WO2005122160A1 - Système d’enregistrement d’informations et dispositif et procédé d’enregistrement d’informations - Google Patents

Système d’enregistrement d’informations et dispositif et procédé d’enregistrement d’informations Download PDF

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Publication number
WO2005122160A1
WO2005122160A1 PCT/JP2005/010347 JP2005010347W WO2005122160A1 WO 2005122160 A1 WO2005122160 A1 WO 2005122160A1 JP 2005010347 W JP2005010347 W JP 2005010347W WO 2005122160 A1 WO2005122160 A1 WO 2005122160A1
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WO
WIPO (PCT)
Prior art keywords
recording
layer
information
area
recording layer
Prior art date
Application number
PCT/JP2005/010347
Other languages
English (en)
Japanese (ja)
Inventor
Kazuo Kuroda
Toshio Suzuki
Shoji Taniguchi
Eiji Muramatsu
Masahiro Kato
Kunihiko Horikawa
Original Assignee
Pioneer Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Pioneer Corporation filed Critical Pioneer Corporation
Publication of WO2005122160A1 publication Critical patent/WO2005122160A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • 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 the technical field of an information recording medium such as a DVD, for example, and an information recording apparatus and method such as a DVD recorder.
  • a recording layer located closest to the laser beam irradiation side referred to as an “LO layer” in the present application.
  • the information is transferred to the L1 layer by heat, etc. Irreversible change recording method or rewritable method.
  • Patent Document 1 JP 2001-52337 A
  • the present invention has been made in consideration of, for example, the above-described conventional problems. For example, it is possible to efficiently perform test writing on each of a plurality of recording layers and efficiently store recorded information. It is an object of the present invention to provide a multi-layered information recording medium capable of recording, and an information recording apparatus and method capable of efficiently recording recorded information on such an information recording medium.
  • the information recording medium of the present invention has a first recording layer for recording first information, which is at least a part of recorded information, and is laminated on the first recording layer.
  • power calibration for detecting an optimum recording power of a recording laser beam transmitted through the other layer of the second recording layer and the first recording layer, which is located on the layer side
  • the light transmittance in the facing region is changed to a value obtained when it is assumed that the first parameter is not changed and the other layer and the first recording layer are unrecorded.
  • the light transmittance is close to the light transmittance when it is assumed that the first parameter is not changed and the other layer and the first recording layer are already recorded.
  • the first recording layer and one or more second recording layers are laminated on one surface of the disc-shaped substrate,
  • the medium is a two-layer or multi-layer medium such as a DVD or an optical disk.
  • recording information such as audio, video information, or content information can be recorded.
  • recording information such as audio, video information, or content information can be recorded in each of the second recording layers.
  • the recording or reproducing laser beam is applied in the order of the substrate, the other layers of the first recording layer, the other layers of the second recording layer, and the second recording layer.
  • each layer of the second recording layer is the second layer counted from the direction in which the recording laser beam is irradiated, there is no other layer of the second recording layer.
  • each layer of the second recording layer is the third layer, there is only one other layer of the second recording layer.
  • each layer of the second recording layer is the fourth layer, there are only two other layers of the second recording layer.
  • Each layer of the second recording layer is provided with a predetermined area such as an OPC area where power calibration (calibration) for detecting the optimum recording power of the recording laser beam is performed.
  • the other layer of the second recording layer and the first recording layer are provided with a facing region facing a predetermined region.
  • the light transmittance of the other layer of the second recording layer and the facing region of the first recording layer can be reduced. It is. Therefore, by changing the first parameter, the light transmittance of the other layer of the second recording layer and the unrecorded facing area in the first recording layer is approximated to the light transmittance of the recorded facing area. It is possible to do so.
  • the information recording device described later must be used to properly detect the optimum recording power in a predetermined area of each layer of the second recording layer. Thus, it is necessary to perform a process of setting another layer through which the laser beam is transmitted and a region facing the first recording layer in a recorded state.
  • the second recording layer in the facing area can be moved to a predetermined area.
  • the light transmittance is compared with the light transmittance obtained when the first parameter is not changed and the other recording layers of the second recording layer and the first recording layer are assumed to be unrecorded. It is possible to approach the light transmittance when it is assumed that the data is not changed and that the other layers of the second recording layer and the first recording layer have been recorded. Therefore, before the OPC process is performed on each layer of the second recording layer by the information recording apparatus described later, recording for setting the other layers of the second recording layer and the first recording layer to a recorded state is performed. The operation can be omitted. As described above, it is possible to more quickly and accurately detect the value of the optimum recording power for each layer of the second recording layer.
