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| Number | Title | Issue Date |
| 8130606 | Method and apparatus for encoding/decoding data, and method and apparatus for recording/reproducing data A method and apparatus for stably encoding/decoding data, and a method and apparatus for recording/reproducing data are disclosed. The method inserts decoding information into a data section including several predetermined-bit data, determines encoding values of the... | 03/06/2012 |
| 8068391 | Optical recording/reproducing method, system, and program An optical recording/reproducing system 1 reads a recorded signal written to a recording track of a recording medium 3 by light. The light is modulated by a drive signal on which a frequency signal is superimposed. The light is scanned along the record... | 11/29/2011 |
| 8009531 | Methods for overwite cycle improvement of optical storage medium and related machine readable media A method of recording data onto an optical storage medium includes: before starting recording data onto the optical storage medium from an expected link point on the optical storage medium, setting a current recording condition corresponding to the expected link poi... | 08/30/2011 |
| 7986596 | Optical recording/reproducing method, system, and program An optical recording/reproducing system 1 reads, based on a predetermined reproduction clock, information associated with a recording track of a recording medium by irradiating frequency light. The frequency light is scanned at a predetermined scan velocity. ... | 07/26/2011 |
| 7791994 | Apparatus and method for demodulating input signal modulated from reference signal and data signal An apparatus and method for demodulating an input signal modulated from a reference signal and a data signal are disclosed. The apparatus includes a determining unit, a first calculating unit, and a comparing unit. The determining unit is utilized for determining a ... | 09/07/2010 |
| 7764580 | Demodulator HMW demodulation is effected more reliably with a simple configuration. A reproduced wobble signal is caused to pass through a BPF previously set to a center frequency 2fwob, to thus enhance a second harmonic component. The wobble signal having passed through a BPF ... | 07/27/2010 |
| 7706222 | Demodulator, disk drive device, and demodulation method A demodulator for demodulating an input signal including a predetermined modulated signal includes a multiplication fundamental wave generator for outputting a multiplication fundamental wave for the predetermined modulated signal, a calculator for multiplying the m... | 04/27/2010 |
| 7599262 | Optical disk apparatus To detect an MSK modulation mark from an MSK-modulated wobble signal without fail. A wobble signal of an optical disk is supplied to an address decoding circuit. The address decoding circuit performs exclusive-OR operation of a binarized wobble signal and a referenc... | 10/06/2009 |
| 7590037 | Method and apparatus for decoding encoded data around a discontinued area on an optical storage medium A method for decoding encoded data around a specific area on an optical storage medium, wherein the specific area has discontinued data. The method includes: detecting at least one type of sync patterns within the encoded data; determining an offset value correspond... | 09/15/2009 |
| 7573790 | Light source driving unit and optical storage apparatus A light source driving unit includes a modulating signal generating section generating modulating signals based on driving waveform generating information of a light source, a current source selecting section selecting one or more currents output from current source... | 08/11/2009 |
| 7570555 | Digital data demodulator A digital data demodulator which can reduce a loss of decodable digital data, and increase capability of reproducing digital data inputted through a transmission line even when an error occurs in the transmission line. In the digital data demodulator, a specific pat... | 08/04/2009 |
| 7561504 | 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 for encrypting entered digital data according to a plurality of key information; an optical disk substrate manufacturi... | 07/14/2009 |
| 7539097 | Optical disk device An optical disk device is provided with a first analog-to-digital converter for converting a push-pull signal detected from an optical disc medium into a digital sampling signal according to a sampling clock in the vicinity of a channel frequency. The optical disk d... | 05/26/2009 |
| 7440390 | Information recording carrier and information reproducing apparatus for the same Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by phase shift modulation while recorded digitally with a single or multiple waves as a channel bit. ... | 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 |
| 7408851 | Pseudo multi-channel play-back apparatus Compressed audio data for 5.1 channels stored in the DVD-ROM 11A is read by the AC-3 decoder 12 of a pseudo multi-channel stereo play-back apparatus and, after expansion, stored temporarily in a buffer 13, channel by channel. Among stored audio ... | 08/05/2008 |
| 7408871 | Optical disc with wobbled tracks and apparatus using this optical disc Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the ... | 08/05/2008 |
| 7408853 | Reproduction-only recording medium, reproducing apparatus, reproducing method, and disk manufacturing method A ROM disk having a block data format provided with linking areas as with a rewritable disk. Main data recorded in a main data area and linking data recorded in a linking area in each block are scrambled by identical scrambling data. The scrambling data is generated... | 08/05/2008 |
| 7408852 | Rewritable optical recording medium, recording method on the same, and optical disc recording/retrieving apparatus In a rewritable compact disc having a wobble groove on a substrate, crystal and amorphous states of a phase-change recording layer are an unrecorded/erased state and a recorded state, respectively. When the recording layer is exposed to recording light, amorphous ma... | 08/05/2008 |
| 7403456 | Optical disc recording method and apparatus An optical disc recording method and apparatus is capable of overwriting a phase change optical disc at high speed. With a preceding erasing beam out of two laser beams, a modulation component in an RF signal recorded on an optical disc is erased to a state where no... | 07/22/2008 |
| 7400569 | Optical disc with wobbled tracks and apparatus using this optical disc Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the ... | 07/15/2008 |
