WO2004015698A1 - ディスクドライブ装置、アドレス検出方法 - Google Patents
ディスクドライブ装置、アドレス検出方法 Download PDFInfo
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- WO2004015698A1 WO2004015698A1 PCT/JP2003/010264 JP0310264W WO2004015698A1 WO 2004015698 A1 WO2004015698 A1 WO 2004015698A1 JP 0310264 W JP0310264 W JP 0310264W WO 2004015698 A1 WO2004015698 A1 WO 2004015698A1
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- Prior art keywords
- signal
- push
- pull signal
- output
- address information
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—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
-
- 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
- G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
-
- 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
-
- 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
- G11B20/14—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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
- G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
-
- 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
- G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/216—Rewritable discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/218—Write-once discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
-
- 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
- G11B7/00745—Sectoring or header formats within a track
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
-
- 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
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24082—Meandering
Definitions
- the present invention relates to a disk drive device for performing recording Z reproduction on a disk recording medium such as an optical disk, and an address detection method.
- a groove (group) is formed in advance as a pre-group and the group or land (group and
- the data track is a part with a plateau cross section sandwiched between dulls.
- the DVD (Digital Versatile Disc) DVD-R a phase-change recording rewritable disc, and the DVD-R, an organic dye changeable write-once disc, have discs as shown in FIG.
- a coupling ring G is formed, and a land pre-pit LPP is formed in a land L portion between the ring G and the group G.
- the reflected light information obtained by the wobbling group is used for controlling disk rotation and generating a master clock for recording.
- the land pre-pits are used to determine the exact recording position in bit units and to obtain various information of the disc such as pre-addresses. That is, the address indicating the physical position on the disc is recorded as a land prepit LPP.
- a disk drive device corresponding to such a disk, an address recorded on the disk, for example, as a land pre-pit LPP is read during reproduction or recording, and the position on the disk during the recording Z reproduction operation is confirmed. Or various controls.
- the land pre-pits LPP become difficult to read due to interference with pits (such as phase change pits) formed in the group. Furthermore, the land pre-pits LPP of the disc after information recording become difficult to read due to the state of the optical pickup (recording / reproducing head), for example, the position of the photodetector that detects reflected light and various aberrations.
- FIGS. 5A to 5C show readout waveforms corresponding to the land prepits LPP.
- FIG. 6 shows the data obtained by the land pre-pit LPP.
- the land pre-pits LPP are formed by notches in the land in synchronization with the wobbles as shown in FIG. 4, but three land pre-pits LPP represent one bit of address data. That is, as shown in Fig. 6, b2, bl, and b0 as three land pre-pits LPP (presence / absence) are:
- Such land pre-pit LPP information can be obtained as so-called push-pull signals as reflected light information from the disc. That is, the difference information is the difference between the left and right reflected light amounts with respect to the track line direction.
- this push-pull signal as shown in FIG. 5A, a relatively large amplitude is obtained according to the land pre-pit LPP, and the land pre-pit LPP information can be detected by detecting this amplitude. For example, by performing binarization using a predetermined threshold level, "1" or "0" can be detected as b2, b1, bO of the land prepit LPP.
- the amplitude waveform due to the land pre-pit LPP is clear as shown in the time axis direction in FIG. 5B, that is, the eye is good. Since the waveform is open to the outside, land pre-pit LPP information can be extracted properly.
- the difficulty of reading the address by the land pre-pit LPP after overnight recording is that, for example, when performing additional recording on a disc after recording or when performing a seek, the address becomes good. No longer available, which means that the operating performance is reduced.
- an object of the present invention is to enable a disk drive device to properly detect address information by land pre-pits even after data recording.
- a group is formed as a recording track, and data is recorded on a disk-shaped recording medium in which address information is recorded in pre-pits on lands between the group and the dub.
- a head means for outputting a laser for reproduction a push-pull signal generating means for generating a push-pull signal from reflected light information detected by the head means, and a binarization of the push-pull signal.
- Window generating means for generating a window signal, and integrating means for integrating the push-pull signal during a period based on the window signal; and extracting means for extracting address information based on the pre-pits from an output of the integrating means.
- a disc-shaped recording medium in which a group is formed as a recording track and address information is recorded by pre-pits on lands between the groups is:
- a push-pull signal is generated from reflected light information when laser irradiation is performed on the disc-shaped recording medium, a binarization of the push-pull signal is performed, a window signal is generated, and the window signal is generated.
- the push-pull signal is integrated during a period based on the above, and the address information based on the pre-pits is extracted from the integrated signal.
