JP2007250019A - Optical disk recording device and recording method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten an optimum WS setup time and to reduce a use recording area, and also to find a usable WS among target recording speeds without applying the easy reduction in recording speed. <P>SOLUTION: Test-recording of information including two or more kinds of marks to an optical disk is carried out according to a base WS; the test-recorded information is read out and a binary reproduction signal is generated according to the marks and space; it is judged whether or not this satisfies a prescribed value; the base WS is changed when the value is not satisfied; a temporary optimal WS is calculated based on the base WS when satisfied; the test-recording of the information including two or more kinds of marks to the optical disk is performed according to the temporary optimal WS; this information is read out to measure the recording quality, and when the recording quality satisfies the prescribed value, the temporary optimal WS is set up as the optimal WS. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus and a write strategy setting method for recording information on an optical disc.

  In recent years, due to the development of information communication technology, the Internet and the like have been spread at a remarkable speed, so that a lot of information is exchanged over a network. Under these circumstances, in recent years, in the field of information recording apparatuses, a write-once optical disc such as a CD-R and a rewritable optical disc such as a CD-RW have attracted attention as recording media. In recent years, DVD ± R and DVD ± RW have been developed by shortening the wavelength of a semiconductor laser as a laser light source, reducing the spot diameter by a high NA objective lens having a high numerical aperture, and adopting a thin substrate. A large-capacity optical disk such as a DVD-RAM is used in an information recording apparatus.

  Here, recording of information on a CD-R or the like is performed by converting recording information given from a PC (PC: Personal Computer) or the like into an EFM (EFM: Eight to Fourteen Modulation) signal. Due to the difference in the composition of the recording layer, etc., problems such as poor mark formation due to insufficient heat storage and cooling rate of the optical recording medium occur. Even if an EFM signal is recorded as it is, the desired mark or space is formed. I can't do it.

  For this reason, a method is adopted in which a recording parameter unique to each optical disc to be used (hereinafter referred to as a write strategy) is determined with respect to a reference recording waveform to maintain good recording quality. Therefore, for general optical disks that are often used in the market, optimal write processing is performed by storing the write strategy for these known optical disks in advance in the firmware of the optical disk device, and reading and setting this during recording. It is like that. That is, when an optical disc is inserted into the optical disc apparatus, the unique information (disc ID, etc.) of the optical disc is read, and a recording operation is performed in which the manufacturer and model of the optical disc are specified based on this ID information and information is written. .

  However, there are currently a variety of optical discs in the market that are larger than those known by optical disc device manufacturers, and considering the development of new optical discs, it is optimal for all optical discs in the market. It is virtually impossible to prepare a simple write strategy in advance. For this reason, with respect to an unknown optical disk whose write strategy is not stored in the firmware, a recording operation is performed using a standard base write strategy or an optical disk write strategy that is determined to have similar characteristics, for example, a write strategy of the same manufacturer. I was doing it.

  For example, Patent Document 1 or Patent Document 2 describes a conventional technique for automatically setting a write strategy even for an unknown optical disc. Both of them have a mark length and a space length based on a reference write strategy. The edge of the recording pulse is adjusted so as to match. However, these prior arts do not describe how to deal with a case where there is a problem with the initially set base write strategy.

On the other hand, Patent Document 3 describes processing for a case where there is a problem with the initially set base write strategy, although the concept of automatic write strategy setting is different. That is, in this prior art, as shown in FIG. 17, after recording with a provisionally determined write strategy, the quality is measured and compared with a specified value. If the specified value is not satisfied, the write speed is set to one paragraph again. Is set.
JP 2004-355727 A JP 2005-149580 A JP 2005-50411 A

  However, in the prior art of Patent Document 3, it is determined whether or not to use this write strategy for actual recording after setting the provisionally determined write strategy. For this reason, when not used for actual recording, there has been a problem that the write strategy setting time, the recording area, etc. until then are wasted. In addition, when it is determined that it is not used for actual recording, the recording speed is lowered, so that there is a problem that the data writing time becomes long and the performance is deteriorated.

  The present invention solves such problems of the prior art, shortens the optimum write strategy setting time and reduces the recording area used, and adjusts the optimum write strategy by easily reducing the recording speed. An object of the present invention is to provide an excellent optical disc recording apparatus capable of high-speed recording by searching for a usable write strategy at a target recording speed and a recording method therefor.

