JP4170691B2 - Information recording apparatus, information recording method, program, and computer-readable recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an information recording apparatus such as an MO drive, a CD-R / RW drive, a CD + R / RW drive, a DVD-R / RW drive, a DVD + R / RW drive, an MO disk, a CD-R / RW disk, and a CD + R / RW. An information recording method for recording information on an information recording medium such as a disc, DVD-RAM, DVD-R / RW disc, DVD + R / RW disc, and a program for causing a computer to execute a procedure for recording information on the information recording medium , Computer-readable recording of the programWith recording mediaAbout.
[0002]
[Prior art]
  For example, in an information recording apparatus that records information on an information recording medium such as a CD-R (Compact Disc Recordable) disc (for example, see JP-A-11-296858), data is always read from the information recording medium at a constant speed. Therefore, a constant linear velocity recording method (Constant Linear Velocity: CLV method) in which information is recorded at a constant linear velocity by changing the number of rotations is generally employed. In the case of this CLV method, the relative speed between the information recording medium and the laser beam is always constant, so once the recording conditions such as recording power and recording pulse width are determined optimally, it is necessary to change the entire recording surface of the information recording medium. There is no. For this reason, there is usually no problem in performing trial writing by varying the recording power in a specific area in the innermost periphery, and recording the entire surface at the same linear velocity using the optimum recording power determined by the trial writing.
[0003]
  However, in the CLV system, it is necessary to increase the number of revolutions toward the inner periphery of the information recording medium. Therefore, it becomes difficult to rotate at higher speeds, and an expensive motor capable of high-speed rotation is used. This increases the motor cost, increases noise and vibration due to high-speed rotation, and makes it difficult to design other servo systems. Therefore, there is also a constant angular velocity recording method (Constant Angular Velocity: CAV method) in which information is recorded by always rotating the information recording medium at a constant number of rotations. In this CAV method, the linear velocity is naturally increased toward the outer periphery. . In addition, since the linear velocity increases toward the outer peripheral portion, an information recording medium is used as a method of not reducing the rotational speed so much even when going to the outer peripheral portion, instead of increasing the rotational speed so much at the inner peripheral portion. Zone CLV method (Zone CLV: ZCLV method) in which information is recorded by dividing the zone at an appropriate radial position from the periphery, and recording information in the zone by the CLV method, and changing the linear velocity to a higher zone on the outer periphery side. There was also.
[0004]
  Regardless of the CAV method or the ZCLV method as described above, there are cases where recording is performed at a linear velocity different from the linear velocity of the inner peripheral area where test writing is performed. In that case, what to do with the recording power and other recording conditions becomes an issue.
  Therefore, conventionally, an information recording apparatus has been proposed in which a predetermined calculation is performed on the test writing result to calculate recording conditions of different linear velocities.
  Also, during recording information on the information recording medium, information recording employing a method of comparing a predetermined recording state target value with a value corresponding to a reproduction signal from the information recording medium and correcting the recording power according to the comparison result Devices have also been proposed. The so-called trial writing method is called OPC (Optimum Power Control), whereas the recording power is corrected in real time during recording of information, so it is called running OPC (Running OPC).
  With this running OPC, it has become possible to record information by appropriately adjusting the recording power to an optimum value so as to suppress fluctuations in recording sensitivity due to fluctuations in media sensitivity during recording and wavelength variations of the laser light source.
[0005]
[Problems to be solved by the invention]
  However, in the above-described conventional information recording apparatus, when the recording power is corrected during recording by running OPC, the running OPC depends on conditions such as the information recording medium, recording speed, information recording apparatus, and external temperature at the time of information recording. If the amount of power increase due to is large, there is a problem that the maximum output power of the laser light source is exceeded. In such a case, it is necessary to lower the recording power in order not to deteriorate the laser light source, but on the other hand, it is also required to perform recording at a higher speed.
  Further, when the recording power fluctuation due to running OPC is large, it is conceivable that the amount of power required for recording varies depending on the change of the wavelength of the laser light source. Therefore, it is important to consider so as not to affect the recording quality when the recording speed is changed. This is particularly important in an information recording apparatus that records information at a short wavelength, such as a DVD + R disk.
[0006]
  In the zone CLV method, it is necessary to set the recording power of the next zone in consideration of the correction amount of the running OPC at the change of the zone. However, if the power increase due to the running OPC is large, the setting power at the start of recording of the next zone May exceed the maximum output of the laser light source.
  The present invention has been made in order to solve the above-described problems, and prevents the occurrence of a problem that exceeds the maximum output of the laser light source due to the effect of power correction by running OPC, and the fastest without deteriorating the laser light source. An object of the present invention is to realize high recording quality by recording information at a high recording speed and an optimal recording power.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention provides the following (1) to (4) Information recording apparatus.
(1) An information recording apparatus for writing information with a substantially constant linear density in the circumferential direction of a disk-shaped recording medium, the light source for condensing a light beam on a recording film of the disk-shaped recording medium, and the disk-shaped Trial writing means for performing trial writing in a predetermined area of the recording medium at a predetermined basic linear velocity to determine an optimum recording power at the basic linear velocity, and a predetermined recording state target during recording of information on the disc-shaped recording medium A recording power correcting unit that compares the value with a value corresponding to a reproduction signal from the disk-shaped recording medium, and corrects the recording power as needed according to the comparison result, and the recording power is set to a predetermined value by the recording power correcting unit. To temporarily stop recording when the maximum output value is exceeded and reduce the temperature rise that occurs during recording of the light sourcePredetermined time intervalA recording stop unit that repeats the process of resuming recording at the recording linear velocity at the time of stop after being set, and the recording power exceeds a predetermined maximum output value even if the above process is repeated a predetermined number of times by the recording stop unit The recording linear velocity resetting means for resetting from the recording linear velocity at the time of temporary stop by the recording stop means to a predetermined recording linear velocity, and the recording linear velocity reset by the recording linear velocity resetting means An information recording apparatus comprising recording restarting means for restarting recording without interrupting continuous information at the temporary stop after the recording power is determined by the test writing means.
[0008]
(2) An information recording apparatus for writing information with a substantially constant linear density in the circumferential direction of a disk-shaped recording medium, wherein trial writing is performed at a predetermined basic linear velocity in a predetermined area of the disk-shaped recording medium, and Test writing means for determining the optimum recording power at the basic linear velocity, and a predetermined recording state target value during recording of information on the disc-shaped recording medium and a value corresponding to a reproduction signal from the disc-shaped recording medium are compared. Recording power correction means for correcting the recording power at any time according to the result of the comparison, and when the amount of correction of the recording power corrected by the recording power correction means exceeds a predetermined amount, recording is temporarily stopped, An information recording apparatus comprising recording resumption means for setting recording power obtained by re-execution of trial writing by trial writing means and resuming recording.
[0009]
(3) In the information recording apparatus according to (1) or (2), means for performing trial writing at a linear velocity when the recording is resumed with respect to a predetermined area provided on the outer periphery of the disc-shaped recording medium An information recording apparatus.