  • the light transmittance force in the opposing region This first parameter is not changed, and it is assumed that the other layers of the second recording layer and the first recording layer are unrecorded.
  • the light transmittance is close to the light transmittance when the first parameter is not changed and the other layers of the second recording layer and the first recording layer are assumed to have been recorded.
  • a desired light transmittance should be obtained.
  • the light transmittance in the opposing region does not change the first parameter and the other parameter does not change. It is equal to the light transmittance when it is assumed that the layer and the first recording layer have been recorded!
  • the other layer and the first recording layer may have a color And a dye film disposed in the facing region, and at least one of a type, a ratio, a film thickness, and a stacking order of components included in the color film.
  • the light transmittance in the opposing area is changed by the light transmission in the case where the second parameter is not changed and the other layer and the first recording layer are assumed to be unrecorded.
  • the second parameter is not changed and the other layer and the first recording layer have been recorded.
  • the dye layer is further provided on the other layer of the second recording layer facing the predetermined region of each layer of the second recording layer and the region facing the first recording layer. ing .
  • the light transmittance of the other layers of the second recording layer and the first recording layer is indirectly changed. It is possible to reduce to. Therefore, by adjusting the components contained in the dye film, the light transmittances of the other layers of the second recording layer in the unrecorded state and the other layers of the second recording layer in the recorded state and the first recording layer are changed. It is possible to indirectly approximate the light transmittance of the light.
  • a recording operation for setting other layers of the second recording layer and the first recording layer to a recorded state can be omitted. As described above, it is possible to more quickly and accurately detect the value of the optimum recording power for each layer of the second recording layer.
  • the light transmittance in the opposing region does not change the second parameter, and the other parameter does not change.
  • the light transmittance may be equal to the light transmittance when it is assumed that the layer and the first recording layer have been recorded.
  • the dye film disposed in the facing region includes a component containing Ge (germanium), In (lanthanoid), Sb (antimony), and Te (tellurium) as the second parameter. It may be configured as such.
  • At least one of the first recording layer and the second recording layer has
  • management information recording area for recording management information, wherein the management information recording area
  • a configuration may be adopted in which second identification information for identifying whether or not the second parameter has been changed is recorded as the management information.
  • the second identification information such as a flag is read by an information recording device described later, for example, by a seek operation, so that the OPC suitable for the information recording medium is more quickly and accurately. Processing can be realized.
  • the opposing region contains Ge (germanium), In (lanthanoid), Sb (antimony), and Te (tellurium) as the first parameter. It is configured as
  • the predetermined area is an area smaller than the opposing area.
  • the predetermined area in each layer of the second recording layer where the OPC process is performed is made smaller than the other area of the opposing second recording layer and the opposing area in the first recording layer. It is possible to secure a margin for the effects of eccentricity between layers and the spread of laser light, etc., in the optical disc of the type, so that the optimum recording power value for each layer of the second recording layer can be more appropriately determined. It becomes possible to detect.
  • At least one of the first recording layer and the second recording layer further has a management information recording area for recording management information, In the management information recording area, first identification information for identifying whether or not the first parameter has been changed is recorded as the management information.
  • the first identification information such as a flag is read by the information recording device described later, for example, by a seek operation, so that the information can be read more quickly and accurately.
  • OPC processing suitable for the recording medium can be realized.
  • the power calibration for the other layer and the first recording layer is performed in an area different from the facing area.
  • the opposing region and the first predetermined region are configured to be shifted from each other in the radial direction so as not to overlap with each other. Therefore, a laser beam when trial writing is performed in a predetermined area of each layer of the second recording layer, for example, passes through another layer of the second recording layer and an opposing area or an unrecorded area provided in the first recording layer. Therefore, it does not pass through the first predetermined area. For this reason, the situation in which the test writing in the predetermined area of each layer of the second recording layer becomes inaccurate due to the influence of the state in the first predetermined area, that is, the recorded state or the unrecorded state by the test writing information, may occur. It is possible to prevent it from occurring.
  • the opposing region and the first predetermined region overlap and do not differ from each other, optical characteristics such as light transmittance change in the opposing region due to the influence of the first predetermined region.
  • the trial writing in a predetermined area performed through this becomes more or less inaccurate.
  • each layer of the second recording layer is provided in an area different from the predetermined area and not facing the opposing area.
  • Each layer has a second predetermined area in which the power calibration is performed for each layer.
  • each layer of the second recording layer performs power calibration with the recording laser beam transmitted through the other layers of the second recording layer and the unrecorded portion of the first recording layer.
  • it further has a second predetermined area. Therefore, it is possible to detect the value of the optimum recording power corresponding to the other recording layers of the second recording layer and the recording state of the first recording layer.
