WO2006112351A1 - 情報記録媒体、情報記録装置及び情報記録方法、並びにコンピュータプログラム - Google Patents
情報記録媒体、情報記録装置及び情報記録方法、並びにコンピュータプログラム Download PDFInfo
- Publication number
- WO2006112351A1 WO2006112351A1 PCT/JP2006/307825 JP2006307825W WO2006112351A1 WO 2006112351 A1 WO2006112351 A1 WO 2006112351A1 JP 2006307825 W JP2006307825 W JP 2006307825W WO 2006112351 A1 WO2006112351 A1 WO 2006112351A1
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- WIPO (PCT)
- Prior art keywords
- recording
- information
- pit row
- track
- information recording
- Prior art date
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Classifications
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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
- G11B7/24—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
- G11B7/24085—Pits
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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
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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
- G11B7/24—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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
- G11B2020/1222—ECC block, i.e. a block of error correction encoded symbols which includes all parity data needed for decoding
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
- G11B2020/1238—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
- G11B2020/1238—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located
- G11B2020/1239—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located the track being a pregroove, e.g. the wobbled track of a recordable optical disc
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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
- G11B2020/1267—Address data
- G11B2020/1274—Address data stored in pre-pits, i.e. in embossed pits, ROM marks or prepits
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- 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
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- 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
Definitions
- Information recording medium information recording apparatus, information recording method, and computer program
- the present invention relates to an information recording medium such as a DVD, for example, an information recording apparatus and an information recording method such as a DVD recorder, and a technical field of a computer program that causes a computer to function as such an information recording apparatus.
- an information recording medium such as a CD-ROM (Compact Disc-Read Only Memory) and a DVD-ROM such as a read-only optical disc
- a depression (hole) called a recording pit is formed on the recording layer.
- Various information is recorded by being formed.
- an information recording medium such as a CD-RZRW or DVD-RZRW recording type optical disc
- the recording layer is irradiated with a recording laser beam to change the state of the recording layer.
- Various information is recorded. More specifically, for example, in the case of an optical disc such as a DVD-R having a recording layer made of an organic dye film, the organic dye film is destroyed by the heat generated by the laser light irradiation, and as a result, the laser light irradiation is performed. The state of the marked part changes.
- the state of the phase change film changes from a crystalline state to an amorphous state (amorphous state) due to heat generated by laser light irradiation. Or from an amorphous state to a crystalline state. Due to this change in state, a recording pit (or a recording mark in this case) having the same characteristics as a dent in a read-only optical disk is formed.
- a recording pit is formed at an appropriate position while referring to a recording track called a groove track or a land track.
- a read-only optical disc has! /, A groove track, or a land track, and a recording optical disc.
- the reproduction waveform obtained by reproducing the read-only optical disc and the reproduction waveform obtained by reproducing the recordable optical disc are: to differ greatly.
- the reproduction compatibility of both optical discs may be affected. In the worst case, the compatibility cannot be maintained.
- a reproducing apparatus for reproducing a read-only optical disc a recording type optical disc is used. However, it has a technical problem that information recorded in the media cannot be reproduced.
- the present invention has been made in view of the above-described conventional problems, for example, an information recording medium and an information recording apparatus that can achieve good compatibility with, for example, a reproduction-only information recording medium And an information recording method and a computer program.
- the information recording medium of the present invention includes a recording track on which information is recorded by being wobbled and forming a recording pit row, and the recording pit row includes the recording track. Formed by wobbling to the opposite phase of wobbling
- a recording pit row including a large number of recording pits (that is, a recording pit row corresponding to the arrangement of the recording pits) is formed on the recording track, so that the video information And voice information and other various information are recorded.
- the recording track is coupled with a predetermined period.
- the entire recording track may be wobbled with a predetermined period, or a part of the recording track may be wobbled with one period, and the other part may be wobbled with another period different from the one period.
- the wobbling of the recording track is referred to, for example, when recording information or controlling the recording operation.
- the wobbling phase of the recording track is reversed from the wobbling phase of the recording pit row formed on the recording track.
- the wobbling direction of the recording track the direction of vibration
- the wobbling direction of the recording pit row are: Vice versa.
- the recording track swings relatively to the right along the information recording direction
- the recording pit row swings relatively to the left.
- the recording pit row swings relatively to the right.
