WO2010038333A1 - 光ディスク、光ディスク記録再生装置および情報記録再生方法 - Google Patents
光ディスク、光ディスク記録再生装置および情報記録再生方法 Download PDFInfo
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- WO2010038333A1 WO2010038333A1 PCT/JP2009/002067 JP2009002067W WO2010038333A1 WO 2010038333 A1 WO2010038333 A1 WO 2010038333A1 JP 2009002067 W JP2009002067 W JP 2009002067W WO 2010038333 A1 WO2010038333 A1 WO 2010038333A1
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- 230000003287 optical effect Effects 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000015654 memory Effects 0.000 claims description 31
- 238000003860 storage Methods 0.000 claims description 27
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 176
- 238000010586 diagram Methods 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000001186 cumulative effect Effects 0.000 description 3
- 101000685663 Homo sapiens Sodium/nucleoside cotransporter 1 Proteins 0.000 description 2
- 102100023116 Sodium/nucleoside cotransporter 1 Human genes 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
- G11B2020/122—Burst cutting area [BCA]
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
- G11B2020/1227—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc one layer of multilayer disc
-
- 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
- the present invention relates to an optical disc, an optical disc recording / reproducing apparatus, and an information recording / reproducing method for recording information at a plurality of types of data recording densities.
- Patent Document 1 discloses a configuration in which the optical system (numerical aperture, NA) is switched according to the type of the disk, and the characteristics of the signal processing system are changed in conjunction therewith. Yes.
- Patent Document 2 when one disc has a plurality of recording layers recorded in different formats, the format information of the plurality of recording layers is recorded in the lead-in area in order to recognize the format of each recording layer. A structure is disclosed.
- the lead-in area and BCA shown in Patent Document 2 are created at the time of disc manufacture and cannot be recorded after manufacture.
- An object of the present invention is to provide an optical disc, an optical disc recording / reproducing apparatus, and an information recording / reproducing method capable of easily reading out disc management information without error in a disc recorded at a plurality of types of data recording densities.
- the present invention relates to a data recording area for recording information in an optical disk for recording information at a predetermined recording density, and a management information recording area for recording disk management information including information on the data recording density in the data recording area
- disc management information is recorded in a specific format independent of the data recording density of the data recording area.
- the present invention relates to an optical disc capable of recording information at a plurality of recording densities, divided into the same plane, and a plurality of data recording areas for recording information at different data recording densities, and a plurality of data recording areas Management information recording area for recording disc management information including information on each data recording density and boundary position of each data recording area, and the management information recording area includes data of each of the plurality of data recording areas.
- Disc management information is recorded in a specific format independent of the recording density.
- the present invention relates to an optical disc having a plurality of recording layers and capable of recording information at a plurality of recording densities, a plurality of data recording areas for recording information at different data recording densities for each recording layer, and data of each recording layer It has a management information recording area for recording disc management information including information on each data recording density in the recording area, and the management information recording area is specified not depending on the data recording density of each of the plurality of data recording areas. Record the disc management information in the format.
- the present invention relates to an optical disc having a plurality of recording layers and capable of recording information at a plurality of recording densities, a plurality of data recording areas for recording information at different data recording densities for each recording layer, and a plurality of data recording areas
- a management information recording area for recording disc management information including each data recording density in the data recording area, the data recording density being a standard density among the plurality of data recording areas
- the disk management information is recorded in the format of the data recording density of the area.
- the present invention relates to an optical disc recording / reproducing apparatus for recording or reproducing information in a data recording area of an optical disc, wherein the management information recording area of the optical disc has a data recording area in a specific format independent of the data recording density of the data recording area.
- Disc management information including data recording density information is recorded.
- the spindle motor that rotates the optical disc and the disc management information are read from the management information recording region of the optical disc, and the information is stored in the data recording region of the optical disc.
- a recording density judgment circuit for judging, and a recording / reproducing process. Parts selects the recording and reproduction processing conditions set in accordance with the data recording density is determined by the recording density decision circuit.
- the present invention relates to an information recording / reproducing method for recording or reproducing information in a data recording area of an optical disc, wherein the management information recording area of the optical disc has a data recording area in a specific format independent of the data recording density of the data recording area.
- Disc management information including data recording density information is recorded, setting a reproduction condition for reproducing the disc management information according to a specific format, and reading the disc management information from the management information recording area of the optical disc.
- the step of determining the data recording density of the target data recording area from the read disc management information, the step of selecting and setting the recording / playback processing condition according to the determined data recording density, and the set recording / playback processing condition To record or play back information in the target data recording area. And a flop.
- the present invention it is possible to easily read the disc management information from an optical disc recorded with a plurality of types of data recording densities without error.
- disc discrimination processing can be performed even with a conventional apparatus that supports only a standard recording density disc, and convenience for the user is improved.
- FIG. 3 is a diagram illustrating an example of a recording layout of an optical disc (type A, type B) in the first embodiment.
- FIG. 3 is a diagram illustrating a notation example of disk management information in the disk according to the first embodiment.
- 1 is a diagram illustrating a configuration example of an optical disc recording / reproducing apparatus in Embodiment 1.
- FIG. 5 is a diagram illustrating another configuration example of the optical disc recording / reproducing apparatus according to the first embodiment. 5 is a flowchart illustrating a recording / playback processing procedure according to the first embodiment.
- FIG. 6 is a diagram showing an example of a recording layout of an optical disc (type C) in Embodiment 2.
- FIG. 1 is a diagram illustrating a configuration example of an optical disc recording / reproducing apparatus in Embodiment 1.
- FIG. 10 is a diagram illustrating a notation example of disk management information in the disk according to the second embodiment.
- FIG. 6 is a diagram illustrating a configuration example of an optical disc recording / reproducing apparatus according to a second embodiment. The figure which shows the address determination method by the number of tracking crossings.
