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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8189439 | Data recording method and apparatus for re-verifying correctness of recorded data on optical storage medium An exemplary data recording method of an optical storage medium includes following steps: during a current recording operation for recording first data onto the optical storage medium, detecting if a fatal recording error occurs; and when the fatal recording error i... | 05/29/2012 |
| 8184512 | Optical disk drive with embedded test medium Embodiments provide an optical disk drive that includes an embedded test medium for testing the optical performance of an optical head in the optical disk drive. ... | 05/22/2012 |
| 8116182 | Information processing apparatus and fault symptom determination method According to one embodiment, an information processing apparatus includes an optical disc drive, a measuring module in the optical disc drive, and a measurement value reception module. The measuring module is configured to measure a value related to an operation of ... | 02/14/2012 |
| 8050160 | Characterizing frequency response of a multirate system Frequency response is characterized for mechanical components of a multirate system operating in a closed-loop environment. A disturbance is injected at the frequency of interest and at each of the alias frequencies thereof as an input into the multirate system, and... | 11/01/2011 |
| 8040772 | Method and apparatus for inspecting a pattern shape An apparatus for inspecting a pattern shape of a magnetic record medium or its stamper includes: a moving mechanism, on which an object to be inspected where a pattern is formed is placed and which moves the object to be inspected in a radial direction while rotatin... | 10/18/2011 |
| 8040773 | 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 comprising unused information, for instance sections of the lead-in or... | 10/18/2011 |
| 8023376 | Fast disc recognition by elimination of calibrations A method and a device for fast disc recognition for use in read/write performances when an optical disc is connected to an optical drive, including the provision of a set S of parameters for safe data transfer between the drive and the disc, the direct calibration d... | 09/20/2011 |
| 8000195 | Signal processing system A signal processing system applicable to an electronic system having a storage unit, an indicator light, and a driving circuit includes a first signal processing unit, a second signal processing unit, and a signal computing unit. The indicator light will light up, i... | 08/16/2011 |
| 7768886 | Method for detecting a utilization status of an optical disc and apparatus thereof A method for detecting a utilization status of an optical disc is disclosed. The method includes: accessing the optical disc to generate a radio frequency signal; generating an estimated blank signal according to the radio frequency signal; generating a first refere... | 08/03/2010 |
| 7652962 | Using PRML read channel ADC for blank/defect and ripple detection An apparatus including a photo detector circuit, a first circuit, a second circuit and a third circuit. The photo detector circuit may be configured to generate an RF signal in response to a laser spot on a surface of an optical disc. The first circuit may be config... | 01/26/2010 |
| 7596067 | Method of laser spot location and adjustment thereof This invention relates to a method of determining the location of a plurality of laser spots, comprising: determining a first distance of a first laser spot; determining a second distance of the first laser spot; determining a first distance of a second laser spot; ... | 09/29/2009 |
| 7558173 | Disk device and control method therefore A disk device which performs recording and reproduction of an audio-visual signal for an optical disk, includes: a determination unit for determining whether an optical disk loaded into the disk device is an unrecorded disk; a reading unit for reading arbitrary ASCI... | 07/07/2009 |
| 7551533 | Optical disk, optical disk drive and method of playing back an optical disk An optical disk that has a BCA, from which data can be reproduced even if the BCA has defects. The data format of the BCA comprises a plurality of sub-data units and coupling codes, each coupling two adjacent sub-data units. The sub-data units contain the same data.... | 06/23/2009 |
| 7512044 | System and method for enabling efficient small writes to WORM storage According to the present invention, there is provided a method of providing a WORM storage system, the method including a sector-append capability. The method includes receiving data to be written to a WORM storage system. In addition, the method includes identifyin... | 03/31/2009 |
| 7453777 | Method and device for optical form measurement and/or estimation A method for optical shape recording and/or evaluation of optically smooth, glossy or optically rough surfaces wherein a photometric stereo method and a deflectometric method are combined using a scattering body so that the positions on the scattering body surface a... | 11/18/2008 |
| 7440371 | Unbalanced disc detection and reading speed control in disc reading apparatus An open-loop test procedure under high rotating speed is entered to compute a first TE crossing track number. The first TE crossing track number greater than a first threshold indicates an unbalanced disc and results in a low-speed reading procedure. On the other ha... | 10/21/2008 |
| 7439729 | Integrated systems testing A hard disk drive system comprises N hard disk drive means for performing hard disk drive functions and is connected in a daisy chain, wherein N is greater than one. The system includes integrated system test (IST) means for testing and that is integrated with a fir... | 10/21/2008 |
| 7414938 | Recording medium, recording apparatus, reproduction apparatus, recording method and reproduction method The present invention allows the usability of a write-once recording medium to be enhanced. The write-once recording medium is provided with an ordinary recording/reproduction area, an alternate area, a first alternate-address management information area (DMA) and a... | 08/19/2008 |
| 7411872 | Servo-tracking and three-dimensional alignment in page-based data optical storage A system for page-based optical data storage includes a sensor array positioned to track a data page when the data page is optically read from or recorded to a storage medium. A servo mechanism is used to position the sensor array. A plurality of alignment points ar... | 08/12/2008 |
| 7409599 | Method of verifying defect management area information of optical disc upon initialization without certification and test apparatus for performing the same A method of verifying defect management area (DMA) information of an optical disc upon initialization without certification, and a test apparatus for performing the same. The method includes generating as test information, defect management information, which is gen... | 08/05/2008 |
| 7355932 | Optical disk device for detecting thickness errors of the transparent substrate The invention detects the thickness error of the transparent substrate using a general focus error signal detection system employing the fact that the reflecting light from the optical disk causes distortions in diffraction image at the detection plane or unsymmetri... | 04/08/2008 |
