WO2004112009A1 - 情報記録方法及び情報記録装置 - Google Patents
情報記録方法及び情報記録装置 Download PDFInfo
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- WO2004112009A1 WO2004112009A1 PCT/JP2004/002806 JP2004002806W WO2004112009A1 WO 2004112009 A1 WO2004112009 A1 WO 2004112009A1 JP 2004002806 W JP2004002806 W JP 2004002806W WO 2004112009 A1 WO2004112009 A1 WO 2004112009A1
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- WIPO (PCT)
- Prior art keywords
- recording
- information
- recording power
- recorded
- test
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Classifications
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- 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
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/006—Overwriting
- G11B7/0062—Overwriting strategies, e.g. recording pulse sequences with erasing level used for phase-change media
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
Definitions
- the present invention relates to an information recording method and information recording for various recording media such as CD-R, CD-RW, DVD-R, DVD-RW, DVD-RAM, and DVD + RW.
- various recording media such as CD-R, CD-RW, DVD-R, DVD-RW, DVD-RAM, and DVD + RW.
- recordable optical disk drive devices such as CD-R drive devices have been put into practical use, and research aimed at higher capacity and higher speed recording has been conducted.
- recordable optical disc media include write-once optical discs using dye-based media and rewritable discs using magneto-optical media and phase change media.
- a semiconductor laser is used as a light source, and this laser light pulse-modulated by recording information is irradiated onto a recording medium to form a recording mark.
- a predetermined area PC A: Power Calibration Area (trial writing area), test writing while changing the recording power, and after trial writing, optimal recording of the power recorded in the area with the best playback signal quality in that area
- OPC Optimum Power Control
- lame method power S are used as the best.
- the asymmetry is calculated according to the above, and the reproduction signal in which this asymmetry / 3 becomes a predetermined value (for example, 0) is improved.
- the second is an evaluation method using the modulation degree m of the reproduced signal (hereinafter referred to as “ ⁇ method” where appropriate).
- ⁇ method the maximum value I pk and minimum value I bt of the playback signal are detected.
- the modulation degree m is calculated.
- the change rate ⁇ of the modulation degree with respect to the recording power is calculated.
- the mark edge recording method in which the length of the mark suitable for high-density recording bears information is adopted.
- the mark mark recording method is used. Accurate control of the shape of the edge is required.
- a multi-pulse recording method in which a recording mark is formed by a pulse train divided into a plurality of recording pulses is widely used in order to uniformly adjust the mark shape even if the mark length is different. That is, a uniform long mark is formed by repeating the heating / cooling cycle to connect the marks. This method is also applied to dye-based write-once media.
- the recording power Pw may deviate from the ideal value of the recording mark length.
- Figure 5 illustrates this relationship. 1 is the characteristic of specific mark length (3 T), and 2 is the characteristic of other mark lengths.
- CD has a mark length from 3 T to 11 ⁇ (where ⁇ is the reference clock period of data), and the deviation ⁇ from the ideal value for the recording power of 3 ⁇ ⁇ , which is the minimum mark length, is Is different.
- the recording power of a specific mark length is recorded with a value different from the recording power of other mark lengths, and each mark length is recorded appropriately.
- the 3T mark is recorded with the recording power Pwex, and the other mark lengths are recorded with the recording power Pw.
- the relationship between the recording power and the deviation from the ideal value differs depending on the mark length, and the recording pulse of the recording medium and the recording device (that is, the recording pulse due to the variation of the semiconductor laser driving unit).
- the relationship between the optimum recording power Pwex (opt) for a specific mark length and the optimum recording power Pw (opt) for other mark lengths varies, so each recording power is set appropriately.
- the accuracy of the mark shape and mark position is impaired, resulting in a problem of data error. Disclosure of the invention
- the purpose of this statement is to optimize the recording performance of information recording methods and information recording devices that record the recording power of a specific mark length with a value different from the recording power of other mark lengths. It is an object to provide an information recording method and an information recording apparatus capable of obtaining a value and thereby performing accurate recording.
- information is recorded by irradiating a recording medium with light modulated based on recording information from a light source to form a recording mark.
