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US20080212432 |
Aberration Correcting Apparatus, Optical Pickup, and Aberration Correcting Method
An optical pickup to be used for both DVD and CD is provided with an aberration correcting device using liquid crystal on an input side of an objective lens. A spherical aberration of a CD is... |
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US20080192600 |
Spherical Aberration Detector
An optical scanning device (1) for scanning at least one information layer (2) of at least one optical record carrier (3). The device includes a radiation source (7) for providing at least a first... |
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US20060002257 |
Information reproducing apparatus and control method therefor
An information reproducing apparatus is disclosed which recovers a video signal and an audio signal from input information, displays the video signal on a display unit, and reproduces the audio... |
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US20060140092 |
Information storage medium which stores defect management information, method of replacing defect management information, and apparatus which replaces defect management information
A plurality of defect management areas (DMA set groups 1 to N) are used in a ring form in such a manner that defect management information of the DMA replaces and is recorded in the next spare... |
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US20080151720 |
APPARATUS FOR TRANSFERRING DATA WITH RESPECT TO A WRITE-ONCE STORAGE MEDIUM, AND THE WRITE ONCE STORAGE MEDIUM
An apparatus for transferring data with respect to a write-once storage medium and the write-once storage medium, where the write-once storage medium includes a management area other than the data... |
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US20080101182 |
Disc device
The present invention provides a disc device capable of normally reproducing recorded information on a disc type recording medium while complementing the recorded information in a damaged portion... |
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US20080247288 |
Optical Disk Drive and Tracking Error Detection Method For an Optical Disk Drive
The present invention relates to a tracking error detection method for an optical storage system wherein an optical disk comprises a plurality of adjacent track portions with a radial track... |
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US20090086598 |
SERVO FRAME INTERVAL CORRECTION APPARATUS, STORAGE APPARATUS AND SERVO FRAME INTERVAL CORRECTION METHOD
One aspect of the embodiment utilizes a servo frame interval correction apparatus which includes a detection unit for detecting a first servo frame formed on said recording medium. The apparatus... |
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US20100046340 |
OPTICAL DRIVE DEVICE AND AMPLIFICATION RATE DETERMINING METHOD
An optical drive device generates a fist push-pull signal and a first sum signal based on a light receiving amount in two light receiving areas of which each width in a signal light tangent... |
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US20090316549 |
OPTICAL DISK DRIVE FOR SCANNING AN OPTICAL DISK WITH A SCANNING VELOCITY AND METHOD FOR SCANNING AN OPTICAL DISK WITH A SCANNING VELOCITY
An optical disk drive and a method for scanning an optical disk that includes a substantially circular track with a scanning velocity is provided. A servo control signal (SCS) is determined based... |
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US20090285067 |
BACK-UP METHOD FOR DEFECTIVE DATA
A back-up method for defective data includes: first writing a batch of data clusters on a user data area; reading the data clusters to check for defects; planning back-up positions on the back-up... |
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US20080068952 |
Track Jump Control Circuit
A track jump control circuit performing control for an optical pickup to ump from a present scanning track position to a target scanning track position on an optical disc including a header... |
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US20100027397 |
TRACKING BY CROSS CORRELATING CENTRAL APERTURES OF MULTIPLE BEAMS
The present invention provides a method and apparatus for robust tracking at narrow track-pitches on optical discs, enabling higher densities on Blu-ray Discs (5) as well as near-field discs.... |
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US20090109817 |
MEDIA DISC RELIABILITY
Damage to removable or non-removable media or to content on the media may prevent access to content on the media. A processor may recognize a defect in the media, for example, due to read errors.... |
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US20090028022 |
SINGLE SPOT CROSS-CORRELATION TRACKING
A tracking error (TE) signal is formed from a single spot on a photodetector 25 to improve the robustness in optical disc applications having a reduced track-pitch. Reduced track pitches are... |
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US20090010122 |
Aberration Detector and Optical Pickup With Same
The first polarizing hologram element (2) is divided into a first area (2a) allowing a first light beam to pass through and a second area (2b) and a third area (2c) which allow a second light beam... |
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US20120113782 |
STORAGE MEDIA DEFECT DETECTION