- the push-pull signal is integrated during the land pre-pit detection period by the window signal, and the land pre-pit signal is detected from the integration result.
- a clear waveform corresponding to the land pre-pit can be obtained by integrating the push-pull signal.
- FIG. 1 is a block diagram of a disk drive device according to an embodiment of the present invention.
- FIG. 2 is a block diagram of a configuration for extracting addresses by land pre-pits of the disk drive device according to the embodiment.
- 3A to 3D are explanatory diagrams of signal waveforms in an address extraction process using land prepits according to the embodiment.
- FIG. 4 is an explanatory diagram of a disk on which land prepits are formed.
- 5A to 5C are explanatory diagrams of the waveform of the land pre-pit signal.
- FIG. 6 is an explanatory diagram of a data pattern of a land pre-pit.
- a disk drive device (recording / reproducing device) corresponding to DVD-R and DVD-RW will be described as an example.
- FIG. 1 shows the configuration of the disk drive device 30 of the present example.
- a disc 100 as a DVD-R, DVD-RW is loaded on an evening table 7, and is driven to rotate at a constant linear velocity (CLV) by a spindle motor 6 during a recording / reproducing operation.
- the optical pickup 1 reads out pit data, track coupling information, and land pre-pit information recorded on a track (groove track) on the disc 100.
- the pits recorded as data on the tracks formed as a group are so-called dye change pits or phase change pits.
- a laser diode 4 as a laser light source, a photodetector 5 for detecting reflected light, an objective lens 2 as an output end of the laser light, and the laser light on the disk recording surface via an objective lens 2
- An optical system (not shown) for irradiating the reflected light to the photodetector 5 is formed.
- a monitoring detector 22 for receiving a part of the output light from the laser diode 4.
- the laser diode 4 outputs laser light having a wavelength of 65 nm or 635 nm.
- N A by the optical system is 0.6.
- the objective lens 2 is held by a biaxial mechanism 3 so as to be movable in a tracking direction and a focus direction.
- the entire pickup 1 can be moved in the disk radial direction by a thread mechanism 8.
- the laser diode 4 in the pickup 1 is driven to emit laser light by a drive signal (drive current) from a laser driver 18.
- the reflected light information from the disk 100 is detected by a photodetector 5, and the electric power corresponding to the amount of received light is detected.
- the signal is supplied to the matrix circuit 9 as a signal.
- the matrix circuit 9 includes a current-voltage conversion circuit, a matrix operation Z amplification circuit, and the like corresponding to output currents from a plurality of light receiving elements as the photodetector 5, and generates necessary signals by matrix operation processing.
- RF signal corresponding to reproduced data For example, it generates an RF signal corresponding to reproduced data, a force error signal FE for servo control, a tracking error signal TE, and the like.
- a push-pull signal P / P is generated as a signal relating to land prepit and group wobbling.
- the push-pull signal is also used as a tracking error signal.
- the RF signal output from the matrix circuit 9 is sent to the binarization circuit 11, the focus error signal FE, the tracking error signal TE is sent to the servo circuit 14, and the push-pull signal P / P is the land pre-pit extraction unit 24 And the double PLL 25, respectively.
- the push-pull signal PZP is binarized by the land pre-pit extraction section 24 and supplied to the address decoder 26 as land pre-pit information.
- the address decoder 26 decodes the pre-formatted address information. You. The decoded address information is supplied to the system controller 10.
- a pebble clock WCK is generated by the PLL operation in the pebble PLL 25.
- the wobbled lock WCK is supplied to an encode clock generator 27, a land pre-pit extractor 24, an address decoder 26, and a spindle servo circuit 23.
- the RF signal obtained by the matrix circuit 9 is binarized by the binarization circuit 11 and then supplied to the encoding Z decoding unit 12.
- the encoding / decoding unit 12 has a functional part as a decoder at the time of reproduction and a functional part as an encoder at the time of recording.
- decoding processing such as run-length limited code demodulation processing, error correction processing, and interleaving are performed to obtain reproduction data.
- the encode / decode section 12 generates a reproduction clock synchronized with the RF signal by PLL processing, and executes the decoding processing based on the reproduction clock.
- the encode Z decoding unit 12 accumulates the data decoded as described above in the buffer memory 20.
- the interface unit 13 is connected to an external host computer 80 and communicates with the host computer 80 such as recording data, playback data, and various commands.
- the reproduced data decoded and stored in the buffer memory 20 is transferred to the host computer 80 via the interface unit 13 for output.
