WO2003088236A1 - Memoire optique, et procede de lecture-ecriture sur support optique - Google Patents
Memoire optique, et procede de lecture-ecriture sur support optique Download PDFInfo
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- WO2003088236A1 WO2003088236A1 PCT/JP2002/003712 JP0203712W WO03088236A1 WO 2003088236 A1 WO2003088236 A1 WO 2003088236A1 JP 0203712 W JP0203712 W JP 0203712W WO 03088236 A1 WO03088236 A1 WO 03088236A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
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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
- G11B7/0079—Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10595—Control of operating function
- G11B11/10597—Adaptations for transducing various formats on the same or different carriers
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/10515—Reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/10517—Overwriting or erasing
- G11B11/10519—Direct overwriting, i.e. performing erasing and recording using the same transducing means
- G11B11/10521—Direct overwriting, i.e. performing erasing and recording using the same transducing means using a single light spot
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10546—Audio or video recording specifically adapted for audio data
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
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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
- G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
- G11B2020/10953—Concurrent recording or playback of different streams or files
- G11B2020/10962—Concurrent recording or playback of different streams or files wherein both recording and playback take place simultaneously
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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
- G11B2020/1259—Formatting, e.g. arrangement of data block or words on the record carriers on discs with ROM/RAM areas
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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
- G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
- G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
- G11B2020/1287—Synchronisation pattern, e.g. VCO fields
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- 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
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
- G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
- G11B2020/1461—8 to 14 modulation, e.g. the EFM code used on CDs or mini-discs
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- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
- G11B2020/1843—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information using a cyclic redundancy check [CRC]
Definitions
- the present invention relates to an optical storage device that optically records and reproduces data on and from an optical recording medium and a method for reading / writing the optical storage medium.
- the present invention relates to a ROM (Read Only Memory) and a RAM (Random Acces
- the present invention relates to an optical storage device and a method for reading / writing data from / to an optical storage medium, which perform recording while reproducing using an optical recording medium having both functions of the storage device.
- Such an optical information recording medium capable of simultaneous reproduction by ROM-RAM can obtain twice the storage capacity of a normal optical disk memory, and can simultaneously reproduce ROM-RAM, which is impossible with a magnetic disk. It has the characteristic.
- an optical information recording medium in which a magneto-optical recording film is formed on an optically transparent substrate in which spiral or concentric phase pits are formed. Then, the light from the optical pickup is condensed to almost the diffraction limit, irradiated on the optical information recording medium, and the light intensity modulated by the phase pits from the light returned from the optical information recording medium is reproduced as a ROM signal and returned. The differential amplitude of the polarization direction component modulated from the light by the magneto-optical recording film is reproduced as a RAM signal.
- a magnetic head for applying a magnetic field to the optical information recording medium is provided on the optical pickup.
- the RAM signal is recorded on the magneto-optical recording film by changing at least one of the condensed light from the optical pickup and the magnetic field.
- ROM and RAM can be simultaneously reproduced with one optical pickup, and the ROM can be recorded in the RAM while being reproduced.
- ROM information such as music and video information
- music and video (scenery, maps, etc.) recorded as ROM information such as CDs (Compact Disks)
- CDs Compact Disks
- the music and video (landscapes, maps, etc.) recorded as RAM information may be played back without interruption, and the sound of musical instruments, new maps, and road information may be recorded in RAM.
- the conventional technology alone records the RAM information in a predetermined relationship in which the reproduced ROM information and the recorded RAM information are linked, even if the ROM can be recorded while reproducing the ROM. It is difficult.
- ROM and RAM can be reproduced at the same time, but at the time of simultaneous reproduction, there is a problem that recording to RAM cannot be performed.
- a user can input information without delay and record it on an optical information recording medium while reproducing ROM information or already recorded RAM information. Disclosure of the invention
- an object of the present invention is to provide an optical storage medium for recording new information related to ROM information in a position linked to the ROM information in a RAM while continuously reproducing the ROM information of the optical storage medium. It is an object of the present invention to provide a method for reading / writing a storage device and an optical storage medium.
- Another object of the present invention is to provide an optical storage device and an optical storage device for recording new information on an optical storage medium while continuously reproducing the ROM information and the RAM information of the optical storage medium. It is an object of the present invention to provide a method for reading / writing a medium. Further, another object of the present invention is to provide an optical storage device and an optical storage medium for RAM recording new stream information on an optical storage medium while continuously reproducing the stream information of the optical storage medium. It is an object of the present invention to provide a method for reading / writing data.
