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| Number | Title | Issue Date |
| 8154972 | Systems and methods for hard disk drive data storage including reduced latency loop recovery Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is discussed that includes a summation circuit, a data detector circuit, an error feedback circuit, and an error calculation circui... | 04/10/2012 |
| 8107340 | Electronic apparatus with adjustable power consumption The invention provides an electronic apparatus. In one embodiment, the electronic apparatus comprises an analog-to-digital converter (ADC) and an enable device. The analog-to-digital converter converts an analog input signal to a digital output signal with a resolut... | 01/31/2012 |
| 8085639 | Information reproducing device An A/D converter samples a read signal in synchrony with a system clock sclk having a fixed frequency, to perform an A/D conversion. A fluctuation compensator is configured as an internal-feedback-type compensation filter, and suppresses fluctuation of a digital sig... | 12/27/2011 |
| 8054725 | Optical disk apparatus An optical disk apparatus for writing signals on a recording medium by irradiating the recording medium with a laser beam modulated based on the signals includes a first converting unit for converting a first reflected laser beam component from the recording medium ... | 11/08/2011 |
| 7957244 | Method of reading optical information in super-resolution The invention relates to the reading of digital optical recordings at very high density (CD, DVD, etc.). Reading is done by a PRML (“Partial Response Maximum Likelihood”) technique which uses a model of analog response to the recording of an isolated information... | 06/07/2011 |
| 7940625 | Method and apparatus for control of a write signal in an optical disc system The present invention provides for an apparatus and method of controlling writing a signal to an optical disc in an optical disk system and including the step of generating a feedback signal to dynamically tune the signal output from a laser source, and including ge... | 05/10/2011 |
| 7778133 | Optical Information recording/reproducing apparatus An optical information recording/reproducing apparatus is adapted to record and/or reproduce multilevel information on/or from an optical information recording medium. The multilevel information is recorded in the form of pits in cells virtually formed at regular in... | 08/17/2010 |
| 7773480 | Device, method for processing RF signal, and optical disk drive utilizing the same A device for processing a radio frequency (RF) signal of an optical disk drive includes a high-pass (HP) filter, an RF variable gain amplifier (VGA), an RF analog-digital converter (ADC), and a digital module. The HP filter filters the RF signal and is capable of se... | 08/10/2010 |
| 7668063 | Optical disk device A parameter acquisition unit acquires parameters of a write strategy corresponding to the type of an optical disk upon which data is to be recorded, and a recording unit irradiates pulse modulated laser light upon the optical disk based upon the parameters of the wr... | 02/23/2010 |
| 7616547 | High-speed mixed analog/digital PRML data detection and clock recovery apparatus and method for data storage A high-speed mixed analog/digital PRML data detection and clock recovery apparatus and method. The high-speed mixed analog/digital PRML data detection and clock recovery apparatus includes a variable gain amplifier, an analog equalizer, an analog-to-digital (A/D) co... | 11/10/2009 |
| 7567491 | Slicer bias loop A bias loop is provided for automatic threshold level adjustment in data detectors, such as a slicer detectors or threshold detectors. The bias loop monitors characteristics of the data detector's output, such as its digital sum value, to generate a signal correctio... | 07/28/2009 |
| 7548504 | Input sampling circuit and method for processing disc read back signal An input sampling circuit for processing a disc read back signal to generate a digital signal includes an auto gain control (AGC) unit for adjusting a gain value of the disc read back signal, a low-pass filter/equalizer (LPF/EQ) coupled to the AGC unit for low-pass ... | 06/16/2009 |
| 7492690 | Statistical circuit The statistical circuit includes a pulse-width measuring unit, serially coupling delay units, a logical circuit and counters. The pulse-width measuring unit is for receiving a sampling signal and generating a pulse-width signal. A pulse occurs on the pulse-width sig... | 02/17/2009 |
| 7471607 | Mixed mode data slicer with auto calibration and method thereof The present invention discloses a mixed mode circuit for data slice with auto calibration and method thereof, which comprises a data slicer for converting an analog signal into a digital signal; a set of current pump for supplying a variable power supply; a micropro... | 12/30/2008 |
| 7423949 | Reproducing apparatus and method, and recording and reproducing apparatus A signal of a run-length-limited code is read out from a recording medium. The read-out signal is converted into a reproduced digital signal. A decoder subjects the reproduced digital signal to first decoding different from run length decoding to get a first decoded... | 09/09/2008 |
| 7408861 | Recording or reproduction apparatus for optical recording media having means for increasing the resolution of a digital-to-analog converter in the servo regulating circuit The invention relates to a recording or reproduction apparatus for optical recording media having means for increasing the resolution of a digital-to-analog converter (DA), such as, for example, a digital-to-analog converter (DA) which is provided in the servo regul... | 08/05/2008 |
| 7385900 | Reproducing apparatus A transversal filter subjects a reproduced signal to partial-response waveform equalization responsive to tap coefficients to generate an equalization-resultant signal. There is generated 0-point information representing whether or not the reproduced signal correspo... | 06/10/2008 |
| 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 |
| 7359998 | Low-power CD-ROM player with CD-ROM subsystem for portable computer capable of playing audio CDs without supply energy to CPU A low-power audio CD player for portable computers permits operation of the CD-ROM subsystem when power is not being supplied to the computer subsystem. In one embodiment of the invention, the computer subsystem comprises a system CPU, a digital-audio generating cir... | 04/15/2008 |
| 7359291 | Magneto-optical storage medium capable of recording plural rows of marks on each track An optical disk recording method of recording data on an optical disk by applying laser light to a track of the optical disk, includes the steps of a) driving a plurality of laser light sources in sequence in a time division manner, and applying a light flux to one ... | 04/15/2008 |