- a read command, a write command and other signals from the host computer 80 are supplied to the system controller 10 via the interface 13.
- the recording data is transferred from the host computer 80, and the recording data is sent from the interface unit 13 to the buffer memory 20 for buffering.
- the encoding / decoding section 12 adds the error correction code addition pin and the sub-code to the buffer 100 as the buffered recording data, and records the data on the disc 100. Executes encoding such as run-render limited code modulation as evening.
- an encode clock serving as a reference clock for the encoding process is generated by an encoding clock generating unit 27, and the encoding / decoding unit 12 performs the encoding process using the encoding clock.
- the encode clock generator 27 generates an encode clock from the pebble clock WCK supplied from the pebble PLL 25 and the land pre-pit information supplied from the land pre-pit extractor 24.
- the recording data generated by the encoding process in the encoding / decoding section 12 is converted into a recording pulse (laser driving pulse) in the recording pulse generating section 21 and sent to the laser driver 18.
- the recording pulse generator 21 also performs recording compensation, that is, fine adjustment of the optimum recording power for the characteristics of the recording layer, the spot shape of one laser beam, the recording linear velocity, and the adjustment of the laser drive pulse waveform.
- the laser driver 18 supplies a drive current based on the supplied laser drive pulse to the laser diode 4 to perform laser emission driving. As a result, pits (dye change pits / phase change pits) corresponding to the recording data are formed on the disc 100.
- the APC circuit (Au to Power Control) 19 is a circuit that controls the laser output power using the output of the monitoring detector 22 to keep the laser output constant regardless of temperature. Department.
- the target value of the laser output is given from the system controller 10, and the laser driver 18 is controlled so that the laser output level becomes the target value.
- the servo circuit 14 generates various focus, tracking, and thread servo drive signals from the focus error signal FE and the tracking error signal TE from the matrix circuit 9 to execute the servo operation. That is, a focus drive signal FD and a tracking drive signal TD are generated in accordance with the focus error signal FE and the tracking error signal TE, and are supplied to the two-axis driver 16.
- the two-axis driver 16 drives the focus coil and tracking coil of the two-axis mechanism 3 in the pickup 1.
- a tracking servo loop and a focus servo loop by the pickup 1, the matrix circuit 9, the servo circuit 14, the two-axis driver 16, and the two-axis mechanism 3 are formed.
- the servo circuit 14 turns off the tracking support in response to a track jump command from the system controller 10 and outputs a jump drive signal to the two-axis driver 16, Execute the track jump operation. Further, the servo circuit 14 generates a thread error signal based on a thread error signal obtained as a low-frequency component of the tracking error signal TE, an access execution control from the system controller 10, and the like. Supply 5 The thread driver 15 drives the sled mechanism 8 according to the thread drive signal. Although not shown, the thread mechanism 8 has a mechanism including a main shaft for holding the pickup 1, a thread motor, a transmission gear, etc., and a thread driver 15 drives the thread mechanism 8 according to a thread drive signal. As a result, the required slide movement of the pickup 1 is performed.
- the spindle servo circuit 23 controls the spindle motor 6 to rotate CLV.
- the spindle support circuit 23 obtains the wobble output clock WCK generated by the wobble PLL as the current rotation speed information of the spindle motor 6 and compares it with predetermined CLV reference speed information. This generates a spindle error signal SPE.
- the reproduction clock (clock used as a reference for the decoding process) generated by the PLL in the encode Z decoding unit 12 becomes the current rotation speed information of the spindle motor 6. Is compared with predetermined CLV reference speed information to generate a spindle error signal SPE.
- the spindle servo circuit 23 supplies a spindle drive signal generated in accordance with the spindle error signal SPE to the spindle motor driver 17.
- the spindle motor driver 17 applies, for example, a three-phase drive signal to the spindle motor 6 according to the spindle drive signal, and causes the spindle motor 6 to perform CLV rotation.
- the spindle servo circuit 23 generates a spindle drive signal according to the spindle kick / brake control signal from the system controller 10, and starts, stops, accelerates, decelerates, etc. the spindle motor 6 by the spindle motor driver 17. Is also executed.
- the various operations of the support system and the recording / reproducing system as described above are controlled by a system controller 10 formed by a microcomputer.
- the system controller 10 executes various processes according to commands from the host computer 80.
- seek operation control is performed for the purpose of the designated address. That is, a command is issued to the support circuit 14, and the access operation of the pickup 1 is executed in which the address specified by the seek command is obtained at night.