  • At least one of the first recording layer and the second recording layer has a management function of recording the detected optimum recording power value. It further has a region.
  • the OPC process is performed each time a recording operation is performed by the information recording device described later, or simultaneously or before or after each layer of the first recording layer and the second recording layer. Then, the value of the optimum recording power for each recording layer detected by the OPC process is recorded in the management area. Then, by reading out the value of the optimum recording power recorded in this management area, it is possible to realize more accurate and quick recording operation.
  • the value of the optimum recording power may be stored in a storage device such as a memory in the information recording device described later, instead of being recorded in the management area of the information recording medium.
  • an information recording apparatus of the present invention is an information recording apparatus for recording the recording information on the information recording medium according to claim 1, wherein By irradiating the first recording layer with a laser beam so as to condense it, test writing information, which is at least another part of the recording information, is written to the first recording layer, and the recording laser beam is applied to the first recording layer.
  • Test writing control means for controlling the writing means so as to test-write the test writing information for power calibration of the recording laser light on the layer and the first recording layer.
  • the test writing control means including, for example, a CPU (Central Processing Unit)
  • a writing unit including, for example, an optical pickup. That is, for example, at the time of manufacturing an information recording medium such as an optical disc, at least one of the type and ratio of the components constituting the facing region provided in the other layer of the second recording layer and the first recording layer.
  • the parameters it is possible to reduce the light transmittance to a predetermined area in the facing area. Therefore, by adjusting the first parameter, the light transmittance of the unrecorded facing area in the other layers of the second recording layer and the first recording layer is approximated to the light transmittance of the recorded facing area.
  • the other layers of the second recording layer and the first recording layer are already recorded.
  • the recording operation for setting the state can be omitted as appropriate. Therefore, according to the information recording apparatus of the present invention, it is possible to more quickly and accurately detect the value of the optimum recording power for each of the second recording layers.
  • an information recording method includes at least another part of the recording information for recording the recording information on the information recording medium according to claim 1.
  • An information recording method in an information recording apparatus provided with a writing unit for writing test write information wherein (I) each layer of the second recording layer in the predetermined area via the facing area The test writing information for power calibration of the recording laser light with respect to the test write information is written as a test, and (II) a first predetermined area provided in an area different from the opposing area and the other layer and the first
  • the OPC process is performed on each of the second recording layers under the control of the test writing control step.
  • FIG. 1 A schematic plan view (FIG. 1 (a)) showing a basic structure of an optical disc having a plurality of recording areas according to a first embodiment of the information recording medium of the present invention
  • FIG. 1 is a schematic cross-sectional view and a schematic conceptual diagram of a recording area structure in a radial direction corresponding to the schematic cross-sectional view (FIG. 1 (b)).
  • FIG. 2 is a partially enlarged perspective view of a recording surface of an optical disc according to a first embodiment of the information recording medium of the present invention.
  • FIG. 3 is a schematic cross-sectional view of a physical structure of an OPC area used in OPC processing of a two-layer optical disc according to a first embodiment of the information recording medium of the present invention.
  • FIG. 4 is a schematic cross-sectional view in which the physical structure of an OPC area used in OPC processing of a two-layer optical disc according to a first embodiment of the information recording medium of the present invention is enlarged.
  • FIG. 5 is a schematic sectional view of a physical structure of an OPC area used in OPC processing of a two-layer optical disc according to a comparative example.
  • FIG. 6 is a schematic cross-sectional view enlarging the physical structure of an OPC area used in OPC processing of a two-layer optical disc according to a comparative example.
  • FIG. 7 is an enlarged schematic cross-sectional view of a physical structure of an OPC area used in OPC processing of a two-layer optical disc according to a second embodiment of the information recording medium of the present invention.
  • FIG. 8 is a block diagram conceptually showing a basic configuration of an information recording / reproducing apparatus according to an embodiment of the information recording apparatus of the present invention.
  • FIG. 9 is a flowchart showing an optical disc recording operation and an OPC process of the information recording / reproducing device in the embodiment according to the information recording device of the present invention.
  • FIGS. 1 and 2 the laser light is emitted from the upper side to the lower side. Therefore, the L0 layer (first recording layer) is located on the upper side.
  • FIGS. 3 to 7 the laser light is also radiated upward with the lower force. Therefore, the L0 layer (first recording layer) is located on the lower side.
  • FIG. 1A is a schematic plan view showing a basic structure of an optical disc having a plurality of recording areas according to a first embodiment of the information recording medium of the present invention
  • FIG. 1 is a schematic sectional view of an optical disc and a schematic conceptual view of a recording area structure in a radial direction associated with the schematic view.
