WO2005034109A1 - 情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法並びにコンピュータプログラム - Google Patents
情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法並びにコンピュータプログラム Download PDFInfo
- Publication number
- WO2005034109A1 WO2005034109A1 PCT/JP2004/014151 JP2004014151W WO2005034109A1 WO 2005034109 A1 WO2005034109 A1 WO 2005034109A1 JP 2004014151 W JP2004014151 W JP 2004014151W WO 2005034109 A1 WO2005034109 A1 WO 2005034109A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- recording
- information
- set value
- information recording
- recorded
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 51
- 238000004590 computer program Methods 0.000 title claims description 40
- 238000012937 correction Methods 0.000 claims abstract description 118
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 11
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 description 57
- 230000008859 change Effects 0.000 description 20
- 230000006870 function Effects 0.000 description 16
- 238000012545 processing Methods 0.000 description 13
- 230000008901 benefit Effects 0.000 description 11
- 230000004044 response Effects 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012067 mathematical method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
- G11B7/1267—Power calibration
Definitions
- Information recording medium information recording apparatus and method, information recording / reproducing apparatus and method, and computer program
- the present invention relates to a technical field of an information recording device and method such as a DVD recorder, an information recording and reproducing device and method, and a computer program for causing a computer to function as such an information recording device or information recording and reproducing device.
- the recording power is determined by OPC (Optimum Power Calibration) processing according to the type of the optical disk, the type of the information recording / reproducing apparatus, the recording speed, and the like.
- the optimal power at is set. That is, calibration (calibration) of the recording power is performed.
- an appropriate recording operation can be realized. For example, when an optical disk is loaded and a write command is input, the light intensity is switched step by step, data for test writing is recorded in the power calibration area, and so-called test writing processing is executed.
- the test writing data recorded in this manner is reproduced, and the reproduction result is determined based on a predetermined evaluation criterion, and the optimum power is set. Further, in the information recording apparatus disclosed in Patent Document 1, the recording power obtained by OPC is corrected based on the reproduction quality obtained by reproducing the actually recorded data.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-297439
- Patent Document 1 in order to correct the recording power, it is necessary to record data in a target recording area, and the data is recorded, and the recording noise in the recording area is corrected. There is also a technical problem that is difficult or impossible.
- the present invention has been made in view of, for example, the conventional problems described above, and enables information to be recorded on an information recording medium such as an optical disc with an appropriate recording power. It is an object to provide an information recording device and method, an information recording and reproducing device and method, and a computer program that causes a computer to function as such an information recording device.
- an information recording apparatus records information on a recording medium by irradiating the information recording medium with a laser beam having a recording power corresponding to a repair setting value.
- a correction amount of the reference set value is obtained based on the correlation information, and a correction based on the correction amount is obtained.
- an information recording method includes a recording step of irradiating a laser beam of a recording pattern according to a set value onto an information recording medium to record the recording information on the information recording medium.
- the recording step by reproducing the test recording information recorded while changing the set value, correlation information indicating a correlation between the set value and the reproduction quality is created, and a desired reproduction quality (target A calculation step of obtaining a reference set value for obtaining (reproduction quality), and a measurement step of measuring the reproduction quality by reproducing recorded information recorded using the reference set value in the recording step.
- a correction amount of the reference set value is obtained based on the correlation information, and based on the correction amount.
- Settings After positive to have a a correcting step for correcting the reference set value so that the new reference set values.
- an information recording / reproducing apparatus of the present invention includes the information recording apparatus of the present invention, and reproducing means for reproducing the recorded information from the information recording medium.
- an information recording / reproducing method of the present invention includes the information recording method of the present invention, and a reproducing step of reproducing the recorded information from the information recording medium.
- a first computer program of the present invention is a recording control computer program for controlling a computer provided in an information recording apparatus of the present invention. It functions as at least a part of the recording unit, the calculating unit, the measuring unit, and the correcting unit.
- a second computer program of the present invention is a computer program for controlling recording and reproduction for controlling a computer program provided in the information recording and reproducing apparatus of the present invention. Function as at least a part of the information recording device and the reproducing unit.
- FIG. 1 shows a basic structure of an optical disc as an example of an information recording medium used in an embodiment according to the information recording apparatus of the present invention, and an upper part is a schematic plan view of an optical disc having a plurality of areas; this
- FIG. 2 is a block diagram conceptually showing a basic configuration of an embodiment according to the information recording apparatus of the present invention.
- FIG. 3 is a flowchart showing a flow of an operation before data recording in the information recording apparatus according to the embodiment.
- FIG. 4 is a flowchart showing a flow of an operation for creating a correlation equation in the information recording apparatus according to the embodiment.
- FIG. 5 is a graph showing a correlation formula created in the information recording apparatus according to the present embodiment, and a table showing specific numerical values of recording power and asymmetry which are the basis for the creation.
- FIG. 6 is a flowchart showing a flow of a recording laser power correcting operation in the information recording apparatus according to the embodiment.
- FIG. 7 is a graph conceptually showing a state on a correlation equation when the recording laser power is corrected in the information recording apparatus according to the present embodiment.
- FIG. 8 is a flowchart showing a flow of an operation during data recording in the information recording apparatus according to the embodiment.
- FIG. 9 is a flowchart showing a flow of a soft landing operation of the information recording apparatus according to the embodiment.
- FIG. 10 is an explanatory view conceptually showing a state of asymmetry during a soft landing operation.
- FIG. 11 is a flowchart showing a flow of an operation of repeating a plurality of corrections in the information recording apparatus according to the embodiment.
- An embodiment according to the information recording apparatus of the present invention includes: a recording unit that irradiates a laser beam having a recording power according to a set value onto an information recording medium to record recording information on the information recording medium; By reproducing the test recording information recorded while changing the set value, correlation information indicating a correlation between the set value and the reproduction quality is created, and a desired reproduction quality (target reproduction quality) is created.
- various recording information including, for example, content such as video information and music information or data information for a computer is recorded by the operation of the recording means. It is possible.