- 9 is a flowchart illustrating a recording / playback processing procedure according to the second embodiment.
- FIG. 10 is a diagram showing an example of a recording layout of an optical disc (type D) in Embodiment 3.
- FIG. 10 is a diagram illustrating a notation example of disk management information in the disk of the third embodiment.
- FIG. 10 is a diagram illustrating a configuration example of an optical disc recording / reproducing apparatus according to a third embodiment.
- 10 is a flowchart illustrating a recording / playback processing procedure according to the third embodiment.
- 10 is a diagram illustrating an example of a recording layout of an optical disc (type E) in Embodiment 4.
- FIG. 10 is a diagram showing another example (type E ′) of the recording layout of the optical disc in the fourth embodiment.
- 10 is a flowchart illustrating a recording / playback processing procedure according to the fourth embodiment.
- the data recording density of all layers is a standard density (25 GB / layer) disc (hereinafter referred to as type A), or all layers are high density (33 GB / layer).
- Discs (hereinafter referred to as type B) are targeted.
- the number of layers for example, a 25 GB / layer ⁇ 4 layer configuration and a 33 GB / layer ⁇ 3 layer configuration are used, and both have a capacity of 100 GB as a whole. A method of discriminating between type A and type B discs and a processing method of the recording / reproducing apparatus for this will be described.
- Table 1 shows a comparison of the main specifications of the recording formats for Type A and Type B discs.
- the track pitch 0.32 ⁇ m.
- both have the same modulation rule of the recording information signal and the disk format such as wobble synchronized with the data on the disk, addressing, and the same, the channel clock frequency and the wobble frequency are different.
- FIG. 1 is a diagram showing an example of a recording layout of an optical disc (type A, type B).
- the type A and type B discs are provided with a BCA (Burst Cutting Area) area 101, a PIC (Permanent Information & Control data) area 102, and data recording areas 103 and 104 from the inner circumference side of the disk.
- BCA Band Cutting Area
- PIC Personal Information & Control data
- data recording areas 103 and 104 from the inner circumference side of the disk.
- the BCA area 101 information is described by barcodes having a width of 4 to 17 ⁇ m at intervals of 28.6 ⁇ m on the center side of the disc, and the recording density is independent of the recording density of the data recording area.
- These are recorded by burning off the reflective film with a powerful infrared laser called a YAG laser after manufacturing the disk.
- the PIC area 102 is a management information area in the BD, and is formed of a high frequency groove (HFM groove) defined by an integral multiple of the channel clock. Since data information such as pits and marks according to the disc format is not recorded in the HFM groove area, the groove frequency can be set independently of the recording density of the data area. These are formed in the same manner as wobbles (grooves) in the data area by a stamper or the like at the time of manufacturing the disc, and describe, for example, a laser power value required for recording / reproduction, which is predetermined at the time of manufacturing the disc.
- Information (data) is recorded in the data recording areas 103 and 104 at recording densities of 25 GB / layer and 33 GB / layer, respectively.
- disc management information such as the data recording density of the data recording areas 103 and 104 is further recorded in the BCA area 101 or the PIC area 102 when the disk is manufactured.
- the disk management information is recorded at a specific recording density according to this format. In other words, the recording density describing the disc management information does not depend on the data recording density of the data recording areas 103 and 104 in the disc.
- FIG. 2 is a diagram showing a notation example of disc management information (data recording density information) on type A and type B discs. It is an example of bit arrangement when describing density information.
- the recording density 25 GB / layer (type A) is defined as “0000” bits
- the recording density 33 GB / layer (type B) is defined as “0001” bits. By identifying this bit value, the recording density of the disc can be determined.
- FIG. 3 is a diagram showing a configuration example of the optical disc recording / reproducing apparatus in the present embodiment.
- Reference numeral 1 denotes an optical disc (BD shown in FIG. 1)
- 2 denotes a spindle motor for rotating the optical disc
- 25 denotes an optical head.
- the optical head 25 irradiates the optical disc 1 with laser light (blue laser having a wavelength of about 405 nm) to read disc management information, and records / reproduces information on the data recording areas 103 and 104 of the optical disc 1.
- laser light blue laser having a wavelength of about 405 nm
- the density determination circuit 35, the first and second reproduction signal processing circuits 9, 10, the first and second wobble signal processing circuits 14, 15, the first and second The strategy storage memories 30 and 31 are provided.
- the microcomputer 32 controls reading of disk management information, setting of a recording / reproducing processing circuit, execution of a recording / reproducing operation, and the like.
- the disk management information is read from the BCA area 101 or PIC area 102 of the optical disk, and the density determination circuit 35 determines the density information (25 GB / layer or 33 GB / layer) of the target disk. According to the determination result, the first and second reproduction signal processing circuits 9 and 10 are switched, and the reproduction signal is demodulated by the demodulation circuit 12. Further, the first and second wobble signal processing circuits 14 and 15 are switched, and the address generation circuit 17 reproduces the recording / reproducing address.
- the recording strategy generation circuit 27 generates a recording signal by switching the first and second strategy storage memories 30 and 31.
- the reproduction equalizer is set according to the shortest mark length and the clock frequency.
- the wobble signal processing circuits 14 and 15 are switched, the address reproduction is set according to the wobble frequency, and the strategy storage memory 30 is set. , 31, the recording strategy is set in accordance with the clock frequency.
- FIG. 4 is a diagram showing another configuration example of the optical disc recording / reproducing apparatus.
- a rotation control circuit 40 for controlling the rotation of the spindle motor 2 and first and second rotation control coefficient storage memories 42 and 43 are provided, and the first and second rotation control circuits in FIG.
- the wobble signal processing circuits 14 and 15 are deleted.
