JP2007035107A - Optical disk recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk recording apparatus without securing a period of time required for test writing specially by repeating alternately recording of data and processing operation of test writing. <P>SOLUTION: Data to be recorded in a data area is stored in a memory 108 while test writing for a test writing area of an optical disk is performed, recording of data for the data area and test writing for the test writing area are performed alternately. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical disc recording apparatus, and more particularly to an optical disc recording apparatus that improves the recording quality by accurately setting an optimum recording power during recording.

  Since a general DVD recorder currently being developed has a higher recording speed for optical discs than the transfer speed of the input data, the input data temporarily stored in the memory is recorded and then recorded. Minutes of data are cleared from the memory, and recording is interrupted and waits until data is again stored in the memory.

  This is not limited to a DVD recorder, and the same applies to, for example, recording video data directly on an optical disk without saving it on a hard disk or the like when performing TV recording on a PC. Even if two optical disk recording devices are used, one is used for reading, the other is used for recording, and the read data is copied without being stored in the hard disk, the reading speed and the recording speed are different. The same thing can happen.

  Thus, when the data recording speed is faster than the data input speed, the data input is interrupted until the data is stored in the memory, and the data recording is interrupted during the data input. It becomes. Therefore, the time for inputting data to the optical disc and the time for storing data in the memory alternately exist.

  Incidentally, there is OPC (Optimum Power Control) as means for determining an optimum laser output value at the time of recording. This is because an area PCA (Power Calibration Area) where trial writing is performed in addition to the data recording area is provided, trial writing is performed while changing the laser output, and the data of the portion where the trial writing has been performed is read, whereby an optimum laser for the optical disc is read. Determine the output value of.

  Usually, in order to perform recording on different portions of a layer in a two-layer type optical disc, trial writing is performed in PCA in each layer. If it is necessary to record across layers at this time, trial writing to the layer to be recorded is generally completed until recording for the current layer is completed and recording for the next layer is started. It is an interval. During this interval, data input from the outside is temporarily stored in the memory, so that all input information is not lost.

  However, when the OPC takes a long time due to the failure of the OPC, the data cannot be stored in the memory, and the optimum laser output value cannot be determined. Here, when the received data is in a streaming format, as in a DVD recorder, for example, it is impossible to obtain the same data again, so it is optimal when such a phenomenon occurs. There is a problem that the recording quality is deteriorated because the recording must be performed with the output value of the laser without guarantee.

As a method for determining the optimum recording power in a conventional optical disc recording / reproducing apparatus, Patent Document 1 discloses a data area for recording information on each layer of a recording surface having a multilayer structure and an optimum light emission power of a laser beam when recording information. When recording information on an optical disc in which test writing areas used for determining the recording power value are provided at different positions, the test writing of recording power is performed in the test writing area in the same layer as the data area for recording information. To obtain the optimum recording power value.
JP 2000-31346 A

  In an optical disk such as a DVD, the storage capacity can be increased by providing two or more recording layers. Further, recording and reproduction can be performed by performing access from one side and focusing the light beam of the optical head (pickup) on each layer. As a result, large capacity recording / reproduction can be performed without turning the disc over. For DVD, a read-only type dual-layer disc has been widely used for some time. Recently, DVD + R DL (Double Layer) having a recording capacity equivalent to this has been put into practical use. In the DVD + R DL format, the OTP format is used. In the case of OTP, Layer 0 (the recording layer on the laser irradiation surface side) is moving in the spiral direction from the inner periphery to the outer periphery as usual, but in Layer 1, the spiral direction is from the outer side to the inner side. Is performed from the outer periphery toward the inner periphery.

  Even if OPC (Optimum Power Control) is performed in the test writing area PCA in the inner periphery, the recording start position is from the outer periphery, so that the recording quality may be deteriorated due to the difference in the optimum laser output value for the medium. Therefore, in order to ensure high recording quality in the entire optical disc, OPC may be performed in both the inner peripheral portion and the outer peripheral portion.