- the value of the recording power that is, the set value
- the reference set value obtained by the calculating means is used. It is.
- the calculating means reproduces the test recording information (for example, an OPC pattern described later) recorded while changing the set value (that is, changing the recording power appropriately), and the desired reproduction quality is obtained.
- the target reproduction quality as the desired reproduction quality may be, for example, a reproduction quality that minimizes an asymmetry value, or a minimum reproduction value such as a jitter value or a reproduction error rate, as described later.
- the reproduction quality may be as follows.
- the calculating unit when calculating the reference setting value of the recording power, sets the recording power and the recording information recorded at the recording power corresponding to the setting value (for example, trial recording). Also, correlation information indicating the correlation between the information and the reproduction quality is obtained.
- This correlation information may be, for example, the reproduction quality indicated as a function of the set value, or may be indicated by a corresponding table (for example, a table indicating specific numerical values), or other various types. It may be shown by a Dallas table, a function, or the like.
- the measuring means is configured to be able to measure the reproduction quality of the recorded information recorded by the recording means.
- the correction amount of the reference set value is obtained by the operation of the correcting means. That is, the correction amount indicating the difference between the set value of the recording power for obtaining the target reproduction quality and the reference set value obtained by the calculating means is obtained. If the recording power is corrected according to the correction amount obtained by the correction means, the recording means can record the recording information with a more suitable recording power. Then, the correction means may control the recording means so as to correct the recording power according to the correction amount. Alternatively, the recording means may emit the laser beam with the new reference set value while correcting the recording power according to the correction amount obtained by the correction means!
- the reference set value obtained by the calculation means is corrected so that the set value reflecting the correction amount obtained by the correction means becomes a new reference set value.
- the recording power of the laser beam is also corrected.
- the subsequent operations are performed using the new reference setting value (that is, the reference setting value corrected by the correction unit). That is, it is preferable that the correction amount obtained by the correction means thereafter is the difference between the new reference setting value once obtained and the setting value for obtaining the target reproduction quality.
- the correction means is based on the reference set value obtained by the calculation means and the target reproduction quality. A correction amount that is a difference from a set value that can be obtained may be obtained.
- the embodiment of the information recording apparatus of the present invention it is possible to obtain a set value at a recording power capable of achieving a desired target reproduction quality by effectively using the correlation information. It becomes. Therefore, recording information can be recorded with an appropriate recording power. As a result, when reproducing the recording information, the occurrence of a reproduction error can be suppressed, and the reproduction quality can be further improved. It becomes possible.
- the correction means corrects the reference set value stepwise by a predetermined correction amount.
- the recording power is set so as to gradually approach the corrected setting value without rapidly or immediately switching the recording power so that the corrected setting value suddenly changes from the reference setting value to the corrected setting value.
- the correction of the recording power (that is, the degree of change) can be made gently. Therefore, it is possible to prevent a situation in which the recording state (for example, asymmetry value) of the recording information suddenly largely changes due to a sudden change in the recording power. As a result, it is possible to prevent various disadvantages (for example, a reading error at the time of reproduction as described later) that can occur due to a sudden change in recording power. Accordingly, there is a great advantage that the information reproduction apparatus can realize the appropriate reproduction of the recorded information, for example. It is preferable that the size of the predetermined correction amount that can be adjusted stepwise can be appropriately changed according to the gradual change of the recording power due to the correction. However, a configuration may be adopted in which a predetermined size is determined in advance.
- the magnitude of the predetermined correction amount is variable.
- the degree of change in recording power can be set as appropriate. For example, if the predetermined correction amount is set relatively small, the change in the recording power becomes relatively gradual. On the other hand, if the predetermined correction amount is set relatively large, the change in the recording power becomes relatively steep.
- the correction unit further includes a first determination unit that determines whether the reference set value is corrected step by step.
- the recording power can be corrected in a stepwise manner, or the recording power can be corrected immediately, for example, according to the determination by the first determination unit.
- the recording power can be corrected in a stepwise manner, or the recording power can be corrected immediately, for example, according to the determination by the first determination unit.
- the recording information recorded at the recording power capable of achieving the target reproduction quality increases, and a more suitable recording operation is performed. Can be realized.
- the correction unit does not correct the reference set value when a correction amount of the reference set value is equal to or less than a predetermined amount.
- the reference set value maintains the reference set value before the correction amount is obtained (in other words, , Do not modify the reference settings). If the correction amount is equal to or more than the predetermined amount, the corrected set value is corrected as a new reference set value. For this reason, by appropriately setting the predetermined amount, it is possible to determine that the correction amount by the correction unit is appropriately reduced and converge to a more appropriate reference set value. Therefore, it is not necessary to modify the reference set value more than necessary, and the processing performance of the recording operation can be improved.
- the operation of determining whether or not to make a correction based on the magnitude of the correction amount will be described in detail in an embodiment described later.
- the correction unit includes the recording unit.
- the recording unit corrects the reference set value every time a predetermined amount of recording information is recorded or every predetermined time.
- the information recording medium is located at the shifted recording position or the recording operation is continued! /.
- Record information can be recorded.
- the numerical values relating to the “predetermined amount of recording information” and the “predetermined time” may be, for example, predetermined values or may be appropriately changed during recording of the recording information.
- the information recording apparatus may be configured to be changeable by a user, or may be configured to be changeable automatically by operation of a CPU or the like.
- the correction means is configured to calculate the correction amount every time the position at which the recording means records the recording information changes by a predetermined amount on the information recording medium. Is also good.
- the recording information With this configuration, it is possible to appropriately record the recording information with the recording power according to the optimum value even at the position of! / And the deviation on the information recording medium.
- the correction amount can be obtained as needed as the recording position moves between the inner circumference, the middle circumference, and the outer circumference. Therefore, for example, the recording information can be recorded with a more suitable recording power in response to a change in the reference set value due to sensitivity unevenness or the like.
- the reproduction quality is a reproduction quality including at least one of an asymmetry value, a jitter value, and a reproduction error rate.
