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| Number | Title | Issue Date |
| 8130607 | Method and apparatus for detecting burst cutting area on optical disc An apparatus for detecting burst cutting areas on optical discs includes an optical pickup head, a front-end processing unit, a sync pattern detector, a channel clock recovery device, and a data demodulator. The front-end processing unit generates a BCA signal in re... | 03/06/2012 |
| 8130608 | Coupled ring oscillator and method for initializing the same In a coupled ring oscillator including q ring oscillators each including p inverter circuits connected together to form a ring shape, and a phase coupling ring including (p×q) phase coupling circuits each of which is configured to couple an output of one of the p i... | 03/06/2012 |
| 7978573 | Detecting sync patterns for optical media A sync finder includes a pulse jitter detect module to select N-bit segments of an M-bit sync pattern at predetermined positions and to compare the N-bit segments to expected N-bit segments. A pulse verifying module generates a first signal in response to the expect... | 07/12/2011 |
| 7848194 | Device and method for writing data A data writing device for preventing a phase-change optical disc from deteriorating due to repeated writing and for preventing the rewritable number of times of the disc from decreasing. The device writes data including synchronization frames to the disc. Each synch... | 12/07/2010 |
| 7656760 | Playback apparatus and sync signal detecting method A playback apparatus plays back information from a recording medium having a data structure including sync signals added in units of data items each having a predetermined size. The information is recorded in runlength limited codes, and the signals correspond to co... | 02/02/2010 |
| 7474597 | Writing method for optical disc, processing method for information, optical disc apparatus, and information processing apparatus A writing method for an optical disc to optimize a writing speed, wherein a spiral track on the optical disc is divided into a plurality of zones, and different CLV writing speeds are used for performing a ZCLV writing to the zones respectively. The writing method c... | 01/06/2009 |
| 7436747 | Detector and method for detecting synchronization signals in disc system A detector and a method for detecting synchronization signals in a disc system are disclosed. The method includes sampling a disc signal with a sampling clock to generate a plurality of sampled data, comparing the plurality of sampled data with a predetermined synch... | 10/14/2008 |
| 7430158 | Music player with adjustable pitch controller A media player having variable pitch is disclosed. The player incorporates a memory buffer that is responsive to a user-designated pitch adjustment. The result is that a user can manually control and adjust the pitch of prerecorded CDs and MP3s or other digital medi... | 09/30/2008 |
| 7366064 | Disk reproducing apparatus A disk reproducing apparatus for reproducing a digital audio signal recorded on a DVD or CD has a PLL portion for outputting a synchronizing signal in synchronism with the digital audio signal. When the CD is reproduced at double speed or higher, the PLL portion inc... | 04/29/2008 |
| 7362670 | Optical disc drive An optical disc drive that can carry out recording data to an optical disc such as a format procedure of the optical disc in a relatively short time is provided. An optical disc drive 1 has a rotation driving mechanism for rotating a loaded optical disc 2 | 04/22/2008 |
| 7362671 | Optical disc recording and/or playing apparatus and method A data recording and/or playing method for recording or playing data to or from an optical disc having a first recording area, where a frame sync signal and the data are recorded, and a second recording area, where a predetermined pattern is preformed, and having ad... | 04/22/2008 |
| 7355939 | System and method for switching control modes of spindle motor A system and method of switching the control modes of spindle motor are described. The switch system comprises a first control module, a second control module and a switch controller. The first control module electrically coupled to the spindle motor and the OPU con... | 04/08/2008 |
| 7355947 | Optical disk device and optical disk In an optical disk of HD-DVD, data is recorded in both grooves and lands. A groove track includes its own data region called a groove (G) track address system formed therein and a land track includes its own data region called a land (L) track address system formed ... | 04/08/2008 |
| 7355937 | Method and device for recording information in units A method and device for recording information signals on a partly recorded writable record carrier (11), e.g., an optical disc. An information signal represents at least one information unit. The record carrier has a recording track which includes preformed t... | 04/08/2008 |
| 7349302 | Optical disk recording apparatus and optical disk recording method For protecting the recording from shifting in the position, by conducting sync detection, correctly, from land pre pits, in an optical type recording disc, even if sync pattern errors, in more detail, synchronization is conducted on a recording circuit, with certain... | 03/25/2008 |
| 7349305 | Wobble signal reproducing device and method A wobble signal reproducing device and method. The wobble signal reproducing device may include a computation unit for outputting a push-pull signal by use of a signal picked up by wobbling an optical disc; a wobble band pass filter (BPF) unit for applying band pass... | 03/25/2008 |
| 7339405 | Clock rate adjustment apparatus and method for adjusting clock rate A clock rate adjustment apparatus and a method for adjusting a clock rate of a clock for an optical storage system are provided. The clock rate adjustment apparatus comprises an indication provider, a throughput rate detector, and a clock generator. The method perfo... | 03/04/2008 |
| 7339862 | Optical disc driving system and method for determining rotation speed of optical disc A novel optical disc driving system and method for determining the rotation speed of an optical disc are provided, which allow to determine the highest rotation speed optimal for reading out audio and video data in the optical disc in accordance with the environment... | 03/04/2008 |
| 7330413 | Smart burn method for optical drive The present invention is smart burn method for optical drives. When the laser pick-up head bears great oscillations along the vertical and horizontal directions, the laser light cannot focus on the track accurately that causes the failure of writing. The present inv... | 02/12/2008 |
| 7319648 | Apparatus and method for reproducing record for optical recording medium The method for reproducing records for the optical recording medium detects and compensates for detrack, tilt and defocus, having advantages in that: (1) the magnitude and the direction of detrack, tilt and defocus can be detected from a difference signal (for examp... | 01/15/2008 |