- the density determination circuit 35 determines density information (25 GB / layer or 33 GB / layer) of the target disk, and switches the rotation control coefficient storage memories 42 and 43. As a result, the number of revolutions of the disc can be changed according to the density, and the reproduced wobble frequency can be made constant.
- FIG. 5 is a flowchart showing the procedure of the recording / reproducing process of this embodiment.
- the disc is inserted into the optical disc apparatus.
- the disc is 25 GB / layer (type A) or 33 GB / layer (type B).
- a playback condition for reading disc management information (data recording density information) from the disc is set. That is, the reproduction condition according to the format of the BCA area 101 or the PIC area 102 is set.
- the optical head is moved to the management information recording area (BCA area or PIC area) on the disk.
- the disc management information is read from the management information recording area.
- step S305 it is determined from the read recording density information whether the disc is 25 GB / layer (type A) or 33 GB / layer (type B).
- the process proceeds to S306, and the recording / playback processing conditions (playback signal processing circuit, wobble signal processing circuit, recording strategy) for 25 GB / layer are set.
- the recording / reproduction processing conditions for 33 GB / layer are set.
- the host waits for an information recording or reproduction instruction command from the host.
- the disc management information is recorded in a specific format in the BCA area or PIC area, the reproduction condition of the management information is uniquely determined. Therefore, even if a disc having any recording density is inserted, it is possible to easily determine the recording density of the disc without error and perform a recording / reproducing operation corresponding to the disc.
- a disk having a standard density (25 GB / layer) area and a high density (33 GB / layer) area in the same plane (in the same layer) as data recording density (hereinafter referred to as type C).
- type C data recording density
- the number of layers is a single layer, but other layers may be used.
- Type C discs can be recorded and reproduced by either a conventional device compatible with standard density (25 GB / layer) or a high-density compatible device compatible with high density (33 GB / layer).
- FIG. 6 is a diagram showing an example of the recording format of the optical disc (type C).
- a type C disc has a BCA area 111, a PIC area 112, a first recording density area (25 GB / layer) 113, and a second recording density area (33 GB / layer) 114 in this order from the inner periphery in the same plane.
- Reference numeral 115 denotes a boundary between the first recording density area 113 and the second recording density area 114.
- the boundary portion 115 may have an unrecorded portion (gap region) having a predetermined width in the radial direction.
- Disc management information (data recording density information) is recorded in the BCA area 111 or the PIC area 112. Since the BCA area 111 and the PIC area 112 have a specific format, the disc management information is recorded at a specific recording density. In other words, the recording density of the disc management information does not depend on the data recording density of the data recording areas 113 and 114 in the disc.
- FIG. 8 is a diagram showing a configuration example of the optical disc recording / reproducing apparatus in the present embodiment.
- the density information storage memory 50, the address determination circuit 51, and the tracking crossing number (TES) count circuit 52 are provided in the configuration of FIG.
- the density information and boundary address information read from the type C disk are stored in the density information storage memory 50, and these are referred to by the address determination circuit 51.
- the address determination circuit 51 receives the current address information from the address generation circuit 17 and determines the density (25 GB / layer or 33 GB / layer) of the target area. Based on the determination result, switching of the first and second reproduction signal processing circuits 9 and 10, switching of the first and second wobble signal processing circuits 14 and 15, and first and second strategy storage memories 30, 31 are performed. Switch. Also, the number of track crossings up to the target area (target address) is calculated, and the TES count circuit 52 counts the number of tracks to perform a seek operation to the target area.
- FIG. 9 is a diagram showing an address determination method based on the number of tracking crossings.
- the horizontal axis represents the address value (radius position), and the vertical axis represents the cumulative number of track crossings (TES) by the TES count circuit 52.
- the section 201 is a 25 GB / layer area
- the section 202 is a 33 GB / layer area
- the boundary address is “1000000h”.
- the TES number cumulative CNT1 when the boundary address is “1000000h” is calculated, and the TES count circuit 52 counts up to CNT1 to seek to the boundary address.
- the target area (address) can be reached by counting the number of tracking crossings from the boundary.
- FIG. 10 is a flowchart showing the procedure of the recording / reproducing process of this embodiment.
- (A) is a step at the time of disk loading, and
- (b) is a step at the time of recording / reproducing processing.
- the disc is inserted into the optical disc apparatus.
- the disk is a disk (type C) in which a standard density (25 GB / layer) area and a high density (33 GB / layer) area are mixed in the same plane.
- a playback condition for reading the disc management information (data recording density information) from the disc is set. That is, the reproduction condition that matches the format of the BCA area 111 or the PIC area 112 is set.
- the optical head is moved to the management information recording area (BCA area 111 or PIC area 112) on the disk.
- the disc management information is read from the management information recording area.
- the disc management information (data recording density, density boundary address value) read from the management information recording area is stored in the density information storage memory 50.
- the host waits for an information recording or reproduction instruction command from the host.
- the process proceeds to the recording / reproducing process.
- a command for recording or reproducing information is received from the host.
- the target address for recording / reproduction is acquired from the received command.
- the recording / reproduction conditions at the target address are set from the target address and the disc management information (data recording density, density boundary address value) stored in the density information storage memory 50. That is, the recording / reproduction processing conditions (reproduction signal processing circuit, wobble signal processing circuit, recording strategy) are set to the conditions for 25 GB / layer or the conditions for 33 GB / layer.
- the recording density of each area up to the target address and the number of track crossings (TES) up to the target address are calculated from the target address and the disk management information stored in the density information storage memory 50.
- the number of track crossings is counted and a seek operation is performed to the target area.
- the address of the arrival position is read and the end of seek is confirmed.
- S417 the data recording / reproducing operation is started.