  Conventionally, recording on a certain layer is performed from the inner periphery toward the outer periphery, all the recording on that layer is performed, OPC is performed on the outer periphery, and then recording on the next layer is started. However, in that method, if the OPC performed in the middle fails, the memory becomes full, there is no time to retry, and the optimal laser output value cannot be determined by the OPC, so the laser output value in the previous OPC However, there was a problem that it was not possible to ensure high recording quality at the outer periphery.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide an optical disc recording apparatus that does not need to ensure the time required for trial writing by alternately repeating data recording and trial writing processing operations. Objective.

  In order to achieve the above object, an optical disk recording apparatus according to claim 1 comprises a laser light source for recording information on each layer of an optical disk having a multi-layered recording surface, and a pickup for moving the laser light source to a predetermined position. In the optical disk recording apparatus, the first storage means for storing data to be recorded in the data area of the optical disk, the second storage means for interrupting the recording of data in the data area and storing the recording interruption position, and the data The recording of data in the area is interrupted, the laser light source is moved to the trial writing area, the trial writing means for performing the trial writing, and the third storage means for storing the interruption position when the trial writing by the trial writing means is interrupted And a measuring means for measuring the current position of the pickup, and the first storage means stores data while the trial writing is being performed on the trial writing area by the trial writing means. To store the data to be recorded on data area, and performs a trial writing in a recording and test writing area of the data to the data area alternately.

  From the above configuration, the waiting time when the pickup is not recording is spent on trial writing, so it is not necessary to secure the time required for trial writing, and even if trial writing fails, trial writing is performed at the same time as recording. Thus, the trial writing can be retried at the same timing as in the prior art, and the possibility that the optimum output value cannot be obtained can be greatly reduced.

  The invention according to claim 2 is the optical disk recording apparatus according to claim 1, wherein the time required for the pickup to reciprocate from the current position of the pickup obtained by the measuring means to the test writing area and the first storage means A comparison means for comparing the time for storing data, and when the time required for the pickup to reciprocate by the comparison means is shorter than the longest time for which data can be stored in the first recording means The test writing is performed in the test writing area of the layer currently recording or another layer.

  From the above configuration, it is possible to prevent data loss such as exceeding the allowable amount of memory while the pickup reciprocates between the recording interruption position and the test writing area.

  The invention according to claim 3 is the optical disk recording apparatus according to claim 1 or 2, wherein the trial writing means is configured to perform the test writing once as the pickup approaches the innermost or outermost part of the optical disk. The ratio of the time required for trial writing is increased.

  With the above configuration, the time required for the trial writing to the trial writing area can be changed from a waiting time that differs depending on the recording position of the pickup.

  The invention according to claim 4 is the optical disk recording apparatus according to any one of claims 1 to 3, wherein the test writing means calculates the position of the pickup on the optical disk and the time required for assignable test writing. It has a plurality of tabulated data as one set, and has a selection means capable of selecting a pickup position and an assignable test writing time from the tabulated data.

  From the above configuration, the laser output value can be determined as a practically optimal value from the aggregated data.

  The invention according to claim 5 is the optical disk recording apparatus according to claim 4, wherein the test writing means is a position of the test writing according to a combination of the data recording speed to the first storage means and the rotation speed of the optical disk. It can be changed.

  From the above configuration, the optimum laser output value for the next layer is determined during recording on the current layer by adjusting the recording position for trial writing, and then recording from the current layer to the next layer is performed. Can be done immediately.

  A sixth aspect of the present invention is the optical disk recording apparatus according to any one of the first to fifth aspects, further comprising time measuring means for measuring a time required to record data in the data area, and the time measurement The recording position is calculated from the recording elapsed time obtained by the means, and the current position of the pickup is specified.

  With the above configuration, the time required for the trial writing to the trial writing area can be changed from a waiting time that differs depending on the recording position of the pickup.