  In order to solve the above problems, the present invention provides a base write strategy in an optical disc recording apparatus that records information on an optical disc by determining a recording power based on a base write strategy as a reference. The test recording means for test recording information including a plurality of types of marks on the optical disc, and the reproduction signal for reading the information recorded on the optical disc by the test recording means and generating a binary reproduction signal corresponding to the mark and space Generation means, reproduction signal determination means for determining whether or not the reproduction signal generated by the reproduction signal generation means satisfies a specified value, and the reproduction signal determination means determines that the reproduction signal does not satisfy the specified value And a base light strategy changing means for changing the base light strategy when the base light strategy is changed. To.

  According to a second aspect of the present invention, in the optical disc recording apparatus according to the first aspect, when the reproduction signal determining means determines that the reproduction signal satisfies the specified value, the base light strategy is used. An optical disc recording apparatus for calculating an optimum write strategy.

  According to a third aspect of the present invention, in the optical disk recording apparatus according to the first aspect, the reproduction signal determining means measures the number of samples for each signal type of the reproduction signal reproduced by the reproduction signal generating means, and the sample When the number ratio deviates from a specified condition, it is determined that the specified value is not satisfied.

  According to a fourth aspect of the present invention, in the optical disk recording apparatus according to the first aspect, the reproduction signal determining means calculates D2C (Data to Clock) jitter of a predetermined combination of reproduction signals reproduced by the reproduction signal generating means. Measured, and if the jitter value deviates from a specified condition, it is determined that the specified value is not satisfied.

  According to a fifth aspect of the present invention, in the optical disk recording apparatus according to the first aspect, the reproduction signal determining means measures the signal length of each reproduction signal reproduced by the reproduction signal generating means, and this signal A deviation indicating a deviation between the average value by type and the theoretical center value is obtained, and when the deviation is larger than a predetermined value, it is determined that the prescribed value is not satisfied.

  According to a sixth aspect of the present invention, there is provided an optical disc recording apparatus for recording information on an optical disc by determining a recording power based on a base write strategy as a reference, and adding the base write strategy and a predetermined mark of the base write strategy. In accordance with the write strategy to which is added, the test recording means for recording information on the optical disc in the first test recording and the second test recording, and the test recording means reads the information recorded in the first test recording and the second test recording on the optical disc. , Reproduction signal generation means for generating a binary first test recording / reproduction signal and second test recording / reproduction signal corresponding to the mark and space, and D2C of the first test recording / reproduction signal generated by the reproduction signal generation means Deviation and D2C deviation of second test recording / playback signal A unique change amount calculating means for calculating an inherent change amount from the calculated difference, and an inherent change for determining whether the inherent change amount calculated by the inherent change amount calculating means satisfies a specified value. And a base light strategy changing unit that changes the base light strategy when it is determined that the inherent change determined by the inherent change determining unit does not satisfy the specified value.

  According to a seventh aspect of the present invention, in the optical disk recording apparatus according to the first or sixth aspect, the base write strategy changing means determines that the reproduced signal does not satisfy a prescribed value by the reproduced signal determining means Is characterized in that the value of k of the base write strategy (n + k) T is changed.

  According to an eighth aspect of the present invention, in the optical disk recording apparatus according to the seventh aspect, the base strategy changing means reduces the value of k when it is determined that the reproduction signal does not satisfy the specified value. Features.

  According to a ninth aspect of the present invention, in a recording method of an optical disk recording apparatus for recording information on an optical disk by determining a recording power based on a base write strategy as a reference, a plurality of types of marks are recorded on the optical disk according to the base light strategy. Test recording information, reading information recorded on the optical disc, generating a binary reproduction signal corresponding to the mark and space, determining whether the generated reproduction signal satisfies a specified value, When it is determined that the playback signal does not satisfy the specified value, the base write strategy is changed. When it is determined that the playback signal satisfies the specified value, the temporary optimal write is performed based on the base write strategy. Calculate the strategy, test record information including multiple types of marks on the optical disc according to the provisional optimal write strategy, It reads the test information recorded by measuring the recording quality, if the recording quality is satisfied the prescribed value and performs the recording of information by setting a virtual optimum write strategy as the optimal write strategy.