Detecting a defect on a storage device is disclosed. Detecting includes receiving a signal read from a storage device, sampling the signal to obtain a set of signal samples, wherein the sampling... |
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US20080247287 |
Disc Tilt Detecting Device
The invention relates to a device (201) for scanning an optical disc (202), such as a CD or DVD, the device (201) comprising a radial error detection unit (210) for determining a radial tracking... |
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US20090175147 |
Reducing written-in errors in servo patterns
A method for writing servo onto a disk of a hard disk drive. The method includes writing a plurality of spiral servo signals with a head. The spiral servo signals are used to generate position... |
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US20080239908 |
Method of detecting optical disk error information
A method of detecting optical disc error information on an optical disc, for applying in an optical disc drive, the method comprising: first, detecting whether the optical disc is blank, if not,... |
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US20060140093 |
Optical disk drive and method for allocating spare area on optical disk medium
On an optical disk medium, a spare area is allocated separately from a recording area. If the recording area includes a defective sector, alternate recording for the defective sector is performed... |
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US20080310273 |
CIRCUIT FOR GENERATING TRACKING ERROR SIGNAL
A circuit for generating a tracking error signal is provided. The circuit includes a digitized circuit, a short signal removing circuit and phase comparator. The digitized circuit receives first... |
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US20080056085 |
Information reproducing/recording apparatus
The present invention provides an information reproducing/recording apparatus capable of executing tracking servo normally in short time at the time of loading an information recording medium. At... |
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US20080165648 |
METHOD OF IMPROVING DEFECT COUNTERMEASURE OF APPARATUS FOR REPRODUCING OPTICAL INFORMATION STORAGE MEDIUM
A method of improving a defect countermeasure of an apparatus for reproducing an optical information storage medium. The method includes generating a defect detection signal corresponding to a... |
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US20080273434 |
Defect Management on File Level
A method of defect management is for use in recording information on a record carrier. A device for scanning a track on a record carrier reads blocks of information on logical addresses from... |
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US20090268574 |
OPTICAL DISC DRIVE AND METHOD OF CONTROLLING THE SAME
A method of controlling an optical disc drive to drive a multi-layer optical disc includes acquiring actual optimal aberration correction positions of a first layer and a second layer of the... |
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US20100039913 |
METHOD FOR PERFORMING SERVO DEFECT COMPENSATING OPERATION BY COMPENSATING SERVO-RELATED SIGNAL DERIVED FROM READING OPTICAL MEDIUM AND RELATED OPTICAL DISC DRIVE SYSTEM WITH DSP
A method for performing a servo defect compensating operation by compensating a servo-related signal in an optical disc drive and a related optical disc drive system with a DSP is provided. The... |
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US20080304383 |
PLAYBACK DEVICE AND MANAGEMENT INFORMATION ACQUIRING METHOD
A playback device includes a reading section that performs reading from a recording medium, and a control section that acquires the latest temporary management information recorded last on the... |
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US20080310272 |
Method and Recorder for Reducing Rejection of Record Carriers Due to Write Errors
When writing on a recordable medium the recorder can encounter write errors. When a write error occurrs the record carrier is discarded. By ignoring write errors in sections of the record carrier... |
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US20080074976 |
OPTICAL PICK-UP
According to an aspect of the invention, there is provided an optical pick-up for an optical disc drive, which is provided with an objective lens configured to converge a laser beam emitted from a... |
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US20080219120 |
Method and System to Improve Playability of Optical Record Medium
In summary, when an optical record medium is to be played, the optical drive first determines which type of optical record medium is inserted based on detection of a few signals and execution of a... |
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US20090207708 |
OPTICAL DISC DEVICE
An optical disc device capable of preventing a current larger than prescribed in specifications from flowing by measuring amounts of variation in drive signals of the actuator or the spindle... |
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US20090046552 |
MEDIUM CONTROL DEVICE, MEDIUM CONTROL METHOD, AND RECORDING MEDIUM
A medium control device for accepting a medium, reading from or writing to the medium, and monitoring for errors that occur while reading or writing provides a quality determiner for determining... |
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US20080279070 |
Optical Data Storage System and Method of Optical Recording and/or Reading