- a recording pit row wobbling in a pattern opposite to the wobbling pattern of the recording track is formed.
- the signal component caused by the recording track in the push-pull signal and the signal caused by the recording pit row in the push-pull signal are signals opposite to each other.
- the signal component resulting from the recording track has the maximum peak value
- the signal component resulting from the recording pit row has the minimum peak value.
- the sum of both signal components can be regarded as a DC signal.
- the signal component (that is, push-pull signal) caused by the recording pit row is naturally equal to the DC signal. It is.
- the information recording medium of the present invention it is possible to acquire a reproduction signal that is the same or substantially the same as the reproduction signal obtained from the read-only information recording medium. For this reason, even in an information reproducing apparatus for reproducing a read-only information recording medium, the recorded pit string recorded on the information recording medium according to the present invention can be suitably reproduced without any particular inconvenience. Can do. That is, according to the information recording medium of the present invention, even if it is a recording type information recording medium, compatibility with a read-only type information recording medium can be suitably achieved.
- phase of wobbling is reversed in the present invention need not be exactly opposite in the strict sense, as long as it does not affect the compatibility with a read-only information recording medium. For example, it may have some deviation.
- the wobbling amplitude of the recording pit row is approximately twice the wobbling amplitude of the recording track.
- the mark portion in which the state of the recording layer is changed (or changed to one state) and the state of the recording layer are not changed (or changed to another state different from the one state).
- It may be formed by combining with a space portion. Therefore, according to this aspect, in consideration of the combination of the mark portion and the space portion, the amplitude of the signal component due to the recording track and the amplitude of the signal component due to the recording pit row are made substantially the same. Is possible. Accordingly, compatibility between the recording type information recording medium and the read-only type information recording medium can be more suitably achieved.
- the duty ratio of the recording pit row is approximately 50%. That is, in the entire recording pit row, the ratio occupied by the mark portion and the ratio occupied by the space portion are substantially the same.
- the amplitude of the signal component due to the recording track and the amplitude of the signal component due to the recording pit row are: It can be almost the same. Therefore, it is possible to more appropriately achieve compatibility between the recording type information recording medium and the read-only type information recording medium.
- the recording track is modulated and wobbled.
- an information recording apparatus of the present invention forms a recording pit row on a recording track to be wobbled, thereby recording information and a phase opposite to the wobbling phase of the recording track. And a control means for controlling the recording means so as to form the recording pit row to be wobbled.
- a recording pit row is formed on a recording track that wobbles at a predetermined period by the operation of the recording means. As a result, information is recorded on the information recording medium.
- the phase opposite to the wobbling phase of the recording track is obtained.
- the recording means is controlled so as to form a recording pit row that wobbles in phase. Therefore, the information recording medium force in which such a recording pit row is formed can acquire a reproduction signal that is the same or substantially the same as the reproduction signal obtained as a reproduction-only information recording medium force as described above. . For this reason, even in an information reproducing apparatus for reproducing a read-only information recording medium, the recorded pit train recorded on the information recording medium according to the present liquid can be suitably reproduced without any particular inconvenience. Can do. That is, according to the information recording apparatus of the present invention, information can be recorded on the recording type information recording medium so that compatibility with the read-only information recording medium can be suitably achieved. it can.
- control means forms the recording pit row wobbled with an amplitude approximately twice the amplitude of the recording track winding.
- the amplitude of the signal component due to the recording track and the amplitude of the signal component due to the recording pit row are substantially the same. be able to. Accordingly, it is possible to more appropriately achieve compatibility between the recording type information recording medium and the read-only type information recording medium.
- control means controls the recording means so as to form the recording pit train having a duty ratio of approximately 50%. That is, the recording means is controlled so that a recording pit row is formed in which the ratio occupied by the mark portion and the ratio occupied by the space portion are substantially the same.
- the amplitude of the signal component due to the recording track and the amplitude of the signal component due to the recording pit row are: It can be almost the same. Therefore, it is possible to more appropriately achieve compatibility between the recording type information recording medium and the read-only type information recording medium.
- the recording track is modulated and wobbled.
- Another aspect of the information recording apparatus of the present invention reduces the recording speed of the information as compared to the case where the recording pit row wobbling in the same direction as the wobbling phase of the recording track is formed. A speed reduction means is further provided.
- the recording pit is based on detection means for detecting at least one of a wobbling phase and an amplitude of the recording track, and the detected wobbling phase.
