WO2013014726A1 - Dispositif et procédé de détermination de disque, programme informatique, dispositif à disque et dispositif audiovisuel - Google Patents

Dispositif et procédé de détermination de disque, programme informatique, dispositif à disque et dispositif audiovisuel Download PDF

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Publication number
WO2013014726A1
WO2013014726A1 PCT/JP2011/066739 JP2011066739W WO2013014726A1 WO 2013014726 A1 WO2013014726 A1 WO 2013014726A1 JP 2011066739 W JP2011066739 W JP 2011066739W WO 2013014726 A1 WO2013014726 A1 WO 2013014726A1
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WO
WIPO (PCT)
Prior art keywords
optical
disc
disk
optical disk
held
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Application number
PCT/JP2011/066739
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English (en)
Japanese (ja)
Inventor
佐々木　儀央
靖史 大島
Original Assignee
パイオニアデジタルデザインアンドマニュファクチャリング株式会社
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.)
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Priority to PCT/JP2011/066739 priority Critical patent/WO2013014726A1/fr
Publication of WO2013014726A1 publication Critical patent/WO2013014726A1/fr

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • 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
    • G11B2007/0016—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers adapted to have label information written on the non-data side by the optical head used for data recording, e.g. lightscribe, labelflash

Definitions

  • the present invention relates to a technical field of a disc discriminating apparatus and method for discriminating the type of an optical disc such as a Blu-ray Disc (BD), a computer program, a disc device, and an audio visual device.
  • BD Blu-ray Disc
  • a copy protection code is embedded in the BCA (Burst Cutting Area) provided on the recording surface of the Blu-ray disc, and no copy protection code is embedded in the BCA provided on the label surface of the Blu-ray disc.
  • BCA Breast Cutting Area
  • Patent Document 1 An apparatus for determining whether or not a label surface is present based on the presence or absence of a copy protection code has been proposed (see Patent Document 1).
  • the information formed in the information area of the label surface of the optical disk is read, and the time axis of the read information is inverted and decoded to obtain the disk identification code, and the obtained disk identification
  • Patent Document 2 An apparatus for determining whether an optical disk is a visible image recordable disk based on a code has been proposed (see Patent Document 2).
  • the present invention has been made in view of the above-described problems, for example.
  • the disk discriminating apparatus of the present invention is mounted on a disk apparatus provided with an optical pickup capable of irradiating an optical laser onto an optical disk having a data recording surface and a label surface arranged to face each other. And reading the unique information specific to the held optical disk recorded on the data recording surface, provided that the optical pickup side surface of the optical disk held by the disk device is a data recording surface. And determination means for determining whether the held optical disk is an optical disk that can be drawn on a label surface in accordance with the read unique information.
  • the disc discriminating device is a disc apparatus provided with an optical pickup capable of irradiating an optical laser with respect to an optical disc having a data recording surface and a label surface arranged to face each other. Installed.
  • the reading means including a memory, a processor, etc. is specific to the held optical disk recorded on the data recording surface on the condition that the optical pickup side surface of the optical disk held in the disk device is a data recording surface. Read specific information of.
  • “Holding in the disk device” means being held by a holding member such as a cylindrical member fitted in the center hole of the optical disk.
  • the “surface on the optical pickup side” is the surface on the data recording surface and label surface of the optical disc that is irradiated with the optical laser from the optical pickup, in other words, the surface on the data recording surface and label surface that is close to the optical pickup. means.
  • “Inherent information unique to an optical disc” is information that can identify one optical disc from other optical discs, such as BCA information and Emergency Break. Whether it is a data recording surface or not may be determined by, for example, the intensity of reflected light reflected by the optical disc, the presence or absence of a wobble signal, and the like.
  • a determination unit including a memory, a processor, a comparator, and the like determines whether the held optical disk is an optical disk that can be drawn on the label surface, according to the read unique information.
  • “drawable” means that a visible image such as a character or a pattern is drawn on the label surface of the optical disc, for example, by thermally decomposing a dye disposed on the label surface of the optical disc by the heat of an optical laser. Means you can.
  • the disc discriminating apparatus appropriately discriminates the type of the optical disc. be able to.
