WO2006028114A1 - 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 - Google Patents
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 Download PDFInfo
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- WO2006028114A1 WO2006028114A1 PCT/JP2005/016393 JP2005016393W WO2006028114A1 WO 2006028114 A1 WO2006028114 A1 WO 2006028114A1 JP 2005016393 W JP2005016393 W JP 2005016393W WO 2006028114 A1 WO2006028114 A1 WO 2006028114A1
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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
- G11B7/007—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
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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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
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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
- G11B7/007—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
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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
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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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
- G11B7/24038—Multiple laminated recording layers
Definitions
- Information recording medium information recording apparatus and method, and computer program
- the present invention relates to an information recording medium such as a DVD, an information recording apparatus and method such as a DVD recorder, and a technical field of a computer program that causes a computer to function as such an information recording apparatus.
- the double-layer type optical disc is positioned as the first layer on the most front side (that is, the side close to the optical pickup) when viewed from the laser beam irradiation side when recording by the information recording apparatus. It has a first recording layer (referred to as “L0 layer” in the present application as appropriate), and further has a semitransparent reflection film located on the back side thereof (that is, on the side far from the optical pickup force).
- the second layer it has a second recording layer (referred to as “L1 layer” in this application as appropriate) located on the back side of the transflective film via an intermediate layer such as an adhesive layer, and further on the back side.
- a reflective film located on the surface.
- the L0 layer is irradiated with a laser beam for recording (or irradiated), so that the L0 layer
- information is recorded by the irreversible change recording method or the rewritable method by heating or the like, and the laser beam is focused on the L1 layer, so that the information is collected on the L1 layer.
- Recording by irreversible change recording by heating or the like Recording is performed by a irreversible change recording method by heating or the rewritable method.
- an OPC Opti
- mum Power Calibration sets the optimum power for recording power. That is, recording power calibration is performed.
- an appropriate recording operation on the optical disc can be realized. For example, when an optical disc is loaded and a write command is input, the light intensity is sequentially switched and the data for trial writing is recorded in the OPC area, so-called trial writing processing is executed.
- the optimum power can also be set by OPC (so-called running OPC) performed at the same time as the actual recording operation.
- Patent Document 1 Japanese Patent No. 3159454
- the recording condition of the recording layer on the back side (for example, L1 layer) when viewed from the laser light irradiation side is the same as that of the recording layer (for example, L0 layer) on the near side when viewed from the laser light irradiation side.
- the recording layer for example, L0 layer
- the majority of the current two-layer type optical disc is the force that records data on the recording layer on the front side after data is recorded on the recording layer on the front side.
- the present invention has been made in view of, for example, the above-described conventional problems. It is an object of the present invention to provide an information recording medium, an information recording apparatus and method, and a computer program that make it possible to obtain an optimum recording power appropriately even with an information recording medium having a plurality of recording layers.
- the information recording medium of the present invention irradiates the laser light through the first recording layer and the first recording layer for recording the recording information by irradiating the laser light. And a second recording layer for recording the recording information, wherein the second recording layer is for recording pattern information for obtaining the optimum power of the laser beam, and the recording information is not recorded.
- a first calibration area corresponding to the recording area of the first recording layer, and the leading part of the first calibration area is based on the leading part of the recording area of the first recording layer that is not recorded
- the pattern information is arranged at a position moved by a predetermined distance in the recording direction.
- various types of recording information can be recorded in each of a plurality of recording layers (that is, the first recording layer and the second recording layer).
- the plurality of recording layers may be formed in a laminated structure on one surface of the substrate, for example.
- the leading portion of the first calibration area is moved by a predetermined distance with reference to the leading portion of the recording area of the unrecorded first recording layer corresponding to the first calibration area.
- the head portion of the first calibration area has moved in the direction of recording pattern information relative to the head portion of the unrecorded recording area. That is, seeing from the side irradiated with laser light
- the top part of the first calibration area does not match the top part of the unrecorded recording area (or does not correspond). For this reason, when recording no-turn information, it is possible to maintain a state in which no recording information is recorded in the first recording layer. Even if information is recorded in the unrecorded area, the pattern information is recorded in the first calibration area corresponding to the unrecorded recording area as a result because the first calibration areas do not coincide with each other. It becomes possible to do. Alternatively, even if the information recording medium is decentered, it is possible to eliminate the adverse effect of decentering due to the mismatch of the head portion, and as a result, pattern information is recorded in the first calibration area corresponding to the unrecorded recording area. It becomes possible to do.
- the optimum power of the laser beam can be obtained appropriately.
- the recording area of the first recording layer in which the recording information is unrecorded is for managing at least one of recording and reproduction of the recording information.
- the pattern information is displayed.
- the recording information is recorded on the first recording layer, and the state can be maintained. Thereby, the optimum power can be obtained appropriately.
- the predetermined distance is a distance corresponding to at least an eccentricity between the first recording layer and the second recording layer.
- At least one of the first and second recording layers has ratio information indicating a ratio of the optimum power to a predetermined reference value, the reference value and the optimum power. And at least one of the difference information indicating the difference and the optimum power is recorded.
- the optimum power (or optimum power under a predetermined recording condition) can be obtained relatively easily by referring to the ratio information, difference information, and the like.
- an information recording apparatus of the present invention is the above-described information recording medium of the present invention (including various aspects thereof), and the first recording layer stores the pattern information.
- the recording information is recorded on an information recording medium for recording and having a second calibration area corresponding to a recording area of the second recording layer where the recording information is unrecorded.
- the reference power of the laser beam can be recorded
- the recording direction of the pattern information is the same as the recording direction of the recording information in the recording area of the first recording layer where the recording information is not recorded.
