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| Number | Title | Issue Date |
| 7974163 | Optical disk device This optical disk device includes a read means which reads data from an optical disk upon which data is recorded at a variable bit rate for each sector. Moreover, this optical disk device includes a buffer memory which sequentially stores data which has been read by... | 07/05/2011 |
| 7839735 | Phase difference detection apparatus, phase difference detection method, reproduction apparatus and tracking controlling method Herein disclosed a phase difference detection apparatus for detecting a phase difference between a first signal and a second signal, which may include a waveform equalization section configured to input the first and second signals as a target waveform and an input ... | 11/23/2010 |
| 7782726 | Write splice for optical recording channels An enhanced write splice for optical recording channels is disclosed. Optical control circuitry locks to previously-written data and determines the estimated write splice location. A training sequence is written to the optical medium at a location based on the estim... | 08/24/2010 |
| 7706223 | Apparatus for and method of detecting a wobble signal in accordance with a time shift An apparatus for and a method of detecting a wobble signal in accordance with a time shift includes comparing a basic wobble signal with reference levels to detect pulses representing the time shift in an analog fashion, and digitally determining a code value for th... | 04/27/2010 |
| 7433281 | Address information recording apparatus and method, and address information reproducing apparatus and method A method for recording address information to an optical disc (5) by forming a wobbled groove is provided. The method includes steps S1 to S3. In step S1, there is generated address information composed of a sync signal, address data and ... | 10/07/2008 |
| 7417926 | Detector for detecting information carried by a signal having a sawtooth-like shape A detector for detecting information carried by a wobble signal having a sawtooth-like shape with a base frequency of fwob. The detector includes a first band-pass filter having a center frequency close to 2*fwob for filtering the wobble signal... | 08/26/2008 |
| 7406009 | Information recording/reproducing apparatus and information reproducing method An information recording/reproducing apparatus and information reproducing method records information data, regardless of an external disturbance. According to a demodulated timing pulse, a synchronization signal and address data representative of an address is demo... | 07/29/2008 |
| 7388818 | Link writing method for a recordable or rewritable compact disk and drive for using the method A link writing method for a recordable or rewritable compact disk includes recording a writing interruption address and enabling a succeeding writing process after the writing interruption. Enabling a succeeding writing process includes searching the linking area an... | 06/17/2008 |
| 7379401 | Device and method for connecting interrupted recording This invention provides an optical storage device for recording a plurality of data onto an optical storage medium. If recording interrupted, the optical storage device generates a data-interrupted address, and re-connects the interrupted data with a data re-connect... | 05/27/2008 |
| RE40240 | Information recording/reproducing device using optical disk and method therefor and information recording system and information recording method The sector synchronism of a timing generation section for generating data recording/reproducing timing is corrected at the address-mark detection timing of an address-mark detection section. Moreover, even if only one piece of address information having no error is ... | 04/15/2008 |
| 7349297 | Method and apparatus for acquiring an index mark A method and apparatus for reading an index mark pattern. The pattern may be formed on an optical disc medium. The optical disc medium may include a set of data arranged in a data field, and an index mark pattern for identifying a relative location of the data field... | 03/25/2008 |
| 7349309 | Disk recording medium having ID recorded over a circle of a burst cutting area Disclosed is a disk-like recording medium, a disk recording apparatus and a disk recording method, and a disk playback apparatus and a disk playback method. Disk ID is recorded over a circle of a burst cutting area on an optical disk. The circle is divided into n bl... | 03/25/2008 |
| 7343544 | Optical disk playback apparatus and data playback method therefor An optical disk playback apparatus for playing back or reproducing main data and its associated sub-code which are read from an optical recording medium comprises an interleave RAM for storing the main data. The optical disk playback apparatus performs a predefined ... | 03/11/2008 |