- predetermined first test data is trial-written to the predetermined test writing area of the recording medium while changing the recording power to be irradiated in a stepwise manner, and from the reproduced signal of the recorded test writing data.
- a first trial writing step for calculating a first optimum recording power; and for a specific pattern of the recording information, the recording power is varied stepwise; for the other patterns, the recording power
- the second optimum recording power which is the optimum recording power of the specific pattern, is written from the reproduction signal of the recorded trial writing data.
- a second test writing step to calculate, and information is recorded based on the calculated first and second optimum recording powers.
- the predetermined first test data is a data string excluding the specific pattern from the recording information. Therefore, since the first test data is a data string excluding a specific pattern, an error in the reproduced signal detection value due to the fact that the recording data of the specific pattern is not optimized during the first test writing. Therefore, the first optimum recording power can be calculated with high accuracy.
- the predetermined second test data includes a first data string obtained by repeating a specific pattern of tin and the specific pattern of the recorded information.
- This is a data string obtained by repeating the second data string excluding. Therefore, since the average value of the reproduction signal of each data string can be separated and detected easily and accurately, the calculation accuracy of the optimum recording power is improved.
- the first optimum recording power in the first test writing step is a modulation degree or modulation of a reproduction signal in an area where the first test writing is performed.
- the second optimum recording power in the second trial writing step is calculated from the reproduction signal asymmetry in the area where the second trial writing has been performed.
- asymmetry means the ratio of the positive peak value and the negative peak value to the average value level of the reproduction signal.
- the first optimum recording power in the first trial writing step is calculated from an asymmetry force of a reproduction signal in an area where the first trial writing has been performed.
- the second optimum recording power in the second trial writing step is calculated from the asymmetry force of the reproduction signal in the area where the second trial writing has been performed.
- each optimum recording power can be accurately calculated according to each test data.
- the second optimum recording power in the second trial writing step is the first data string in the trial writing area where the second trial writing is performed. It is calculated from the average value of the playback signal and the average value of the playback signal of the second data string.
- each optimum recording power can be accurately calculated according to each test data.
- the specific pattern is a minimum mark length of frl self-recording information.
- the optimum recording power is calculated separately from the other mark lengths with the minimum mark length as a specific pattern, it can be suitably applied to many recording media by a simple method.
- the specific pattern is a pattern according to a recording mark length immediately before or immediately after a recording information string, or both.
- a recording mark can be formed with high accuracy and recording with high accuracy can be performed.
- the recording information are divided into N groups (N: a natural number of 2 or more) according to the mark length, and the optimum value of the recording power of each group is calculated.
- N a natural number of 2 or more
- the Mth test data M is a natural number from 1 to N
- the predetermined Mth test data is written while the recording power of the group is varied in stages.
- a test writing process for calculating the optimum recording power of the Mth group from the reproduction signal of the data was provided for each group, and information was recorded based on the optimum recording power calculated for each group.
- the optimum recording power is calculated for each mark length, so that all the mark lengths can be formed with high accuracy and recording with high accuracy can be performed.
- N 3
- the third group is the minimum mark length of the recorded information
- the second group is the next of the recorded information.
- the first group is the other mark length of the recorded information.
- the third group is a minimum mark length of the recording information
- the second group is a reference period of the recording information.
- the mark length is an even multiple
- the first group has a mark length that is an odd multiple of the reference period of the recorded information except for the third group.
- the so-called 2T strategy which has been put to practical use in recent years with the high-speed recording of CD recording and DVD recording, has the minimum mark length of 3T mark length, even mark length, and odd marks excluding 3T.
- the present invention can be suitably applied to such a recording medium.
- the effect of the information recording method can be similarly achieved by information storage according to another feature of the present invention.
- the optimum recording power of a specific pattern of the recorded information and other patterns is calculated, respectively, and the information recording is performed as usual based on the calculated optimum recording power. Since all the mark lengths can be formed with high accuracy, it is possible to perform recording with high accuracy.
- the predetermined first test data is a data string in which the first test data excludes a specific pattern.
- the error of the reproduced signal detection value due to the fact that the recording data of a certain pattern is not optimized can be eliminated, and the first optimum recording power can be calculated with high accuracy.