- S418 it is determined whether the recording / reproducing address is a boundary address of recording density. If it is a boundary, the process proceeds to S419. If not, the process proceeds to S422.
- the recording / reproducing operation is interrupted.
- the recording density information of the next area is read from the density information storage memory 50, and the recording / reproduction processing conditions (reproduction signal processing circuit, wobble signal processing circuit, recording strategy) corresponding to the density are set.
- the recording / reproduction processing conditions reproduction signal processing circuit, wobble signal processing circuit, recording strategy
- S422 recording / reproduction processing is performed in units of one address.
- S423 it is determined whether or not all the recording / playback data has been completed. If there is remaining data, the process returns to S418 and continues. If there is no remaining data, the recording / reproducing process ends in S424.
- disc management information (recording density arrangement, boundary address) is recorded in a fixed format in the BCA area or PIC area. Has been. Therefore, the reproduction condition of the management information is uniquely determined and can be easily determined without error. Then, according to the recording density at the target position in the disc, a recording / reproducing operation suitable for each recording density can be executed.
- This embodiment is intended for a multi-layer disc (hereinafter referred to as type D) in which a data recording density is a standard density (25 GB / layer) layer and a high density (33 GB / layer) layer.
- Type D discs can be recorded and reproduced by either a conventional device that supports standard density (25 GB / layer) or a high-density device that supports high density (33 GB / layer).
- FIG. 11 is a diagram showing an example of a recording format of the optical disc (type D).
- 25 GB / layer layers and 33 GB / layer layers are alternately arranged in four layers.
- the recording layers are designated as L0, L1, L2, and L3 from the disk surface side.
- a BCA area 121, a PIC area 122, and data recording areas 123 and 124 are arranged from the inner circumference side.
- Data is recorded at a recording density of 25 GB / layer or 33 GB / layer in the data recording areas 123 and 124 of each layer.
- the BCA region 121 exists in each layer, the PIC region 122 is formed only in the L0 layer.
- disc management information (data recording density information) is recorded in the PIC area 122. Since the PIC area 122 has a fixed format, the disc management information is recorded at a specific recording density. In other words, the recording density of the disc management information does not depend on the data recording density of the adjacent data recording area 123. It should be noted that compatibility with a conventional device compatible with the standard density (25 GB / layer) can be maintained by always setting the recording density of the L0 layer having the PIC area 122 to the standard 25 GB / layer. Alternatively, the PIC area 122 may be arranged in a recording layer that has the lowest data recording density.
- FIG. 12 is a diagram showing a notation example of disk management information (data recording density information) in the disk D. It is an example of bit arrangement when describing density information. As information contents, a description column of recording density for each layer is provided, and the data recording density is described by 2 bits. Here, a column for 8 layers is provided, and the recording density 25 GB / layer is defined as “00” bits and the recording density 33 GB / layer is defined as “01” bits.
- FIG. 13 is a diagram showing a configuration example of the optical disc recording / reproducing apparatus in the present embodiment.
- the configuration of FIG. 3 includes a density information storage memory 60, a focus error signal (FES) generation circuit 62, a focus error servo circuit 63, and a current layer determination circuit 64.
- the FES generation circuit 62 generates a crossing signal from each layer, and the focus error servo circuit 63 performs focus pull-in to the target layer.
- the density information of each layer read from the type D disk is stored in the density information storage memory 60 and is referred to by the current layer determination circuit 64.
- the current layer determination circuit 64 receives the FE signal from the FES generation circuit 62 and the reproduction address from the address generation circuit 17 and determines how many layers the current layer is. Also, the recording density of the current layer (25 GB / layer or 33 GB / layer) is determined based on the density information from the density information storage memory 60. Based on the determination result, the first and second reproduction signal processing circuits 9 and 10 are switched, the first and second wobble signal processing circuits 14 and 15 are switched, and the first and second strategy storage memories 30 and 31 are switched. Switch.
- FIG. 14 is a flowchart showing the procedure of the recording / reproducing process of this embodiment.
- (A) is a step at the time of disk loading, and
- (b) is a step at the time of recording / reproducing processing.
- the disc is inserted into the optical disc apparatus.
- the disc is a disc (type D) in which a standard density (25 GB / layer) layer and a high density (33 GB / layer) layer are mixed and mixed.
- the focus of the optical head is drawn into a specific layer (L0 layer) in which disk management information (data recording density information) is recorded.
- L0 layer specific layer
- disk management information data recording density information
- a playback condition for reading the disc management information from the disc is set.
- the optical head is moved to the management information recording area (PIC area 122) on the disk.
- the disc management information is read from the management information recording area.
- the disc management information (data recording density of each layer) read from the management information recording area is stored in the density information storage memory 60.
- the host waits for an information recording or reproduction instruction command from the host.
- step S511 a command for recording or reproducing information is received from the host.
- step S512 the recording / playback target address is acquired from the received command.
- step S513 the target layer number is calculated from the target address for recording / reproduction.
- the information stored in the density information storage memory 60 is referred to determine the recording density of the target layer.
- the process proceeds to S515, and the recording / reproduction processing conditions (reproduction signal processing circuit, wobble signal processing circuit, recording strategy) for 25 GB / layer are set.
- the recording density is 33 GB / layer, the process proceeds to S516, and the recording / reproduction processing conditions (reproduction signal processing circuit, wobble signal processing circuit, recording strategy) for 33 GB / layer are set.
- the disc management information (recording density of each layer) is recorded in a unique format in the PIC area. Therefore, the reproduction condition of the management information is uniquely determined and can be easily determined without error. Then, according to the recording density of the target layer in the disc, a recording / reproducing operation suitable for each recording density can be executed.
- a multi-layer disk having a data recording density of a standard density (25 GB / layer) layer and a high density (33 GB / layer) layer is targeted.
