JP3867962B2 - Recording condition determining program, recording medium, recording condition determining method, and information recording apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording condition determination program and medium, a recording condition determination method, and an information recording apparatus, and more specifically, information recording using an information recording medium having a spiral or concentric recording area as an information recording target medium. Recording condition determination program to be executed by control computer of apparatus, recording medium on which recording condition determination program is recorded, and recording condition for recording information on information recording medium having spiral or concentric recording area The present invention relates to a recording condition determining method for performing the recording and an information recording apparatus suitable for implementing the recording condition determining method.
[0002]
[Prior art]
In recent years, as the functions of personal computers have improved, it has become possible to handle AV (Audio-Visual) information such as music and video. Since the amount of AV information is very large, optical discs such as CDs (compact discs) and DVDs (digital versatile discs) are attracting attention as information recording media. The optical disk apparatus has been widely used as one of peripheral devices for personal computers. In an optical disk apparatus, information is recorded by irradiating a recording surface on which a spiral or concentric track of the optical disk is formed with a laser light micro-spot, and information is reproduced based on reflected light from the recording surface. Is going. The optical disk device is provided with an optical pickup device for irradiating the recording surface of the information recording medium with laser light and receiving reflected light from the recording surface.
[0003]
In an optical disc, information is recorded by two areas having different reflectivities called a mark (pit) area and a space area. For example, in a write-once optical disc such as a CD-R (CD-recordable) or DVD-R (DVD-recordable) containing an organic dye in the recording layer, the laser light output is increased to heat the dye when forming a mark area. And the substrate part which melt | dissolves and contacts there is denatured and deformed. On the other hand, when forming the space region, the laser beam output is made as small as that during reproduction so that the substrate is not altered or deformed. Thereby, the reflectance in the mark area is lower than that in the space area.
[0004]
However, even with the same type of optical disc, the type of organic dye contained in the recording layer, the thickness of the recording layer, the width of the track pitch, etc. are slightly different depending on the manufacturer (vendor) of the optical disc. This means that a mark area having a predetermined shape is not necessarily formed depending on the optical disk even if the laser light output when forming the mark area, that is, the so-called writing power is the same. If a mark area having a shape planned at the time of recording information is not formed, it is difficult to accurately reproduce the information, and so-called recording quality is deteriorated.
[0005]
Therefore, a write-once optical disc is provided with a test writing area for detecting the optimum writing power for the optical disc. This area is called a power calibration area (hereinafter referred to as “PCA”). For example, in CD-R, the PCA has a test area divided into 100 partitions. Each partition in the test area is composed of 15 frames. Usually, in an optical disc apparatus, when recording information on a write-once optical disc, a single partition is used to testly write predetermined data by changing the write power step by step at a constant linear velocity. Among them, a so-called OPC (Optimum Power Control) operation is performed in which the write power showing the highest recording quality is selected as the optimum write power.
[0006]
In the case of a recording medium with a constant linear density, recording is usually performed while rotating the recording medium at a constant linear velocity (CLV: Constant Linear Velocity), so the relative speed between the recording medium and the laser beam is always constant. Recording conditions such as writing power and recording pulse width need not be changed over the entire surface once the optimum conditions are determined. That is, in this case, trial writing is performed with various writing powers in the PCA area on the inner peripheral portion, and recording is performed even if the entire line is recorded at the same linear velocity using the optimum writing power determined based on the result. There is no degradation in quality.
[0007]
However, as the recording speed increases, the CLV method needs to increase the rotation speed toward the inner circumference, which increases the motor cost, increases noise and vibration, and designs other servo systems. It becomes difficult. Therefore, a method has been devised in which the angular velocity of rotation is constant (CAV: Constant Angular Velocity), the rotational speed at the inner periphery is lowered, and the rotational speed at the outer periphery is increased. In this case, the linear velocity increases as it goes to the outer peripheral side. That is, the linear velocity increases in proportion to the radius. A technique called ZCLV (Zone CLV) is also put into practical use in which a zone is divided into a plurality of zones at appropriate radial positions, CLV is set in the zone, and the outer peripheral zone has a higher linear velocity. In either of the CLV method and the ZCLV method, the linear velocity at the time of trial writing may differ from the linear velocity at the time of actually recording information. Therefore, there is a disadvantage that the write power determined by OPC may not always be the optimum write power.
[0008]
In order to remedy this inconvenience, for example, Japanese Patent Laid-Open No. 2000-200416 discloses a linear velocity equal to the linear velocity at the writing position when data is recorded in the data area of an optical disk rotated at an equiangular velocity. Then, the laser drive current value of the laser beam was changed stepwise with respect to the test writing position, test writing was performed with a plurality of recording laser power values, and calculated from the reproduction signal of each data recorded at the test writing position. An optical disk recording apparatus that determines an optimum recording laser power value at a data writing position based on state information (for example, asymmetry value) is disclosed.
[0009]
[Problems to be solved by the invention]
However, the optical disc recording apparatus disclosed in the above-mentioned Japanese Patent Laid-Open No. 2000-240136 has the disadvantage that it takes time to determine the optimum recording laser power value and the data recording time becomes long. Further, for example, in CD-R, since trial writing is allowed only up to 100 times for the inner peripheral PCA, the number of trial writings may be limited. There is a disadvantage that the value cannot always be determined.
[0010]
Further, since there is a limit on the linear velocity at which trial writing can be performed at the inner peripheral portion, there is a disadvantage that an optimum recording laser power value at a necessary linear velocity may not be determined.
[0011]
The present invention has been made under such circumstances. The first object of the present invention is to be executed by a control computer of an information recording apparatus, and to determine optimum recording conditions for recording on an information recording medium at a high speed. Another object of the present invention is to provide a recording condition determination program that can be used and a recording medium on which the program is recorded.