- the predetermined second test data is a second data obtained by removing the specific pattern from the first data string obtained by operating a specific pattern and the recording information. Since the data string is a repeated data string, the average value of the reproduction signal of each data string can be separated and easily detected with high accuracy, and the calculation accuracy of the optimum recording power can be improved. ⁇
- the first optimum recording power in the first trial writing step is calculated from the modulation degree of the reproduction signal in the area where the first trial writing has been performed or the rate of change of the modulation degree. Since the second optimum recording power in the trial writing process of 2 is calculated from the asymmetry of the reproduction signal in the area where the second trial writing was performed, each optimum recording power is accurately determined according to each test data. Can be calculated.
- the first optimum recording power in the first trial writing step is calculated from the asymmetry force of the reproduction signal in the area where the first trial writing has been performed, and the second trial writing step. Since the second optimum recording power in is calculated from the asymmetry of the reproduction signal in the area where the second trial writing was performed, each optimum recording power can be accurately calculated according to each test data. it can.
- the second optimum recording power in the second trial writing step is equal to the average value of the reproduction signal of the first data string in the trial writing area where the second trial writing is performed and the second optimum recording power. Since it is calculated from the average value of the reproduction signal of the data string, each optimum recording power can be accurately calculated according to each test data.
- the optimum recording power is calculated separately from the other mark lengths using the minimum mark length as a specific pattern, and thus can be suitably applied to many recording media by a simple method. Can do.
- a specific pattern can be recorded optimally according to a specific data pattern by making it a pattern according to the recording mark length immediately before or immediately after the recording information string or both. Even for recording media with different powers, a recording mark can be formed with high accuracy and high-precision recording can be performed. According to one aspect of the present invention, even if the recording medium has different optimum recording power depending on the mark length, the optimum recording power is calculated for each mark length, so that all mark lengths can be formed with high accuracy. Highly accurate recording can be performed.
- N 3
- the third group is the minimum mark length
- the second group is the next shorter mark length
- the first group is the other mark length.
- N 3
- the third group is the minimum mark length
- the second group is an even multiple of the reference period
- the first group is the reference period except for the third group.
- FIG. 1 is a block diagram showing a schematic configuration example of an optical information recording apparatus according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram regarding the P CA area and the test writing method.
- FIG. 3 is a characteristic diagram showing an eye diagram of a reproduction signal.
- FIG. 4 is a waveform diagram showing a light emission waveform example corresponding to each record information.
- FIG. 5 is a characteristic diagram showing the deviation characteristic from the ideal value due to the difference in mark length.
- FIG. 6 is a schematic flowchart showing an example of test writing process control.
- FIG. 7 is a characteristic diagram of the reproduction signal related to the test writing area.
- FIG. 8 is an explanatory diagram showing another embodiment of the second test pattern.
- FIG. 9 is a schematic flowchart showing an example of trial writing process control in another embodiment regarding trial writing when recording is performed at a plurality of recording power levels according to the mark length.
- Fig. 10 shows a test for recording at multiple recording levels according to the mark length.
- 12 is a schematic flowchart showing an example of trial writing process control in still another embodiment relating to writing.
- FIG. 1 is a block diagram showing a schematic configuration example of the optical information recording apparatus.
- the recording medium 1 used in this optical information recording apparatus is a recordable recording medium (ex. CD-R, CD-RW, DVD-R, DVD-RW, DVD + R, DVD + RW, DVD- RAM, MD, MO, etc. optical disc).
- the spindle motor 2 that rotates the recording medium 1 is controlled so as to have a constant linear velocity (CLV) or a constant angular velocity (CAV) according to a signal supplied from the servo controller 3.
- the optical pickup (PU) 4 irradiates the recording medium 1 with the light emitted from the semiconductor laser (LD), which is the light source, to record information, or receives the reflected light from the recording medium 1 and converts it into a received light signal.
- LD semiconductor laser
- the optical pickup 4 consists of a light source, a light receiving element that receives reflected light and converts it into a received light signal, an optical system, an actuator, and so on.
- the optical pickup 4 is also provided with a monitor light receiving unit that monitors a part of the light emitted from the light source, and the output light amount fluctuation of the light source is controlled by the monitor signal that is the output.
