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| Number | Title | Issue Date |
| 8189432 | Data storage system and linear tape 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, syst... | 05/29/2012 |
| 8107328 | Method and apparatus for calibrating optical recording system Aspects of the disclosure provide a method for efficiently calibrating an optical recording device. The method can include receiving a first signal corresponding to a wobbled track of a memory medium, phase-locking a second signal to the first signal, the second sig... | 01/31/2012 |
| 8050151 | Device for accessing address information in an optical disc An address-accessing device includes first and second information generators for producing first and second information according to the received address signals; a phase offset detector for producing a phase offset according to the first and second information; a r... | 11/01/2011 |
| 8031564 | Method and circuit for evaluating a wobble signal The invention relates to a method for evaluating a wobble signal. Also described is a circuit for performing such method and an apparatus for reading from and/or writing to optical recording media using such method or circuit. According to the invention the method i... | 10/04/2011 |
| 8018798 | Demodulation circuit and optical disk drive A demodulation circuit accurately demodulates a wobble signal of an optical disk without being affected by a phase shift induced by crosstalk. An A-D converter subjects wobble signal reproduced from an optical disk to A-D conversion and feeds a result of conversion ... | 09/13/2011 |
| 7961564 | Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor An information recording medium 1 at least comprises a substrate 13 having a microscopic pattern 20, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a groove section G and a land section L al... | 06/14/2011 |
| 7957230 | Information recording medium having a wobbling groove structure An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having tra... | 06/07/2011 |
| 7933173 | Wobble signal extraction circuit and optical disk device A wobble signal extraction circuit includes: an RF signal component acquiring portion for acquiring an RF signal component from at least one of first and second signals received by two light receiving portions, the two light receiving portions being obtained through... | 04/26/2011 |
| 7738326 | Signal processing method of wobble signal, recording and reproducing method of optical disc, optical disc apparatus, program, and recording medium In a method of and an apparatus for creating a reproduced wobble signal by subtracting an estimated crosstalk signal, expressed by a sine waveform having a frequency approximately equal to the meandering frequency of grooves, from an original wobble signal and recor... | 06/15/2010 |
| 7738327 | Device and method for scanning an optical recording medium and optical recording medium The present invention relates to a device (1) for scanning an optical recording medium (3), comprising an optical unit (5) for reading data from and/or writing data to said recording medium (3) by scanning said recording medium (3)... | 06/15/2010 |
| 7729210 | Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor An information recording medium 1 at least comprises a substrate 13 having a microscopic pattern 20, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a groove section G and a land section L al... | 06/01/2010 |
| 7729211 | Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor An information recording medium 1 at least comprises a substrate 13 having a microscopic pattern 20, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a groove section G and a land section L al... | 06/01/2010 |
| 7724615 | Apparatus and method for determining type of an optical disk An apparatus and a method for determining the type of an optical disk are provided. Firstly, an RF signal of the optical disk in an optical disk drive is read out. Next, a bandpass signal is extracted from the RF signal by a bandpass filter whose central frequency i... | 05/25/2010 |
| 7715285 | Information recording medium having a plurality of recording layers An information recording medium is provided with a plurality of information recordable recording layers, and a spiral or concentric tracks are formed on each of the plurality of recording layers. At least a portion of each track has wobbles corresponding to a wobble... | 05/11/2010 |
| 7697380 | Apparatus for detecting the wobble carrier frequency of an optical disk and method for same An apparatus for detecting the wobble carrier frequency of an optical disk is disclosed. The apparatus comprises an offset canceller, a binary conversion module, an adjustable band pass filter, and a frequency detection module. The offset canceller cancels the direc... | 04/13/2010 |
| 7693011 | Wobble detection circuit and method for processing wobble signals The invention provides a wobble detection circuit. An exemplary embodiment of the wobble detection circuit comprises an automatic gain control module, an analog to digital converter, a digital band pass filter, and a digital band pass filter. The automatic gain cont... | 04/06/2010 |
| 7693012 | Apparatus for demodulating address in pre-groove symbols and apparatus for decoding pre-pit symbols The invention provides an apparatus for demodulating an Address In Pre-groove (ADIP) symbol. The ADIP symbol is carried by a wobble signal of an optical disk and comprises a series of ADIP bits permuted according to one of a plurality of permutation patterns to make... | 04/06/2010 |
| 7688688 | Information recording medium having a wobbling groove structure An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having tra... | 03/30/2010 |
| 7636278 | Information recording system and an information recording method An information recording system for recording information on an optical disc using a reference clock signal generated based on a push-pull signal including a wobble frequency component, the system includes an amplitude obtaining unit for obtaining an amplitude value... | 12/22/2009 |