(4) In the information recording apparatus according to any one of (1) to (3), the information recording apparatus is applied to the recording power at the start of recording which is estimated and set from the result of trial writing by the trial writing means before the start of recording. An information recording apparatus in which an allowable value of recording power corrected during recording by the recording power correcting means is larger by a predetermined value than an allowable value of maximum recording power.
[0010]
  The following (5) ~ (8) Information recording method is also provided.
(5) An information recording method for condensing a light beam from a light source on a recording film of a disk-shaped recording medium and writing information with a substantially constant linear density in a circumferential direction of the disk-shaped recording medium, Trial writing is performed on a predetermined area of the recording medium at a predetermined basic linear velocity to determine an optimum recording power at the basic linear velocity, and a predetermined recording state target value and the disk are recorded while information is recorded on the disk-shaped recording medium. Compared with the value corresponding to the playback signal from the recording medium, the recording power is corrected as needed according to the comparison result, and the recording is temporarily stopped when the corrected recording power exceeds a predetermined maximum output value. To reduce the temperature rise that occurs during the recording of the light source.Predetermined time intervalWhen the recording linear velocity is temporarily stopped and the recording is resumed at a recording linear velocity for a predetermined number of times, and the recording power exceeds a predetermined maximum output value even after the above processing is repeated a predetermined number of times, The recording linear velocity is reduced to a predetermined recording linear velocity and reset, and the recording power at the reset recording linear velocity is determined by the test writing, and then the recording is resumed without interruption of the continuous information at the temporary stop point. Information recording method.
[0011]
(6) An information recording method for writing information with a substantially constant linear density in the circumferential direction of a disc-shaped recording medium, wherein the basic line is obtained by performing trial writing in a predetermined area of the disc-shaped recording medium at a predetermined basic linear velocity. An optimum recording power at a speed is determined, and a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the disk-shaped recording medium while information is recorded on the disk-shaped recording medium. Accordingly, the recording power is corrected at any time, and when the corrected amount of the corrected recording power exceeds the predetermined amount, recording is temporarily stopped, and the recording power obtained by re-execution of the test writing by the above test writing is set. Information recording method to resume recording.
[0012]
(7)the above(5Or6The information recording method in which trial writing is performed at a linear velocity when the recording is resumed with respect to a predetermined area provided on the outer peripheral portion of the disc-shaped recording medium.
(8)the above(5) To (7In any of the information recording methods, the maximum recording power applied to the recording power at the start of recording, which is estimated and set from the result of the trial writing by the trial writing before the recording is started, is recorded. An information recording method in which an allowable value of recording power to be corrected is increased by a predetermined value.
[0013]
  In addition, the following (9)When(10) Program.
(9) A procedure for concentrating the light beam from the light source on the recording film of the disk-shaped recording medium and writing information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium; Trial writing procedure for determining optimum recording power at the basic linear velocity by performing trial writing in a predetermined area of the medium at a predetermined basic linear velocity, and a predetermined recording state target value during recording information on the disc-shaped recording medium And a value corresponding to the reproduction signal from the disc-shaped recording medium, a recording power correction procedure for correcting the recording power as needed according to the comparison result, and a recording power is set to a predetermined maximum by the recording power correction procedure. To temporarily stop recording when the output value is exceeded and reduce the temperature rise that occurs during recording with the light sourcePredetermined time intervalA recording stop procedure that repeats the process of resuming recording at the recording linear velocity once stopped after a predetermined number of times, and the recording power exceeds a predetermined maximum output value even if the above process is repeated a predetermined number of times by the recording stop procedure The recording linear velocity resetting procedure for resetting the recording linear velocity from the temporarily stopped recording linear velocity by the recording stopping procedure to the predetermined recording linear velocity, and the recording linear velocity reset by the recording linear velocity resetting procedure. A program for executing a recording resumption procedure for resuming recording without continuation of continuous information at the temporary stop after the recording power is determined by the trial writing procedure.
[0014]
(10) A procedure for writing information to a computer with a substantially constant linear density in the circumferential direction of the disc-shaped recording medium, and a trial writing at a predetermined basic linear velocity in a predetermined area of the disc-shaped recording medium, and the basic linear velocity. A trial writing procedure for determining the optimum recording power in the recording medium, and a comparison between a predetermined recording state target value and a value corresponding to a reproduction signal from the disk recording medium while recording information on the disk recording medium. The recording power correction procedure for correcting the recording power as needed according to the result, and when the amount of correction of the recording power corrected by the recording power correction procedure exceeds a predetermined amount, recording is temporarily stopped, and the test writing procedure A program for executing a recording restart procedure for setting recording power obtained by re-execution of trial writing and restarting recording.
[0015]
  Furthermore, the following (11)When(12And a computer-readable recording medium.
(11) A procedure for concentrating the light beam from the light source on the recording film of the disk-shaped recording medium and writing information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium; Trial writing procedure for determining optimum recording power at the basic linear velocity by performing trial writing in a predetermined area of the medium at a predetermined basic linear velocity, and a predetermined recording state target value during recording information on the disc-shaped recording medium And a value corresponding to the reproduction signal from the disc-shaped recording medium, a recording power correction procedure for correcting the recording power as needed according to the comparison result, and a recording power is set to a predetermined maximum by the recording power correction procedure. To temporarily stop recording when the output value is exceeded and reduce the temperature rise that occurs during recording with the light sourcePredetermined time intervalA recording stop procedure that repeats the process of resuming recording at the recording linear velocity once stopped after a predetermined number of times, and the recording power exceeds a predetermined maximum output value even if the above process is repeated a predetermined number of times by the recording stop procedure The recording linear velocity resetting procedure for resetting the recording linear velocity from the temporarily stopped recording linear velocity by the recording stopping procedure to the predetermined recording linear velocity, and the recording linear velocity reset by the recording linear velocity resetting procedure. A computer-readable recording medium on which a program for executing a recording resumption procedure for resuming recording without interruption of continuous information at the temporarily stopped position after the recording power is determined by the trial writing procedure.
[0016]
(12) A procedure for writing information to a computer with a substantially constant linear density in the circumferential direction of the disc-shaped recording medium, and a trial writing at a predetermined basic linear velocity in a predetermined area of the disc-shaped recording medium, and the basic linear velocity. A trial writing procedure for determining the optimum recording power in the recording medium, and a comparison between a predetermined recording state target value and a value corresponding to a reproduction signal from the disk recording medium while recording information on the disk recording medium. The recording power correction procedure for correcting the recording power as needed according to the result, and when the amount of correction of the recording power corrected by the recording power correction procedure exceeds a predetermined amount, recording is temporarily stopped, and the test writing procedure Set the recording power obtained by re-execution of trial writing by, and read the computer that records the program to execute the recording restart procedure to restart recording Do recording medium.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be specifically described below with reference to the drawings.
  FIG. 1 is a block diagram showing a configuration of an optical disc apparatus according to an embodiment of the present invention.
  This optical disc apparatus records information on an optical disc (disc-shaped recording medium) 100 such as an MO disc, a CD-R / RW disc, a CD + R / RW disc, a DVD-RAM, a DVD-R / RW disc, a DVD + R / RW disc, and the like. An information recording / reproducing apparatus that performs reproduction.
  The rotation motor 102 rotates the optical disc 100.
