WO1998024089A1 - Support d'enregistrement optique - Google Patents

Support d'enregistrement optique Download PDF

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Publication number
WO1998024089A1
WO1998024089A1 PCT/IB1997/001470 IB9701470W WO9824089A1 WO 1998024089 A1 WO1998024089 A1 WO 1998024089A1 IB 9701470 W IB9701470 W IB 9701470W WO 9824089 A1 WO9824089 A1 WO 9824089A1
Authority
WO
WIPO (PCT)
Prior art keywords
state
region
track
recording medium
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB1997/001470
Other languages
English (en)
Inventor
Johannes Hendrikus Maria Spruit
Johan Philippe William Beatrice Duchateau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Philips Norden AB
Original Assignee
Philips Electronics NV
Philips Norden AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electronics NV, Philips Norden AB filed Critical Philips Electronics NV
Priority to EP97910604A priority Critical patent/EP0880777A1/fr
Priority to JP10524472A priority patent/JP2000504465A/ja
Publication of WO1998024089A1 publication Critical patent/WO1998024089A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G11B7/24—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
    • G11B7/24079—Width or depth
    • 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
    • G11B7/0051—Reproducing involving phase depth effects
    • 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

Definitions

  • the invention relates to an optical recording medium for writing and reading information by means of a radiation beam having a predetermined wavelength, comprising a recording layer, the recording layer changing between a first and a second state upon irradiation by a radiation beam, the recorded information being represented by written marks in the second state in a region in the first state, the marks being arranged in tracks comprising a guide groove having a depth, a first optical phase difference existing on reflection from a region on track in the first state and from a region on track in the second state, the first optical phase difference enhancing an optical phase difference between a region in between tracks in the first state and a region on track in the first state.
  • Information may be stored in the recording medium by a scanning device having an optical head.
  • the head focuses a radiation beam onto the information layer in the medium and follows an unwritten track by means of tracking information derived from the groove in the track.
  • the grooves are circular or spiral and the tracking information is in the form of a radial tracking error signal.
  • the information is written in the track in the form of optically detectable marks.
  • the radiation beam has a relatively low power, which, on reflection from the information layer, is modulated by the marks.
  • the tracking information during reading may be derived from the grooves or from the written information.
  • An optical recording medium according to the preamble is known from the Japanese patent application JP-A 5174380.
  • This medium comprises a stack of optical thin layers in which the recording layer is embedded.
  • the thickness of a transparent layer of the stack adjacent the recording layer is tuned such that the first optical phase difference between unwritten and written regions of a track increases the optical phase difference between a region in between tracks in the first state and a region on track also in the first state. This relation between the phase differences increases the information signal derived from the scanned marks.
  • a disadvantage of the known recording medium is that the tracks cannot properly be followed by a scanning device using the so-called phase-detection method for deriving a tracking signal from marks written in the information layer.
  • the method of deriving tracking information by using high-frequency phase detection is known from inter alia United States patent no. 4 785 441.
  • the recording medium according to the preamble is characterized in that the depth of the guide groove is in the range from 1/24 to 1/7 times the wavelength and the first optical phase difference is in the range from 0.4 to 2.0 radian.
  • the phase-detection method requires a relatively shallow groove.
  • the minimum groove depth is set by the requirement that a scanning device must be able to derive tracking information from it.
  • the combination of the groove depth and the first optical phase difference defines a parameter range in which tracking information can be derived properly according to the phase-detection method.
  • the first optical phase difference is preferable in the range from 0.4 to
  • a medium having a phase difference smaller than this value will show an asymmetric tracking signal as derived by the phase-detection method.
  • the asymmetry shows up as different amplitudes of the tracking signal when the radiation beam is focused below and above the recording layer.
