition setting method for an optical recording / reproducing apparatus according to claim 1 , wherein the recording condition is read and a recording condition used for trial writing is set based on the recording condition. In an optical recording / reproducing apparatus for performing optical modulation recording based on a recording condition corresponding to recording information and reproducing the recorded information,
Recording pulse trial writing means for performing test writing by changing the recording pulse parameters for recording marks for all mark lengths;
Recording pulse determining means for reproducing the test writing by the recording pulse test writing means, and determining recording pulse parameters for the recording marks for all the mark lengths;
Of the recording pulse parameters determined by the recording pulse determining means, the individual recording power test writing means for changing the recording power parameter for the shortest recording mark and performing test writing on the optical recording medium;
Reproduction signal quality detection means for reproducing the trial writing by the individual recording power trial writing means and detecting the reproduction signal quality;
An optical recording / reproducing apparatus comprising: selection means for selecting a recording power parameter for the shortest recording mark with improved reproduction signal quality . The selection means, after selecting the recording power parameter for the shortest recording mark, changes the recording power parameter for the mark length from the shorter mark length, performs test writing on the optical recording medium, and performs test writing. 13. The optical recording / reproducing apparatus according to claim 12 , wherein the process of reproducing and selecting the recording power parameter that improves the reproduction signal quality is performed at least once . 14. A control program for operating the optical recording / reproducing apparatus according to claim 12, wherein the computer functions as each of the means . 15. A computer-readable recording medium on which the control program according to claim 14 is recorded.

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