  The head 103 focuses the light beam on the recording film of the optical disc 100 to form a recording mark. Further, the optical disk 100 can be moved in the radial direction, and a test writing area and a user data area provided in advance on the optical disk 100 can be accessed.
[0018]
  A known laser light source (not shown) is mounted on the head 103. In general, a semiconductor laser (Laser Diode: LD) is used as the laser light source. This laser light source is modulated by an LD driver 104 to a predetermined recording power Pw with an input pulse wdata signal. The laser beam is modulated between the recording power state and the space power state, so that a recording mark and a portion other than the recording mark are formed on the recording film of the optical disc 100. When this is reproduced, a difference in reflectivity occurs, and it can be reproduced as an information signal.
  The CPU 101 controls information recording on the optical disc 100 in the CLV method, ZCLV method, and CAV method. In the case of the ZCLV method, the ZCLV control unit 111 rotates the rotary motor 102 at a predetermined speed, and at the same time stores the current recording speed information in the power calculation unit 109 so as to store or calculate the recording power according to the speed. give. The recording state detection unit 108 samples a reproduction signal from the head 103 during recording at a predetermined timing and sets a value normalized by the recording power as a recording state detection value (referred to as “B value”).
[0019]
  FIG. 2 is a waveform diagram for explaining the operation of the recording state detection unit 108.
  The portion where the “LD power” shown in (b) of FIG. 6 is at a high level is the portion where the recording pulse is generated, and a predetermined timing (marked with ○ in FIG. The reproduction signal (RF signal) is sampled at a point). Further, in order to cancel the difference in the reproduction light amount level depending on the power level, the recording power is divided (normalized).
  As a result, the recording state detection value (B value) is high because the recording mark (low reflection) is not sufficiently formed if the recording power is insufficient, and is too low if the recording power is excessive. .
[0020]
  The power correction unit 107 compares this B value with a predetermined target value.
  The power correcting unit 107 corrects the recording power according to the comparison result. That is, if the B value is smaller than the predetermined target value, the power is excessive, so that the recording power is reduced. On the contrary, if the B value is larger than the target value, the power is insufficient, so that the recording power is increased.
  Thereby, the recording power is controlled so that the recording state becomes optimum. This is the running OPC operation.
  However, since the running OPC generally has a high control speed, it cannot respond immediately at the start of recording. For this reason, some initial value is required as the recording power.
[0021]
  This initial value is initially given from the result of trial writing (OPC).
  The trial writing unit 105 performs trial writing by changing the recording power in a predetermined area of the optical disc 100, reproduces the trial written location, evaluates the reproduction signal, and determines the optimum recording power based on the evaluation result. Get.
  The initial value setting unit 106 sets an initial value of recording power. Since the optimum recording power obtained by the trial writing is the linear velocity at which the trial writing was performed, when performing recording at a linear velocity different from the trial writing as in the CAV method or the ZCLV method, an appropriate calculation (for example, the linear velocity) To obtain the recording power.
  For example, when the optimum recording power Pw0 is obtained at the trial writing linear velocity V0, the recording power Pw1 at another linear velocity V1 is obtained by calculation based on the following equation (1).
[0022]
[Expression 1]
    Pw1 = (V1 / V0) * Pw0
[0023]
  Of course, this calculation may use a more complicated method.
  The power calculation unit 109 calculates the recording power initial value from the linear velocity at the start of recording (or restarts) and gives the initial value to the initial value setting unit 106.
  Therefore, in principle, when additional recording is performed from the position where the previous recording is completed, the recording power is set to the initial value at the end of the previous recording and recording is started.
[0024]
  FIG. 3 is an explanatory diagram showing an example of zone division by the ZCLV method.
  In this example, four zones are provided in accordance with the addresses described on the optical disc 100, and are variable from the inner periphery to 12 × speed (hereinafter referred to as “x”), 16x, 20x, and 24x.
  In the zone switching, for example, the recording power of the next zone is estimated and additionally recorded according to the calculation based on Equation 1 above. At this time, it is possible to perform additional recording with a more optimal recording power by estimating the recording power of the next zone in consideration of not only the recording power at the start of writing of the previous zone but also the recording power change by running OPC.
  A laser light source (LD) may be deteriorated when a high recording power exceeding its rated output is output. In general, the recording power at which the LD deteriorates varies individually. The maximum output level of the optical disk apparatus is determined to such an extent that the LD is not deteriorated in consideration of such LD variations and LD power control system errors.
  The power limit detection unit 110 compares the recording power correction value and the limit value, and the comparison result (detection result) is transmitted to the ZCLV control unit 111.
[0025]
  Next, the first recording process in this optical disc apparatus will be described.
  In this case, the CPU 101 performs test writing at a predetermined basic linear velocity in a predetermined area of the disk-shaped recording medium by means of writing information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium. Test writing means for determining the optimum recording power at the basic linear velocity, and a predetermined recording state target value during recording of information on the disc-shaped recording medium and a value corresponding to a reproduction signal from the disc-shaped recording medium are compared. A recording power correcting means for correcting the recording power as needed according to the comparison result, a recording stopping means for temporarily stopping recording when the recording power exceeds a predetermined maximum output value by the recording power correcting means, and the recording By the recording linear velocity resetting means for resetting the recording linear velocity from the temporarily stopped recording linear velocity to a predetermined recording linear velocity, and the recording linear velocity resetting means After the recording power in the set recording linear velocity was determined by the test writing means, it performs the function of resuming the recording resuming means recording without the once continuous information on stop point is interrupted.
[0026]
  In order for the CPU 101 to realize the functions, a program for executing the functions is installed in advance in a ROM (not shown) in the CPU 101. Further, the above functions may be realized by storing the program in an optical disk such as a CD-ROM disk or a magneto-optical disk such as MO and installing the program in the memory of the CPU 101 via the disk. Furthermore, the program may be installed from an external terminal device via wireless or wired communication.
[0027]
  FIG. 4 is a flowchart showing a first recording process in the optical disc apparatus shown in FIG.
  In the process of writing information at a substantially constant linear density in the circumferential direction of the optical disk, the CPU 101 performs test writing at a predetermined basic linear velocity in a predetermined area of the optical disk in step (indicated by “S” in the figure) 1. The optimum recording power at the basic linear velocity is determined, information is recorded with a substantially constant linear density in the circumferential direction of the optical disc at the linear velocity Nx, and a predetermined recording state during recording of information on the optical disc by running OPC in step 2 The target value is compared with a value corresponding to the reproduction signal from the optical disk, and the recording power is corrected as needed according to the comparison result. In step 3, the corrected recording power is a limit value (predetermined maximum output value). It is judged whether or not.
[0028]
  If the recording power corrected in the determination in step 3 does not exceed the limit value, the process returns to the first processing and the above processing is repeated during information recording. If it exceeds, the recording is temporarily stopped in step 4 and then in step 5 The recording linear velocity at the time of the temporary stop is lowered to a predetermined recording linear velocity, for example, the set linear velocity is lowered by one step and reset, and the recording power at the reset recording linear velocity in step 6 is set to OPC ( After the determination by trial writing), in step 7, the recording is resumed without interruption of continuous information at the stop position with the determined recording power, and this processing is terminated.