- the target playback quality may be a playback quality that minimizes the asymmetry value, a playback quality that minimizes the jitter value, or a playback error rate that is minimized.
- the reproduction quality may be as follows.
- the playback quality may be appropriately combined to determine the correction amount, or the correction amount may be determined by preferentially determining one of the playback qualities. May be.
- the measuring unit is configured to perform measurement directly.
- the reproduction quality of the recorded information previously recorded by the recording means is measured.
- the term "immediately before” in the present invention indicates a word just before, and has a broad meaning including a state separated by a period that can be regarded as immediately before. Therefore, the recording information can be recorded with the recording power based on the more preferable reference setting value.
- the recording is performed such that at least one of the correlation information and the reference set value information obtained by the calculation means is recorded on the information recording medium.
- the apparatus further includes control means for controlling the means.
- it may be configured to include a storage unit that stores at least one of the information of the reference set value obtained by the calculation unit and the correlation information.
- the correlation information is obtained when the information recording medium is loaded, the semiconductor memory such as a RAM and other recording media can be used thereafter.
- the optimum value can be obtained based on the correlation information stored in the storage means including the information.
- An embodiment according to the information recording method of the present invention includes: a recording step of irradiating a laser beam having a recording power according to a set value onto the information recording medium to record recording information on the information recording medium; By reproducing the test recording information recorded while changing the set value, correlation information indicating the correlation between the set value and the reproduction quality is created, and the target reproduction quality that is a desired reproduction quality can be obtained.
- a calculating step of obtaining a reference set value and in the recording step, recording information recorded using the reference set value.
- a reproduction step of measuring the reproduction quality, and when the reproduction quality measured in the measurement step is different from the target reproduction quality, the correction amount of the reference set value is determined based on the correlation information. And setting the corrected value as a new reference set value.
- the embodiment of the information recording method of the present invention similarly to the above-described embodiment of the information recording apparatus of the present invention, it is possible to obtain the reference set value and the correlation information in the calculation step. . Then, in the measurement step, the reproduction quality of the recorded information recorded can be measured. Then, in the correction step, the correction amount can be obtained using the correlation information. As a result, in the recording process, the recording information can be recorded with a more suitable recording node (that is, according to the corrected reference setting value). Therefore, it is possible to enjoy the various benefits of the above-described embodiment according to the information recording apparatus of the present invention.
- the embodiment of the information recording method according to the present invention can also adopt various aspects.
- the embodiment of the information recording / reproducing apparatus of the present invention is different from the embodiment of the information recording apparatus of the present invention described above (including its various aspects) in that the recorded information is reproduced from the information recording medium.
- Reproduction means for producing the recorded information.
- the information recording / reproducing apparatus of the present invention it is possible to receive the various benefits of the above-described embodiment of the information recording apparatus of the present invention, and to provide, for example, an optical pickup or an RF detector. It is possible to reproduce the information by using the reproducing means including the above.
- the embodiment of the information recording and reproducing apparatus according to the present invention can also adopt various aspects.
- the embodiment according to the information recording / reproducing method according to the present invention is the same as the embodiment according to the information recording method according to the present invention (specifically, each step) and the information recorded from the information recording medium. And a reproducing step of reproducing information.
- the above-described information recording / reproducing method of the present invention is In addition to enjoying the various benefits of the embodiment relating to the recording method, it is possible to reproduce information in a reproduction step by operation of, for example, an optical pickup or an RF detector.
- the embodiment of the information recording and reproducing method according to the present invention can also adopt various aspects.
- the first embodiment of the computer program according to the present invention causes a computer to function as the above-described embodiment of the information recording apparatus (including its various forms). More specifically, a computer is caused to function as at least a part of the recording unit, the calculating unit, the measuring unit, and the correcting unit in the embodiment of the information recording device described above.
- the computer program is read into a computer from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program, and is executed.
- a recording medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program.
- the computer program is executed after being downloaded to a computer via communication means, the above-described embodiment of the information recording apparatus of the present invention can be realized relatively easily.
- the first embodiment of the computer program of the present invention can also adopt various aspects.
- a second embodiment of the computer program according to the present invention is a computer program for recording / reproducing control for controlling a computer program provided in the above-described embodiment of the information recording / reproducing apparatus (including its various forms).
- Computer program causing the computer to function as at least a part of the information recording device and the reproducing unit.
- a recording medium such as a ROM, a CD-ROM, a DVD-ROM, and a hard disk for storing the computer program
- the second embodiment of the computer program of the present invention can also adopt various aspects.
- the first embodiment of the computer program product in the computer readable medium clearly embodies a computer-executable program instruction, and executes the computer by using the information recording apparatus described above. (However, including its various forms). More specifically, the computer is caused to function as at least one of the recording unit, the calculation unit, the measurement unit, and the correction unit in the information recording device described above.
- the second embodiment according to the computer program product in the computer readable medium is executed by a computer provided in the above-described information recording / reproducing apparatus (including its various forms) in order to solve the above problem.
- the possible program instructions are tangibly embodied, and the computer functions as the above-described information recording / reproducing apparatus (including its various forms). More specifically, the computer is caused to function as at least a part of the information recording device and the reproducing unit.
- the computer program product is stored in a storage medium such as a ROM, a CD-ROM, a DVD-ROM, or a hard disk that stores the computer program product. If the product can be read into a computer, or the computer program product, for example, a transmission wave, can be downloaded to the computer via communication means, the above-described information recording apparatus or information recording / reproducing apparatus of the present invention can be relatively easily implemented. It becomes feasible. More specifically, the computer program product may be composed of computer-readable codes (or computer-readable instructions) that function as the information recording device or the information recording / reproducing device of the present invention. [0061]
- the information recording apparatus includes the recording unit, the calculating unit, the measuring unit, and the correcting unit. Therefore, recording information can be recorded with an appropriate recording power, and the occurrence of recording errors can be suppressed.
