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183results about "Recording verification" patented technology
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Optical tape media, marking, systems, and apparatus and process for producing thereof
ActiveUS20070206477A1Facilitate spoolingRecording verificationIntegrated optical head arrangementsMagnetic tapeEngineering
Disclosed herein are aspects of optical tape technology, tape manufacturing, and tape usage. Methods and systems of tape technology disclose optical tape media including: configurations, formulations, markings, and structure; optical tape manufacturing methods, systems, and apparatus methods and systems including: curing processes, coating methods, embossing, drums, testing, tracking alignment stamper strip; optical tape methods and systems including: pick up head adapted for the disclosed optical tape; and optical tape uses including optical storage media devices for multimedia applications
Owner:ORACLE INT CORP
Optical storage device, recording method of optical storage medium and program
InactiveUS20060126460A1Combination recordingTelevision system detailsOptical storageProcessing element
A write retry processing unit repeats a write retry operation of a write and a verify, while performing a setting change of a focus offset for recording a data on an optical storage medium in case a verify error occurs in executing the write and a verify try fails. A learning processing unit retains a sum total of the number of adding times of the successful focus offset and the number of subtracting times of the successful retry offset as a learning result at the successful time of the write retry, and a write condition changing unit changes the focus offset setting value of the default so as to be drawn near to the latest focus offset which succeeds in the retry when the absolute value of the learning result retained in the learning processing unit is equal to or more than a threshold value.
Owner:FUJITSU LTD
Optical disk shred operation with detection
InactiveUS20070047395A1Easy to identifyCarry-out quicklyMultilayered discsRecording verificationConfusionData store
Data protection and security is provided by incorporating a data shredding operation which renders data previously stored on storage media unrecoverable. In the shredding operation of the present invention, certain overhead portions of a data storage sector remain unchanged, while the data area is overwritten with a predetermined pattern. By maintaining the overhead portions of the sectors (addressing, verify and protect, error correction codes, etc.) the sectors can be easily identified as being previously shredded, thus not providing a source of possible confusion to the data storage device. Further, the data becomes unrecoverable as it has been overwritten by the predetermined pattern, which thus eliminates all previously existing transitions which contained the encoded data.
Owner:PLASMON LMS
Information recording medium, information reproducing apparatus, information reproducing method and information recording method
InactiveUS20050213481A1Easy to recordPromote reproductionRecording verificationFilamentary/web record carriersRecording mediaUser information
An information recording medium includes a user information storage area which stores user information, a test write area which is extendable and for test write of information, a spare area which is extendable and capable of alternatively storing user information, and a recording position management information area including recordable range information expressing recordable ranges in the aforesaid test write area and the aforesaid spare area. The information recording medium, an information reproducing apparatus, an information reproducing method and an information recording method which make it easy to record and reproduce information properly are provided.
Owner:KK TOSHIBA
Optical information recording apparatus
InactiveUS20050265184A1Possible to detectOptimization StrategyRecording strategiesRecording verificationHistogramComputer science
An optical information recording apparatus is suitable for detection of deviation between a strategy and a record pattern. Test record is performed on an optical recordable medium using a predetermined strategy. A binarization signal that is obtained by reproducing the test record result is counted. A pit length and a land length included in the binarization signal are specified using a histogram of the count result. A plurality of the reproduction patterns is searched and extracted from a record area based at least in part on the pit length and the land length. Deviation between a strategy and a record pattern formed by the test record is detected through comparison of the obtained reproduction patterns through the search.
Owner:TAIYO YUDEN KK
Optical disk apparatus and recording parameters setting method
InactiveUS20070183285A1Shorten the timeRecording strategiesTelevision system detailsData recordingComputer science
An optical disk apparatus and a recording parameters setting method are provided to more effectively execute recording parameter learning during data recording on the optical disk, thereby shortening the time required for setting an optimum recording parameter. A phase error detection unit detects a phase error amount from a reproduction signal of actual data being recorded. A phase error adjustment unit adjusts recording parameters (recording strategy) set by a recording parameters setting unit based on the detected phase error amount. The phase error amount detection is executed simultaneously with a verify process of the actual data. If a verify process judgment results says that a target quality is not attained, test writing by a test signal is not executed but the adjustment of recording parameters is conducted on the basis of the phase error amount.