- the information recording apparatus of the present invention it is possible to record various types of recording information in each of a plurality of recording layers (ie, the first recording layer and the second recording layer).
- the plurality of recording layers may be formed in a laminated structure on one surface of the substrate, for example.
- a reference power that serves as a reference for the power value of the laser beam when recording information is recorded by the operation of the calibration means.
- the “reference power” in the present invention is a broad meaning representing various parameters that realize the power value in addition to the power value of the laser beam itself.
- the calibration means obtains this reference pattern by recording the pattern information in either or both of the first calibration area and the second calibration area of the information recording medium.
- the operation of the control means causes the recording information to be recorded in the direction in which the pattern information is recorded in the first calibration area and in the recording area of the first recording layer where the recording information is not recorded.
- the recording direction is the same direction. For this reason, even if recorded information is recorded in the unrecorded area, the pattern information can still be recorded in the first calibration area corresponding to the unrecorded area of the first recording layer. If the speed at which the pattern information is recorded in the first calibration area is faster than the speed at which the recorded information is recorded in the unrecorded area, the pattern information will be recorded in the first calibration area. This is because the recorded information has not been previously recorded in the corresponding first recording layer.
- the first calibration area corresponding to the unrecorded area can be surely secured by a size corresponding to the difference between the beginning of the first calibration area and the beginning of the unrecorded area.
- the pattern information in the first calibration area is faster than the speed at which the recorded information is recorded in the unrecorded area.
- the speed at which is recorded is generally faster. Therefore, in the first calibration area, the reference power can be obtained appropriately without being affected by the recording conditions of the first recording layer.
- the optimum power can be calculated by the operation of the calculating means.
- the information recording apparatus of the present invention that is, it is possible to calculate the optimum recording power of each recording layer for an information recording medium having a plurality of recording layers relatively easily. It becomes.
- the calibration unit controls the recording unit to record the pattern information in the second calibration area, and the recording information is unrecorded.
- First calibration means for obtaining a first reference power of the laser beam when recording the recording information in a recording area of the first recording layer corresponding to a recording area of the second recording layer; and for the first calibration
- the recording means is controlled to record the pattern information in an area, and the recording information is recorded in the recording area of the second recording layer corresponding to the recording area of the first recording layer where the recording information is unrecorded.
- Second calibration means for obtaining a second reference power of the laser beam for recording.
- the optimum power is recorded in the recording area of the second recording layer corresponding to the recording area after the recording information is recorded in the recording area of the first recording layer.
- the laser light when the recording information is recorded in the recording area of the first recording layer corresponding to the recording area of the second recording layer where the recording information is unrecorded.
- the first optimum power, which is the optimum power, and the recorded information are recorded
- the second optimum power which is the optimum power of the laser beam when the recording information is recorded in the recording area of the first recording layer corresponding to the recording area of the second recording layer,
- the first recording information is unrecorded.
- a third optimum power that is an optimum power of the laser beam when the recording information is recorded in a recording area of the second recording layer corresponding to a recording area of the recording layer, and the first recording in which the recording information has been recorded.
- the recording area of the second recording layer corresponding to the recording area of the layer includes at least one of the fourth optimum power, which is the optimum power of the laser beam when the recording information is recorded.
- the first reference noise and the second reference power obtained by the calibration means can also be optimum powers under predetermined recording conditions. Therefore, according to the information recording apparatus of the present invention, it is possible to appropriately calculate the optimum power that suitably corresponds to each recording condition of the first recording layer and the second recording layer.
- the calculation means calculates the optimum power using calculation information that is information for calculating the optimum power.
- the calculation means can calculate the optimum power relatively easily based on the calculation information.
- the information recording apparatus may further include storage means for storing the calculation information.
- the calculation means can calculate the optimum power relatively easily by referring to the calculation information recorded in the storage means.
- the calculated information includes a ratio information indicating a ratio of the optimum power with the reference power as a reference value. Also good.
- the calculation information may include a difference information indicating a difference between the reference power and the optimum power.
- the information recording method of the present invention is the above-described information recording medium of the present invention (including various aspects thereof), wherein the first recording layer records the pattern information.
- An information recording method in an information recording apparatus comprising: a recording step of recording the recorded information by controlling the recording means; and at least one of the first calibration area and the second calibration area A calibration step for obtaining a reference power of the laser beam by controlling the recording means so as to record pattern information, and the recording information on the first recording layer and the second recording layer based on the reference power.
- the calculation process for calculating the optimum power of the laser beam when recording to at least one of the recording layers and the direction in which the pattern information is recorded in the first calibration area are as follows. And a control step of controlling the recording means so as to be the same as the recording direction of the recording information in the recording area.
- the information recording method according to the present invention can also adopt various aspects.
- a computer program of the present invention is a computer program for recording control for controlling a computer provided in the above-described information recording apparatus of the present invention (including various aspects thereof),
- the computer is caused to function as at least part of the calibration unit, the calculation unit, and the control unit.
- the computer program of the present invention if the computer program is read from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, and a hard disk that stores the computer program and then executed by the computer, Alternatively, if the computer program is downloaded to a computer via communication means and then executed, the above-described information recording apparatus of the present invention can be realized relatively easily. [0038] Incidentally, in response to the various aspects of the information recording apparatus of the present invention described above, the computer program of the present invention can also adopt various aspects.
- a computer program product in a computer-readable medium is executable by a computer provided in the above-described information recording apparatus (including various aspects thereof) of the present invention.
- Program instructions are clearly embodied, and the computer is caused to function as at least part of the calibration means, the calculation means, and the control means.
- the computer program product of the present invention if the computer program product is read into a computer from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product, or
- a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product
- the computer program product which is a transmission wave
- the computer program product which is a transmission wave
- the computer program product may comprise a computer readable code (or computer readable instruction) that functions as the information recording apparatus of the present invention described above.