- operation control necessary for transferring the data of the designated data section to the host computer 80 is performed. That is, data reading / decoding from the disk 100 is performed, and Z buffering is performed to transfer the requested data.
- the system controller 10 When a write command (write command) is issued from the host computer 80, the system controller 10 first moves the pickup 1 to an address to be written. Then, the encoding / decoding unit 12 executes the encoding process on the data transferred from the host computer 80 as described above.
- the recording is executed by supplying the laser driving pulse from the recording pulse generating section 21 to the laser driver 18.
- the signal detected by the pickup 1 is converted by the matrix circuit 9 into a support error signal such as a focus error signal FE and a tracking error signal TE, and sent to the support circuit 14.
- Drive signals FD and TD output from the support circuit 14 drive the two-axis mechanism 3 of the pickup 1 to perform focus servo and tracking servo.
- the signal detected by the pickup 1 is converted into an RF signal by the matrix circuit 9 and sent to the encode Z-decode section 12.
- the encoding / decoding unit 12 reproduces the channel clip and performs decoding based on the channel clip.
- the decoded data is sent to the interface unit 13.
- the rotation of the disc 100 is controlled by sending the channel clock reproduced by the encode / decode section 12 to the spindle servo circuit 23. • Padless playback
- the address is included in the RF signal, decoded by the encode / decode section 12 and sent to the system controller 10.
- the address is extracted by the land pre-pit and movement control to the target position is performed.
- the APC circuit 19 controls so as to keep the laser output constant under the direction of the system controller 10.
- the data fetched through the interface unit 13 is subjected to channel coding such as addition, rearrangement, and modulation of ECC in the encoding / decoding unit 12.
- the channel-coded data is converted into a laser drive pulse suitable for the disc 100 by the recording pulse generator 21, and the laser in the pickup 1 is passed through the laser driver 18 (APC circuit 19). Added to diode 4.
- the push-pull signal P-no-P output from the matrix circuit 9 is turned into a WCK signal WCK by a double PLL, and is applied to a spindle support circuit 23 to control the rotation at a constant linear velocity (CLV). .
- the push-pull signal PZP output from the matrix circuit 9 is sent to the land pre-pit extraction section 24, where land pre-pit information is detected.
- the detected land prepit information is decoded into an address value by the address decoder 26 and read by the system controller 10.
- the land pre-pit information is also sent to the encode clock generator 27, where the encode clock is reproduced and added to the encode Z decoder 12.
- the disk drive 30 is connected to the host computer 80.
- the disk drive of the present invention may be in a form not connected to the host computer 80 or the like.
- an operation unit and a display unit are provided, and a data input / output interface
- the configuration of the parts is different from that of FIG. In other words, it is sufficient that recording and reproduction are performed according to the operation of the user, and a terminal unit for inputting and outputting various data is formed.
- the photodetector 5 in the pickup 1, the differential amplifier 9a in the matrix circuit 9, the land prepit extraction unit 24, the wobbled PLL 25, and the address decoder are used to detect land prepits. 26 and the system controller 10.
- the matrix circuit 9 only the differential amplifier 9a that generates the push-pull signal P / P is shown, and the circuit components that generate the above-described RF signal, focus error signal FE, tracking error signal TE, etc. And illustration and description thereof will be omitted.
- the photodetector 5 is a four-segment detector composed of light receiving parts A, B, C, and D as shown in the figure.
- the reflected light (current corresponding to the amount of received light) detected by each light receiving part is a matrix circuit.
- the current / voltage conversion is performed in step 9, and the A, B, C, and D signals, which have been converted into voltage values, are calculated to generate required signals such as a focus error FE and a push-pull signal P / P. .
- a signal for generating the push-pull signal PZP will be described.
- the signal for obtaining the push-pull signal PZP is, when the laser spot LS is irradiated on the track as shown in the figure, a reflected light amount signal corresponding to the left half of the laser spot LS in the figure with respect to the track line direction. And the reflected light amount signal corresponding to the right half. That is, the signal B + D is subtracted from the signal A + C by the differential amplifier 9a to generate the push-pull signal PZP.
- Signal A + C is obtained by converting the currents obtained at the light receiving sections A and C into voltages and adding them.
- the signal B + D is obtained by converting the currents obtained in the light receiving sections B and D into voltages and adding them.
- the push-pull signal P / P is supplied to the wobbled PLL 52 to generate a wobbled clock WCI synchronized with the wobbled signal.
