Class / Patent application number | Description | Number of patent applications / Date published |
369530440 | Of storage or retrieval information signal | 28 |
20090073839 | REPRODUCTION APPARATUS AND METHOD - According to one embodiment, there is disclosed a reproduction apparatus includes a determination unit determining a preset reproduction limit level of the reproduction apparatus, a generator generating message data in accordance with the reproduction limit level, a reader reading data recorded in a recording medium, a reproduction unit reproducing data read from the reader, a detector detecting a reproduction limit level of the recording medium from data read from the reader, and a display unit comparing the reproduction limit level of the recording medium with the reproduction limit level of the reproduction apparatus, and stopping reproduction of the data of the generator in accordance with the comparison result, and further, displaying a message generated by the generator. | 03-19-2009 |
20090122680 | Method for determining a parameter space for finding optimal operating parameters for reading or writing a storage medium - A method for determining a parameter space for finding optimal operating parameters for reading or writing storage medium is provided. In an embodiment of the invention, the method includes: setting a first parameter range of a first operating parameter and a second parameter range of a second operating parameter; normalizing the first and the second parameter ranges respectively and forming an initial parameter space based on the normalized first and second parameter ranges; and rotating the initial parameter space by a rotation angle and forming an actual parameter space based on the rotated initial parameter space. The actual parameter space is expected to result in more reliable optimal operating parameters. | 05-14-2009 |
20090147646 | APPARATUS AND METHOD TO VISUALLY INDICATE THE STATUS OF A DATA STORAGE DEVICE - A data storage and retrieval system that comprises a data storage device is disclosed. The data storage and retrieval system further comprises a first LED, a second LED, a third LED, and a fourth LED, interconnected with the data storage device. The data storage device causes the first LED and the second LED to emit first light comprising a first color if the data storage device detects an internal failure. Alternatively, the storage device causes the third LED and the fourth LED to emit second light comprising a second color if the data storage device remains operative. | 06-11-2009 |
20090190454 | INFORMATION APPARATUS - A test unit is provided for executing a confirmation test on the storage area of the storage apparatus. A storage area management unit sets an accessible valid storage area in the storage area, and extends the accessible valid storage area to include a part of the storage area. The part of the storage area used to extend the accessible valid storage is confirmed for normal operation by the test unit. | 07-30-2009 |
20090231975 | RECORDING/REPRODUCING APPARATUS AND RECORDING/REPRODUCING METHOD - A recording/reproducing apparatus is disclosed that includes a spindle motor unit including a spindle on which a flexible recording disk is placed, a stabilizer plate disposed so as to face the recording disk, a torque detection unit configured to detect a drive torque applied to the spindle motor unit, an adjustment unit configured to adjust a gap between the recording disk and the stabilizer plate, and a determination unit configured to determine an optimal gap to be set to the gap based on the drive torque detected by the torque detection unit, in which the adjustment unit sets the optimum gap determined by the determination unit to the gap. | 09-17-2009 |
20090245058 | INFORMATION PROCESSING APPARATUS AND METHOD, PROGRAM, RECORDING MEDIUM, AND INFORMATION PROCESSING SYSTEM - An information processing apparatus includes a measuring unit, a transmitter, and a receiver. The measuring unit first measures the performance of the information processing apparatus. The transmitter then transmits measurement results in the form of information indicating the performance measured by the measuring unit, together with a content request requesting desired content, to another information processing apparatus. The receiver subsequently receives content from the other information processing apparatus that has been supplied according to the content request and selected on the basis of the measurement results. In so doing, the information processing load is suitably adjusted according to the performance of the information processing apparatus. | 10-01-2009 |
20100067343 | Information Processing Apparatus, Health Check Method, and Storage Medium - According to one embodiment, an information processing apparatus includes an optical disk drive, a power supply module configured to supply power to the information processing apparatus, an acquisition module configured to start acquisition of status information of the optical disk drive when the power supply module supplies power to the information processing apparatus, a storage module configured to store feedback information corresponding to each condition predetermined for the status information of the optical disk drive, and a notification module configured to notify the apparatus of feedback information which is read from the storage module in correspondence with the condition when the status information of the optical disk drive acquired by the acquisition module matches the condition. | 03-18-2010 |
