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| Number | Title | Issue Date |
| 8184514 | Signal quality evaluating apparatus and method, and information recording medium A signal quality evaluating method necessary for a signal quality evaluation index and a margin design is provided for an apparatus utilizing hologram recording techniques. An evaluation index is used being obtained by dividing root sum square of standard deviations... | 05/22/2012 |
| 8179760 | Reproduction signal evaluation method, information recording medium, reproduction apparatus and recording apparatus A reproduction signal evaluation method according to the present invention relates to adjustment of an edge portion between a shortest mark and a shortest space in a data sequence including marks and spaces in combination that is recordable on an information recordi... | 05/15/2012 |
| 8174947 | Evaluation apparatus and evaluation method An evaluation apparatus includes: a signal reading block; a first waveform equalization block; a boundary detection block; a selective output block; and an evaluation value generation block. ... | 05/08/2012 |
| 8159918 | Reproduction signal evaluation method, reproduction signal evaluation unit, and optical disk device adopting the same A reproduction signal evaluation method evaluates the quality of a reproduction signal reproduced from an information recording medium based on a binary signal generated from the reproduction signal using a PRML signal processing system. The method includes a patter... | 04/17/2012 |
| 8154966 | Apparatus, method and program for waveform equalization on a read signal obtained by reading the record data recorded on a recording medium An information reproducing apparatus (1) is provided with: an offset adding device (19-1, 19-2) for adding an offset value (OFS) which can be set to be variable, to a read signal (RRF) read from a recording medium (100);... | 04/10/2012 |
| 8130617 | Method of controlling playback condition, optical disk, optical disk drive device and program Playback durability of a writable optical disk is ensured. A method of controlling a playback condition includes continuously irradiating an optical disk with a laser beam having a power level lower than a mark formation level and detecting a change of a state of a ... | 03/06/2012 |
| 8107339 | Method of evaluating reproduce signal and optical disc drive A highly efficient and reliable reproduced signal evaluation method and an optical disc drive using that method in which assuming that the number of 2T's appearing successively in a predetermined evaluation bitstream is i, the evaluation bitstream is divided into a ... | 01/31/2012 |
| 7974168 | Data storage medium reproducing device and method for reproducing data storage medium A reproducing device includes a detection circuit and an integration circuit. The detection circuit detects a push-pull signal PP. The integration circuit carries out integration processing with respect to one or greater frames of the push-pull signal, and carries o... | 07/05/2011 |
| 7965600 | Data recording evaluation method and optical disk recording and reproduction device Novel evaluation indexes are introduced to allow both a total evaluation of data recording and an evaluation of individual detection patterns. A data recording evaluation method includes a step of reproducing a result of data recording performed on an optical disk a... | 06/21/2011 |
| 7843787 | Recording apparatus A recording apparatus includes a write unit to write information data read from a memory by irradiating a disk medium with a beam in accordance with the information data, and a control unit to, upon the amount of information data stored in the memory reaching a thre... | 11/30/2010 |
| 7821897 | Information recording/reproducing apparatus and information recording method An information recording method using a read modify write operation includes determining whether a write command is inconsistent or not, on the basis of a unit of a cluster. When the write command onto the rewritable type optical disk needs verification and the read... | 10/26/2010 |
| 7680008 | Recording method and apparatus for optical disk drive A recording method for an optical disk drive is implemented as follows. First, at least one of the level of the focusing error signal, the level of the tracking error signal, a wobble synchronization pattern loss, the error rate of demodulating a wobble signal, the ... | 03/16/2010 |
| 7652964 | Optical disk device An optical disk device includes a recording and reading means which performs recording of data upon, or reading of data from, an optical disk upon which are stored an ID, number of times information, and recording management information. Furthermore, when recording ... | 01/26/2010 |
| 7613093 | Duty ratio control apparatus for pre-pit detection or header detection of an optical storage medium A pre-pit signal generating device includes: a first slicer for generating a sliced signal corresponding to a push-pull signal based on a first reference level; a duty ratio controller coupled to the first slicer for adjusting the first reference level or the push-p... | 11/03/2009 |