- the disc management information data recording density information
- the disc management information is recorded in a partial area of the standard density (25 GB / layer) data recording area (hereinafter this disc is referred to as type E).
- the information can be recorded after the disc is manufactured.
- the disc manufacturer inspects each disc manufactured after disc manufacture and determines whether there are any unusable layers. Then, the determination result can be recorded in the disc management information together with the recording density information of each layer.
- FIG. 15 is a diagram showing an example of a recording format of the optical disc (type E).
- the disk has four layers of 25 GB / layer and 33 GB / layer alternately arranged, and each layer is L0, L1, L2, L3 from the disk surface side.
- a BCA area 131, a PIC area 132 (only the L0 layer), and data recording areas 133 and 134 are arranged from the inner peripheral side.
- a management information recording area 135 is provided in part of the data recording areas 133 of the L0 layer and the L2 layer whose recording density is the standard density (25 GB / layer).
- the management information recording area 135 may be provided in the data recording area of the recording layer having the lowest data recording density.
- Management information is recorded in the management information recording area 135 with embossed pits or rewritable marks.
- the contents of the management information include availability information of each layer along with the data recording density of each layer. For example, it is set to “1” bit if it can be used, and “0” bit if it cannot be used.
- FIG. 16 is a diagram showing another example of the recording format of the optical disc (type E).
- the management information recording area 136 is provided in all layers. In any area, management information is recorded with embossed pits or rewritable marks according to a standard recording density (25 GB / layer) format.
- the optical disc apparatus reads disc management information (recording density information, availability information) at the time of disc loading and stores it in a density information storage memory. At the time of recording / reproducing, the recording / reproducing condition is switched according to the recording density of each layer, and the useless operation can be avoided by stopping the recording / reproducing operation for the unusable layer.
- disc management information recording density information, availability information
- FIG. 17 is a flowchart showing the procedure of the recording / reproducing process of this embodiment.
- the process at the time of disk loading is shown.
- the disc is inserted into the optical disc apparatus.
- the disk is a disk (type E, type E ′) in which a layer having a standard density (25 GB / layer) and a layer having a high density (33 GB / layer) are mixed.
- the management information is recorded in a data recording area of standard density (25 GB / layer).
- the focus of the optical head is drawn into a layer having a standard density (25 GB / layer).
- the disc of FIG. 15 (type E) it is drawn into the L0 layer or the L2 layer.
- any layer may be used.
- a playback condition for reading the disc management information from the disc is set. That is, the reproduction condition is set to the standard density (25 GB / layer).
- the optical head is moved to the management information recording areas 135 and 136.
- the disc management information is read from the management information recording area.