  • the optical disc 100 is formed on a recording surface on a disc body having a diameter of about 12 cm like the DVD, with the center hole 1 as the center.
  • a lead-in area 101, a data area 102, and a lead-out area 103 or a middle area 104 according to the example are provided.
  • the lead-in area 101 is provided with an OPC area PCAO or PCA1 for performing OPC processing.
  • a recording layer and the like are laminated on the transparent substrate 106, for example, of the optical disc 100.
  • tracks 10 such as a groove track and a land track are alternately provided in a spiral or concentric manner around the center hole 1.
  • data is divided and recorded in units of ECC blocks 11.
  • the ECC block 11 is a data management unit based on a preformat address in which recording information can be corrected for errors.
  • the present invention is not particularly limited to an optical disk having such three areas.
  • the lead-in area 101, the lead-out area 103, or the middle area 104 may have a further subdivided configuration.
  • the optical disc 100 has, for example, a transparent substrate 106 on which an example of first and second recording layers according to the present invention described later is formed. It has a structure in which the LO layer and the L1 layer are stacked.
  • FIG. 1 (b) it is determined whether the focusing position of the laser beam LB irradiated from the upper side to the lower side is adjusted to the recording layer of V and deviation. Accordingly, recording / reproduction in the L0 layer is performed or recording / reproduction in the L1 layer is performed.
  • the optical disc 100 according to the present embodiment has two layers.
  • the present invention is not limited to one side, that is, dual layer single side, but may be two layer both sides, that is, dual layer double side. Further, the present invention is not limited to the optical disk having two recording layers as described above, and may be a multilayer optical disk having three or more layers.
  • the recording / reproducing procedure in the two-layer type optical disc may be, for example, an opposite method in which the direction of the track path is reversed between the two recording layers, or, for example, the track path between the two recording layers.
  • a parallel system in which the directions are the same may be used.
  • FIG. 2 is a partially enlarged perspective view of the recording surface of the optical disc according to the first embodiment of the information recording medium of the present invention.
  • the optical disc 100 faces the disc-shaped transparent substrate 106 and has a non-phase-change type or non-heated side constituting the information recording surface.
  • a first recording layer (LO layer) 107 of a reversible change recording type is stacked, and a transflective film 108 is further stacked thereunder.
  • Groove tracks GT and land tracks LT are alternately formed on the information recording surface of the first recording layer 107 which also has a surface force.
  • the laser beam LB is irradiated onto the groove track GT via the transparent substrate 106.
  • the recording data written in the first recording layer 107 is read by irradiating the laser beam LB with the reproduction laser power which is weaker than the recording laser power.
  • the groove track GT is oscillated at a constant amplitude and a constant spatial frequency. That is, the groove track GT is wobbled, and the period of the wobbled 109 is set to a predetermined value.
  • address pits called land prepits LP indicating preformat address information are formed on the land track LT.
  • the preformat address information may be recorded in advance by modulating the groove 109 of the groove track GT by a predetermined modulation method such as frequency modulation or phase modulation.
  • a second recording layer (L1 layer) 207 is formed below the semi-transmissive reflective film 108, and a reflective film 208 is further formed below the second recording layer (L1 layer) 207.
  • the second recording layer 207 is irradiated with the laser beam LB through the transparent substrate 106, the first recording layer 107, and the semi-transmissive reflective film 108, so that the second recording layer 207 has a phase change type or a substantially similar to the first recording layer 107. Irreversible change by heating etc. It is configured to enable recording type recording and reproduction.
  • the second recording layer 207 and the reflection film 208 may be laminated on the transparent substrate 106 on which the first recording layer 107 and the transflective film 108 are formed, that is, may be formed as a film. After lamination on another substrate, that is, after forming a film, the film may be bonded to the transparent substrate 106. Note that a transparent intermediate layer 205 made of a transparent adhesive or the like is provided between the transflective film 108 and the second recording layer 207 as appropriate according to the manufacturing method.
  • recording / reproducing on the first recording layer 107 is performed according to the focusing position of the laser beam LB, that is, which recording layer is to be focused. Or recording / reproduction in the second recording layer 207 is performed.
  • FIG. 3 is a schematic cross-sectional view of the physical structure of the OPC area used in the OPC processing of the two-layer optical disc according to the first embodiment of the information recording medium of the present invention.
  • FIG. 4 is a schematic cross-sectional view in which the physical structure of the OPC area used in the OPC processing of the dual-layer optical disc according to the first embodiment of the information recording medium of the present invention is enlarged.
  • the optical disc 100 has two recording layers, that is, an L0 layer (that is, a recording layer corresponding to the first recording layer 107 in FIGS. 1 and 2) and an L1 layer ( That is, a recording layer corresponding to the second recording layer 207 in FIGS. 1 and 2).
