| Entries |
| Document | Title | Date |
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| 20080198714 | OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING METHOD, AND OPTICAL INFORMATION RECORDING APPARATUS - An information recording medium according to the present invention includes a plurality of recording layers, and a test area for determining a recording power of a laser light for each of the plurality of recording layers, in which a first test area of a first layer and a second test area of a second layer adjacent to the first layer are provided at different radial positions. | 08-21-2008 |
| 20080198715 | RECORDING METHOD, REPRODUCTION METHOD, RECORDING APPARATUS, REPRODUCTION APPARATUS, AND INFORMATION RECORDING MEDIUM - A recording method for recording, on a write once type information recording medium, management information representing a recording state of the write once type information recording medium is provided. The information recording medium includes data including a first synchronization signal. The information recording medium has a second synchronization signal pre-recorded by cutting. The recording method includes the steps of (a) performing a recording operation for recording the management information at a predetermined position of the information recording medium based on the first synchronization signal; (b) determining whether the recording operation in step (a) is normally terminated or not; and (c) when the recording operation in step (a) is not normally terminated, performing a recording operation for recording the management information at the predetermined position of the information recording medium based on the second synchronization signal. | 08-21-2008 |
| 20080205221 | 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 and identifying a predetermined detection pattern in a reproduction signal, a step of detecting a signal state of the reproduction signal associated with the predetermined detection pattern, and a first calculation step for calculating a first evaluation index value based on the detected signal state and a reference state identified from the predetermined detection pattern. When there is a plurality of predetermined detection patterns as described above, a second calculation step is further provided for calculating a second recording state evaluation index value using the first evaluation index value calculated from each of the predetermined detection patterns. Data recording can be properly evaluated using the first and second recording state evaluation index values. | 08-28-2008 |
| 20080205222 | Read-only recording medium and reproducing method thereof - A reproducing method and apparatus are discussed. According to an embodiment, the method includes checking whether or not a current position is a linking data area based on an identifier to identify the linking data area, the linking data area preceded and followed by a real data area and removing invalid data in the linking data area and outputting continuously the real data in the real data area before and behind the linking data area, when the identifier is detected. | 08-28-2008 |
| 20080232212 | Method of Dynamically Updating Media Play Effects Utilized on a Digital Photo Slide Show - Before playing a digital photo slide show, both required digital photos and a guiding program are burnt on an optical disc in advance. While the disc is loaded into an optical disc play device, the guiding program triggers the optical disc play device to connect with an external network for updating media play effect packages, which are related to the digital photos, and for storing the updated media play effect packages in a preserved database of said optical disc play device. Then a corresponding digital photo slide show is dynamically generated and played according to both the updated media play effect packages, which are stored in the preserved database, and the digital photos burnt on the optical disc. | 09-25-2008 |
| 20080247286 | Apparatus and method for producing optical recording medium, optical recording medium, apparatus and method for reproduction and apparatus and method for recording - An optical recording medium having a plural number of recording layers includes a n-th recording layer ( | 10-09-2008 |
| 20080267028 | INFORMATION RECORDING APPARATUS, INFORMATION RECORDING METHOD, INFORMATION PLAYBACK APPARATUS, AND INFORMATION PLAYBACK METHOD - According to one embodiment, an information recording apparatus which records content compliant with a second DVD standard on an information storage medium, the second DVD standard being a DVD standard later than a first DVD standard defined for a first image quality and being defined for a second image quality higher than the first image quality, includes a determination unit configured to determine whether narrow burst cutting area (NBCA) of the information storage medium is valid or not, and whether supported maximum recording speed of the information storage medium is triple speed or more of a predetermined recording speed, and a recording unit configured to perform real-time recording of the content compliant with the second standard on the information storage medium on the basis of the determination. | 10-30-2008 |
| 20080279067 | Optical Record Carrier Comprising An Indiction Area for Indicating Whether A Recordable Area Is Fully Recorded, And Devices For Use With Such Record Carrier - The inventions relates to an optical record carrier ( | 11-13-2008 |
| 20080279068 | Method of inspecting disc information - A method of inspecting disc information stored on an optical disc, for applying in an optical drive of a computer system. The method of inspecting disc information comprises a. outputting a standard command, for reading the disc structure of the disc; b. determining whether the reading was successful, if not, step c is performed; if yes, step d is performed; c. outputting a force read command, for reading the disc structure; d. receiving the disc structure; and e. outputting the corresponding disc information according to the disc structure. The invention can inspect various disc information of the optical disc, and the user database can be manually updated and expanded according to a user's will, thereby increasing the convenience of inspecting optical discs. | 11-13-2008 |
| 20080304381 | Method and Apparatus for Detecting Cracks in an Optical Record Carrier - The present invention relates to a reading apparatus and to a corresponding reading method for reading data from, and detecting cracks in, an optical record carrier ( | 12-11-2008 |
| 20080310271 | RECORDING AND/OR REPRODUCING APPARATUS AND CONTROL METHOD THEREOF - A recording and/or reproducing apparatus outputs a loading time of a recording medium through a display to inform a user of the loading time, and a control method thereof. The recording and/or reproducing apparatus includes a calculation unit to calculate loading time of a recording medium when the recording medium is inserted into the recording and/or reproducing apparatus, and an output unit to output the calculated loading time to a display. | 12-18-2008 |
| 20080316883 | RECORDING MEDIUM DETECTION DEVICE - A device enabling simple detection of a recording medium placed on a tray includes at least two electrodes arranged on the tray, an electric field sensor connected to the electrodes, and a control circuit connected to the electric field sensor. The electric field sensor detects capacitance in accordance with the distance between the electrodes relative to the recording medium placed on the tray. The control circuit determines the recording media type of the recording medium based on the capacitance detected by the electric field sensor. | 12-25-2008 |