- a tilt detection light receiving unit for detecting the tilt of the recording medium 1 with respect to the irradiation light.
- the light reception signal processing unit 5 receives light reception signals from various light reception units arranged in the optical pickup 4 and performs various signal processing.
- the actuator is designed to always irradiate the light within a predetermined error against fluctuations such as the generation of the reproduction signal Srf from the received light signal and the fluctuation of the surface shake and the radial shake of the track along with the rotation of the recording medium 1 together with the controller 3.
- Drive and control focus servo control and track servo control.
- a servo error signal S sv is generated from the received signal and supplied to the servo controller 3.
- the optical pickup 4 is movable in the radial direction of the recording medium 1 and performs a seek operation so that the optical spot is irradiated to a desired position.
- the servo controller 3 controls the seek control and the rotation control of the recording medium 1 according to the address information recorded in the recording medium 1 in advance. Also performs functions such as tilt control.
- a wobble in which the recording track meanders at a predetermined frequency is formed in advance, and the received light signal processing unit 5 also generates a wobble signal Swbl from which the wobble component is extracted. Based on the wobble signal Swbl, the wobble signal processing unit 6 performs rotation control, detection of address information, and generation of a recording clock WCK serving as a reference clock at the time of recording.
- the reproduction signal processing unit 7 performs demodulation in accordance with a predetermined modulation method rule of the recording medium 1 reproduced from the reproduction signal Srf. Also, the recovered clock is extracted by the built-in PLL circuit. The demodulated data is supplied to the controller 8.
- the encoder 9 modulates the recording information supplied from the controller 8 in accordance with a predetermined modulation method rule, and supplies recording data Wdata. At this time, it is generated based on the recording clock WCK.
- the DVD recorder uses the E FM + modulation method, and the pulse length of the recording data Wdata is 3 T ⁇ : L 1 T, 14 T (T is the period of the recording clock WCK) Become.
- the LD drive unit 10 modulates the light source LD with a predetermined optical waveform according to the recording data Wdata and the recording clock WCK. Irradiation power and optical waveform information are set from controller 8. Also, a monitor light reception signal is input from the light reception signal processing unit 5, and based on this monitor light reception signal, control is performed so that the amount of light emitted from the light source LD becomes a desired value (so-called APC (Automatic Power Control) control is performed). .
- APC Automatic Power Control
- OPC Optimum Power Control
- one trial write is performed using, for example, one ECC block which is a recording information unit (this one ECC block is composed of 16 sectors), and each sector is written. Test-write while changing the recording power.
- the reproduced signal S rf in the area where the trial writing has been performed becomes as shown in FIG. 2 (c), so that the OPC detection unit 11 1 uses the maximum value I pk and the minimum value of each sector of the reproduced signal Srf.
- Fig. 3 shows an example of the eye diagram of the playback signal Srf.
- the controller 8 reproduces the area in which the test writing was performed, detects these values, performs a predetermined calculation from these values, and calculates the optimum recording power. Details of this calculation operation will be described later.
- test signal generator 12 generates test writing data (test pattern) when performing test writing. This trial writing data is supplied to the encoder 9, and at the time of trial writing, this is selected and outputted to the LD drive unit 10.
- the controller 8 controls recording of the entire apparatus by exchanging recording / reproduction information and command communication with a host computer (not shown).
- FIG. Figure 4 (a) shows the recording clock WCK
- Figure 4 (b) shows the recording data Wdata
- Figure 4 (c) shows the optical waveform when the mark length of the recording data Wdata is 3 T (1) to 14T (10).
- Irradiation powers are set to be bottom power Pb, erase power Pe, and write power Pw (3 T to l 4T, respectively, Pw 3 to Pwl 4).
- 4T and 5T, 6 ⁇ and 7 ⁇ , 8 ⁇ and 9T, and 10T and 11 ⁇ each have the same number of pulses.
- FIG. 6 is a flowchart showing an algorithm for calculating the optimum recording powers P w (opt) and P wex (opt) in accordance with the trial writing process in the process control related to the recording operation. Such calculation of the optimum recording power is performed as preparation for the start of information recording.