  According to the present invention, by performing test writing at a time when the pickup does not record, it is not necessary to secure the time required for test writing again. Test writing can be performed.

Next, the present embodiment will be described with reference to the drawings.
FIG. 1 is a diagram showing the configuration of an optical disk recording apparatus. In this embodiment, a DVD + R will be described as an example.
An optical disk recording apparatus 100 includes a rotary motor 101, a disk 102, an optical system 103, a laser light source 104, a position sensor 105, a power control unit 106, a test writing unit 107, a memory 108, a recording power setting unit 109, a selection unit 110, and a controller 111. The timer 112 is constituted.

  The optical disk 102 is rotated by a rotary motor 101, and the optical system 103 realizes focusing servo, tracking servo, and tilt (tilt) control by servo means (not shown), and a light beam is irradiated on a recording film of the disk 102 by a laser light source 104. The light is condensed to form a recording mark. Further, it is movable in the radial direction of the optical disc 102 and can access a test writing area PCA and a user data area provided in advance on the optical disc 102.

  A laser light source 104 is mounted on the optical system 103. In general, a semiconductor laser (LD: Laser Diode) is used. The laser light source 104 is modulated by an input pulse signal into a predetermined recording power state by a power control unit 106. The laser is modulated between the recording power state and the space power state, so that a recording mark and a portion other than that are formed on the recording film. When this is reproduced, a difference in reflectance occurs, and the information signal can be reproduced. A pickup is used for the optical system 103.

  In an optical disc such as a DVD + R, a wobble signal is recorded in advance in a recording groove (groove) so that position (address) information in the optical disc surface can be known before data recording. As a modulation method of a wobble signal, for example, a phase modulation method is used for DVD + R / RW, and a frequency modulation method is used for CD-R / RW. Address information called ADIP (Address In Pre-groove) is demodulated from the wobble signal by address detection means (not shown). As a result, recording and reproduction can be performed by moving the pickup to an arbitrary position within the optical disk surface. Note that a physical address of a DVD is generally referred to as PSN (Physical Sector Number), and the address is hereinafter referred to as PSN.

  Another important role of the wobble signal is clock generation means (not shown). The wobble signal is binarized, a clock synchronized with the disk position is generated by a PLL (Phase Lock Loop) circuit, and supplied to the controller 111 and an encoding circuit (not shown).

  The recording mark is a pit (hole) in an irreversible organic dye medium such as DVD + R, and the other place is called a space.

  The recording power setting unit 109 drives an LD driver (not shown) according to the recording power setting unit 109 input from the controller 111, and causes the power control unit 106 to emit the laser with power controlled by the power control unit 106. In OPC, the test writing mode is set, and the recording power is sequentially changed. The recording data is encoded and modulated in a predetermined format by an encoder circuit, and is output as a recording data string in a serial format. The pulse width may be fixed, but is generally set by the controller 111 according to the linear velocity and the disc type. This is because the difference in sensitivity for each recording mark length depending on the linear velocity and disc type can be absorbed.

  The disc type is detected by a media type (not shown) from a reproduction signal when the optical system 103 reproduces a specific place on the disc. For example, if the disc manufacturer can be identified by some method, this type may be classified by manufacturer, or even if the same manufacturer can be further classified. As another type identification method, for example, various parameters embedded in advance in the disc can be used. For example, when a recommended power or a pulse width is embedded, it may be used.

  This makes it possible to set the optimum pulse width (Write Strategy) according to various recording films from the same manufacturer. In general, in order to cope with various disk manufacturers, the optical disk recording apparatus 100 often stores a write strategy table optimized for each disk in a non-volatile memory.

Next, test writing will be described.
The test writing is an operation in which the recording power is sequentially changed at a certain linear velocity, and thereafter, the recorded portion is reproduced to evaluate the recording state, and the recording power to obtain the optimum recording state is determined. Called Power Control).