- the push-pull signal P / P is of supplied to the land prepit extraction section 24 'is 0
- the land pre-pit extraction unit 24 has a window generation circuit 31, an integration circuit 1032, a binarization circuit 33, a mono multivibrator 34, and a D flip-flop 35.
- the window generation circuit 31 binarizes the push-pull signal PZP using a predetermined threshold level th1 and outputs the binarized signal to the integration circuit 32 as a window signal Wd.
- FIG. 3A shows, as a push-pull signal PZP in an area where data is recorded on a groove track, an amplitude waveform due to land pre-pits.
- the push-pull signal P / P is compared with the threshold level th1 and is binarized to generate a window signal Wd 20 as shown in FIG. 3B.
- This window signal Wd is a signal indicating a period in which the amplitude due to the land prepit is present.
- the integration circuit 32 is configured to perform integration with respect to the input push-pull signal P / P only while the window signal is active, and to reset the integration when the window signal Wd is closed. Accordingly, the integration output signal S 1 of the integration circuit 32 is as shown in FIG. 3C. That is, the integration output signal S 1 is a signal obtained by integrating the push-pull signal P / P in the amplitude period due to the land pre-pit.
- the output signal S 1 of the integrating circuit 32 is binarized by a binarizing circuit 33 at a predetermined threshold level th 2.
- the output signal S2 of the binarization circuit 33 is as shown in FIG. 3D.
- the output signal S 2 of the binarization circuit 33 is extended in the time direction by the monomultivibrator 34 and supplied to the D flip-flop 35. Then, the D flip-flop 35 outputs a latch output at the falling edge of the clock WCK.
- the output of the D flip-flop 35 becomes the information of the land pre-pits b2, b1, b0 described in FIGS. 5A to 5C and is supplied to the address decoder 26.
- the address decoder 26 detects the data pattern shown in Fig. 6 from the information of b2, bl, and b0, extracts "1" and "0", decodes the address information from the data string, and corrects the error. And so on. The address information extracted by this is sent to the system controller 10.
- the push-pull signal PP is integrated during the amplitude period of the land pre-pit, and information on the land pre-pit is extracted from the integrated output signal S1.
- the push-pull signal PZP was not able to detect a good address because the amplitude based on the land pre-pits was disturbed.
- the push-pull signal P / P is integrated to obtain a clear amplitude waveform corresponding to the land pre-pit, and the integrated signal is binarized to obtain the land pre-pit. get information.
- -Even if data is recorded, land pre-pits can be detected accurately. Therefore, the address information by land pre-pits can be read stably.
- the land pre-pit detection period is defined by the window signal obtained by binarizing the push-pull signal, and the push-pull signal is integrated during that period. From the result, address information by land pre-pit is obtained.
- the integrated signal of the push-pull signal has a clear waveform corresponding to the land pre-pit, the address information by the land pre-pit is stably read even after the data is recorded on the groove track. This has the effect of making it possible to stabilize additional recording and seek operations on the disc after recording, thereby improving the performance of the device.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60315305T DE60315305T2 (de) | 2002-08-12 | 2003-08-12 | Plattenlaufwerkeinrichtung und adressendetektionsverfahren |
EP03784649A EP1530203B1 (en) | 2002-08-12 | 2003-08-12 | Disc drive device and address detection method |
US10/492,286 US7307936B2 (en) | 2002-08-12 | 2003-08-12 | Disk drive device and address detection method with binarized push-pull signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-234739 | 2002-08-12 | ||
JP2002234739A JP2004079030A (ja) | 2002-08-12 | 2002-08-12 | ディスクドライブ装置、アドレス検出方法 |
Publications (1)
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WO2004015698A1 true WO2004015698A1 (ja) | 2004-02-19 |
Family