20100091629 | Method for detecting short burst errors in LDPC system - The present invention is a device for detecting short burst errors. The device includes a first signal input, wherein the first signal input is configured to receive a first signal. The device includes a second signal input, wherein the second signal input is configured to receive a second signal. The device includes a logic gate, wherein the logic gate is operable for receiving the first signal vial the first signal input, receiving the second signal via the second signal input, and generating a logic output gate signal based on the received first signal and the second signal. Furthermore, the device includes a filter, wherein the filter is configured for receiving the logic output gate signal from the logic gate and generates a filter output signal based upon the received logic output gate signal, wherein the filter output signal is operable for flagging errors. | 04-15-2010 |
20100188953 | RECORDING/REPRODUCTION DEVICE, EVALUATION VALUE CALCULATION METHOD, AND EVALUATION VALUE CALCULATION DEVICE - In a recording/reproducing system that performs PRML decoding, a suitable evaluation value for setting a recording condition can be obtained with a simple structure. It is assumed that a value corresponding to a difference between a difference metric between a maximum likelihood path for an equalized signal that is fed to maximum likelihood decoding processing and a path in a bit-advanced shift direction and a difference metric between the maximum likelihood path for the equalized signal and a path in a bit-delayed shift direction is a signal quality evaluation value dSAM. Further, the signal quality evaluation value dSAM is calculated using an equalization error value ek which is an error between an equalized signal value fed to the maximum likelihood decoding processing and an ideal equalized signal value determined from a decoded signal obtained as a result of the maximum likelihood decoding processing. | 07-29-2010 |
20100214898 | INFORMATION RECORDING MEDIUM, ADDRESS GENERATION AND DETECTION METHOD, AND REPRODUCING AND RECORDING APPARATUSES - In a recording medium, an extension address is obtained without changing the number of bits of the address embedded in the wobble. The wobble address is partially or wholly encoded to embed the address information. At the time of reproducing the address information, the original address information is obtained by restoring the embedded information by the decoding process. | 08-26-2010 |
20100329095 | METHOD FOR DETERMINING RECORDING CONDITION OR REPRODUCING CONDITION, INTEGRATED CIRCUIT, AND OPTICAL DISK DEVICE - A process which is performed by a recording/reproducing device configured to irradiate an optical recording medium including a plurality of recording layers with laser light to record and reproduce data, and is for determining at least one of a recording condition at the time of recording user data on any one recording object recording layer of the plurality of recording layers, or a reproducing condition at the time of reproducing the data from the recording object recording layer, where record management data indicating a recorded area on the recording layers is recorded on the optical recording medium. The process includes: acquiring a remaining capacity of a test recording area for each of the recording layers based on the record management data; and determining a recording layer on which test recording is intended to be made based on the remaining capacities of the test recording area acquired for the recording layers. | 12-30-2010 |
20110013499 | RECORDING APPARATUS AND METHOD, AND COMPUTER PROGRAM - A recording apparatus ( | 01-20-2011 |
20110158074 | OPTICAL DISC DEVICE AND DISC IDENTIFICATION METHOD - To identify the type of a loaded disc, there is provided an optical disc device, comprising: a light source driven by a drive signal with a high frequency signal superimposed; a detector for detecting return light emitted from the light source; and a controller for controlling the amplitude of the high frequency signal to be superimposed on the drive signal, the optical disc device being configured to read data from an optical disc loaded therein by a signal outputted from the detector, wherein: the controller causes the light source to irradiate the loaded optical disc with light in a condition in which a high frequency signal different from a high frequency signal for data reading is superimposed on the drive signal; and the controller identifies a type of the loaded optical disc based on the return light from the loaded optical disc. | 06-30-2011 |
20110228660 | METHOD AND APPARATUS FOR MEASURING A SIGNAL, METHOD OF TESTING WITH A SPINSTAND, A METHOD OF WRITING A TEST DATA PATTERN AND A SPINSTAND - There is disclosed a method and apparatus for measuring a signal using a measurement system. The signal has a frequency component that is to be detected by the measurement. The frequency component has a varying phase. The signal has at least one interruption thereto. The method includes: processing the signal with the measurement system to detect the frequency component in the signal and stalling the measurement system before the start of the interruption. The stall period is calculated such that the processing of the signal is resumed: i) after the end of the interruption, and ii) where there is substantially no discontinuity between the phase of the frequency component in the signal at the end of the stall and in the phase of the frequency component in the signal at the beginning of the stall. | 09-22-2011 |