  • a possible measure of the asymmetry is (x-y)/(2z), where x is the maximum value of the phase-detection tracking error signal when the radiation beam is focused 1 ⁇ m above the information plane, y the maximum value of the phase-detection tracking error signal when the radiation beam is focused 1 ⁇ m below the information plane and z the maximum value of the phase-detection tracking error signal when the radiation beam is focused on the information plane.
  • a further improvement of the phase-detection tracking signal can be achieved when a ratio of an intensity reflection of a region on track in the second state and of a region on track in the first state is larger than 0.15.
  • a medium is called a dark- writing medium.
  • a so-called white- writing medium has preferably a ratio of the intensity reflection of a region on track in the first state and of a region on track in the second state larger than 0.15.
  • the symmetry of the tracking signal as derived by the phase-detection method is improved when the ratio lies within the range from 0.3 to 0.5 for both dark- and white-writing media.
  • the intensity reflection of a region on track in the first state is preferably larger than 0.15 for a dark-writing medium, in order to be able to derive a good information signal from the radiation reflected from the information layer.
  • the intensity reflection of a region on track in the second state is preferably larger than 0.15.
  • the groove in the information layer may be used for storing information such as addresses used in accessing the information. Such information may be stored in the form of a wobble in the depth or position of the groove.
  • the depth of the groove is then preferably in the range from 1/12 to 1/7 times the wavelength of the radiation beam.
  • the optical phase difference of the medium may be realized by embedding the recording layer in a stack of optical thin layers and tuning the thicknesses of the layers.
  • the design of the stack is facilitated when the material of the recording layer in the first state has an imaginary part of the refractive index larger than 3.4.
  • the material of the recording layer is preferably of a phase-change type.
  • the writing speed can be relatively high when amorphous marks are written in a crystalline layer.
  • the first state is then a crystalline state and the second state an amorphous state.
  • Figure 1 shows a cross-section of a recording medium according to the invention
  • Figure 2 shows a plan view of the recording layer of the medium
  • Figure 3 shows a scanning device for scanning media according to the invention
  • Figure 4A shows the circuit of the device for forming a push-pull radial tracking error signal
  • Figure 4B shows the circuit of the device for forming a DTD radial tracking error signal.
  • Figure 1 shows an information recording medium 1 according to the invention designed for writing and reading information by means of a focused radiation beam having a design wavelength.
  • Medium 1 comprises a transparent substrate 2 and a recording layer 3.
  • the recording layer may be scanned by a radiation beam through substrate 2.
  • Recording layer 3 is embedded in a stack 4 of optical thin layers arranged on substrate 2.
  • the stack comprises from the substrate side a transparent interference layer 5, recording layer 3, a further interference layer 6, and a reflective layer 7.
  • Stack 4 is shielded from environmental influences by a protective layer 8.
  • Substrate 2 comprises a groove pattern on the side on which stack 4 is arranged.
  • the groove pattern has circular or spiral grooves.
  • the part of the groove pattern forming a depression in the substrate when viewed from the side of the stack is called a groove 9.
  • the part of the pattern forming a raised part from the same point of view is called a land 10.
  • the thickness of the layers in stack 4 is so small that the pattern on the substrate 2 is also present in recording layer 3.
  • the substrate of the recording medium is made of polycarbonate (PC) having a refractive index of 1.58 at the design wavelength of 670 nm.
  • Interference layer 5 is a 90 nm thick layer of 80% ZnS and 20% SiC ⁇ having a refractive index of 2.13.
  • Recording layer 3 is a 30 nm thick layer of a GeSb 2 Te 4 phase-change material having a refractive index of 4.26 - i 1.69 when in the amorphous state and 4.44 - i 3.08 when in the crystalline state.
  • Interference layer 6 is a 30 nm thick layer of the same material as interference layer 5.
  • Reflective layer 7 is a 100 m thick layer of an aluminium alloy having a refractive index of 1.98 - i 7.81.
  • the depth of grooves 9 is 40 nm, the width of the grooves is 500 nm and the pitch of the grooves, being the track pitch is 900 nm.
  • Figure 2 shows part of recording layer 3 having grooves 9 and lands 10.
  • the information is written in the grooves.
  • Recording layer 3 is initially in the crystalline state.
  • amorphous regions 11, called marks are made in the recording layer.
  • the length and position of the marks represent the information recorded in the medium.
  • the intensity reflection of stack 4 in a region of the recording layer in the amorphous state is equal to 0.07.
  • the intensity reflection of stack 4 in a region in the crystalline state is equal to 0.18.