[0012]
A second object of the present invention is to provide a recording condition determining method capable of determining an optimal recording condition for recording on an information recording medium at a high speed.
[0013]
A third object of the present invention is to provide an information recording apparatus capable of stably performing recording on an information recording medium at a high speed.
[0014]
[Means for Solving the Problems]
  From a first viewpoint, the present invention provides:A recording condition determination program for use in an information recording apparatus that uses an information recording medium having a spiral or concentric recording area as a target medium for information recording, the test being performed on the information recording medium based on an instruction from the outside A procedure for determining a plurality of areas as a target area for writing; a procedure for performing test writing in a first area among the plurality of determined areas; and a result of trial writing in the first area, A procedure for determining a basic linear velocity in trial writing in at least one specific area after the second among the plurality of determined areas;A step of estimating the optimum writing power for the trial writing in the specific area based on the result of the trial writing in the first area; and whether or not the estimated writing power exceeds a predetermined value. A procedure for determining; if the estimated write power exceeds a predetermined value as a result of the determination; a procedure for correcting the determined basic linear velocity before performing test writing in the specific area;Is a recording condition determination program for causing the control computer of the information recording apparatus to execute the above.
[0015]
  According to this, based on an instruction from the outside, a plurality of areas are determined as target areas for trial writing in the information recording medium, and trial writing is performed in the first area among the areas. Based on the result of the trial writing in the first area, the basic linear velocity in the trial writing in the second and subsequent specific areas is determined. Also,Based on the result of the trial writing in the first area, the optimum writing power for the trial writing in the specific area is estimated, and as a result of determining whether or not the estimated writing power exceeds a predetermined value If the estimated writing power exceeds a predetermined value, the basic linear velocity once determined is corrected before trial writing in a specific area. In such a case, for example, if the estimated writing power exceeds the maximum output power of the light emitting source, trial writing at the basic linear velocity becomes meaningless, but the basic linear velocity is corrected to a new basic linear velocity. By doing so, useless trial writing can be prevented, and effective information can be obtained from the result of trial writing in a specific area. Therefore, as a result, it is possible to determine the optimum recording condition for recording on the information recording medium at a high speed.
[0026]
  From the second point of view, the present inventionA computer-readable recording medium on which a recording condition determination program is recorded.
[0027]
  According to this,Recording condition determination of the present inventionSince the program is recorded, it is possible to perform effective trial writing in a predetermined area by causing the computer to execute it, and to determine the optimum recording conditions for recording on the information recording medium at a high speed. Is possible.
[0028]
  From a third viewpoint, the present invention provides:A recording condition determining method for determining a recording condition when recording information on an information recording medium having a spiral or concentric recording area, wherein test writing in the information recording medium is performed based on an instruction from the outside. A first step of determining a plurality of regions as target regions of the second; a second step of performing test writing in the first region among the plurality of regions determined in the first step; and a test writing in the second step A third step of determining a basic linear velocity in trial writing in at least one specific area after the second of the plurality of determined areas based on the result of;A fourth step of estimating an optimum writing power for the trial writing in the specific area based on the result of the trial writing in the second step; and whether or not the estimated writing power exceeds a predetermined value And when the estimated write power exceeds a predetermined value as a result of the determination in the fifth step, the basic linear velocity determined in the third step is determined in the specific region. A sixth step for correcting before the test writing;Is a recording condition determining method.
[0029]
  According to this, on the basis of an instruction from the outside, a plurality of areas are determined as test writing target areas on the information recording medium (first step), and the first area among the determined plurality of areas is tested. Writing is performed (second step). Then, based on the result of the trial writing in the first area, the basic linear velocity in the trial writing in the second and subsequent specific areas among the plurality of determined areas is determined (third step). .Further, based on the result of the trial writing in the second step, the optimum writing power for the trial writing in the specific area is estimated (fourth step), and whether or not the estimated writing power exceeds a predetermined value. Is determined (fifth step). If the writing power estimated as a result of the determination in the fifth step exceeds a predetermined value, the basic linear velocity determined in the third step is corrected before performing the test writing in the specific area ( (6th process). In such a case, for example, if the estimated writing power exceeds the maximum output power of the light emitting source, trial writing at the basic linear velocity becomes meaningless, but the basic linear velocity is corrected to a new basic linear velocity. By doing so, useless trial writing can be prevented, and effective information can be obtained from the result of trial writing in a specific area. Therefore, as a result, it is possible to determine the optimum recording condition for recording on the information recording medium at a high speed.
[0032]
  From the fourth viewpoint, the present invention provides:An information recording apparatus using an information recording medium having a spiral or concentric recording area as an information recording target medium, and a plurality of test writing target areas in the information recording medium based on an instruction from the outside Determining means for determining an area; trial writing means for performing trial writing in a first area among the plurality of areas determined by the determining means; and the determination based on a result of trial writing by the trial writing means Speed determining means for determining a basic linear velocity of trial writing in at least one specific area after the second of the plurality of areas determined by the means;Write power estimation means for estimating optimum write power for trial writing in the specific area based on the result of trial writing by the trial writing means; and whether the estimated writing power exceeds a predetermined value Determining means for determining whether the estimated linear power exceeds a predetermined value as a result of the determination by the determining means, the basic linear velocity determined by the speed determining means is tested in the specific area. Speed correction means to correct before writing;It is an information recording device provided with.