- the read disk management information (recording density information, availability information) is stored in the density information storage memory 60.
- the host waits for an information recording or reproduction instruction command from the host.
- the recording density of the target layer is determined, and the recording / reproducing conditions are switched according to the recording density. If the target layer is an unusable layer, the recording / reproducing operation in that layer is stopped and reported to the host as necessary.
- disc management information (recording density of each layer, availability information) in a part of the standard density data recording region. Are recorded in a standard density format. Therefore, the reproduction condition of the management information is uniquely determined and can be determined without error. Further, according to the recording density of the target layer in the disc, not only the recording / reproducing operation suitable for each recording density is performed, but also the unusable recording layer is avoided by referring to the availability information of each recording layer. be able to.
- BCA Breast Cutting Area
- PIC Personal Information & Control data
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Abstract
Description
(1)リードインエリアの場合、フォーマット情報自身が、そのリードインエリアが属する層のフォーマットに依存して記録されている。リードンエリアから情報を読み出すためにはそのフォーマットが既知でなければならないが、層とフォーマットの対応が決められていない場合、リードンエリアの情報の読み出しに失敗することが予想される。
(2)フォーマット情報を記録する領域(ディスク管理情報領域)が高密度フォーマットで記録される領域であると、従来の標準密度(=低密度)にのみ対応した装置では読み出し不能となりディスクの判別が不可能である。
(3)多層ディスクの場合、各層のフォーマットとともに層の記録可否情報を合わせて管理することが望ましい。その場合、ディスク製造後にフォーマット情報を記録できることが必要となる。特許文献2に示されるリードインエリアやBCAは、ディスク製造時に作成されるものであって、製造後に記録することはできない。
タイプA、タイプBのディスクは、ディスク内周側から、BCA(Burst Cutting Area)領域101、PIC(Permanent Information & Control data)領域102、データ記録領域103,104が置されている。BCA領域101は、ディスクの中心側に28.6μm間隔に4~17μm幅のバーコードで情報が記載され、データ記録領域の記録密度とは独立した記録密度となっている。これらはディスク製造後にYAGレーザーと呼ばれる強力な赤外線レーザーにより反射膜を焼き切ることにより記録される。本領域はディスク製造後にメーカーの必要情報を記載するための領域であり、例えば各ディスクの識別を行なうためのシリアルID、および暗号化情報などが記録される。またPIC領域102は、BDにおける管理情報領域であり、チャネルクロックの整数倍で定義された高周波グルーブ(HFMグルーブ)で形成されている。HFMグルーブの領域ではディスクフォーマットに従ったピット、マークなどデータ情報の記録を行わないため、グルーブ周波数をデータ領域の記録密度とは独立して設定可能である。これらはディスク製造時にスタンパ等によりデータ領域のウォブル(溝)と同様に形成され、ディスク製造時にあらかじめ定められた、例えば記録/再生に必要とされるレーザーパワー値などが記述される。データ記録領域103と104には、それぞれ記録密度25GB/layerと33GB/layerにて情報(データ)を記録する。
主な構成要素を説明する。1は光ディスク(ここでは図1に示したBD)、2は光ディスクを回転させるスピンドルモータ、25は光ヘッドである。光ヘッド25は、光ディスク1にレーザー光(波長405nm近傍の青色レーザー)を照射して、ディスク管理情報を読み出すとともに、光ディスク1のデータ記録領域103,104に対し情報の記録/再生を行う。また、複数のデータ記録密度に対応するため、密度判定回路35、第1および第2の再生信号処理回路9,10、第1および第2のウォブル信号処理回路14,15、第1および第2のストラテジ格納メモリ30,31を備える。マイコン32は、ディスク管理情報の読み出し、記録再生処理回路の設定、記録再生動作の実行などを制御する。
S301では、光ディスク装置にディスクを挿入する。ここでは、ディスクは25GB/layer(タイプA)か、33GB/layer(タイプB)である。
S302では、ディスクからディスク管理情報(データ記録密度情報)を読み出すための再生条件を設定する。すなわち、BCA領域101またはPIC領域102のフォーマットに従った再生条件を設定する。
S303では、光ヘッドをディスク上の管理情報記録領域(BCA領域またはPIC領域)へ移動させる。
S304では、管理情報記録領域からディスク管理情報を読み出す。
25GB/layer(タイプA)の場合は、S306へ進み、25GB/layer用の記録再生処理条件(再生信号処理回路、ウォブル信号処理回路、記録ストラテジ)に設定する。
33GB/layer(タイプB)の場合は、S307へ進み、33GB/layer用の記録再生処理条件(再生信号処理回路、ウォブル信号処理回路、記録ストラテジ)に設定する。
S308では、ホストから情報の記録または再生指示のコマンドを待ち、指示があったらS306またはS307にて設定した条件にて記録/再生動作を実行する。
タイプCのディスクは、同一面内に内周側から、BCA領域111、PIC領域112、第1の記録密度領域(25GB/layer)113、第2の記録密度領域(33GB/layer)114の順に配置されている。符号115は、第1の記録密度領域113と第2の記録密度領域114との境界である。この境界部115には、半径方向に所定幅の未記録部(ギャップ領域)を持たせても良い。BCA領域111またはPIC領域112には、ディスク管理情報(データ記録密度情報)を記録する。BCA領域111とPIC領域112は固有のフォーマットを有するので、ディスク管理情報は特定の記録密度にて記録される。言い換えれば、ディスク管理情報の記録密度は、ディスク内のデータ記録領域113,114のデータ記録密度に依存しない。