  • the ratio of the amorphous reflection over the crystalline reflection is thus 0.39. Both intensity reflections have been measured by means of a focused radiation beam in regions without grooves.
  • Radiation reflected from a region in track and in the crystalline state is delayed in phase by 1.2 radian compared to radiation reflected from a region 'b' in between tracks and also in the crystalline state.
  • Radiation reflected from a region in track and in the amorphous state is delayed in phase by 0.6 radian compared to radiation reflected from a region in between tracks and in the crystalline state.
  • the phase difference between the land and groove is enhanced by the phase difference between mark and regions in between marks.
  • the effective depth of the groove is enhanced at the location of the marks.
  • the push-pull tracking error signal has a measured maximum value of
  • the phase-detection tracking error signal has a maximum value of 0.24, measured by a scanning device described below.
  • the value of the tracking error signal is a time difference normalized on the channel clock period used for writing the information on the recording medium.
  • the substrate of the recording medium is again made of polycarbonate (PC) having a refractive index of 1.58 at the design wavelength of 670 nm.
  • the stack has the same order of layers as shown in Figure 1.
  • Interference layer 5 is a 95 nm thick layer of 80% ZnS and 20% Si0 2 having a refractive index of 2.13.
  • Recording layer 3 is a 25 nm thick layer of a GeSb 2 Te 4 phase-change material having a refractive index of 4.26 - i 1.69 when in the amorphous state and 4.44 - i 3.08 when in the crystalline state.
  • Interference layer 6 is a 35 nm thick layer of the same material as interference layer 5.
  • Reflective layer 7 is a 100 m thick layer of an aluminium alloy having a refractive index of 1.98 - i 7.81.
  • the depth of grooves 9 is 55 nm, the width of the grooves is 400 nm and the pitch of the grooves is 900 nm.
  • the information is written in the grooves in the form of amorphous marks in a crystalline surroundings.
  • the intensity reflection of stack 4 in a region of the recording layer in the amorphous state is equal to 0.05.
  • the intensity reflection of stack 4 in a region in the crystalline state is equal to 0.16.
  • the ratio of the amorphous reflection over the crystalline reflection is thus 0.31. Both regions are without grooves.
  • Radiation reflected from a region in track and in the crystalline state, 'a' in Figure 2 is delayed in phase by 1.6 radian compared to radiation reflected from a region in between tracks and also in the crystalline state.
  • Radiation reflected from a region in track and in the amorphous state, 'c' in Figure 2 is delayed in phase by 0.7 radian compared to radiation reflected from a region in track and in the crystalline state, 'b' in Figure 2.
  • the push-pull tracking error signal has a measured maximum value of 95 % of the value obtained for a medium having a groove depth optimized for a maximum push-pull signal.
  • the phase-detection tracking error signal has a maximum value of 0.24.
  • the substrate of the recording medium is again made of polycarbonate (PC) having a refractive index of 1.58 at the design wavelength of 670 nm.
  • the stack has the same order of layers as shown in Figure 1.
  • Interference layer 5 is a 70 nm thick layer of 80% ZnS and 20% SiO 2 having a refractive index of 2.13.
  • Recording layer 3 is a 25 nm thick layer of a GeSb 2 Te 4 phase-change material having a refractive index of 4.40 - i 1.96 when in the amorphous state and 4.65 - i 3.81 when in the crystalline state.
  • Interference layer 6 is a 25 nm thick layer of the same material as interference layer 5.
  • Reflective layer 7 is a 100 m thick layer of aluminium having a refractive index of 1.98 - i 7.81.
  • the depth of grooves 9 is 51 nm, the width of the grooves is 500 nm and the pitch of the grooves is 870 nm.
  • the information is written in the grooves in the form of amorphous marks in a crystalline surroundings.
  • the intensity reflection of stack 4 in a region of the recording layer in the amorphous state is equal to 0.043.
  • the intensity reflection of stack 4 in a region in the crystalline state is equal to 0.17.
  • the ratio of the crystalline reflection over the amorphous reflection is thus 0.25. Both regions are without grooves.
  • Radiation reflected from a region in track and in the crystalline state is delayed in phase by 1.5 radian compared to radiation reflected from a region in between tracks and also in the crystalline state. Radiation reflected from a region in track and in the amorphous state, 'c' in Figure 2, is delayed in phase by 0.8 radian compared to radiation reflected from a region in between tracks and also in the crystalline state.
  • the push-pull tracking error signal has a measured maximum value of 95 % of the value obtained for a medium having a groove depth optimized for a maximum push-pull signal.
  • the phase-detection tracking error signal has a maximum value of 0.3.
  • Stack 4 may have various forms.