- the first trial writing process or first trial writing means for calculating the optimum recording power Pw (opt) and the optimum recording power Pwex (opt ) Is calculated by the second trial writing process or the second trial writing means.
- a first test pattern used in the first test writing process is generated (step S1).
- the first test pattern is supplied from the encoder 9 as recording data Wdata.
- step S 3 the area trial-written in step S 2 is reproduced, and the power at which the sector in which the reproduction signal Srf is best obtained is recorded is calculated as the optimum recording power Pw (opt).
- the maximum value Ipk, minimum value Ibt, and average value (DC value) Idc of the reproduction signal Srf in each sector are detected. And for each sector, the maximum value Ipk, minimum value Ibt, and average value (DC value) Idc of the reproduction signal Srf in each sector are detected. And for each sector, the maximum value Ipk, minimum value Ibt, and average value (DC value) Idc of the reproduction signal Srf in each sector are detected. And for each sector,
- the reproduction signal Srf of the area recorded with the optimum recording power of the other marks is as shown in FIG. That is, since the average value I dcA excluding the 3 T mark length is different from the average value I dc 3 of the 3 T mark (for example, 3 T repetitive pattern), the detected average value I dc is the average excluding the 3 T mark. There is an error with the value I dcA, and as a result, an incorrect optimum recording power is calculated because an incorrect value is also calculated for asymmetry 3.
- the data pattern excluding the 3T mark length is used in the first trial writing process, such a problem does not occur and the optimum recording power can be accurately calculated.
- the second method uses the rate of change ⁇ with respect to the recording power of the modulation level m of the reproduced signal as an index. Similarly to the above, the maximum value I pk and the minimum value I bt of the reproduction signal S rf in each sector are detected. And
- the modulation degree m is calculated.
- the rate of change ⁇ of the modulation factor m with respect to the recording power is calculated from the calculated modulation factor m and the recording power Pw at that time.
- the recording power Pt at which the rate of change 0 becomes a predetermined value is obtained, and a value obtained by multiplying this by a predetermined coefficient k is determined as the optimum recording power Pw.
- predetermined values and coefficient k values predetermined for each type of recording medium 1 and each recording apparatus are used.
- a combination of these methods may be used, or a jitter detection unit may be provided to calculate the recording power that provides the minimum jitter.
- a second test pattern used in the second test writing process is generated.
- the second test pattern is a data pattern that includes all mark lengths, that is, recorded data Wdata obtained by modulating normal data (for example, data supplied from the controller 8 with arbitrary data or fixed data) by the encoder 9. Good.
- this trial writing area may be overwritten on the first trial writing area in step S2, or the second trial writing after erasing once. You can go.
- the first test writing may be performed in the first half of the test writing area (for example, 1 E CC block) that can be used at one time, and the second test writing may be performed in the second half.
- step S 6 the area written by trial writing in step S 5 is reproduced, and the power in which the sector where the reproduction signal S rf is best obtained is calculated as the second optimum recording power P wex (opt).
- the maximum value I pk, minimum value I bi :, and average value (DC value) I dc of the playback signal Srf in each sector are detected as in step S3.
- (1) Calculate asymmetry i3. Then, the power at which the sector whose asymmetry 3 is closest to 0 may be calculated as the optimum recording power Pwex (opt). Alternatively, an approximate expression between the recording power Pwex and the asymmetry may be calculated, and the recording power at which 3) 0 may be calculated.
- the average value I dc A excluding the 3 T mark length is 0. It is a value.
- the trial writing process is completed by calculating the optimum recording powers Pw (opt) and Pwex opt), respectively.
- all mark lengths can be accurately formed by recording based on the optimum recording powers Pw (opt) and Pwex (opt) calculated in this way. Can be done.
- Test pattern TP 1 and 3 T Repeat pattern 3 When TP is written on a trial basis, it repeats at a predetermined cycle in sync with the sector, so the average value is detected in sync with the sector during playback. By doing so, it is possible to easily detect the average values I dcA and ⁇ I dc 3. Note that the repetition period of the first test pattern TP 1 and the 3T repetition pattern 3 TP may be set in consideration of the average value detection band of the reproduction signal. In addition, when calculating the optimum recording power with the change rate ⁇ of the modulation degree m in step S3, even if the 3 ⁇ mark is recorded with a value different from the optimum power, the modulation degree m and its change rate ⁇ are almost equal.