| 20090003163 | OPTICAL DISK DRIVE FOR WRITING A RE-WRITABLE OPTICAL DISK AND METHOD THEREOF - An optical disk drive of recording a re-writable optical disk and the method thereof. First, an optimum power is determined. A gain of a SBAD (Sub Beam Adder) signal is adjusted for generating an calibrated SBAD signal such that the calibrated SBAD signal maintains at the same level during a write power phase and a read power phase substantially. Then, the re-writable optical disk is recorded by using the optimum power. Next, a defect of the re-writable optical disk is detected according to the calibrated SBAD signal. Then, the optical disk drive will jump over the defect and prevent it from being data-recorded so as to avoid system malfunction. | 01-01-2009 |
| 20090010121 | INFORMATION PROCESSING DEVICE, ACCESS DEVICE, RECORDING MEDIUM, INFORMATION PROCESSING METHOD, AND INFORMATION PROCESSING PROGRAM - An information processing device ( | 01-08-2009 |
| 20090028019 | RECORDING MEDIUM ACCESS DEVICE - An information reproduction device according to the present invention is a device for accessing a recording medium having first address information and second address information recorded thereon. The first address information is represented by a shape formed on the recording medium in advance; and the second address information is recorded on the recording medium together with data. The information reproduction device includes a head section for accessing the recording medium to generate a reproduction signal; a first detection section for detecting the first address information from the reproduction signal; a second detection section for detecting the second address information from the reproduction signal; and a control section for, based on a detection result of either the first detection section or the second detection section which detected the address information first, controlling an access after the detection to the recording medium. | 01-29-2009 |
| 20090046551 | INFORMATION REPRODUCTION DEVICE - An information reproducing apparatus ( | 02-19-2009 |
| 20090073835 | Recording Parameter Setting Device, Program Thereof, Computer-Readable Recording Medium Containing the Program, Information Recording Medium, Recording/Reproducing Device, and Recording Parameter Setting Method - A recording parameter setting device includes a trial recording parameter setting section ( | 03-19-2009 |
| 20090092017 | OPTICAL DISK DEVICE - This optical disk device includes an examination means which examines a first physical characteristic of an optical disk, and a servo means which starts servo control based upon that first physical characteristic. This optical disk device includes a read means which incorporates the examination means, and which reads type information from the optical disk under that servo control based upon the first physical characteristic. This optical disk device includes a control means which decides whether or not a second physical characteristic of the optical disk, which is determined as a standard for the type of type information read, and the first physical characteristic, agree with one another. And, if the control means has decided that these two physical characteristics do not agree with one another, it commands the read means to read replay data from the optical disk, under that servo control based upon the first physical characteristic. | 04-09-2009 |
| 20090097370 | METHOD AND APPARATUS FOR DETECTING LAND PRE-PITS - Aspects of the disclosure provide a method for detecting land pre-pits. The method can adaptively adjust a threshold for detecting the land pre-pits in order to improve the correctness of detecting. The method for detecting land pre-pits can include extracting a land pre-pit data stream from a reading signal based on a land pre-pit threshold, the reading signal corresponding to land pre-pits of an optical medium, comparing the land pre-pit data stream with format information of the optical medium to obtain an error signal, and adjusting the land pre-pit threshold based on the error signal. | 04-16-2009 |
| 20090103408 | Kind Identifying Apparatus, Kind Identifying Method, and Identifying Program - There is provided a type judgment device capable of rapidly and safely identifying the type of an optical disc while preventing unexpected information recording or information erase. An optical beam as parallel light is applied in a circular polarized state to an optical disc having recording tracks and the polarization characteristic in the reflected light is detected. According to the detected polarization characteristic, the type of the disc is judged in accordance with the interval of the adjacent recording tracks. | 04-23-2009 |
| 20090122675 | Method for determining optimal operating parameters for reading or writing a storage medium - A method for determining optimal operating parameters for reading or writing a storage medium, with the consideration of failed experiment. In an embodiment of the invention, if one of a set of experiments, executed within pre-defined ranges with respect to two parameters, leads to an invalid characteristic measurement value, and the corresponding values of the two parameters occur substantially at ends of the respective ranges, at least one search operation is determined according to the failed experiment(s) and a new set of experiments is generated according to the previous set of experiments and the search operation to avoid the failed experiment(s). The new set of experiments can result in more reliable optimal operating parameters. | 05-14-2009 |
| 20090129226 | WRITE-ONCE OPTICAL DISC, AND METHOD AND APPARATUS FOR RECORDING/PLAYBACK MANAGEMENT INFORMATION ON/FROM OPTICAL DISC - An apparatus and method for recording and reproducing data are discussed. According to an embodiment, the present invention provides an apparatus for recording management information on a writable recording medium, the recording medium including one or more temporary management areas being used in a designated order for storing therein temporary management information until the recording medium is closed and a final management area for storing therein final management information when the recording medium is to be closed, the apparatus comprising a pickup adapted for recording data on the recording medium and a microcomputer configured to control the pickup to record data onto a first indicator when closing the recording medium so as to indicate that the recording medium is closed, the first indicator located at the most front position of a first temporary management area being used first among the one or more temporary management areas. | 05-21-2009 |
| 20090147641 | Optical disc recording and reproducing apparatus - An optical disc recording and reproducing apparatus for recording and reproducing data in and from an optical disc by the use of the optical disc as a recording medium, comprises analog processing means including a binarization unit for subjecting a signal read from the optical disc to binarization and a servo unit for controlling recording and reproducing a signal in and from the optical disc; synchronous clock generating means for generating a synchronous clock signal which is synchronized with the signal read from the optical disc; address detecting means for detecting address information indicating a physical position on the optical disc based on the signal read from the optical disc, and outputting a signal indicating the address information and a signal indicating that the address has been detected when the address information has been detected; a sector counter for holding a sector count value of a sector as a recording unit on the optical disc, and updating the sector count value according to the synchronous clock signal and the signal output from the address detecting means; and gate signal generation switching means for generating gate a signal which controls the analog processing means, based on one of the sector count value held in the sector counter and information obtained from the analog processing means, according to the signal indicating that the address has been detected, which is output from the address detecting means. | 06-11-2009 |