- an optical storage device of the present invention is directed to irradiating an optical information recording medium having a magneto-optical recording film formed on a substrate on which phase bits are formed, with light, From the return light from the information recording medium, the light intensity modulated by the phase pit is detected as an R0M signal, and the return light is subjected to the differential amplitude of the polarization direction component modulated by the magneto-optical recording film.
- a magnetic field applying unit for applying a magnetic field to an information recording medium for recording on the magneto-optical recording film, and at least the optical head It has a track record for accessing a desired position of the optical information recording medium.
- the storage device comprises: a read buffer memory for storing at least the detected R0M signal; a write buffer memory for storing an input signal to be written to the magneto-optical recording film; and a reference information reproduction.
- the ROM signal is read at least n (n> 2) times the speed V, stored in the read buffer memory, and the stored information is output at the information reproduction speed V.
- the temporal relationship between the output information and the input information is managed so as to be linked.
- the read buffer memory includes an R0M signal read buffer memory that stores the ROM signal, and a RAM signal read buffer memory that stores the RAM signal.
- a computing unit for computing information from the two buffer memories for reading.
- At least one or more buffer memories of the ROM signal reading buffer memory and the RAM signal writing buffer memory are composed of two internal buffer memories and a switch.
- the switch switches the switch and stores the data in the other internal buffer memory.
- the magnetic field applying unit moves together with the optical head, applies a modulation magnetic field to a position where the optical head condenses light, and performs overwrite recording. Consists of a magnetic head.
- the reading of the information and the recording of the information are performed with n ⁇ 4.
- the controller performs overwrite recording by modulating the irradiation power of the optical head.
- the controller reads the magneto-optical recording film in the same RAM format as the ROM format by the phase pits of the optical information recording medium, Write control.
- the ROM signal and the RAM signal are simultaneously read at high speed, the read information is stored in the buffer memory, and the information is reproduced from the buffer memory at the reference speed. Furthermore, the ROM information and the input information from the link user are stored in a buffer memory, and are recorded as a RAM signal at high speed.
- the above problem can be solved by reading out the ROM signal and the RAM signal at n times speed when n> 2 is a positive number and performing recording on the RAM signal at n times speed.
- it is necessary to access the optical pickup to a desired position before the reading of the ROM and RAM signals and the recording to the RAM signals.
- the buffer memory can be increased without increasing the size. Solvable.
- smooth recording and reproduction of information can be realized by recording a RAM signal directly by a magnetic field modulation method without erasing operation while irradiating light with a constant average power.
- magneto-optical recording film of the RAM for optical modulation overwriting, it is possible to record information even on a disk having an uneven label on the uppermost surface of the optical disk medium.
- FIG. 1 is a plan view of a magneto-optical disk as an example of an optical information recording medium used in an embodiment of the present invention.
- FIG. 2 is a sectional view of a R 0 M- RAM magneto-optical disc memory shown in FIG. 1 c
- FIG. 3 is a plan view illustrating a recording state of ROM information and RAM information in the optical information recording medium having the structure of FIG.
- FIG. 4 is a perspective view illustrating a recording state of ROM information and RAM information in the optical information recording medium having the structure of FIG.
- FIG. 5 is a cross-sectional configuration diagram of an optical information recording medium according to another embodiment of the present invention.
- FIG. 6 is an overall block diagram of a configuration of an embodiment of the optical storage device of the present invention.
- FIG. 7 is a detailed view of the optical system of the optical pickup shown in FIG.
- FIG. 8 is a partial detailed block diagram of FIG.
- FIG. 9 is a layout diagram of the optical detectors of FIGS. 7 and 8.
- Fig. 10 shows the relationship between the output of the optical detector of Fig. 9 and the focus error (FES) detection, track error (TES) detection, MO signal and LD feedback signal based on the output. It is.
- FIG. 11 is a diagram showing combinations of detection of ROM and RAM in each of the reproduction and recording modes in the main controller of FIGS. 6 and 8.
- FIG. 12 is a configuration diagram of the read / write system of FIG.
- FIG. 13 is a time chart of the read / write operation of FIG.
- FIG. 14 is an arrangement diagram of a cluster of the disks in FIG.