  In the optical disc recording apparatus 100 shown in FIG. 1, recording can be performed by changing the power sequentially by the recording power setting unit 109 in accordance with a command from the controller 111. In general, the area where test writing is performed is often a PCA area (PCA: Power Calibration Area) on the inner periphery rather than the Lead-IN area. In the case of DVD + R, there is a PCA area called an Inner Disc Test Zone in the inner circumference and a PCA area called an Outer Test Zone in the outer circumference, but the inner circumference is generally used.

  After recording on the PCA, the same place is reproduced by the optical system 103 to obtain a reproduction signal RF. The optimum recording state can be evaluated by evaluating appropriate parameters of the RF signal. For example, the β value detecting means measures a parameter that becomes β.

  The β value detection means removes the low frequency component of the RF signal (AC coupling) and detects the upper envelope level a and the lower envelope level b. As shown in FIG. 2, it is assumed that the reflectance of the recording mark portion is lowered as a characteristic of the recording film, and the RF signal is low at the low reflection portion. The RF signal AC-coupled in the proper recording state is vertically symmetrical as shown in FIG. 2A and a = b.

  Further, when the recording power is excessive, the recording mark becomes long as shown in FIG. 2B. Therefore, when AC coupling is performed, the upper level becomes high and a> b. Further, when the recording power is insufficient, the recording mark is shortened as shown in FIG. 3C. Therefore, when AC coupling is performed, the lower level increases and a <b.

The amount obtained by normalizing the difference between a and b by the RF amplitude a + b is β,
β = (a−b) / (a + b).
When β is large, power is excessive, and when β is small, power is insufficient. The optimum power is when β reaches a certain value (for example, 4%), and this β is called βtarget. OPC sequentially records with varying power and evaluates the β value to determine the power when βtarget.

  FIG. 3 shows a graph recorded by changing the recording power in 10 steps. The range in which the recording power is applied is referred to as an OPC range, and the central power serving as a reference at this time is referred to as Pind. For example, the OPC range may be shaken in 10 steps within a range of + 30% and −30% with respect to the Pind, or may be shaken with 1 mW in a range of +5 mW and −4 mW with respect to the Pind.

  A β curve curve (second order) is approximated from the obtained β values of 10 points to obtain a power Popc as β target. Since Popt may fluctuate somewhat depending on conditions at the time of executing OPC such as temperature change, it is desirable to obtain Popc as close to Pind as possible under normal conditions. In addition, since Popc is often different for each disk, it is often set together with Write Strategy for each disk type.

  FIG. 4 shows an explanation of a DVD + R medium having two recording layers. The first layer in the layer direction from the laser irradiation direction (downward direction of the optical system 103 in FIG. 1) is referred to as Layer 0 (L0), and the second layer is referred to as Layer 1 (L1).

  First, in a dual-layer DVD-ROM disc that is a read-only disc, two types of recording formats are used: PTP (Parallel Track Path) shown in FIG. 4 and OTP (Opposite Track Path) shown in FIG. In PTP, the spiral direction of both Layer 0 and Layer 1 is from the inside to the outside (the pickup moves from the inside to the outside if left untracked). In OTP, Layer 0 is the same as PTP, but in Layer 1, the spiral direction is from the outside to the inside (the pickup moves from outside to inside if left tracking).

  Of these, the OTP method is used for two layers of DVD + R for recording (hereinafter, DL: Double Layer). In OTP, there is a Lead-IN in the inner periphery of Layer 0, a Lead-Out in the inner periphery of Layer 1, and a region called Middle Zone in the outer periphery. If there is no data at the end of the data area, there may be a problem when accessing the boundary, so a middle zone that is a buffer area is provided. The PCA area where OPC is performed is allocated in the inner drive area on the inner periphery from Lead-IN.