- the information recording medium of the present invention includes the first recording layer and the second recording layer, and the leading portion of the first calibration area is predetermined based on the leading portion of the unrecorded recording area. It has moved by the distance.
- the information recording apparatus and method according to the present invention include a recording means, a calibration means, a calculation means and a control means, or a calibration process, a calculation process and a control process. Therefore, even if the information recording medium has a plurality of recording layers, the optimum power can be calculated appropriately.
- FIG. 1 is a schematic plan view showing a basic structure of an optical disc having a plurality of recording areas according to an embodiment of an information recording medium of the present invention, and is associated with a schematic sectional view of the optical disc. It is a schematic conceptual diagram of a recording area structure in the radial direction.
- FIG. 2 is a data structure diagram conceptually showing an example of the data structure of the information recording medium in the embodiment.
- ⁇ 3] A table showing conditions for recording data on the information recording medium in this example.
- FIG. 4 is a block diagram conceptually showing the basic structure of the example of the information recording apparatus of the present invention.
- FIG. 5 is a flowchart showing the flow of the entire recording operation of the information recording apparatus in the example.
- FIG. 6 is a schematic timing chart showing one OPC process in the case of 16 power steps in OPC performed by the information recording apparatus in the example.
- FIG. 1 (a) is a schematic plan view showing the basic structure of an optical disc having a plurality of recording areas according to an embodiment of the information recording medium of the present invention
- FIG. FIG. 2 is a schematic cross-sectional view of FIG. 2 and a schematic conceptual diagram of a recording area structure in the radial direction associated therewith.
- the optical disc 100 is implemented in the recording surface on the disc main body having a diameter of about 12 cm as in the DVD, with the center hole 101 as the center.
- the lead-in area 102, the data recording area 107 and the lead-out area 108 or the middle area 109 according to the example are provided.
- a recording layer or the like is laminated on the transparent substrate 200 of the optical disc 100, for example.
- tracks such as a group track and a land track are alternately provided in a spiral shape or a concentric shape around the center hole 101.
- ECC block is a data management unit based on preformat addresses that can correct errors in recorded information.
- the present invention is not particularly limited to an optical disc having such three areas.
- the lead-in area 102, the lead-out area 108, or the middle area 109 does not exist, the data structure described below can be constructed. Further, as will be described later, the lead-in area 102, the lead-out area 108, or the middle area 109 may be further subdivided.
- the optical disc 100 constitutes an example of first and second recording layers according to the present invention described later, for example, on a transparent substrate, as shown in FIG. 1 (b).
- the LO layer and L1 layer are stacked.
- the optical disc 100 according to the present embodiment is not limited to the two-layer single side, that is, the dual layer, but may be the double-layer double side, that is, the dual layer double side. Furthermore, it is not limited to an optical disc having two recording layers as described above, but may be a multilayer type optical disc having three or more layers.
- FIG. 2 is a data structure diagram conceptually showing an example of the data structure of the information recording medium according to the present embodiment.
- the LO layer of the optical disc 100 includes a PCA (Power Calibration Area) 103, a recording management information area (Recording Management Area), which is a specific example of the “second calibration area” in the present invention. ) 104, a lead-in area 102, a data recording area 107, and a lead-out area 108 (not shown) are provided.
- the L1 layer includes a reserved area, a PCA 113, a recording management information area 114, a lead-in area 112, a data recording area 117, and a specific example of the “first calibration area” in the present invention.
- a lead-out area 118 (not shown) is provided. That is, the optical disc 100 is a parallel track path type optical disc.
- the PCAs 103 and 113 are areas used for processing for obtaining an optimum recording laser power (that is, calibration of recording laser fineness).
- PCA103 is used to determine the optimum recording laser power for the L0 layer
- PCA113 is used to determine the optimum recording laser power for the L1 layer.
- the term “optimum” here is not only literally the most suitable case but also a broad meaning including the extent to which data can be recorded appropriately. More preferably, for example, as will be described later, the influence of asymmetry does not affect the recording operation, or the reproduction error rate or reproduction jitter value of the recorded data or substantially does not affect the recording operation. Low enough! Preferably. For example, after the trial writing of the OPC pattern is completed, the trial-written OPC pattern is reproduced, and the reproduced OPC pattern is sequentially sampled to obtain the optimum recording laser power. The OPC operation will be described in detail later.
- the recording management information areas 104 and 114 include various control information for controlling the recording of data on the optical disc 100 (for example, the optimum recording laser power obtained from the disc status, recording strategy information, OPC, etc. Is recorded).
- various control information for mainly controlling data recording to the LO layer is recorded
- various control information for mainly controlling data recording to the L1 layer May be recorded.
- the reserved area is a preliminary recording area of the optical disc 100.
- a new area is created using the recording area of the reserved area. To do. Therefore, it is preferable that no data is recorded in the normally reserved area.
- a new area is created using the recording area of the reserved area excluding the recording area corresponding to the unrecorded part of PCA103. It is desirable to do. Specifically, considering that the recording area of the PCA103 used for OPC pattern recording is also assigned a relative outer peripheral force, a new force is applied from the outermost peripheral side of the reserved area in the inner peripheral direction. It is desirable to use the reserved area so as to create a safe area.
- the calculation information 120 is recorded in the lead-in area 102.
- the calculation information 120 includes ratio information such as an asymmetry value, optimum recording laser power, or modulation degree, difference information, or an absolute value, as will be described later.
- the calculated information 120 may be recorded as a recording pit or recording mark on the optical disc 100, or may be recorded as a wobble or a land pre-pit (LPP)! ,.