[0033]
  According to this, when a plurality of areas are determined as trial writing target areas in the information recording medium based on an instruction from the outside by the determining means, the trial writing means includes a plurality of areas determined by the determining means. Trial writing is performed in the first area. Then, the speed determination means determines the basic linear velocity of trial writing in at least one specific area after the second of the plurality of areas determined by the determination means based on the result of the trial writing by the trial writing means. The Also,In the writing power estimation means, the optimum writing power for the trial writing in the specific area is estimated based on the result of the trial writing in the trial writing means, and whether or not the estimated writing power exceeds a predetermined value When the write power estimated as a result of the determination by the determination means exceeds a predetermined value, the speed correction means causes the basic linear velocity determined by the speed determination means to be It is corrected before trial writing. In such a case, for example, if the estimated writing power exceeds the maximum output power of the light emitting source, trial writing at the basic linear velocity becomes meaningless, but the basic linear velocity is corrected to a new basic linear velocity. By doing so, useless trial writing can be prevented, and effective information can be obtained from the result of trial writing in a specific area. Therefore, as a result, it is possible to determine the optimum recording condition for recording on the information recording medium at a high speed.
[0036]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0037]
FIG. 1 is a block diagram showing a schematic configuration of an optical disc apparatus 20 as an information recording apparatus according to an embodiment of the present invention.
[0038]
1 includes a spindle motor 22, an optical pickup device 23, a laser control circuit 24, an encoder 25, a motor driver 27, and a reproduction signal processing circuit 28 for rotationally driving an optical disk 15 as an information recording medium. Servo controller 33, buffer RAM 34, buffer manager 37, interface 38, ROM 39, main controller 40, RAM 41, and the like. Note that the arrows in FIG. 1 indicate the flow of typical signals and information, and do not represent the entire connection relationship of each block. In the present embodiment, it is assumed that a CD-R is used for the optical disc 15 as an example.
[0039]
The optical pickup 23 is a semiconductor laser as a light source, an optical system that guides a light beam emitted from the semiconductor laser to a recording surface of the optical disc 15 and guides a return light beam reflected by the recording surface to a predetermined light receiving position, It includes a light receiver that is disposed at a light receiving position and receives a returning light beam, a drive system (focusing actuator, tracking actuator, and seek motor) (all not shown). The light receiver outputs a current (current signal) corresponding to the amount of received light to the reproduction signal processing circuit 28.
[0040]
As shown in FIG. 2, the reproduction signal processing circuit 28 includes an I / V amplifier 28a, a servo signal detection circuit 28b, a wobble signal detection circuit 28c, an RF signal detection circuit 28d, an ATIP decoder 28e, a CD decoder 28f, and a CD- It comprises a ROM decoder 28g, a D / A converter 28h, and the like. The I / V amplifier 28a converts a current signal that is an output signal of the optical pickup 23 into a voltage signal and further amplifies it. The servo signal detection circuit 28b detects a servo signal (focus error signal or track error signal) based on the voltage signal from the I / V amplifier 28a. The detected servo signal is output from the reproduction signal processing circuit 28 to the servo controller 33. The wobble signal detection circuit 28c detects the wobble signal based on the voltage signal from the I / V amplifier 28a. The ATIP decoder 28e extracts ATIP (Absolute Time In Pregroove) information and a synchronization signal from the wobble signal. The ATIP information extracted here is output to the main controller 40, and the synchronization signal is output to the encoder 25. The RF signal detection circuit 28d detects an RF signal including reproduction information based on the voltage signal from the I / V amplifier 28a. The CD decoder 28f performs error correction processing on the RF signal. In the CD-ROM decoder 28g, error correction processing and the like are further performed on the signal from the CD decoder 28f and then stored in the buffer RAM 34 via the buffer manager 37. In the case of music data, the signal from the CD decoder 28f is output to an external audio device or the like via the D / A converter 28h.
[0041]
Returning to FIG. 1, the servo controller 33 generates a drive signal for driving the focusing actuator of the optical pickup device 23 based on the focus error signal, and drives the tracking actuator of the optical pickup device 23 based on the track error signal. Generate a signal. Both drive signals are output from the servo controller 33 to the motor driver 27.
[0042]
The motor driver 27 drives the focusing actuator and tracking actuator of the optical pickup 23 based on a control signal from the servo controller 33. Further, the motor driver 27 controls the spindle motor 22 based on an instruction from the main controller 40 so that the linear velocity of the optical disk 15 is constant. Further, the motor driver 27 drives the seek motor of the optical pickup device 23 based on an instruction from the main controller 40 to control the position of the optical pickup device 23 in the sledge direction (radial direction of the optical disk 15).
[0043]
The encoder 25 takes out the data stored in the buffer RAM 34 through the buffer manager 37 based on an instruction from the main controller 40, adds an error correction code, and creates recording data on the optical disc 15. The encoder 25 outputs recording data to the laser control circuit 24 in synchronization with the synchronization signal from the reproduction signal processing circuit 28 based on an instruction from the main controller 40.
[0044]
As shown in FIG. 3, the laser control circuit 24 includes an LD driver 24a, a pulse setting circuit 24b, a power setting circuit 24c, and the like. In the pulse setting circuit 24b, on the basis of an instruction from the main controller 40, for example, as shown in FIG. 4, the rising edge is shifted forward by θ with respect to the recording data string (WDATA) from the encoder 25 to set the pulse width. change. The power setting circuit 24c sets the write power based on an instruction from the main controller 40. Further, the power setting circuit 24c sets the write power based on an instruction from the main controller 40. The LD driver 24a controls the output of the semiconductor laser of the optical pickup device 23 based on the recording data (WD1) pulse-adjusted by the pulse setting circuit 24b and the write power set by the power setting circuit 24c.
[0045]
The interface 38 is a bidirectional communication interface with a host (for example, a personal computer) 49 and conforms to standard interfaces such as ATAPI (AT Attachment Packet Interface) and SCSI (Small Computer System Interface).