- the apparatus further comprises delay adding means for adding a phase delay to the recording signals for forming the columns, and gain adjusting means for adjusting the gain of the recording signals based on the detected amplitude of the wobbling.
- the recording pit row is formed based on the wobbling phase and amplitude of the recording track detected by the operation of the detecting means. Specifically, a phase delay based on the wobbling phase of the recording track is added to the recording signal by the operation of the delay adding means. That is, the phase delay is added to the recording signal so that a recording pit sequence wobbling with a phase opposite to the phase of the recording track wobbling is formed. Further, the gain of the recording signal is adjusted based on the wobbling amplitude of the recording track by the operation of the gain adjusting means.
- the gain of the recording signal is adjusted so that, for example, a recording pit train that swings with an amplitude approximately twice the amplitude of the wobbling of the recording track is formed.
- a recording pit row wobbling with a phase opposite to the phase of the recording track wobbling can be formed.
- the recording unit includes an irradiation unit that forms the recording pit row by irradiating a laser beam, and an optical path adjustment unit that adjusts an optical path of the laser beam. Including.
- the optical path adjusting means May be configured to include a piezo element.
- the optical path of the laser beam can be adjusted using a piezo element capable of high-speed reaction. Therefore, no matter how the recording track is wobbled, it is possible to suitably form a recording pit row wobbling with a phase opposite to the wobbling phase.
- an information recording method of the present invention is an information recording method in an information recording apparatus comprising a recording means for recording information by forming a recording pit row on a recording track to be wobbled.
- a second control step for controlling the recording means is a first control step of controlling the recording means so as to form the recording pit row according to the information, and forming the recording pit row wobbling in a phase opposite to the wobbling phase of the recording track.
- the information recording method of the present invention can also adopt various aspects.
- a computer program of the present invention is a computer program for recording control for controlling a computer provided in the above-described information recording apparatus of the present invention (including various aspects thereof), The computer is caused to function as the control means.
- the computer program of the present invention is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program and executed by the computer, or If the computer program is downloaded to a computer via communication means and then executed, the above-described information recording apparatus of the present invention can be realized relatively easily.
- a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program and executed by the computer, or If the computer program is downloaded to a computer via communication means and then executed, the above-described information recording apparatus of the present invention can be realized relatively easily.
- the computer program of the present invention can also adopt various aspects.
- a computer program product in a computer-readable medium is executable by a computer provided in the above-described information recording apparatus (including various aspects thereof) of the present invention.
- Program instructions are clearly embodied to cause the computer to function as the control means.
- the computer program product of the present invention if the computer program product is read into a computer from a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product, or
- a recording medium such as a ROM, CD-ROM, DVD-ROM, or hard disk storing the computer program product
- the computer program product which is a transmission wave
- the computer program product which is a transmission wave
- the computer program product may comprise a computer readable code (or computer readable instruction) that functions as the information recording apparatus of the present invention described above.
- the information recording apparatus or method of the present invention includes a recording unit and a control unit, or a first control step and a second control step. Therefore, the information recording medium recorded by the information recording apparatus or method can have good compatibility with, for example, a read-only information recording medium.
- FIG. 1 is a plan view and a cross-sectional view showing a schematic configuration of an optical disc according to the present embodiment.
- FIG. 2 is a partially enlarged perspective view of the recording surface of the optical disc in the example.
- FIG. 3 is a block diagram conceptually showing the basic structure of an information recording / reproducing apparatus in an example.
- FIG. 4 is an enlarged perspective view showing a recording pit row formed on a groove track.
- FIG. 5 is a waveform diagram conceptually showing a waveform of a push-pull signal obtained by reproducing an optical disc on which a recording pit row is formed.
- FIG. 6 is a plan view showing recording pit rows in a read-only optical disc.
- FIG. 6 is a waveform diagram conceptually showing a waveform of a push-pull signal obtained by reproducing a read-only optical disc on which a recording pit row is formed.
- FIG. 7 is a block diagram conceptually showing a more specific structure of the information recording / reproducing apparatus.
- FIG. 8 is a plan view conceptually showing a recording pit row formed on a groove track.
- FIG. 9 is a waveform diagram conceptually showing a waveform of a push-pull signal obtained by reproducing an optical disc on which a recording pit row is formed.