  • a further reflective layer may be arranged between substrate 2 and interference layer 5 of stack 4 as shown in Figure 1.
  • a further interference layer and reflection layer may be interposed between the stack and the substrate.
  • the stack may also comprise only layers 3, 4 and 5, which stack is very suitable for write-once media.
  • the material of the recording layer may be a phase-change material, a dye, or any other material suitable for optically writing information in.
  • Figure 3 shows an optical scanning device suitable for writing and reading information from the media according to the invention.
  • the figure shows a part of record carrier 1 comprising embossed information in the form of pits and bumps.
  • the information layer is scanned through substrate 2.
  • the record carrier may comprise more than one information layer, arranged one above the other.
  • the apparatus comprises a radiation source 12, for instance a semiconductor laser, emitting a radiation beam 13.
  • the radiation beam is focused on information layer 3 by an objective system 14, for sake of simplicity shown in the Figure as a single lens.
  • Radiation reflected by the information layer is directed towards a detection system 15 via a beam-splitter.
  • the beamsplitter may be a semi-transparent plate, a diffraction grating and may be polarization-dependent.
  • the detection system converts the incident radiation into one or more electrical signals, which are fed into an electronic circuit 16 to derive an information signal S f representing information read from the record carrier, and control signals.
  • One of the control signals is the radial tracking error signal S r , representing the distance between the centre of the spot formed by the radiation beam on the information plane and the centre-line of the track being scanned.
  • Another control signal is a focus error signal S f , representing the distance between the focal point of the radiation beam and the information plane.
  • the two error signals are fed into a servo circuit 17, which controls the position of the focal point of the radiation beam.
  • the focus control is realized by moving objective system 14 in the direction of its optical axis in response to the focus error signal
  • the radial tracking is realized by moving the objective system in a direction transverse to the tracks in response to the radial tracking error.
  • the intensity of the radiation source is modulated by the information to be recorded.
  • Figure 4 shows the layout of the detection system 15 and part of the associated electronic circuit 16 for deriving a radial tracking error signals from the detector o signals.
  • Figure 4 A shows the circuit for deriving a radial tracking error signal according to the push-pull method.
  • the detection system 15 comprises a quadrant detector having four radiation-sensitive detection elements A, B, C and D.
  • the detector signals from detector elements A and B are added and amplified in an amplifier 18.
  • the detector signals from detector elements C and D are added and amplified by an amplifier 19.
  • the outputs of amplifiers 18 and 19 are connected to a differential amplifier 20, forming the difference of the two input signals.
  • the output signal of differential amplifier 20 is the push-pull radial tracking error signal S r (PP).
  • FIG. 4B shows the circuit for deriving a radial error signal according to a high-frequency phase-detection method.
  • the detector signals from elements A and C of detection system 15 are added and amplified in amplifier 21.
  • the output of amplifier 20 is fed into a slicer 22.
  • the slicer detects level-crossings of the input signal with a detection level, thereby digitizing the input signal.
  • the detector signals of elements B and D of detection system 20 are added and amplified in an amplifier 23, the output of which is connected to an input of a slicer 24.
  • the output signals of amplifier 21 and 23 may be shaped by equalizers to compensate for effects of the response of the optical system of the scanning device on the detector signals, before being fed into slicer 22 and 24 respectively.
  • the digital output signals of slicers 22 and 24 are fed into a phase comparator 25, which produces an output signal dependent on the phase between pulses in the two inputs of the comparator.
  • the output signal of comparator 25 is low-pass filtered by filter 26.
  • the output signal S r of filter 26 is the radial tracking error signal derived according to the diagonal time- difference (DTD) method, which a particular embodiment of the phase-detection method. This error signal is very suitable for controlling the radial tracking servo in parts of the recording medium comprising written marks.
  • DTD diagonal time- difference
  • the written tracks on a recording medium according to the invention can also be followed using a radial tracking error signal derived according to other high- frequency phase-detection methods, such as the analog version of the method shown in Figure 4B, or the analog or digital version of the phase-detection method known from inter alia United States patent no. US 4 785 441.

