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45results about "Track shape" patented technology
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Optical recording medium having pits that are formed with respect to a wobbled groove at substantially constant positions in each cycle of the groove having a pit
InactiveUS6075761AAccurate acquisitionHigh densityFilamentary/web record carriersRecord information storageHigh densityEngineering
An optical recording medium for accurately deriving the address information or the disc rotation control information despite narrow track pitch and for recording signals to a high density, and a method and apparatus for recording and / or reproducing such optical recording medium. The optical recording medium has a wobbled groove and pits formed at a pre-set interval in an area between turns of the wobbled groove. The recording / reproducing method includes controlling rotation of the optical recording medium by a wobbled signal from the groove and detecting the position on the optical recording medium of a recording signal by pit signals detected from the pits. The recording / reproducing apparatus includes a detection device for detecting the wobbled signal from the groove and a detection device for detecting pit signals from the pits. The rotation of the optical recording medium is controlled by the wobbled signals detected from the groove and the position on the optical recording medium of the recording signal is detected by the pit signal detected from the pits.
Owner:SONY CORP +2
Optical recording medium with wobbled grooves and interconnecting pits
InactiveUS6282166B1Accurate acquisitionHigh densityRecord information storageGrooves/tracks dimensionsHigh densityEngineering
Owner:PIONEER DISPLAY PROD CORP
Rewritable data storage medium having erasable identification marks
InactiveUS6986150B2Easy to implementLow spatial frequencyCombination recordingOptical re-recordingData recordingRecording layer
The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4′) other than the data recording area (5). The data recording area (5) has a first tracking structure (8′), whereas the identification mark area (4, 4′) is substantially free from a tracking structure or has a second tracking structure (8″) substantially different from the first tracking structure (8′).Thus erasure of the identification mark is practically impossible, because the location of the erasing spot of a recorder cannot be controlled precisely in radial direction.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Record carrier, playback device and method of recording information
InactiveUS7054245B2Reliably retrievedTight tolerances on the parameters of the track can effectively beTelevision system detailsFilamentary/web record carriersModulation patternControl data
A record carrier has substantially parallel tracks having first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, this information being recoverable by a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling the type of data processing. In respect of a code track that includes the modulation pattern, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track. Thereby crosstalk due to the second variations is decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator (50) and a control unit (56) for retrieving the code from at least two tracks.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Optical disc, optical disc recording apparatus and method, optical disc reproducing method
InactiveUS20050128905A1Overcomes drawbackDisc-shaped record carriersFilamentary/web record carriersLight beamSynthetic resin
Owner:SONY CORP
Optical disk recording medium, optical disk device, and recording method
InactiveUS20140160908A1Improve recording densityHigh optical densityRecording carrier detailsRecord information storageComputer scienceOptical disc
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Information recording medium, information recording method, information recording device, information playback method, and information playback device
ActiveUS20160343394A1High track densityEffectively ensureMultilayered discsRecording carrier detailsComputer hardwareRecording layer
A write-once type information recording medium according to one aspect of the present disclosure includes at least one recording layer. In the information recording medium, the at least one recording layer has a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track is divided into blocks each of which being minimum unit in which recording is performed, and the information recording medium includes a management information area where management information is recorded and a user data area where user data is recorded. Each of the management information areas of both the land track and the groove track on each recording layer of the at least one recording layer is disposed at a same distance from the center of the information recording medium.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Optical disc medium and optical disc device
ActiveUS20150179207A1High densityReduce the impactRecording carrier detailsRecord information storageComputer scienceOptical disc
An optical disc medium includes a land and a groove at which information can be recorded. A predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium. The address information unit of the land includes three or more address recording areas capable of recording address information. The address information is recorded on one area selected from among the three or more address recording areas. The address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove. The one area to be selected from among the three or more address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Optical disc medium and optical disc device
ActiveUS20160111122A1Improve recording densityReduce impactTelevision system detailsRecording carrier detailsComputer scienceOptical disc
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Optical disc medium and optical disc device
ActiveUS20160111121A1Improve recording densityReduce impactRecording carrier detailsRecord information storageComputer scienceOptical disc
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Optical disc and optical disc address reading apparatus and method
InactiveUS7035189B2Efficient and accurate readingTelevision system detailsOptical beam sourcesComputer hardwareOptical disc
Owner:PANASONIC CORP
Optical information recording medium and optical information recording medium playback apparatus
The invention refers to an optical information recording medium and an optical information recording medium playback apparatus. The invention discloses the optical information recording medium operated by CAV or zone CAV, wherein a groove that wobbles is formed in advance, and information is recorded in the groove and a land adjacent to the groove, an address is recorded by a wobble signal of the groove, the groove is alternately provided with a first section recording an address N by the wobble signal, and a second section recording an address (N-1) or (N+1) by the wobble signal, in two groove tracks sandwiching a land track, the first section of one of the groove tracks matches the second section of the other of the groove tracks, and an address of the groove is read from the first section, and an address of the land is read from the first and the second sections located on both sides of the land track, and recording a same address.