  • the unique information is BCA information.
  • the unique information can be appropriately read without adding a special configuration for reading the unique information, which is very advantageous in practice.
  • the determination unit may determine that the held optical disk is an optical disk that can be drawn on a label surface on the condition that a value related to the read unique information is within a predetermined range. .
  • the determination means determines that the held optical disk is an optical disk that can be drawn on the label surface on the condition that the value related to the read unique information is within a predetermined range.
  • the determination means is typically not an optical disk capable of drawing the held optical disk on the label surface on the condition that the value related to the read unique information is determined not to be within the predetermined range. judge.
  • the “predetermined range” is typically defined by, for example, an optical disk manufacturer or a disk device manufacturer.
  • the unique information is emergency break information.
  • the held optical disk is an optical disk that can be drawn on the label surface.
  • the held optical disk is a label on the condition that the determining means determines that the held optical disk is an optical disk that can be drawn on a label surface.
  • Notification means for notifying the user of the disc discriminating apparatus that the disc is an optical disc that can be drawn on the surface is further provided.
  • the user can relatively easily know whether or not the optical disk held in the disk device is an optical disk that can be drawn on the label surface, which is very advantageous in practice.
  • the disc discriminating method of the present invention is mounted on a disc apparatus having an optical pickup capable of irradiating an optical laser onto an optical disc having a data recording surface and a label surface arranged to face each other.
  • the disc discriminating method in the disc discriminating apparatus wherein the holding is recorded on the data recording surface on the condition that the optical pickup side surface of the optical disc held in the disc device is a data recording surface
  • the disc discriminating method of the present invention as in the disc discriminating apparatus of the present invention described above, if information indicating that drawing is possible on the label surface is recorded as unique information on the optical disc that can be drawn on the label surface. Therefore, it is possible to appropriately determine the type of the optical disc.
  • the computer program of the present invention causes a computer to function as the above-described disk discriminating device of the present invention (including various aspects thereof).
  • the computer program is provided in a disk device from a recording medium such as a CD-ROM (Compact Read Only Memory) or a DVD-ROM (DVD Read Only Memory) for storing the computer program.
  • a recording medium such as a CD-ROM (Compact Read Only Memory) or a DVD-ROM (DVD Read Only Memory) for storing the computer program.
  • the disk discriminating apparatus of the present invention described above can be realized relatively easily if it is read and executed by a computer, or if the computer program is downloaded and then executed via communication means.
  • the disc discriminating apparatus of the present invention described above if information indicating that drawing is possible on the label surface is recorded as unique information on the optical disc that can be drawn on the label surface, the type of the optical disc The discrimination can be performed appropriately.
  • a disk device of the present invention includes a holding means for holding an optical disk having a data recording surface and a label surface that are arranged to face each other, and an optical laser for the held optical disk.
  • Specific information specific to the held optical disc recorded on the data recording surface is provided on the condition that the optical pickup capable of irradiating and the optical pickup side surface of the held optical disc is a data recording surface.
  • the disc device of the present invention as in the disc discriminating device of the present invention described above, if information indicating that drawing is possible on the label surface is recorded as specific information on the optical disc that can be drawn on the label surface, Discrimination of the type of the optical disc can be performed appropriately.
  • disk device of the present invention can also adopt various aspects similar to the various aspects of the disk discriminating apparatus of the present invention described above.
  • an audio visual apparatus is an optical disk on which the held optical disk can be drawn on a label surface by the above-described disk device of the present invention, a display unit, and the determination unit.
  • the audio visual apparatus of the present invention as in the disk discriminating apparatus of the present invention described above, information indicating that drawing is possible on the label surface is recorded as specific information on the optical disk that can be drawn on the label surface. Therefore, it is possible to appropriately determine the type of the optical disc.
