WO2005029474A1 - 情報記録装置及び情報記録システム - Google Patents
情報記録装置及び情報記録システム Download PDFInfo
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- WO2005029474A1 WO2005029474A1 PCT/JP2004/002292 JP2004002292W WO2005029474A1 WO 2005029474 A1 WO2005029474 A1 WO 2005029474A1 JP 2004002292 W JP2004002292 W JP 2004002292W WO 2005029474 A1 WO2005029474 A1 WO 2005029474A1
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- WO
- WIPO (PCT)
- Prior art keywords
- recording
- information
- recorded
- medium
- strategy
- Prior art date
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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
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
- G11B27/26—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording by photoelectric detection, e.g. of sprocket holes
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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
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/216—Rewritable discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/218—Write-once discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
-
- 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
- G11B7/00456—Recording strategies, e.g. pulse sequences
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
Definitions
- the present invention relates to an information recording device that records information on an information recording medium on which information can be recorded, and an information recording system including the information recording device.
- Phase-change optical recording media such as CD-ROM (Compact Disc Read Only Memory) and CD-R (Compact Disc Recordable) have become widespread.
- Phase-change optical recording media such as CD-RW (Compact Disc Rewritable) have been developed and widely used because they are easily compatible with CD-ROM and CD-R.
- Phase-change optical recording media are recorded at twice the linear velocity (24-28 m / s) in accordance with the Orange Book Part III (ver 1.0) published in October 1996. Standards have been determined for
- Optical disk devices capable of recording, reproducing, or rewriting information on such a phase-change optical recording medium at a high density have become widespread.
- Japanese Patent Application Laid-Open No. 2000-2843443 discloses that a user can obtain information on an optical disc on which information can be recorded, such as CD-R / RW, DVD-R / RW, DVD + R / RW.
- the disclosure is made in accordance with necessary recording conditions such as the power and pulse width of a recording pulse emitted from a recording laser light source.
- Japanese Patent Application Laid-Open No. 2000-3343433 discloses a technique in which optimal recording strategy information is recorded in advance on an optical disc, and an optical disc apparatus determines a recording strategy with reference to the information. Has been disclosed.
- a user when a user performs data recording on an optical disc on which information can be recorded, such as CD-RZRW, DVD-R / RW, DVD + R / RW, etc., light is emitted from a recording laser light source.
- the recording conditions such as the power and pulse width of the recording pulse (for example, each parameter as disclosed in Japanese Patent Application Laid-Open No. 2000-284343) are set. You need to decide.
- This recording condition is called a recording strategy.
- the optimum recording strategy depends on the recording material of the optical disc and the properties of the substrate, and generally differs depending on the disc manufacturer and disc type, so the optimal parameters must be selected for each optical disc.
- optimal recording strategy information is recorded on an optical disc in advance, and the optical disc apparatus determines a recording strategy by referring to this information. I am trying to do it.
- the recording conditions written on the optical disk cannot always be used for all optical disk devices. This is because the optical system parameters such as the laser wavelength and the numerical aperture (NA) of the objective lens, the rise time of the recording pulse, etc., differ depending on the manufacturer of the optical disk device. Therefore, even if the technique disclosed in Japanese Patent Application Laid-Open No. 2002-334344 is used, information may not be recorded using an optimal recording strategy.
- NA numerical aperture
- the optical disk device Before recording information, the optical disk device reads information such as the manufacturer and version number of the currently loaded optical disk from the optical disk, searches for the recording strategy information stored in the optical disk device, and registers the information. If there is information that has been registered, it may be possible to use the registered recording strategy. However, it is difficult to set an optimal recording strategy for an optical disk (unknown optical disk) that is not registered as recording strategy information in the optical disk device. There is a problem that information must be recorded using a certain predetermined recording strategy.
- the optical disc apparatus performs recording on an unknown optical disc having no information using a predetermined basic strategy with the recording power obtained by the OPC.
- the optimal information cannot be recorded depending on the recording strategy obtained by the basic strategy and the OPC. Disclosure of the invention
- An object of the present invention is to record good information on an information recording medium having recording condition information in a predetermined area and on an unknown information recording medium having no such information. It is an object of the present invention to provide an information recording device and an information recording system that can perform such operations.