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  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

Cette invention se rapporte à un support d'enregistrement optique comportant une couche d'enregistrement rainurée. La structure des pistes non écrites doit permettre à un dispositif de balayage de dériver un signal d'erreur de poursuite radiale selon la méthode push-pull. La structure des pistes écrites doit permettre au dispositif de balayage de dériver un signal d'erreur de poursuite radiale selon la méthode de détection de phase haute fréquence. A cet effet, la profondeur de la rainure est comprise entre 1/24 et 1/7 fois la longueur d'onde de balayage du support d'enregistrement, et la différence de phase entre un faisceau de rayonnement réfléchi par une région de la piste comprise entre des marques écrites et un faisceau de rayonnement réfléchi à partir d'une marque est comprise entre 0,4 et 2,0 radians.
PCT/IB1997/001470 1996-11-25 1997-11-20 Support d'enregistrement optique Ceased WO1998024089A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97910604A EP0880777A1 (fr) 1996-11-25 1997-11-20 Support d'enregistrement optique
JP10524472A JP2000504465A (ja) 1996-11-25 1997-11-20 光学記録媒体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96203318.9 1996-11-25
EP96203318 1996-11-25

Publications (1)

Publication Number Publication Date
WO1998024089A1 true WO1998024089A1 (fr) 1998-06-04

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ID=8224622

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/001470 Ceased WO1998024089A1 (fr) 1996-11-25 1997-11-20 Support d'enregistrement optique

Country Status (6)

Country Link
EP (1) EP0880777A1 (fr)
JP (1) JP2000504465A (fr)
KR (1) KR100458727B1 (fr)
ID (1) ID21023A (fr)
TW (1) TW455843B (fr)
WO (1) WO1998024089A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871162A3 (fr) * 1997-04-09 1998-12-30 Ricoh Company, Ltd. Support d'enregistrement à changement de phase adapté notamment pour suivi de piste basé sur la méthode de détection différentielle de phase
EP1199716A3 (fr) * 2000-08-24 2003-05-21 Pioneer Corporation Dispositif et procédé de commande de saut de piste
US6587420B1 (en) 1997-03-27 2003-07-01 Matsushita Electric Industrial Co., Ltd. Recording and reproducing method for optical information recording medium and optical information recording medium
EP1965377A1 (fr) * 2007-03-02 2008-09-03 Deutsche Thomson OHG Support d'enregistrement optique compatible

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101039669B1 (ko) * 2009-05-18 2011-06-08 (주)옵티스 기록 미기록 영역의 디스크를 이용한 위상 조정방법

Citations (6)