| 20090161511 | Optical disc discriminating method and optical disc apparatus - A detection signal is asserted when a surface of an optical disc or an information recording layer is detected. An asserting (masking) time interval of the detection signal is set such that the number of times of asserting the detection signal becomes at most two times when a focal position of the objective lens passes at least the surface of the optical disc. After the objective lens is moved for a prescribed section in a direction along which the objective lens comes closer to the optical disc, a kind of the optical disc is discriminated based on a time interval T | 06-25-2009 |
| 20090168623 | METHOD AND APPARATUS OF DETERMINING A RECORDING CONDITION FOR OPTICAL DISC - An optical disc writing condition determining method according to the present invention includes the steps of: performing a first test write operation at a low speed on an inner test track; setting condition A for performing a write operation at the low speed on the inner test track based on a result of the first test write operation; performing a second test write operation at the low speed on an outer test track; setting condition B for performing a write operation at the low speed on the outer test track based on a result of the second test write operation; performing a third test write operation at a high speed on the outer test track; setting condition C for performing a write operation at the high speed on the outer test track based on a result of the third test write operation; and calculating either a difference between the conditions A and B or a ratio of the condition B to the condition A and modifying the condition C based on the difference or the ratio, thereby determining writing condition D for performing a write operation at the high speed on user data tracks. | 07-02-2009 |
| 20090231974 | OPTICAL DISC DRIVE AND METHOD OF CONTROLLING THE SAME - A method of controlling an optical disc drive in which determining an organic optical disc using a tracking control polarity (in-groove polarity) of the organic optical disc and a reflection amount characteristic (low to high characteristic) after recording and improving the determination speed of the optical disc is possible. The method of controlling an optical disc drive includes detecting a first average value and a second average value of a differential phase detection tracking error (DPD TE) signal of a loaded optical disc, and determining the type of the loaded optical disc by comparison between the first average value and the second average value of the DPD TE signal. | 09-17-2009 |
| 20090245052 | OPTICAL RECORDING METHOD, OPTICAL RECORDING APPARATUS, OPTICAL RECORDING MEDIUM, AND OPTICAL RECORDING AND REPRODUCING METHOD - The present invention aims to provide an excellent optical recording method, an optical recording apparatus, and an optical recording medium that provide higher efficiency of recording and reproducing and are uninfluenced by the mismatch of optical axes of plural laser lights induced from accident errors of optical recording and optical reproducing apparatuses when carrying out recording or reproducing or control of focus or tracking by use of a laser light, and layer construction of the recording medium itself is simple. | 10-01-2009 |
| 20090245053 | RECORDING MEDIUM, DATA RECORDING APPARATUS, DATA REPRODUCING APPARATUS AND DATA RECORDING METHOD - Provided is a new-type recordable DVD medium characterized in having medium characteristics not defined in the DVD-R standards and-having compatibility with the DVD-ROM standards. Since information on the new-type recordable DVD medium can be played back by an existing player, even when content data protected by CSS (Content Scrambling System) is recorded on the new-type recordable DVD medium, the recordable DVD medium can be used for content distribution service using a kiosk terminal. | 10-01-2009 |
| 20090296547 | Information Recording Apparatus and Information Recording Program - The present invention provides an information recording apparatus capable of reproducing recorded recording information without giving strange feeling even in the case where it is necessary to switch a recording layer among multiple recording layers, and an information recording program for executing the information recording process. | 12-03-2009 |
| 20090310454 | DIMPLE POSITION DETECTION DEVICE AND DIMPLE POSITION DETECTION METHOD FOR DISK DRIVE SUSPENSION - A dimple position detection device for detecting a position of a dimple formed on a load beam is provided with an illumination device, imaging device, and image processing section. The illumination device directs illumination light toward the dimple. The imaging device receives reflected light from the dimple. The image processing section binarizes an image obtained by the imaging device. The image processing section maximizes a binarization level, binarizes the reflected light image, determines whether an area of a light spot region or on-region above the binarization level has a predetermined value, reduces the binarization level when the area of the light spot region is less than the predetermined value, and calculates the gravitational position of the light spot region with the predetermined value reached by the light spot region area. | 12-17-2009 |
| 20090316547 | OPTICAL DISCS FOR MEASURING ANALYTES - This invention directs to an optical disc assembly configured to receive an analyte which can be detected by a standard optical disc reader or an optical disc reader modified therefrom. The optical disc assembly may preferably be designed so that the optical disc reader can track the disc and detect the analyte concurrently and discriminably. The optical disc assembly contains or encodes optically readable features which are trackable by the optical disc reader and which have encoded speed information enabling the optical disc reader to rotate the optical disc assembly at a determinable speed. The optical disc assembly also includes an analyte section capable of receiving the analyte that can be detected by the optical disc reader. | 12-24-2009 |
| 20100002554 | OPTICAL DISK DEVICE AND OPTICAL DISK TYPE DETERMINATION METHOD - An optical disk device includes an optical head unit, a drive means and a recording surface state determination means, and determines the type of an optical disk based on a state of the information recording surface. The information recording surface includes a management region on which management information is recorded and formed by a guiding groove or a prepit sequence and a data recording region on which a user data is recorded and on which a track formed by a guiding groove or a prepit sequence. The optical head unit irradiates a focused beam onto the information recording surface of an optical disk which rotates. The drive means drives to move the focused beam along a radial direction of the optical disk by driving the optical head unit. The recording surface state determination means determines a state of the information recording surface based on a reflected light of the focused beam. The optical disk device determines the type of the optical disk based on a state of the information recording surface in a determination region being set to straddle between a management region and the data recording region. | 01-07-2010 |
| 20100002555 | CONTROL SIGNAL FOR THREE DIMENSIONAL OPTICAL DATA STORAGE - A method is presented for use in determining a degree of quality of a multi-layer optical data carrier in its at least partially recorded state. Predetermined first data is provided being indicative of a qualified, at least partially recorded multi-layer optical data carrier. This data corresponds to an optical response obtainable from a specific data carrier under predetermined conditions of an optical scan of the rotating data carrier. A data carrier being qualified is scanned by at least one optical beam under said predetermined conditions of the scan, and a first control signal from the data carrier is detected and data indicative of the detected control signal is generated. The so generated data is processed to determine a relation with said predetermined data. The determined relation is used for determining a degree of quality of said scanned data carrier. | 01-07-2010 |