  According to a tenth aspect of the present invention, in the recording method according to the ninth aspect, when the recording quality does not satisfy the specified value, either or both of the recording speed and the recording power are reviewed. Features.

  According to the present invention, it is possible to shorten the setting time of the optimum write strategy and to reduce the used recording area for that purpose. Also, even if the optimal write strategy is not found, it does not deal with easily by reducing the recording speed, but it searches for a usable write strategy within the target recording speed, thus shortening the writing time to the optical disc. be able to. Therefore, according to the present invention, it is possible to provide an optical disk recording apparatus that can absorb individual differences among optical disk recording apparatuses and has high recording quality even for an unknown optical disk whose write strategy is not previously stored in the apparatus main body.

Next, an embodiment of an optical disk recording apparatus and a recording method thereof according to the present invention will be described in detail with reference to the accompanying drawings.
Referring to FIG. 1, there is shown a functional block diagram of an optical disc recording apparatus 2 showing an embodiment of an optical disc recording apparatus according to the present invention. The optical disk 1 is an optical recording medium on which information can be recorded, reproduced, and erased (only RW and RAM) by a semiconductor laser. For example, a CD-R, CD-RW, DVD ± R, DVD-RW, DVD-RAM, etc. is there.

  The optical pickup 200 includes a laser light source such as a laser diode (not shown), an objective lens driven by a collimator lens, a focus actuator or a tracking actuator, an optical component such as a polarization beam splitter, a cylindrical lens, and A, B, C, and D. Are divided into four regions, and a four-divided or two-divided photodetector (PD) for converting light into an electric signal, a front monitor diode for monitoring laser output during recording and reproduction, and the like are provided.

  The head amplifier 202 detects the reflected light (RF signal) from the optical disc 1, calculates the amount of reflected light from the detected reflected light, and generates an RF signal indicating the total amount of reflected light to each area of the 4-divided PD. At the same time, a focus error signal (FE) that is a signal for detecting defocus of the irradiation laser of the optical pickup 2 is generated by the astigmatism method, and a tracking error that is a signal for detecting the track deviation of the irradiation laser of the optical pickup 2 The signal (TE) is generated by the push-pull method.

  The binarization circuit 204 is a reproduction signal generation circuit that forms a detection signal from the head amplifier 202 and generates a binary digital signal corresponding to the mark and space. That is, the binarization circuit 204 outputs analog 3T, 4T, 5T,. . . The thresholds for binarizing the various signals in order to convert them into a beautiful square wave are constantly adjusted.

  The clock shift measurement unit 208 is a measurement unit that measures a determination parameter for determining whether or not to change a reference write strategy (hereinafter referred to as a base write strategy). In other words, the clock shift measuring unit 208 acquires the data from the binarization circuit 204 to measure the shift between the edges of various signals and the clock edges. The clock deviation measuring unit 208 also includes a base write strategy for trial writing in the test area and a mark edge measured when the mark pulse edge when recording with this write strategy + α is moved by a specified amount (ΔT). The amount of change (dT) is measured.

  A RAM 210 is a memory that temporarily stores data measured by the clock shift measuring unit 208. That is, the RAM 210 has a mark edge change amount (dT) measured when the clock deviation of various signals, the number of samples for each signal type, or a specified amount (ΔT) of a reproduction signal recorded with a different write strategy is moved. Remembered.

  The data discriminating / calculating unit 212 is a part that discriminates the data measured by the clock deviation calculating unit 208 for each signal and calculates D2C (Data to Clock) jitter from the deviation amount. That is, the data discriminating / calculating unit 212 calculates a deviation based on the sample number ratio of various signals (at least representative ones of 3T to 14T in the case of DVD) from the measurement data stored in the RAM 210, for example, From the amount of change (dT) in the measured mark edge when calculating the deviation (deviation) of the center, calculating the jitter of various signals, or moving the specified amount (ΔT) of the reproduction signal recorded with a different strategy Calculate the correlation function.

  Further, the data discrimination / calculation unit 212 is a calculation unit that calculates the influence of adjacent edges in various signals from the data measured by the clock shift measurement unit 208. That is, the data discrimination / calculation unit 212 calculates the influence of adjacent edges due to the thermal interference effect.