  • audio visual apparatus of the present invention can also adopt various aspects similar to the various aspects of the disk discriminating apparatus of the present invention described above.
  • FIG. 1 is a block diagram showing a configuration of a disk device according to a first embodiment.
  • 1 is a cross-sectional view of an optical disc according to a first embodiment. It is sectional drawing of the optical disk which concerns on the comparative example of 1st Embodiment.
  • It is a flowchart which shows the 1st disc discrimination
  • It is a flowchart which shows the 2nd disc discrimination
  • FIG. 1 is a block diagram showing the configuration of the audiovisual apparatus according to the present embodiment.
  • an audio visual apparatus 500 includes a recording / reproducing apparatus 200 and a television 300 as an example of a “display unit” according to the present invention.
  • the recording / reproducing apparatus 200 includes a disk device 100 (Optical Disc Drive: ODD), a CPU (Central Processing Unit) 210, a memory 220, an ODD interface 230, a hard disk drive (HDD) 240, an HDD interface 250, a user An interface (UI) controller 260, a tuner 270 electrically connected to the antenna 400, and an audio & video controller 280 are configured.
  • a disk device 100 Optical Disc Drive: ODD
  • a CPU Central Processing Unit
  • memory 220 an ODD interface 230
  • HDD hard disk drive
  • HDD hard disk drive
  • HDD HDD interface 250
  • UI user An interface
  • tuner 270 electrically connected to the antenna 400
  • an audio & video controller 280 are configured.
  • CPU 210 memory 220, ODD interface 230, HDD interface 250, UI controller 260, tuner 270, and audio & video controller 280 are electrically connected to each other via a bus.
  • the UI controller 260 is configured to receive a signal output from the remote controller 290.
  • FIG. 2 is a block diagram showing the configuration of the disk device according to the present embodiment.
  • the disk device 100 includes an optical pickup (OPU) 10, a digital signal control unit 20, a spindle motor 31, a spindle driver 32, a thread motor 33, a thread driver 34, and a focusing driver 35.
  • OPU optical pickup
  • a tracking driver 36 an RF (Radio Frequency) amplifier 37, and a CPU 38.
  • the optical pickup 10 includes an objective lens 11, a laser diode (LD) 12 that can irradiate the optical disk 50 with a light beam via the objective lens 11, and a light receiving element (PhotoDetector: PD) that can receive reflected light from the optical disk 50. ) 13 and a lens actuator 14 capable of changing the position of the objective lens 11.
  • LD laser diode
  • PD light receiving element
  • the digital signal control unit 20 detects an RF signal based on the signal output from the light receiving element 13 and detects an FE (Focus Error) signal based on the signal output from the light receiving element 13.
  • the FE detection unit 22 and a Push-Pull signal detection unit 23 that detects a Push-Pull signal based on a signal output from the light receiving element 13 are provided.
  • the spindle driver 32 controls the rotational speed of the spindle motor 31 and the like based on the signal output from the digital signal control unit 20.
  • the thread driver 34 controls the thread motor 33 so as to change the positional relationship between the optical pickup 10 and the optical disk 50 based on the signal output from the digital signal control unit 20.
  • Each of the focusing driver 35 and the tracking driver 36 controls the lens actuator 14 so as to change the positional relationship between the objective lens 11 and the optical disc 50 based on the signal output from the digital signal control unit 20.
  • FIG. 3 is a cross-sectional view of the optical disc according to the present embodiment.
  • a recordable Blu-ray disc for example, BD-R (Blu-ray Disc Recordable) or the like
  • FIG. 3 the scales of the respective layers and members are made different from each other in order to make each layer and each member recognizable on the drawing (the same applies to FIG. 4).
  • an optical disc 50 includes a reflective film layer 54 laminated on one surface of a substrate 53, a data recording layer 55 laminated on the reflective film layer 54, and a data recording layer 55.
  • a cover layer 59 is a cover layer 59.
  • the surface of the cover layer 56 opposite to the surface facing the substrate 53 is the data surface 51
  • the surface of the cover layer 59 opposite to the surface facing the substrate 53 is the label surface 52.
  • the distance between the data surface 51 and the label surface 52 is, for example, 1.2 mm.
  • a BCA 55a in which BCA information is recorded is disposed near the center of the optical disc 50.
  • most of the data recording layer 55 is formed with a land / groove structure 55b.
  • a BCA 58a in which BCA information is recorded is disposed near the center of the optical disc 50.
  • all optical discs capable of detecting BCA by irradiating a light beam on the label surface side can draw visible images such as characters and designs on the label surface with an optical laser.
  • a visible image cannot be drawn by the optical laser on the label surface of the optical disc that does not have the BCA 58a.
  • Label Flash registered trademark
  • a DVD having a thickness of 1.2 mm is configured by bonding two 0.6 mm (millimeter) thickness disks to each other (see FIG. 4).