| 20100008200 | OPTICAL DISC APPARATUS AND SIGNAL RECORDING SURFACE DETECTING METHOD - An optical disc apparatus includes: an objective lens that condenses a first light beam, which is emitted from a light source and corresponds to a first optical disc, and that illuminates the first light beam to an unknown disc whose type is unknown; a driving section that drives the objective lens in a focus direction approaching or becoming distant from the unknown disc; a rotation section that rotates the unknown disc; a signal processing section that generates a first reproduction signal indicating a total amount of a first returning light beam generated by reflection of the first light beam from the unknown disc; and a detecting section that detects a first signal recording surface, which corresponds to the first optical disc, from the unknown disc on the basis of the first reproduction signal. | 01-14-2010 |
| 20100020659 | METHOD AND APPARATUS FOR PREVENTING DATA REPRODUCIBILITY - Provided are a method and an apparatus to prevent reproducibility of data with respect to an optical information storage medium. The method includes recording patterns with respect to the optical information storage medium using irradiated light so as prevent reproduction of the data. The patterns may cause an error or a malfunction when attempting to access the data of the optical information storage medium so as to prevent the reproduction of the data. | 01-28-2010 |
| 20100020660 | INFORMATION RECORDING APPARATUS AND METHOD, COMPUTER PROGRAM, AND RECORDING MEDIUM - An information recording apparatus ( | 01-28-2010 |
| 20100027393 | OPTICAL RECORDING MEDIUM, OPTICAL RECORDING APPARATUS, AND SYSTEM TO PREPARE CONTENTS-RECORDED OPTICAL RECORDING MEDIUM - An optical recording medium, comprising a dye recording layer, wherein a recording mark portion is formed at the dye recording layer by use of a laser light having a wavelength of 640 nm to 680 nm, and a reflectance after recording with respect to the laser light at the recording mark portion is increased compared to a reflectance before recording. | 02-04-2010 |
| 20100027394 | SERVO CALIBRATION MARK DETECTION CIRCUIT FOR HD-DVD OR DVD-RAM AND METHOD THEREOF - The invention provides a servo calibration mark detection circuit for use in an optical disk drive. In one embodiment, the servo calibration mark detection circuit comprises a summing processor, a slicing level generator, and a comparator. The summing processor sums an intensity of a light beam reflected from both an inner groove and an outer groove to obtain a first signal. The slicing level generator generates a slicing level. The comparator then compares the first signal with the slicing level to obtain a second signal, wherein the second signal indicates a first location of a first servo calibration mark recorded on the inner groove and a second location of a second servo calibration mark recorded on the outer groove. | 02-04-2010 |
| 20100034067 | INFORMATION RECORDING METHOD AND INFORMATION RECORDING APPARATUS - Information is recorded on a multi-layered optical recording medium by irradiating it with a laser beam. The recording medium can form a first information recording layer that is the farthest from a light incident surface, a second information recording layer that is the second farthest from the light incident surface, and at least one third information recording layer that is located closer to the light incident surface than the second information recording layer is. At this time, if all the information recording layers other than the first information recording layer are either blank or have been completely recorded, then information is recorded on the first information recording layer. This allows for stabilizing the energy of a recording laser beam during recording and thereby providing improved recording quality. | 02-11-2010 |
| 20100039911 | INFORMATION RECORDING METHOD AND INFORMATION RECORDING APPARATUS - A recording method for irradiating a multi-layered optical recording medium with a laser beam to record information thereon. The optical recording medium can form a first information recording layer that is the farthest from a light incident surface, a second information recording layer that is the second farthest from the light incident surface, and at least one third information recording layer that is located closer to the light incident surface than the second information recording layer is. The method is to record information on the second information recording layer when all the information recording layers other than the second information recording layer are either blank or have been completely recorded. This allows for realizing high-quality information recording in consideration of adherence of foreign matters or occurrence of scratches. | 02-18-2010 |
| 20100067338 | Method of Determining the Quality of Data on an Optical Disc - The invention relates to a method of determining the quality of data on an optical disc. The method comprises performing a quality scan resulting in quality information about at least part of the data on the optical disc; organizing the quality information in groups, each group comprising quality information corresponding to a predetermined zone on the optical disc; and computing a zone quality information parameter for each group based on the quality information corresponding to that group. | 03-18-2010 |
| 20100091625 | TEST DEVICE FOR CHARACTERIZING MATERIALS USED FOR OPTICAL STORAGE - The subject matter is a test device for characterizing a material used in an optical storage medium ( | 04-15-2010 |
| 20100091626 | OPTICAL DISK INSPECTING APPARATUS AND METHOD - An optical disk inspecting apparatus | 04-15-2010 |
| 20100097905 | INFORMATION PROCESSING DEVICE, INFORMATION RECORDING MEDIUM, INFORMATION PROCESSING METHOD AND COMPUTER PROGRAM - Provided are a device and a method for identifying whether or not an information recording medium is a pre-formatted disc, and an information recording medium as a pre-formatted disc. In an information processing device that executes recording of data onto a disc, such as a video camera, a process of identifying which one of the following discs a loaded disc is, that is, whether the loaded disc is (a) an unrecorded blank disc, (b) a pre-formatted disc to which a padding process has been applied, or (c) an already-recorded disc, is executed as a process of recognizing the loaded disc. With this configuration, a padding process that needs to be executed during a formatting process or finalizing process in conventional devices becomes unnecessary, thus enabling quick processing without making the user wait during the start of recording or finalizing process. | 04-22-2010 |
| 20100097906 | OPTICAL DISC APPARATUS - An optical disc apparatus according to the present invention includes a disc type recognizing section | 04-22-2010 |
| 20100110851 | MULTILAYER-OPTICAL-DISC DATA-ERASURE METHOD AND OPTICAL DISC APPARATUS - An optical-disc testing apparatus performs test erasures on the test areas T of data layers of an optical disc while changing the power level Pe of data erasure laser light and the defocus amount if of the data erasure laser light from a target data layer. The optical-disc testing apparatus determines an optimal erasure condition that enables a simultaneous data erasure from the greatest number of data layers and an optimal erasure sequence that enables data erasure from all of the data layers with the fewest number of times. The determined optimal erasure condition and sequence are registered on the memory of an optical disc apparatus. The optical disc apparatus reads the registered optimal erasure condition and sequence of the optical disc from its memory and erases data from each of the data layers of the optical disc based on the read optimal erasure condition and sequence. | 05-06-2010 |