- an information recording apparatus for recording information on an information recording medium capable of recording information includes a recording condition for the information recording medium. Means for judging whether or not the information is recorded in a predetermined area inside or outside the device; recording condition reading means for reading the recording condition when the recording condition is recorded; information based on the recording condition A first recording means for recording data; and when recording conditions are not recorded, performing test writing under predetermined recording conditions in a test writing area of the information recording medium, and reproducing and evaluating the recorded information. Means.
- the evaluation means can perform the evaluation based on the degree of the jitter of the reproduced recorded information signal. Further, the evaluation means can perform the evaluation based on the error rate of the reproduced recorded information signal.
- the above-described information recording device may further include a notifying unit that notifies the user of the evaluation result.
- the information recording apparatus further receives, from the user, an instruction as to whether or not the information is to be recorded on the information recording medium when the information means notifies that the reproduction is not possible or is low.
- Receiving means when receiving an instruction to record information from the user from the receiving means, a second recording means for recording information based on predetermined recording conditions; and a notice for not recording information by the receiving means. Instructions for you Means for stopping the recording of information when accepted from the user.
- an information recording system comprising the above-mentioned information recording device; and a host computer connected to the information recording device via a predetermined interface.
- FIG. 1 is a block diagram of an information storage device according to an embodiment of the present invention.
- FIG. 2 is a waveform diagram illustrating a relationship between recording data and a recording pulse in an information storage device according to one embodiment.
- FIG. 3 is an explanatory diagram illustrating a strategy table in the information recording device of one embodiment.
- FIG. 4 is an explanatory diagram in the case where the low-frequency component of the RF signal is removed (AC coupling) and the upper envelope level and the lower envelope level are detected.
- FIG. 5 is an explanatory diagram for explaining the relationship between the 'record P and the parameter.
- FIG. 6 is a flowchart of a process executed by the information recording apparatus according to the embodiment.
- FIG. 7 is a flowchart of another process executed by the information recording device of one embodiment.
- FIG. 8 is a flowchart of another process executed by the information recording apparatus of the embodiment.
- FIG. 9 is a flowchart of another process executed by the information recording device of one embodiment.
- FIG. 1 is a block diagram showing an electrical connection of the information recording device 1 according to the embodiment of the present invention.
- This information recording 1 is used to record information on media 101, which are information recording media such as CD-R / RW, DVD-R / RW, and DV D + R / RW. It is a device that can reproduce information and information.
- the medium 101 rotates using a spindle motor (not shown) as a drive source.
- the optical system 102 is composed of a predetermined optical element, and focuses a light beam from the laser light source 103 on the recording surface of the medium 101.
- the optical system 102 and the laser light source 103 are arranged on an optical head (not shown) called an optical pickup, and are emitted from the optical system 102 using a predetermined motor as a drive source.
- the light spot of the laser beam can be focused on an arbitrary position on the medium 101.
- the laser light source 103 generally uses a semiconductor laser, and is driven by a laser driving circuit 104 to emit light.
- the light emitted from the laser light source 103 has a constant power when reading recorded information on the medium 101, but is pulse-modulated when recording data.
- This pulse modulation is, for example, as shown in FIG. That is, in the case of a CD or DVD, the recording data (Write data) from the host device 105 such as a host computer uses a predetermined channel bit length T as a unit of pulse, and the number of pulses is, for example, three. It is expressed by changing between 11 T.
- the recording pulse (laser pulse) of the laser is obtained by further dividing the “1” (recording mark portion 201) portion of the write data.
- the divided pulse 202 in the recording mark 201 is called a multi-pulse.
- the first pulse 203 of the multi-pulse is often a slightly longer pulse in order to rapidly raise the temperature of the medium 101 to promote melting.
- This pulse width is represented by Ttop.
- Tmp From the 4th T, a multi-pulse in T units is obtained, and each pulse width is represented by Tmp. Determining such pulse parameters Ttop, Tmp, etc. is called a pulse strategy or a recording strategy.
- a microcomputer is provided, and a recording strategy setting unit 10 is provided by a command from a controller 109 that centrally controls the entire information recording device 1 based on a control program 110 recorded in a ROM or the like.