Owner:HITACHI LTD +1
Optical recording head including an optical resonant cavity
InactiveUS7365941B2Facilitate writing and reading of dataIncrease heatRecording verificationIntegrated optical head arrangementsPhotodetectorHeat sensitive
An optical recording head including a media heating device to write and read data to a heat sensitive optical media disk. The media heating device includes an optical energy resonant cavity that produces a high intensity near-field optical spot of subwavelength dimension. Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate the cavity, and optical energy is coupled out of the cavity through an aperture that is placed proximate an antinode or post within the cavity. In reading data from the optical media, a photodetector is placed at the end of the waveguide. Optical energy emitted from the end of the waveguide is influenced by the reflectivity of the media data bit, and is interpreted as the data bit signal.
Owner:HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
Information recording medium recording method, information recording/playback apparatus, and information recording medium
InactiveUS20050265199A1Avoid troubleCombination recordingTelevision system detailsComputer hardwareEqualization
In an information recording medium recording method, recording is interrupted, in recording on an information recording medium, when a predetermined interruption condition is met. A signal recorded in a recorded area is played back and a recording signal playback waveform signal is obtained. Error information indicating an error between a reference waveform signal derived by partial response equalization of a data string and the recording signal playback waveform signal is obtained. A recording condition is corrected on the basis of the error information. A recording / playback apparatus and information recording medium are also disclosed.
Owner:NEC CORP
Optical information recording apparatus
InactiveUS20050265183A1Effective inspection techniqueRecording strategiesTelevision system detailsQuality standardInformation retrieval
There is provided an effective inspection technique of recording quality decided by a combination of a drive and a media. A standard media as a quality standard for various media is recorded and reproduced for each drive, thresholds obtained by multiplying a characteristic value obtained as a result of the record reproduction by a preset factor are stored in a storage area within each drive. When a record of information in a record object media is performed, the record object media is recorded and reproduced using a plurality of recording conditions accompanied with change of a power or a pulse width, an approximation curve is obtained from a plurality of characteristic values obtained as a result of the record reproduction, and the recording quality inspection of the media is performed based on the amount of margin obtained according to a positional relationship between the approximation curve and the threshold.
Owner:TAIYO YUDEN KK
Optical recorder and laser power control method
InactiveUS6967914B2Fast formingRecording strategiesRecording verificationPower compensationOptical recording
Owner:SONY CORP
Method and apparatus of recording data on write-once recording medium
ActiveUS20060034411A1Efficient processRecording verificationError detection/correctionMicrocomputerOptical recording
Owner:LG ELECTRONICS INC
Optical information device, optical storage medium, optical storage medium inspection device, and optical storage inspection method
InactiveUS20060007828A1Reduce variationReduce impactCombination recordingRecording strategiesOptical pickupLight beam
This optical disc drive has an optical pickup head that emits a light beam to an optical storage medium, detects the light beam reflected from the optical storage medium, and outputs a signal based on the received reflected light; a jitter measuring unit for measuring jitter in signals output from the optical pickup head; and an evaluation unit for determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.
Owner:PANASONIC CORP
Reproduction method, optical disk drive, and IC circuit
InactiveUS20060262687A1Improve performanceReduce circuit sizeTelevision system detailsRecording verificationViterbi decoderReproduction speed
In an optical disk drive that is equipped with a binarization circuit by the PRML method and carries out record / reproduction at a speed higher than a standard speed, to realize reproduction compatibility between the drive and another optical disk drive by the ordinarily adopted direct slice method. It can be realized by applying verification judgment equivalent to reproduction at a standard speed in accordance with a reproduction speed. More specifically, it is realized by counting 2 T data number by the direct slice method, using a Viterbi decoder that validates a run length shorter than the minimum run length, and adopting other measures. A higher record / reproduction speed is realized while reproduction compatibility, which is an important original function of an interchangeable optical disk, is secured.