| 20100110852 | Information recording medium, and method and apparatus for recording a signal thereon - A disc-shaped information recording medium includes a laminate of recording layers on and from which an information signal can be optically recorded and reproduced from one side of the medium. Data areas are provided in the recording layers, respectively. The information signal can be recorded on and reproduced from the data areas while a laser beam emitted from an optical pickup is applied to the data areas. Optical recording test areas are provided in the recording layers, respectively. A test signal can be recorded on and reproduced from the optical recording test areas to decide optimum power values of the laser beam for signal recording. The test areas are out of overlap as viewed in a direction of propagation of the laser beam. | 05-06-2010 |
| 20100135137 | 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 response to a radio frequency signal. The sync pattern detector counts the BCA signal according to a reference clock, detects a sync pattern of the BCA signal and outputs a channel bit length counting value. The channel clock recovery device generates a channel clock according to the reference clock and the channel bit length counting value. The data demodulator transfers the BCA signal into a BCA data according to the channel clock. The sync pattern detector continuously counts the B CA signal and continuously outputs a plurality of counting values, so that the sync pattern of the BCA signal can be determined according to at least three sequential counting values. | 06-03-2010 |
| 20100142345 | DVD Identification - The described implementations relate to DVD identification. One method accesses media content from a DVD and identifies a format of the media content. The method also determines a unique identification for the media content based upon the format. | 06-10-2010 |
| 20100142346 | INFORMATION RECORDING MEDIUM, RECORDING METHOD AND REPRODUCTION METHOD - On a recording medium, data is recorded on at least one of a plurality of recording layers by laser light incident on a surface of the recording medium. The plurality of recording layers include a first recording layer, and second through N-th recording layers (N is an integer of 3 or greater) which are sequentially located in a direction from the first recording layer toward the surface on which the laser is incident. The plurality of recording layers each have a first calibration area and a second calibration area located outer to the first calibration area. The first calibration area located in each of the first through N-th recording layers is located at a different radial position from a radial position of the first calibration area in each of the other recording layers; and the second calibration area located in each of the first through N-th recording layers is located at the same radial position as a radial position of the second calibration area in each of the other recording layers. | 06-10-2010 |
| 20100142347 | DEVICE FOR MEASURING LENS ECCENTRICITY - A device for measuring eccentricity of a lens includes a support portion, an eccentricity detector, a driving device, a vacuum absorption device, a clamping device, and a rotatable pole. The support portion includes a plurality of gear teeth and a first through hole. The eccentricity detector is positioned above the lens. The driving device includes a driving mechanism and a motor. The motor rotates the driving mechanism. The vacuum absorption device includes an air pipe and a vacuum generation element. The vacuum generation element is for removing air from the air pipe. The clamping device includes a first clamping element and a second clamping element. The first clamping element cooperates with the second clamping element to locate and fix the lens. The rotatable pole includes a second through hole. The rotatable pole is for supporting the support portion. | 06-10-2010 |
| 20100157760 | OPTICAL STORAGE MEDIUM WITH LIMITED ACCESS - The present invention relates to an optical storage medium ( | 06-24-2010 |
| 20100157761 | Optical Disk Drive and Method for Use with an Optical Disk Drive for Determining the Disk Characteristic - An optical disk drive for determining a disk characteristic of an optical disk comprising an information layer comprising a substantially circular track is described. The optical disk drive has an optical pickup unit arranged to generate a beam, direct the beam to the optical disk for forming an incident beam, sense a reflected beam produced by the optical disk with a sensor upon receiving the incident beam with the sensor, produce a sensor output signal from sensing the reflected beam; a disk receiving device arranged to receive the optical disk; a motor arranged to provide a transition of the disk receiving device from a first mode to a second mode in at least one transition phase; and a controller arranged to receive the sensor output signal during at least one part of the at least one transition phase and perform at least part of determining the disk characteristic from at least the sensor output signal received during the at least one part of the at least one transition phase. The transition phase can be associated with moving the optical disk into the optical disk drive with a disk load motor. The transition phase can be associated with changing a rotational speed of the optical disk with a spindle motor. Determining the disk characteristic can include a disk recognition preparation. | 06-24-2010 |
| 20100172226 | INFORMATION RECORDING MEDIUM, REPRODUCTION APPARATUS AND RECORDING APPARATUS - An information recording medium according to the present invention includes three or more information recording layers. Each of the plurality of information recording layers includes a test recording area usable for adjusting a recording condition. One of the plurality of information recording layers includes a reproduction-only management data area in which management data usable for managing the information recording medium is pre-recorded. Each of the other two or more information recording layers among the plurality of information recording layers includes a test recording area at a radial position partially overlapping the radial position of the management data area. | 07-08-2010 |
| 20100182884 | Detecting mechanism of disc pick-and-place device - A detecting mechanism of a disc pick-and-place device comprises a first frame and a pick-and-place head, a detecting portion and a sensor respectively coupled thereto. When the pick-and-place picks up at least two stacked discs, the detecting portion then shows a state different from when the pick-and-place head picks up one disc, and when the sensor senses that the detecting portion shows the different state, it may then output a corresponding signal thereby allowing the disc pick-and-place device to detect whether at least two discs are picked up and be prevented from placing at least two discs into a disc copier to avoid the incapability of copying and the speed decreasing of copying and even the damage of the copier. | 07-22-2010 |
| 20100188947 | Automatic DTS CD Versus CD-DA Detection Within a File System-Based Device - A method of detection is described to be used in file system-based player devices to determine the type of compact disk that has been inserted into a player. The method automatically distinguishes between the DTS-CD format and standard audio CDs. The method allows the operating system or CPU software to take appropriate action to decode and playback the audio stream once the a decision between standard audio CD or DTS-CD is made. | 07-29-2010 |
| 20100188948 | Recording parameter setting device, program thereof, computer-readable recording medium containing the program, information recording medium, recording/reproducing device, and recording parameter setting method - A recording parameter setting device includes a trial recording parameter setting section ( | 07-29-2010 |