- FIG. 1 is a schematic plan view showing the structure of an optical disc having a plurality of areas on the upper side, and the area structure in the radial direction is shown on the lower side in association with a conceptual diagram.
- the optical disc 100 can be recorded by various recording methods such as a magneto-optical method and a phase change method, which can record (write) only a plurality of times or once.
- a lead-in area 104, a data recording area 106, and a lead-out area 108 are provided on the recording surface on the disk body having a diameter of about 12 cm with the center hole 102 as the center and the inner circumferential force toward the outer circumference.
- groove tracks and land tracks are alternately provided spirally or concentrically around the center hole 102, and the groove tracks may be fogged. Prepits may be formed on one or both of the tracks.
- the present invention is not particularly limited to an optical disk having such three areas.
- the file structure described below can be constructed.
- the lead-in area 104 and the lead-out 108 may have a further subdivided configuration.
- FIG. 2 is a block diagram conceptually showing the basic configuration of the information recording apparatus according to the present embodiment.
- the information recording apparatus 1 includes a spindle motor 301, an optical pickup 310, a head amplifier 311, an RF detector 312, a servo circuit 315, an LD driver 320, 325, LPP Data Detector 326, Envelope Detector 330, OPC Pattern Generator 340, Timing Generator 345, Data Collector 350, Nofa 360, DVD Modulator 370, Data ECC Generator 380, Nofa 385, Interface 390, a CPU 400 and a memory 410.
- the spindle motor 301 is configured to rotate the optical disc 100 at a predetermined speed while receiving spindle servo by the servo circuit 315 or the like.
- the optical pickup 310 performs recording or reproduction on the optical disc 100, and includes a semiconductor laser device, various lenses, an actuator, and the like. More specifically, the optical pickup 310 irradiates the optical disc 100 with a light beam, such as a laser beam, at a first power as read light at the time of reproduction, and modulates it at a second power as write light at the time of recording. Irradiate while irradiating.
- the optical pickup 310 is configured to be movable in a radial direction or the like of the optical disc 100 by a not-shown actuator, slider, or the like driven by the servo circuit 315.
- the head amplifier 311 amplifies the output signal of the optical pickup 310 (that is, the reflected light of the light beam B) and outputs the amplified signal. Specifically, an RF signal as a read signal is output to the RF detector 312 and the envelope detector 330, and a push-pull signal is output to the cobble detector 325 and the LPP data detector 326.
- the RF detector 312 is configured to detect the RF signal and perform demodulation or the like, so that the reproduced data can be output to the outside via the buffer 385 and the interface 390. Then, predetermined content is reproduced and output on an external output device (for example, a display device such as a liquid crystal display or a plasma display, or a speaker) connected to the interface 390.
- an external output device for example, a display device such as a liquid crystal display or a plasma display, or a speaker
- the servo circuit 315 controls the objective lens of the optical pickup 310 based on a tracking error signal, a focus error signal, and the like obtained by processing the light reception result of the optical pickup 310. Then, various servo processes such as tracking control and focus control are executed. Further, the spindle motor 301 is configured to perform servo control based on a wobble signal that can also obtain the vibration of the grooved groove on the optical disc 100.
- the LD driver 320 drives a semiconductor laser provided in the optical pickup 310 so that an optimum recording laser power can be determined by OPC pattern recording and reproduction processing described later during OPC processing described later. . Thereafter, at the time of data recording, the LD driver 320 drives the semiconductor laser of the optical pickup 310 with the optimum recording laser power determined by the OPC process. During this data recording, the optimum recording laser power is modulated according to the recording data.
- recording means includes the above-described spindle motor 301, optical pickup 310, servo circuit 315, LD driver 320, and the like.
- the cobble detector 325 is a push-pull signal indicating a cobble signal based on an output signal corresponding to the amount of light received from a head amplifier 311 serving as a detector for receiving a reflected light beam provided in the optical pickup 310. Is detected and output to the timing generator 345.
- the LPP data detector 326 generates a push-pull signal indicating an LPP signal based on an output signal corresponding to the amount of light received from a head amplifier 311 serving as a detector for receiving a reflected light beam provided in the optical pickup 310. , And for example, as described later, the preformat address information can be detected. The pre-format address information can be output to the timing generator 345.
- the envelope detector 330 determines the optimum recording laser power under the control of the CPU 400 during the reproduction of the OPC pattern in the OPC process, and determines the peak of the envelope detection of the RF signal as the output signal from the head amplifier 311. It is configured to detect the value and the bottom value.
- the envelope detector 330 may be configured to include an AZD (Analog / Digital) converter, for example.
- the OPC pattern generator 340 indicates the OPC pattern based on the timing signal from the timing generator 345 when recording the OPC pattern in the OPC processing before the recording operation. Output to the LD driver 320! RU
- the timing generator 345 When recording the OPC pattern in the OPC process, the timing generator 345, based on the preformat address information input from the LPP data detector 326, stores absolute position information based on the management unit of the preformat address information. Is detected. At the same time, based on the period of the push-pull signal indicating the wobble signal, a slot unit smaller than the management unit of the preformat address information (for example, a slot corresponding to a natural number times one cycle of the wobble signal). ) Is detected as relative position information based on (unit). Therefore, the timing generator 345 can specify the recording start position regardless of whether the recording start position in the OPC process also starts the boundary force of the management unit of the preformat address information.
- a timing signal for writing an OPC pattern is generated and output based on the period of the push-pull signal indicating the wobble signal output from the wobble detector 325.
- the timing generator 345 can specify the reproduction start position at the time of reproduction of the OPC pattern in the OPC processing in the same manner as at the time of recording, and thereafter, the reproduction signal output from the signal detector 325 Based on the period of the push-pull signal that indicates! /, A timing signal for sampling the reproduced OPC pattern is generated and output.
- the data collector 350 is mainly a general memory. For example, it is composed of an external RAM or the like.
- the envelope detected by the envelope detector 330 is stored in the data collector 350, and based on this, the detection of the optimum recording laser power in the CPU 400, that is, the OPC process is executed.