| 7342866 | Optical disc and its information recording method and apparatus Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical disc, and a recording start head position of the Data segment to be rec... | 03/11/2008 |
| 7333409 | Link writing method for a recordable or rewritable compact disk and drive for using the method A link writing method for a recordable or rewritable compact disk includes recording a writing interruption address and enabling a succeeding writing process after the writing interruption. Enabling a succeeding writing process includes searching the linking area an... | 02/19/2008 |
| 7322003 | Information storage device A control unit transfers user data and an ECC that are read from a magnetic disk and stored in an FIFO to a data buffer. An erasure position movement control unit shifts an erasure start position from a predetermined initial value at predetermined intervals of erasu... | 01/22/2008 |
| 7317679 | Sync frame structure, information storage medium, information recording method, information reproduction method, information reproduction apparatus To improve the sync code detection reliability while simplifying the sync code position detection process, when a first pattern as a combination of three successive sync codes is compared with a second pattern in which the allocation of sync codes is shifted by one ... | 01/08/2008 |
| 7317674 | Optical pick-up units and laser drivers with increased functionality Optical pick-up units and laser drivers are disclosed, which can be used in various types of information recording/reproducing apparatuses, such as, but not limited to, DVD and CD drives, DVD camcorders, and DVD video recorders. A laser driver integrated circuit (LD... | 01/08/2008 |
| 7286452 | Apparatus and method for detecting synchronization of address in pre-groove for optical storage device An apparatus and method detecting synchronization of address in pre-groove (ADIP), allowing an optical storage device to write data to an accurate location of a disc includes a bit synchronization detecting unit and a word synchronization detecting unit. The bit syn... | 10/23/2007 |
| 7277368 | Playback method, playback control circuit and playback apparatus for a recording medium Stable playback performance is assured and data loss due to out-of-step synchronization is reduced even when playback signal quality deteriorates due to such cause as a recording medium defect. The playback method applies to a recording medium to which data is recor... | 10/02/2007 |
| 7272093 | Apparatus for controlling an optical disk drive by calculating a target frequency of a DPLL signal A control circuit for an optical disk drive includes a frequency detector, a phase detector, a low pass filter, a voltage-controlled oscillator (VCO), and a controller. The frequency detector and the phase detector both receive an eight-to-fourteen modulation (EFM) ... | 09/18/2007 |
| 7248777 | Methods and apparatus to detect content skipping by a consumer of a recorded program Methods and apparatus to detect content skipping by a consumer of a recorded program are disclosed. In a disclosed method, a plurality of recording times of sections of a recorded program are stored in association with playback times of the recorded program. Playbac... | 07/24/2007 |
| 7248557 | Robust header configuration and method for reading sector identifiers contained therein For the purpose of providing sector-address information on optical disks, a robust header is realized by utilizing a very simple encoding method that allows asynchronous reading. In order to provide robustness and reliability, the header uses a biphase data format t... | 07/24/2007 |
| 7249384 | Copy-resistant read-only digital optical disc and adaptable player A copy-resistant read-only digital optical disc having encrypted digital data. The copy-resistant read-only digital optical disc includes a digital work, a variable user data format encoding said digital work after encryption with a variable software algorithm, an i... | 07/24/2007 |
| 7236435 | Address information recording device and recording method and reproducing device and reproducing method A method for recording address information to an optical disc (5) by forming a wobbled groove is provided. The method includes steps S1 to S3. In step S1, there is generated address information composed of a sync signal, address data and ... | 06/26/2007 |
| 7236437 | Shock detector for optical disc recorders and shock-proof recording method using shock signal A shock detector for an optical disc recorder and method for controlling the recording using a shock signal. The shock detector includes a first detecting unit for detecting the amplitude of a first kind of reference signal passing through a band-pass filter and out... | 06/26/2007 |
| 7224650 | Recording medium, its controller and controlling method A recording medium which has a high recording density and realizes a short search time is provided. The recording medium according to the present invention is a recording medium which comprises addresses indicative of positions on the recording medium and which is f... | 05/29/2007 |