ID=31711927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/010264 WO2004015698A1 (ja) | 2002-08-12 | 2003-08-12 | ディスクドライブ装置、アドレス検出方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7307936B2 (ja) |
EP (1) | EP1530203B1 (ja) |
JP (1) | JP2004079030A (ja) |
KR (1) | KR20050026691A (ja) |
DE (1) | DE60315305T2 (ja) |
TW (1) | TWI226615B (ja) |
WO (1) | WO2004015698A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005086145A1 (en) * | 2004-02-26 | 2005-09-15 | Koninklijke Philips Electronics N.V. | Multiple-spiral hybrid disc for e-book applications |
US8247524B2 (en) | 2003-11-04 | 2012-08-21 | Suprapolix B.V. | Preparation of supramolecular polymers containing quadruple hydrogen bonding units in the polymer backbone |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100601048B1 (ko) * | 2004-04-22 | 2006-07-14 | 한국전자통신연구원 | 버스트 모드 패킷의 수신기 및 그 패킷의 수신 방법 |
GB0413647D0 (en) * | 2004-06-18 | 2004-07-21 | Koninkl Philips Electronics Nv | Land pre-pit signal processing method and related apparatus |
US8164993B2 (en) | 2007-10-15 | 2012-04-24 | Marvell International Ltd. | Method and apparatus for detecting land pre-pits |
WO2012138747A1 (en) | 2011-04-05 | 2012-10-11 | Marvell World Trade, Ltd. | Method and apparatus for detecting land pre-pits |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000113463A (ja) * | 1998-09-30 | 2000-04-21 | Pioneer Electronic Corp | プリピット検出装置 |
JP2001266356A (ja) * | 2000-03-24 | 2001-09-28 | Matsushita Electric Ind Co Ltd | プリピット再生装置 |
JP2001312823A (ja) * | 2000-02-21 | 2001-11-09 | Victor Co Of Japan Ltd | プリピット検出装置、プリピット検出方法、位置及び周波数信号の検出回路 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8429991D0 (en) * | 1984-11-28 | 1985-01-09 | Gen Electric Co Plc | Display devices |
US5036185A (en) * | 1988-12-27 | 1991-07-30 | Kabushiki Kaisha Toshiba | Optical apparatus for detecting a focusing state |
JPH11176019A (ja) * | 1997-10-06 | 1999-07-02 | Fujitsu Ltd | 光学的情報記憶装置 |
US6754157B2 (en) | 2000-08-07 | 2004-06-22 | Victor Company Of Japan, Limited | Recording and/or reproducing apparatus and recording and/or reproducing method capable of detecting a land pre-pit on disc securely at a high precision |
US6967908B2 (en) * | 2000-09-07 | 2005-11-22 | Pioneer Corporation | Optical pickup device with focus error detecting optical element and method for focus error detection |
JP2002216355A (ja) | 2001-01-15 | 2002-08-02 | Pioneer Electronic Corp | プリピット検出装置 |
JP3791776B2 (ja) * | 2001-02-06 | 2006-06-28 | パイオニア株式会社 | 光記録媒体のプリピット検出装置 |
-
2002
- 2002-08-12 JP JP2002234739A patent/JP2004079030A/ja active Pending
-
2003
- 2003-08-06 TW TW092121491A patent/TWI226615B/zh not_active IP Right Cessation
- 2003-08-12 EP EP03784649A patent/EP1530203B1/en not_active Expired - Fee Related
- 2003-08-12 US US10/492,286 patent/US7307936B2/en not_active Expired - Fee Related
- 2003-08-12 DE DE60315305T patent/DE60315305T2/de not_active Expired - Fee Related
- 2003-08-12 KR KR1020047005200A patent/KR20050026691A/ko not_active Application Discontinuation
- 2003-08-12 WO PCT/JP2003/010264 patent/WO2004015698A1/ja active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000113463A (ja) * | 1998-09-30 | 2000-04-21 | Pioneer Electronic Corp | プリピット検出装置 |
JP2001312823A (ja) * | 2000-02-21 | 2001-11-09 | Victor Co Of Japan Ltd | プリピット検出装置、プリピット検出方法、位置及び周波数信号の検出回路 |
JP2001266356A (ja) * | 2000-03-24 | 2001-09-28 | Matsushita Electric Ind Co Ltd | プリピット再生装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1530203A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8247524B2 (en) | 2003-11-04 | 2012-08-21 | Suprapolix B.V. | Preparation of supramolecular polymers containing quadruple hydrogen bonding units in the polymer backbone |
WO2005086145A1 (en) * | 2004-02-26 | 2005-09-15 | Koninklijke Philips Electronics N.V. | Multiple-spiral hybrid disc for e-book applications |
Also Published As
Publication number | Publication date |
---|---|
JP2004079030A (ja) | 2004-03-11 |
US20050007928A1 (en) | 2005-01-13 |
US7307936B2 (en) | 2007-12-11 |
TWI226615B (en) | 2005-01-11 |
EP1530203B1 (en) | 2007-08-01 |
TW200405287A (en) | 2004-04-01 |
DE60315305D1 (de) | 2007-09-13 |
EP1530203A1 (en) | 2005-05-11 |
EP1530203A4 (en) | 2005-12-21 |
KR20050026691A (ko) | 2005-03-15 |
DE60315305T2 (de) | 2008-04-30 |
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