- 6 sets the recording strategy of the laser drive circuit 104.
- the recording strategy is predetermined for each type of media 101 and is stored in the strategy storage unit 111.
- the strategy table 3 shown in FIG. It is registered as table data as shown in 01.
- the strategy table 301 includes @ ⁇ information that is previously engraved on the media 101 (that is, for each type of media 101 sold by each manufacturer, Manufacturer ID (information that identifies the manufacturer of the media 101). 302) and the Media Type ID (303), which is information for specifying the type of the media 101, and the recording conditions of pulse width Ttop (304) and pulse width Tmp (305) are associated with each other. It is registered.
- the strategy storage unit 111 is a nonvolatile memory such as a flash ROM.
- the configuration of the strategy tape 301 shown in FIG. 3 is merely an example, and more pulse parameters and information on recording power may be stored, and information for discriminating the media 101 may store more types. Is also good.
- the controller 109 determines the recording strategy of the media 101 based on the 3 ⁇ 4S (J information, and sets it in the strategy setting unit 106.
- a name “Default” is registered. This is a parameter that is referred to in the case of the medium 101 that does not correspond to the stored Manufacturer ID 302 or Media Type ID 303.
- the discriminating unit 108 reads the above-described type information (engraved on the medium 10 ′ 1) from information read from the medium 101 via the optical system 102 when the medium 101 is loaded into the information recording device 1.
- the manufacturer ID 302 and the Media. Type ID 303) are read at high speed, and the decoded type information is sent to the controller 109.
- the reproduction signal evaluation unit 107 records information in a test writing area of the unknown medium 101 (described later), reproduces and evaluates the recorded signal, and sends the evaluation result to the controller 109. This playback signal is evaluated based on the RF signal jitter or error rate.
- the host device 105 is a host computer of the information recording device 1, is connected to the information recording device 1 via a predetermined interface, and communicates with the host device 105. 1 constitutes an information recording system.
- the host device 105 sends recording data for recording on the medium 101 to the laser drive circuit 104.
- the controller 109 Before recording the information on the medium 101, the controller 109 searches and sets the strategy parameters corresponding to the loaded medium 101 from the strategy table 301, but the strategy table 310 In the case of the media 101 not registered in the host, the upper device 105 is notified that the media is unknown. Upon receiving this notification, the higher-level device 105 displays a message to the effect that the medium 101 is an unknown media on the display device.
- the test writing is performed by sequentially changing the recording speed at a certain linear velocity, and a predetermined test writing area of the medium 101 (the inner and outer peripheral parts of the medium 101 are used for the test writing). This is an operation to record the specified information on the media and then play back the recorded information to evaluate the recording state and determine the recording power at which the optimum recording state of the media 101 is obtained. ).
- the power setting unit 113 controls the laser drive circuit 104 according to a command from the controller 109. .
- the recorded area is reproduced by an optical system 102 of a pickup (not shown) to obtain a reproduction signal RF. Then, by evaluating appropriate parameters of the RF signal, an optimum recording state can be evaluated.
- the / 3 value detector 114 evaluates, for example, a certain parameter from the reproduction signal RF.
- the J3 value detection section 114 removes the low frequency component of the RF signal (AC coupling) and detects the upper envelope level a and the lower envelope level b. This will be described with reference to FIG.
- the reflectivity decreases at the recording mark portion 201, and the RF signal becomes low at the low reflection portion.
- the time change or address change (Time (Address)) of the recording power (P) is shown by a graph.
- the recording power is recorded in 10 steps.
- the range in which the recording power is changed is called the OPC range, and the central power used as the reference at this time is called Pdef.
- the OPC range is changed in 10 steps, for example, in the range of + 40% and 30% with respect to the center power Pdef, or, for example, +5 mW, 1 4 with respect to the center power Pdef
- a method of changing by 1 mW in the range of mW can be considered.
- the recording power Pope serving as ⁇ target is obtained. Since the Popt may slightly fluctuate depending on the conditions at the time of performing the OPC such as a temperature change, it is preferable that the recording power Pope be obtained as close to the central power Pdef as possible under normal conditions. Further, since the recording power Pope often differs for each medium 101, it may be set together with a write strategy corresponding to the type of each medium 101.