- calculation information 120 is not necessarily recorded in the lead-in area 102, but may be recorded in, for example, the lead-in area 112 of the L1 layer or other recording area. Ma As long as the information recording apparatus described later holds the calculation information 120, it may not be recorded on the optical disc 100.
- the head portion of the PCA 113 is located in the outer peripheral direction as compared with the head portion of the recording management information area 104.
- the size corresponding to the deviation of the head portion is, for example, the magnitude corresponding to the eccentricity of the optical disc 100 (for example, the eccentricity due to the bonding error, the eccentricity due to the deviation of the rotation center of the disc, or the eccentricity due to the disc warping). May be.
- Eccentricity is at most on the order of several tens of ⁇ m, but for example, the maximum amount of eccentricity allowed in the DVD standard is 70 m, so that each head is shifted by a size corresponding to this maximum amount. It may be configured.
- the top partial force of the PCA 113 is aligned with the top portion of the record management information area 104. It may be configured.
- the recording direction of data (for example, an OPC pattern described later) in the PCA 113 is directed to the same outer peripheral direction as the recording direction of data (for example, various control information) in the recording management information area 104. Power! In the same manner, the data recording direction in the recording management area 114 is also directed toward the outer circumferential direction. On the other hand, the data recording direction in the PCA 103 is directed to the inner circumferential direction while adding data every time a recording operation is performed.
- the OPC pattern is stored in the PCA 113 in a state where various control information is not recorded in the recording management information area 104. Can be recorded.
- the recording direction of the PCA 113 and the recording direction of the recording management information area 104 are the same, even if various control information is recorded in the recording management information area 104, the P If the OPC pattern is recorded in the CA 113, various control information is recorded in the record management information area 104, and the OPC pattern can be recorded in the PCA 113 in a state. Also, P is faster than the speed at which various control information is recorded in the record management information area 104. If the OPC pattern is recorded in the CA113 and the speed is faster, various control information is recorded in the record management information area 104, and it becomes possible to record the OPC pattern in the PCA113 in this state. .
- the OPC pattern recorded on the PCA113 varies from 1ECC block to 20ECC block.
- the size is equivalent to (approximately 2ECC blocks on average), and is generally performed when the optical disc 100 is loaded.
- the various control information recorded in the record management information area 104 is roughly equivalent to one ECC block and is only recorded at the time of ejection. Therefore, in general, various control information is recorded in the record management information area 104, and the OPC pattern is recorded in the PCA 113 rather than the speed. The speed is faster! ,. For this reason, it is generally feasible to record an OPC pattern on PC All 3 in a state where various control information is not recorded in the record management information area 104.
- FIG. 3 is a table showing conditions for recording data on the information recording medium in this embodiment.
- the recording condition 1 in the L0 layer indicates a case where data is recorded in the recording area of the L0 layer corresponding to the recording area in which no data is recorded in the L1 layer. In particular, even after data is recorded in the L0 layer (especially when reproducing the data), no data is recorded in the corresponding recording area of the L1 layer.
- Recording condition 2 in the L0 layer corresponds to the L0 layer corresponding to a recording area in which no data is recorded in the L1 layer.
- the case where data is recorded in this recording area is the same as recording condition 1 at the saddle point.
- Recording condition 2 particularly shows the case where data is recorded in the corresponding recording area of the L1 layer after the data is recorded in the LO layer (especially when the data is reproduced). This is because when data is recorded in the LO layer, data is not recorded in the corresponding L1 layer, but when data recorded in the LO layer is played back, data is recorded in the corresponding L1 layer. This is because the playback quality of the data recorded in the LO layer (for example, the asymmetry value of the playback signal) differs.
- Recording condition 3 in the LO layer indicates a case where data is recorded in the recording area of the LO layer corresponding to the recording area in which the data has been recorded in the L1 layer. In other words, the data is recorded in the LO layer after the data is recorded in the L1 layer first.
- recording condition 2 in the L1 layer indicates a case where data is recorded in the recording area of the L1 layer corresponding to the recording area in which data is already recorded in the LO layer.
- the data is recorded in the L1 layer after the data is recorded in the LO layer first.
- the recording condition 3 in the L1 layer is the same as the recording condition 4 in the case where data is recorded in the recording area of the L1 layer corresponding to the recording area in which no data is recorded in the LO layer.
- This recording condition 3 particularly indicates a case where data is recorded in the corresponding recording area of the LO layer after the data is recorded in the L1 layer (particularly when the data is reproduced).
- Recording condition 4 in the L1 layer represents a case where data is recorded in the recording area of the L1 layer corresponding to the recording area in which no data is recorded in the LO layer. In particular, even after data is recorded in the L1 layer (especially when the data is played back), no data is recorded in the corresponding LO layer recording area.
- each of the LO layer and the L1 layer has the above three recording conditions! /.
- the optimum recording laser power may be different for each recording condition.
- the optimum recording laser power required by the OPC performed in the PCA 103 described above corresponds to the optimum recording laser power corresponding to the recording condition 1 in the LO layer (that is, a specific example of “first reference power” in the present invention). To do.
- the optimum recording laser power required by OPC performed in PCA113 is the optimum for the recording condition 4 in the L1 layer.
- recording laser power that is, a specific example of “second reference power” in the present invention
- the optimum recording laser power under the recording conditions other than the recording conditions when the optimum recording laser power is obtained by OPC (that is, conditions 2 and 3 in the LO layer and conditions 2 and 3 in the L1 layer) is The calculation information 120 can be used for calculation. This calculation will be described in detail later (see Figures 8 and 9). Further, the optimum recording laser power corresponding to the recording condition 1 in the LO layer (that is, the “first reference power” in the present invention) is also the optimum recording laser power corresponding to recording condition 4 in the L1 layer (that is, the “first reference power” in the present invention).