[0046]
The ROM 39 stores a program including a recording condition determination program, which will be described later, written in a code readable by the main controller 40.
[0047]
The main controller 40 controls the operation of each unit according to the program stored in the ROM 39 and temporarily stores data necessary for control in the RAM 41. When the optical disk device 20 is turned on, the program stored in the ROM 39 is loaded into the main memory (not shown) of the main controller 40.
[0048]
Next, a case where an OPC operation is performed in response to an OPC request from the host 49 using the optical disk device 20 configured as described above will be described with reference to FIGS. The flowcharts of FIGS. 5 to 7 correspond to a series of processing algorithms executed by the main controller 40 when an OPC request command is received from the host 49. As shown in FIG. 8, it is assumed that PCA areas that can be used for the OPC operation are provided on the inner periphery side of the lead-in and the outer periphery side of the lead-out of the optical disc 15. Each PCA area includes a plurality of test areas.
[0049]
When an OPC request command is received from the host 49, in step 401 of FIG. 5, OPC (hereinafter referred to as “inner periphery OPC”) is performed using an inner periphery side PCA area (hereinafter also referred to as “inner periphery PCA area”). The process for determining the basic linear velocity is performed. Here, the basic linear velocity determination processing in the inner circumference OPC will be described in detail with reference to the flowchart of FIG.
[0050]
In step 451 of FIG. 6, a predetermined basic linear velocity at the inner circumferential OPC is set based on the recording velocity designated by the host 49. Normally, the host 49 transmits a command for designating the recording speed prior to transmitting the OPC request.
[0051]
In step 453, the optical disc 15 is rotated at the set basic linear velocity at the inner peripheral OPC (hereinafter referred to as “set inner peripheral basic linear velocity”), and the set inner basic linear velocity is set in a predetermined test area in the inner peripheral PCA area. Get the servo signal at.
[0052]
In step 455, it is determined whether servo control is possible based on the servo signal. Here, if the servo signal is disturbed, the determination in step 455 is denied, and the process proceeds to step 457.
[0053]
In step 457, it is determined whether or not the set inner circumferential basic linear velocity is 1 ×. If the set inner circumferential basic linear velocity is not 1 ×, the determination here is denied and the routine proceeds to step 459.
[0054]
In step 459, the set inner circumference basic linear velocity is decreased by one step to obtain a new set inner circumference basic linear velocity. Then, the process returns to step 453.
[0055]
On the other hand, if the set inner circumferential basic linear velocity is 1 × speed in step 457, the determination here is affirmed and the routine proceeds to step 461.
[0056]
In step 461, “1”, which means that the inner circumference OPC is not possible, is set in the inner circumference OPC flag indicating the processing result of the basic linear velocity determination process. Then, the basic linear velocity determination process at the inner circumference OPC is terminated.
[0057]
If there is no disturbance in the servo signal at step 455, the determination at step 455 is affirmed and the routine proceeds to step 463.
[0058]
In step 463, the set inner peripheral basic linear velocity is set as the basic linear velocity Vi of the inner peripheral OPC.
[0059]
In step 465, “0” is set in the inner circumference OPC flag, which means that inner circumference OPC is possible. Then, the basic linear velocity determination process at the inner circumference OPC is terminated.
[0060]
In step 402 of FIG. 5, it is determined whether or not inner circumference OPC is possible based on the inner circumference OPC flag. Here, if the inner circumference OPC flag is “0”, the determination in step 402 is affirmed, and the routine proceeds to step 403.
[0061]
In step 403, a write power fluctuation range corresponding to the basic linear velocity Vi of the inner circumference OPC is set. Then, the laser control circuit 24 is notified of a pulse width correction value (here, θi) corresponding to the basic linear velocity Vi.
[0062]
In step 405, the inner circumference OPC is executed in a predetermined test area in the inner circumference PCA area.
[0063]
In step 407, it is determined whether or not the inner circumference OPC has ended normally. Here, when the inner circumference OPC is normally completed, the determination in step 407 is affirmed, and the routine proceeds to step 409. Note that whether or not the inner circumference OPC has ended normally is determined by the vertical symmetry and amplitude of the reproduction signal. Further, the determination may be made based on whether or not the optimum writing power is obtained. In the present embodiment, it is assumed that the optimum write power Pwi is obtained as a result of the inner circumference OPC.
[0064]
In step 409, processing is performed to determine a basic linear velocity for performing OPC (hereinafter referred to as “outer peripheral OPC”) using an outer peripheral PCA area (hereinafter also referred to as “outer peripheral PCA area”). Here, the basic linear velocity determination processing in the outer periphery OPC will be described in detail using the flowchart of FIG.
[0065]
In step 501 of FIG. 7, a predetermined basic linear velocity Vs at the outer periphery OPC is set based on the recording velocity designated by the host 49.
[0066]
In step 503, an optimum write power Pwe is estimated with respect to a predetermined basic linear velocity (hereinafter referred to as “set outer peripheral basic linear velocity”) Vs at the set outer peripheral OPC, based on the following equation (1). That is, the optimum write power Pwe at the outer periphery OPC is estimated based on the optimum write power Pwi obtained at the inner periphery OPC. Then, the write power fluctuation range is calculated based on the following equations (2) and (3). Here, Pwel is a lower limit value in the write power fluctuation range, and Pweh is an upper limit value in the write power fluctuation range.
