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| Number | Title | Issue Date |
| 8174944 | Write strategy calibration for optical drives Laser write parameters in an optical drive are calibrated. A parameter range for the write parameters is set based on a recordable medium, and a number of test runs are recorded on the recordable medium while varying the write parameters. Write performance character... | 05/08/2012 |
| 7433280 | Method and system for buffering data file to buffer memory This invention provides a method and a system to read and buffer an audio data file from an optical storage medium into a buffer memory. The data file comprises blocks sequentially stored in the medium. Each block comprises a subcode block with encoded subcodes and ... | 10/07/2008 |
| 7351704 | Indazole-carboxamide compounds as 5-HTreceptor agonists The invention provides novel indazole-carboxamide 5-HT4 receptor agonist compounds. The invention also provides pharmaceutical compositions comprising such compounds, methods of using such compounds to treat diseases associated with 5-HT4 recep... | 04/01/2008 |
| 7310823 | Digital information recording apparatus and outputting apparatus A digital information recording apparatus includes multiple recording circuits for making multiple copies. The apparatus limits the number of copies, however, in accordance with copy information provided within the digital information itself. When the number of copi... | 12/18/2007 |
| 7286069 | Systems and methods for clock mode determination utilizing divide ratio testing A system for determining a data converter operating mode includes measurement circuitry for measuring master clock frequency of a master clock signal and a frequency ratio between a frequency of a data clock signal and the master clock frequency and a mapping system... | 10/23/2007 |
| 7248548 | Audio player When underflow of a sub-Q data table occurs, a sub-Q data processing section does not read and output sub-Q data but outputs only audio data. Moreover, to achieve consistency between audio data and the sub-Q data in terms of buffer management, an input processing se... | 07/24/2007 |
| 7245658 | Read channel apparatus for an optical storage system A read channel apparatus is disclosed for reading data recorded on an optical storage system. An exemplary sampling device samples an analog read signal generating from the optical storage system to generate a sequence of sample values. A subtractor subtracts an est... | 07/17/2007 |
| 7231731 | Information record medium having two phase pit areas of mutually different depths and groove track area On an information record medium (1), information is optically recorded and reproduced while a servo control is performed with respect to the information record medium by a push-pull method. The information record medium is provided with: a record/reproduction... | 06/19/2007 |
| 7224760 | High-speed wide bandwidth data detection circuit A high-speed, wide bandwidth data detection circuit includes a phase detection module, a data detection module, a loop filter, and a voltage controlled oscillator. The phase detection module is operably coupled to produce a controlled current based on a current mode... | 05/29/2007 |
| 7212567 | Read channel apparatus and method for an optical storage system A read channel apparatus is disclosed for reading data recorded on an optical storage system at a predetermined baud rate. The apparatus asynchronously samples an analog read signal generating from the optical storage system and subtracts an estimated DC offset from... | 05/01/2007 |
| 7197237 | Method for transferring real-time files The recording or reproduction of real-time files (RF) imposes certain requirements on the recording and reproduction means. A DVD-RAM drive, for example, can read and write contiguous sectors rapidly, but requires a relatively long time in the event of jumps to othe... | 03/27/2007 |
| 7145855 | Method of controlling an optical disk drive by calculating a target frequency of a DPLL signal A control circuit for an optical disk drive includes a frequency detector, a phase detector, a low pass filter, a voltage-controlled oscillator (VCO), and a controller. The frequency detector and the phase detector both receive an eight-to-fourteen modulation (EFM) ... | 12/05/2006 |
| 7110330 | Method of providing sub-code data of optical disc drive to host computer A sub-code providing method that provides correct sub-code data when sub-code data is requested from a host when a reproduction mode is performed in an optical disc drive. In a method providing sub-code data to a host computer in an optical disc drive formed so that... | 09/19/2006 |
| 7092331 | Reproduction of audio data from recording medium The present invention provides an audio data recording medium reproducer, wherein CPU 10 which writes audio data read by reader 11 into buffer memory 13 and buffer memory controller 21 which transfers the data to buffer memory 22 a... | 08/15/2006 |