  • an L0 layer that is, a recording layer corresponding to the first recording layer 107 in FIGS. 1 and 2
  • L1 layer That is, a recording layer corresponding to the second recording layer 207 in FIGS. 1 and 2
  • the recording laser light LB is emitted from the lower side to the upper side, as opposed to FIGS. 1 and 2.
  • the L0 layer is an example of the “facing region” according to the present invention, for example, in the lead-in area.
  • a transparent area TA in which at least one of the type and ratio of the components contained in the recording layer is changed, and TA0-2 in an unrecorded state are provided.
  • an OPC area PCA1 is provided in the lead-in area.
  • the OPC area PCA1 is further provided with OPC areas PCA1-1 and PCA1-2, which constitute an example of the "predetermined area” according to the present invention.
  • the OPC area PCA1 is an area used for detection of optimum recording power (ie, calibration of recording laser power), that is, so-called OPC processing.
  • the OPC area PCA1 is used for detecting the optimum recording laser power of the L1 layer. More specifically, after the test writing of the OPC pattern is completed, the test-written OPC pattern is reproduced, and the reproduced OPC pattern is sampled sequentially to detect the optimum recording power.
  • the value of the optimum recording power obtained by the OPC process may be stored in a storage device such as a memory, which will be described later, provided on the information recording device side, or a management information recording area in the information recording medium. Or OPC processing may be performed each time a recording operation is performed.
  • the laser beam LB for the OPC process is applied to the LO layer and the L1 layer by the optical pickup of the information recording / reproducing apparatus, which will be described later, from the side of the substrate (not shown), that is, the lower part of FIG.
  • the lateral force is emitted upward, the focal length and the like thereof are controlled, and the moving distance and direction of the optical disc 100 in the radial direction are controlled.
  • the recording layer of the transmission area TA of the LO layer is The light transmittance of the LO layer can be reduced by changing at least one of the type and the ratio of the contained components. Therefore, by adjusting the components contained in the recording layer, the light transmittance of the unrecorded LO layer can be approximated to the light transmittance of the recorded LO layer.
  • the value of the optimum recording power for the L1 layer corresponding to the case where the LO layer is unrecorded is that the recording laser beam LB is transmitted through the transmission area TAO-2 where the LO layer is unrecorded. It can be detected by irradiating the OPC area PCA1-2.
  • the L1 layer 207 and the reflective film 208 are laminated on the transparent substrate 106 on which the L0 layer 107, the transflective film 108, and the like are formed, that is, the film is formed.
  • the film may be laminated on another substrate, that is, after a film is formed, and then attached to the transparent substrate 106.
  • FIG. 5 is a schematic cross-sectional view of a physical structure of an OPC area used in the OPC processing of the two-layer optical disc according to the comparative example.
  • FIG. 6 is a schematic cross-sectional view in which the physical structure of the OPC area used in the OPC processing of the two-layer optical disc according to the comparative example is enlarged.
  • the L0 layer has, for example, a transparent area TA0-1 in a recorded state and a transparent area in an unrecorded state in a read-in area.
  • Area TA0-2 is provided!
  • an OPC area PCA1 is provided in the lead-in area, for example, as in the first embodiment described above.
  • the transmission area TA0-1 of the L0 layer facing the OPC area PCA1-1 of the L1 layer has been recorded and has not been recorded. Since the light transmittance in the L0 layer is different depending on the case, the optimum recording power is necessarily different. Therefore, in order to properly detect the optimum recording power in the OPC area PCA1-1 of the L1 layer, the information recording device described later records the transmission area TA0-1 of the L0 layer through which the laser beam is transmitted. Is required.
  • the types and ratios of the components contained in the L0 layer of the transmission area TA By changing at least one of the above, the light transmittance of the L0 layer can be reduced. Therefore, by adjusting the components contained in the L0 layer, it is possible to approximate the light transmittance of the unrecorded L0 layer to the light transmittance of the recorded L0 layer. Therefore, it is possible for the information recording device to omit a recording operation for setting the L0 layer to a recorded state before performing the OPC process on the L1 layer. From the above, L1 layer more quickly and accurately Can be detected.
  • FIG. 7 is a schematic cross-sectional view in which the physical structure of the OPC area used in the OPC processing of the two-layer type optical disc according to the second embodiment of the information recording medium of the present invention is enlarged.
  • the dye film 107a is It is provided on the side to be illuminated (below the LO layer 107 in FIG. 7).