Owner:SONY CORP
Optical information recording medium, recording and reproduction method, and recording and reproduction device
ActiveUS20140036652A1Influence can be suppressedImprove reliabilityRecord information storageGroove/land recordingGroove widthBpsk modulation
In the land-groove method, wobble interference is reduced. STW modulation is used as wobble modulation for a part where wobble interference can occur, for example, a part where the configurations of both side walls of the groove are not the same and groove width modulation is unavoidable. Thereby, the amplitude of the groove width modulation can be suppressed to a quarter of that when BPSK modulation is used.
Owner:HITACHI CONSUMER ELECTRONICS CORP +1
Optical recording medium
An optical recording medium having a wobble desirably arranged in a production process when having wobble at part of interfaces of lands and grooves is provided. An optical recording medium comprising an approximately disk-shaped disk substrate 15, formed in its surface with trenches 15a and having projections and recesses divided for every track region by the trenches 15a, on which are stacked an optical recording layer 16 having relief shapes corresponding with the trenches 15a and a protection film 17 and of a format where both regions of the projections (lands L) and the recesses (grooves G) are used as recording regions etc., wherein wobble W for providing clock information or address information is formed, between a pair of facing side walls forming each trench 15a, in a side wall portion at an inner circumferential side of the disk substrate 15 when seen from the recess (groove G) and at an outer circumferential side of the disk substrate 15 when seen from the projection (land L).
Owner:SONY CORP
Optical disc having positive marks and negative marks in a sector block
InactiveUS6898175B2More informationLess modificationModification of read/write signalsMagneto-optical discsEngineeringOptical disc
An optical disc is provided having marks for dispersed addresses that can be easily detected with high precision. A dispersed address includes synchronization marks, positive marks, and negative marks. The synchronization marks, positive marks, and negative marks are formed along a groove as partial discontinuities or partial modifications in the wobbled groove.
Owner:PANASONIC CORP
Phase error detector and optical disc device
ActiveUS20160189745A1Residue reductionHigh gainFilamentary/web record carriersRecord information storagePhase detectorPhase difference
A phase error detector includes a sine wave generation circuit that generates a sine wave signal, based on a first input signal of a first period, a cosine wave generation circuit that generates a cosine wave signal, based on the first input signal, a first calculator that calculates a phase difference between the sine wave signal and a second input signal of a second period, a second calculator that calculates a phase difference between the cosine wave signal and the second input signal, and a first selection unit that outputs the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is within a predetermined range, and outputs a predetermined value having a same sign as a sign of the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is out of the predetermined range.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Optical disc and optical disc drive
InactiveCN1291406CDisc-shaped record carriersRecord information storageComputer hardwareHigh density
An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.
Owner:SONY CORP +3
Optical disk recording method, optical disk apparatus, and optical disk medium
ActiveUS20160293200A1Record information storageDigital signal formattingComputer scienceOptical disc
A track of an optical disk is formed by wobbling and divided into zones, a clock ratio of a recording clock to a wobble clock is preset for each zone, a wobble signal is detected from the optical disk, the wobble clock is generated from the wobble signal, a present position is identified by reproducing ADIP indicating a position of the track from the wobble signal and the wobble clock, the recording clock is generated with respect to the wobble clock, a data address present position is identified from the present position, a start end position of the ADIP in a recording target zone, a start end position of the data address in the recording target zone, and the clock ratio, a recording start position is identified based on the data address present position; and the data is recorded from the recording start position of the recording target zone.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Optical information recording medium and reproducing apparatus
InactiveCN103456325ARecord information storageUsing detectable carrier informationHarmonicFundamental frequency
An optical information recording medium on which recording address information is performed by a CAV or a zone CAV system, wherein a groove wobbling continuously is formed in advance to record the information to the groove and a land abutting the groove, the address information is recorded by a wobble where a plurality of modulated waves modulated by the address information are multiply formed, the modulated wave is a higher harmonic wave whose frequency is a fundamental wave of the fundamental frequency of the wobble, or an integer times the fundamental frequency of the wobble, one modulated wave is modulated by the address information of one land of the abutting lands which interpose the groove, and the other modulated wave is modulated by the address information of the other land of the abutting lands which interpose the groove.