[0067]
Pwe = (Vs / Vi) × Pwi ...... (1)
[0068]
Pwel = Pwe × 0.6 (2)
[0069]
Pweh = Pwe × 1.4 (3)
[0070]
In step 505, it is determined whether or not the estimated optimum write power Pwe exceeds a predetermined value P. If the estimated optimum write power Pwe exceeds the predetermined value P, the determination at step 505 is affirmed and the routine proceeds to step 507. In this embodiment, the maximum output power of the semiconductor laser is used as the predetermined value P. However, the present invention is not limited to this, and an arbitrary value can be set and changed from the host 49 to an arbitrary value. it can.
[0071]
In step 507, the maximum linear velocity possible in the outer periphery OPC on the optical disc 15 is calculated. Here, the maximum linear velocity Vm is calculated based on the following equation (4) obtained by modifying the above equation (1). Then, the maximum linear velocity Vm is newly set as the set outer peripheral basic linear velocity Vs, and the process proceeds to step 509.
[0072]
Vm = Vi × P / Pwi (4)
[0073]
On the other hand, if the estimated optimum write power Pwe is less than or equal to the predetermined value P in step 505, the determination in step 505 is denied and the process proceeds to step 508.
[0074]
In step 508, it is further determined whether or not the write power fluctuation range calculated as described above is outside a predetermined range. Here, when the fluctuation range of the write power is outside the predetermined range, the determination in step 508 is affirmed, and the process proceeds to step 507. On the other hand, if the fluctuation range of the write power is within the predetermined range, the determination in step 508 is denied and the process proceeds to step 509.
[0075]
In step 509, the set outer peripheral basic linear velocity Vs is determined as the basic linear velocity Vo at the outer peripheral OPC, and the basic linear velocity determining process at the outer peripheral OPC is terminated.
[0076]
Returning to FIG. 5, in step 411, a servo check is performed in a predetermined test area in the outer peripheral PCA area. That is, the optical disk 15 is rotated at the basic linear velocity Vo, and the disturbance in the servo signal at that time is measured.
[0077]
In step 413, it is determined whether the servo control can be accurately performed based on the measurement result of the disturbance in the servo signal. If the servo control can be accurately performed, the determination in step 413 is affirmed, and the process proceeds to step 415.
[0078]
In step 415, a write power fluctuation range corresponding to the basic linear velocity Vo at the outer periphery OPC is set. Based on the following equation (5), an optimum pulse width correction value θo is calculated and notified to the laser control circuit 24. In the equation (5), k is a proportionality constant obtained from an experiment or the like.
[0079]
θo = (Vo-Vi) × k + θi (5)
[0080]
In step 417, the outer periphery OPC is executed in a predetermined test area in the outer periphery PCA area.
[0081]
In step 419, it is determined whether or not the outer periphery OPC has ended normally. If the outer periphery OPC is normally completed, the determination in step 419 is affirmed, and the routine proceeds to step 421. Note that whether or not the outer periphery OPC has ended normally is determined in the same manner as in the inner periphery OPC described above. In this embodiment, it is assumed that Pwo is obtained as the optimum write power.
[0082]
In step 421, the optimum write power at the recording speed V designated by the host is calculated based on the result of the inner periphery OPC and the result of the outer periphery OPC. That is, as shown in FIG. 8A, the optimum write power Pwv is calculated based on the following equation (6).
[0083]
Pwv = (Pwo-Pwi) / (Vo-Vi) × V + (Pwi × Vo-Pwo × Vi) / (Vo-Vi) ...... (6)
[0084]
Further, as shown in FIG. 8B, an optimal pulse width correction value θv is obtained based on the following equation (7).
[0085]
θv = (θo-θi) / (Vo-Vi) × V + (θi × Vo-θo × Vi) / (Vo-Vi) (7)
[0086]
In step 422, the host is notified that the OPC process has ended normally, and the OPC process ends.
[0087]
On the other hand, if the outer periphery OPC does not end normally at step 419, the determination at step 419 is denied and the routine proceeds to step 423.
[0088]
In step 423, the basic linear velocity Vo of the outer peripheral OPC is decelerated by one step to obtain a new basic linear velocity Vo of the outer peripheral OPC.
[0089]
In step 425, it is determined whether or not the basic linear velocity Vo of the new outer peripheral OPC is equal to or lower than the basic linear velocity Vi of the inner peripheral OPC. If the basic linear velocity Vo of the new outer peripheral OPC exceeds the basic linear velocity Vi of the inner peripheral OPC, the determination in step 425 is denied and the processing returns to step 417. In other words, the outer peripheral OPC is performed again at the new basic linear velocity Vo of the outer peripheral OPC. In the second outer periphery OPC, the outer periphery OPC is performed in a test area following the test area in the outer periphery PCA area used in the first outer periphery OPC.
[0090]
On the other hand, if the basic linear velocity Vo of the new outer peripheral OPC is equal to or lower than the basic linear velocity Vi of the inner peripheral OPC at step 425, the determination at step 425 is affirmed and the routine proceeds to step 427.
[0091]
In step 427, the optimum writing power at the designated recording speed V is calculated only from the result of the inner circumference OPC. That is, the optimum write power Pwv is calculated based on the following equation (8).
[0092]
Pwv = (V / Vi) × Pwi ...... (8)
[0093]
Further, an optimum pulse width correction value θv is obtained based on the following equation (9). Then, the process proceeds to step 422.
[0094]
θv = (V-Vi) × k + θi (9)
[0095]
Further, in step 413, if the servo control cannot be performed accurately, the determination in step 413 is denied and the process proceeds to step 429.
[0096]
In step 429, the basic linear velocity Vo of the outer peripheral OPC is decelerated by one step to obtain a new basic linear velocity Vo of the outer peripheral OPC.