  • the dye film 107a By changing at least one of the type and the ratio of the components contained in the dye film 107a, it is possible to indirectly lower the light transmittance of the LO layer. Therefore, by adjusting the components contained in the dye film 107a, it is possible to indirectly approximate the light transmittance of the unrecorded L0 layer to the light transmittance of the recorded L0 layer.
  • the value of the optimum recording power for the L1 layer corresponding to the case where the LO layer has not been recorded can be detected in the same manner as in the first embodiment.
  • this embodiment is an example in which the information recording apparatus according to the present invention is applied to an information recording / reproducing apparatus for an optical disc.
  • FIG. 8 shows an embodiment of the information recording apparatus of the present invention. It is a block diagram which shows notionally the basic structure of such an information recording / reproducing apparatus.
  • the information recording / reproducing apparatus 300 includes a spindle motor 301, an optical pickup 310, a head amplifier 311, an RF detector 312, a servo circuit 315, an LD driver 320, Cobble detector 325, LPP data detector 326, envelope detector 330, OPC pattern generator 340, timing generator 345, data collector 350, nofa 360, DVD modulator 370, data ECC generator 380, nofa 385, interface 390 and a CPU (Central Processing Unit) 400.
  • a spindle motor 301 the information recording / reproducing apparatus 300
  • an optical pickup 310 includes a head amplifier 311, an RF detector 312, a servo circuit 315, an LD driver 320, Cobble detector 325, LPP data detector 326, envelope detector 330, OPC pattern generator 340, timing generator 345, data collector 350, nofa 360, DVD modulator 370, data ECC generator 380, nofa 385, interface 390 and a CPU (Central Processing Unit) 400.
  • the spindle motor 301 is configured to rotate the optical disc 100 at a predetermined speed while receiving spindle servo from the servo circuit 315 or the like.
  • the optical pickup 310 performs recording or reproduction on the optical disk 100, and also includes a semiconductor laser device, various lenses, an actuator, and the like. More specifically, the optical pickup 310 irradiates the optical disc 100 with laser light as read light at the first power at the time of reproduction, and irradiates the light at the second power with modulation at the second power at the time of recording.
  • the optical pickup 310 is configured to be movable in a radial direction or the like of the optical disc 100 by an actuator, a slider, or the like (not shown) driven by the servo circuit 315.
  • Head amplifier 311 amplifies the output signal of optical pickup 310 (that is, the reflected light of laser beam LB) and outputs the amplified signal. Specifically, an RF signal as a read signal is output to the RF detector 312 and the envelope detector 330, and a push-pull signal is output to the towable detector 325 and the LPP data detector 326.
  • the RF detector 312 is configured to detect the RF signal and perform demodulation or the like, so that reproduced data can be output to the outside via the buffer 385 and the interface 390. Then, predetermined content is reproduced and output on an external output device (for example, a display device such as a liquid crystal display or a plasma display, or a speaker) connected to the interface 390.
  • an external output device for example, a display device such as a liquid crystal display or a plasma display, or a speaker
  • the servo circuit 315 moves the objective lens of the optical pickup 310 based on a tracking error signal, a focus error signal, and the like obtained by processing the light reception result of the optical pickup 310, thereby performing tracking control and focus control.
  • Various servo processing such as Execute.
  • the spindle motor 301 is configured to perform servo control based on a wobble signal that can also obtain the vibration of the grooved groove on the optical disc 100.
  • the LD driver 320 drives a semiconductor laser provided in the optical pickup 310 so that an optimum recording power can be determined by OPC pattern recording and reproduction processing described later during OPC processing described later. Thereafter, at the time of data recording, the LD driver 320 is configured to drive the semiconductor laser of the optical pickup 310 at the optimum recording power determined by the OPC process. During this data recording, the optimum recording power is modulated according to the recording data.
  • the wobble detector 325 is a push-pull signal indicating a wobble signal based on an output signal corresponding to the amount of light received from a head amplifier 311 serving as a detector for receiving a reflected light beam provided in the optical pickup 310. Is detected and output to the timing generator 345.
  • the LPP data detector 326 generates a push-pull signal indicating an LPP signal based on an output signal corresponding to the amount of light received from a head amplifier 311 serving as a detector for receiving a reflected light beam provided in the optical pickup 310. , And for example, as described later, the preformat address information can be detected. The pre-format address information can be output to the timing generator 345.
  • the envelope detector 330 determines the optimum recording power under the control of the CPU 400 during the reproduction of the OPC pattern in the OPC process, and determines the peak value of the envelope detection of the RF signal as the output signal from the head amplifier 311. And a bottom value.
  • the envelope detector 330 may be configured to include, for example, an A / D (Analog / Digital) converter.