| 7355944 | Authenticatable media and method of authenticating One method for playing a disk, comprises illuminating a first portion of the optical article with a first laser to obtain a first optical signal, wherein the first laser has a first wavelength, illuminating a second portion with a second laser to obtain a second opt... | 04/08/2008 |
| 7349299 | Method of optical disc discrimination A method for discriminating between different types of optical discs is intended to apply to an optical storage device with a pick-up head having three beams. A main beam push-pull signal and a sub-beam push-pull signal, both acquired by means of the photo-detector ... | 03/25/2008 |
| 7339880 | Method of recording information to and reproducing information from an optical information storage medium A method of recoding information on a reproduction-only optical information storage medium, including: forming a plurality of areas and at least one transition area on the reproduction-only optical information storage medium. Each transition area is located between ... | 03/04/2008 |
| 7332940 | Voltage hold circuit and clock synchronization circuit A voltage hold circuit which holds an input signal voltage includes a voltage comparator unit configured to output a result of comparison between a voltage of an externally inputted control signal and a voltage of an outputted analog hold signal, a digital value hol... | 02/19/2008 |
| 7327656 | Tilt correction method detecting tilt with same linear velocity as upon actually recording/reproducing at each radial position Prior to recording/reproducing information to/from an optical disk rotationally driven by a spindle motor, an optical pickup is moved to a plurality of measuring positions set beforehand in a radial direction of the optical disk. A relative tilt between the optical ... | 02/05/2008 |
| 7319653 | Methods for recording data to optical media A method for recording data to optical media is provided. A selection of files to record from a source to a destination optical media is received, and an enumeration of the data files to record to the destination optical media is generated. The enumeration of data f... | 01/15/2008 |
| 7289411 | Optical disc apparatus The present invention provides an optical disc apparatus capable of rotating an optical disc with high speed while enabling reduced current consumption. The optical disc apparatus comprises a spindle motor for rotating the optical disc and a thread motor for driving... | 10/30/2007 |
| 7288935 | System, method, and apparatus for dynamic electrical testing of workpieces by multiplexing test sites with shared electronics A dynamic electrical tester (DET) for testing head gimbal assemblies (HGA) is disclosed. The DET simulates disk drive operation while significantly reducing tester capital investment. Multiple HGAs are tested simultaneously using modular spin stands with shared elec... | 10/30/2007 |
| 7286458 | Quality-testing apparatus and method A quality-testing apparatus is disclosed for an optical disk of the type that stores optically readable information in the form of a spiral or annular pattern defining a plurality of essentially concentric tracks. The apparatus has a laser light source and a drive m... | 10/23/2007 |
| 7269106 | Power efficient scheduling for disc accesses A device for scanning a record carrier has a head for scanning a track for reading and/or writing information. A disc scheduler controls receiving requests for accessing the record carrier, the requests including streaming requests regarding real time information an... | 09/11/2007 |
| 7269767 | Magnetic disk apparatus, preventive maintenance detection method and program therefor The present invention has been made to obtain a magnetic disk apparatus and the like capable of using a patrol region in the magnetic disk to detect a location in need of maintenance in hardware equipment around the magnetic disk in a separate manner from the disk i... | 09/11/2007 |
| 7260040 | Method and apparatus to display status of an optical recording and/or reproducing apparatus A method and apparatus to display a status of an optical recording and/or reproducing apparatus. The method includes, determining a type of an optical disc loaded into a tray; transmitting a predetermined signal based on the determination result to a laser emitting ... | 08/21/2007 |
| 7260050 | Apparatus for detecting physical marks from wobble signal and method thereof An apparatus for detecting physical marks from a wobble signal includes a matching value operation unit, a threshold value generator and a physical mark indicator. A wobble signal is converted into a matched signal by the matching value operation unit according to t... | 08/21/2007 |
| 7251205 | Method and apparatus for establishing manufacturer-specific test writing parameters for writing of writable optical storage media A method and an apparatus establish manufacturer-specific test writing parameters for writing of a writable optical storage media in accordance with the media manufacturers, which are experimentally determined and stored into a certain storing unit; determine an opt... | 07/31/2007 |
| 7245576 | Optical recording medium and optical recording-reproducing method An optical recording medium includes an optical recording layer, a separating layer formed on a reproducing light incident side of the optical recording layer, and a phase-change reproducing layer formed on the reproducing light incident side of the separating layer... | 07/17/2007 |
| 7230890 | Apparatus and method for stabilizing operation of disc driver in section for setting mode conversion An apparatus which stabilizes an operation of a disc driver in a mode conversion setting section includes a pickup which reads information from a disc that is inserted into the disc driver, a filter which performs a low-pass filtering of a servo error signal that is... | 06/12/2007 |
| 7230891 | Optical disk device recording data on a recordable or rewritable optical disk by setting a recording velocity and a recording power for each of zones on an optical disk An optical disk device record data on a recordable or rewritable optical disk. After a pause and a restart in the constant angular velocity (CAV) method occurs predetermined times due to a cause of a recording error such as a buffer underrun, the data-recording by t... | 06/12/2007 |
| 7230895 | Information recording apparatus and information recording method A laser beam from a pickup is focused on an information recording medium, such as a DVD-R/RW, to record information. When the power of the laser beam is calibrated, the laser beam emitted from the pickup is received by a light receiving unit such as an FMD. The leve... | 06/12/2007 |
| 7219190 | Automatic media readying system and method One aspect of the invention is a method for automatically readying a medium. The method comprises monitoring a state of a storage medium using readying logic and determining a physical media type for the storage medium using the readying logic. The method also compr... | 05/15/2007 |