- the first test pattern TP 1 is a data pattern that includes all mark lengths, that is, normal data, and Pw3 can be changed by changing the recording power Pw.
- the recording medium 1 has been described assuming a phase change recording medium.
- the OPC method as in this embodiment can be suitably applied to a recording method in which recording is performed with different recording powers for the 3T mark length and other mark lengths.
- step S11 a first test pattern used in the first test writing process is generated.
- the first test pattern is composed of data patterns excluding the 3T mark length and 4T mark length in the recorded information, and the prescribed modulation rule is satisfied. 'In the first trial writing process, this first test pattern is supplied from the encoder 9 as the recording data Wdata.
- step S 13 the area trial-written in step S 12 is reproduced, and the portion in which the sector in which the reproduction signal S rf is best obtained is calculated as the optimum recording power P w (opt).
- the above-described example can be applied to the quality evaluation of the reproduction signal.
- step S14 a second test pattern used in the second trial writing process is generated.
- the second test pattern consists of a data pattern excluding the 3T mark length, and the prescribed modulation rule is satisfied.
- step S16 the area trial-written in step S15 is reproduced, and the power at which the sector in which the reproduction signal S rf is best obtained is calculated as the optimum recording power P w 4 (opt).
- the quality of this reproduction signal can be evaluated in the same manner as step S6.
- the second test pattern is the same as shown in Fig. 8.
- the first test pattern and the 4T repeating pattern may be repeated alternately.
- a third test pattern used in the third trial writing process is generated.
- the third test pattern may be a data pattern including all mark lengths, that is, recording data Wdata obtained by modulating normal data (for example, data supplied from the controller with arbitrary data or fixed data) by the encoder 9.
- Pw 4 (opt) is set, and this third test pattern is recorded in the trial writing area while changing the recording parameter Pw 3 for each sector.
- step S 19 the area written by trial writing in step S 18 is reproduced, and in the same manner as in step S 16, the area where the reproduction signal Srf is best obtained is calculated as the optimum recording power Pw 3 (opt). To do.
- N natural number of 2 or more
- the optimum value of the recording power of each group is calculated.
- a predetermined M-th test data is trial-written while the recording power of the M-th (M: natural number from 1 to N) group is gradually changed with respect to the area, and the first test data is recorded from the reproduction signal of the recorded test-write data.
- the trial writing process is completed by calculating the optimum recording powers P w 3 (opt), P w 4 (opt) and P w (opt) in this way.
- P w 3 (opt) the optimum recording powers
- P w 4 (opt) the optimum recording power
- the third test pattern is composed of data patterns excluding the 4 T mark length, the second trial writing and the third trial writing are performed in succession, and then these two trial writing areas are played back.
- the optimum recording power Pw 4 (opt) and Pw 3 (opt) may be calculated. That is, steps Sll, SI 2, SI 3, SI 4, SI 5, SI 7, SI 8, SI 7, SI 9 are processed in this order. In this way, the step of switching between recording and reproduction processing (such as access time to the target test writing area) can be omitted, so that the test writing process time can be shortened.
- step S21 a first test pattern is generated.
- This first test pattern consists of a data pattern consisting of the first group of mark lengths.
- step S22 the first test pattern is recorded in the test writing area while changing the recording power PwA for each sector.
- step S 23 the area written by trial writing in step S 22 is reproduced, and the portion in which the sector where the reproduction signal S rf is best obtained is calculated as the optimum recording power P w A (opt).
- the above-described example can be applied to evaluate the quality of the reproduced signal.
- step S24 a second test pattern is generated.
- This second test pattern consists of a data pattern consisting of the second group mark length, or a data pattern consisting of the first group and second group mark lengths.
- step S 25 the second test pattern is recorded in the test writing area while changing the recording power PwB for each sector. If the second test pattern includes the first group mark length, the optimum recording power PwA (opt) calculated in step S23 is set.