  • the DVD 600 includes (i) a reflective film layer 640, a data recording layer 650 laminated on the reflective film layer 640, and a cover layer 660 laminated on the data recording layer 650. (Ii) a reflective film layer 670, a drawing layer 680 laminated on the reflective film layer 670, and a cover layer 690 laminated on the drawing layer 680. Are formed by being bonded to each other via a bonding layer 630.
  • the drawing layer 680 in the vicinity of the center of the DVD 600, for example, information indicating that the DVD 600 is an optical disk that can be drawn on a label surface has a CD track pitch (1.6 ⁇ m (micrometer)).
  • the area 681 recorded in () is arranged.
  • the inventor of the present application newly specified the optical disk 50 shown in FIG. 3 as an optical disk that can be drawn on the label surface.
  • the optical disc 50 may be provided with a bar code indicating the same information as the information recorded on the BCA 58a instead of or in addition to the BCA 58a.
  • the CPU 38 of the disk device 100 determines whether or not an optical disk is held in the disk device 100 (step S101). When it is determined that the optical disk is not held (step S101: No), the CPU 38 executes the process of step S101.
  • step S101 when it is determined that the optical disk is held (step S101: Yes), the CPU 38 determines that the held optical disk is BD-R, BD-RE (Blu-ray Disc Rewritable), and BD-ROM (Blu-ROM). It is determined whether or not the surface of the optical disc irradiated with the optical laser is a data recording surface (step S102).
  • Whether it is the data recording surface or not may be determined by, for example, whether a wobble signal is detected, whether the intensity of reflected light reflected by the optical disk is higher than a predetermined intensity, or the like.
  • step S102: No the CPU 38 ends the process once.
  • the CPU 38 holds the held optical disc.
  • the thread driver 34, the focusing driver 35, and the tracking driver 36 are controlled via the digital signal control unit 20 so as to read the BCA data recorded in the BCA of the optical disc (step S103).
  • the CPU 38 determines whether or not the serial number included in the read BCA data is within a predetermined range (step S104).
  • the CPU 38 reads It is determined whether or not the serial number included in the BCA data starts from “9”. At this time, the CPU 38 typically confirms a DMC (Disc Manufacturer Code) in addition to the serial number.
  • DMC Disc Manufacturer Code
  • step S104: No If it is determined that the serial number included in the read BCA data is not within a predetermined range (step S104: No), the CPU 38 once ends the process. On the other hand, when it is determined that the serial number included in the read BCA data is within a predetermined range (step S104: Yes), the CPU 38 displays the optical disk on the label surface by a light laser. Is determined to be an optical disc that can be drawn (step S105).
  • the CPU 38 notifies the user that the optical disk held in the disk device 100 is an optical disk capable of drawing a visible image on the label surface with an optical laser (step S106).
  • the audio & video controller 280 of the audio visual apparatus 500 displays on the screen that the optical disk held in the disk apparatus 100 is an optical disk that can draw a visible image on the label surface with an optical laser.
  • a signal is transmitted to the television 300.
  • the CPU 38 further draws a visible image on the label surface, information recorded on the data recording surface of the optical disk currently held, information stored in the hard disk drive 240 of the audio visual device 500.
  • EPG Electronic Program Guide
  • step S106 a user who has been notified that the held optical disk is an optical disk capable of drawing a visible image on the label surface, moves the held optical disk from the disk device 100.
  • the operation of the disc apparatus 100 when it is once taken out and set to the disc apparatus 100 again so that the label surface of the optical disc is on the optical pickup 10 side will be described with reference to the flowchart of FIG.
  • the CPU 38 determines whether or not an optical disk is held in the disk device 100 (step S201). When it is determined that the optical disk is not held (step S201: No), the CPU 38 executes the process of step S101.
  • step S201 when it is determined that the optical disk is held (step S201: Yes), the CPU 38 determines whether the surface of the held optical disk irradiated with the optical laser is a label surface (step S202). ). When it is determined that the surface irradiated with the optical laser is not a label surface (step S202: No), the CPU 38 once ends the process.
  • step S202 when it is determined that the surface irradiated with the optical laser is the label surface (step S202: Yes), the CPU 38 determines whether or not BCA exists on the label surface (step S203).
  • whether or not it is a label surface may be determined, for example, as follows. A signal output from the light receiving element 13 or the like when an optical laser is irradiated on the label surface will be described with reference to FIG.
  • FIG. 7 is an example of an output signal output when the thickness of the cover layer 59 of the optical disc 50 (see FIG. 3) is 100 ⁇ m.