[0029]
  In this way, when the recording power corrected by the running OPC exceeds or is about to exceed the limit, the recording is temporarily stopped, the recording linear velocity is lowered by one step, the OPC is re-executed, and the recording is resumed. .
  According to the first recording process, the recording speed is reduced and the trial writing is re-executed before the recording power reaches the maximum settable value by correcting the recording power during recording, so that the recording can be performed while preventing the laser light source from deteriorating. The recording power can be accurately determined by reflecting the change in conditions such as the temperature changed inside, and high-quality recording can be realized with a minimum increase in recording time.
[0030]
  Next, the second recording process in this optical disc apparatus will be described.
  In this case, the CPU 101 performs test writing at a predetermined basic linear velocity in a predetermined area of the disk-shaped recording medium by means of writing information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium. Test writing means for determining the optimum recording power at the basic linear velocity, and a predetermined recording state target value during recording of information on the disc-shaped recording medium and a value corresponding to a reproduction signal from the disc-shaped recording medium are compared. The function of the recording power correcting means for correcting the recording power at any time according to the comparison result is achieved.
[0031]
  Further, when the recording power exceeds a predetermined maximum output value by the recording power correcting means, the recording is temporarily stopped to reduce the temperature rise that occurs during the recording of the light source.Predetermined time intervalA recording stop unit that repeats the process of resuming recording at the recording linear velocity at the time of stop after being set, and the recording power exceeds a predetermined maximum output value even if the above process is repeated a predetermined number of times by the recording stop unit The recording linear velocity resetting means for resetting from the recording linear velocity at the time of temporary stop by the recording stop means to a predetermined recording linear velocity, and the recording linear velocity reset by the recording linear velocity resetting means After the recording power is determined by the test writing means, the recording resume means functions to resume the recording without interruption of the continuous information at the temporary stop.
[0032]
  In order for the CPU 101 to realize the functions, a program for executing the functions is installed in advance in a ROM (not shown) in the CPU 101. Further, the above functions may be realized by storing the program in an optical disk such as a CD-ROM disk or a magneto-optical disk such as MO and installing the program in the memory of the CPU 101 via the disk. Furthermore, the program may be installed from an external terminal device via wireless or wired communication.
[0033]
  FIG. 5 is a flowchart showing a second recording process in the optical disc apparatus shown in FIG.
  In the process of writing information at a substantially constant linear density in the circumferential direction of the optical disk, the CPU 101 performs test writing at a predetermined basic linear velocity in a predetermined area of the optical disk in step (indicated by “S” in the figure) 11. The optimum recording power at the basic linear velocity is determined, information is recorded with a substantially constant linear density in the circumferential direction of the optical disc at the linear velocity Nx, and a predetermined recording state is recorded while information is recorded on the optical disc by running OPC in step 12 The target value is compared with the value corresponding to the reproduction signal from the optical disc, and the recording power is corrected as needed according to the comparison result. In step 13, the corrected recording power is the limit value (predetermined maximum output value). If it does not exceed, the process returns to the first process and the above process is repeated during information recording.
[0034]
  If the limit value is exceeded in step 13, recording is temporarily stopped in step 14, and after a predetermined time interval, it is determined in step 15 whether or not the recording stop is less than a predetermined number. Returning to the above process, the above process is repeated, and if it is not less than the predetermined number of times (if the predetermined number is exceeded), that is, if the recording power exceeds the predetermined maximum output value even if the above process is repeated a predetermined number of times, step 16 The recording linear velocity at the time of stopping is lowered to a predetermined recording linear velocity, for example, the set linear velocity is lowered by one step and reset, and the recording power at the reset recording linear velocity in step 17 is set to OPC ( After the determination by trial writing), the recording is resumed without interruption of continuous information at the stop position at the recording power determined in step 18 and this processing is ended.
[0035]
  In this way, when the power limit is reached, recording is first stopped for a certain period of time and writing is resumed. If the limit is still reached, the process is stopped for a certain period of time and the writing is resumed a predetermined number of times, and the limit is reached. In this case, the recording linear velocity is lowered for the first time.
  According to the second recording process, when the power limit is reached, the recording is temporarily stopped, and after being stopped for a certain period of time, the recording power change due to the temperature rise during the recording can be reduced.
  Therefore, by preventing the linear velocity from being lowered unnecessarily, the recording time can be prevented from being extended to the minimum, and recording is performed at the fastest possible speed while minimizing the burden on the laser light source. Can do.
[0036]
  Next, the third recording process in this optical disc apparatus will be described.
  The reason why the optimum value of the recording power changes during recording may be due to a change in the laser wavelength due to a temperature change or a change in the in-plane state of the recording medium. There may be a case where it deviates from the true optimum recording power at the time.
  Therefore, in this third recording process, even when there is a large change in recording power due to running OPC, there is a high possibility that the error from the actual optimum recording power is large. And re-execute OPC.
[0037]
  In this case, the CPU 101 performs test writing at a predetermined basic linear velocity in a predetermined area of the disk-shaped recording medium by means of writing information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium. Test writing means for determining the optimum recording power at the basic linear velocity, and a predetermined recording state target value during recording of information on the disc-shaped recording medium and a value corresponding to a reproduction signal from the disc-shaped recording medium are compared. Recording power correction means for correcting the recording power at any time according to the result of the comparison, and when the amount of correction of the recording power corrected by the recording power correction means exceeds a predetermined amount, recording is temporarily stopped, It fulfills the function of a recording resumption means for setting the recording power obtained by re-execution of the trial writing by the trial writing means and resuming the recording.
[0038]
  In order for the CPU 101 to realize the functions, a program for executing the functions is installed in advance in a ROM (not shown) in the CPU 101. Further, the above functions may be realized by storing the program in an optical disk such as a CD-ROM disk or a magneto-optical disk such as MO and installing the program in the memory of the CPU 101 via the disk. Furthermore, the program may be installed from an external terminal device via wireless or wired communication.
[0039]
  FIG. 6 is a flowchart showing a third recording process in the optical disc apparatus shown in FIG.
  In the process of writing information at a substantially constant linear density in the circumferential direction of the optical disk, the CPU 101 performs test writing at a predetermined basic linear velocity in a predetermined area of the optical disk in step (indicated by “S” in the figure) 21. The optimum recording power at the basic linear velocity is determined, information is recorded at a linear velocity Nx at a substantially constant linear density in the circumferential direction of the optical disc, and a predetermined recording state is recorded while information is recorded on the optical disc by running OPC in step 22 The target value is compared with a value corresponding to the reproduction signal from the optical disc, the recording power is corrected as needed according to the comparison result, and whether or not the corrected recording power correction amount exceeds a predetermined amount in step 23. If it does not exceed, return to the first process and repeat the above process.
[0040]
  When the correction amount of the recording power corrected in the determination in step 23 exceeds a predetermined amount, the recording is temporarily stopped in step 24, and the test writing is re-executed by OPC (test writing) in step 25 to re-acquire the recording power. In step 26, the recording power is set and recording is resumed, and this process is terminated.