  In the case of the OTP system, as shown in FIG. 5, Layer 0 recording is performed from the inner periphery to the outer periphery in the same manner as a conventional single-layer DVD + R, but Layer 1 starts recording from the outer periphery. , Gradually record in the inner circumference. Therefore, when recording is started at the outermost layer of Layer 1 after executing OPC at the inner peripheral portion of Layer 0, there may be a deviation from the optimum recording power. In general, the power required at the outer peripheral portion is large, and thus the power is often added.

  In particular, in the case of a two-layer medium, it is very difficult to make the film characteristics of the entire layer uniform from the innermost circumference to the outermost circumference as compared with a single-layer medium. This is particularly noticeable in Layer 1, and generally the outermost recording power requires a higher power than the inner periphery. This is considered to be due to changes in laser light emission due to birefringence of the media, the influence of astigmatism of the optical pickup, and warpage (tilt) of the media. Therefore, there is a problem in that the optimum recording power difference varies depending on the drive and media.

Therefore, there is a method of correcting the optimum power for the outer peripheral portion by performing OPC in the outer peripheral PCA.
As the processing procedure, as shown in the flowchart of FIG. 6, the optimum recording power in Layer 0 is obtained by OPC in the inner peripheral portion PCA in Layer 0 (step S100). Then, recording is performed from the inner periphery to the outer periphery of Layer 0 (step S101). After finishing the recording of Layer 0 to the outermost periphery, the optical disc recording apparatus 100 starts to store data in the memory 108. In the meantime, OPC of Layer 1 is performed in the outer peripheral portion PCA (step S102), and then recording to Layer 1 is started from the outer periphery toward the inner periphery (step S103).

  However, in the above method, there arises a problem that the optimum output of the laser cannot be determined such that the trial writing fails or the optimum output of the laser cannot be obtained even if the trial writing is performed. This is because the memory for storing data in the optical disk recording device has a capacity limit. When the capacity is exceeded, data is lost, and in order to prevent this, recording to Layer 1 must be resumed.

  Here, as shown in FIG. 7, normally, in the case of a DVD recorder, since the recording speed of the optical disk is higher than the transfer speed of data input from the outside, the pickup is performed until the data is stored in the memory. Does not record. When data is accumulated in the memory to some extent, recording is performed again, and recording is interrupted until new data is accumulated. Therefore, the recording time and the idle time are alternately generated in the pickup during recording.

  In this embodiment, when the pickup in the optical disc recording apparatus is located at the innermost circumference or the position near the outermost circumference, the idle time during which recording is not performed is used for trial writing, and trial writing processing is performed substantially in the background. . In between recordings at a certain position, the trial writing process at an arbitrary position at a position where an optimum laser output value is desired is performed once or several times. Thereby, recording in a certain range can be performed without specially requiring OPC time during recording in another certain range.

  As shown in FIG. 8, first, the optimum recording power in Layer 0 is obtained by OPC in the inner peripheral portion PCA in Layer 0 (step S200). Next, recording is performed from the inner periphery to the outer periphery of Layer 0 (step S201). In step S201, using the idle time during which the recording is not performed when the pickup is located at the innermost circumference or the position near the outermost circumference, OPC is performed in Layer1 (step S202), and then Layer1 is recorded (step S202). S203).

  As described above, in addition to the method in which the test writing is divided and performed in the background, it is also possible to perform the test writing of all locations before starting the first recording. The current optical disc is provided with a PCA, and this portion is used as a test writing area. Since PCA cannot reuse the same space, it can be performed several times, but there is an upper limit on the number of times it can be used. Therefore, it is not preferable to perform only the trial writing unnecessarily and not to record in the data area because of the upper limit of the number of times the PCA is used. Therefore, it is possible not only to record data on the layer, but also to write test data to the layer even after knowing that it is necessary to record in the data area to another layer. There is no need to do this, and wasteful consumption of PCA can be prevented.