[0097]
In step 431, it is determined whether or not the basic linear velocity Vo of the new outer peripheral OPC is equal to or lower than the basic linear velocity Vi of the inner peripheral OPC. If the basic linear velocity Vo of the new outer peripheral OPC exceeds the basic linear velocity Vi of the inner peripheral OPC, the determination in step 431 is denied and the processing returns to step 411. That is, the servo check is performed again in the outer peripheral PCA area at the new basic linear velocity Vo of the outer peripheral OPC.
[0098]
On the other hand, if the basic linear velocity Vo of the new outer peripheral OPC is equal to or lower than the basic linear velocity Vi of the inner peripheral OPC at step 431, the determination at step 431 is affirmed and the routine proceeds to step 427.
[0099]
In step 407, if the inner circumference OPC does not end normally, the determination in step 407 is denied and the routine proceeds to step 433.
[0100]
In step 433, the host is notified that the OPC process has not ended normally, and the OPC process ends.
[0101]
Furthermore, if the inner circumference OPC flag is “1” at step 402, the determination at step 402 is denied and the routine proceeds to step 433.
[0102]
Here, a processing operation at the time of recording in the optical disc apparatus 20 will be briefly described. Here, as described above, it is assumed that the optimum writing power and the optimum pulse width correction value for the designated recording speed are obtained. The main controller 40 outputs a control signal for controlling the rotation of the spindle motor 22 based on the designated recording speed to the motor driver 27 and notifies the reproduction signal processing circuit 28 that the write request command has been received. . When the rotation of the optical disk 15 reaches a predetermined linear velocity, the reproduction signal processing circuit 28 acquires ATIP information and servo signals based on the output signal from the optical pickup device 23. The ATIP information is output to the main controller 40, and the servo signal is output to the servo controller 33. The servo controller 33 drives the focusing actuator and tracking actuator of the optical pickup device 23 via the motor driver 27 based on the servo signal from the reproduction signal processing circuit 28 to correct the focus deviation and the track deviation. When the main controller 40 accumulates the write data from the host 49 in the buffer RAM 34 via the buffer manager 37, it receives a notification from the buffer manager 37 that the amount of data accumulated in the buffer RAM 34 has exceeded a predetermined value. The encoder 25 is instructed to create recording data. Then, based on the ATIP information from the reproduction signal processing circuit 28, a signal for instructing the seek operation of the optical pickup device 23 is output to the motor driver 27 so that the optical pickup device 23 is positioned at the designated write start point. When the main controller 40 determines that the position of the optical pickup device 23 is the writing start point based on the ATIP information, the main controller 40 notifies the encoder 25. The encoder 25 records the recording data on the optical disc 15 via the laser control circuit 24 and the optical pickup 23.
[0103]
Next, the processing operation of the optical disc apparatus 20 when a read request command from the host 49 is received will be briefly described. When the main controller 40 receives the read request command from the host 49, it outputs a control signal for controlling the rotation of the spindle motor 22 to the motor driver 27 based on the reproduction speed, and also indicates that the read request has been received from the host 49. The reproduction signal processing circuit 28 is notified. When the rotation of the optical disk 15 reaches a predetermined linear velocity, the reproduction signal processing circuit 28 acquires ATIP information, servo signals, and the like based on the output signal from the optical pickup device 23. The ATIP information is output to the main controller 40, and the servo signal is output to the servo controller 33. The servo controller 33 drives the focusing actuator and tracking actuator of the optical pickup device 23 via the motor driver 27 based on the servo signal from the reproduction signal processing circuit 28, and corrects the focus deviation and the track deviation. The main controller 40 outputs a signal for instructing a seek operation to the motor driver 27 so that the optical pickup device 23 is located at the reading start point designated based on the ATIP information. When the main controller 40 determines that the position of the optical pickup device 23 is the reading start point based on the ATIP information, the main controller 40 notifies the reproduction signal processing circuit 28. Then, the reproduction signal processing circuit 28 detects the RF signal based on the output signal of the optical pickup device 23, performs error correction processing, etc., and then stores it in the buffer RAM 34. The buffer manager 37 transmits the reproduction data stored in the buffer RAM 34 to the host 49 via the interface 38 when the reproduction data is prepared as sector data.
[0104]
In the optical disk device 20, the reproduction signal processing circuit 28 detects a servo signal based on the output signal from the optical pickup device 23 until the recording process and the reproduction process are completed, and passes through the servo controller 33 and the motor driver 27. To correct focus shift and track shift as needed.
[0105]
As is clear from the above description, in the present embodiment, the main controller 40 constitutes determination means, trial writing means, speed determination means, determination means, and speed correction means.
[0106]
However, it goes without saying that the present invention is not limited to this. That is, the above-described embodiment is merely an example, and at least a part of each component realized by processing according to the program by the main controller 40 may be configured by hardware, or all the components may be configured by hardware. It may be configured.
[0107]
As described above, according to the optical disc apparatus according to the present embodiment, the inner circumference PCA area and the outer circumference PCA area are determined as the trial writing target areas on the optical disc 15 based on an instruction from the host. Test writing is performed in (first area). Then, based on the result of the trial writing in the inner peripheral PCA area, the basic linear velocity in the trial writing in the outer peripheral PCA area (specific area) is determined. Accordingly, effective information can be obtained from the result of trial writing in the outer peripheral PCA area, and as a result, it is possible to determine the optimum recording condition for recording on the information recording medium at a high speed.
[0108]
Further, according to the present embodiment, when the optimum writing power for the trial writing in the outer peripheral PCA area is estimated based on the result of the trial writing in the inner peripheral PCA area, and the estimated writing power exceeds a predetermined value Only, the basic linear velocity in the outer peripheral PCA region is corrected to a new basic linear velocity. Therefore, for example, if the estimated writing power exceeds the maximum output power of the light source, trial writing at the basic linear velocity is meaningless, but by correcting the basic linear velocity to a new basic linear velocity Therefore, useless trial writing can be prevented, and effective information can be obtained from the result of trial writing in the outer peripheral PCA area. As a result, it is possible to determine an optimum recording condition for recording on the information recording medium at a high speed.