- step S26 the area trial-written in step S25 is played back and the playback signal is
- the optimum recording power P w B (opt) is calculated by recording the sector in which the sector with the best S rf is recorded.
- the above-described example can be applied to evaluate the quality of the reproduced signal.
- step S 27 a third test pattern is generated.
- This third test pattern consists of a data pattern that includes all mark lengths.
- step S 28 the recording power P wA of the first group is calculated as the optimum recording power P wA (opt) calculated in step S 23 and the recording power P wB of the second group is calculated in step S 26. Set the recording power P w B (opt) and record this third test pattern in the trial writing area while changing the recording power P w C for each sector.
- step S 2 9 the area trial-written in step S 28 is reproduced, and the power at which the sector where the reproduction signal Srf is best obtained is recorded is the optimum recording power P w C ( opt).
- N natural number of 2 or more
- the optimum value of the recording power of each group is calculated.
- a predetermined M-th test data is trial-written while the recording power of the M-th (M: natural number from 1 to N) group is gradually changed with respect to the area, and the first test data is recorded from the reproduction signal of the recorded test-write data.
- a test writing process for calculating the optimum recording power of group M is provided for each group.
- Group 3 is the minimum mark length of recorded information minus 3 T mark length
- the trial recording process is completed by calculating the optimum recording powers P w A (opt), P w B (opt) and P w C (opt).
- P w A (opt) the optimum recording powers obtained in this way.
- the specific pattern that varies the recording power has been described as a predetermined mark length (for example, the minimum 3 T mark length), but this specific pattern is a combination of the data patterns of the recording data Wdata.
- the pattern according to the recording mark length immediately before or after the recording information string or both of them and the recording mark length can be similarly applied.
- the recording mark length of 3 T or more immediately before the space length is 3 T
- the recording power may be different from other mark lengths, and the optimum recording power may be calculated by performing trial writing by applying the embodiment described in FIG.
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04717797A EP1635337A4 (en) | 2003-06-13 | 2004-03-05 | DATA RECORDING METHOD AND DATA RECORDING DEVICE |
| US10/937,285 US7301870B2 (en) | 2003-06-13 | 2004-09-10 | Information recording method and an information recording apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003168616A JP2005004906A (ja) | 2003-06-13 | 2003-06-13 | 情報記録方法及び情報記録装置 |
| JP2003-168616 | 2003-06-13 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/937,285 Continuation US7301870B2 (en) | 2003-06-13 | 2004-09-10 | Information recording method and an information recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004112009A1 true WO2004112009A1 (ja) | 2004-12-23 |
Family
ID=33549338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/002806 Ceased WO2004112009A1 (ja) | 2003-06-13 | 2004-03-05 | 情報記録方法及び情報記録装置 |
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| Country | Link |
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| US (1) | US7301870B2 (ja) |
| EP (1) | EP1635337A4 (ja) |
| JP (1) | JP2005004906A (ja) |
| CN (1) | CN100377222C (ja) |
| TW (1) | TWI272593B (ja) |