| 20100188949 | Recording parameter setting device, program thereof, computer-readable recording medium containing the program, information recording medium, recording/reproducing device, and recording parameter setting method - A recording parameter setting device includes a trial recording parameter setting section ( | 07-29-2010 |
| 20100188950 | INFORMATION RECORDING APPARATUS AND METHOD - A disc-shaped information recording medium includes a first recording layer (L0 layer) having (I) a first trial write area ( | 07-29-2010 |
| 20100202263 | METHOD FOR JUDGING OPTICAL DISC, OPTICAL DISC DEVICE AND PROGRAM - Provided is a method for easily judging that a disc is an optical disc that conforms to the DVD Download standards, without generating malfunction. A Wobble signal is detected in a data zone ( | 08-12-2010 |
| 20100214892 | OPTICAL RECORDING DEVICE AND METHOD OF OPERATING AN OPTICAL RECORDING DEVICE - The position of a write spot on an optical record carrier, during a write operation by an optical recording device, is important for the quality of the data recorded. Radial positioning of the spot may be facilitated by means of tracking spots, signals from which identify the location of the write spot. Signals from the tracking spots may be affected by the characteristics of the optical record carrier in the their vicinity. Specifically, effects arise from the recorded or unrecorded nature of the tracks adjacent each spot. The invention comprises rotation of the means to generate tracking spots such that tracking spots may be placed in an optimum position for recording, regardless of which data layer on an optical record carrier is to be recorded or the recording direction. | 08-26-2010 |
| 20100226226 | OPTICAL DISK, OPTICAL DISK DEVICE, OPTICAL DISK DEFECT REGISTERING METHOD, OPTICAL DISK RECORDING METHOD, AND OPTICAL DISK REPRODUCING METHOD - An optical disc | 09-09-2010 |
| 20100232273 | OPTICAL DISC DEVICE - The optical disc apparatus of this invention includes: an optical pickup | 09-16-2010 |
| 20100232274 | METHOD AND APPARATUS FOR DETECTING DISC - A method for detecting a disc, the method includes the steps of: reading a file system of the disc; determining a type of the disc according to the file system; and abandoning a multi-session checking process upon the disc if the type of the disc is a one-session disc. | 09-16-2010 |
| 20100246351 | INFORMATION PROCESSING APPARATUS AND FAULT SYMPTOM DETERMINATION METHOD - According to one embodiment, an information processing apparatus includes an optical disc drive, a measuring module in the optical disc drive, and a measurement value reception module. The measuring module is configured to measure a value related to an operation of a predetermined motor in the optical disc drive, which is executed during a time period of power-up of the optical disc drive. The measurement value reception module is configured to receive a measurement value related to the operation of the predetermined motor from the optical disc drive in response to an event of being requested to turn off the power of the optical disc drive, and to store the received measurement value in a storage device. | 09-30-2010 |
| 20100246352 | OPTICAL INFORMATION RECORDING MEDIUM, REPRODUCING DEVICE FOR OPTICAL INFORMATION RECORDING MEDIUM, CONTROL METHOD AND CONTROL PROGRAM FOR THE REPRODUCING DEVICE, AND MEDIUM WITH THE CONTROL PROGRAM RECORDED THEREIN - A super-resolution medium ( | 09-30-2010 |
| 20100246353 | OPTICAL INFORMATION RECORDING MEDIUM, REPRODUCING DEVICE FOR OPTICAL INFORMATION RECORDING MEDIUM, CONTROL METHOD AND CONTROL PROGRAM FOR THE REPRODUCING DEVICE, AND MEDIUM WITH THE CONTROL PROGRAM RECORDED THEREIN - A super-resolution medium ( | 09-30-2010 |
| 20100271917 | TEST-WRITE METHOD, INFORMATION RECORDING METHOD, AND INFORMATION RECORDING APPARATUS - A test-write method for accurately and quickly determining recording conditions, and an apparatus suitable therefor. In a 2T-based strategy, recording pulse conditions are determined by separately test-writing an even-number length mark and an odd-number length mark, and then the relative positions of the even-number length mark and the odd-number length mark at the recording pulse start time are adjusted. | 10-28-2010 |
| 20100296377 | METHOD OF EVALUATING CHARACTERISTICS OF MULTILAYER OPTICAL RECORDING MEDIUM - A multilayer optical recording medium having three or more information recording layers is irradiated with a laser beam, and a first signal obtained from the reflected laser beam is subjected to a frequency filter. A second signal obtained by filtration through a high-pass filter is used to evaluate the characteristics of the multilayer optical recording medium. In this manner, even in a multilayer optical recording medium having three or more information recording layers, the influence of the variation of the thickness and material of the information recording layers and the influence of the variation of the thickness of a spacer layer can be clearly determined and evaluated. | 11-25-2010 |
| 20100309764 | MULTILAYERED OPTICAL DISK AND ITS RECORDING METHOD - To provide a recording method of a multilayered optical disk having three or more recording layers, for performing recording while securing sufficient test areas without reducing user data areas, and while suitably controlling the power of laser beam irradiated onto each of the layers. The method uses an optical disk which has at least a first recording layer and a second recording layer located on the side nearer to the light incident surface than the first recording layer, and which respectively has a first test area configured by a plurality of segments in the first recording layer and a second test area configured by a plurality of segments in the second recording layer. Further, the method is configured such that there is defined beforehand a predetermined radial distance L corresponding to relative precision of radial positions between the plurality of layers and the optical spot diameter, and that when an arbitrary segment in the second test area is test-recorded, a segment in the first test area, the radial distance of which from the recorded test area in the second test area is within the range of the predetermined radial distance L, is set as a segment in which the test recording is not performed. Thereby, even in the case where the radial positions of the test areas of the plurality of layers are substantially overlapped with each other, it is possible to precisely perform the learning of optical power. For this reason, it is possible to use and arrange the test areas of the plurality of layers without waste. Further, the learning of recording power can be performed without receiving the influence of the recorded state of the other layers, so that the accuracy of the learning of recording power can be improved. Thereby, it is possible to improve the quality of recording and the reliability of recorded data. | 12-09-2010 |
| 20100315924 | Over Current Protection Device - An over current protection device is described. It includes a plurality of input channels for receiving an input signal; a plurality of low pass filters coupled to a first group of the plurality of input channels, wherein each low pass filter is associated with one input channel within the first group of input channels, the plurality of low pass filters operative for removing spikes in associated with the input signal; and a plurality of digital to analog converters coupled to a second group of the plurality of input channels, wherein each digital to analog converter is associated with one low pass filter in the second group of input channels, the digital to analog converters operative for triggering over current protection when a signal received from the associated low pass filter is beyond a preset level, wherein the over current protection device is on chip with the laser diode driver. | 12-16-2010 |