- FIGS. 1 is a plan view and a cross-sectional view showing a schematic configuration of the optical disc 100
- FIG. 2 is a partially enlarged perspective view of the recording surface of the optical disc 100.
- the optical disc 100 has a disk shape with a diameter of about 12 cm, and a center hole 102 is provided at the center.
- Examples of the optical disc 100 include DVD player R, DVD player RW, DVD-RAM, BD (Blu-ray Disc), HD DVD (High Definition DVD), and the like.
- FIG. 1 is a plan view and a cross-sectional view showing a schematic configuration of the optical disc 100
- FIG. 2 is a partially enlarged perspective view of the recording surface of the optical disc 100.
- the optical disc 100 has a disk shape with a diameter of about 12 cm, and a center hole 102 is provided at the center.
- Examples of the optical disc 100 include DVD player R, DVD player RW, DVD-RAM, BD (Blu-ray Disc), HD DVD (High Definition DVD), and the like
- the optical disc 100 has a structure in which a recording layer 103 is provided between the transparent substrates 101a and 101b. Further, in each recording area of the recording layer 103, tracks such as a groove track and a land track (not shown) are alternately provided in a spiral shape or a concentric shape with the center hole 102 as a center. Data is divided and recorded in units of ECC blocks on each of the groove track and the land track or on one of them.
- the optical disc 100 forms a data recording surface on the disc-shaped transparent substrate 101a (on the lower side in FIG. 2).
- a non-reversible change recording type or phase change recording type recording film 113 is laminated, a reflective film 118 is laminated thereon (on the lower side in FIG. 2), and finally a transparent substrate 101b is laminated.
- Groove tracks GT and land tracks LT constituting one specific example of the “recording track” of the present invention are alternately formed on the data recording surface which also has the surface force of the recording film 113.
- the laser beam LB is irradiated onto, for example, the groove track GT through the transparent substrate 101a.
- the laser beam LB is irradiated with the recording laser power, so that irreversible change recording or phase change recording by heating the recording film 113 or the like is performed according to the data to be recorded.
- reading of the data recorded on the recording film 113 is performed by irradiating the laser beam LB with a reproduction laser beam weaker than the recording laser power.
- the groove track GT is oscillated (ie, wound) with a constant amplitude and spatial frequency.
- the period of the wobble 119 is set to a predetermined value.
- On the land track LT an address pit called a land prepit LPP indicating a preformat address is formed.
- a land prepit LPP indicating a preformat address is formed.
- FIG. 3 is a block diagram conceptually showing the basic structure of the information recording / reproducing apparatus 200 in the example.
- the information recording / reproducing apparatus 200 has a function of recording data on the optical disc 100 and a function of reproducing data recorded on the optical disc 100.
- the information recording / reproducing apparatus 200 includes a disk drive 300 on which the optical disk 100 is actually loaded and data is recorded and reproduced, and data recording and data recording on the disk drive 300. And a host computer 400 such as a personal computer for controlling playback!
- the disc drive 300 includes an optical disc 100, a spinner motor 351, an optical pickup 352, a signal recording / reproducing means 353, a CPU (drive control means) 354, a memory 355, a data input / output control means 306, and a bus 357. It is configured.
- the host computer 400 includes a CPU 359, a memory 360, an operation / display control means 307, an operation button 310, a display panel 311 and a data input / output control means 308.
- the spindle motor 351 rotates and stops the optical disc 100 and operates when accessing the optical disc 100. More specifically, the spindle motor 351 is configured to rotate and stop the optical disc 100 at a predetermined speed while receiving spindle servo from a servo unit (not shown) or the like.
- the optical pickup 352 constitutes a specific example of “recording means” in the present invention, and in order to perform recording / reproduction on the optical disc 100, for example, a semiconductor laser device and a lens isotropic force are also configured. More specifically, the optical pickup 352 irradiates the optical disc 100 with a light beam such as a laser beam at a first power as read light during reproduction and during recording. The writing light is irradiated with the second power and modulated. Thereby, for example, a recording pit is formed on the groove track GT.
- the signal recording / reproducing means 353 constitutes one specific example of the “control means” in the present invention, and performs recording / reproduction with respect to the optical disc 100 by controlling the spindle motor 351 and the optical pickup 352. More specifically, the signal recording / reproducing means 353 includes, for example, a laser diode driver (LD dryer), a head amplifier, and the like.