  The write strategy calculation unit 216 is a calculation unit that calculates a write strategy based on the data discrimination and calculation result of the calculation unit 212. The write strategy calculation unit 216 also stores the calculated write strategy in the write strategy memory unit 218 and reads the stored write strategy. The write strategy calculation unit 216 further reads a base write strategy as a reference calculated by the strategy designer from the ROM 220 and uses it to calculate an optimal write strategy.

  The write strategy memory unit 218 is a memory that temporarily stores the write strategy calculated by the write strategy calculation unit. The ROM 220 is a non-volatile memory in which a base light strategy to be used as a reference is stored. For example, a base light strategy calculated by a strategy designer is stored for each optical disk.

  The decoder 206 is a circuit that converts the binarized signal generated by the binarization circuit 204 into a signal of a desired format and outputs the signal to the controller 222. The controller 222 is a device that supplies a recording signal to the encoder 224 and reads out the recording signal from the decoder 206. The encoder 224 converts the recording signal from the controller 222 into an EFM signal or the like and outputs it to the recording pulse adjustment unit 226.

  The recording pulse adjustment unit 226 receives a write strategy or parameter from the write strategy calculation unit 216, forms a recording pulse train based on the write strategy or parameter, and outputs the recording pulse train to the laser driving unit 228. The laser drive unit 228 generates a pulse signal for driving a laser diode corresponding to the input recording pulse, and supplies this to a semiconductor laser (not shown) in the optical pickup 200.

  FIG. 2 shows an operation flow of a recording method including a determination as to whether or not to continue write strategy setting processing in the optical disk recording apparatus shown in FIG. 1, that is, AWS (Auto Write Strategy) for automatically calculating and setting the write strategy. It is. Hereinafter, the write strategy setting process in the present embodiment will be described with reference to FIG.

  First, trial writing is performed in the test area of the optical disc 1 using the base write strategy stored in the ROM 220 (step S100). Next, the information recorded in the test area is reproduced, and it is determined whether or not the base strategy that has been trial-written is appropriate as a write strategy for executing AWS (step S102). Specifically, in step S102, a parameter for determination is selected, and data for that purpose is acquired.

  It is determined whether or not to continue AWS based on the result of step S102 (step S104). That is, if the evaluation item in step S102 satisfies the specified value, the temporary optimal write strategy is calculated based on the base write strategy in step S100 (step S106). If the specified value is not satisfied, the base light is calculated. The strategy is changed (step S108). If the base write strategy is changed in step S108, the process returns to step S100 and the above process is repeated again. As a method for changing the base write strategy, for example, the write strategy is dynamically changed by changing the mark width of the signal.

  As parameters for determining in step S102, there are comparison of the number of samples in each signal type of reproduction information, D2C jitter (Data to Clock Jitter), or deviation. Before explaining the parameters as judgment materials, first, the principle of AWS will be briefly explained in order to understand the effectiveness of the present invention. The principle of AWS is that the edge position of the recording pulse is adjusted so that the deviation between the edge of each signal and the clock edge in all combinations of marks and spaces is the same.

  Therefore, as a premise for performing AWS, each mark length and space length of the data recorded with the base write strategy must be accurately measured. Discrimination between mark and space types is determined by each signal length. FIG. 3 shows the signal length on the horizontal axis and the frequency on the vertical axis. Depending on the signal length, 3T, 4T, 5T,. . . It is discriminated.

  In FIG. 3, since the distribution of each signal is within a specified window, the average value in the window correctly matches the center value of the distribution. However, if the standard write strategy is wrong or recording is performed with an incorrect recording power, the distribution deviates from the prescribed window as shown in FIG. In such a case, the average value in the window and the center value of the distribution do not match, and the premise of the automatic write strategy setting is lost.

  Therefore, when it comes out of the specified window as shown in FIG. 4, the automatic setting by the base light strategy is immediately stopped, the base light strategy is changed, and the state is set within the specified window, and then the write strategy is changed. Automatic configuration must be started.

  There is a method of comparing the number of samples of each distribution in order to automatically determine whether or not they are within the specified window. For example, in the case of a DVD, the ratio of the number of samples of 3T to 14T signals is approximately as shown in FIG. 5 (of course, the ratio varies depending on the data to be recorded). Therefore, the number of samples in each T window in the reproduction signal trial-written in the test area is measured, and the distribution ratio falls within ± x% of the value in FIG. 5 (x is an allowable error value, for example, 3 to 5). Judgment should be made.