An optical data storage system for recording and/or reading, using a radiation beam, having a wavelength λ, focused onto a data storage layer of an optical data storage medium is described. The... |
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US20090141602 |
RECORDING MEDIUM STRUCTURE CAPABLE OF DISPLAYING DEFECT RATE
A recording medium structure capable of displaying a defect rate is provided. The recording medium has at least one use area with endurance blocks, and each endurance block has an endurance value.... |
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US20090262617 |
INFORMATION RECORDING DEVICE
An information recording device is provided, which is capable of performing physical reformatting at a high speed while avoiding unnecessary substitution processing after the physical... |
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US20100067339 |
OPTICAL DISC DEVICE
It is determined whether an error will occur due to presence of a defective area like a bubble and the storage area is managed according to the size of the defective area such that no data is... |
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US20080239906 |
Magnetic recording media, method for servowriting on same, and hard disk drive
Embodiments of the present invention provide a servo write medium, method and device for writing servo information by self servo write on the servo region formed from a flat section of the... |
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US20090028021 |
Radial To Focus Cross Talk Cancellation In Optical Storage Systems
A signal processing technique is proposed for compensating for radial to focus crosstalk in an optical storage system including an astigmatic lens (25) and four-quadrant photodetector (26) for... |
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US20080056084 |
Method and System for Improving the Ability of Player/Recorder Systems to Read a Disc During the Startup Procedure
In accordance with the invention, upon insertion of an optical disc into a player/recorder system, the system attempts to recognize the disc and read data from the disc. Any error causing failure... |
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US20080080346 |
DETECTION METHOD OF PERIPHERAL SURFACE DEFECT OF DISK AND DETECTION DEVICE THEREOF
A regularly reflected light made incident with an incident angle in a range of 45°±5° with respect to a surface of a chamfered portion of a disk is received by a light receiver The level reduction... |
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US20090161512 |
METHOD FOR ACCESSING DEFECT MANAGEMENT DATA
A method for accessing defect management data includes reading the required data block in an optical disc when an optical disc drive receives a command, storing data in a first buffer area,... |
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US20090034383 |
DISK-SHAPED RECORD MEDIUM AND PRODUCING METHOD FOR SAME, DISK RECORDING METHOD AND DEVICE, AND DISK PLAYBACK METHOD AND DEVICE
To record specific information to a disk-shaped record medium and reproduce the recorded specific information without any influence on the error correction capability. Copy protection information... |
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US20090252010 |
OPTICAL DISK DRIVE WITH DISK TYPE DETERMINATION AND METHOD OF DETERMINING A DISK TYPE OF AN OPTICAL DISK WITH AN OPTICAL DISK DRIVE
An optical disk drive and a method for determining a disk type are described. The optical disk drive may be arranged to receive a radial error signal while an incident beam is focused onto the... |
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US20080267029 |
Method of Generating a Position Error Signal, Method of Writing a Data Track, and Method and Apparatus for Testing a Head
A method of generating a position error signal for a desired radial position of a read/write head relative to a data track of a disk is disclosed. The track has a plurality of servo bursts... |
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US20080232213 |
Feedback Control Loop for Bit Detection in an N-Dimensional Data Block
On existing DVD and CD players a control loop is required for the adaptation and timing recovery. For Two-Dimensional Optical Storage such a control loop has drawbacks because PRML detection in... |
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US20090086599 |
OPTICAL DISC APPARATUS AND TRACKING CONTROL METHOD
According to one embodiment, an optical disc apparatus includes a pickup which receives reflected light from an optical disc, a tracking error detecting section which detects a tracking error from... |
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US20080212433 |
Optimum Tracking Error Compensation For Improved Optical Disk Playability
The present invention relates to a method for operating an optical drive system capable of reproducing/recording information from/to an optical carrier (30), wherein a position error and a speed... |
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US20080089201 |
Optical disc apparatus and data complementation method
A data complementation method including a defective-data confirmation step of confirming if there is address information of defective data, a complementation-data confirmation step of confirming... |
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US20100091627 |
OPTICAL DISK INSPECTION DEVICE AND INSPECTION METHOD
There is provided an optical disk device which quickly inspects the presence or absence of a defect in an optical disk in order to ensure that it can be played back on various types of optical... |