| 7580333 | Optical disk apparatus In an optical disk apparatus, when the write-in process to the optical disk is interrupted, a data processing part and an encoder part are set to be in the waiting state after an access to a data storing part is completed, so as to stop accessing the data storing pa... | 08/25/2009 |
| 7564756 | Reproduction device and method wherein detection of sub-data generated within a controlled time period controls appropriate decryption A reproducing device includes a detection circuit and an integration circuit. The detection circuit detects a push-pull signal PP. The integration circuit carries out integration processing with respect to one or greater frames of the push-pull signal, and carries o... | 07/21/2009 |
| 7539107 | Optical recording medium, recording method and apparatus for optical recording medium, and reproducing method and apparatus An optical recording medium has a track including plural pits formed based on first data and has plural lands defined between neighboring pits. These pits are deformed as they are recorded based on second data. The first and second data are synthesized and reproduce... | 05/26/2009 |
| 7522504 | Signal quality evaluation method, information recording/reproducing system, and recording compensation method Signal quality evaluation is performed using a predetermined reproduction signal, a first pattern corresponding to a signal waveform pattern of the reproduction signal, and a given pattern corresponding to the signal waveform pattern of the reproduction signal and b... | 04/21/2009 |
| 7515517 | Method and apparatus for data detection in blue laser optical disk drives A method and apparatus in an optical disk system employing a look-ahead data detection technique is described where an optimum detection is achieved with a minimum hardware complexity. In one embodiment, the boundary functions and the corresponding boundary decision... | 04/07/2009 |
| 7489607 | Method of inspecting a phase-change type optical recording medium The invention aims at enabling degradation of quality of a regenerative signal due to repetitive overwrite in a high temperature environment to be evaluated based on an inspection under a room temperature environment for a repetitively rewritable phase-change type o... | 02/10/2009 |
| 7486601 | Method and related apparatus for generating fixed packets while writing data to CDs Method and related apparatus for generating fixed packets while writing data into CDs. The present invention records a total-block number of a write-in data with a counter, and a waiting-coding number with another counter, so as to generate fixed packets efficiently... | 02/03/2009 |
| 7477584 | Recording and/or reproducing apparatus and method with a signal quality determining device and method A recording and/or reproducing apparatus and method with signal quality determining device and a method thereof, with the signal quality determining device including a signal estimator determining a level corresponding to a sample value of the RF signal using binary... | 01/13/2009 |
| 7471603 | Optical analyzer There is provided an apparatus capable of switching between a laser that emits light having a wavelength suitable for detecting samples and a laser required for reading traced data, while an analysis optical disc is being traced. In an analyzer in which an analysis ... | 12/30/2008 |
| 7453783 | Information storage apparatus An information storage apparatus records, reproduces and/or erases information with respect to a recording medium. The apparatus includes a servo error generation detector for detecting a generation of a servo error based on at least one of servo signals including a... | 11/18/2008 |
| 7440378 | Information storage medium and method and apparatus for recording/reproducing data A read-only information storage medium having one or more recording layers and a method and apparatus reading/reproducing data, the read-only information storage medium having one or more recording layers, each layer containing a lead-in area, a user data area, and ... | 10/21/2008 |
| 7437053 | Digital video recorder, method of driving the video recorder and program A digital video recorder writes data on a selected one of a first storage medium and a second storage medium. The recorder includes an abnormal state detector for detecting any abnormal event that possibly occurs while the recorder is writing the data on the first s... | 10/14/2008 |
| 7428200 | Method for triggering through disc grooves and related optical analysis discs and system An optical analysis disc includes grooves defining corresponding laser-readable tracks and trigger marks that identify respective target regions on the disc. The trigger marks are implemented as a radial interruption of the grooves to thereby produce an increased re... | 09/23/2008 |
| 7428203 | Signal evaluation method, information recording/reproducing apparatus, information reproducing apparatus, and information recording medium Reproduction signals include patterns for which recognition errors are likely. With respect to such patterns, probable error patterns are prepared. Tables showing correct patterns and error patterns are prepared, and evaluation values accurately representing signal ... | 09/23/2008 |