20120063284 | Systems and Methods for Track to Track Phase Alignment - 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 data buffer, an inter-track interference response circuit, an inter-track interference signal estimator circuit, and a sync mark detector circuit. The data buffer is operable to store a previous track data set that includes a first sync pattern. The inter-track interference response circuit is operable to estimate an inter-track interference response from the previous track data set based at least in part on the previous track data set and a current track data set. The current track data set includes a second sync pattern. The inter-track interference signal estimator circuit is operable to calculate an inter-track interference from the previous track data set based at least in part on the previous track data set and the inter-track interference response from the previous track data set. The sync mark detector circuit operable to identify the first sync pattern in the inter-track interference from the previous track data set in the current track data set. | 03-15-2012 |
20120063285 | METHOD AND APPARATUS FOR MANAGING DISC DEFECTS USING UPDATEABLE DMA, AND DISC THEREOF - A reproducing apparatus is provided. The reproducing apparatus includes a recording/reading unit that records data on or reads data from a disc including a defect management area in which defect information regarding data recorded in a data area of the disc and defect management information for managing the defect information are repeatedly recorded, and a controller that controls the recording/reading unit to read the defect information and the defect management information from the defect management area, and read data from the disc using the defect information. First defect information, which is repeatedly recorded, includes second defect information which is recorded in a predetermined area and defect information regarding a defective block occurring after the second defect information is recorded. The defect management information includes location information of the defect information. | 03-15-2012 |
20120106309 | ELIMINATION OF DUPLICATE WRITTEN RECORDS - A storage device includes first and second buffers. A request to write a new record from a host is received. A hash value (new S) of the new record is calculated. The hash value (new S) of the new record is checked to determine if the hash value exists in a second buffer. If the new S exists in the second buffer, the new record is compared with a record stored in the second buffer corresponding to the new S to check if the new record and the stored record in the second buffer match each other. If the new record and the stored record match each other, a pointer (a record number) is written as write data of the new record to the recording medium. The pointer points to the record already stored in any one of a recording medium and the second buffer. | 05-03-2012 |
20120113786 | SMART OPTIMIZATION OF TRACKS FOR CLOUD COMPUTING - Optimization of tracks on a hard disk includes: determining I/O characteristics for data clusters to be stored on the hard disk; generating a set of solutions for each possible placement configuration; for each solution, calculating a plurality of cost functions using the I/O characteristics for the plurality of data clusters; for each solution, calculating a membership value using the cost function values; for each solution, calculating a fitness value using the membership value; retaining the solutions with the fitness value greater than a predetermined threshold; determining whether at least one stopping condition has been met; if not, adding new solutions to the retained solutions to generate the next set of solutions; and repeating the calculating the membership value, the calculating the fitness value, and the retaining the solutions with the fitness value greater than the predetermined threshold until at least one stopping condition has been met. | 05-10-2012 |
20120147723 | INFORMATION RECORDING DEVICE, INFORMATION REPRODUCING DEVICE, RECORDING MEDIUM MANUFACTURING DEVICE, INFORMATION RECORDING MEDIUM, METHOD, AND PROGRAM - An information recording processing constitution realizing both readout difficulty and high-precision readout is provided. Superimposition recording of highly secret additional information such as a cryptographic key in a groove signal recorded on a disk, which superimposition recording realizes both readout difficulty and high-precision readout, can be performed. The groove signal to which a phase error corresponding to a bit value is set is recorded at a time of recording of the additional information, and at a time of readout of the additional information, the phase error of the groove signal in a predetermined section is subjected to an integrating process and the direction of the phase error of the groove signal within each section is determined. The recording and reproduction of the additional information for increasing readout difficulty and realizing high-precision readout is realized by such processes. | 06-14-2012 |