| 7084802 | Signal processing circuit A signal processing circuit can obtain a ratiometric output with high precision and high responsiveness in a relatively easy and simple way. A pulse generation circuit generates a pulse signal corresponding to an input signal. An integration part generates an integr... | 08/01/2006 |
| 7053720 | Configurable voltage controlled oscillator system and method including dividing forming a portion of two or more divider paths A phase lock loop with multiple divider paths is presented herein. The phase lock loop can be used to provide a wide range of frequencies. The phase lock loop can also be used as a portion of a clock multiplier unit or a clock data and recovery unit. ... | 05/30/2006 |
| 7046476 | Method apparatus and system for accessing discontinuous media tracks An apparatus, system, and method are disclosed for accessing discontinuous media tracks. The apparatus, in one embodiment, accesses discontinuous media tracks of a storage medium having one or more independently formed storage regions thereon. Each storage region ma... | 05/16/2006 |
| 7046603 | Information storage apparatus There is disclosed an information storage apparatus in which even when a remaining power of a battery or a galvanic cell is low, an information recording medium can safely be removed. An MPU, a spindle motor driver, and a spindle motor constitute a decelerator for d... | 05/16/2006 |
| 7020058 | Optical disc device varying, detecting and noticing a recording velocity during a recording An optical disc device records data on an optical disc by projecting a laser beam on the optical disc such that a linear density of the data becomes substantially constant. The optical disc device comprises velocity judging means, velocity changing means, recording ... | 03/28/2006 |
| 6958960 | Information reproducing method and apparatus An information reproducing method includes the steps o of reading information from an information medium that is rotated, and determining a rotation velocity of the information medium on the basis of a data transfer rate based on a specification of a read request. | 10/25/2005 |
| 6925044 | Recording control method for optical disk recording and reproducing apparatus When during the operation of recording a signal onto a disk the amount of signal data stored in a buffer RAM for temporarily storing a recording signal falls below an interruption set value, the recording operation on the disk is interrupted. Subsequently, when the ... | 08/02/2005 |
| 6904084 | Read channel apparatus and method for an optical storage system A read channel apparatus is disclosed for reading data recorded on an optical storage system at a predetermined baud rate. The apparatus asynchronously samples an analog read signal generating from the optical storage system and subtracts an estimated DC offset from... | 06/07/2005 |
| 6901039 | Writable optical drive with dynamically variable linear velocity to prevent buffer under-run The present invention relates to methods and apparatus for dynamically varying a linear velocity of an optical drive during a write operation to an optical disc to reduce the likelihood of a buffer under-run event. By reducing a linear velocity and writing speed whi... | 05/31/2005 |
| 6862658 | Retrieving streams of data from rotating storage medium while balancing various requirements Parameters characterizing physical operation of a rotating structure (disk drive) are determined by sending appropriate commands and examining the response. The measured parameters are then used to balance various requirements. For example, when starting retrieval o... | 03/01/2005 |
| 6587411 | Signal processing circuit having a voltage controlled oscillator capable of continuously changing the center frequency in accordance with a control voltage A laser beam is irradiated from a pickup head on a disk. Light reflected by the disk is detected by the pickup head. The data is binarized by a data slice circuit, and a synchronizing clock and a synchronizing signal are extracted by a PLL and synchronizi... | 07/01/2003 |
| 6493298 | Method of controlling reproduction speed of optical disk A method for controlling reproduction speed of an optical disk is disclosed in which when a data recorded in an optical disk is read, stored and transmitted to a connected instrument through a digital interface, the speed in reading and reproducing the da... | 12/10/2002 |
| 6341112 | Multi-rate optical disc recording and reproducing apparatus Multi-rate optical disc recording method and apparatus wherein data are recorded on the optical disc in accordance with a transfer rate of data, thereby preventing an unnecessary waste of a storage area in the optical disc and also enhancing a recording t... | 01/22/2002 |