- FIG. 6 is a flowchart of such processing.
- the controller 109 performs test writing on the medium 101 loaded by the above-described operation to determine an optimum recording power (step S1).
- the manufacturer ID 302 and the media type ID 303 of the medium 101 are read by the above-described operation, and a strategy table 301 is searched by the manufacturer ID 302 and the media type ID 303 (step S2).
- step S3 If the media that matches the Manufacturer ID 300 and Media Type ID 303 is not registered in the strategy table 301 (judgment means) (N in step S3), the strategy Since there is no corresponding recording strategy inside, and it is an unknown medium (a medium for which an optimal recording strategy cannot be set), a predetermined basic strategy is set (step S6). Then, information is recorded in the test writing area using the basic strategy (step S7), and the recorded information is reproduced (step S8). Then, the reproduced signal is evaluated based on the jitter (step S9). In this example, for example, a threshold value of 10% is set for the jitter and the evaluation is performed. However, this should be determined so that the recorded information can be reproduced. These steps S6 to S9 realize the evaluation means.
- step S9 If the jitter is equal to or less than 10% (Y in step S9), the recorded information can be reproduced, and the recording of information on the medium 101 is started (step S10). If the jitter is 10% or more ((in step S9) and the evaluation of the reproduced signal does not satisfy a certain standard, the information recorded by the basic strategy cannot be reproduced. The recording of the information for is stopped (step S11).
- FIG. 7 is a flowchart illustrating another example of the process performed by the information recording device 1 from the time when the test writing is executed and the recording on the medium 101 is started.
- step S9 the signal reproduced in step S8 is evaluated using an error rate instead of jitter.
- the error rate of the reproduced signal is evaluated by, for example, setting a threshold of 10% for the error rate. In this case, however, the error rate should be determined to the extent that the recorded information can be reproduced.
- the error rate is i 0% or less (Y of step S 9)
- it is possible to reproduce the recorded information to start recording of information in the media 1 0 1 (Step S 1 0).
- the error rate is 10% or more ((in step S9) and the evaluation of the reproduction signal does not satisfy a certain standard, the information recorded by the basic strategy cannot be reproduced.
- the recording of the information for 1 is stopped (step S11).
- the other steps with the same reference numerals as those in FIG. 6 are the same as those in the processing in FIG. 6, and thus detailed description is omitted.
- FIG. 8 is a flowchart for explaining another example of the processing executed by the information recording device 1 from the execution of the test writing to the start of the recording on the medium 101.
- steps S1 to S9 are the same as the processes in FIGS. 6 and 7, and a detailed description will be omitted.
- step S9 the reproduced signal in step S8 is evaluated to determine whether or not information can be reproduced.Here, even if jitter is used as shown in FIG. An error rate may be used.
- step S9 the reproduced signal in step S8 is evaluated, and if it is determined that there is no possibility or low possibility of reproducing the information (N in step S9), This is reported to the user by notifying the higher-level device 105 or displaying a message on the display device of the information recording device 1 (not shown) (step S12).
- FIG. 9 is a flowchart for explaining another example of the processing executed by the information storage unit 1 from the execution of the test writing to the start of the recording on the medium 101.
- steps S1 to S10 and SI2 are the same as those in FIG. 8, and a detailed description thereof will be omitted.
- the user is notified of the fact that there is no possibility or low information reproduction to the host device 105, or a message is displayed on the display device of the information storage device 1 (not shown), for example.
- the notification is made (notification means) (Step S12)
- the user receives the selection of the ability to record the information and the selection of whether or not to stop, and performs the processing according to the selection (Steps S13 to S15). ).
- step S13 when the user selects a start of information recording by performing a predetermined operation on the host device 105 or by operating a predetermined operation button (not shown) of the information recording device 1 (Acceptance means) (Y in step S13)
- the default is set to the strategy table 301.
- Recording of information on the medium 101 is started using a recording strategy or the like registered as (second recording means) (step S14).
- the recording of information on the medium 101 is stopped (stopping means) (step S15).
- the recording strategy of the various media 101 is stored in the strategy table 301 in the information recording device 1 and searched for (step S2).