| 7355938 | Timing recovery method and storage apparatus for suppressing control of sampling positions A timing recovery method samples, equalizes and detects a signal reproduced from a recording medium and to output a detection signal, controls sampling positions based on a phase error between the equalized signal and the detection signal, and obtains likelihood inf... | 04/08/2008 |
| 7339875 | Information storage medium, playback and recording method An information storage medium includes a substrate forming a first groove having a depth, and a second groove adjacent to the first groove and different depth from the first groove; and a recording layer formed on the substrate to record information marks, making op... | 03/04/2008 |
| 7333568 | Data slicer capable of calibrating current mismatch A data slicer includes a comparator coupled with an input signal and a reference signal for generating a sliced signal, a waveform generator for generating a calibration signal, a pulse extension device coupled to the comparator and the waveform generator for modify... | 02/19/2008 |
| 7330881 | Music-data reproducing system using a download program A data card 101 with music data accumulated therein is inserted into a portable telephone 110 to fetch the music data into the portable telephone, and application software suitable for a music data format prescribed in association with the music data i... | 02/12/2008 |
| 7325131 | Robust watermark for DSD signals A robust watermark embedded into a Direct Stream Digital (DSD) audio signal including a flat frequency response in a specific frequency range which does not extend below 20 kHz or above 100 kHz. The watermark is therefore hidden in the noise spectrum of the DSD sign... | 01/29/2008 |
| 7313069 | Optical recording medium and recording apparatus, the medium including a linking region between unit block regions An optical recording medium having a track on which data has been previously recorded, comprising on the track a plurality of data block regions each of which includes main data of a block which is divided into a predetermined number of main data pieces, each of whi... | 12/25/2007 |
| 7310823 | Digital information recording apparatus and outputting apparatus A digital information recording apparatus includes multiple recording circuits for making multiple copies. The apparatus limits the number of copies, however, in accordance with copy information provided within the digital information itself. When the number of copi... | 12/18/2007 |
| 7307936 | Disk drive device and address detection method with binarized push-pull signal A disk drive device capable of satisfactorily detecting address information recorded by land prepits even after data is recorded is provided. When address information recorded by land prepits is detected from a disk on which lands and grooves as recording tracks are... | 12/11/2007 |
| 7304714 | Use of optical sensor in motion picture film projector lamphouse to detect state of projector to prevent interruption of feature film presentation by kodak digital cinema system designed for cinema advertising A system that determines a projector's true state in an automatic projection sequence. The system includes a projector in a primary display system, having a lamp for displaying visual information; and a sensor to determine the state of the lamp in the primary displa... | 12/04/2007 |
| 7302019 | Maximum likelihood decoding method and maximum likelihood decoder A maximum likelihood decoder includes metric generators for generating metrics based on a plurality of partial responses and a Viterbi decoder for realizing maximum likelihood decoding by using a synthetic metric generated by synthesizing the metrics. A first partia... | 11/27/2007 |
| 7295502 | Optical desk apparatus An error pulse is generated from a PRML circuit, and reproduction compatibility with a conventional apparatus is established. After a reproducing signal output from an optical head is equalized by an analog equalizer, sampled by an A/D converter at every clock, and ... | 11/13/2007 |
| 7289409 | Method for processing a wobble signal A wobble signal is generated from at least two elementary signals (A,B,C,D) detected by scanning a wobbled track of a data carrier. The invention proposes a solution for eliminating the noise of various origins in the wobble signal, notably the high frequency data l... | 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 |
| 7280455 | Optical information recording condition adjustment method, recording/reproducing method and apparatus The recording strategy is optimized by determining a pulse response so as to minimize the difference between the reproduced waveform obtained by recording and reproducing the recording pulse signal wherein the record data is superposed with a high-frequency pulse an... | 10/09/2007 |
| 7281273 | Protecting content on medium from unfettered distribution Digital content is encrypted according to a content key (CK) to form (CK(content)) and such (CK(content)), a license generator, a start-up file, and license-generating information are placed on a digital storage medium. The license generator is for generating a digi... | 10/09/2007 |
| 7272092 | Adaptive level-cutting method of CD-ROM drive's radio frequency ripple signal An adaptive level-cutting method of a radio frequency ripple signal for a CD-ROM drive is proposed. A digital signal processor is added to accomplish adaptive cutting of the central level of the radio frequency ripple signal for generating an accurate radio frequenc... | 09/18/2007 |
| 7269105 | Digital audio recording medium and reproducing apparatus thereof A DVD audio data structure following high-sound-quality specifications is realized, making the best use of the audio data structure standard in DVD video. A first sample data string created by digitizing a first channel audio signal at a first sampling frequency in ... | 09/11/2007 |
| 7263271 | System of sharing objects having a plurality of contents In order to use video contents created according to DVD video in DVD audio, audio and video sub-directories are located under a root directory. The video sub-directory includes video contents and their management information. The audio sub-directory includes audio c... | 08/28/2007 |
| 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 |
| 7263201 | Record carrier with watermark A record carrier includes a pattern of substantially parallel tracks for storing data in the form of marks, in which the data is encoded by a channel code. A watermark is provided by controlling the parameter of the channel code so as to introduce a predetermined ru... | 08/28/2007 |