  The determination based on the ratio of the number of samples in each distribution is not the average data shown in FIG. 5, but the signal ratio of the random data of the base strategy that has been test-written in the test area is stored in the ROM 220. It may be used. Also, instead of directly comparing the number of samples, a representative number of signals, for example, 3T, 4T, and 5T only are obtained, the ratio is calculated, and is this value within a specified range? You may decide whether. This method is efficient because it is not necessary to obtain the number of all T samples.

  FIG. 6 is a graph showing a case where a deviation is selected as a determination parameter. As shown in FIG. 6, a deviation that is a deviation from the theoretical center value of each signal distribution is obtained, and if this is large as in 3TM, it is considered that the distribution is out of the specified window, and the base light strategy is corrected. . Further, not only the comparison of deviations but also jitter may be used to check whether the deviation ± 3 × σ (σ: jitter) falls within a specified window.

  Next, a case where D2C jitter is selected as a determination parameter will be described. In a combination of signals in which an nT space comes after the mT mark as shown in FIG. 7, m, n, D2C jitter (Data to Clock Jitter) is used as an index indicating the variation in the amount of deviation between the trailing edge after the mT mark and the clock. ) This jitter takes a very stable value regardless of the base strategy or recording power because both sides of the target edge are fixed with fixed marks and spaces.

  The graph of FIG. 8 is obtained by measuring the D2C jitter of 3TS-3TM when recording on a DVD-R disc while changing the base write strategy and the recording power, and the horizontal axis is the beta (β) value. This beta value will be described with reference to FIG. FIG. 9 shows the peak (Peak) and bottom (Bottom) of the RF signal, where the height from the reference ref to the peak is A1, and the height from the ref to the bottom is A2, the beta β value Can be expressed by the following equation using the recorded RF signal.

    β (%) = {(A1−A2) / (A1 + A2)} × 100

  When recording is performed while changing the base write strategy and recording power, the tendency is usually as shown in the graph of FIG. 8, but when the recording speed is high, heat flows from a mark with a space as shown in FIG. The D2C jitter is abruptly deteriorated due to the thermal interference effect caused by. The point of this deterioration depends on the base strategy as shown in the graph of FIG. 11, and the power margin tends to become wider as the value of k of the base strategy (n + k) T is reduced.

  The graph of FIG. 11 is obtained by measuring the 3TS-3TM D2C jitter of a CD-R disc recorded with a different base write strategy and recording power. From this graph, it can be seen that the jitter deterioration β value varies depending on the base write strategy. FIG. 12 is a graph showing the jitter value at β = 5% in FIG. From FIG. 11, it can be understood that when β = 5%, the jitter value varies greatly depending on the base write strategy.

  In this way, after recording with the base write strategy, all (specific) combinations of D2C jitter are measured, and when this jitter value deviates from the specified condition, automatic setting of the write strategy is stopped. Then, as shown in step S108, an optimum write strategy can be determined only after the base write strategy is fundamentally reviewed. In general, when changing the base write strategy, it is better to move it in the direction of decreasing the value of k in (n + k) T (in the direction of increasing the strategy reduction rate).

  Returning to FIG. 2, when the temporary optimal write strategy is calculated based on the base write strategy in step S106, trial writing is again performed in the test area using the calculated temporary optimal write strategy (step S110). Then, the trially written information is reproduced, and the recording quality is measured (step S112). As a result, if the recording quality does not satisfy the specified value, the recording speed or recording power is reviewed (step S116), and the process returns to step S100. On the other hand, if the recording quality satisfies the specified value, the actual information is recorded on the optical disc 1 using the temporary optimal write strategy as the optimal write strategy (step S118).

FIG. 13 shows an operation flow when another write strategy setting process in the optical disk recording apparatus shown in FIG. 1, that is, an AWS continuation determination based on the inherent change amount is performed.
One method for increasing the write strategy setting accuracy is to determine the rate of change of each mark by actual measurement. As shown in FIG. 14, the inherent change amount indicates a coefficient obtained by dT / ΔT from the change amount (dT) of the measured mark edge when a specific mark pulse edge is moved by a specified amount (ΔT). Yes.