| 7221629 | Controller for an optical disk drive, semiconductor integrated circuit and optical disk drive A controller for an optical disk drive includes a modulator configured to modulate a record data to be recorded on a optical disk based on a record clock that is a reference clock in recording, and to generate a modulation data and an address information of the modu... | 05/22/2007 |
| 7215612 | Disk recording apparatus and disk recording method The disk recording apparatus and method are arranged to specify a recording address and a recording position on an optical disk with a wobble PM (phase modulation) format through the use of a wobble reproduced signal and a track reproduced signal. The recording appa... | 05/08/2007 |
| 7203014 | Preformat method for magnetic recording medium, magnetic recording medium, and magnetic recording and reproducing apparatus The magnetic recording and reproducing apparatus reads a transfer clock synchronized with servo information and records a write-once clock pattern in a state where 0 is set as a delay time of the delay device 13 and 1 is set as the dividing ratio of the frequ... | 04/10/2007 |
| 7196984 | Optical disk medium and optical disk recording and reproducing apparatus A recording data string is composed of a plurality of synchronous frames each of which has synchronous data and coding data. Data items in the coding data contributed to creation of the same column of the error correction code are arranged at regular intervals of E ... | 03/27/2007 |
| 7193941 | Optical disc drive with clock synchronization and rotational speed detection An optical disc drive includes: a motor for rotating an optical disc thereon; a photoelectric transducer for converting a light beam, reflected from or transmitted through the disc, into an electric signal; a clock sync signal reader for extracting and outputting a ... | 03/20/2007 |
| 7170249 | Electrical phase compensation in BEMF spindle motor control A method and apparatus for compensating for the asymmetrical phases of a spindle motor in a disc drive are provided. With the apparatus and method, compensation values are learned by sampling speed data during a period of operation of the disc drive where the speed ... | 01/30/2007 |
| 7171156 | Method and apparatus for transmitting audio and non-audio information with error correction A method and an apparatus for providing digital quality transmission of audio and non-audio information using low cost components and arrangement. The present invention provides for the transmission of the audio and non-audio transmission by first converting the dat... | 01/30/2007 |
| 7170841 | Information recording medium, recording apparatus, reproduction apparatus, recording method, and reproduction method An information recording medium is provided, which comprises a plurality of recording layers and a first disc information area for storing parameters relating to access to the plurality of recording layers and formats relating to the plurality of recording layer. Th... | 01/30/2007 |
| 7170837 | Optical disk device having means for generating a tracking offset signal according to laser diode current or temperature An optical disk device capable of data recording. A tracking error signal is generated from return light from an optical disk, and the tracking error signal to which a tracking offset signal is further added is supplied to a tracking servo circuit. A tracking offset... | 01/30/2007 |
| 7167427 | Data recorder A data recorder for recording data that prevents buffer overrun errors emits a laser beam against a recording medium to record data. The data has a level that determines the power of the laser beam. When there is a possibility of a buffer overrun, data recording is ... | 01/23/2007 |
| 7164373 | Data modulating method and apparatus, data demodulating method and apparatus, and code arranging method In a data demodulating method and apparatus, and a code arranging method, a multiplexer multiplexes an input data stream divided by a predetermined length into a plurality of types of pseudo random data streams using multiplexed information of predetermined bits by ... | 01/16/2007 |
| 7161878 | Recording apparatus for an optical disk The present invention relates to a recording apparatus for improving operability of a DVD camcorder that performs recording in a video format. When an instruction for starting recording is given at a time T11 and then an instruction for stopping the recording... | 01/09/2007 |
| 7158457 | Optical disk device for recording at optimum recording power An optical disk device for estimating optimum recording power for high speed recording at an outer part of an optical disk, with high accuracy, even when an OPC for high speed recording at the outer part cannot be performed. The optical disk device includes a first ... | 01/02/2007 |