- FIG. 15 is a diagram showing a modulation method of the RAM and ROM signals of FIG.
- FIG. 16 is a diagram illustrating a magnetic field modulation recording method in the recording of FIG.
- FIG. 17 is another cluster layout diagram of the disk in FIG.
- FIG. 18 is an explanatory diagram of an optical modulation overwrite recording method in another recording of FIG.
- FIG. 19 is a block diagram of another embodiment of the read / write system of the present invention.
- FIG. 20 is a configuration diagram of the Q channel for CD for explaining the operation of FIG.
- FIG. 21 is an explanatory diagram of the flow of read / write in the Q channel data of FIG. 19 c. Best mode for carrying out the invention
- FIG. 1 is a plan view of an R 0 M—RAM optical recording medium according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view thereof
- FIG. 3 is a front view of a user area
- FIG. FIG. 5 is a diagram showing a relationship between a signal and a RAM signal according to another embodiment of the present invention.
- FIG. 2 is a sectional view of an M optical recording medium.
- a ROM-RAM magneto-optical disk (MO) will be described as an example of a ROM-RAM optical recording medium.
- the magneto-optical disk 4 of the ISO standard has a disk shape, with the lead-in area 1 at the innermost circumference, the lead-out area 2 at the outermost circumference, and the user Area 3 is provided.
- the lead-in area 1 and the lead-out area 2 are R0M information composed of phase pits formed by irregularities of the disk on the polycarbonate substrate, and record information such as specifications of the disk. By reading this, the recording and playback conditions are controlled.
- the optical depth (pit depth) of the phase pits serving as the ROM information is set so that the light intensity modulation during reproduction is maximized. Typically 70% or more modulation depth
- a user area 3 where a magneto-optical recording film is formed by a sputtering apparatus is provided. In this user area 3, the user can freely record and reproduce information.
- the structure of the magneto-optical disk 4 for providing the user area 3 with the functions of ROM and RAM consists of a first dielectric material made of silicon nitride, tantalum oxide or the like on a polycarbonate substrate 4A.
- a reflective layer 4E made of such a metal and a protective coat layer 4F made of a UV-curable resin are used.
- the ROM function is given by the phase pits PP formed in the disk 4 unevenly
- the RAM function is given by the magneto-optical recording layer 4C.
- the recording on the magneto-optical recording layer 4C is performed by heating the laser beam on the magneto-optical recording layer 4C, assisting the magnetization reversal, and reversing the magnetization direction in accordance with the signal magnetic field, thereby recording the magneto-optical signal OMM. I do. This Thereby, recording of RAM information is possible.
- the polarization plane of the laser beam changes as much as possible according to the magnetization direction of the recording layer 4C.
- the presence or absence of a signal is determined based on the intensity of the polarization component of the reflected light at this time.
- the reflected light is modulated by the phase pits PP constituting the ROM, so that the reading of the ROM information can be performed at the same time.
- ROM information is fixedly recorded by uneven phase pits PP formed on a flat substrate, and RAM information is recorded by a series of phase pits PP.
- the M0 signal is recorded as 0 MM on the magneto-optical recording layer.
- the cross section along the line AB in the radial direction in FIG. 3 corresponds to FIG. That is, ROM and RAM can be reproduced simultaneously by one optical pickup, and if magnetic field modulation type magneto-optical recording is adopted, writing to RAM and reproduction of ROM can be performed simultaneously.
- FIG. 5 is a sectional view of another magneto-optical disk suitable for optical modulation recording.
- a label layer 4G is provided on the uppermost surface, and the magneto-optical recording layer 4 has an initialization layer 4C1, a switch layer 4C2, a recording layer 4C3, It is composed of an intermediate layer 4C4 and a reproduction layer 4C5.
- the RAM information is recorded by direct overwrite by the magnetic field modulation recording method.
- RAM information is recorded by the optical modulation recording method.
- consumer optical information recording media are often printed with a 4G label for displaying information related to the title and content of the product.
- Such a label 4G generally has irregularities of several tens of / zm, and when performing magnetic field modulation recording, there is a problem of singing with a magnetic head. Therefore, recording is performed using the optical modulation overwrite medium shown in FIG.
- FIG. 6 is an overall block diagram of an optical disk drive according to an embodiment of the present invention
- FIG. Fig. 8 is a block diagram of the signal processing system of the drive in Fig. 6
- Fig. 9 is a layout diagram of the detectors in Figs. 7 and 8
- Fig. 10 is the output and generated signals of the detectors.