  According to the third recording process, when the power limit is reached, recording is temporarily stopped, test writing is performed again, and the true optimum recording power at that time is obtained and recorded, so that higher quality recording can be performed. .
[0041]
  Next, the fourth recording process in this optical disc apparatus will be described.
  Since the largest factor that changes the recording power due to the running OPC is the LD temperature rise due to the recording power output, such a change in recording power can be suppressed to some extent by stopping the recording and lowering the temperature.
  Therefore, in the fourth recording process, the recording power is obtained more accurately by executing the OPC at the actual recording speed.
  For example, Orange Book Part 2, Volume 2, Version 1.1 (Orange Book part2 volume2 ver1.1) defines a power calibration area in the outer peripheral area of a CD-R disc. By using this, OPC at the actual write speed can be performed.
[0042]
  In this case, the CPU 101 functions as means for performing trial writing at a linear velocity when the recording is resumed with respect to a predetermined area provided in the outer peripheral portion of the disc-shaped recording medium. Therefore, a program for realizing this function by the CPU 101 is added to the above program.
  Then, in the first to third processes described above, the CPU 101 performs OPC (trial writing) at a linear velocity when the recording is resumed with respect to a predetermined area provided on the outer periphery of the optical disc 100.
  According to the fourth recording process, trial writing is performed at a linear velocity at the time of resuming recording in a predetermined area provided on the outer peripheral portion of the recording medium, so that recording with higher quality can be performed.
[0043]
  Next, a fifth recording process in this optical disc apparatus will be described.
  As described above, the maximum output power of the optical disk apparatus is determined with a considerable margin so as not to deteriorate the LD. Particularly, in the case of pulse emission as in recording, even if the power is slightly increased, the damage is caused if the power is increased for a short time. Not too much. The recording power correction by the running OPC is performed during recording, and since the remaining recording time is short, there may be no problem even if the set power is slightly increased.
  Therefore, in the fifth recording process, the recording power increase by the running OPC is allowed by a predetermined value rather than the limit applied to the power at the start of recording.
  Of course, the setting of the predetermined value must be determined with care to the extent that the LD is not damaged, but the number of scenes where the recording speed must be reduced due to the running OPC can be greatly reduced.
[0044]
  In this case, the recording power is higher than the allowable maximum recording power applied to the recording power at the start of recording, which is estimated and set from the result of the trial writing by the test writing means before the start of recording. The correction means serves to increase the recording power allowable value corrected during recording by a predetermined value. Therefore, a program for realizing this function by the CPU 101 is added to the above program.
  In the first to fourth processes, the CPU 101 allows the maximum recording power to be applied to the recording power at the start of recording that is estimated and set from the result of OPC (trial writing) before the start of recording. Rather, the recording power correction has a recording power tolerance that is corrected during recording by a predetermined value.
[0045]
  According to the fifth recording process, since the increase in the required recording power due to the correction of the recording power during recording is reduced in the remaining recording time, the burden on the laser light source is small even if the power is slightly increased. By increasing the maximum recording power value by, the occurrence of a decrease in recording speed can be suppressed, and the maximum possible recording speed can be realized.
[0046]
  Next, in this optical disc apparatusRecord processing of reference technologyWill be described.
  If OPC is executed before recording starts, the recording power in each zone is estimated by the ZCLV control unit 111. At that time, the power that has not exceeded the limit is exceeded when the zone is switched by correcting the recording power by running OPC. May end up. Setting the recording power in consideration of the recording power change due to the correction of the recording power during the recording up to the previous zone at the start of recording in the next zone is necessary to set the optimum recording power, but it may exceed the limit Correction of the recording power must be avoided.
  Therefore,Reference technologyIn this recording process, the recording power at the recording speed of the new zone is estimated from the recording power at that time immediately before the end position of the zone, and when the limit is exceeded, the recording is continued without changing the recording speed.
[0047]
  In this case, the CPU 101 writes information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium at a predetermined linear velocity that is different for each of a plurality of recording zones provided in the radial direction of the disk-shaped recording medium. Test writing means for performing trial writing in a predetermined area of the disc-shaped recording medium at a predetermined basic linear velocity to determine an optimum recording power at the basic linear velocity, and during recording information on the disc-shaped recording medium A recording power correcting means for comparing a predetermined recording state target value with a value corresponding to a reproduction signal from the disc-shaped recording medium, and correcting the recording power as needed according to the comparison result, and a switching point of the recording zone The recording power immediately before switching corrected by the recording power correcting means during recording up to the previous recording zone as the recording power of the new recording zone in FIG. On the other hand, if the recording power is estimated from the result of performing the predetermined recording power determination process and it is determined that the recording power exceeds the predetermined maximum recording power, the recording is continued without stopping while maintaining the previous recording speed. Serves as a means.
[0048]
  In order for the CPU 101 to realize the functions, a program for executing the functions is installed in advance in a ROM (not shown) in the CPU 101. Further, the above functions may be realized by storing the program in an optical disk such as a CD-ROM disk or a magneto-optical disk such as MO and installing the program in the memory of the CPU 101 via the disk. Furthermore, the program may be installed from an external terminal device via wireless or wired communication.
[0049]
  FIG. 7 shows the optical disc apparatus shown in FIG.Reference technologyIt is a flowchart figure which shows the recording process.
  The CPU 101 performs a step (indicated by “S” in the figure) in a process of writing information with a substantially constant linear density in the circumferential direction of the optical disc at a predetermined linear velocity that differs for each of a plurality of recording zones provided in the radial direction of the optical disc. 31) Trial writing is carried out at a predetermined basic linear velocity in a predetermined area of the optical disc to determine the optimum recording power at the basic linear velocity, and the zone 1 (first zone) is set in the circumferential direction of the optical disc at the linear velocity Nx. Information is recorded with a substantially constant linear density. During recording of information on the optical disk in step 32, a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the optical disk, and depending on the comparison result, the information is recorded as needed. The recording power when the recording power is corrected and the linear velocity is increased by one step from Nx before the end position of zone 1 (the recording power of the new recording zone at the recording zone switching point) Estimating a recording power) from the result obtained by performing a predetermined recording power determination process on the modified immediately before switching of the recording power during the recording immediately before the recording zone and.
[0050]
  In step 33, it is determined whether or not the estimated recording power exceeds a limit value (predetermined maximum recording power). If it is determined that the estimated recording power exceeds the limit, in step 36, the linear velocity Nx which is the immediately preceding recording velocity is maintained. The recording of the zone 2 (second zone) is resumed without continuing, and the recording is continued.
  If it is determined in step 33 that the estimated recording power does not exceed the limit value, the recording is temporarily stopped in step 34, the linear velocity is increased by one step from Nx in step 35, and the recording in zone 2 is resumed. The process ends.
  thisReference technologyAccording to this recording process, when the recording power exceeds the maximum value due to the influence of the correction amount of the recording power, the recording speed is kept unchanged without stopping the recording. The recording can be performed at the maximum recording speed in consideration of the burden on the presser and the laser light source.
[0051]
  next,Record processing of other reference technologiesIs temporarily stopped at the zone end position, and when the recording power of the new zone is obtained by re-executing OPC, if the limit is still exceeded, recording is resumed while maintaining the speed of the old zone.