Next, FIG. 9 is a diagram illustrating how the pickup moves.
The time obtained by adding the time required for the pickup to reciprocate between the recording position and the PCA and the time for the OPC processing should not exceed the time for which data input from outside can be continuously stored in the memory.

  First, as shown in FIG. 9A, the laser light source 104 performs recording on the optical disk 102. In FIG. 9B, recording on the optical disk 102 is interrupted, the recording moves to the PCA area, and trial writing is performed in the PCA area as shown in FIG. 9C. When the trial writing in the PCA area is completed, the laser light source 104 moves to the recording interruption position as shown in FIG.

Therefore,
Trun + Topc ≦ Tmax (1)
Trun: Time required for reciprocation between the current recording position and PCA Topc: Time spent for OPC Tmax: Time when data can be continuously stored in the memory When the above equation (1) is satisfied, the pickup is recorded at the recording interruption position. Since the recording has to be resumed while moving from the PCA to the PCA, the pickup is reciprocated meaninglessly, such that the recording must be returned to the recording interruption position without performing the test writing process at all. There is no need to let them.

Trun + Topc = Tmax (2)
In this case, since it is the innermost or outermost part that performs OPC, in order to reciprocate with that part, of the data part of the optical disk, the innermost part or the part near the outermost part However, the amount of movement of the pickup is smaller. Therefore, the time required for the pickup reciprocation is also reduced.

From the above equation (2),
Topc = Tmax−Trun (3)
Then, since Tmax is a constant, the maximum value of Topc increases as Trun decreases. Therefore, when recording from the outer periphery to the inner periphery, when recording from the inner periphery and from the inner periphery to the outer periphery, the OPC process can be performed longer as the outer periphery is approached. It becomes possible.

Further, as shown in FIG. 7, it is possible to gradually increase the time spent on OPC from a point beyond a predetermined position of the disk.
Specifically, as shown in the following formulas (4) and (5), the time Trun required for the pickup to reciprocate with the PCA is proportional to Rpca.
When recording from the outer circumference toward the inner circumference Rnow-Rpin (4)
When recording from the inner circumference toward the outer circumference Rpout-Rnow (5)
Rnow: position radius of the current position Rpin: position radius of the inner circumference PCA Rpout: position radius of the outer circumference PCA Rpca: radial distance to the PCA

Here, when Rnow, Rpin, and Rpout are shown in FIG.
Trun = α × Rpca (6)
It becomes. Here, α is a value determined by the average moving speed of the pickup. From this equation (3), considering that Tmax, Rpin, and Rpout are constants,
Topc = Tmax−α × Rpca (7)
Thus, it is possible to spend time for OPC in proportion to the distance between the recording position and the PCA.

  In the above description, the time proportional to the current recording position can be allocated to the OPC. However, this is only theoretical, and when the hardware is handled, it does not often operate as ideal. Therefore, by actually operating the time allocatable at the time of performing OPC from each position on the disk and by examining it in advance, the memory area is provided with the following table 1 so that the actual data is obtained. Based on the reliable operation can be performed.

  In the current optical disk recording apparatus, it is possible to record on optical disks having different recording speeds, and it is conceivable to perform recording on each. If the recording speed is fast, the area can be released from the memory quickly as described above. Therefore, the Tmax value in the equation (7) increases, so the Topc in the equation also increases accordingly. Accordingly, the time that can be allocated to the OPC with respect to the recording speed varies.

  The rate of increase of data stored in the memory is such that Tmax in equation (7) decreases when the transfer rate is high due to the transfer rate of input data from the outside, and therefore Topc in the equation also decreases. On the contrary, when the transfer rate is low, Tmax in the equation becomes large, so that Topc in the equation can be made large. Therefore, it is necessary to change the predetermined position to the inside or the outside according to the data transfer speed and the recording speed from the outside.