- FIG. 11 is an explanatory diagram of each mode of the optical disk drive.
- the motor 18 rotates the optical information recording medium (MO disk) 4.
- the MO disk 4 is a removable medium, and is inserted from a drive opening (not shown).
- the optical pickup 5 has a magnetic head 35 and an optical head 7 arranged so as to sandwich the optical information recording medium 4.
- the optical pickup 5 is moved by a track actuator 6 such as a pole screw feed mechanism, and can access an arbitrary position in the radial direction of the optical information recording medium 4. Further, an LD driver 31 for driving the laser diode LD of the optical head 7 and a magnetic head drino 34 for driving the magnetic head 35 of the optical pickup 5 are provided.
- the access servo controller 15-2 uses the output from the optical head 7 to control the track actuator 6, the motor 18, and the focus actuator 19 of the optical head 7. Control the servo.
- the controller 15-1 operates the LD driver 31, the magnetic head driver 34, and the access servo controller 15-2 to record and reproduce information.
- the diffused light from the laser diode LD passes through the three-beam tracking diffraction grating 10 and the beam splitter 11 to become collimated light by the collimating lens 39, and after being reflected by the mirror 40 The light is focused on the optical information recording medium 4 to almost the diffraction limit by the lens 16.
- Part of the light incident on the beam splitter 11 is reflected by the beam splitter 11 and condensed on an APC (Auto Power Control) detector 13 via a condenser lens 12.
- APC Auto Power Control
- the light reflected from the optical information recording medium 4 passes through the objective lens 16 again, is reflected by the mirror 140, becomes convergent light by the collimating lens 39, and is incident again on the beam splitter 11 I do.
- Part of the light that has re-entered the beam splitter 11 returns to the laser diode LD side, and the rest of the light is reflected by the beam splitter 11 1 to form a three-beam Wollaston prism 26, a cylindrical surface.
- the light is focused on the reflected light detector 25 through the lens 21.
- the shape and arrangement of the reflected light detector 25 will be described. Since the reflected light detector 25 has three beams of incident light, as shown in FIG. 9, the four-split detector 22-1, the MO signal detectors 20 arranged above and below the detector, and the tones arranged on the left and right sides thereof. It consists of rack error detectors 22-2 and 22-3.
- the FES (Focus Error Signal) reproducing circuit 23 uses the outputs A, B, C, and D of the photoelectrically converted four-segment photodetector 22 to obtain focus error by the astigmatism method shown in FIG. Perform detection (FES). That is,
- the track error detection (TES) is performed by the push-pull TES generation circuit 24 from the output E and F of the track detection detectors 22-2 and 22-3 using the calculation formula in Fig. 10.
- the focus error signal (FES) and track error signal (TES) obtained by these calculations are used as the position error signal in the focus direction and track direction as the main controller 15 (in FIG. 6, the access servo controller 15—
- thermocontroller 15-2 and the controller 15-1 are shown by an integrated main controller 15.
- the polarization characteristics of the reflected laser light which changes depending on the direction of magnetization of magneto-optical recording on the optical information recording medium 4, are converted into light intensity. That is,
- the light is separated into two beams whose polarization directions are orthogonal to each other by polarization detection, and is incident on the two-segment photodetector 20 through the cylindrical lens 21 and is photoelectrically converted.
- the main controller 15 converts the reflected light of the semiconductor laser diode LD incident on the APC photodetector 13 into a photoelectric signal. Input as the second ROM signal (ROM2).
- the main controller 15 includes the first ROM signal (ROM l) output from the addition amplifier 29, the RAM signal (RAM) output from the differential amplifier 30, and the FES generation.
- the focus error signal (FES) from the circuit 23 and the track error signal (TES) from the TES generation circuit 24 are input.
- recording data and read data are input / output to / from the main controller 15 through the interface circuit 33 with the data source 32.
- the main controller 15 generates a command signal to the LD driver 31 according to each mode.
- the LD driver 31 receives the first ROM signal (R
- OM 1 G + H
- RAM magneto-optical
- data from the data source 32 is input to the main controller 15 through the interface 33 (see FIG. 8).
- the main controller 15 supplies the input data to the magnetic head driver 34 when the magnetic field modulation recording method is used.