S402では、ディスクからディスク管理情報(データ記録密度情報)を読み出すための再生条件を設定する。すなわち、BCA領域111またはPIC領域112のフォーマットに適合する再生条件を設定する。
S403では、光ヘッドをディスク上の管理情報記録領域(BCA領域111またはPIC領域112)へ移動させる。
S405では、管理情報記録領域から読み出したディスク管理情報(データ記録密度、密度境界アドレス値)を密度情報格納メモリ50に格納する。
S406では、ホストから情報の記録または再生指示のコマンドを待つ。
S411では、ホストから情報の記録または再生のコマンドを受ける。
S412では、受けたコマンドから記録/再生の目標アドレスを取得する。
S413では、目標アドレスと、密度情報格納メモリ50に格納しているディスク管理情報(データ記録密度、密度境界アドレス値)とから、目標アドレスでの記録/再生条件に設定する。すなわち、記録再生処理条件(再生信号処理回路、ウォブル信号処理回路、記録ストラテジ)を25GB/layer用の条件、または33GB/layer用の条件に設定する。
S415では、トラックよぎり数をカウントして、目標領域へシーク動作する。
S416では、到着位置のアドレスを読み出して、シーク終了を確認する。
S418では、記録/再生アドレスが記録密度の境界アドレスかどうかを判定する。境界の場合はS419へ、境界でなければS422へ進む。
S420では、密度情報格納メモリ50から次の領域の記録密度情報を読み出し、その密度に対応する記録再生処理条件(再生信号処理回路、ウォブル信号処理回路、記録ストラテジ)に設定する。
S421では、次の記録密度領域まで移動する。
S423では、記録/再生用データが全て終了したかどうか判定する。残りのデータがあればS418へ戻り処理を継続する。残りのデータがなくなれば、S424にて記録再生処理を終了する。
S502では、光ヘッドのフォーカスを、ディスク管理情報(データ記録密度情報)が記録されている特定の層(L0層)へ引き込む。
S503では、ディスクからディスク管理情報を読み出すための再生条件を設定する。
S504では、光ヘッドをディスク上の管理情報記録領域(PIC領域122)へ移動させる。
S506では、管理情報記録領域から読み出したディスク管理情報(各層のデータ記録密度)を密度情報格納メモリ60に格納する。
S507では、ホストから情報の記録または再生指示のコマンドを待つ。
S511では、ホストから情報の記録または再生のコマンドを受ける。
S512では、受けたコマンドから記録/再生の目標アドレスを取得する。
S513では、記録/再生の目標アドレスから目標層が何層目かを計算する。
記録密度が25GB/layerの場合は、S515へ進み、25GB/layer用の記録再生処理条件(再生信号処理回路、ウォブル信号処理回路、記録ストラテジ)に設定する。
記録密度が33GB/layerの場合は、S516へ進み、33GB/layer用の記録再生処理条件(再生信号処理回路、ウォブル信号処理回路、記録ストラテジ)に設定する。
S518では、到着位置のアドレスを読み出して、シーク終了を確認する。
S519では、記録/再生動作を開始する。
ディスクは、25GB/layerの層と33GB/layerの層とを交互に4層配置し、ディスク表面側から各層をL0,L1,L2,L3とする。また内周側から、BCA領域131、PIC領域132(L0層のみ)、データ記録領域133,134を配置している。そして、記録密度が標準密度(25GB/layer)であるL0層とL2層のデータ記録領域133の一部には、管理情報記録領域135を設ける。このように管理情報を標準の記録密度の領域に記録することで、管理情報のフォーマットが一義に決定され、また従来の装置でも確実に管理情報を読み出すことができる。なお、L0層は常に標準密度(25GB/layer)の記録層であるように決めておけば、管理情報をより確実に読み出すことができる。あるいは、管理情報記録領域135をデータ記録密度が最低となる記録層のデータ記録領域に設けても良い。
これは、標準記録密度(25GB/layer)の層がどの層であるか分からない場合に、全ての層に管理情報記録領域136を設けたものである。いずれの領域も、標準記録密度(25GB/layer)のフォーマットに従い、エンボスピットや書換え可能なマークで管理情報を記録する。
S601では、光ディスク装置にディスクを挿入する。ここでは、ディスクは標準密度(25GB/layer)の層と高密度(33GB/layer)の層とが多層化されて混在するディスク(タイプE、タイプE’)である。管理情報は、標準密度(25GB/layer)のデータ記録領域に記録されている。
S602では、光ヘッドのフォーカスを、標準密度(25GB/layer)の層へ引き込む。図15のディスク(タイプE)の場合には、L0層またはL2層へ引き込む。図16のディスク(タイプE’)の場合には、いずれの層でも良い。
S603では、ディスクからディスク管理情報を読み出すための再生条件を設定する。すなわち、標準密度(25GB/layer)の再生条件に設定する。
S604では、光ヘッドを管理情報記録領域135,136へ移動させる。
S606では、読み出したディスク管理情報(記録密度情報、使用可否情報)を密度情報格納メモリ60に格納する。
S607では、ホストから情報の記録または再生指示のコマンドを待ち、コマンドを受けたら記録再生処理に進む。
記録再生工程では、目標層の記録密度を判定して、記録密度に応じて記録再生条件を切り替える。もしも目標層が使用不可の層である場合は、その層での記録再生動作を中止し、必要に応じてホストに報告する。
2…スピンドルモータ、
9,10…再生信号処理回路、
12…復調回路、
14,15…ウォブル信号処理回路、
17…アドレス生成回路、
25…光ヘッド、
27…記録ストラテジ生成回路、
30,31…ストラテジ格納メモリ、
32…マイコン、
35…密度判定回路、
40…回転制御回路、
42,43…回転制御係数格納メモリ、
50,60…密度情報格納メモリ、
51…アドレス判定回路、
52…トラッキングよぎり数(TES)カウント回路、
62…フォーカスエラー信号(FES)生成回路、
64…現在層判定回路、
101,111,121,131…BCA(Burst Cutting Area)領域、
102,112,122,132…PIC(Permanent Information & Control data)領域、
103,104,113,114,123,124,133,134…データ記録領域、
135,136…管理情報記録領域。
Claims (14)
- 所定の記録密度で情報を記録する光ディスクにおいて、
情報を記録するためのデータ記録領域と、
該データ記録領域におけるデータ記録密度の情報を含むディスク管理情報を記録するための管理情報記録領域を有し、
該管理情報記録領域には、上記データ記録領域のデータ記録密度に依存しない特定のフォーマットにて上記ディスク管理情報を記録したことを特徴とする光ディスク。 - 複数の記録密度で情報を記録可能な光ディスクにおいて、
同一面内に分割して配置され、互いに異なるデータ記録密度にて情報を記録する複数のデータ記録領域と、
該複数のデータ記録領域における各々のデータ記録密度と各データ記録領域の境界位置の情報を含むディスク管理情報を記録するための管理情報記録領域を有し、
該管理情報記録領域には、上記複数のデータ記録領域の各々のデータ記録密度に依存しない特定のフォーマットにて上記ディスク管理情報を記録したことを特徴とする光ディスク。 - 複数の記録層を有し複数の記録密度で情報を記録可能な光ディスクにおいて、
記録層毎に異なるデータ記録密度にて情報を記録する複数のデータ記録領域と、
各記録層のデータ記録領域における各々のデータ記録密度の情報を含むディスク管理情報を記録するための管理情報記録領域を有し、