- the laser diode driver drives a semiconductor laser (not shown) provided in the optical pickup 352.
- the head amplifier amplifies the output signal of the optical pickup 352, that is, the reflected light of the light beam, and outputs the amplified signal.
- the memory 355 includes general data processing and OPC processing in the disk drive 300, such as a buffer area for recording / reproducing data and an area used as an intermediate buffer when converted to data used by the signal recording / reproducing means 353. Used in.
- the memory 355 is a program for operating as a recorder device, that is, a ROM area in which firmware is stored, a buffer for temporarily storing recording / playback data, and variables necessary for the operation of the firmware program, etc. RAM area where is stored.
- the CPU (drive control means) 354 is connected to the signal recording / reproducing means 353 and the memory 355 via the bus 357, and controls the entire disk drive 300 by giving instructions to various control means. Normally, the software or firmware for operating the CPU 354 is stored in the memory 355!
- the data input / output control means 306 controls external data input / output to / from the disk drive 300, and stores and retrieves data in / from the data buffer on the memory 355.
- the drive control command issued from the external host computer 400 connected to the information recording / reproducing device 300 via an interface such as SCSI or ATAPI is transmitted to the CPU 354 via the data input / output control unit 306.
- the operation Z display control means 307 is for receiving and displaying an operation instruction with respect to the host computer 400.
- the operation Z display control means 307 transmits an instruction by the operation button 310 such as recording or reproduction to the CPU 359.
- the CPU 359 receives data based on the instruction information from the operation Z display control means 307.
- a control command (command) is transmitted to the information recording / reproducing apparatus 300 via the output means 308 to control the entire disk drive 300.
- the CPU 359 can send a command requesting the disk drive 300 to send the operating status to the host.
- the operating state of the disk drive 300 during recording and playback can be grasped, so the CPU 359 displays the operating state of the disk drive 300 on the display panel 311 such as a fluorescent tube or LCD via the operation / display control means 307. Can be output.
- the memory 360 is an internal storage device used by the host computer 400.
- a ROM area in which a firmware program such as BIOS (Basic Input / Output System) is stored, an operating system, an operation of an application program, etc.
- BIOS Basic Input / Output System
- the RAM area that stores the necessary variables is also configured. Also, it is not shown in the figure via the data input / output control means 308, and may be connected to an external storage device such as a node disk.
- the disk drive 300 and the host computer 400 in combination as described above is a household device such as a recorder device that records and reproduces video.
- This recorder device is a device that records a video signal from a broadcast receiving tuner or external connection terminal power on a disc and outputs the video signal reproduced from the disc to an external display device such as a television.
- the program stored in the memory 360 is executed by the CPU 359 to operate as a recorder device.
- the disk drive 300 is a disk drive (hereinafter referred to as a drive as appropriate)
- the host computer 400 is a personal computer or a workstation.
- a host computer such as a personal computer and the drive are connected via data input / output control means 306 and 308 such as SCSI and ATAPI, and control of the disk drive 300 such as writing software installed in the host computer 400 To do.
- FIG. 4 is an enlarged perspective view showing a recording pit row formed on the groove track GT
- FIG. 5 is a push acquired by reproducing the optical disc 100 on which the recording pit row is formed.
- It is a waveform diagram conceptually showing the waveform of a pull signal or its signal component.
- the recording / reproducing apparatus 200 according to the present embodiment is opposite to the phase of the wobbling of the groove track GT (hereinafter referred to as “harvest”) (the phase of wobble 119).
- a recording pit row that is, a set row of recording pits) that swings in phase is formed.
- the swaying of the recorded pit row is indicated by a one-dot chain line.
- a recording pit train swinging relatively upward as viewed from the whole recording pit train is formed on the groove track GT which swings relatively upward in FIG. 4, when viewed from the whole recording pit row.
- the recording pit row which swings relatively downward is formed on the groove track GT which swings relatively upward in FIG. 4, when viewed from the whole recording pit row.
- the swing amplitude A2 of the recorded pit train is approximately twice the swing amplitude A1 of the groove track GT.
- the signal components of the push-pull signal shown in FIGS. 5 (a) and 5 (b) are acquired.
- the signal component of the push-pull signal acquired by irradiating the groove track GT with the laser beam LB (hereinafter referred to as “signal component due to the groove track GT” as appropriate) is shown in FIG. ).