- the present invention is not limited to this, and the recording strategy of the various media 101 may be recorded in a predetermined area outside the information recording device 1 and read.
- the processing of steps S6 to S10 and S12 to S15 may be performed on the medium 101.
- the present invention is not limited to the specifically disclosed embodiments described above, and various modifications and improvements may be made within the scope of the present invention.
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04714897A EP1667121A4 (en) | 2003-09-19 | 2004-02-26 | REORDERING INFORMATION AND INFORMATION RECORDING SYSTEM |
US10/927,411 US7539099B2 (en) | 2003-09-19 | 2004-08-27 | Information recording apparatus and an information recording system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-327897 | 2003-09-19 | ||
JP2003327897 | 2003-09-19 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/927,411 Continuation US7539099B2 (en) | 2003-09-19 | 2004-08-27 | Information recording apparatus and an information recording system |
Publications (1)
Publication Number | Publication Date |
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WO2005029474A1 true WO2005029474A1 (ja) | 2005-03-31 |
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Family Applications (1)
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PCT/JP2004/002292 WO2005029474A1 (ja) | 2003-09-19 | 2004-02-26 | 情報記録装置及び情報記録システム |
Country Status (4)
Country | Link |
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US (1) | US7539099B2 (ja) |
EP (1) | EP1667121A4 (ja) |
CN (1) | CN1833275A (ja) |
WO (1) | WO2005029474A1 (ja) |
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JP4408422B2 (ja) * | 2005-03-25 | 2010-02-03 | 株式会社日立製作所 | 光記録装置 |
JP2008016164A (ja) * | 2006-07-10 | 2008-01-24 | Teac Corp | 光ディスク装置および記録ストラテジ決定方法 |
US7420759B2 (en) * | 2006-10-31 | 2008-09-02 | Samsung Electronics Co., Ltd. | Apparatus and method for internal calibration of normalized playback transfer curve in a hard disk drive |
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US7801211B2 (en) * | 2007-06-15 | 2010-09-21 | Advantest Corporation | Communication system, receiver unit, and adaptive equalizer |
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JP2003203338A (ja) * | 2001-12-28 | 2003-07-18 | Tdk Corp | 光記録媒体の記録方法及び光記録媒体 |
US7200080B2 (en) * | 2002-01-16 | 2007-04-03 | Yamaha Corporation | Optical disk recorder with reproduction quality control |
US20040160873A1 (en) * | 2003-02-19 | 2004-08-19 | Pereira David M. | Method and system for creating an optical drive write strategy for an unknown optical media |
US20050030860A1 (en) * | 2003-08-08 | 2005-02-10 | Gage Donald B. | Method and system for optical medium power calibration |
-
2004
- 2004-02-26 WO PCT/JP2004/002292 patent/WO2005029474A1/ja not_active Application Discontinuation
- 2004-02-26 EP EP04714897A patent/EP1667121A4/en not_active Withdrawn
- 2004-02-26 CN CNA200480022807XA patent/CN1833275A/zh active Pending
- 2004-08-27 US US10/927,411 patent/US7539099B2/en not_active Expired - Fee Related
Patent Citations (5)
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JPH04214208A (ja) * | 1990-02-12 | 1992-08-05 | Philips Gloeilampenfab:Nv | 情報記録装置 |
JPH0773469A (ja) * | 1992-11-20 | 1995-03-17 | Philips Electron Nv | 記録担体上に信号を記録する方法及び記録装置 |
JPH0916964A (ja) * | 1995-06-26 | 1997-01-17 | Pioneer Electron Corp | 光学式記録媒体および光ビームの供給パワー設定方法 |
JPH09167347A (ja) * | 1995-12-15 | 1997-06-24 | Sony Corp | 光学的記録再生装置および光学的記録再生方法 |
JP2001067672A (ja) * | 1999-08-31 | 2001-03-16 | Yamaha Corp | 光ディスクの適正記録速度判定方法および記録速度設定方法ならびに記録方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1667121A4 (en) | 2008-03-19 |
EP1667121A1 (en) | 2006-06-07 |
CN1833275A (zh) | 2006-09-13 |
US7539099B2 (en) | 2009-05-26 |
US20050063268A1 (en) | 2005-03-24 |
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