- the optimum recording laser power can be calculated for every recording condition in the two-layer type optical disc as shown in FIG. For this reason, data can be appropriately recorded under any recording condition in a two-layer type optical disc. That is, there is an advantage that the recording quality of data can be improved, and as a result, the reproduction quality of the recorded data can be improved.
- the calculated information 120 includes the absolute value of the optimum recording laser power, it is not necessary to perform OPC or the like under all recording conditions during recording. For this reason, there is an advantage that the number of times OPC is performed can be reduced. As a result, it is possible to enjoy various benefits such as efficient use of the recording capacity of the PCA, simplification of the recording operation, improvement of the recording operation completion speed, or reduction of the processing burden on the information recording apparatus.
- the recording area in which the PCAs 103 and 113 are provided is not limited to the position shown in FIG. 2, but may be provided in the lead-in area 102, the lead-out area 108, the middle area 109, or the like. It can be installed inside or in the data recording area 107 or other areas. Further, a plurality of PCAs 103 may be provided in the LO layer, or a plurality of PCAs 113 may be provided in the L1 layer. In any case, as described above, when an OPC pattern is recorded on the PC A103, data is recorded in the recording area of the L1 layer corresponding to the PCA103 (particularly, the recording area for recording the OPC pattern). If it is not recorded, it is enough. Further, when an OPC pattern is recorded on the PCA 113, it is sufficient if no data is recorded in the recording area of the LO layer corresponding to the PCA 113 (particularly the recording area for recording the OPC pattern).
- FIG. 4 is a block diagram conceptually showing the basic structure of the information recording apparatus in the example.
- information recording apparatus 300 is an apparatus that records information on optical disc 100 and reads information recorded on optical disc 100 under the control of processor 354.
- the information recording apparatus 300 includes an optical disc 100, a spindle motor 351, an optical pickup 352, a signal recording / reproducing means 353, a CPU (drive control means) 354, a memory 355, a data input / output control means 356, an LD driver 358, an OPC pattern. It consists of generator 359 and bus 357.
- the spindle motor 351 rotates and stops the optical disc 100. Operates when accessing. More specifically, the spindle motor 351 is configured to rotate and stop the optical disc 100 at a predetermined speed while receiving spindle servo from a not-shown servo unit or the like.
- the optical pickup 352 is a specific example of the “recording unit” in the present invention, and performs recording and reproduction on the optical disk 100, and includes a laser device and a lens. More specifically, the optical pickup 352 irradiates the optical disc 100 with a light beam such as a laser beam at a first power as a read light during reproduction, and modulates with a second power as a write light at the time of recording. Irradiate.
- the signal recording / reproducing means 353 performs recording / reproduction with respect to the optical disc 100 by controlling the spindle motor 351 and the optical pickup 352.
- the CPU (drive control means) 354 is a specific example of the “control means” in the present invention, and is connected to the signal recording / reproducing means 353 and the memory 355 via the bus 357, and instructs each control means. To control the information recording apparatus 300 as a whole. Normally, software for operating the CPU 354 is stored in the memory 355.
- the memory 355 is used in general data processing in the information recording apparatus 300, such as a buffer area for recording / reproducing data and an area used as an intermediate buffer when converted into data used by the signal recording / reproducing means 353.
- the Memory 355 is composed of a ROM area where programs for operating these recorder devices are stored, a buffer used for compression / decompression of video data, and a RAM area where variables necessary for program operations are stored. Is done.
- the memory 355 includes a semiconductor memory such as ROM, RAM, flash memory, etc., and the above-described calculation information 120 may be recorded thereon.
- the calculation information 120 when the calculation information 120 is recorded on the optical disk 100, the calculation information may not be recorded in the memory 355.
- the data input / output control means 356 inputs data to be recorded on the optical disc 100 from an external device, for example. Then, the data input / output unit 356 outputs the input data to the signal recording / reproducing unit 353 via the bus 357. If the data recorded on the optical disc 100 can be reproduced, the data input / output means 356 is a liquid crystal display. For example, the reproduced data may be output to an external output device.
- the OPC pattern generator 359 is a specific example of the "calibration means" in the present invention, and a predetermined OPC as a specific example of the "pattern information" in the present invention using various strategies described later. Used to generate a pattern.
- the LD driver 358 controls the laser beam emitted from the optical pickup 352 by oscillating the laser diode or the like of the optical pickup 352 at a predetermined frequency.
- the information recording apparatus 300 also serves as an embodiment of the information recording / reproducing apparatus.
- the recorded information can be reproduced via the signal recording / reproducing means 353 (for example, a head amplifier, an RF detector, etc.). .
- FIG. 5 is a flowchart showing the flow of the entire recording operation of the information recording apparatus 300 according to the present embodiment.
- an OPC process is performed in the LO layer, specifically, in the PCA 103 (step S101).
- FIG. 6 is a schematic timing chart showing one OPC process in the case of 16 power steps
- Fig. 7 is a graph conceptually showing the correlation between optimum recording laser power and asymmetry. It is.
- an optical pickup 352 is provided in the lead-in area 102 under the control of the CPU 354.
- PCA 103 (or PCA 113 provided in lead-in area 112).
- the operation of the OPC pattern generator 359 and the LD driver 358 sequentially switches the recording laser power in stages (for example, 16 stages different from each other), and the OPC pattern is recorded in the PCA 103 or 113.
- a reference OPC pattern as shown in FIG. 6 is recorded.
- One example is a recording pattern in which short pits (marks) corresponding to 2T pulses and long pits (marks) corresponding to 8T pulses are alternately formed with no-recording sections (spaces) of the same length. .