  In this case, the CPU 101 writes information with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium at a predetermined linear velocity that is different for each of a plurality of recording zones provided in the radial direction of the disk-shaped recording medium. And a trial writing means for determining the optimum recording power at the basic linear velocity by performing trial writing at a predetermined basic linear velocity in a predetermined area of the disc-shaped recording medium.
[0052]
  Also, while recording information on the disc-shaped recording medium, a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the disc-shaped recording medium, and the recording power is corrected as needed according to the comparison result. Recording power correcting means for recording, and recording at the switching point of the recording zone, and recording power immediately before switching corrected by the recording power correcting means during recording up to the previous recording zone as the recording power of the new recording zone When the recording power is estimated from the result of performing the predetermined recording power determination processing on the recording medium and it is determined that the recording power exceeds the predetermined maximum recording power, the test writing is re-executed by the test writing unit. It functions as a recording restarting means for setting recording power and restarting recording.
[0053]
  In order for the CPU 101 to realize the functions, a program for executing the functions is installed in advance in a ROM (not shown) in the CPU 101. Further, the above functions may be realized by storing the program in an optical disk such as a CD-ROM disk or a magneto-optical disk such as MO and installing the program in the memory of the CPU 101 via the disk. Furthermore, the program may be installed from an external terminal device via wireless or wired communication.
[0054]
  FIG. 8 shows the optical disk apparatus shown in FIG.Other reference technologiesIt is a flowchart figure which shows the recording process.
  The CPU 101 performs a step (indicated by “S” in the figure) in a process of writing information with a substantially constant linear density in the circumferential direction of the optical disc at a predetermined linear velocity that differs for each of a plurality of recording zones provided in the radial direction of the optical disc. ) 41, trial writing is performed at a predetermined basic linear velocity in a predetermined area of the optical disc to determine the optimum recording power at the basic linear velocity, and the zone 1 (first zone) is set in the circumferential direction of the optical disc at the linear velocity Nx. Information is recorded with a substantially constant linear density, and a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the optical disk while recording information on the optical disk in step 42, and depending on the result of the comparison The recording power is corrected, recording is temporarily stopped at the end position (switching point) of zone 1, and the recording power when the linear velocity is increased by one step from Nx in step 43 (new recording) Estimating a recording power) from the result obtained by performing a predetermined recording power determination process on the modified immediately before switching of the recording power during the recording immediately before the recording zone as a recording power of over emissions.
[0055]
  In step 44, it is determined whether or not the estimated recording power exceeds a limit value (predetermined maximum recording power). If it is determined that the estimated recording power does not exceed the limit value, the linear velocity is increased by one step from Nx in step 48 and the zone 2 (second The recording of the zone) is resumed and recording continues, and this processing is terminated.
  If the estimated recording power exceeds the limit value in the determination of step 44, OPC (trial writing) is re-executed in step 45, and the recording power of zone 2 is estimated by the re-execution, and the estimated recording power is limited in step 46. If it is determined whether or not the value is exceeded, it is determined that the value is not exceeded. In step 48, the linear velocity is increased by one step from Nx, and the recording in the zone 2 (second zone) is resumed to continue the recording. To do.
  If the estimated recording power exceeds the limit value in step 46, the recording in zone 2 (second zone) is resumed and recorded in step 47 without stopping while maintaining the linear velocity Nx which is the previous recording velocity. Then, this process is finished.
[0056]
  thisOther reference technologiesWhen the recording power is set in consideration of the recording power change due to the recording power correction during recording up to the previous zone at the start of recording of the next zone at the zone break, the maximum recording power is exceeded. In this case, since the optimum recording power is obtained again in the test writing area, the zone speed may be increased and recording can be performed at the maximum recording speed.
[0057]
  Next, the present inventionInformation processing equipment of reference technologyexplain.
  FIG. 9 shows the present invention.Information processing equipment of reference technologyIt is a functional block diagram which shows the apparatus schematic structure.
  The information processing apparatus includes a main control device 21, an interface 22, a storage device (HDD) 23, an input device 24, a display device 25, and the like, and an information recording device (optical disk drive) 20 is connected via the interface 22. is doing.
  The main control device (host computer) 21 includes a microcomputer (CPU), a main memory (both are well-known and not shown), and controls the entire information processing device.
[0058]
  The interface 22 is a bidirectional communication interface with the optical disc drive 20 and conforms to standard interfaces such as ATAPI and SCSI. This interface 22 is connected to the interface of the optical disc drive 20. The connection form between the interfaces may be not only a cable connection using a communication line such as a communication cable (for example, a SCSI cable) but also a wireless connection using infrared rays.
  A storage device (hard disk drive: HDD) 23 stores a program written in a code readable by the microcomputer of the main control device 21. Note that when the drive power supply of the information processing apparatus is turned on, the program is loaded into the main memory of the main control apparatus.
[0059]
  The display device 25 includes a display unit (not shown) such as a CRT, a liquid crystal display (LCD), and a plasma display panel (PDP), and displays various information from the main control device 21.
  The input device 24 includes at least one input medium (not shown) of, for example, a keyboard, a mouse, and a pointing device, and notifies the main control device 21 of various information input by the user.
  Information from the input device 24 may be input by a wireless method. Further, as an integrated display device 25 and input device 24, for example, there is a CRT with a touch panel.
  The information processing apparatus is equipped with an operating system (hereinafter referred to as “OS”). All devices constituting the information processing apparatus are managed by the OS.
[0060]
  FIG. 10 is a functional block diagram showing an example of a main configuration of the information recording apparatus (optical disc drive) shown in FIG.
  This optical disk drive includes a spindle motor 2, an optical pickup 3, a laser controller 4, a CD encoder 5, a CD-ROM encoder 6, an ATIP decoder 7, a buffer RAM 8, a buffer manager 9, a read amplifier 10, a CD decoder 11, and a CD-ROM decoder. 12, ATAPI / SCSI interface (I / F) 13, motor driver 14, servo unit 15, D / A converter 16, ROM 17, CPU 18, RAM 19, and the like. In FIG. 10, the arrows indicate the direction in which data mainly flows. In order to simplify the drawing, the CPU 18 that controls each block in FIG. Is omitted.
[0061]
  The ROM 17 stores a control program written in a code readable by the CPU 18.
  When the power of the optical disk drive is turned on, the program is loaded into a well-known main memory (not shown), and the CPU 18 controls the operation of each unit according to the program and temporarily stores data necessary for the control. The data is stored in the RAM 19.
  The optical disc 1 is, for example, a CD-R (CD recordable) disc that can be written only once (also referred to as CD-Write Once), or a CD-E that can be written a plurality of times (CD erasable). There is a disk (CD-RW: also called CD rewritable). There are also disk-shaped recording media such as MO disks, CD + R / RW disks, DVD-RAM, DVD-R / RW disks, and DVD + R / RW disks.
[0062]
  The spindle motor 2 rotationally drives the optical disc 1. The spindle motor 2 is controlled by the motor driver 14 and the servo unit 15 so that the linear velocity is constant. This linear velocity can be changed stepwise.
