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| Number | Title | Issue Date |
| 8077568 | Method and system for synchronizing information specific to a location on a surface with an external source An apparatus including sensors that aid in the location of a stylus within the groove of a rotating record. The location of the stylus corresponds to a portion of an audio waveform present at a unique location within the groove. Using the correspondence between the ... | 12/13/2011 |
| 7542390 | Method for sampling optical disc data and apparatus thereof Technology for sampling optical disc data are described. A first sync tag signal and a data signal are provided, and the previous first sync tag signal is saved as a second sync tag signal. Then, the value of the first sync tag signal and the second sync tag signal ... | 06/02/2009 |
| 7460452 | System and method for restoring an optical disc signal Provided are a restoration system and method for an optical disc, by which a radio frequency signal optically picked up from an optical disc is restored. The restoration system includes a slice, a phase locked loop, a latch circuit, a 3T correction circuit, and a de... | 12/02/2008 |
| 7433289 | Frequency detection method for optical disc bit data reproduction apparatus The present invention relates to a frequency detection method for an optical disc bit data reproduction apparatus. The frequency detection method uses the optical disc bit data reproduction apparatus including an Analog to Digital Converter (ADC), an interpolator, a... | 10/07/2008 |
| 7426167 | Information storage medium, recording method, reproducing method, and reproducing apparatus An information layer 0 comprises a system lead-in area, data lead-in area, data area, and middle area, an information layer 1 comprises a system lead-out area, data lead-out area, data area, and middle area, an end position of the data area of layer | 09/16/2008 |
| 7414933 | Reproducing apparatus having an improved PLL circuit and related computer program In a PLL circuit, a phase error of a reproduced signal is extracted in either a way based on a zero-cross timing or a way based on a self-running timing. A decision is made as to whether the reproduced signal is in a continuous-wave interval where an inversion perio... | 08/19/2008 |
| 7372797 | Data reproduction device A data reproduction device for sampling a signal reproduced from a recording medium based on a synchronization clock signal synchronized with the reproduced signal includes: an analog-to-digital conversion part converting the reproduced signal into a first digital s... | 05/13/2008 |
| 7369625 | Apparatus and method for slicing RF signal and compensating for the slice level of RF signal in disk drive An apparatus and method for slicing an RF signal and compensating for the slice level of an RF signal reproduced from a disk, which minimizes a block error rate by optimizing the slice level of the RF signal according to variations in symmetry of the RF signal when ... | 05/06/2008 |
| 7369476 | Device for reading from or writing to optical recording media having a control unit for a data slicer The present invention relates to a device for reading from and/or writing to optical recording media (1) having an optical scanner (2) for scanning the recording medium (1) by means of a light beam (3) and for generating scanning signals ... | 05/06/2008 |
| 7336574 | Apparatus for detecting abnormal states of laser diode power in an optical disc recording/reproducing device An apparatus for detecting abnormal states which prevents damage to a laser diode or data recorded on a disc and swiftly correcting the abnormal state. An overflow/underflow detector detects whether overflow or underflow of the laser diode occurs, by comparing a las... | 02/26/2008 |
| 7333721 | Data output apparatus An method for simultaneously writing a data stream onto a recording medium with a low writing and reading rate such as an optical disk and outputting a data stream stored on the recording medium. In the method, an inputted data stream is retained by the first buffer... | 02/19/2008 |
| 7327789 | Decoding apparatus, decoding method, decoding program, and decoding program storage medium A decoding apparatus is provided with a decoder for receiving plural bit streams and decoding the respective bit streams to output decoded bit streams, and a decoding state holder for saving and restoring plural states of the decoder. The decoder selects a bit strea... | 02/05/2008 |
| 7308061 | Read channel apparatus and method for an optical storage system A read channel apparatus is disclosed for reading data recorded on an optical storage system at a predetermined baud rate. The apparatus asynchronously samples an analog read signal generating from the optical storage system and subtracts an estimated DC offset from... | 12/11/2007 |