In a normal case, this inherent change amount hardly changes. However, an abnormal value may be taken depending on the setting of the base light strategy. This is because the heat of the next mark is affected by the thermal interference effect through the adjacent space as shown in FIG.
For example, in CD-R 8 × recording, when the base write strategy is set to (n−0.5) T and the 3T mark width is changed, the inherent change amount changes as shown in FIG. As shown in FIG. 16, when the 3T mark becomes too long, it is understood that the inherent change amount takes an abnormal value due to the influence of thermal interference from the rear mark.

  Based on the above description, returning to FIG. 13, the base write strategy (1) and the base write strategy plus α (2) obtained by adding a specific mark of the base strategy are written in the test area of the optical disc 1. (Steps S200 and S202). Next, the written information is reproduced, D2C deviation for each strategy is obtained, and the difference (dT) is calculated to obtain the inherent change amount (step S204). As a result, when the inherent change amount deviates from the prescribed condition (when the prescribed value is not satisfied), the base light strategy is changed (step S210) and the process returns to step S200.

  On the other hand, if the specified value is satisfied, a temporary optimal write strategy is calculated based on the base write strategy set in step S200 (step S208). Since steps S208 to S220 are the same as steps S106 to S118 in FIG.

  Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, and variations or modifications in the same technical idea as the present invention are not limited to the above embodiments. Included in the category. That is, the present invention pays attention to the fact that the optimum write strategy cannot be calculated unless the base write strategy for performing OPC satisfies a predetermined specified value. Therefore, in the present embodiment, for example, a case where the mark width of the signal is changed when the specified value is not satisfied has been described as an example. However, the present invention is not limited to the width, and the mark shape or the like is changed. Also good.

The functional block diagram which shows embodiment in the optical disk recording device by this invention. The operation | movement flow which shows embodiment of the recording method in the optical disk recording device by this invention. The graph which showed the ideal distribution in each signal when a horizontal axis is signal length and a vertical axis | shaft is made into frequency. The graph which showed the distribution when the write strategy is incorrect or the recording power is not appropriate in each signal when the horizontal axis is the signal length and the vertical axis is the frequency. The table | surface which showed the signal sample ratio of standard 3T-14T in DVD. The graph which showed the deviation | shift amount (deviation) from various signal distribution when a horizontal axis | shaft is signal length and a vertical axis | shaft is frequency, and the variation degree (jitter). The figure which showed the combination of the signal which nT space comes after mT mark. The graph which measured D2C jitter of 3TS-3TM what recorded on a DVD-R disc by changing base write strategy and recording power. The wave form diagram of RF signal for demonstrating (beta) value. Explanatory drawing which showed a mode that D2C jitter deteriorated rapidly by the heat interference effect by heat inflow from the mark which pinched | interposed the space. The graph which measured D2C jitter of 3TS-3TM what recorded on a CD-R disc, changing base write strategy and recording power. In the graph of FIG. 11, the graph which showed the jitter value in (beta) = 5%. The operation | movement flow which shows other embodiment of the recording method in the optical disk recording device by this invention. Explanatory drawing of the coefficient (specific variation | change_quantity) calculated | required from the variation | change_quantity (dT) of a mark edge measured when a specific mark pulse edge is moved by regulation amount ((DELTA) T). Explanatory drawing which showed the thermal interference effect which the heat | fever of the next mark influences through the adjacent space. The graph which showed the change of the intrinsic | native variation | change_quantity when the base strategy was set to (n-0.5) T and the width | variety of 3T mark was changed in CD-R 8 time speed recording. The operation | movement flow which shows the recording method in the optical disk recording device of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2 Optical disk recording device 200 Optical pick-up 202 Head amplifier 204 Binarization circuit 206 Decoder 208 Clock shift measuring part 210 RAM
212 Data discrimination and calculation unit 216 Write strategy calculation unit 218 Write strategy memory unit 220 ROM
222 Controller 224 Encoder 226 Recording pulse adjustment unit 228 Laser drive unit

Claims (10)