[0109]
Furthermore, according to the present embodiment, the servo signal (control signal) at the determined basic linear velocity at the outer peripheral OPC is acquired, and when the servo signal is disturbed, the determined basic linear velocity at the outer peripheral OPC is obtained. It has been corrected to a new basic linear velocity. If there is a disturbance in the servo signal, trial writing at that basic linear velocity is meaningless, but it is wasted by setting the basic linear velocity that has been confirmed in advance to be free of disturbance in the servo signal as a new basic linear velocity. Therefore, effective information can be obtained from the result of trial writing in the outer peripheral PCA area. As a result, it is possible to determine an optimum recording condition for recording on the information recording medium at a high speed.
[0110]
Further, according to the present embodiment, when the trial writing in the outer PCA area is not normally completed, the basic linear velocity of the trial writing in the outer PCA area is corrected to be a new basic linear velocity, and the basic line Test writing is performed again at a speed. Therefore, the optimum writing power for the recording speed designated by the host can be obtained with high accuracy.
[0111]
In the above embodiment, in the process of determining the basic linear velocity at the outer periphery OPC (step 409), when the estimated optimum write power at the outer periphery OPC exceeds the predetermined value P, the maximum possible outer periphery OPC is possible. The case where the linear velocity is calculated and set as the basic linear velocity at the new outer periphery OPC has been described. However, the present invention is not limited to this, and when the optimum write power at the estimated outer periphery OPC exceeds a predetermined value P, the outer periphery OPC is calculated. The optimum writing power at the designated recording speed may be calculated only from the result of the inner circumference OPC without performing the above.
[0112]
In the above-described embodiment, the case where the servo check at the outer periphery OPC position is performed after the process of determining the basic linear velocity at the outer periphery OPC (step 409) has been described. Prior to the process of determining the linear velocity, a servo check at a predetermined basic linear velocity at the outer periphery OPC may be performed.
[0113]
Further, in the above-described embodiment, when the result of the outer periphery OPC is not a normal end in step 419, the basic linear velocity at the outer periphery OPC is decelerated by one step, and then the outer periphery OPC is performed again. If the result of the outer periphery OPC is not a normal end, the process immediately proceeds to step 427, and the optimum writing power for the designated recording speed may be calculated only from the result of the inner periphery OPC.
[0114]
In the above embodiment, the servo check at the basic linear velocity at the outer periphery OPC is described prior to the execution of the outer periphery OPC. However, the servo check at the basic linear velocity at the outer periphery OPC is not necessarily performed. good.
[0115]
In the above embodiment, the case where the optimum pulse width correction value is the same when the linear velocity is the same has been described. However, the present invention is not limited to this, and for example, it varies depending on the High width (that is, the recording mark length) in WDATA. A value may be set. For example, the recording sensitivity when the recording mark length is short may be corrected by setting the optimum pulse width correction value to be longer as the High width is shorter.
[0116]
Further, the writing power and the pulse width may be fixed, but are preferably set according to the linear velocity. This is because the difference in recording sensitivity for each recording mark length due to the linear velocity can be corrected. When the linear velocity is changed during recording as in the ZCLV method or the CAV method, the writing power or the pulse width may be changed as needed according to the linear velocity.
[0117]
Furthermore, in the above-described embodiment, the case where the above equation (8) is used when calculating the write power optimum for the recording speed from only the result of the inner periphery OPC has been described. However, the present invention is not limited to this equation (8). Polynomials obtained by performing statistical processing on various experimental results may be used. Further, the case where the pulse width correction value optimum for the recording speed is calculated only from the result of the inner circumference OPC is not limited to the above equation (9), but, for example, a polynomial obtained by performing statistical processing on various experimental results. May be used.
[0118]
In the above embodiment, in the basic linear velocity determination process in the inner circumference OPC, after confirming that there is no disturbance in the servo signal at the basic linear velocity set based on the recording velocity designated by the host, Although the basic linear velocity at the circumferential OPC is determined, the present invention is not limited to this, and the set basic linear velocity may be determined as the basic linear velocity at the inner circumferential OPC as it is.
[0119]
Furthermore, in the above-described embodiment, the case where the area for performing the test writing is the two areas of the inner peripheral PCA area and the outer peripheral OPC has been described, but the present invention is not limited to this.
[0120]
In the above embodiment, the basic linear velocity at the outer peripheral OPC is determined based on the result of the inner peripheral OPC. However, the basic linear velocity at the inner peripheral OPC is determined based on the result of the outer peripheral OPC. Also good. Furthermore, the servo signal at the basic linear velocity at the outer peripheral OPC set based on the recording speed set from the host is acquired, and when the servo signal is disturbed, the basic linear velocity at the set outer peripheral OPC is obtained. It may be modified to a new basic linear velocity. According to this, it is possible to prevent unnecessary test writing by making the basic linear velocity, which has been confirmed not to disturb the control signal in advance, a new basic linear velocity, and to effectively perform test writing in a specific area. Can be done. As a result, it is possible to determine an optimum recording condition for recording on the information recording medium at a high speed. If it can be expected that the servo signal will not be disturbed, the servo signal need not always be checked.
[0121]
In the optical disk apparatus of the above embodiment, the recording condition determination program is recorded in the ROM 39, but may be recorded in other information recording media (CD-ROM, magneto-optical disk, MO, etc.). In short, the recording condition determination program may be loaded into the main memory of the CPU 40.