- the LD driver 358 drives the semiconductor laser in the optical pickup 352 so that the recording laser power is sequentially switched by the OPC pattern output from the OPC pattern generator 359.
- the OPC pattern trial-written in the PCA 103 or 113 is reproduced. Specifically, the peak value and the bottom value of envelope detection of the RF signal are sampled from the RF signal input to the envelope detector (not shown). Thereafter, such an OPC pattern reproducing power is obtained in one OPC process, for example, according to the number of recorded OPC patterns, and then the optimum recording laser power is obtained. That is, from the asymmetry obtained from these peak value and bottom value, for example, an optimum recording laser power is obtained such that the jitter value representing the quality of the recording characteristics is near the minimum.
- the asymmetry value of the OPC pattern recorded for each recording laser power switched to 16 levels is sampled, and a correspondence relationship with the recording laser power is created.
- a graph as shown in FIG. 7 may be created, a function indicating the correspondence between the recording laser power and the asymmetry value, or the recording laser power and the asymmetry value may be created. It may be a table or a table showing the correspondence relationship.
- the recording laser power for realizing the target asymmetry target j8 is the optimum recording laser power to be obtained. For example, if the target j8 power is '0.02' and the recording laser power at which the asymmetry value is 0.02 "is” 18.2 mW ", the optimum recording laser power to be obtained is” 18.2 mW ". Become.
- step S101 As a result of the OPC process in step S101, as shown in FIG. The optimum recording laser power for recording condition 1 in the LO layer is required.
- step S102 the OPC process is performed in the PCA 113 (step S102).
- the operation as described above is repeated to obtain the optimum recording laser power.
- the optimum recording laser power for recording condition 4 in the L1 layer is obtained.
- the calculation information 120 is read (step S103).
- the calculation information 120 is read from the optical disc 100 if it is recorded on the optical disc 100 as shown in FIG. 2, and is read from the memory 355 if it is recorded in the memory 355 of the information recording device 300.
- calculation information 120 recorded on the optical disc 100 may be preferentially read, or alternatively, the calculation information 120 recorded in the memory 355 may be preferentially read. You may comprise. Further, for example, it may be configured to determine whether the calculated information 120 is recorded in the deviation between the optical disc 100 and the memory 355 under the control of the CPU 354! Depending on the user's selection of the recording device 300, it may be configured to preferentially read the deviation.
- step S104 based on the optimum recording laser power obtained in steps S101 and S102 and the calculation information 120 read in step S103, control of the CPU 354 as a specific example of “calculation means” in the present invention.
- the optimum recording laser power under each recording condition is calculated (step S104).
- FIG. 8 is a table specifically showing the calculation information 120 based on the asymmetry value
- FIG. 9 is a table specifically showing the calculation information 120 based on the recording laser power value.
- the calculation information 120 is configured to have an optimum recording power target under each recording condition (that is, an absolute value of an asymmetry value that realizes the optimum recording laser power). A little.
- the target ⁇ for realizing the optimum recording laser power under the recording condition 1 is “0.05”.
- the optimum recording laser power in recording condition 2 that is, a component of “first optimum power” in the present invention.
- Target j8 is “0.03”
- the target ⁇ that realizes the optimal recording laser No. 1 under the recording condition 3 is “ 0. 05 ".
- 8 for realizing the optimum recording laser power under the recording condition 2 (that is, a specific example of the “fourth optimum power” in the present invention) is “0.05”
- the target j8 for realizing the optimum recording laser power under the recording condition 3 (that is, one specific example of the “third optimum power” in the present invention) is “0.03”
- the optimum recording laser power under the recording condition 4 is The target / 3 to be realized is "0. 05".
- the PCA 103 calculates the respective optimum recording laser power in the L0 layer, and the PCA 113 calculates the respective optimum recording laser power in the L1 layer. To do. For example, when calculating (that is, obtaining) the optimum recording laser power in the recording condition 2 of the L0 layer, OPC is performed in the PCA103, and the recording laser power that gives the target j8 force '0.03 ”is recorded. The optimum recording laser power under the conditions is calculated (that is, obtained).
- the optimum recording laser power for each recording condition of the L0 layer can be obtained simultaneously by one OPC operation. Is possible.
- the calculation information 120 is read in advance prior to the OPC operation in step S102 in FIG. 5, the optimum recording laser power for each recording condition of the L1 layer can be obtained simultaneously by one OPC operation. It is. The same applies to the following aspects of the calculation information 120.
- the calculation information 120 may be configured to have a difference of the target ⁇ 8 of the optimum recording power under each recording condition. That is, the difference based on a predetermined value may be used as the calculation information 120.
- the target j8 that realizes the optimum recording laser power under the recording condition 1 is a reference value.
- the reference value of target / 3 can be calculated by the OPC operation in step S101 in FIG.
- the target j8 that achieves the optimum recording laser power under the recording condition 1 is naturally "0", and the target that realizes the optimum recording laser power under the recording condition 2
- the difference of j8 is “0.02”, and the difference of the target that achieves the optimum recording laser power under recording condition 3 is “0”.
- the target j8 value S in the recording condition ⁇ which is the reference value
- 8 under recording condition 3 is 0.05. + 0 0.05.
- ⁇ is the standard value.
- the target ⁇ difference that achieves the optimum recording laser power under the recording condition 2 is “0”
- the difference of the target j8 that realizes the optimum recording laser power under the recording condition 3 is “0.02”.
- the difference of the target j8 that achieves the optimum recording laser power in condition 4 is "0".
- the calculation information 120 may be configured to have the ratio of the target j8 of the optimum recording power under each recording condition. That is, a ratio based on a predetermined value may be used as the calculation information 120.