| 7304918 | Servo error signal generation circuit and servo error signal generation method A servo error signal generation circuit comprises a first sampling unit for sampling first detection signals at first sampling timings, a second sampling unit for sampling second detection signals at second sampling timings which are obtained by periodically thinnin... | 12/04/2007 |
| 7289413 | Data slicer and data slicing method for optical disc system In a data slicer and data slicing method for an optical disc system, the data slicer for converting an analog input signal into a digital signal includes a comparator, a duty detector, and a low pass filter. The comparator compares the analog input signal with a fee... | 10/30/2007 |
| 7286447 | Recording and/or reproducing apparatus and method of controlling the same A recording and/or reproducing apparatus and a method of controlling the same. The method of controlling the apparatus for recording information in or reproducing information from a disc having a wobbled track, the method includes detecting a wobble signal recorded ... | 10/23/2007 |
| 7272099 | Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinhole mechanism An exposure apparatus of an optical disk master having a laser source, a deflector for deflecting a recording laser beam obtained based on the laser beam of the laser source and an objective lens for focusing the recording laser beam on an optical disk master, has a... | 09/18/2007 |
| 7266170 | Signal generating circuit, timing recovery PLL, signal generating system and signal generating method A control signal that runs a control oscillator of a signal generation circuit that generates a write clock is taken as a reference signal. That reference signal is supplied to a signal generation circuit that generates a read clock. In the signal generation circuit... | 09/04/2007 |
| 7263054 | Sample-and-hold interface circuit of a pickup head A sample-and-hold interface circuit of a pickup head uses a circuit switch to control a voltage divider. When the circuit switch receives a signal Break, a voltage divider does not consume extra power to decrease the driving power consumption of a pickup head. And a... | 08/28/2007 |
| 7254100 | Optical disk reproducing device selectively using a channel bit frequency or a frequency that is half of the channel bit frequency A data demodulation process rate is varied according to a reproduction state, thereby reducing power consumption while maintaining a reading performance in a favorable state. A channel rate process data demodulation device performs a data demodulation process by emp... | 08/07/2007 |
| 7254811 | Update system and method for updating a scanning subsystem in a mobile communication framework A system, method and computer program product are provided for efficiently updating a scanning subsystem of a mobile communication device. Initially received is a first portion of an update adapted for updating a scanning subsystem of a mobile communication device. ... | 08/07/2007 |
| 7248194 | Bit-detection arrangement and apparatus for reproducing information Disclosed is a bit-detection arrangement able to convert an analog signal (AS) having an amplitude into a digital signal (DS) representing a bit sequence from which the analog signal (AS) is derived. The bit-detection arrangement has a phase detector which detect th... | 07/24/2007 |
| 7242658 | Apparatus to generate a bit clock and a method of generating the bit clock An apparatus and a method to accurately generate a bit clock synchronized with digital data. The apparatus includes an edge detecting unit, a first edge counter, a second edge counter, a first counter, and a bit clock generating unit. The edge detecting unit detects... | 07/10/2007 |
| 7233551 | Optical disk control device for time-division-multiplexing and A/D conversion An optical disk control device comprises a playback signal detection unit for detecting data recorded on a disk by irradiating the disk with a converged light beam; a signal switching unit for successively selecting plural data signals obtained by the playback signa... | 06/19/2007 |
| 7224838 | Method and apparatus for recovery of encoded data using central value The present invention provides a method for comprising data by determining a central value that is greater than the minimum value and less than the maximum value of the range of data. In one embodiment, the central value is chosen to be a value that substantially re... | 05/29/2007 |
| 7224659 | Disk reproducing device with suppressed reproduction signal error An RF signal that is a disk reproduction signal is binarized through an equalizer and a slicer, followed by data demodulation, and an error rate of the reproduction signal is detected in an error detection circuit. If the error rate in the error detection circuit is... | 05/29/2007 |
| 7221632 | Optical disc system and related detecting methods for analysis of microscopic structures An optical disc system includes a photo detector circuit of an optical disc drive and a signal processing system. The photo detector circuit is configured to generate at least one information-carrying signal from an optical disc assembly. The signal processing syste... | 05/22/2007 |