| 20100315925 | METHOD FOR DISCRIMINATING DISC - A disc discriminating method for use in an optical disc drive includes the following steps. Firstly, an optical pickup head of the optical disc drive is controlled to move in a first direction when the optical pickup head is in a track-unlocked state. Then, a tracking error signal and a radio frequency signal are generated. According to the tracking error signal, a tracking error zero crossing signal is obtained. According to the radio frequency signal, a radio frequency zero crossing signal is obtained. According to a phase relation between the tracking error zero crossing signal and the radio frequency zero crossing signal, the disc is discriminated as an on-groove recording disc or an in-groove recording disc. | 12-16-2010 |
| 20110007617 | RECORDING/REPRODUCING DEVICE AND LASER DRIVING PULSE ADJUSTING METHOD - A recording/reproducing device includes an optical head unit which performs writing and reading of information expressed by marks and spaces on an optical recording medium by irradiating laser light onto the optical recording medium, a laser driving pulse generating unit that generates a laser driving pulse according to the recorded information to supply a laser driving signal to the optical head unit, and executes the irradiation of the laser light onto the optical head unit for recording, an evaluation value calculating unit that calculates a quality evaluation value, which is an index of recording signal quality based on a signal read from the optical recording medium by the optical head unit, and an adjustment controlling unit that performs an adjustment setting of the laser driving pulse generated in the laser driving pulse generating unit. | 01-13-2011 |
| 20110069593 | METHOD OF IDENTIFYING PHYSICAL CHARACTERISTIC INFORMATION OF OPTICAL DISC AND RELATED CONTROLLER THEREOF - A method of identifying physical characteristic information of an optical disc includes: deriving a reading result by reading at least a first region of the optical disc, where a location of the first region is specified in a Blu-ray disc specification for recording information associated with recording management of a BD recordable disc; and identifying a first physical characteristic of the optical disc according to the reading result. | 03-24-2011 |
| 20110080819 | SYSTEMS AND METHODS FOR RELIABILITY TESTING OF OPTICAL MEDIA USING SIMULTANEOUS HEAT, HUMIDITY, AND LIGHT - Methods and systems for the rapid evaluation of optical media reliability are disclosed. Simultaneous exposure of optical media to heat, humidity, and light has been found to be an effective test to differentiate more stable media from less stable media in a reasonable amount of time. | 04-07-2011 |
| 20110141868 | DATA STORAGE SYSTEM AND METHOD FOR CALIBRATING SAME - Disclosed herein are aspects of optical tape technology, tape manufacturing, and tape usage. Methods and systems of tape technology disclose optical tape media including: configurations, formulations, markings, and structure; optical tape manufacturing methods, systems, and apparatus methods and systems including: curing processes, coating methods, embossing, drums, testing, tracking alignment stamper strip; optical tape methods and systems including: pick up head adapted for the disclosed optical tape; and optical tape uses including optical storage media devices for multimedia applications | 06-16-2011 |
| 20110170389 | OPTICAL INFORMATION MEDIUM MEASUREMENT METHOD, OPTICAL INFORMATION METHOD, OPTICAL INFORMATION MEDIUM, RECORDING APPARATUS, AND REPRODUCING APPARATUS - An optical information medium measurement method of the present invention, for measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers, includes a first step of measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, a second step of obtaining a thickness between layers of the optical information medium, a third step of obtaining a reflectance of each layer of the optical information medium, and a fourth step of converting the modulation degree of each layer, the modulation degree being measured in the first step, into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the thickness between layers, the thickness being obtained in the second step, and a value indicative of the reflectance of each layer, the reflectance being obtained in the third step. | 07-14-2011 |
| 20110170390 | DIGITAL BROADCAST RECEIVER - Provided is a digital broadcast receiver capable of displaying a message, a list of titles of contents or the like together with a viewing screen without interrupting viewing of contents. The digital broadcast receiver includes a controller | 07-14-2011 |
| 20110211434 | METHOD OF RECOGNIZING TRACK PITCH OF OPTICAL DISK - A method of recognizing a track pitch of an optical disk, adapted for an optical disk player, is provided. The method includes the steps of driving an optical pickup head to a predetermined position, so that the optical pickup head and the spindle motor are a predetermined distance apart, reading a data sector address, and recognizing the magnitude of the track pitch of the optical disk according to the value of the data sector address. | 09-01-2011 |
| 20110222384 | OPTICAL DISC DEVICE AND OPTICAL DISC DEVICE DRIVE METHOD - An optical disc apparatus of the present invention records and/or reproduces data to/from an optical disc where data is recorded on one of a groove track and a land track. The optical disc apparatus includes an identification section for identifying the type of the optical disc as being either an optical disc where data is recorded or reproduced to/from a groove track or an optical disc where data is recorded or reproduced to/from a land track. The identification section identifies the type of the optical disc while in a state where a focus control is being performed and a tracking control is not being performed. | 09-15-2011 |
| 20110280113 | Optical Storage System and Method for Writing Data to an Optical Disc - The invention relates to an optical data system comprising an optical disc drive and a host. The optical disc drive is arranged to receive an optical disc and perform read and write actions with respect to the optical disc. The host is arranged to instruct the optical disc drive to perform a read or write action with respect to the optical disc. The optical disc drive may be arranged to
| 11-17-2011 |
| 20110292779 | METHOD FOR IDENTIFYING GROUP OF MULTILAYER DISC, AND OPTICAL DISC DEVICE - The present invention provides a method for determining what group a given multilayer optical disc belongs to. The disc is one of a number of multilayer optical discs, which are designed so that information stored is retrievable from any of the discs by irradiating the disc with a light beam having the same wavelength and which have been classified into multiple groups. According to this method, performed first is Step (A) of measuring either a distance from a first one of multiple information layers of the given multilayer optical disc to a second one thereof, which is located adjacent to the first information layer, or a distance from the first information layer to the surface of the optical disc. Next, Step (B) of determining, by the distance measured, what group the given multilayer optical disc belongs to is performed. | 12-01-2011 |
| 20110292780 | INFORMATION RECORDING MEDIUM EVALUATION METHOD, INFORMATION RECORDING MEDIUM, METHOD FOR MANUFACTURING INFORMATION RECORDING MEDIUM, SIGNAL PROCESSING METHOD AND ACCESS CONTROL APPARATUS - A method for rating an information recording medium according to the present invention includes the steps of: receiving a digital read signal, which has been generated based on an analog read signal representing information that has been read from the information recording medium, and shaping the waveform of the digital read signal; subjecting the shaped digital read signal to maximum likelihood decoding, thereby generating a binarized signal showing a result of the maximum likelihood decoding; and calculating the quality of the digital read signal based on the shaped digital read signal and the binarized signal. If the quality of the read signal is calculated by a PRML method in which a number of zero-cross portions are included in a merging path of a minimum difference metric, the quality is calculated by using only a state transition pattern in which only one zero-cross portion is included in a merging path of a non-minimum difference metric. | 12-01-2011 |