20120155239 | CHANNEL CIRCUIT AND METHOD OF DETECTING DEFECT OF MAGNETIC DISK DRIVE - A channel circuit includes: a detecting module configured to sample a signal amplitude of a reproduced signal of a single-frequency pattern written on a medium, and to detect an amplitude change that is lower or higher than a threshold; and a judgement module configured to judge whether the reproduced signal is decodable by a decoding circuit or not based on a result of detection by the detecting module. | 06-21-2012 |
20120236700 | MEDIA PROCESSING SYSTEM, CONTROL METHOD FOR MEDIA PROCESSING SYSTEM, AND MEDIA PROCESSING DEVICE - A media processing system that produces discs with assured quality suited to long-term data storage. A data write unit writes data on a recording surface of a disc. A label print unit prints on the label side of the disc. An error rate measurement unit measures the error rate of the disc D after writing data is completed. An error rate evaluation unit determines if the media error rate measured by the error rate measurement unit is less than or equal to a preset threshold value. When the error rate evaluation unit determines that the media error rate is less than or equal to the threshold value, the label print unit prints a label image on the label side. | 09-20-2012 |
20120263028 | REPRODUCING SYSTEM FOR MEDIUMS AND METHOD FOR REPRODUCING DIGITAL DATA AND IDENTIFYING THE SAME - A method for reproducing digital data and identifying the same by executing a software program stored in a memory of a computer is disclosed. The method includes: reading digital data; identifying total size of the digital data; saving the digital data as a temporary file; receiving a request for selecting at least one target medium, wherein the target medium is used for storing the digital data; determining a quantity of the target medium to be used for writing; writing the digital data into the target medium; generating a list text file and an index text file into each target medium, wherein the list text file includes information regarding to the content stored in each target medium respectively and the index text file includes information regarding to the content in all target medium; and building an index database of the digital data. | 10-18-2012 |
20130223199 | STORAGE MEDIA INTER-TRACK INTERFERENCE CANCELLATION - Described embodiments provide a method of cancelling inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A read channel reads sectors in a desired track of the storage medium. An iterative decoder of the read channel decodes the read sectors, and if the read sectors are incorrectly recovered from the storage medium, selected sectors of a first adjacent track are read. An ITI canceller of the read channel estimates ITI in the read sectors of the desired track corresponding to the selected sectors of the adjacent track and subtracts the estimated ITI of the adjacent track from the data for the sectors of the desired track, providing updated sector data. The ITI cancelled data is replayed to the iterative decoder, which decodes the ITI cancelled data and provides the decoded ITI cancelled data as output data of the read channel. | 08-29-2013 |
20130308434 | OPTICAL READ/WRITE APPARATUS - This optical read/write apparatus has first and second optical heads | 11-21-2013 |
20140064051 | DISC PLAYER AND COMMUNICATION METHOD - A communication method is executed by a disc player to communicate with an external device. The disc player loads and reads a plurality of test discs. The disc player includes an audio interface, and a video interface. The communication method includes steps of: reading a loaded test disc to generate test information; determining whether the disc player successfully reads the loaded test disc based on the test information; and generating and transmits a test signal to the external device via one of the audio interface and the video interface based on the determined result, for controlling the external device to assist the disc player to complete the test. | 03-06-2014 |
20140334281 | Systems and Methods for Data Processor Marginalization Based Upon Bit Error Rate - Systems, methods, devices, circuits for data processing, and more particularly to data processing including operational marginalization capability, and/or operational improvement capability. | 11-13-2014 |
20150146510 | SERVER SYSTEM AND CONTROL METHOD FOR READ/WRITE INDICATOR LIGHT - A server system and a control method for a read/write indicator light are disclosed, in which a serial general purpose input/output signal is issued when a read/write action occurs, a bit of effective non-zero data is written into a register when the SGPIO signal has a level change, a content of the register is checked out every predetermined period, and a drive signal is outputted to drive the read/write indicator light to blink when the data in every bit of the register is not all non-zero, whereby achieving in a technical efficacy of promoting recognizability of the read/write indicator light. | 05-28-2015 |
20150340064 | TAPE MEDIA KISS-CONTACT READ VERIFICATION - A supplemental module that includes one or more read elements periodically engages a magnetic recording medium, and the read elements generate an electrical signal corresponding to transitions written to the magnetic recording medium by a write element. A computer receives information representative of the electrical signal and determines if a quality metric of the magnetic recording medium derived from the electrical signal is within a defined range. If the quality metric is not within the defined range, a defined action is performed by the computer. | 11-26-2015 |