- the notifier 360 stores recording data modulated by the DVD modulator 370 and can output the recording data to the LD driver 320.
- the DVD modulator 370 is configured to perform DVD modulation on recorded data and output the modulated data to the buffer 360.
- EFM Eight to Fourteen Modulation
- modulation may be performed as DVD modulation!
- Data ECC generator 380 adds a code for error correction to the recording data input from interface 390. Specifically, an ECC code is added for each predetermined block unit (for example, ECC block unit), and output to the DVD modulator 370. [0085] The buffer 385 stores the reproduction data output from the RF detector 312,
- the interface 390 receives an input of recording data or the like from an external input device, and
- the reproduction data output from the RF detector 312 can be output to an external output device such as a speaker or a display.
- the CPU 400 instructs each means such as the LD driver 320 and the servo circuit 315, that is, outputs a system command in order to detect the optimum recording laser power. Perform control.
- software for operating the CPU 400 is stored in an internal or external memory.
- the memory 410 includes a semiconductor memory such as a RAM or a flash memory, for example, and is configured to be able to record a correlation equation and an optimum recording power Po as described later.
- the information recording apparatus also serves as an embodiment of the information recording / reproducing apparatus. That is, recorded information can be reproduced via the head amplifier 311 and the RF detector 312, and this embodiment includes the function of the information reproducing apparatus or the function of the information recording and reproducing apparatus.
- FIG. 3 is a flowchart showing a flow of an operation of the information recording apparatus 1 according to the present embodiment before data recording
- FIG. 4 shows a flow of an operation of creating a correlation equation between recording laser power and asymmetry.
- FIG. 5 is a graph showing the created correlation equation, and a table showing the respective numerical values of the recording power and asymmetry from which the correlation was created
- FIG. 6 is a flowchart showing the flow of the operation of correcting the recording laser power.
- FIG. 7 is a graph conceptually showing a calculation operation on the correlation equation at the time of the correction operation.
- the terms “reference recording laser power” and “optimal recording laser power” are used, but “reference recording laser power” is mainly used as the recording laser power when data is recorded. It is a guide and is mainly required by OPC treatment. The once determined “optimal recording laser power” is treated as “reference recording laser power” in the subsequent data recording as described later.
- the “optimum recording laser power” indicates an optimum value of the recording laser power at the time of recording, which is appropriately calculated during data recording.
- Step S101 the optical disc 100 is loaded (Step S101). Then, under the control of the CPU 400, a seek operation is performed by the optical pickup 310, and various management data necessary for the recording process on the optical disc 100 is obtained. Under the control of the CPU 400, data is recorded on the optical disc 100 via the interface 390 under the control of the CPU 400, for example, according to a command from an external input device or the like.
- step S102 it is determined whether or not a correlation formula indicating the relationship between the recording laser power and the asymmetry has already been created under the control of the CPU 400 (step S102).
- a correlation formula indicating the relationship between the recording laser power and the asymmetry has already been created under the control of the CPU 400.
- step S 102 if a correlation equation has not been created (step S 102: No), a correlation equation is created (step S 103).
- step S 103 the operation of creating the correlation equation will be described in more detail with reference to FIGS.
- the OPC process is executed (step S201).
- the OPC processing will be described more specifically.
- the optical pickup 310 is moved to the power calibration area provided in the lead-in area 104, and the OPC pattern generator 340 and the LD
- the recording laser power is sequentially switched stepwise (for example, in 16 steps different from each other), and the OPC pattern as a specific example of the “test recording information” in the present invention is subjected to power calibration. Recorded in the area.
- an OPC pattern for example, recording in which short pits equivalent to 3T pulses and long pits equivalent to 11T pulses are alternately formed together with non-recording sections of the same length A pattern is one example.
- the LD driver 320 drives the semiconductor laser in the optical pickup 310 so that the recording laser power is switched stepwise in accordance with the OPC pattern output from the OPC pattern generator 340.
- the OPC pattern recorded in the power calibration area is reproduced under the control of the CPU 400. Then, the peak value and the bottom value of the envelope detection of the RF signal are sampled from the RF signal input to the envelope detector 330 and output to the data collector 350. Then, under the control of the CPU 400, these peak values and bottom values are stored in the data collector 350. Thereafter, such OPC pattern reproduction is performed in one OPC process, for example, according to the number of recorded OPC patterns, and the asymmetry is obtained from the peak value and the bottom value for each reproduction.
- a specific example of the "calculating means" in the present invention includes the CPU 400, the OPC pattern generator 340, and the like described above.
- step S202 a correlation expression as one specific example of "correlation information" in the present invention is created. That is, in step S202, a function indicating the relationship between the recording laser power switched step by step and the asymmetry of the OPC pattern recorded at the recording laser power is created.
- the correlation equation is created using a quadratic curve.
- the present invention is not limited to this.
- the recording laser power that minimizes the asymmetry (that is, becomes 0) is obtained as the reference recording laser power Po (step S203).
- a correlation equation as shown in FIG. 5 (b) is obtained, a recording laser power value of 13.3 mW at which the asymmetry becomes 0 is obtained as the reference recording laser power Po.
- asymmetry enables appropriate recording operation and the like in the range of 0.05 to 0.15, so that the value of the recording laser must be such that the asymmetry is always 0.
- the value may be, for example, 0.10 or 0.03.
- the reference recording laser power Po that is, a value of 13.3 mW is also recorded in the memory 410 at the same time.
- step S106 data recording is performed with reference recording laser power Po (step S106).
- the optical pickup 310 is moved to a recording area (for example, the data recording area 106 shown in FIG. 2), and the recording laser power (that is, the reference recording power) previously obtained is controlled by the LD driver 320 and the like.
- the recording laser power that is, the reference recording power
- the recording data is recorded in the recording area.
- recording pits corresponding to the recording data are formed on the track.
