Matches 1 - 50 out of 114 1 2 3 >


Match Document Document Title
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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....
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...

Matches 1 - 50 out of 114 1 2 3 >