- the magnetic head driver 34 drives the magnetic head 35 and modulates a magnetic field in accordance with recording data.
- the main controller 15 sends a signal indicating recording to the LD driver 31.
- this input data is sent to the LD driver 31 to drive the laser diode LD with light modulation.
- the main controller 1 the LD driver 31 to drive the laser diode LD with light modulation.
- the focusing error signal is detected by the astigmatism method
- the tracking error signal is detected by the 3-beam method
- the MO signal is detected from the differential detection signal of the polarization component.
- the main controller 15 (the servo controller 15-2 in FIG. 6) drives the focus actuator 19 in response to the detected focus error signal FES, and combines the light beams. Focus control.
- the main controller 15 (servo controller 15-2 in FIG. 6) drives the track actuator 6 in response to the detected track error signal TES, and performs seek and track following control of the light beam.
- the G + H signal of the detector 25 or the I signal of the detector 13 is used for laser power adjustment.
- the present invention provides a RAM recording mechanism linked to ROM / RAM playback.
- FIG. 12 is a block diagram of the read / write mechanism of the present invention
- FIG. 13 is an explanatory diagram of the recording / reproducing process
- FIG. 14 is a layout diagram of ROM and RAM classes on a disk
- FIG. 16 is an explanatory diagram of a magnetic field modulation recording method.
- the same components as those shown in FIGS. 6 and 8 are denoted by the same symbols. That is, the optical pickup 5, the LD driver 31, and the magnetic head shown in FIG. In addition to the configuration of the driver 34, access servo controller 15-2, and main controller 15-1, it has an encoder 50, a decoder 52, 54, a computing unit 56, and buffer memories 51, 53, 55.
- the encoder 50 encodes the external input data into an NRZI signal suitable for magneto-optical (RAM) recording described later.
- the RAM recording buffer 51 is a speed conversion buffer for input data and converts the data to a speed n times the transfer speed V for input data.
- the R0M signal decoder 52 decodes the R0M signal (EFM signal) read in the optical view 5 into an output signal.
- the ROM reproduction buffer 53 is a speed conversion buffer for the output data, and converts the output data to a transfer speed 1 / n times the transfer speed nV.
- the RAM signal decoder 55 decodes an NRZ I signal read by the optical pickup 5 and suitable for magneto-optical (RAM) recording described later.
- the RAM playback buffer 55 is a speed conversion buffer for the output data, and converts the data transfer speed to 1 / n times the data transfer speed nV.
- the computing unit 56 is composed of, for example, a mixing circuit, computes the read ROM signal and RAM signal, and outputs the result to the outside.
- Each buffer memory 51, 53, 55 is subdivided into two buffer memories 5, 6, 1, 2, 3, and 4.
- switch circuits SW1, SW2, and SW2 are switched to the other. It has SW3, SW4, SW5 and SW6. Even if the internal structure of the buffer memory is not subdivided, it is possible to make the contents of the buffer memory first-in first-out, but the configuration becomes complicated.
- both the ROM section and the RAM section are in the CDROM format, and the block address positions of the ROM and RAM are set for convenience.
- the basic unit for actual recording and playback can be a block unit. In this embodiment, five blocks are defined as one cluster, which is the basic unit for recording and playback, for one block of 98C D frame.
- the buffer 55 and the amount of data stored in the RAM recording buffer 51 are shown.
- Each buffer memory has a buffer memory divided into two as an internal structure, and is stored in the other buffer memory when one reaches one minute.
- the controller 15-1 rotates the motor 18 for rotating the optical information storage medium 4 at n (here, 4) times the speed of the optical information storage medium 4 with respect to the reference information reproducing speed V, and records the optical information with the optical pickup 5.
- the ROM signal and the RAM signal of the medium 4 are read at n times the reproduction speed V, and stored in the buffer memory 53 for reading the ROM signal and the buffer memory 55 for reading the RAM signal. Then, the controller 15-1 reads the information stored in the memory 53, 55 at the reproduction speed V, outputs the information to the arithmetic unit 56, and outputs the information from the output interface.
- the controller 15-1 stores the information input at the speed V from the input interface in the RAM signal write buffer memory 51.
- the optical pickup 5 and the temporal relationship between the output information and the input information substantially match.
- the RAM address position managed as described above is accessed, and the information from the RAM signal writing buffer memory 51 is recorded as a RAM signal on the optical information recording medium 4 at n times the reproduction speed V.