該管理情報記録領域には、上記複数のデータ記録領域の各々のデータ記録密度に依存しない特定のフォーマットにて上記ディスク管理情報を記録したことを特徴とする光ディスク。 - 複数の記録層を有し複数の記録密度で情報を記録可能な光ディスクにおいて、
記録層毎に異なるデータ記録密度にて情報を記録する複数のデータ記録領域と、
該複数のデータ記録領域における各々のデータ記録密度を含むディスク管理情報を記録するための管理情報記録領域を有し、
該管理情報記録領域は、上記複数のデータ記録領域の中でデータ記録密度が標準密度であるデータ記録領域内の一部領域に配置し、上記ディスク管理情報を該領域のデータ記録密度のフォーマットにて記録したことを特徴とする光ディスク。 - 請求項3に記載の光ディスクにおいて、
前記管理情報記録領域は、前記複数のデータ記録領域の中でデータ記録密度が標準密度であるデータ記録領域に近接して配置したことを特徴とする光ディスク。 - 請求項1乃至3のいずれか1項に記載の光ディスクにおいて、
前記管理情報記録領域として、BCA(Burst Cutting Area)領域またはPIC(Permanent Information & Control data)領域を用いたことを特徴とする光ディスク。 - 請求項4に記載の光ディスクにおいて、
前記管理情報記録領域には、前記ディスク管理情報として各記録層の使用可否を示す情報を含めて記録したことを特徴とする光ディスク。 - 光ディスクのデータ記録領域に情報を記録または再生する光ディスク記録再生装置において、
上記光ディスクの管理情報記録領域には、上記データ記録領域のデータ記録密度に依存しない特定のフォーマットにて上記データ記録領域のデータ記録密度の情報を含むディスク管理情報が記録されているものであって、
上記光ディスクを回転させるスピンドルモータと、
上記光ディスクの上記管理情報記録領域から上記ディスク管理情報を読み出すとともに、上記光ディスクのデータ記録領域に情報を記録または再生する光ヘッドと、
上記光ヘッドに供給する記録信号または上記光ヘッドからの再生信号を処理する記録再生処理部と、
上記光ヘッドにより読み出した上記ディスク管理情報から目標のデータ記録領域のデータ記録密度を判定する記録密度判定回路と、を備え、
上記記録再生処理部は、上記記録密度判定回路により判定したデータ記録密度に応じて記録再生処理条件を選択して設定することを特徴とする光ディスク記録再生装置。 - 請求項8に記載の光ディスク記録再生装置において、
前記光ディスクは、同一面内に分割して配置され、互いに異なるデータ記録密度にて情報を記録する複数のデータ記録領域を有するものであって、
前記光ヘッドにより読み出した前記ディスク管理情報から各データ記録領域のデータ記録密度と境界位置の情報を格納する密度情報格納メモリと、
上記密度情報格納メモリに格納した上記ディスク管理情報を参照し、目標のデータ記録領域のデータ記録密度を判定するアドレス判定回路を備え、
前記記録再生処理部は、上記アドレス判定回路の判定により目標のデータ記録領域が他のデータ記録領域に切り替わるとき、次のデータ記録領域のデータ記録密度に応じた記録再生処理条件を選択して設定することを特徴とする光ディスク記録再生装置。 - 請求項8に記載の光ディスク記録再生装置において、
前記光ディスクは、複数の記録層を有し記録層毎に異なるデータ記録密度にて情報を記録する複数のデータ記録領域を有するものであって、
前記光ヘッドにより読み出した前記ディスク管理情報から各記録層のデータ記録領域のデータ記録密度を格納する密度情報格納メモリと、
上記密度情報格納メモリに格納した上記ディスク管理情報を参照し、現在層のデータ記録領域のデータ記録密度を判定する現在層判定回路を備え、
前記記録再生処理部は、上記現在層判定回路の判定により目標のデータ記録領域が他の記録層のデータ記録領域に切り替わるとき、次の記録層のデータ記録領域のデータ記録密度に応じた記録再生処理条件を選択して設定することを特徴とする光ディスク記録再生装置。 - 請求項8乃至10のいずれか1項に記載の光ディスク記録再生装置において、
前記記録再生処理部は、再生信号処理回路、ウォブル信号処理回路および記録ストラテジ生成回路を含み、データ記録密度に応じて各回路の処理条件を選択して設定することを特徴とする光ディスク記録再生装置。 - 光ディスクのデータ記録領域に情報を記録または再生する情報記録再生方法において、
上記光ディスクの管理情報記録領域には、上記データ記録領域のデータ記録密度に依存しない特定のフォーマットにて上記データ記録領域のデータ記録密度の情報を含むディスク管理情報が記録されており、
上記特定のフォーマットに従って上記ディスク管理情報を再生するための再生条件を設定するステップと、
上記光ディスクの上記管理情報記録領域から上記ディスク管理情報を読み出すステップと、
読み出した上記ディスク管理情報から目標のデータ記録領域のデータ記録密度を判定するステップと、
判定したデータ記録密度に応じて記録再生処理条件を選択して設定するステップと、
設定した記録再生処理条件にて目標のデータ記録領域にて情報を記録または再生するステップと、
を備えることを特徴とする情報記録再生方法。 - 請求項12に記載の情報記録再生方法において、
前記光ディスクは、同一面内に分割して配置され、互いに異なるデータ記録密度にてデータを記録する複数のデータ記録領域を有するとき、
読み出した前記ディスク管理情報から各データ記録領域のデータ記録密度をメモリに格納するステップを備え、
目標のデータ記録領域が他のデータ記録領域に切り替わるとき、上記メモリを参照して、次のデータ記録領域のデータ記録密度に応じた記録再生処理条件を選択して設定することを特徴とする情報記録再生方法。 - 請求項12に記載の情報記録再生方法において、
前記光ディスクは、複数の記録層を有し記録層毎に異なるデータ記録密度にてデータを記録する複数のデータ記録領域を有するとき、
読み出した前記ディスク管理情報から各記録層のデータ記録領域のデータ記録密度をメモリに格納するステップを備え、
目標のデータ記録領域が他の記録層のデータ記録領域に切り替わるとき、上記メモリを参照して、次の記録層のデータ記録領域のデータ記録密度に応じた記録再生処理条件を選択して設定することを特徴とする情報記録再生方法。
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EP09817377.6A EP2346039A4 (en) | 2008-09-30 | 2009-05-12 | OPTICAL DISK, OPTICAL DISC RECORDING / READING APPARATUS, AND INFORMATION RECORDING / READING METHOD |
US12/995,242 US8325578B2 (en) | 2008-09-30 | 2009-05-12 | Optical disc, optical disc recording/playback apparatus, and information recording/playback method |
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EP2346039A1 (en) | 2011-07-20 |
JP2010086596A (ja) | 2010-04-15 |
US8325578B2 (en) | 2012-12-04 |
BRPI0912119A2 (pt) | 2015-11-03 |
EP2346039A4 (en) | 2016-07-06 |
MX2010013065A (es) | 2011-02-15 |
JP5238436B2 (ja) | 2013-07-17 |
CN102047331B (zh) | 2013-06-05 |
CN102047331A (zh) | 2011-05-04 |
US20110096641A1 (en) | 2011-04-28 |
MY152275A (en) | 2014-09-15 |
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