Owner:SONY CORP
Information recording medium and disc
InactiveCN103943118AReduced characteristicsRecord information storageTrack shapePhasonComputer science
Owner:SONY CORP
Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof
InactiveCN1206630CFast accessEasy to manufactureOptical flying-type headsOptical beam sourcesWavelengthData recording
An apparatus for recording user data to and / or reproducing user data from an optical disc, the apparatus comprising an optical head for directing a laser beam having a wavelength of about 680 nm or less to the optical disc, the optical head having about Objectives with numerical apertures of 0.7 or greater and working distances of 560 μm or less. By utilizing such devices, a relatively large amount of data can be recorded onto an optical disc.
Owner:SONY CORP
Record carrier, playback apparatus and information system comprising a record carrier and a playback apparatus
InactiveCN101101777BDisc-shaped record carriersSignal processing to reduce distortionsTransducerEngineering
A playback apparatus (20) includes a transducer unit (20A, 20B, 20C) for scanning a record carrier (1). The transducer unit is adapted to detect first variations and second variations. The apparatus further includes a first recovery unit (22) coupled to the transducer unit for recovering a clock signal (CL) from the first variations and a second recovery unit (23) coupled to the transducer unit for recovering an information signal (S<out>) from the first variations. The apparatus further includes a detection unit (24) for detecting whether said second variations exhibit a predetermined variation pattern on the basis of at least one signal (SA) originating from said transducer unit. The detection unit (24) using said clock signal (CL) generated by the first recovery unit (22) for detection. Further an enabling unit (5) is included for enabling said second recovery unit (23) to recover the information signal (S<out>) when said detection unit detects (24) said predetermined variation pattern.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Optical information recording medium and optical information recording medium reproducing device
ActiveUS9484053B2Record information storageUsing detectable carrier informationEngineeringRecording media
Owner:SONY CORP
Optical information recording medium and optical information recording medium reproducing device
ActiveUS20150103640A1Record information storageUsing detectable carrier informationEngineeringRecording media
Owner:SONY CORP
Optical information recording medium and optical information recording medium reproducing apparatus
InactiveCN103456324ARecord information storageUsing detectable carrier informationWave shapeWave form
An optical information recording medium of a CAV or a zone CAV, in which a groove wobbling continuously is formed in advance so as to record information to a groove and a land abutting the groove, the groove alternately has a first wobble position in which a wobble fundamental wave form has been modulated by groove address information, and a second wobble position of the wobble fundamental wave form, and in grooves of both sides by which the land is interposed, the first wobble position and the second wobble position are different from each other in position.
Owner:SONY CORP
Rewritable data storage medium
The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4') other than the data recording area (5). The data recording area (5) has a first tracking structure (8'), whereas the identification mark area (4, 4') is substantially free from a tracking structure or has a second tracking structure (8') substantially different from the first tracking structure (8'). Thus erasure of the identification mark is practically impossible, because the location of the erasing spot of a recorder cannot be controlled precisely in radial direction.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Optical disc and optical disc address reading apparatus and method
InactiveCN1560863AEfficient Read DispersionCorrectly read scatterModification of read/write signalsMagneto-optical discsComputer hardwareOptical disc
Owner:PANASONIC CORP
High-density read-only optical disk
Owner:SAMSUNG ELECTRONICS CO LTD
An optical tape with an increased track pitch for improvement of tracking performance after seam
ActiveCN109313913ARecord information storageSystems characterised by carrier shapeComputer hardwareData store
In at least one embodiment, an optical data storage tape is provided. The optical data storage tape includes a read / write data area including a plurality of writeable tracks for storing data thereon,each writeable track having a first track width. The optical data storage tape further includes a seam area positioned proximate to the read / write data area. The seam area comprises a plurality of non-writeable tracks, each non-writeable track including a second track width that is greater than the first track width for each writeable track.
Owner:ORACLE INT CORP
Optical disk and optical disk apparatus
InactiveCN1305036CEasy accessRecord information storageOptical recording/reproducing/erasing methodsComputer hardwarePhysical address
Physical addresses of the recording areas provided on an optical disc are represented in the first format that is time-axis data and the second format that is binary data. The physical address value gradually increases from the inner most part toward the outermost part of this disc, while the first format and the second format remains in one-to-one correspondence over the entire recording areas. The distance the optical head must move to reach the target recording area can therefore be calculated easily, no matter where on the disc the optical head is located at present. This enables the optical head to make a fast access to the target recording area.
Owner:SONY CORP
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