- the internal structures of the ROM signal reading buffer memory 53, the RAM signal reading buffer memory 55, and the RAM signal writing buffer memory 51 are composed of two internal buffer memories and a switch, and one internal buffer memory is used as a reference. When the capacity is reached, the switch is switched and stored in the other internal buffer memory. For this reason, while playing ROM and RAM data without interruption, RA
- the data can be mixed and output.
- recording and reproduction can be performed without delay while outputting and inputting information linked at 1 ⁇ speed.
- n> 2 the time available for accessing the optical pickup must be double the time after the decimal point, and the recording and playback speed should be 4 times or more.
- the optical pickup 5 reads the ROM and RAM class at position n, stores them in buffers 1 and 3, and after reading, outputs the playback signal corresponding to class n position n to the outside. .
- the class position n + 1 following the cluster position n is read at quadruple speed and stored in buffers 2 and 4.
- the input data is input to the buffer 5 in accordance with the output of the reproduction signal of the buffer 1.
- the output of the playback signal of buffer 1 ends, the input data corresponding to the playback signal of buffer 1 is recorded at cluster position n of the RAM.
- the position of the optical pickup 5 is n + 1. Therefore, before the output of the reproduction signal of the buffer 1 is completed, the optical pickup 5 accesses the position n and writes the input cluster from the position n for rotation waiting or track jump from the position n for writing. During this writing, the reproduction signal of the buffer 2 is output, so that the reproduction signal is not interrupted.
- the optical pickup 5 is moved to the ROM and RAM class at the position n + 2. Is read and stored in buffers 1 and 3.
- the reading, reproducing, and writing sequences are similarly executed.
- the read / read / access / write / access sequence is performed, and overwrite to RAM can be realized while simultaneously playing ROM-RAM at 4 ⁇ speed.
- ROM-RAM ROM-RAM
- FIG. 16 consider the case where recording is performed by the magnetic field modulation recording method that modulates the applied magnetic field intensity without modulating the light irradiation intensity.
- R The modulation method used for recording the OM signal is EFM (Eight to Fourteen Modulation), and the modulation method for RAM data to be used for magneto-optical recording is NR ZI (Nonreturn-to-Zero change-on-Ones recording). Assumed 0
- EFM IB in Fig. 1
- Tmin 1.41 T and Tw 2 0.47 T.
- the semiconductor laser diode LD can emit light by a pulse, and the applied magnetic field can be changed in accordance with a signal.
- the arrow shape of the recording mark is reduced compared to the case where recording is performed by continuously emitting the semiconductor laser diode LD. Therefore, the characteristics of the reproduced signal can be improved by relaxing the arrow-shaped recording marks.
- FIG. 17 is an arrangement diagram of another class of the optical information recording medium of the present invention.
- both the ROM section and the RAM section are in the CDROM format, and the block address positions of the ROM and the RAM are combined for convenience.
- the physical arrangement of the class is shifted between ROM and RAM. Even in this case, as in the processing in FIG. 13, reproduction and recording that match the class address at the same address can be performed.
- the cluster position is physically and logically identical between the ROM and the RAM at the stage of manufacturing the medium. However, they may be physically close. However, it is necessary to match the logical positional relationship in file management.
- FIG. 14 is an arrangement diagram of another class of the optical information recording medium of the present invention.
- FIG. 14 both the ROM section and the RAM section are in the CDROM format, and the block address positions of the ROM and the RAM are combined for convenience.
- the physical arrangement of the class is shifted between ROM and RAM. Even in this case, as in the processing in FIG. 13, reproduction and recording that match the class address at
- FIG. 18 is an explanatory diagram of the applied magnetic field and the light irradiation intensity when recording is performed using the optical modulation overwrite medium shown in FIG.
- the output and input of the signal are the same.
- the timing of optical reading and writing on the optical storage medium is shifted from each other, and as shown in Fig. 18, the light irradiation intensity is modulated under the application of a constant magnetic field to change the RAM signal. Can also be recorded. Since the magnetic field is not AC-modulated, it can be arranged with sufficient space for the optical information recording medium.
- FIG. 19 is a block diagram of another read / write mechanism in the optical storage device of the present invention.
- FIG. 20 is an explanatory diagram of the Q channel used for this.
- FIG. 21 is a diagram of the audio and address data of FIG. It is explanatory drawing of a flow.