  • the OPC pattern generator 340 transmits a signal indicating the OPC pattern to the LD driver 320 based on the timing signal from the timing generator 345 at the time of recording the OPC pattern in the OPC processing before the recording operation. Configured to output! RU [0100]
  • the timing generator 345 based on the preformat address information input from the LPP data detector 326, records the management unit of the preformat address information (for example, ADIP word) at the time of recording the OPC pattern in the OPC process. Detects absolute position information as a reference.
  • a slot unit smaller than the management unit of the preformat address information (for example, a slot unit corresponding to a natural number times one cycle of the wobble signal) is used. Detects relative position information as a reference. Therefore, the timing generator 345 must specify the recording start position in the OPC process irrespective of the management unit of the preformat address information, that is, whether or not the force starts from the boundary of each ADIP word. Thereafter, a timing signal for writing an OPC pattern is generated and output based on the cycle of the push-pull signal indicating the cobble signal output from the cobble detector 325.
  • the timing generator 345 can specify the reproduction start position at the time of reproducing the OPC pattern in the OPC processing in the same manner as at the time of recording. Based on the period of the push-pull signal indicating the signal, a timing signal for sampling the reproduced OPC pattern is generated and output.
  • the data collector 350 is mainly a general memory. For example, it is composed of an external RAM or the like.
  • the envelope detected by the envelope detector 330 is stored in the data collector 350, and based on this, the detection of the optimum recording power in the CPU 400, that is, the OPC process is executed.
  • the buffer 360 stores the recording data modulated by the DVD modulator 370, and can output the recording data to the LD driver 320.
  • the DVD modulator 370 is configured to perform DVD modulation on recorded data and output the modulated data to the buffer 360.
  • DVD modulation for example, 8Z16 modulation may be performed.
  • Data ECC generator 380 adds an error correction code to recording data input from interface 390. Specifically, an ECC code is added for each predetermined block unit (for example, ECC cluster unit) and output to the DVD modulator 370.
  • predetermined block unit for example, ECC cluster unit
  • the buffer 385 stores the reproduction data output from the RF detector 312, and
  • the interface 390 receives an input of recording data or the like from an external input device and outputs the data to the data ECC generator 380.
  • the reproduction data output from the RF detector 312 can be output to an external output device such as a speaker or a display.
  • the CPU 400 instructs each means such as the LD driver 320 and the servo circuit 315 to detect the optimum recording power, that is, outputs a system command, so that the entire information recording / reproducing apparatus 300 is Perform control.
  • software for operating the CPU 400 is stored in an internal or external memory.
  • test writing control means including the above-described CPU 400, envelope detector 330, OPC pattern generator 340, timing generator 345, LD driver 320, etc. Make up.
  • the information recording / reproducing apparatus 300 shown in FIG. 8 can generally record data by the optical pickup 310, the LD driver 320, the notifier 360, the DVD modulator 370, the data ECC generator 380, and other components. Needless to say, it functions as an information recording device, and generally also functions as an information reproducing device capable of reproducing data with the optical pickup 310, the head amplifier 311, the RF detector 312, and other components.
  • FIG. 9 is a flowchart showing the recording operation of the optical disc and the OPC process of the information recording / reproducing apparatus in the embodiment according to the information recording apparatus of the present invention.
  • Step S101 when the optical disc 100 is loaded, a seek operation is performed by the optical pickup 352 under the control of the CPU 354, and various management information necessary for the recording process on the optical disc 100 is obtained. . Based on this management information, under the control of the CPU 354, for example, in response to an instruction from an external input device or the like, it is determined whether or not the ability to start the data recording operation of the optical disc 100 via the data input / output control unit 306. (Step S101).
  • Step S101 when the data recording operation of the optical disc 100 is started (Step S101: Yes), it is further determined whether or not the recording layers to be recorded are the L0 layer and the L1 layer (Step S102). .
  • the recording layers to be recorded are the LO layer and the LI layer (step S102: Yes)
  • the address information in the OPC area where the OPC processing of the L0 layer and the L1 layer is performed is specified (step S102).
  • Step S 103 the address information in the OPC area where the OPC processing of the L0
  • step S104 it is determined whether at least one of the type and the ratio of the components constituting the L0 layer has been changed. Is performed (step S104).
  • the OPC The OPC process is performed on the area PCA0, and the OPC process is performed on the OPC area PCA1-1 in the L1 layer by the laser beam LB transmitted through the transmission area TA (step S106).
  • the information recording apparatus when the information recording apparatus performs the OPC process on the OPC area PCA11 of the L1 layer, a pre-recording operation in the transmission area TA of the L0 layer is performed. Can be omitted, so that the value of the optimum recording power for the L1 layer can be detected more quickly and accurately.