| 7417929 | Optical disk data processing device and data recording/reproduction device having interruption and restart of write processing on the recording medium The objective of this invention is to provide a type of data processing device and a type of data recording/reproduction device that can restart data write processing correctly from an interruption position after data write processing on a recording medium is interr... | 08/26/2008 |
| 7414935 | Method of overwriting optical disk with adapting initial writing conditions An optical recording method is designed for recording data on a recordable optical disk by use of a laser beam of a present recording apparatus under a desired recording condition. The method detects identification information which is reserved in the optical disk a... | 08/19/2008 |
| 7403469 | Data management information obtaining method for obtaining data management information including information concerning part of data areas as information concerning a pseudo area On an information recording medium, a recording area is divided in a plurality of data areas, and data is recorded on each of the data areas. In response to a request for obtaining data management information concerning a recording of the data recorded on each of th... | 07/22/2008 |
| 7397749 | Optical writing apparatus and method for controlling execution time of writing thereof A method of controlling an optical writing apparatus and an optical writing apparatus utilizing the method to control its write execution time include a pickup to write write data onto a writing medium, a servo driving portion to control the drive of the pickup, a c... | 07/08/2008 |
| 7397748 | Optical recording medium, recording method and apparatus for optical recording medium and reproducing method and apparatus An optical recording medium having a track including plural pits formed based on first data and lands defined between neighboring pits, these pits are deformed as they are recorded based on second data. The first and second data are synthesized and reproduced to rea... | 07/08/2008 |
| 7391693 | Information provision apparatus An information provision apparatus has a detachable information storage medium that stores information, an information storing portion that storing information read from the information storage medium, a processing portion that performs a reproduction processing of ... | 06/24/2008 |
| 7388816 | Data reproducing apparatus including subsignal generated from ID information Described herewith is an optical disk manufacturing apparatus for reading recorded digital data from an optical disk, comprising an encryption unit (22, 23) for encrypting entered digital data according to a plurality of key information; an optical disk subst... | 06/17/2008 |
| 7382707 | Recording method and apparatus for optical disk drive A recording method for an optical disk drive is implemented as follows. First, at least one of the level of the focusing error signal, the level of the tracking error signal, a wobble synchronization pattern loss, the error rate of demodulating a wobble signal, the ... | 06/03/2008 |
| 7379398 | Optical disc apparatus, an optical disc method, and a semiconductor integrated circuit capable of adjusting a focus position of a light beam and a spherical aberration An optical disc apparatus includes a control section. The control section performs a first search while the tracking control is in the off state. The first search is for searching for a plurality of sets of the focus positions of the light beam and the spherical abe... | 05/27/2008 |
| 7372790 | Apparatus and method for manufacturing optical disks, apparatus and method for recording data on optical disks, apparatus and method for reproducing data from optical disks, and optical disks, and optical disk formed with pit strings and mark strings Described herewith is an optical disk manufacturing apparatus for reading recorded digital data from an optical disk, comprising an encryption unit (22, 23) for encrypting entered digital data according to a plurality of key information; an optical disk subst... | 05/13/2008 |
| 7372789 | Information recording and reproducing apparatus, and information recording and erasing method When data is recorded on an optical disc capable of recording information only once, such as a DVD-R and the like, encrypted data obtained by encrypting the recording data and a key for decrypting the encrypted data are generated, and they are recorded in different ... | 05/13/2008 |
| 7372792 | Write-once optical disc, method and apparatus for recording management information on write-once optical disc A write-once optical disc, and a method and apparatus for recording management information on the write-once optical disc, are provided. The optical disc includes at least one recording layer, and at least one SRR entry. Each SRR entry corresponds to an SRR and incl... | 05/13/2008 |