- FIG. 19 the same components as those shown in FIG. 12 are denoted by the same symbols. That is, the optical pickup 5, the LD driver 31, the magnetic head driver 34, the access servo controller 15-2, and the main controller 15 shown in FIG.
- the encoder 50 supports the Q channel. Also, delay circuits 57 and 58 and a Q-channel comparator 59 are provided on the output side. That is, the Q channel used for music CDs is used as a method of linking the ROM and RAM.
- 98 frames (5 blocks) are provided with 98 channels of address information by the Q channel data (subcode) provided in the 98 frames data area. Controlled by seconds and frame numbers.
- the input data is added with the Q channel code by the encoder 50.
- the audio data is converted from analog to digital by the A / D converter 60 and then encoded by the encoder 61.
- address information (Q channel) obtained from a clock such as the evening image is encoded by the encoder 62. Both are combined by the multiplexer 63 and then subjected to EFM modulation (addition of a synchronization signal).
- the delay circuits 57 and 58 are adjusted by the controller 15-1 so as to link the ROM and RAM addresses. That is, in the decoders 52 and 54, the ROM and RAM signals from the optical disk 4 are demodulated by the synchronization detection / EFM demodulation circuit 65, and separated by the timing detection circuit 66 into audio and an address (Q channel). The separated voice and address are decoded by decoders 67 and 68, respectively, and output address information (Q channel). The decoded audio signal is converted to an analog audio signal by the D / A converter 69 and input to the buffer 53 or 55. The controller 15-1 sends the Q channel data to the Q channel comparator 59, adjusts the delay time of the ROM signal and the RAM signal by the delay circuits 57 and 58, and outputs the result to the arithmetic unit 56.
- the output side can adjust the time relationship between the R0M signal and the RAM signal so that they match. In this way, it is possible to overwrite the RAM while simultaneously reproducing the ROM and the RAM.
- the optical information recording medium in which the multilayer film including the magneto-optical recording film is formed on the transparent substrate having the phase bit has the following features.
- the present invention adds simultaneous playback at n times speed and intermittent recording using a buffer memory, so that, for example, while listening to karaoke, one's singing voice can be recorded at a linked position and played back together with the music of Raoke. Configurations are possible.
- information can be recorded and reproduced without interruption of the stream information.
- ROM reproduction and RAM recording for example, in the case of map information, a file in which address information and the like relating to information additionally added and updated are recorded in advance, and then the RAM information position corresponding to the ROM information is accessed. It is necessary to reproduce and record information at high speed, and very high access speed and transfer speed are required.
- the correspondence between the ROM and RAM addresses can be approximately 1: 1, This eliminates the need to read a file that indicates a link between ROM and RAM information, making it suitable for recording and reproducing stream information.
- the read buffer and the write buffer are described separately, it is also possible to divide the area in one buffer for read and for write. Further, the arithmetic unit does not need to be a separate circuit, but may be a program executed by a controller. Industrial applicability
- ROM-RAM Simultaneous playback of optical storage media with simultaneous playback at n times speed and intermittent recording using buffer memory are added, so that information is output at a reference speed using a single optical information storage medium. Information entered at the reference speed can be linked and recorded without delay.