| 6301209 | Recording method, recording apparatus, reproducing method and reproducing apparatus A recording method, a recording apparatus, a reproducing method and a reproducing apparatus for a recording medium such as an optical disk or the like are able to simultaneously record and simultaneously reproduce a plurality of independent information or... | 10/09/2001 |
| 6285640 | Disk reproducing apparatus having active wide-range PLL device This invention prepares two control voltage to be input to a VCO circuit. The first control voltage is used to continuously change the oscillation frequency of the VCO circuit. The second control voltage is used to continuously change the first control vo... | 09/04/2001 |
| 6026067 | Method and apparatus for reproducing audio signals at various speeds by dividing original audio signals into a sequence of frames based on zero-cross points In a method of reproducing audio signals of the present invention, audio reproducing speed can be changed without changing tone and quality of audio signals. Audio signals are filtered to extract basic audio signals. Zero-cross points in the basic audio s... | 02/15/2000 |
| 5808995 | Disk information reading control apparatus having a variable read transfer speed and a disk information reading control method A disk nearly constant in recording density from the outer circumference to the inner circumference of the disk, such as CLV and M-CAV format, is rotated at a constant angular velocity to read out information, and the information being read in at a varyin... | 09/15/1998 |
| 5802026 | Disk player for constant angular velocity reproduction of a disk Demodulated data in a digital recording signal is initially stored in a buffer memory. Meanwhile, an error detection and correction processing circuit operates based on a clock that is set according to the maximum signal processing speed so that error det... | 09/01/1998 |
| 5774292 | Disk drive power management system and method A system and method for optimizing power consumption by a disk drive unit. The system and method monitor and analyze historical use data and calculate a predicted inactivity duration. The predicted inactivity duration is used to power-down the rotational ... | 06/30/1998 |
| 5615195 | Data recording and reproducing apparatus A data recording apparatus for recording quantized data at every predetermined fundamental unit includes a quantizing circuit for quantizing a consecutive signal with a predetermined sampling frequency to generate quantized data, a separating circuit for ... | 03/25/1997 |
| 5615194 | Disk reproducing apparatus and method for reproducing an audio signal and a subcode at N times normal speed from a disk A disk reproducing apparatus is provided which can cope with the intermittent access due to track jump in the conventional CD reproducing system and which can reproduce data at N times the normal speed and produce the reproduced data at the normal speed. ... | 03/25/1997 |
| 5590112 | Track jump controller for correcting information read errors A rotation control section rotates a compact disk about twice as fast as a reproduction speed. Data read out by a pickup section are stored into a cache memory and then sequentially read out by a reproduction address generation circuit at a predetermined ... | 12/31/1996 |
| 5425014 | Apparatus for constant angular velocity reading of constant linear velocity disks An apparatus for reading at a constant angular velocity a CD-ROM or like optical disk that is designed to be driven at a constant linear velocity, thereby combining the higher storage capacity of CLV with the shorter access time of CAV. The CLV disk has c... | 06/13/1995 |
| 5414686 | Data playback apparatus for realizing high transfer date A data playback apparatus for reproduction of data from a recording medium in which digital data are serially and successively recorded. The data playback apparatus is equipped with a control unit which controls a reproduction unit for reproducing data fr... | 05/09/1995 |
| 5412628 | Apparatus for intermittently recording and reproducing a signal on a disc type recording medium An apparatus for recording and reproducing a signal on a disc type recording medium includes a recording section for intermittently writing on a disc data to be recorded whose bit rate is 1/2 or less of a rate of recording data on the disc during a record... | 05/02/1995 |
| 5345433 | Optical disc recording apparatus and optical disc reproducing apparatus An optical disc recording apparatus in which audio data obtained by digitizing analog audio signals and time base compressing the resulting digital audio signals are read from a buffer memory on the cluster-by-cluster basis so as to be recorded on a recor... | 09/06/1994 |