- step S 102 if it is determined that a correlation equation has been created (step S 102: Yes), under the control of CPU 400, correction of the reference recording laser power is performed using the correlation equation. Is determined (step S104). The determination here may be made even if it is determined that the optimum recording laser power is to be corrected, for example, when the time during which the recording operation is continued or the position where the data is recorded on the optical disc 100 is relatively largely changed. Good
- step S104 Since the operation here is before data recording, it is considered that there is no case where data has already been recorded. However, for example, when the recording of data without unloading the optical disc 100 is temporarily stopped, the determination in step S104 and the subsequent correction of the recording laser power become effective.
- Step S106 a data recording operation is performed (Step S106).
- the data is recorded at the recording laser power (ie, the reference recording laser power Po) such that the asymmetry of the recorded correlation equation becomes zero. That is, for example, if a correlation equation as shown in FIG. 5B is recorded, data recording is performed with a recording laser power of 13.3 mW.
- the reference recording laser power Po is recorded in the memory 410, data recording may be performed with the recording laser power Po.
- Step S104 If it is determined that the reference recording laser power Po is to be corrected (Step S104: Yes), an operation of correcting the reference recording laser power Po is performed (Step S105).
- the recording section is reproduced last time, and the asymmetry Asy is obtained by the operation of the envelope detector 330, which is one example of the “measuring means” in the present invention (step S301).
- the envelope detector 330 which is one example of the “measuring means” in the present invention.
- the data recorded immediately before the correction operation of the reference recording laser power Po or at a time that can be regarded as almost immediately before the reproduction is reproduced, and the asymmetry Asy is obtained from the reproduced signal (that is, the RF signal).
- the reproduced signal that is, the RF signal
- the operation of the CPU 400 which is a specific example of “correction means” in the present invention, uses a correlation equation to record the asymmetry Asy obtained at step S301 and the data up to that point in step S301. From the used reference recording laser power Po, the optimum recording laser power Pol after the correction is obtained (step S302).
- step S301 the asymmetry Asy obtained in step S301 is 0.05, and the reference recording laser power Po when the data was recorded immediately before is 13.3 mW.
- the recording laser power is also a low value. This is because the absolute value of the optimum recording laser power for data recording is changed due to a change in characteristics due to a difference in the recording position of the optical disc 100, for example.
- the difference between the recording laser powers at points A and B is 0.6 mW based on the correlation equation. That is, the difference between the recording laser powers at which the asymmetry becomes “0” and “0.05” is 0.6 mW.
- the corrected optimum recording laser power Pol obtained in step S302 is updated as a new reference recording laser power Po, and recorded in the memory 410 (step S303). Thereafter, data is recorded with the new reference recording laser power Po (ie, the optimum recording laser power Pol) determined here.
- the data recording operation will be described later in detail (see FIG. 8).
- the value of the reference recording laser power obtained by the OPC process can be further modified. That is, a more suitable optimum recording laser power can be obtained by using the asymmetry of the actually recorded data and the correlation equation obtained by the OPC processing.
- various data that is, for example, a correlation formula
- the asymmetry value is used as a specific example of “reproduction quality” in the present invention.
- the present invention is not limited to this. For example, based on a jitter value, a reproduction error rate, etc. It may be configured to correct the recording laser power! /.
- FIG. 8 is a flowchart showing a flow of an operation during data recording.
- a data recording operation is performed (step S401). Thereafter, it is determined whether or not a predetermined amount of data has been recorded under the control of the CPU 400 (step S402).
- the predetermined amount serving as a criterion here may be, for example, one ECC block or a number of ECC blocks having a larger size! You may. Regardless of the size, it is preferable that the size is large enough to measure the asymmetry by reproducing the data recorded in the predetermined amount. Further, these numerical values may be predetermined in the information recording device 1 or may be appropriately changed by a user of the information recording device 1, the CPU 400, or the like. May be. Also, it may be configured to determine whether or not data has been recorded for a predetermined period of time based on the amount of recorded data.
- step S402 determines whether or not the predetermined amount of data has been recorded again.
- step S402 determines whether to end the recording operation. If it is determined that a predetermined amount of data has been recorded (step S402: Yes), the recording operation is suspended (step S403), and the correction of the reference recording laser power Po is performed as described above. Perform (step S404). Then, under the control of the CPU 400, it is determined whether to end the recording operation (step S405).
- Step S405: Yes if it is determined that the recording operation is to be terminated (Step S405: Yes), the recording operation is terminated, and the optical disc 100 on which desired data is recorded is taken out as needed. On the other hand, if it is determined that the recording operation is not to be ended (step S405: No), the process returns to step S401 again to continue data recording.
- the reference recording laser power can be corrected every time a predetermined amount of data is recorded. Therefore, if the reference recording laser power is corrected at any position on the recording surface of the optical disc 100 and the position is corrected at that position, the optimum position at the position of the deviation is more suitable. Recording data with recording laser power You can do it.
- FIG. 9 is a flow chart showing the flow of the soft landing operation
- FIG. 10 is an explanatory diagram conceptually showing the asymmetry at the time of the soft landing operation. Note that the same operations as those described above are denoted by the same step numbers, and detailed description thereof is omitted.
- the soft landing operation refers to a mode in which the value of the recording laser power is gradually changed when the value is changed from Po to Pol at the time of correcting the reference recording laser power described above. .
- the operation of correcting the recording laser power described with reference to FIG. 6 is different from the operation described above. Therefore, the differences are described here in detail.
- the asymmetry Asy is obtained by reproducing the data recorded immediately before (step S301), and the corrected optimum recording laser power Pol is obtained (step S302). Then, under the control of the CPU 400, a difference AAsy between the asymmetry Asy obtained in step S301 and the target asymmetry is obtained (step S501). For example, if the asymmetry Asy obtained in step S301 is “0.05,” and the target asymmetry force S is “0”, the difference ⁇ Asy becomes “0.05”.
- step S301 it is determined whether or not the absolute value I AAsy
- step S301 it is determined whether the asymmetry Asy and the target asymmetry obtained in step S301 have forces that have significantly different values.