  • signals s1, s2, and s3 are a “focus error signal”, a “total received light amount”, and a “lens actuator drive signal”, respectively.
  • the reflected light reflected by the label surface 52 of the optical disc 50 is detected before and after time t1
  • the reflected light reflected by the drawing layer 58 of the optical disc 50 is detected before and after time t2.
  • the peak amplitude of the detected signal differs depending on the thickness of the cover layer 59 of the optical disc 50.
  • the peak amplitude when the reflected light reflected by the drawing layer 58 of the optical disc 50 is detected and the peak amplitude when the reflected light reflected by the data recording layer 55 of the optical disc 50 is detected are notable. It has been found by the inventor's research that there is a difference. Therefore, if the peak amplitude is compared with the predetermined threshold value, it can be determined relatively easily whether or not the label surface is reached.
  • step S203 determines that there is no BCA (step S203: No).
  • step S203: Yes the CPU 38 determines that the optical disk is an optical disk that can draw a visible image on the label surface with an optical laser (step S204).
  • the “CPU 38” according to the present embodiment is an example of the “disk discriminating device”, “reading unit”, “determination unit”, and “notification unit” according to the present invention.
  • “Disk device 100”, “data surface 51”, and “BCA 58a” according to the present embodiment are examples of “disk device”, “data recording surface”, and “unique information” according to the present invention, respectively.
  • step S102 determines in the process of step S102 described above (see FIG. 5) that the held optical disk is any one of BD-R, BD-RE, and BD-ROM and is a data recording surface.
  • the CPU 38 controls the thread driver 34, the focusing driver 35, and the tracking driver 36 via the digital signal control unit 20 so as to read the emergency break information of the held optical disc (step S102: Yes). Step S301).
  • the CPU 38 puts the held optical disc on the label surface of the optical disc. It is determined whether or not the optical disk is capable of drawing a visible image (step S302). When it is determined that the optical disk is not capable of drawing a visible image on the label surface (step S302: No), the CPU 38 once ends the process.
  • step S302 when it is determined that the optical disk is capable of drawing a visible image on the label surface (step S302: Yes), the CPU 38 is an optical disk capable of drawing a visible image on the label surface with an optical laser. (Step S303).
  • the CPU 38 determines whether or not the disc device 100 can draw a visible image on the label surface of the optical disc based on the read Emergency Break information (step S304).
  • step S304 When it is determined that the disk device 100 can draw a visible image on the label surface of the optical disk (step S304: Yes), the CPU 38 detects that the optical disk held by the disk device 100 is an optical laser on the label surface. Thus, the user is notified that the visible image can be drawn on the label surface of the optical disc by the disc device 100 (step S305).
  • step S304 when it is determined that the disk device 100 cannot draw a visible image on the label surface of the optical disk (step S304: No), the CPU 38 detects that the optical disk held in the disk device 100 is an optical laser on the label surface. However, the disc apparatus 100 notifies the user that the visible image cannot be drawn on the label surface of the optical disc (step S306).
  • the “Emergency Break information” according to the present embodiment is another example of the “unique information” according to the present invention.
  • a third embodiment according to the disk discriminating apparatus of the present invention will be described with reference to FIG.
  • the configuration is the same as that of the first embodiment, except that the disc discrimination process is partially different. Accordingly, the description of the third embodiment that is the same as that of the first embodiment is omitted, and common portions in the drawing are denoted by the same reference numerals, and only the differences are basically referred to the flowchart of FIG. To explain.
  • step S401 the CPU 38 stores the serial number and DMC that are the same as the serial number and DMC recorded in the BCA, for example, in a memory (not shown) or the like. It is determined whether it has been performed (step S401).
  • the CPU 38 is the optical disk currently held in the disk device 100. Is determined to be an optical disc on which a visible image has been previously drawn on the label surface in the disc device 100, and a visible image has been previously drawn on the label surface and / or when a visible image is drawn on the label surface.
  • the user is notified that the information recorded on the data recording surface of the optical disc currently held, the information stored in the hard disk drive 240 of the audio visual device 500, EPG, etc. can be used (step S402).
  • step S402: No when it is determined that the serial number recorded in the BCA and the same serial number and DMC as the DMC are not stored in the memory or the like (step S402: No), the CPU 38 ends the process once.