| 7310296 | Method for decoding address in pre-groove data of an optical disc drive A method for optical drive decoding of address in pre-groove (ADIP) data is provided to decode an input wobble signal to an ADIP unit signal. The method includes generating a wobble carrier frequency signal having the same phase with the wobble signal, multiplying t... | 12/18/2007 |
| 7304923 | Disk drive and detection method using pre-pit detection and push-pull signal generation A push pull signal is detected from a disk-shaped storage medium on which wobbling grooves are formed as recording tracks and address information is recorded by forming pre-pits on lands between adjacent grooves. The detected push-pull signal is compared with a refe... | 12/04/2007 |
| 7292513 | Method of correcting clock of compact disk and circuit thereof A circuit for correcting a clock of a compact signal and a method therefor. The method comprises: receiving a data signal and a clock signal; and generating a sync pattern signal by using the clock signal to check the data signal. Then, a detection window signal acc... | 11/06/2007 |
| 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 |
| 7280742 | Method for recording audio data on a rewritable recording medium and for adjusting data grouping criterion The present invention relates to a method of writing audio data to a rewritable recording medium as grouping the written audio data into each Audio Object Unit (AOBU). This method changes AOBU grouping criterion such as time or size if a bit rate of input audio data... | 10/09/2007 |
| 7280451 | Wobble signal detecting circuit for optical disk device and wobble signal detecting method A wobble signal detecting circuit for an optical disk reproducing device configured to reproduce an optical disk which has a track including a snaking portion at a specific period, including an optical detecting unit which detects a signal written on the track, firs... | 10/09/2007 |
| 7274635 | Method and apparatus for recording address information on disc medium In step S1, the address generator generates address information composed of a sync signal which is recorded on an optical disc, address data and an error correction code for the address data, pre-encodes and supplies it to a modulator. At the same time, a car... | 09/25/2007 |
| 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 |
| 7266062 | Noise removal using 180-degree or 360-degree phase shifting circuit A noise removal circuit of the present invention comprises a 180-degree odd multiple shifting section for outputting a 180-degree shifted signal that is phase-shifted from an input signal by an odd multiple of 180 degrees and difference output section for outputting... | 09/04/2007 |
| 7251192 | Register read for volatile memory Data not stored in the DRAM array of a SDRAM module is read from the SDRAM module in a synchronous data transfer. The data transfer, referred to as register read command/operation, resembles a read command/operation directed to data stored in the DRAM array in timin... | 07/31/2007 |
| 7251098 | Disk drive adjusting write clock frequency to compensate for eccentricity in disk rotation A disk drive is disclosed that estimates a sinusoidal error in a wedge time period due to eccentricity in the disk rotating to generate eccentricity compensation values. During a write operation a head is positioned over a target data sector within a target track, a... | 07/31/2007 |
| 7245579 | High-definition optical disk and high-definition optical disk drive A high-definition optical disk and a high-definition optical disk drive, which record data on lands and grooves. Wobbles are formed in grooves and lands of an optical disk, and address information is embedded in the wobbles. The wobbles are formed so as to become in... | 07/17/2007 |
| 7245572 | Apparatus for PID address protection and method thereof A protecting device installed in an optical storage system for protecting a plurality of physical identification data synchronous signals includes a synchronous pattern detecting device, a data synchronous signal insertion device for adding the amount of data synchr... | 07/17/2007 |
| 7242649 | Synchronization circuit for optical disc apparatus and synchronization method for optical disc apparatus A synchronization circuit for an optical disc apparatus, which performs synchronization operation based on a playback signal of an optical disc, the circuit comprises a playback signal recovery timing detection circuit that detects timing corresponding to the recove... | 07/10/2007 |
| 7231731 | Information record medium having two phase pit areas of mutually different depths and groove track area On an information record medium (1), information is optically recorded and reproduced while a servo control is performed with respect to the information record medium by a push-pull method. The information record medium is provided with: a record/reproduction... | 06/19/2007 |
| 7230876 | Register read for volatile memory Data not stored in the DRAM array of a SDRAM module is read from the SDRAM module in a synchronous data transfer. The data transfer, referred to as register read command/operation, resembles a read command/operation directed to data stored in the DRAM array in timin... | 06/12/2007 |
| 7218858 | System and method for use of a variable optical attenuator in an optical network Described herein are one or more embodiments of a system and method for managing power in an optical network using a variable optical attenuator (VOA). In one embodiment, the attenuation of the VOA is controlled in a feedback loop in accordance with a plural zone me... | 05/15/2007 |
| 7200081 | Write strategy circuit, write strategy method, and optical disk apparatus A write strategy circuit and a write strategy method for capturing data are disclosed. A strategy clock generator generates a strategy clock signal based on a channel clock signal. A phase controller produces a capturing channel clock signal by controlling a phase o... | 04/03/2007 |
| 7200093 | Method and related apparatus for decoding information carried by wobble signals An apparatus for generating a wobble clock includes an operation circuit for receiving a wobble signal and counting cycles of an oscillating signal during a cycle of the wobble signal to derive a cycle value and for comparing the cycle value with a preset cycle valu... | 04/03/2007 |
| 7193936 | Wobble information detection method and wobble information detection apparatus for optical recording medium A method and apparatus for detecting information recorded as a phase-modulated wobble along a track of an optical disk, whereby a reference phase section is recorded with wobble having a predetermined reference phase and whereby respective polarities of phase integr... | 03/20/2007 |