In an optical disc recording apparatus that records information on an optical disc by determining recording power based on a base write strategy as a reference,
Test recording means for performing test recording of information including a plurality of types of marks on the optical disc according to the base write strategy;
Reproduction signal generation means for reading information recorded on the optical disc by the test recording means and generating a binary reproduction signal corresponding to the mark and space;
Reproduction signal determination means for determining whether the reproduction signal generated by the reproduction signal generation means satisfies a specified value;
An optical disc recording apparatus comprising: a base write strategy changing unit that changes the base write strategy when the playback signal determining unit determines that the playback signal does not satisfy a specified value.   2. The optical disc recording apparatus according to claim 1, wherein when the reproduction signal determining unit determines that the reproduction signal satisfies a specified value, an optimum write strategy is calculated based on the base write strategy. An optical disk recording apparatus characterized by the above.   2. The optical disk recording apparatus according to claim 1, wherein the reproduction signal determination unit measures the number of samples for each signal type of the reproduction signal reproduced by the reproduction signal generation unit, and the sample number ratio deviates from a specified condition. In this case, the optical disk recording apparatus is characterized in that it is determined that the specified value is not satisfied.   2. The optical disk recording apparatus according to claim 1, wherein the reproduction signal determination unit measures D2C (Data to Clock) jitter of a predetermined combination of reproduction signals reproduced by the reproduction signal generation unit, and the jitter value is defined. An optical disk recording apparatus characterized by determining that the specified value is not satisfied when the condition is not satisfied. The optical disk recording apparatus according to claim 1, wherein the reproduction signal determination unit includes:
The signal length for each signal type of the reproduction signal reproduced by the reproduction signal generating means is measured, and a deviation indicating a deviation between the average value for each signal type and the theoretical center value is obtained, and this deviation is larger than a predetermined value. In this case, the optical disk recording apparatus is characterized in that it is determined that the specified value is not satisfied. In an optical disc recording apparatus that records information on an optical disc by determining recording power based on a base write strategy as a reference,
Test recording means for causing information to be recorded on the optical disc in a first test recording and a second test recording in accordance with the base write strategy and a write strategy obtained by adding an addition to a predetermined mark of the base write strategy;
The test recording means reads the first test recording and the second test recorded information on the optical disc, and outputs binary first test recording / reproducing signal and second test recording / reproducing signal corresponding to the mark and space. Reproduction signal generating means for generating,
The difference between the D2C deviation of the first test recording / playback signal generated by the playback signal generating means and the D2C deviation of the second test recording / playback signal is calculated, and the inherent change amount is calculated from the calculated difference. Means,
An inherent change amount determining means for determining whether or not the inherent change amount calculated by the inherent change amount calculating means satisfies a specified value;
An optical disc recording apparatus comprising: a base write strategy changing unit that changes the base write strategy when it is determined that the inherent change determined by the inherent change determining unit does not satisfy a specified value.   7. The optical disc recording apparatus according to claim 1, wherein the base light strategy changing unit determines that the base light strategy is changed when the reproduction signal determining unit determines that the reproduction signal does not satisfy a specified value. (N + k) An optical disk recording apparatus characterized by changing a value of k of T.   8. The optical disk recording apparatus according to claim 7, wherein the base strategy changing means reduces the value of k when it is determined that the reproduction signal does not satisfy a specified value. . In a recording method of an optical disk recording apparatus for recording information on an optical disk by determining a recording power based on a base write strategy as a reference,
According to the base write strategy, information including a plurality of types of marks is recorded on the optical disc as a test,
Read the information recorded on the optical disc as a test, and generate a binary reproduction signal corresponding to the mark and space,
Determining whether the generated reproduction signal satisfies a specified value;
When it is determined that the reproduction signal does not satisfy the specified value, the base light strategy is changed,
When it is determined that the reproduction signal satisfies a specified value, a temporary optimal write strategy is calculated based on the base write strategy,
According to the provisional optimum write strategy, information including a plurality of types of marks on the optical disc is test-recorded, and the recording quality is measured by reading the information recorded on the test,
A recording method for an optical disc recording apparatus, wherein when the recording quality satisfies a specified value, information is recorded by setting the provisional optimal write strategy as an optimal write strategy.   10. The recording method according to claim 9, wherein when the recording quality does not satisfy a specified value, one or both of the recording speed and the recording power is reviewed. Method.

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