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  • Optical Recording Or Reproduction (AREA)

Abstract

L'invention concerne un dispositif de détermination de disque (28) dans un dispositif à disque (100) pourvu d'un capteur optique (10) capable de projeter un faisceau laser sur un disque optique (50) qui comprend une surface d'enregistrement de données (51) et une surface d'étiquette (52) sur des côtés opposés l'un à l'autre. Ce dispositif de détermination de disque comprend : un moyen de lecture (38) et un moyen de détermination (38). Si un disque optique dans le dispositif à disque est orienté de sorte que la surface d'enregistrement de données de celui-ci se situe du côté où se trouve le capteur optique, le moyen de lecture lit des informations uniques qui sont enregistrées sur ladite surface d'enregistrement de données et sont propres audit disque optique. Conformément aux informations uniques lues, le moyen de détermination détermine si oui ou non le disque optique dans le dispositif à disque est un disque qui permet d'effectuer un traçage sur sa surface d'étiquette.
PCT/JP2011/066739 2011-07-22 2011-07-22 Dispositif et procédé de détermination de disque, programme informatique, dispositif à disque et dispositif audiovisuel WO2013014726A1 (fr)

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PCT/JP2011/066739 WO2013014726A1 (fr) 2011-07-22 2011-07-22 Dispositif et procédé de détermination de disque, programme informatique, dispositif à disque et dispositif audiovisuel

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PCT/JP2011/066739 WO2013014726A1 (fr) 2011-07-22 2011-07-22 Dispositif et procédé de détermination de disque, programme informatique, dispositif à disque et dispositif audiovisuel

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003242669A (ja) * 2002-02-15 2003-08-29 Yamaha Corp 光ディスク装置、フォーカス制御方法およびプログラム
JP2005050409A (ja) * 2003-07-30 2005-02-24 Yamaha Corp 光ディスク装置
JP2007102855A (ja) * 2005-09-30 2007-04-19 Yamaha Corp 光ディスク処理装置
JP2008004243A (ja) * 2006-06-26 2008-01-10 Yamaha Corp 光ディスク描画方法および光ディスク装置並びに光ディスク記録媒体
JP2008117501A (ja) * 2006-11-08 2008-05-22 Matsushita Electric Ind Co Ltd 光ディスク装置及びそのレーザ光受光方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003242669A (ja) * 2002-02-15 2003-08-29 Yamaha Corp 光ディスク装置、フォーカス制御方法およびプログラム
JP2005050409A (ja) * 2003-07-30 2005-02-24 Yamaha Corp 光ディスク装置
JP2007102855A (ja) * 2005-09-30 2007-04-19 Yamaha Corp 光ディスク処理装置
JP2008004243A (ja) * 2006-06-26 2008-01-10 Yamaha Corp 光ディスク描画方法および光ディスク装置並びに光ディスク記録媒体
JP2008117501A (ja) * 2006-11-08 2008-05-22 Matsushita Electric Ind Co Ltd 光ディスク装置及びそのレーザ光受光方法

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