| 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 |
| 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 |
| 7372964 | Method and apparatus for recording information including secret information and method and apparatus for reproduction thereof An information recording method for recording content information in a recording medium having at least re-readable area, comprising converting, based on a first conversion rule φ1, first information including a first component for obtaining content control ... | 05/13/2008 |
| 7362972 | Laser transmitter capable of transmitting line data and supervisory information at a plurality of data rates An optical transmitter for sending supervisory data signals and line data signals as a composite optical signal through an optical fiber link is disclosed. The transmitter may take the form of a transmitter, transceiver or transponder and includes circuitry for rece... | 04/22/2008 |
| 7355942 | Optical disk and optical disk drive for suppressing a digital sum value and low-frequency components An optical disk apparatus for suppressing a Digital Sum Value (DSV) and performing Running Optimum Power Control (R-OPC). An encoding/decoding circuit inserts a synchronization information item to a head of only one synchronous frame when data are recorded on an opt... | 04/08/2008 |
| 7356142 | Secure compact disk and player A method for recording data on an optical medium is disclosed. In one embodiment, the method includes receiving a first plurality of frames of data at a Cross Interleave Reed-Solomon Code (CIRC) encoder, encoding the first plurality of frames of data by the CIRC enc... | 04/08/2008 |
| 7342866 | Optical disc and its information recording method and apparatus Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical disc, and a recording start head position of the Data segment to be rec... | 03/11/2008 |
| 7336207 | Modulation table, modulating apparatus and method, program, and recording medium A modulation table for converting data with a basic data length of m bits into a variable length code (d,k;m,n;r) is provided. The modulation table includes a basic table for converting data patterns into code patterns and a replacement table for replacing data patt... | 02/26/2008 |
| 7333415 | Information recording medium having first data which has been displaced according to second data, and information reproducing apparatus and method On a disc master DS, a record mark is formed at a displaced position to which the record mark is displaced, in a direction crossing the reading direction thereof, according to a wobble signal. The wobble signal is obtained by modulating the second data including an ... | 02/19/2008 |
| 7333033 | Modulation table, modulating device and method, program, and recording medium A modulation table configured to convert data having a basic data length of m bits into variable length code (d, k; m, n; r) is provided. The modulation table includes a maximum constraint length r>1, a minimum run of d (d>0), a maximum run of k, and a basic codewor... | 02/19/2008 |
| 7333408 | Demodulator, disk drive device, and phase adjustment method In a demodulation process of a first modulated signal and a second modulated signal, phase adjustment is automatically performed by generating, in response to demodulation results, an optimum phase value of a second internal reference wave for demodulating the secon... | 02/19/2008 |
| 7321530 | Decoder circuit, and photo-detecting amplifier circuit and optical pickup including the decoder circuit for disk recording/reproducing apparatus A decoder circuit of the present invention, mounted on an integrated circuit, decodes input voltage Vin supplied to a single external input terminal into three or more control outputs, and an object of the present invention is to reduce the size of a chip. The foreg... | 01/22/2008 |
| 7317667 | Wobble signal extraction circuit and optical disk device A wobble signal extraction circuit for extracting a wobble signal from a first optical disk signal containing a wobble signal component caused by a wobble formed on a surface of an optical disk and a second optical disk signal containing a wobble signal component of... | 01/08/2008 |
| 7310292 | Optical disk reproducing device that demodulates digital data by switching between a channel bit frequency and a frequency that is half of the channel bit frequency A data demodulation process rate is varied according to a reproduction state, thereby reducing power consumption while maintaining a reading performance in a favorable state. A channel rate process data demodulation device performs a data demodulation process by emp... | 12/18/2007 |
| 7304927 | Enhanced testing region access for optical disks An optical disk apparatus is disclosed which makes accesses on a block-by-block basis to an optical disk having a recording track segmented into first recording areas by first address information correlated with wobbling information of the recording track, the block... | 12/04/2007 |
| 7296215 | Signal processing method and signal processing circuit In one embodiment, a symbol error correction encoder effects block interleaving on recording data and thereafter performs first error correction encoding on the recording data. Next, a symbol error correction encoder performs encoding on the whole block. A reproduci... | 11/13/2007 |
| 7286458 | Quality-testing apparatus and method A quality-testing apparatus is disclosed for an optical disk of the type that stores optically readable information in the form of a spiral or annular pattern defining a plurality of essentially concentric tracks. The apparatus has a laser light source and a drive m... | 10/23/2007 |
| 7287211 | Data readout device and data readout method A data readout device generates decoded data based on a data bit determined by performing a hard-decision on likelihood data. The likelihood data is generated using an iterative decoding method corresponding to a turbo-coding process. The decoding process is perform... | 10/23/2007 |
| 7280661 | Data output method and apparatus, data playback method and apparatus, data recording method and apparatus, and data recording and playback method and apparatus A method for outputting data read from a recording medium including decoding data read from a recording medium, embedding electronic watermark information in the decoded data when the decoded data is output as recording data, and outputting the resulting data. ... | 10/09/2007 |