- the target j8 that realizes the optimum recording laser power under the recording condition 1 is a reference value.
- the ratio of target / 3 that achieves the optimum recording laser power under recording condition 1 is naturally "1", and the ratio of target
- 8 that achieves the optimum recording laser power under the recording condition 3 is “1”.
- the value of the target j8 in the recording condition 1 as the reference value is “0.05”
- the target that achieves the optimum recording laser power under the recording condition 4 is the reference value.
- the ratio of target j8 that achieves the optimum recording laser power under recording condition 2 is "1”
- the ratio of target j8 that realizes the optimum recording laser power under recording condition 3 is "0.6”
- the ratio of target ⁇ that realizes the optimum recording laser power under recording condition 4 is naturally “1”.
- the calculation information 120 may be configured to have an optimum recording power value (that is, an absolute value of recording power) under each recording condition.
- an optimum recording power value that is, an absolute value of recording power
- the specific example of FIG. 9 (a) will be described.
- the optimum recording laser power under the recording condition 1 is “14 OmW”
- the optimum recording laser power under the recording condition 2 is “13.8 mW”
- the optimum recording laser power under the recording condition 3 is “13.6 mW”.
- the optimum recording laser power under the recording condition 2 is “17.6 mW”
- the optimum recording laser power under the recording condition 3 is “17.8 mW”
- the optimum recording under the recording condition 4 is performed.
- the laser power is "18 OmW”.
- the recording laser power corresponding to each recording condition for each recording layer is set. In this case, it is not necessary to perform OPC in PCA 103 or 113, but of course OPC may be performed.
- the calculation information 120 may be configured to have a difference in optimum recording power under each recording condition. In other words, a difference based on a predetermined recording laser power value may be used as the calculation information 120.
- the optimum recording laser power under the recording condition 1 is a reference value.
- the optimum recording laser power difference under the recording condition 1 is naturally “OmW”, and the optimum recording laser power difference under the recording condition 2 is “0.2 mW”, so that the optimum recording laser power under the recording condition 3 is realized.
- the optimum recording laser power under the recording condition 4 is a reference value.
- the difference in optimum recording laser power under recording condition 2 is “0.4 mW”
- the difference in optimum recording laser power under recording condition 3 is “0.2 mW”
- the difference in optimum recording laser power under recording condition 4 is Of course, "OmW”.
- the calculation information 120 may be configured to have an optimum recording power ratio in each recording condition. That is, a predetermined recording laser power value is used as a reference The ratio may be calculated information 120.
- the optimum recording laser power under the recording condition 1 is a reference value.
- the optimum recording laser power ratio under recording condition 1 is naturally “1”
- the optimum recording laser power ratio under recording condition 2 is “0.986”
- the optimum recording laser power ratio under recording condition 3 is "0. 9 71".
- the optimum recording laser power value under the recording condition 1 as the reference value is “14 OmW”
- the optimum recording laser power under the recording condition 4 is a reference value.
- the optimum recording laser power ratio under recording condition 2 is “0. 978”
- the optimum recording laser power ratio under recording condition 3 is “0.989”
- the optimum recording laser power ratio under recording condition 4 is Naturally, the ratio of the target j8 to be realized is "1".
- the calculation information 120 As described above, as the calculation information 120, as shown in FIG. 9, information indicating an absolute value, a ratio, or a difference directly indicating the value of the optimum laser power may be used, or FIG. As shown, information indicating the absolute value, ratio, or difference of the asymmetry value indirectly indicating the value of the optimum laser power may be used. Further, in addition to or instead of these asymmetry values and optimal laser noise values, the calculation information 120 directly includes other optimal laser power values represented by, for example, modulation degree and reproduction error rate. Alternatively, it may be configured to use information indicating a ratio, a difference, an absolute value, or the like as shown indirectly.
- a ratio, a difference, or the like according to a change in the recording position on the optical disc 100 (that is, a change in the position where the optical pickup 352 irradiates the laser beam) may be recorded.
- the optimum recording laser power may change due to the difference in recording characteristics on the recording surface between the inner periphery side and the outer periphery side of the optical disc 100. Therefore, in response to the change in the optimum recording laser power due to the change in the recording position, the ratio, difference or recording laser power value included in the calculation information 120 has, for example, both the inner circumference side and the outer circumference side. You can configure it like this.
- the calculation information 120 includes the maximum of the L0 layer and the L1 layer.
- Information indicating the ratio or difference of the appropriate recording laser power may be used.
- “18 OmW”, which is the optimum recording laser power for recording condition 4 of the L1 layer shown in FIG. 9 (a) is based on “14 OmW”, which is the optimum recording power for recording condition 1 of the LO layer.
- ratio information "1.286” is indicated.
- “18 Om W”, which is the optimum recording laser power for recording condition 4 in the L1 layer shown in FIG. 9 (a) is a difference based on “14 OmW”, which is the optimum recording power for recording condition 1 in the L0 layer.
- Information is shown as "+4. OmW”.
- the information recording apparatus 300 can calculate the optimum recording laser power for every recording condition in the two-layer type optical disc as shown in FIG. For this reason, data can be appropriately recorded under any recording condition in a two-layer type optical disc. Specifically, more suitable asymmetry values, reflectances, modulation degrees, jitter values, etc. can be obtained as the characteristics of recorded data, and good recording sensitivity can be realized. That is, it is possible to receive various benefits of the optical disk 100 according to the above-described embodiment.
- the calculation information 120 is read before entering the data recording operation, but the calculation information 120 is not necessarily read at this time.
- necessary calculation information may be read to calculate the optimum recording laser power under the recording condition.