- the signal component of the push-pull signal obtained by irradiating the recording pit row with the laser beam LB hereinafter referred to as “signal component caused by the recording pit row” as appropriate) is shown in FIG. Indicated. Since the phase of the groove track GT and the recording pit row are opposite to each other, the signal component caused by the groove track GT and the signal component caused by the recording pit row are opposite in phase. Vibrate.
- the ratio of the mark portion where the recording pit is formed and the space portion where the recording pit is not formed is approximately 1: 1 (that is, the duty ratio is approximately 50%). Formed as follows. Since the swing amplitude A2 of the recording pit row is approximately twice the swing amplitude A1 of the groove track GT, the signal component amplitude S2 caused by the recording pit row and the groove track GT The amplitude S1 of the signal component is substantially the same.
- the push-pull signal that is, the signal component resulting from the groove track GT and the signal resulting from the recording pit train
- the sum signal with the component becomes a signal containing only the DC component.
- FIG. 6 is a plan view showing a recording pit row in a read-only optical disc, and a push-pull signal obtained by playing back the read-only optical disc on which such a recording pit row is formed. It is a wave form diagram which shows the waveform of no.
- Fig. 6 (a) in the read-only optical disc, recording pits are formed by depressions (holes) on the recording surface.
- the recording pits are formed so as to be distributed in a spiral shape on the optical disc, but the recording pits are substantially linearly distributed as viewed from the recording / reproducing apparatus 200 that does not move. You can equate.
- the recordable optical disc 100 has! /, And the groove track GT and the land track LT do not have the read-only optical disc.
- the push-pull signal acquired by playing back a read-only optical disc is a signal containing only a DC component as shown in FIG. 6 (b).
- the information recording / reproducing apparatus 200 when the information recording / reproducing apparatus 200 according to the present embodiment reproduces the optical disc 100 on which the recording pit string is formed, it is the same as the push-pull signal acquired by reproducing the reproduction-only optical disc or Almost the same push-pull signal can be acquired. For this reason, even in a read-only information reproducing apparatus for reproducing a read-only optical disk, the recording pit string formed by the information recording / reproducing apparatus 200 according to the present embodiment is preferably used without any particular inconvenience. Can be played. If a recording pit row that does not swing is formed on the groove track GT, the push-pull signal has a waveform that matches the swing of the groove track GT.
- the same push-pull signal (or playback signal) is obtained from the deviation between the read-only optical disc and the recording optical disc 100 according to this embodiment. Therefore, a suitable reproduction operation can be maintained particularly in a reproduction-only information reproduction apparatus.
- the recordable optical disc 100 in which the recording pit train is formed by the information recording / reproducing apparatus 200 according to the present embodiment can be suitably compatible with the read-only optical disc. Togashi.
- FIG. 7 is a block diagram conceptually showing a more specific configuration of the information recording / reproducing apparatus 200.
- the optical pickup 352 includes an LD (Laser Diode) 501, a PD (Photo Detector) 502, a beam splitter 503, a condenser lens 504, an objective lens 505, and a lens drive. Element 506.
- LD Laser Diode
- PD Photo Detector
- LD 501 constitutes a specific example of “irradiation means” in the present invention, and irradiates optical disc 100 with laser beam LB.
- PD 502 constitutes a specific example of “detecting means” in the present invention, and receives the reflected light of laser beam LB irradiated from LD 501.
- a received light signal is generated from the received reflected light, output to the host computer 400, and reproduced as reproduced data.
- the received light signal is output to the phase delay circuit 512 and the gain circuit 513 included in the signal recording / reproducing means 353, and is referred to when generating a recording signal.
- the beam splitter 503 transmits the laser light LB output from the LD 501 as it is, and refracts or reflects the reflected light of the laser light LB incident on the surface force opposite to the incident surface of the laser light LB. To focus on PD502.
- the condensing lens 504 makes the incident laser beam LB substantially parallel light and enters the objective lens 505.
- the objective lens 505 is incident with the laser beam LB that has been made into substantially parallel light by the condenser lens 504.
- the objective lens 505 collects the laser beam LB and irradiates the optical disc 100 with it.
- the lens driving element 506 has a driving mechanism for changing the arrangement position of the objective lens 505.