- one optical information recording medium it is possible to output a signal obtained by calculating a ROM signal and a RAM signal linked to the ROM signal.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
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- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003585082A JP4053500B2 (ja) | 2002-04-15 | 2002-04-15 | 光学的記憶装置及び光学的記憶媒体の読出し/書込み方法 |
KR1020047016399A KR100636725B1 (ko) | 2002-04-15 | 2002-04-15 | 광학적 기억 장치와, 광학적 기억 매체의 판독 및 기록 방법 |
PCT/JP2002/003712 WO2003088236A1 (fr) | 2002-04-15 | 2002-04-15 | Memoire optique, et procede de lecture-ecriture sur support optique |
AU2002249593A AU2002249593A1 (en) | 2002-04-15 | 2002-04-15 | Optical storage device, and optical storage medium reading/writing method |
EP02718578A EP1498890A4 (en) | 2002-04-15 | 2002-04-15 | OPTICAL MEMORY, AND METHOD OF READING-WRITING ON OPTICAL MEDIA |
CNA02828755XA CN1625771A (zh) | 2002-04-15 | 2002-04-15 | 光学存储装置和光学存储介质的读出/写入方法 |
US10/959,715 US7301855B2 (en) | 2002-04-15 | 2004-10-06 | Apparatus and method for storing ROM and RAM data into magneto-optical recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2002/003712 WO2003088236A1 (fr) | 2002-04-15 | 2002-04-15 | Memoire optique, et procede de lecture-ecriture sur support optique |
Related Child Applications (1)
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US10/959,715 Continuation US7301855B2 (en) | 2002-04-15 | 2004-10-06 | Apparatus and method for storing ROM and RAM data into magneto-optical recording medium |
Publications (1)
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WO2003088236A1 true WO2003088236A1 (fr) | 2003-10-23 |
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PCT/JP2002/003712 WO2003088236A1 (fr) | 2002-04-15 | 2002-04-15 | Memoire optique, et procede de lecture-ecriture sur support optique |
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Country | Link |
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US (1) | US7301855B2 (ja) |
EP (1) | EP1498890A4 (ja) |
JP (1) | JP4053500B2 (ja) |
KR (1) | KR100636725B1 (ja) |
CN (1) | CN1625771A (ja) |
AU (1) | AU2002249593A1 (ja) |
WO (1) | WO2003088236A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006031925A (ja) * | 2004-07-16 | 2006-02-02 | Agency For Science Technology & Research | データ蓄積デバイス |
CN100433177C (zh) * | 2004-05-11 | 2008-11-12 | 建兴电子科技股份有限公司 | 录放影装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7688685B1 (en) * | 2000-03-01 | 2010-03-30 | Hitachi, Ltd. | Magneto-optical recording device capable of changing the shapes of heating areas |
WO2004023481A1 (ja) * | 2002-08-30 | 2004-03-18 | Fujitsu Limited | Rom−ram媒体及び、その記憶装置 |
EP1688945A1 (en) * | 2003-11-28 | 2006-08-09 | Fujitsu Limited | Optical disc and recording/reproduction device |
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JPH06195866A (ja) * | 1992-12-21 | 1994-07-15 | Victor Co Of Japan Ltd | 音響信号処理装置 |
JPH06202820A (ja) * | 1992-06-23 | 1994-07-22 | Deutsche Thomson Brandt Gmbh | Rom−ram記憶媒体を用いての情報アイテムの記録及び再生方法及び装置 |
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JPH02244445A (ja) * | 1989-03-17 | 1990-09-28 | Hitachi Ltd | 光学的情報記録媒体および光学的情報記録再生装置 |
JPH0765375A (ja) * | 1993-08-20 | 1995-03-10 | Fujitsu General Ltd | コンカレントrom/ram光ディスク装置 |
DE4341223B4 (de) | 1993-12-03 | 2010-11-18 | Deutsche Thomson-Brandt Gmbh | ROM-RAM-Disk |
JPH08195022A (ja) | 1994-11-14 | 1996-07-30 | Sega Enterp Ltd | ディスク再生装置、カラオケシステム及びディスク再生方法 |
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- 2002-04-15 JP JP2003585082A patent/JP4053500B2/ja not_active Expired - Fee Related
- 2002-04-15 CN CNA02828755XA patent/CN1625771A/zh active Pending
- 2002-04-15 EP EP02718578A patent/EP1498890A4/en not_active Withdrawn
- 2002-04-15 WO PCT/JP2002/003712 patent/WO2003088236A1/ja not_active Application Discontinuation
- 2002-04-15 AU AU2002249593A patent/AU2002249593A1/en not_active Abandoned
- 2002-04-15 KR KR1020047016399A patent/KR100636725B1/ko not_active IP Right Cessation
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JP2006031925A (ja) * | 2004-07-16 | 2006-02-02 | Agency For Science Technology & Research | データ蓄積デバイス |
Also Published As
Publication number | Publication date |
---|---|
US20050041538A1 (en) | 2005-02-24 |
CN1625771A (zh) | 2005-06-08 |
KR100636725B1 (ko) | 2006-10-23 |
JPWO2003088236A1 (ja) | 2005-08-25 |
US7301855B2 (en) | 2007-11-27 |
KR20040097354A (ko) | 2004-11-17 |
EP1498890A4 (en) | 2008-06-11 |
JP4053500B2 (ja) | 2008-02-27 |
EP1498890A1 (en) | 2005-01-19 |
AU2002249593A1 (en) | 2003-10-27 |
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