- the numerical value of "0.01" as a criterion is not limited to this value. If the soft landing operation is to be performed more strictly, a smaller value should be set. On the other hand, the soft landing operation should not be performed much. If so, it is preferable to set a larger value.
- These settings may be configured to be performed by the user of the information recording device 1 using, for example, a remote controller or operation buttons, or may be configured to be automatically performed by the CPU 400.
- step S502 If it is determined that the value is not larger than 0.01 (step S502: No), the software Update the optimum recording laser power Pol obtained in step S302 without performing the landing operation as the new reference recording laser power Po (step S303), and record the data. If the asymmetry Asy and the target asymmetry do not have significantly different values as described above, for example, an auto slicer described later can follow a change in asymmetry without recording data by a soft landing operation. Therefore, for example, an information reproducing apparatus such as a player can reproduce data appropriately.
- step S502 if it is determined that the value is larger than 0.01 (step S502: Yes), data is recorded in a recording area corresponding to one sector (step S503). At this time, the recording laser power for recording data is the reference recording laser power Po before correction.
- the recording laser power obtained by adding 0.1 lmW to Po is set as a new reference recording laser power Po (step S504). Thereafter, under the control of the CPU 400, it is determined whether or not the Po (ie, the Po increased by 0.1 lmW) force is greater than the Pol (Step S505).
- the Pol is updated as a new reference recording laser power Po (step S303).
- the recording area corresponding to one sector for recording data is preferably a recording area adjacent to the recording area recorded last time.
- step S504 it is necessary to sequentially switch data with the recording laser power obtained by subtracting 0.1 lmW from Po as the new reference recording laser power Po. Then, in the determination in step S505, it is necessary to determine whether Po is smaller than Pol.
- the numerical value “0. lmW” to be added or subtracted as appropriate in step S504 may be appropriately changed.
- the numerical value of "1 sector" which is the size of the data recording area, may be changed as appropriate.
- the recording laser power may be changed from the reference recording laser power Po to the optimum recording laser power Po1 in approximately one second. Such a change may be made automatically, for example, by the operation of the CPU 400, or may be made based on an instruction from the user, for example, using a remote controller or operation buttons. ! / ,.
- the 3T amplitude pattern before and after the correction of the recording laser power that is, the data Of the reproduction signal (one of the reproduction signals when the data is reproduced) becomes gradual. That is, the asymmetry changes relatively slowly across the linking position, which is one boundary of data recording, without abrupt changes in asymmetry. Therefore, even if, for example, the response of the auto slicer of the information reproducing apparatus is poor, or even if the data structure employs, for example, a lossless link, the auto slicer can follow a change in asymmetry, and can be appropriately performed. Data can be reproduced.
- the auto slicer mainly traces data (specifically, recording pits and the like) recorded on the optical disc 100, and diminishes a signal reproduced from the recording pit.
- the recording apparatus By performing a soft landing operation, such inconveniences can be effectively prevented, and data can be appropriately reproduced so that the information reproducing apparatus can appropriately reproduce the data. It has the great advantage that it can be recorded. And the preceding Compared with the recording apparatus described in the technical literature, the recording apparatus has a great advantage that a reproduction error at the time of reproducing recorded data can be effectively prevented.
- FIG. 11 is a flowchart showing the flow of the operation of repeating the correction a plurality of times. Note that the same operations as those described above are denoted by the same step numbers, and detailed description thereof is omitted.
- step S401 data is recorded on the optical disc 100 (step S401), and it is determined whether a predetermined amount of data has been recorded (step S402). If it is determined that a predetermined amount of data has not been recorded (step S402: No), the data recording is continued again. On the other hand, if it is determined that a predetermined amount of data has been recorded (step S401: Yes), the recording is interrupted (step S403), and the recording laser power is corrected (step S404).
- step S601 it is determined whether or not the correction amount of the recording laser power is larger than a predetermined amount.
- step S601: No when it is determined that the correction amount is not large (step S601: No), the data recording operation is continued without correcting the recording laser power thereafter (steps S405 and S401). .
- the configuration may be such that, for example, when the recording position for recording data has changed significantly, the process returns to step S401 to correct the recording laser power.
- step S601: Yes if it is determined that the correction amount is large (step S601: Yes), the data recording is continued while the recording laser power is corrected. That is, the correction operation is performed again even after the recording laser No. has been corrected once.
- the "predetermined amount” is preferably determined in consideration of a measurement error when measuring asymmetry.
- the correction amount at which the asymmetry becomes “0.1” may be the predetermined amount.
- the power value converges to a value that becomes the optimum recording laser power of V and deviation.
- the power that matters here This is a comparison operation of the power. If the correction amount is smaller than the predetermined amount, it can be estimated that the value is approaching the optimum recording laser power. For this reason, the correction operation can be suppressed to a necessary limit without correcting the recording laser power more than necessary. On the other hand, if the correction amount is larger than the predetermined amount, it can be estimated that the value does not approach the optimum recording laser power. For this reason, by repeating the correction operation again, the power value is corrected so as to approach the optimum recording laser power.
- the above-described operation is preferably applied to a case where data is recorded in a recording area whose recording characteristics are substantially the same or included in a range within which the recording characteristics can be identified. Then, when the data recording position is greatly changed, it is preferable to return to step S401 on the upper side of FIG. 11 again and operate again to perform the correction operation.
- the optical disk 100 as an example of the information recording medium and the recorder relating to the optical disk 100 as an example of the information recording apparatus.
- the present invention is not limited to the optical disk and its recorder.
- the present invention is also applicable to various other information recording media compatible with high-density recording or high transfer rate and its recorder.
- the present invention is not limited to the embodiments described above, and may be modified as appropriate without departing from the spirit or spirit of the readable invention.
- An information recording medium, an information recording device and method, and a computer program for recording control are also included in the technical scope of the present invention.
- the information recording medium, the information recording apparatus and method, the information recording and reproducing apparatus and method, and the computer program according to the present invention can be used, for example, to store various types of information for consumer or business use.