- the optimum recording laser power under each recording condition is calculated in advance before the recording operation, it is not necessary to perform the recording laser power calculation operation during the recording operation. In other words, it is sufficient to change the power of the laser beam to be oscillated by the LD driver 358. Therefore, from the viewpoint of speeding up the recording operation, it is preferable to calculate the optimum laser power in advance before the recording operation as shown in FIG.
- the memory 355 may be configured such that the calculation information 120 is recorded in advance by the manufacturer of the information recording apparatus 300, for example, at the time of manufacture, or a CD-ROM or DV D- Recording may be performed as appropriate using an optical disk such as a ROM, removable media such as an IC card, a memory stick, and an SD card. Or wired or wireless form It may be configured to record as appropriate via the selected network.
- the calculated information 120 recorded on the optical disc 100 may also be appropriately rewritten by the operation of the information recording device 300 if it is recorded in a rewritable manner. Further, the calculation information 120 recorded on the optical disc 100 may be recorded in the memory 355.
- the calculation information 120 recorded on the optical disc 100 may be recorded in the memory 355.
- the calculation information 120 is recorded in the memory 355 having a relatively high reading speed, it is necessary to calculate the optimum recording laser power. It also has the advantage that time can be reduced.
- the power of explanation is given by taking a two-layer type optical disc as an example of the optical disc 100.
- the same benefits can be obtained even in a multilayer optical disc having three or more layers. It is possible to enjoy. That is, the reference power can be calculated appropriately, and the optimum power under various recording conditions can be calculated relatively easily based on the calculation information corresponding to the recording conditions of each recording layer.
- the power described for the optical disc 100 as an example of the information recording medium and the recorder related to the optical disc 100 as an example of the information recording device is not limited to the optical disc and the recorder.
- the present invention can also be applied to other high-density recording or various information recording media compatible with high transfer rates and their recorders.
- the present invention is not limited to the above-described embodiments, but can be appropriately modified within the scope of the claims and the entire specification without departing from the gist or concept of the invention which can be read.
- An information recording medium, an information recording apparatus and method, and a computer program for recording control are also included in the technical scope of the present invention.
- the information recording medium, information recording apparatus and method, and computer program according to the present invention can be used for high-density optical discs such as DVDs, and can also be used for information recording apparatuses such as DVD recorders. . Further, the present invention can be used for an information recording device or the like that is mounted on or can be connected to various computer devices for consumer use or business use, for example.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2006535774A JPWO2006028114A1 (ja) | 2004-09-09 | 2005-09-07 | 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 |
EP05778565A EP1788561A4 (en) | 2004-09-09 | 2005-09-07 | INFORMATION RECORDING MEDIUM, INFORMATION RECORDING DEVICE AND METHOD, AND COMPUTER PROGRAM |
US11/662,093 US20080074972A1 (en) | 2004-09-09 | 2005-09-07 | Information Recording Medium, Information Recording Device and Method and Computer Program |
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JP2004262615 | 2004-09-09 | ||
JP2004-262615 | 2004-09-09 |
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WO2006028114A1 true WO2006028114A1 (ja) | 2006-03-16 |
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PCT/JP2005/016393 WO2006028114A1 (ja) | 2004-09-09 | 2005-09-07 | 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 |
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US (1) | US20080074972A1 (ja) |
EP (1) | EP1788561A4 (ja) |
JP (1) | JPWO2006028114A1 (ja) |
KR (1) | KR100869270B1 (ja) |
CN (1) | CN100530368C (ja) |
TW (1) | TWI362658B (ja) |
WO (1) | WO2006028114A1 (ja) |
Cited By (1)
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WO2011036858A1 (ja) * | 2009-09-25 | 2011-03-31 | パナソニック株式会社 | 記録媒体およびその記録再生装置 |
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JP4664425B2 (ja) * | 2009-06-05 | 2011-04-06 | 株式会社日立製作所 | 多層光ディスクの記録方法 |
JP2011008843A (ja) * | 2009-06-24 | 2011-01-13 | Hitachi Ltd | 多層光ディスクおよびその記録方法 |
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MXPA02012521A (es) * | 2000-09-13 | 2004-07-30 | Matsushita Electric Ind Co Ltd | Medio de grabacion optica de informacion, metodo de grabacion optica de informacion y aparato de grabacion optica de informacion. |
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2005
- 2005-09-07 EP EP05778565A patent/EP1788561A4/en not_active Withdrawn
- 2005-09-07 JP JP2006535774A patent/JPWO2006028114A1/ja active Pending
- 2005-09-07 KR KR1020077005817A patent/KR100869270B1/ko active IP Right Grant
- 2005-09-07 CN CNB2005800304275A patent/CN100530368C/zh active Active
- 2005-09-07 WO PCT/JP2005/016393 patent/WO2006028114A1/ja active Application Filing
- 2005-09-07 US US11/662,093 patent/US20080074972A1/en not_active Abandoned
- 2005-09-08 TW TW094130852A patent/TWI362658B/zh not_active IP Right Cessation
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US8509044B2 (en) | 2009-09-25 | 2013-08-13 | Panasonic Corporation | Recording medium and recording or reproducing apparatus therefor for recording or reproducing control information |
Also Published As
Publication number | Publication date |
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CN101015004A (zh) | 2007-08-08 |
TWI362658B (en) | 2012-04-21 |
EP1788561A4 (en) | 2008-08-20 |
TW200623066A (en) | 2006-07-01 |
EP1788561A1 (en) | 2007-05-23 |
JPWO2006028114A1 (ja) | 2008-07-31 |
CN100530368C (zh) | 2009-08-19 |
US20080074972A1 (en) | 2008-03-27 |
KR20070057174A (ko) | 2007-06-04 |
KR100869270B1 (ko) | 2008-11-18 |
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