- the lens driving element 506 includes a piezo element that is driven in accordance with a driving signal to which a tracking driving circuit force (not shown) is also supplied, and moves the position of the objective lens 505 in the tracking direction or the focusing direction.
- the lens driving element 506 includes a piezo element having high-speed reactivity, the phase of the groove track GT which swings relatively fast (ie, swings at high frequency) is opposite to that of the swinging of the groove track GT. It is possible to form a recording pit row that swings in phase.
- the signal recording / reproducing means 353 includes a signal processing circuit 511, a phase delay circuit 512, and a gain circuit 513.
- the signal processing circuit 511 generates a recording signal by adding, for example, a correction code for error correction or applying predetermined modulation to the recording data supplied from the host computer 400. To do.
- the phase delay circuit 512 constitutes one specific example of the “delay adding means” in the present invention, and applies a phase delay to the recording signal output from the signal processing circuit 511. Specifically, the timing of the swing of the groove track GT is detected from the received light signal generated in the PD502, and the phase is detected, and the recording is performed with the phase opposite to the swing phase of the groove track GT. A phase delay is applied to the recording signal so that a pit row can be formed. In particular, since the groove track GT of the optical disc 100 swings at a fixed period! /, It is possible to form a recording pit train that swings at a phase shifted by a half cycle with respect to the phase of the groove track GT. Apply phase delay to the recorded signal.
- the gain circuit 513 constitutes a specific example of the “gain adjusting means” in the present invention, and adjusts the gain of the recording signal output from the signal processing circuit 511. Specifically, the amplitude of the swing of the groove track GT is detected from the received light signal generated in the PD502, and a recording pit row having an amplitude approximately twice the amplitude of the swing of the groove track GT can be formed. Next, adjust the gain of the recording signal.
- the recording pit train oscillates in a phase opposite to the oscillating phase of the group track GT.
- Amplitude force It is possible to suitably form a recording pit row that is approximately twice the amplitude of the swing of the groove track GT.
- FIG. 8 is a plan view conceptually showing a recording pit row formed on the circular track GT.
- FIG. 5 is a waveform diagram conceptually showing a waveform of a push-pull signal obtained by reproducing an optical disc 100 on which a recording pit row is formed.
- the land track LT is omitted for simplicity of explanation.
- the groove track GT of the optical disc 101 is subjected to BPM (Bi Phase Modulation) modulation.
- BPM Bi Phase Modulation
- the information recording / reproducing apparatus 200 forms a recording pit train that swings in a phase opposite to the phase of the swing of the groove track GT.
- the swing amplitude A4 of the recorded pit train is approximately twice the swing amplitude A3 of the groove track GT.
- the optical disc 100 in which such a recording pit row is formed is reproduced, it is caused by the signal component caused by the groove track GT shown in FIG. 9 (a) or the recording pit row shown in FIG. 9 (b).
- the signal component is acquired. Since the phase of the swing of the groove track GT and the phase of the swing of the recording pit row are opposite to each other, the signal component due to the groove track GT and the signal component due to the recording pit row are opposite to each other. Vibrate. Since the swing amplitude A4 of the recording pit row is approximately twice the swing amplitude A3 of the groove track GT, the amplitude S4 of the signal component caused by the recording pit row and the groove track GT The resulting signal component amplitude S3 is substantially the same.
- the push-pull signal (that is, the sum signal of the signal component attributed to the groove track GT and the signal component attributed to the recording pit train) actually acquired by the information recording / reproducing apparatus 200 during the reproducing operation is As shown in FIG. 9 (c), the signal includes only a DC component. Therefore, even such an optical disc 101 can enjoy the various benefits described above.
- the power described for the optical disc 100 as an example of the information recording medium and the recorder related to the optical disc 100 as an example of the information recording device is not limited to the optical disc and the recorder.
- the present invention can also be applied to other high-density recording or various information recording media compatible with high transfer rates and their recorders.
- the present invention is not limited to the above-described embodiments, but can be modified as appropriate without departing from the gist or concept of the invention which can be read and accompanied by such changes.
- An information recording medium, an information recording apparatus and method, and a computer program for recording control are also included in the technical scope of the present invention.