| 7221630 | Information recording medium, information recording and reproduction method, and information recording and reproduction apparatus An information recording medium includes a data area for recording data; and a drive information area for recording at least one piece of drive information. The data area is divided into a plurality of segmented areas in a radial direction of the information recordi... | 05/22/2007 |
| 7218580 | Skew detection method, optical pickup, and optical disc device There is employed a configuration to detect, by making use of an optical pick-up (104) when tracking servo is performed along wobble grooves of an optical disc (102), phase errors between main wobble signal outputted as the result of the fact that refl... | 05/15/2007 |
| 7218394 | Liquid specimen analysis disk assembly The present invention provides a liquid specimen analysis disk assembly, which prevents a liquid specimen from adhering onto a surface of a disk and leaking out of the disk, and is easy to handle during injection of the specimen. The disk assembly includes a guide m... | 05/15/2007 |
| 7215631 | Signal processing device and signal processing method A feedback loop structure including an operational amplifier unit (1) for amplifying a reproduction signal of recorded information and a gain/offset control unit (6) for controlling an amplitude and an offset of an output of the operational amplifier u... | 05/08/2007 |
| 7212476 | Optical disc reproducing device selectively using a channel bit frequency or a frequency that is half of the channel bit frequency A data demodulation process rate is varied according to a reproduction state, thereby reducing power consumption while maintaining a reading performance in a favorable state. A channel rate process data demodulation device performs a data demodulation process by emp... | 05/01/2007 |
| 7212567 | Read channel apparatus and method for an optical storage system A read channel apparatus is disclosed for reading data recorded on an optical storage system at a predetermined baud rate. The apparatus asynchronously samples an analog read signal generating from the optical storage system and subtracts an estimated DC offset from... | 05/01/2007 |
| 7209525 | Clock and data recovery with extended integration cycles Clock and data recovery circuitry includes an interleaved sampler having multiple integrators, where at least one of the integrators integrates the input data for at least two unit intervals (UIs). One embodiment includes a four-way interleaved sampler, where each i... | 04/24/2007 |
| 7206269 | Optical disk recording/reproducing apparatus with reduced resume time The present invention shortens a time to be elapsed from a recording interruption to a recording restart, thereby realizing a reliable recording restart. In one embodiment, an optical disk apparatus comprises an optical pickup and a processor, which includes a repro... | 04/17/2007 |
| 7193952 | Data reproducing apparatus for demodulating data from a reproduction signal In a data recording apparatus, values of parity bits to be additionally provided every one predetermined length block in data obtained by demodulating the original data are determined so as to satisfy a part of or an entire the predetermined run length limitation ru... | 03/20/2007 |
| 7193942 | Phase difference correction apparatus and data reproduction apparatus including data header detection apparatus It is an object of the present invention to provide a phase difference correction apparatus and a data reproduction apparatus including a data header detection apparatus that can synchronize the phase between a clock for reproducing data and an optimum sampling poin... | 03/20/2007 |
| 7170838 | Information recording and reproducing apparatus An optical information recording and reproducing apparatus that determines the quality of recorded information through a beta value from information on the amplitude of a reproduced signal and if the beta value is outside the permissible range, outputs information o... | 01/30/2007 |
| 7167432 | Read and write sample and hold signal generation A system and method for generating sample control signals for a sample and hold circuit used to control access to optical media is provided. The sample control signals are generated with sufficient duration (width) to adequately sample a reflected laser power signal... | 01/23/2007 |
| 7161522 | Severe asymmetry compensator for optical recording PRML read channel An apparatus comprising an analog-to-digital converter, a compensation circuit, a partial response equalizer and a non-adaptive Viterbi decoder. The analog-to-digital converter may be configured to convert an input analog signal into a digital signal. The compensati... | 01/09/2007 |