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EP0548828A2 (fr) * 1991-12-20 1993-06-30 Nec Corporation Milieu d'enregistrement optique des données, et méthode d'enregistrement, d'effacement et de réproduction de celui-ci
EP0626679A2 (fr) * 1993-05-26 1994-11-30 Matsushita Electric Industrial Co., Ltd. Milieu d'enregistrement optique d'information et dispositif d'enregistrement/reproduction d'information optique
US5410534A (en) * 1992-06-17 1995-04-25 Matsushita Electric Industrial Co., Ltd. Optical information recording medium
US5493561A (en) * 1992-06-17 1996-02-20 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and information recording and reproducing method thereof
EP0737967A2 (fr) * 1995-03-28 1996-10-16 Toray Industries, Inc. Milieux d'enregistrement optique et un procédé d'enregistrement pour les milieux d'enregistrement optique
US5581539A (en) * 1994-08-12 1996-12-03 Mitsubishi Chemical Corporation Optical recording medium

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
EP0548828A2 (fr) * 1991-12-20 1993-06-30 Nec Corporation Milieu d'enregistrement optique des données, et méthode d'enregistrement, d'effacement et de réproduction de celui-ci
US5410534A (en) * 1992-06-17 1995-04-25 Matsushita Electric Industrial Co., Ltd. Optical information recording medium
US5493561A (en) * 1992-06-17 1996-02-20 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and information recording and reproducing method thereof
EP0626679A2 (fr) * 1993-05-26 1994-11-30 Matsushita Electric Industrial Co., Ltd. Milieu d'enregistrement optique d'information et dispositif d'enregistrement/reproduction d'information optique
US5581539A (en) * 1994-08-12 1996-12-03 Mitsubishi Chemical Corporation Optical recording medium
EP0737967A2 (fr) * 1995-03-28 1996-10-16 Toray Industries, Inc. Milieux d'enregistrement optique et un procédé d'enregistrement pour les milieux d'enregistrement optique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6587420B1 (en) 1997-03-27 2003-07-01 Matsushita Electric Industrial Co., Ltd. Recording and reproducing method for optical information recording medium and optical information recording medium
US6744724B2 (en) 1997-03-27 2004-06-01 Matsushita Electric Industrial Co., Ltd. Recording and reproducing method for optical information recording medium and optical information recording medium
EP0971342A4 (fr) * 1997-03-27 2006-03-29 Matsushita Electric Industrial Co Ltd Procede d'enregistrement et de reproduction pour support d'enregistrement optique d'information et support d'enregistrement optique d'information
EP0871162A3 (fr) * 1997-04-09 1998-12-30 Ricoh Company, Ltd. Support d'enregistrement à changement de phase adapté notamment pour suivi de piste basé sur la méthode de détection différentielle de phase
US6018510A (en) * 1997-04-09 2000-01-25 Ricoh Company, Ltd. Phase change recording medium for allowing a tracking servo control based on a differential phase detection tracking method
EP1258870A3 (fr) * 1997-04-09 2003-01-02 Ricoh Company, Ltd. Support d'enregistrement à changement de phase adapté au suivi de piste basé sur la méthode de détection différentielle de phase
EP1515317A3 (fr) * 1997-04-09 2005-05-18 Ricoh Company, Ltd. Procédé de contrôle de suivi de piste
EP1199716A3 (fr) * 2000-08-24 2003-05-21 Pioneer Corporation Dispositif et procédé de commande de saut de piste
US6747922B2 (en) 2000-08-24 2004-06-08 Pioneer Corporation Track-jump controlling apparatus and method
EP1965377A1 (fr) * 2007-03-02 2008-09-03 Deutsche Thomson OHG Support d'enregistrement optique compatible
WO2008107298A1 (fr) * 2007-03-02 2008-09-12 Thomson Licensing Support d'enregistrement optique compatible
US8693302B2 (en) 2007-03-02 2014-04-08 Thomson Licensing Compatible optical recording medium

Also Published As

Publication number Publication date
KR19990081945A (ko) 1999-11-15
JP2000504465A (ja) 2000-04-11
ID21023A (id) 1999-04-08
KR100458727B1 (ko) 2005-04-28
EP0880777A1 (fr) 1998-12-02
TW455843B (en) 2001-09-21

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