| 20110310716 | METHOD AND DEVICE FOR DETECTING THICKNESS OF OPTICAL DISC - A method for detecting a thickness of an optical disc is provided. Firstly, a beam intensity signal and a focusing error signal are generated. Then, a first time interval for a focus point of the laser beam to move from a first layer to a second layer of the optical disc is acquired according to the beam intensity signal or the focusing error signal. Then, a second time interval between two peak values of an S curve of the focusing error signal is detected. Afterwards, the thickness between the first layer and the second layer is calculated according to a known S-curve detection range, the first time interval and the second time interval. The S-curve detection range is multiplied by said first time interval and divided by said second time interval to obtain the thickness between the first layer and the second layer of the optical disc. | 12-22-2011 |
| 20120026850 | OPTICAL DISC REPRODUCTION APPARATUS - An instantaneous jitter information detection section detects, based on first and second digital values indicating different polarities relative to a predetermined reference value, an instantaneous gradient value corresponding to a difference value between the first and second digital values, and an instantaneous deviation value corresponding to a difference value between an intermediate value between the first and second digital values and the reference value. An information conversion section converts, based on an inversely proportional conversion table, the instantaneous gradient value to an inversely proportional value. An arithmetic section detects an instantaneous variance value by multiplying the instantaneous deviation value and the inversely proportional value together, and squaring a value obtained by the multiplication, and detects an integrated value by accumulating the instantaneous variance value. A standard deviation detection section detects a square root of a mean value of the integrated value as the absolute jitter value. | 02-02-2012 |
| 20120033536 | OPTICAL RECORDING METHOD AND OPTICAL RECORDING DEVICE - In an optical recording method, recording parameters (WU) to be used for recording are obtained using recommended recording parameter values (WR) read from an optical recording medium and previously obtained vector information (PC) and approximation coefficients (Ca, Cb) (S | 02-09-2012 |
| 20120140607 | SIGNAL PROCESSING APPARATUS FOR OPTICAL DISC AND METHOD THEREOF - A signal processing apparatus for an optical disc with a first type region and a second type region is disclosed. The signal processing apparatus comprises: a determining unit, arranged to determine that an input signal is a first type input signal derived from the first type region or a second type input signal derived from the second type region; a peak-bottom detector, arranged to detect a peak-bottom value of the input signal; and a control circuit arranged to determine that the peak-bottom value is derived from the first type input signal or the second type input signal according to a determining result from the determining unit. | 06-07-2012 |
| 20120213048 | METHOD AND APPARATUS FOR DETECTING LAND PRE-PITS - Aspects of the disclosure provide a method for detecting land pre-pits. The method includes detecting, based on a land pre-pit threshold, a land pre-pit data stream from a signal responsive to land pre-pits on an optical medium, comparing a characteristic of the detected land pre-pit data stream in a specific number of wobble periods with a pre-determined land pre-pit characteristic in the specific number of wobble periods, and adjusting the land pre-pit threshold based on the comparison. | 08-23-2012 |
| 20120275284 | OPTICALLY-READABLE ARTICLE WITH ELECTRO-OPTICAL ACCESS CONTROL DEVICE - An optically-readable disk includes a device that disrupts readability of the disk when the disk is spun at an angular velocity substantially greater than required to play the disk in its intended playing device, or when a defined integral of velocity and time is exceeded. The device may include a fluid container that disperses a data-disruptive fluid. The device may include a membrane or layer that is disrupted when the disk is rotated above a defined angular velocity, or when a defined integral of velocity and time is exceeded. The device may include an electro-optical material that is activated by an electrical signal from a controller in response to an input from a sensor responsive to motion of the disk. | 11-01-2012 |
| 20130039159 | OPTICAL DISK APPARATUS AND ITS REPRODUCING METHOD - Amplitude and frequency of a high-frequency signal superposed on a reproduction laser beam are changed in accordance with a reproduction spot diameter on the surface of the recording layer upon discrimination of an optical disk in initial adjustment after insertion of the optical disk and change of a layer of a multi-layer optical disk. Further, the high-frequency signal is not superposed on the reproduction laser beam until end of the discrimination and change to a target layer upon discrimination of the optical disk and change of a layer of a multi-layer optical disk. | 02-14-2013 |
| 20130100790 | Optical beam positioning at radial location of optical disc using series of segments at edge of optical disc - A reference pattern on the non-data side (or label side) of an optical data storage disc enables optical disc devices to register a position of a laser to an absolute radial location on the disc's non-data side. The absolute radial location serves as a reference track to which that all radial positioning can be referenced. | 04-25-2013 |
| 20130107689 | HEADER REGION EVALUATION CIRCUIT, OPTICAL DISK APPARATUS, AND HEADER REGION EVALUATION METHOD | 05-02-2013 |
| 20130107690 | INFORMATION RECORDING/REPRODUCING DEVICE AND METHOD | 05-02-2013 |
| 20140286150 | DATA ARCHIVE SYSTEM AND QUALITY INSPECTION METHOD - Disclosed is a data archive system that executes inspection of a recording quality of an optical disc, estimates a recording quality deterioration factor, and informs it to a user, and a method for estimating the recording quality deterioration factor. The data archive system has a server and a data library device. The server has a whole control part, a data library I/F part, and a recording medium. The data library device has multiple recording media, a recording medium storing part, multiple recording/reproducing parts, and a library control part. The recording medium stores attribute information about the recording medium. The whole control part executes first quality inspection on a first recording medium, executes second quality inspection on a second recording medium, refers to attribute information of the recording media recorded on the information recording medium, and controls so that a factor deteriorating the qualities of the recording media may be estimated. | 09-25-2014 |
| 20140293763 | OPTICAL DISC DEVICE AND OPTICAL DISC DETERMINATION METHOD - An optical pickup of an optical disc device is configured to read a signal recorded in an optical disc. An envelope signal generation unit is configured to generate an envelope signal from the signal read by the optical pickup. An off-track level storage unit stores an off-track level. An off-track signal generation unit is configured to generate an off-track signal by binarizing the envelope signal, which is generated by the envelope signal generation unit, using the off-track level stored by the off-track level storage unit. A determination unit is configured to output a disc determination signal, which indicates whether the optical disc is a standard-density optical disc or a high-density optical disc in which a line density is higher than the standard density, based on the off-track signal generated by the off-track signal generation unit. | 10-02-2014 |