  • step S104 if at least one of the types and ratios of the components constituting the L0 layer is not changed (step S104: No), the transmission area TA0 of the LO layer In —2, a recording operation is performed (step S105), a recorded state is formed, and the process proceeds to step S106 described above.
  • step S107 data is recorded on the L0 layer and the L1 layer using the optimum recording power detected in the OPC processing in step S106 (step S107).
  • step S102 determines whether or not the force is applied.
  • step S108 determines whether or not the force is applied.
  • step S109 the address information in the OPC area PCA0 where the OPC processing of the L0 layer is performed is specified (step S109).
  • step S111 the data for the L0 layer is calculated using the optimum recording power calculated in step S110.
  • the data is recorded (step S111).
  • step S108 when the recording layer to be recorded is not only the LO layer, and when the recording layer to be recorded is only L1 layer (step S108: No), The address information in the OPC area where the PC processing is performed is specified (Step S112).
  • step S113 it is determined whether or not at least one of the type and the ratio of the components constituting the LO layer is changed in the transmission area TA of the LO layer facing the OPC area of the L1 layer (step S113). ).
  • the OPC process is performed on the L1 layer. (Step S115).
  • step S113 if at least one of the types and ratios of the components constituting the LO layer is changed in the transmission area of the LO layer (step S113: No), the transmission area of the LO layer may be changed. Then, a recording operation is performed (step S114), a recorded state is formed, and the process proceeds to step S115 described above.
  • step S115 data is recorded on the L1 layer using the optimum recording laser power calculated in step S115 (step S116).
  • Step S117 it is determined whether or not the force for ending the data recording operation is present.
  • Step S117 Yes
  • a series of recording operations by the information recording device is completed.
  • step S117: No it is determined whether or not the recording layers to be recorded are the L0 layer and the L1 layer (step S102).
  • step S101 when the data recording operation of the optical disc 100 is not started (step S101: No), for example, an instruction such as a recording operation start command is waited.
  • the information recording medium for example, a dual-layer DVD-R or D
  • the write-once or rewritable optical disk such as VD-RZW and the information recording / reproducing apparatus of the optical disk have been described as an example of the information recording apparatus.
  • the present invention can be applied to a multi-layer optical disk such as a three-layer type or a four-layer type, and an information recording / reproducing apparatus for the optical disk.
  • the present invention can be applied to a large-capacity recording medium such as a Blu-ray disc and an information recording / reproducing apparatus of the recording medium.
  • the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit or idea of the readable invention.
  • the medium, the information recording device and the method are also included in the technical scope of the present invention.
  • the information recording medium, the information recording device, and the method according to the present invention can be used for, for example, a high-density optical disk such as a DVD and a CD, and can be used for an information recording device such as a DVD recorder.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
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Abstract

Le système d’enregistrement d’informations faisant l’objet de cette invention est muni d’une première couche d’enregistrement (C0) afin d’enregistrer les premières informations, ainsi que d’une pluralité de deuxièmes couches d’enregistrement (C1, etc.) superposées sur la première couche d’enregistrement afin d’enregistrer respectivement les informations secondaires. Chaque couche, comptant parmi les deuxièmes couches d’enregistrement, est munie d’une zone réglementaire (ZR1-1) consacrée à la réalisation de calibrages de puissance pour détecter la puissance d’enregistrement optimale d’un rayon laser enregistreur ayant pénétré les autres couches, parmi les deuxièmes couches d’enregistrement, plus proches de la partie latérale de la première couche d’enregistrement que de la couche elle-même, ainsi que la première couche d’enregistrement. Dans une zone opposée (ZT) à la zone réglementaire des autres couches et de la première couche d’enregistrement, en modifiant un premier paramètre constituant cette zone opposée, la transmission lumineuse de la zone opposée peut ainsi se trouver plus près de la transmission lumineuse, en supposant que le premier paramètre n’a pas été modifié et que l’enregistrement a été opéré sur les autres couches et la première couche d’enregistrement, en comparaison avec le cas où le premier paramètre n’a pas été modifié et que l’enregistrement n’a pas été effectué sur les autres couches et sur la première couche d’enregistrement.
PCT/JP2005/010347 2004-06-10 2005-06-06 Système d’enregistrement d’informations et dispositif et procédé d’enregistrement d’informations WO2005122160A1 (fr)

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JP2004172526 2004-06-10

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003022532A (ja) * 2001-07-06 2003-01-24 Columbia Music Entertainment Inc 光情報記録媒体ならびにその記録方法および情報記録装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003022532A (ja) * 2001-07-06 2003-01-24 Columbia Music Entertainment Inc 光情報記録媒体ならびにその記録方法および情報記録装置

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