Owner:HITACHI LTD +1
Methods for optical disc sector verification
InactiveUS6973014B1Shorten the timeLessCombination recordingRecording verificationData validationSource Data Verification
A method for verifying sectors on an optical disc is provided. The method includes writing user data to unverified sectors of the optical disc and verifying the sectors of the optical disc with the user data. The sectors of the optical disc are verified by reading the user data on the unverified sectors of the optical disc and comparing the user data read from the unverified sectors of the optical disc with user data stored on a system buffer. The sectors of the optical disc are verified to determine whether any one of the unverified sectors having user data is defective. Also, the verifying of the unverified sectors establishes verified sectors having user data. The sectors of the optical disc that have been verified are tracked with a bitmap that is continually updated as the sectors are verified.
Owner:COREL CORP
Optical tape embossing drum and optical tape embossing drum shim
ActiveUS20100136151A1Recording verificationIntegrated optical head arrangementsMagnetic tapeEngineering
Owner:ORACLE INT CORP
Evaluation apparatus, evaluation method, and optical disk manufacturing method
InactiveUS20060285461A1Combination recordingModification of read/write signalsCompact Disc manufacturingSignal on
An evaluation apparatus for evaluating the recording quality of secondary data recorded on an optical disk recording medium on which primary data is recorded as combinations of pits and lands includes the following elements: a reading unit operable to read a signal on the basis of reflected light information of a laser beam of playback power irradiated onto the optical disk recording medium; a binarizing unit operable to slice the signal read by the reading unit at a predetermined level and output the result as a binary signal; and a jitter calculating unit operable to calculate a jitter of edge shift amounts on the basis of a standard deviation and an average of the edge shift amounts and information on a predetermined minimum shift amount determined as the minimum amount of shift that can be detected by a binary decision as an edge shift.
Owner:SONY CORP
Optical recording head including an optical resonant cavity
InactiveUS20060164960A1Improved medium heating elementHigh efficiency couplingRecording verificationIntegrated optical head arrangementsPhotodetectorHeat sensitive
An optical recording head including a media heating device to write and read data to a heat sensitive optical media disk. The media heating device includes an optical energy resonant cavity that produces a high intensity near-field optical spot of subwavelength dimension. Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate the cavity, and optical energy is coupled out of the cavity through an aperture that is placed proximate an antinode or post within the cavity. In reading data from the optical media, a photodetector is placed at the end of the waveguide. Optical energy emitted from the end of the waveguide is influenced by the reflectivity of the media data bit, and is interpreted as the data bit signal.
Owner:HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
Optical Disk Recording Apparatus and Optical Disk Recording Method
InactiveUS20080112289A1Low heat generationEasy loadingCombination recordingTelevision system detailsSignal processing circuitsEqualization
An optical disk apparatus is provided that has a signal processing circuit for equalizing a signal so as to achieve predetermined equalization, in which interference between codes is permitted, by means of an adaptive equalization circuit or the like, and for performing binarization by means of a maximum likelihood decoding circuit in which interference is performed as a rule, and thereby achieves stabilized signal reproduction in a narrow-band transmission. When evaluating the quality of the recorded signal through the use of the recording parameter learning and the reproduction system such as recorded signal verification, the optical disk recording apparatus is capable of highly precisely evaluating the quality of the recorded signal by fixing a circuit characteristic after suspending the optimization operation of the adaptive equalization circuit or the like for optimizing the characteristic by the reproduced signal. An optical disk recording method is also provided.
Owner:HITACHI CONSUMER ELECTRONICS CORP
Method of recording temporary defect list on write-once recording medium, method of reproducing the temporary defect list, recording and/or reproducing apparatus, and the write-once recording medium
InactiveUS20080094997A1Improve reliabilityImprove area utilizationRecording verificationRecord information storageComputer hardwareComputer science
Owner:SAMSUNG ELECTRONICS CO LTD
Method of recording temporary defect list on write-once recording medium, method of reproducing the temporary defect list, recording and/or reproducing apparatus, and the write-once recording medium
ActiveUS20050002294A1Improve reliabilityImprove area utilizationRecording verificationError preventionComputer hardwareRecording media
A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and / or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and apparatus for controlling the intensity of a laser beam used to record/reproduce data to/from an optical disc
Owner:SONY CORP
Method of recording temporary defect list on write-once recording medium, method of reproducing the temporary defect list, recording and/or reproducing apparatus, and the write-once recording medium
InactiveUS20080094962A1Improve reliabilityImprove area utilizationRecording verificationFilamentary/web record carriersComputer hardwareRecording media
A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and / or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.