  The optical pickup 3 includes a known semiconductor laser, optical system, focus actuator, track actuator, light receiving element, and position sensor (not shown), and irradiates the optical disc 1 with the laser beam LB.
  The optical pickup 3 can be moved in the sledge direction by a seek motor. These focus actuator, track actuator, and seek motor are configured so that the spot of the laser beam LB is positioned at a target location on the optical disc 1 by the motor driver 14 and the servo unit 15 based on signals obtained from the light receiving element and the position sensor. Controlled.
[0063]
  At the time of reading, the reproduction signal obtained by the optical pickup 3 is amplified and binarized by the read amplifier 10 and then input to the CD decoder 11. The input binarized data is demodulated by the CD decoder 11 with EFM (Eight to Fourteen Modulation).
  Note that the recording data is EFM modulated by collecting 8 bits at a time. In this EFM modulation, 8 bits are converted to 14 bits, and 3 bits are added to form a combined bit to make a total of 17 bits.
  In this case, the combined bits are attached so that the number of previous “1” s and “0” s are equal on average. This is called “DC component suppression”, and the slice level fluctuation of the DC-cut reproduction signal is suppressed.
[0064]
  The demodulated data is subjected to deinterleaving and error correction. Thereafter, this data is input to the CD-ROM decoder 12, and further error correction processing is performed in order to increase the reliability of the data.
  In this way, the data that has been subjected to the error correction processing twice is temporarily stored in the buffer RAM 8 by the buffer manager 9 and is processed as an information process through the ATAPI / SCSI I / F 13 in a state in which the data is prepared as sector data. The data is transferred at once to the main controller (host computer) of the apparatus.
  In the case of music data, the data output from the CD decoder 11 is input to the D / A converter 16 and extracted as an analog audio output signal Audio.
[0065]
  At the time of writing, data sent from the host computer through the ATAPI / SCSI I / F 13 is temporarily stored in the buffer RAM 8 by the buffer manager 9.
  The write operation is started in a state where a certain amount of data is accumulated in the buffer RAM 8. In this case, it is necessary to position the laser spot at the write start point before that. This point is obtained by a wobble signal preliminarily carved on the optical disc 1 by meandering tracks.
  The wobble signal includes absolute time information called ATIP, and this information is extracted by the ATIP decoder 7.
  The synchronization signal generated by the ATIP decoder 7 is input to the CD encoder 5 so that data can be written at an accurate position on the optical disc 1.
[0066]
  Data in the buffer RAM 8 is subjected to error correction code addition and interleaving in the CD-ROM encoder 6 and the CD encoder 5, and is recorded on the optical disk 1 through the laser controller 4 and the optical pickup 3.
  The EFM modulated data drives the laser as a bit stream at a channel bit rate of 4.3218 Mbps (standard speed). The recording data in this case constitutes an EFM frame in units of 588 channel bits. The channel clock means a clock having a frequency of this channel bit.
[0067]
  Then, the CPU 18 of the optical disk drive 20 performs the first to first operations described above.5ProcessingAnd reference technology processingThis corresponds to a functional unit that executes. Since the contents of the process have been described above, the description thereof will be omitted. In this way, even in an information processing apparatus with an optical disk drive connected to or built into a personal computer, it is possible to prevent the occurrence of problems that exceed the maximum output of the laser light source due to the effect of power correction by running OPC, and deteriorate the laser light source. Without recording, it is possible to realize high recording quality by recording information at the fastest recording speed and the optimum recording power.
[0068]
【The invention's effect】
  As described above, according to the information recording apparatus and the information recording method of the present invention, it is possible to prevent the occurrence of problems that exceed the maximum output of the laser light source due to the effect of power correction by running OPC and to deteriorate the laser light source. Therefore, high recording quality can be realized by recording information at the fastest recording speed and optimum recording power. Further, according to the program of the present invention and the computer-readable recording medium, the computer can easily realize the recording function according to the present invention.it can.
[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.
FIG. 2 is a waveform diagram for explaining the operation of a recording state detection unit shown in FIG.
FIG. 3 is an explanatory diagram showing an example of zone division by the ZCLV method.
FIG. 4 is a flowchart showing a first recording process in the optical disc apparatus shown in FIG. 1;
FIG. 5 is a flowchart showing a second recording process in the optical disc apparatus shown in FIG. 1;
FIG. 6 is a flowchart showing a third recording process in the optical disc apparatus shown in FIG. 1;
7 in the optical disc apparatus shown in FIG.Reference technologyIt is a flowchart figure which shows the recording process.
8 is a diagram of the optical disc apparatus shown in FIG.Other reference technologiesIt is a flowchart figure which shows the recording process.
FIG. 9 shows the present invention.Information processing equipment of reference technologyIt is a functional block diagram which shows the apparatus schematic structure.
10 is a functional block diagram showing an example of a main part configuration of the information recording apparatus shown in FIG. 9;
[Explanation of symbols]
1,100: Optical disk 2: Spindle motor
3: Optical pickup 4: Laser controller
5: CD encoder 6: CD-ROM encoder
7: ATIP decoder 8: Buffer RAM
9: Buffer manager 10: Read amplifier
11: CD decoder 12: CD-ROM decoder
13: ATAPI / SCSI / I / F
14: Motor driver 15: Servo section
16: D / A converter 17: ROM
18, 101: CPU 19: RAM
20: Information recording device 21: Main control device
22: Interface 23: Storage device
24: Input device 25: Display device
102: Rotating motor 103: Head
104: LD driver 105: Trial writing part
106: Initial value setting unit 107: Power correction unit
108: Recording state detection unit 109: Power calculation unit
110: Power limit detection unit
111: ZCLV control unit LB: Laser light

Claims (12)

An information recording apparatus for writing information with a substantially constant linear density in the circumferential direction of a disk-shaped recording medium,
A light source for condensing a light beam on the recording film of the disk-shaped recording medium;
Test writing means for performing test writing at a predetermined basic linear velocity on a predetermined area of the disc-shaped recording medium to determine an optimum recording power at the basic linear velocity;
A recording in which a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the disk-shaped recording medium while information is recorded on the disk-shaped recording medium, and the recording power is corrected at any time according to the comparison result. Power correction means;
When the recording power exceeds the predetermined maximum output value by the recording power correcting means, the recording is temporarily stopped after a predetermined time interval to reduce the temperature rise that occurs during recording of the light source. Recording stop means for repeating the process of restarting recording at a predetermined number of times;
If the recording power exceeds a predetermined maximum output value even if the processing is repeated a predetermined number of times by the recording stop means, the recording linear speed at the time of the stop by the recording stop means is lowered to a predetermined recording linear speed and reset. Recording linear velocity resetting means,
And a recording resumption means for resuming recording without continuation of continuous information at the temporary stop after the recording power at the recording linear velocity reset by the recording linear velocity resetting means is determined by the test writing means. An information recording apparatus characterized by that. An information recording apparatus for writing information with a substantially constant linear density in the circumferential direction of a disk-shaped recording medium,
Test writing means for performing test writing at a predetermined basic linear velocity on a predetermined area of the disc-shaped recording medium to determine an optimum recording power at the basic linear velocity;
A recording in which a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the disk-shaped recording medium while information is recorded on the disk-shaped recording medium, and the recording power is corrected at any time according to the comparison result. Power correction means;