  Also, as described above, there may be one or more cases where the time allocated to OPC from the current recording position is determined. However, since the recording speed is determined at the time of disc discrimination before recording, for example, the time required for recording from the innermost circumference to the entire outermost circumference of the disc can be calculated. For example, when recording is started from the innermost circumference to the outermost circumference at a recording speed of 8 times, if it takes 10 minutes to record on the entire surface of the optical disk, it is determined to which part of the disk 5 minutes after the recording is started. It is possible to determine whether recording is being performed. Therefore, by measuring the time from the start of recording by the timer 112 and predicting the current position based on the passage of time, the time spent for OPC can be increased with the passage of time.

It is the block diagram which showed the structure of the optical disk recording device in this embodiment. It is the figure which showed the upper envelope and the lower envelope. It is the graph which showed the relationship between recording power and PSN. It is the figure which showed PTP which is a recording format of the dual layer disk of DVD-ROM. It is the figure which showed OTP which is the recording format of the dual layer disk of DVD-ROM. It is the flowchart which showed the processing operation which performs OPC in PCA of the perimeter. 5 is a flowchart showing a processing operation of recording data on an optical disc when a recording speed on the optical disc is higher than a data transfer rate. It is the flowchart which showed the processing operation which performs test writing when the pickup in this embodiment is in the innermost circumference or a position close to the outermost circumference. It is the figure which showed a mode that the pick-up from a data recording position to a PCA area | region moved. It is the figure which showed the relationship between the position radius of the present position of a pick-up, and the time which can perform test-writing processing at once during recording interruption. It is the figure which showed the present recording position radius, inner periphery PCA radius, and outer periphery PCA radius.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Optical disk recording device 101 Rotation motor 102 Optical disk 103 Optical system 104 Laser light source 105 Position sensor 106 Power control part 107 Test writing part 108 Memory 109 Recording power setting part 110 Selection part 111 Controller 112 Timer

Claims (6)

In an optical disc recording apparatus comprising a laser light source for recording information on each layer of an optical disc having a recording surface with a multilayer structure, and a pickup for moving the laser light source to a predetermined position,
First storage means for storing data to be recorded in the data area of the optical disc;
A second storage means for interrupting the recording of data in the data area and storing the recording interruption position;
Test writing means for interrupting recording of data in the data area, moving the laser light source to the test writing area, and performing test writing;
Third storage means for storing an interruption position when the trial writing by the trial writing means is interrupted;
Measuring means for measuring the current position of the pickup,
Storing the data to be recorded in the data area in the first storage means while the trial writing is being performed in the trial writing area by the trial writing means;
An optical disk recording apparatus, wherein data recording in the data area and test writing in the test writing area are alternately performed. The time required for the pickup to reciprocate from the current position of the pickup obtained by the measuring means to the test writing area;
A comparison means for comparing the time for storing data in the first storage means;
When the time required for the pickup to reciprocate by the comparing means is shorter than the longest time during which data can be stored in the first aerodynamic means, the layer of the current recording layer or another layer is recorded. 2. The optical disk recording apparatus according to claim 1, wherein trial writing is performed in the trial writing area.   2. The trial writing unit increases a ratio of time required for one trial writing as the pickup approaches the innermost or outermost part of the optical disc when performing trial writing. Or the optical disk recording device of 2.   The trial writing means has a plurality of total data in which the position of the pickup on the optical disc and the time required for the test writing that can be allocated are set as one set, and the position of the pickup and the allocation are selected from the total data 4. The optical disk recording apparatus according to claim 1, further comprising a selection unit that can select a time required for trial writing.   5. The optical disc according to claim 4, wherein the trial writing unit is capable of changing a trial writing position in accordance with a combination of a data recording speed to the first storage unit and a rotation speed of the optical disc. Recording device. Comprising time measuring means for measuring the time required for recording data in the data area;
6. The optical disc recording apparatus according to claim 1, wherein a recording position is calculated from an elapsed recording time obtained by the time measuring means, and a current position of the pickup is specified.

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