| 7619950 | Recording medium and apparatus method for forming, recording and reproducing the recording medium A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, which includes copy protection information for preventing illegal copying of the contents recorded on the recording medium, and to methods and apparatuses for forming, reco... | 11/17/2009 |
| 7561496 | Recording medium with copy protection information and apparatus/method for forming, recording, reproducing, and restricting reproduction of the recording medium A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, which includes copy protection information for preventing illegal copying of the contents recorded on the recording medium, and to methods and apparatuses for forming, reco... | 07/14/2009 |
| 7539088 | Optical disc recording and reproducing method adaptive to wobble pregroove An optical disc has a wobble pregroove which continues in a circumferential direction of the optical disc and wobbles in a radial direction of the optical disc such that the wobble pregroove meanders around a mean center line of meandering. Information recording pro... | 05/26/2009 |
| 7460445 | 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 disk formed with pit strings and mark strings with binary number series features 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... | 12/02/2008 |
| 7457207 | Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor An information recording medium 1 at least comprises a substrate 13 having a microscopic pattern 20, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a groove section G and a land section L al... | 11/25/2008 |
| 7438547 | Optical recording medium and master disc for manufacturing optical recording medium An optical recording medium allowing high-density recording, where a groove having a shallow U-shaped cross section wider than certain width, a master for manufacturing optical recording medium, a manufacturing apparatus thereof, and a manufacturing method thereof a... | 10/21/2008 |
| 7433277 | Wobble demodulator and wobble demodulation method A wobble demodulator for reproducing digital information from an optical recording medium in which a track is formed in accordance with a wobble signal that is MSK-modulated so as to contain the digital information by a carrier signal with a predetermined frequency ... | 10/07/2008 |
| 7430160 | Optical recording medium with different wobble characteristics between the user data area and the lead-out area An optical recording medium has a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out are... | 09/30/2008 |
| 7428204 | Method for recording address information on optical recording medium, optical recording medium including address information recorded thereon by the same method, and method for detecting address information recorded on the same optical recording medium A method for recording address information on an optical recording medium, and the optical recording medium are discussed. According to an embodiment, there is provided an optical recording medium including a wobble-shaped recording track that is formed thereon base... | 09/23/2008 |
| 7423956 | Optical disc having uniform structure An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data are... | 09/09/2008 |
| 7420889 | Optical disc tracking control device, tracking control method, and tracking control program A tracking control apparatus for stable tracking lead-in of an optical disc which has wobble grooves as tracks, including: a signal detection unit that detects tracking error and wobble signals from an optical spot; a speed detection unit that calculates a relative ... | 09/02/2008 |
| 7414957 | Optical disc having uniform structure An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data are... | 08/19/2008 |
| 7414956 | Optical disc An optical disc includes a read-only area having a first wobble, which is a data wobble formed in the read-only area for only reading, a readable/writable area having a second wobble, which is different from the data wobble, and a connection area between the read-on... | 08/19/2008 |
| 7411879 | Optical disk device An optical disk device which drives an HD-DVD or the like. When recording or reproducing data with respect to an optical disk of HD-DVD, the address information is demodulated by an address decoding circuit and is supplied to a system controller. The system controll... | 08/12/2008 |
| 7411873 | Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor An information recording medium 1 at least comprises a substrate 13 having a microscopic pattern 20, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a groove section G and a land section L al... | 08/12/2008 |
| 7403452 | Optical disc An optical disc includes a read-only area having a first wobble, which is a data wobble formed in the read-only area for only reading, a readable/writable area having a second wobble, which is different from the data wobble, and a connection area between the read-on... | 07/22/2008 |
| 7400559 | Information recording medium having a wobbling groove structure An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having tra... | 07/15/2008 |
| 7400561 | Single PLL demodulation of pre-formatted information embedded in optical recording medium A method and apparatus demodulate pre-formatted information embedded in an optical recording medium. The demodulation includes (a) receiving a wobble signal representing data symbols frequency-modulated on a carrier frequency, (b) generating a phase delta signal rep... | 07/15/2008 |
| 7400558 | Optical disc An optical disc includes a read-only area having a first wobble, which is a data wobble formed in the read-only area for only reading, a readable/writable area having a second wobble, which is different from the data wobble, and a connection area between the read-on... | 07/15/2008 |
| 7394050 | Method of vertical deviation disc detection A method is provided to detect whether vertical deviation occurs as an optical disc spins in an optical disc player having a pickup head pre-installed in a balanced position at a focal distance. When moving towards and away from the balanced position, the pickup hea... | 07/01/2008 |
| 7391678 | Information recording medium having a wobbling groove structure An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having tra... | 06/24/2008 |