- the information recording medium, the information recording apparatus, the information recording method, and the computer program according to the present invention can be used for, for example, a DVD recorder and the like, and can be used for an information recording apparatus such as a DVD recorder. Further, the present invention can also be used for an information recording device or the like that is mounted on various consumer or commercial computer devices or can be connected to various computer devices.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Head (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/918,169 US20090028041A1 (en) | 2005-04-13 | 2006-04-13 | Information Recording Medium, Information Recording Apparatus and Information Recording Method, and Computer Program |
JP2007526836A JP4493051B2 (ja) | 2005-04-13 | 2006-04-13 | 情報記録媒体、情報記録装置及び情報記録方法、並びにコンピュータプログラム |
Applications Claiming Priority (2)
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JP2005115516 | 2005-04-13 | ||
JP2005-115516 | 2005-04-13 |
Publications (1)
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WO2006112351A1 true WO2006112351A1 (ja) | 2006-10-26 |
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PCT/JP2006/307825 WO2006112351A1 (ja) | 2005-04-13 | 2006-04-13 | 情報記録媒体、情報記録装置及び情報記録方法、並びにコンピュータプログラム |
Country Status (4)
Country | Link |
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US (1) | US20090028041A1 (ja) |
JP (1) | JP4493051B2 (ja) |
CN (1) | CN101160622A (ja) |
WO (1) | WO2006112351A1 (ja) |
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KR20080089005A (ko) * | 2007-03-30 | 2008-10-06 | 삼성전자주식회사 | 기록형 광 정보 저장매체 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01258244A (ja) * | 1987-12-10 | 1989-10-16 | Fuji Photo Film Co Ltd | 情報記録媒体,光情報記録方法および光情報記録再生方法 |
JP2001216655A (ja) * | 2000-02-02 | 2001-08-10 | Sony Corp | 光記録媒体、光記録媒体製造用原盤及び記録再生方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05298697A (ja) * | 1992-04-22 | 1993-11-12 | Ricoh Co Ltd | 光ディスク及び光ディスク原盤露光装置 |
JP2856390B2 (ja) * | 1996-07-26 | 1999-02-10 | 株式会社日立製作所 | 情報記録媒体及びそれを用いた記録再生方法 |
JPH11175979A (ja) * | 1997-12-12 | 1999-07-02 | Sony Corp | クロック生成装置、クロック生成方法及び光ディスク |
JP3819159B2 (ja) * | 1998-09-03 | 2006-09-06 | パイオニア株式会社 | プリピット信号生成装置及び情報記録装置 |
US6847594B1 (en) * | 2000-02-07 | 2005-01-25 | Samsung Electronics Co., Ltd. | Recording medium having wobbled groove tracks out of phase with wobbled land tracks, servo controlling apparatus using wobble signal and method thereof |
JP2001202629A (ja) * | 2000-01-21 | 2001-07-27 | Sharp Corp | 光学式情報記録媒体 |
JP3962522B2 (ja) * | 2000-02-14 | 2007-08-22 | パイオニア株式会社 | 情報記録媒体 |
JP2003296942A (ja) * | 2002-03-29 | 2003-10-17 | Sony Corp | 光ディスク、光ディスクの製造方法及び装置、並びに光ディスク記録方法 |
JP4098572B2 (ja) * | 2002-07-09 | 2008-06-11 | パイオニア株式会社 | 記録用クロック信号発生装置およびその方法 |
KR100727919B1 (ko) * | 2003-02-03 | 2007-06-14 | 삼성전자주식회사 | 광정보 저장매체 |
-
2006
- 2006-04-13 WO PCT/JP2006/307825 patent/WO2006112351A1/ja active Application Filing
- 2006-04-13 CN CNA2006800124506A patent/CN101160622A/zh active Pending
- 2006-04-13 JP JP2007526836A patent/JP4493051B2/ja not_active Expired - Fee Related
- 2006-04-13 US US11/918,169 patent/US20090028041A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01258244A (ja) * | 1987-12-10 | 1989-10-16 | Fuji Photo Film Co Ltd | 情報記録媒体,光情報記録方法および光情報記録再生方法 |
JP2001216655A (ja) * | 2000-02-02 | 2001-08-10 | Sony Corp | 光記録媒体、光記録媒体製造用原盤及び記録再生方法 |
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JPWO2006112351A1 (ja) | 2008-12-11 |
US20090028041A1 (en) | 2009-01-29 |
JP4493051B2 (ja) | 2010-06-30 |
CN101160622A (zh) | 2008-04-09 |
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