Owner:SAMSUNG ELECTRONICS CO LTD
Optical read/write apparatus and read apparatus
In one embodiment, the optical read / write apparatus includes a plurality of optical pickups arranged to cross tracks of an optical storage medium and a control section. On finding the data that has been written by any of those optical pickups inaccurate or on detecting any defect at a location where data is going to be written by any of the optical pickups, the control section instructs another one of the optical pickups to write that data on a different track from a track on which the data should have been written.
Owner:PANASONIC CORP
Method of recording temporary defect list on write-once recording medium, method of reproducing the temporary defect list, recording and/or reproducing apparatus, and the write-once recording medium
InactiveUS20080094965A1Improve reliabilityImprove area utilizationRecording verificationElectronic circuit testingComputer hardwareRecording media
A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and / or reproducing the temporary defect list, and the write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording the temporary defect list, which is created while data is recorded on the write-once recording medium, in at least one cluster of the write-once recording medium, and verifying if a defect is generated in the at least one cluster. Then, the method includes re-recording data originally recorded in a defective cluster in another cluster, and recording pointer information, which indicates a location of the at least one cluster where the temporary defect list is recorded, on the write-once recording medium.
Owner:SAMSUNG ELECTRONICS CO LTD
Information storage medium, recording/reproducing apparatus and recording/reproducing method
InactiveUS20060026455A1Increase of data reproduction efficiencyData augmentationRecording verificationError detection/correctionComputer hardwareOriginal data
A write once information storage medium having original data, replacement data, updated data and management information recorded thereon and an apparatus for and a method of recording and managing the data and the management information. The management information includes a defect address, a replacement address and state information for distinguishing whether data at the replacement address replaces a defect encountered in the original data, a defect encountered in recording replacement data, or a defect encountered during updating of data by logical overwrite (LOW). Accordingly, by using state information to discriminate between replacement by LOW, replacement by defect during LOW and replacement by defect without LOW, data reproduction efficiency is increased in a system in which both replacement by LOW and replacement by defect are implemented.
Owner:SAMSUNG ELECTRONICS CO LTD
Optical read/write apparatus
ActiveUS20130088948A1Limited amountReducing modulated componentRecording verificationRecord information storagePhotovoltaic detectorsPhotodetector
An optical read / write apparatus as an embodiment of the present invention includes: a light-splitting element configured to split a light beam emitted from a light source into multiple light beams including a write beam and a read beam; an optical system configured to converge the write and read beams onto the same track on an optical storage medium; a photodetector including a light receiving element configured to detect the read beam reflected from the optical storage medium and output an electrical signal; and a divider configured to generate a read signal by dividing the signal detected by the light receiving element by a signal that represents a write modulated component and that is obtained by detecting a part of the light beam emitted from the light source.
Owner:PANASONIC CORP
Disc drive and method for determining write parameters
A method for controlling write parameters in a data-write process includes steps of: emitting a laser beam to be focused on a disc to write data onto the disc; determining whether a check-point predetermined for the disc is detected; at occurrence of the check-point is detected, pausing the data-write process and starting to detect a quality of the data; judging whether a block error rate of the data exceeds a predetermined rate; calculating a write speed based on the block error rate; and adjusting the write parameters based on the quality and the write speed.
Owner:HON HAI PRECISION IND CO LTD
Method of and apparatus for controlling writing power in an optical drive
InactiveUS6920097B2Improve featuresRecording verificationFilamentary/web record carriersLinearityOptical medium
An apparatus for and a method of performing running optimum power control (OPC) of a laser diode writing power in an optical drive. The apparatus and method obtain an optimum writing characteristic where the writing environment of the optical drive changes. A first normalized write signal having a first linear characteristic with respect to writing power is detected using predetermined condition values to set a first normalized write signal as a reference signal. A second normalized write signal having a second linear characteristic with respect to writing power is detected using the predetermined condition values, while writing data to a user area on the optical medium. The writing power of the laser diode is controlled based on determining whether the second normalized write signal is approximate to the first normalized write signal.
Owner:SAMSUNG ELECTRONICS CO LTD
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