- the present invention can be used for a high-density optical disk capable of recording at a high density, and can also be used for a recorder or a player related to the optical disk. Further, for example, the present invention can also be used for an information recording medium, a recording or reproducing device, etc. which is mounted on various consumer or business computer devices or connectable to various computer devices.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005514429A JPWO2005034109A1 (ja) | 2003-10-03 | 2004-09-28 | 情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法並びにコンピュータプログラム |
US10/574,354 US7603027B2 (en) | 2003-10-03 | 2004-09-28 | Information recording medium, information recording device and method, information recording/reproducing device and method, and computer program |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-346064 | 2003-10-03 | ||
JP2003346064 | 2003-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005034109A1 true WO2005034109A1 (ja) | 2005-04-14 |
Family
ID=34419489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/014151 WO2005034109A1 (ja) | 2003-10-03 | 2004-09-28 | 情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法並びにコンピュータプログラム |
Country Status (3)
Country | Link |
---|---|
US (1) | US7603027B2 (ja) |
JP (1) | JPWO2005034109A1 (ja) |
WO (1) | WO2005034109A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080212427A1 (en) * | 2007-02-05 | 2008-09-04 | Taiyo Yuden Co., Ltd. | Recording condition adjusting method of optical disc recording/playing system, optical recording playing device and optical disc |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10283656A (ja) * | 1997-04-08 | 1998-10-23 | Sony Corp | レーザパワー調整方法及び記録再生装置 |
JP2000504467A (ja) * | 1996-12-06 | 2000-04-11 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 光記録媒体の書込み方法及び装置 |
JP2002208139A (ja) * | 2001-01-11 | 2002-07-26 | Ricoh Co Ltd | 情報記録方法、情報記録装置及び情報処理装置 |
JP2002373421A (ja) * | 2001-06-13 | 2002-12-26 | Teac Corp | 光ディスク装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003115110A (ja) * | 2001-08-01 | 2003-04-18 | Yamaha Corp | レーザパワー制御方法、光ディスク記録装置および光ディスク |
JP2003085760A (ja) * | 2001-09-12 | 2003-03-20 | Ricoh Co Ltd | 情報記録装置 |
JP3863497B2 (ja) * | 2002-12-04 | 2006-12-27 | 株式会社リコー | 光学的情報記録装置及び光学的情報処理装置 |
-
2004
- 2004-09-28 WO PCT/JP2004/014151 patent/WO2005034109A1/ja active Application Filing
- 2004-09-28 JP JP2005514429A patent/JPWO2005034109A1/ja active Pending
- 2004-09-28 US US10/574,354 patent/US7603027B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000504467A (ja) * | 1996-12-06 | 2000-04-11 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 光記録媒体の書込み方法及び装置 |
JPH10283656A (ja) * | 1997-04-08 | 1998-10-23 | Sony Corp | レーザパワー調整方法及び記録再生装置 |
JP2002208139A (ja) * | 2001-01-11 | 2002-07-26 | Ricoh Co Ltd | 情報記録方法、情報記録装置及び情報処理装置 |
JP2002373421A (ja) * | 2001-06-13 | 2002-12-26 | Teac Corp | 光ディスク装置 |
Also Published As
Publication number | Publication date |
---|---|
US7603027B2 (en) | 2009-10-13 |
US20080292284A1 (en) | 2008-11-27 |
JPWO2005034109A1 (ja) | 2006-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100602407B1 (ko) | 정보 기록 매체, 정보 기록 및 재생 방법과, 정보 기록 및재생 장치 | |
JPWO2005088613A1 (ja) | 情報記録装置及び方法、並びにコンピュータプログラム | |
US7366073B2 (en) | Information recording apparatus and method, and computer program product | |
US20050237884A1 (en) | Information recording apparatus and method, and computer program product | |
JP4422106B2 (ja) | 情報記録装置及び方法、コンピュータプログラム、並びに情報記録媒体 | |
JP4450237B2 (ja) | 情報記録装置及び方法、情報記録再生装置及び方法、並びにコンピュータプログラム | |
JP2687904B2 (ja) | 書換え型光記録再生装置 | |
JP2005100549A (ja) | 情報記録装置及び方法、情報記録再生装置及び方法、並びにコンピュータプログラム | |
JP2002025060A (ja) | 光記録再生装置およびテストライト方法 | |
WO2005031719A1 (ja) | 情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法、並びにコンピュータプログラム | |
JP2004253016A (ja) | レーザパワー調整方法、ディスクドライブ装置 | |
WO2005034109A1 (ja) | 情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法並びにコンピュータプログラム | |
WO2005034108A1 (ja) | 情報記録媒体、情報記録装置及び方法、情報記録再生装置及び方法、並びにコンピュータプログラム | |
JP4402049B2 (ja) | 情報記録装置及び方法、並びにコンピュータプログラム | |
JP2005228410A (ja) | 情報記録装置及び方法、並びにコンピュータプログラム | |
WO2005109409A1 (ja) | 情報記録装置及び方法、並びにコンピュータプログラム | |
JP4030862B2 (ja) | 多値記録のウォブル信号検出方法と光情報記録装置 | |
JP2005071470A (ja) | 情報記録再生装置 | |
JP3767424B2 (ja) | 光ディスク装置 | |
KR20040022702A (ko) | 디스크 구동기에 있어서 최적의 기록 파워 결정 장치 및방법 | |
JP4502144B2 (ja) | 情報記録装置及び方法、並びにコンピュータプログラム | |
WO2005034111A1 (ja) | 情報記録装置及び方法、並びにコンピュータプログラム | |
WO2006054638A1 (ja) | 情報記録媒体、情報記録装置及び方法、並びにコンピュータプログラム | |
JP2009015883A (ja) | 光ディスク装置及びその制御方法 | |
KR20060044019A (ko) | 광 기록 및 재생 장치의 틸트 보정 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005514429 Country of ref document: JP |
|
122 | Ep: pct application non-entry in european phase | ||
WWE | Wipo information: entry into national phase |
Ref document number: 10574354 Country of ref document: US |