[0122]
【The invention's effect】
As described above, according to the recording condition determination program and the recording medium according to the present invention, the optimum recording condition for recording on the information recording medium at a high speed is determined by being executed by the control computer of the information recording apparatus. There is an effect that can be done.
[0123]
In addition, according to the recording condition determination method of the present invention, there is an effect that it is possible to determine an optimal recording condition for recording on an information recording medium at a high speed.
[0124]
Moreover, according to the information recording apparatus of the present invention, there is an effect that recording at a high speed on the information recording medium can be stably performed.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an optical disc apparatus according to an embodiment of the present invention.
2 is a block diagram for explaining a detailed configuration of a reproduction signal processing circuit in FIG. 1; FIG.
3 is a block diagram for explaining a detailed configuration of a laser control circuit in FIG. 1. FIG.
FIG. 4 is a diagram for explaining a pulse width correction value;
FIG. 5 is a flowchart for explaining write power calculation processing according to the embodiment of the present invention;
FIG. 6 is a flowchart for explaining details of step 401 in FIG. 5;
FIG. 7 is a flowchart for explaining details of Step 409 in FIG. 5;
FIG. 8 is a diagram for explaining an inner circumference side PCA area and an outer circumference side PCA area;
FIGS. 9A and 9B illustrate a method of calculating the optimum write power and pulse width correction value at the recording speed V from the result of the inner periphery OPC and the result of the outer periphery OPC, respectively. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 15 ... Optical disk (information recording medium), 20 ... Optical disk apparatus (information recording device), 40 ... Main controller (Determination means, trial writing means, speed determination means, discrimination means, speed correction means)

Claims (10)

A recording condition determination program used in an information recording apparatus using an information recording medium having a spiral or concentric recording area as a target medium for information recording,
A procedure for determining a plurality of areas as test writing target areas on the information recording medium based on an instruction from the outside;
A procedure for performing test writing in a first area of the plurality of determined areas;
A procedure for determining a basic linear velocity in trial writing in at least one specific area after the second of the plurality of determined areas based on a result of trial writing in the first area;
A step of estimating the optimum writing power for the trial writing in the specific area based on the result of the trial writing in the first area;
Determining whether the estimated write power exceeds a predetermined value;
A step of correcting the determined basic linear velocity before trial writing in the specific area when the estimated writing power exceeds a predetermined value as a result of the determination; Recording condition determination program to be executed by the control computer. 2. The control computer according to claim 1 , further comprising a step of causing the control computer to further execute a procedure of interrupting the trial writing in the specific area when the estimated writing power exceeds a predetermined value as a result of the determination. Recording condition determination program. Obtaining a control signal at the basic linear velocity determined in the procedure for determining the basic linear velocity;
A procedure for determining the presence or absence of disturbance in the acquired control signal;
If the control signal is disturbed as a result of the determination, the control computer is further caused to execute a procedure for correcting the basic linear velocity of the trial writing in the specific area to a new basic linear velocity; The recording condition determining program according to claim 1 or 2 , characterized in that The first area is a PCA area provided on the inner circumference side of the information recording medium, and one of the specific areas is a PCA area provided on the outer circumference side of the information recording medium. The recording condition determination program according to any one of claims 1 to 3 . A procedure for performing test writing in the specific area;
A procedure for determining whether or not the test writing in the specific area is normally completed;
A procedure for correcting the basic linear velocity of the trial writing in the specific region to a new basic linear velocity when the trial writing in the specific region is not normally completed as a result of the determination;
The recording condition determination program according to claim 1 , further causing the control computer to execute a procedure for performing trial writing again at the basic linear velocity. 6. The recording condition determining program according to claim 1 , wherein the basic linear velocities of the trial writing are different for each of the determined areas. A procedure for estimating an optimum writing power at a specified recording speed based on a trial writing result in an area in which trial writing has been normally completed among the plurality of areas when there is an external recording request; ;
7. The recording condition according to claim 1 , further causing the control computer to execute a procedure for correcting the designated recording speed based on the estimated writing power. Decision program. A computer-readable recording medium on which the recording condition determination program according to any one of claims 1 to 6 is recorded. A recording condition determining method for determining a recording condition when recording information on an information recording medium having a spiral or concentric recording area,
A first step of determining a plurality of areas as test writing target areas in the information recording medium based on an instruction from the outside;
A second step of performing test writing in the first region among the plurality of regions determined in the first step;
A third step of determining a basic linear velocity in trial writing in at least one specific region after the second of the plurality of determined regions based on the result of trial writing in the second step;
A fourth step of estimating an optimum writing power for the trial writing in the specific area based on the result of the trial writing in the second step;
A fifth step of determining whether the estimated write power exceeds a predetermined value;
If the estimated writing power exceeds a predetermined value as a result of the determination in the fifth step, the basic linear velocity determined in the third step is corrected before performing the test writing in the specific area. A recording condition determining method comprising : a sixth step; An information recording apparatus using an information recording medium having a spiral or concentric recording area as an information recording target medium,
Determining means for determining a plurality of areas as target areas for trial writing in the information recording medium based on an instruction from the outside;
Test writing means for performing test writing in the first area among the plurality of areas determined by the determining means;
Speed determining means for determining a basic linear velocity of trial writing in at least one specific area after the second of the plurality of areas determined by the determining means based on a result of the trial writing by the test writing means; ;
Write power estimation means for estimating the optimum write power for trial writing in the specific area based on the result of trial writing by the trial writing means;
Judging means for judging whether or not the estimated write power exceeds a predetermined value;
If the estimated writing power exceeds a predetermined value as a result of the judgment by the judgment means, the basic linear speed determined by the speed determination means is corrected before the trial writing in the specific area. An information recording apparatus comprising: correction means;

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