Recording is temporarily stopped when the amount of correction of the recording power corrected by the recording power correction means exceeds a predetermined amount, and recording is performed by setting the recording power obtained by re-execution of the trial writing by the test writing means. An information recording apparatus comprising: a recording resuming unit that resumes recording.   3. The information recording apparatus according to claim 1 or 2, further comprising means for performing trial writing at a linear velocity when the recording is resumed with respect to a predetermined area provided on an outer peripheral portion of the disc-shaped recording medium. A characteristic information recording apparatus.   4. The information recording apparatus according to claim 1, wherein the maximum is applied to a recording power at the start of recording set by estimation from a result of trial writing by the trial writing unit before starting recording. An information recording apparatus characterized in that an allowable value of recording power corrected during recording by the recording power correcting means is larger by a predetermined value than an allowable value of recording power. An information recording method for concentrating a light beam from a light source on a recording film of a disk-shaped recording medium and writing information with a substantially constant linear density in a circumferential direction of the disk-shaped recording medium, the disk-shaped recording Trial writing is performed in a predetermined area of the medium at a predetermined basic linear velocity to determine an optimum recording power at the basic linear velocity, and a predetermined recording state target value and the disk-shaped information are recorded during recording of information on the disk-shaped recording medium. Compare with the value corresponding to the playback signal from the recording medium, modify the recording power as needed according to the comparison result, and temporarily stop recording when the modified recording power exceeds the predetermined maximum output value Repeat once a predetermined number of times to resume processing the recording the stop-state of the recording linear velocity after had a predetermined time interval to reduce the temperature rise occurring during the recording of the light source Te, even the process is repeated for a predetermined number of times When the recording power exceeds a predetermined maximum output value, the recording linear velocity at the time of temporary stop is lowered to a predetermined recording linear velocity, and the recording power at the reset recording linear velocity is reset. After the determination, the information recording method is characterized in that the recording is resumed without interruption of the continuous information at the temporary stop.   An information recording method for writing information at a substantially constant linear density in a circumferential direction of a disc-shaped recording medium, wherein the basic linear velocity is obtained by performing trial writing in a predetermined area of the disc-shaped recording medium at a predetermined basic linear velocity. The optimum recording power is determined, and a predetermined recording state target value is compared with a value corresponding to a reproduction signal from the disk-shaped recording medium while information is recorded on the disk-shaped recording medium, and the comparison result is determined. The recording power is corrected at any time, and when the corrected amount at any time of the corrected recording power exceeds a predetermined amount, recording is temporarily stopped, and the recording power obtained by re-execution of the test writing by the test writing is set. And resuming the recording. The information recording method according to claim 5 or 6, wherein the information and performs test writing at a linear velocity at the time of resuming the recording to a predetermined region provided on the outer periphery portion of the disc-shaped recording medium Recording method. The information recording method according to any one of claims 5 to 7 , wherein the maximum recording is applied to a recording power at a recording start that is set by estimation from a result of trial writing by the trial writing before starting recording. An information recording method characterized in that a recording power tolerance corrected during recording is larger than a power tolerance by a predetermined value. A step of concentrating a light beam from a light source on a recording film of a disk-shaped recording medium and writing information with a substantially constant linear density in a circumferential direction of the disk-shaped recording medium; A trial writing procedure for determining the optimum recording power at the basic linear velocity by performing trial writing in the predetermined area at a predetermined basic linear velocity, and a predetermined recording state target value during recording of information on the disc-shaped recording medium, A recording power correction procedure for comparing a value according to a reproduction signal from the disk-shaped recording medium and correcting the recording power as needed according to the comparison result, and a recording power at a predetermined maximum output by the recording power correction procedure once resume recording the stop-state of the recording linear velocity after had a predetermined time interval to record temporarily stopped to reduce the temperature rise occurring during the recording of said light source when it exceeds the value If the recording power exceeds a predetermined maximum output value even if the processing is repeated a predetermined number of times according to the recording stop procedure, and the recording linear velocity at the time of the temporary stop by the recording stop procedure The recording linear velocity resetting procedure for resetting the recording linear velocity to a predetermined recording linear velocity, and the recording power at the recording linear velocity reset by the recording linear velocity resetting procedure is determined by the test writing procedure, and then temporarily stopped. A program for executing a recording resumption procedure for resuming recording without interruption of continuous information at a location.   A procedure for writing information to a computer with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium, and a trial writing at a predetermined basic linear velocity in a predetermined area of the disk-shaped recording medium, The test writing procedure for determining the optimum recording power was compared with a predetermined recording state target value during recording information on the disc-shaped recording medium and a value corresponding to a reproduction signal from the disc-shaped recording medium, and the comparison was made. Recording power correction procedure for correcting the recording power at any time according to the result, and when the correction amount at any time of the recording power corrected by the recording power correction procedure exceeds a predetermined amount, the recording is temporarily stopped, and the test writing procedure A program for executing a recording restart procedure for setting recording power obtained by re-execution of test writing and restarting recording. A step of concentrating a light beam from a light source on a recording film of a disk-shaped recording medium and writing information with a substantially constant linear density in a circumferential direction of the disk-shaped recording medium; A trial writing procedure for determining the optimum recording power at the basic linear velocity by performing trial writing in the predetermined area at a predetermined basic linear velocity, and a predetermined recording state target value during recording of information on the disc-shaped recording medium, A recording power correction procedure for comparing a value according to a reproduction signal from the disk-shaped recording medium and correcting the recording power as needed according to the comparison result, and a recording power at a predetermined maximum output by the recording power correction procedure once resume recording the stop-state of the recording linear velocity after had a predetermined time interval to record temporarily stopped to reduce the temperature rise occurring during the recording of said light source when it exceeds the value If the recording power exceeds a predetermined maximum output value even if the processing is repeated a predetermined number of times according to the recording stop procedure, and the recording linear velocity at the time of the temporary stop by the recording stop procedure The recording linear velocity resetting procedure for resetting the recording linear velocity to a predetermined recording linear velocity, and the recording power at the recording linear velocity reset by the recording linear velocity resetting procedure is determined by the test writing procedure, and then temporarily stopped. A computer-readable recording medium recording a program for executing a recording resumption procedure for resuming recording without interruption of continuous information at a location.   A procedure for writing information to a computer with a substantially constant linear density in the circumferential direction of the disk-shaped recording medium, and a trial writing at a predetermined basic linear velocity in a predetermined area of the disk-shaped recording medium, The test writing procedure for determining the optimum recording power was compared with a predetermined recording state target value during recording information on the disc-shaped recording medium and a value corresponding to a reproduction signal from the disc-shaped recording medium, and the comparison was made. Recording power correction procedure for correcting the recording power at any time according to the result, and when the correction amount at any time of the recording power corrected by the recording power correction procedure exceeds a predetermined amount, the recording is temporarily stopped, and the test writing procedure A computer-readable recording of a program for executing the recording restart procedure for restarting recording by setting the recording power obtained by re-execution of test writing Recording medium.

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