| WO (1) | WO2004112009A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1798725A2 (en) | 2005-12-14 | 2007-06-20 | Taiyo Yuden Co., Ltd. | Apparatus and method for optical information recording and reproducing |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4253724B2 (ja) * | 2003-10-31 | 2009-04-15 | 独立行政法人産業技術総合研究所 | レーザビームの再生パワーの決定方法およびデータ記録再生装置 |
| JP4216204B2 (ja) * | 2004-01-30 | 2009-01-28 | シャープ株式会社 | 光記録条件設定方法、光記録再生装置、制御プログラム、及び記録媒体 |
| US7609601B2 (en) | 2004-03-31 | 2009-10-27 | Pioneer Corporation | Information recording apparatus, information recording method and information recording program |
| US7787335B2 (en) * | 2004-03-31 | 2010-08-31 | Pioneer Corporation | Information recording device, information recording method, and information recording program |
| JP4225282B2 (ja) * | 2005-02-10 | 2009-02-18 | 株式会社日立製作所 | 試し書き方法及び情報記録装置 |
| JP2007133920A (ja) * | 2005-11-08 | 2007-05-31 | Victor Co Of Japan Ltd | 情報再生方法及び情報再生装置 |
| KR100667837B1 (ko) * | 2005-11-21 | 2007-01-12 | 삼성전자주식회사 | 광디스크의 최적 기록 파워 결정 방법 및 광디스크 구동장치 |
| KR100682146B1 (ko) | 2005-12-19 | 2007-02-12 | 주식회사 대우일렉트로닉스 | 재기록 광디스크의 최적 기록 전압 설정 방법 |
| KR20090041435A (ko) * | 2006-09-15 | 2009-04-28 | 닛본 덴끼 가부시끼가이샤 | 광 조사 파워 조정 방법 및 정보 기록/재생 장치 |
| CN101197140B (zh) * | 2006-12-05 | 2011-07-27 | 鸿富锦精密工业(深圳)有限公司 | 光盘驱动器刻录功率调整方法及装置 |
| JP2009004097A (ja) * | 2008-10-06 | 2009-01-08 | Sharp Corp | 光記録条件設定方法、光記録再生装置、制御プログラム、及び記録媒体 |
| WO2010092821A1 (ja) * | 2009-02-12 | 2010-08-19 | パナソニック株式会社 | 情報記録再生装置および情報記録再生方法 |
| JP4692657B2 (ja) * | 2009-03-09 | 2011-06-01 | 株式会社日立製作所 | 試し書き方法及び情報記録装置 |
| JP4567090B2 (ja) * | 2009-11-04 | 2010-10-20 | シャープ株式会社 | 光記録条件設定方法、光記録再生装置、制御プログラム、及び記録媒体 |
| US20110112913A1 (en) * | 2009-11-12 | 2011-05-12 | Ian Murray | System and method for live music performance digital recording, distribution, and digital advertising |
| WO2011112610A1 (en) * | 2010-03-08 | 2011-09-15 | Doug Carson & Associates, Inc. | Writing repeating patterns of features to a substrate |
| US8395977B1 (en) * | 2010-06-30 | 2013-03-12 | Marvell International Ltd. | Method and apparatus for calibrating write strategy |
| US9472212B2 (en) * | 2015-02-17 | 2016-10-18 | Seagate Technology Llc | Optimized recording condition for heat-assisted magnetic recording |
| US9842619B1 (en) | 2016-04-27 | 2017-12-12 | Seagate Technology Llc | Selecting laser power based on writing to a set of consecutive user data wedges |
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- 2004-03-05 CN CNB2004800164754A patent/CN100377222C/zh not_active Expired - Fee Related
- 2004-03-05 WO PCT/JP2004/002806 patent/WO2004112009A1/ja not_active Ceased
- 2004-03-12 TW TW093106754A patent/TWI272593B/zh not_active IP Right Cessation
- 2004-09-10 US US10/937,285 patent/US7301870B2/en not_active Expired - Fee Related
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| JPH11175976A (ja) * | 1997-12-09 | 1999-07-02 | Hitachi Ltd | 情報記録装置 |
| JP2000231719A (ja) * | 1998-09-14 | 2000-08-22 | Matsushita Electric Ind Co Ltd | 光学情報の記録再生装置および情報記録媒体 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1798725A2 (en) | 2005-12-14 | 2007-06-20 | Taiyo Yuden Co., Ltd. | Apparatus and method for optical information recording and reproducing |
| EP1798725A3 (en) * | 2005-12-14 | 2009-06-10 | Taiyo Yuden Co., Ltd. | Apparatus and method for optical information recording and reproducing |
| US7738336B2 (en) | 2005-12-14 | 2010-06-15 | Taiyo Yuden Co., Ltd | Apparatus and method for optical information recording and reproducing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100377222C (zh) | 2008-03-26 |
| TWI272593B (en) | 2007-02-01 |
| JP2005004906A (ja) | 2005-01-06 |
| TW200428376A (en) | 2004-12-16 |
| CN1806279A (zh) | 2006-07-19 |
| US7301870B2 (en) | 2007-11-27 |
| EP1635337A1 (en) | 2006-03-15 |
| US20050030863A1 (en) | 2005-02-10 |
| EP1635337A4 (en) | 2009-04-01 |
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