Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor
Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980)
11/1990
11/21/1990CN1010517B Method of and device for storing and reading digital information, at protected or not by an error correcting code
11/20/1990US4972471 Encoding system
11/20/1990US4972417 PCM data transmitting apparatus and method
11/20/1990US4972416 Error detection and correction method
11/20/1990US4972401 Optically readable record carrier with track undulations for producing a synchronizing clock signal and apparatus for forming such track
11/20/1990US4972335 Video signal recording and reproducing apparatus and method suitable for recording video signals including horizontal scanning line signals
11/20/1990US4972316 Method of handling disk sector errors in DASD cache
11/20/1990US4972276 Regeneration system for digital magnetic recording information
11/20/1990US4972190 Analog signal digitizer for recording on a video
11/20/1990US4972164 Amplitude compressing/expanding circuit
11/15/1990WO1990013958A1 Receiver for quadraphase modulation signals
11/15/1990WO1990013864A1 Improved security for machine-writeable data storage systems
11/15/1990DE4005658A1 Kompatibles abspielgeraet fuer bildplatten verschiedener systeme Compatible player for picture discs of various systems
11/14/1990EP0397472A2 Rotary head recording and playback apparatus and method
11/14/1990EP0397354A2 Device for detecting cross talk level of optically read signal
11/14/1990EP0397238A1 Information recording system, and recording device and record carrier for use in such an information recording system
11/14/1990EP0397234A1 Apparatus for reading an information pattern from a record carrier and signal-processing circuit for use in such apparatus
11/14/1990EP0397126A2 Defect inspecting apparatus for disc-shaped information recording media
11/13/1990US4970712 Method for recording data onto optical data recording cards using pits for indicating the center line positions of data arrays provided on said cards
11/13/1990US4970609 Clocking method and apparatus for use with partial response coded binary data
11/13/1990US4970602 Disk player for displaying recorded audio signals
11/13/1990US4970582 Method and circuit for recovering a logic signal from a band limited signal channel
11/07/1990EP0217924B1 Recovery of stored data from mutilated tape data blocks
11/07/1990CN1046806A Enhanced data formats and machine operations for enabling error correction
11/06/1990US4969139 Optical information recording and reproducing apparatus having an improved detection system for detecting fouling of a disk or an internal optical system
11/06/1990US4969059 Offset nulling system for computer disk drives
11/06/1990US4968985 Data demodulation system
11/01/1990WO1990013121A1 Pll circuit for generating a beat signal in a recorder
10/1990
10/31/1990EP0395347A2 Sampling frequency reproduction system
10/31/1990EP0395205A2 Enhanced error recovery track recording
10/31/1990EP0395125A2 A PCM recording and reproducing apparatus
10/31/1990EP0395118A1 Analog signal delay circuit
10/31/1990EP0394686A2 Integral data storage disk card
10/30/1990US4967403 Multi-format optical disk and reading device
10/30/1990US4967289 PCM signal recording apparatus
10/30/1990US4967161 Signal processing method and apparatus
10/30/1990US4967155 Environmentally controlled media defect detection system for Winchester disk drives
10/30/1990CA1275739C Error correction method
10/30/1990CA1275730C Reading circuit in an optical disk apparatus
10/25/1990DE3912998A1 Digital audio tape recorder with copy protection - uses amplitude reduction of supplied analogue signal before recording
10/25/1990DE3912838A1 Pll-schaltung zum erzeugen eines taktsignals in einem recorder PLL circuit for generating a clock signal in one recorder
10/24/1990EP0393821A2 Data storage process with skewed XOR error check
10/24/1990EP0393633A2 Low frequency component restoration circuit for restoring and compensating for low frequency component lost in digital signal transmission system
10/24/1990EP0393207A1 Recording method and recording apparatus
10/24/1990EP0221936B1 Automatic correction system for the servo-circuit of a device with optical scanning of a rotating information support
10/24/1990EP0144431B1 Error-correcting apparatus
10/24/1990CN1046408A Appangement for recording and andio signal
10/24/1990CN1010134B Method and apparatus for recording and/or reproducing digital data
10/24/1990CA2011824A1 Integral data storage disk card
10/23/1990US4965873 Pilot enhanced/amplitude equalized impulse magnetic
10/23/1990US4965681 Magnetic recording apparatus of rotary magnetic type having cross-talk cancelling function
10/23/1990US4965680 Apparatus for releasing a restriction on the recording of an information signal on a recording medium
10/23/1990US4965674 Recording and reproducing system with selective matrix conversion
10/23/1990US4965440 Information reproducing apparatus
10/23/1990CA1275498C Apparatus for recording a digital data
10/23/1990CA1275496C Apparatus for recording and/or reproducing an information signal
10/18/1990DE4008937A1 Magnetaufzeichnungs- und wiedergabegeraet Magnetic recording and wiedergabegeraet
10/17/1990EP0392853A2 An apparatus for recording and reproducing information on and from an optical disk
10/17/1990EP0392616A2 Method of generating an array of DPCM delta codes, method of storing image data, optical disk whereon image data are stored, and display apparatus
10/17/1990EP0392612A1 Arrangement for recording an audio signal
10/17/1990EP0392488A2 Optical video disc player
10/17/1990EP0392382A2 Error correction control apparatus
10/17/1990EP0392050A1 Method and apparatus for recording data information on a magnetic-recording medium
10/17/1990EP0392049A1 Method for expanding or compressing a time signal
10/17/1990CN1010072B Synchronizing system for digital apparatus
10/16/1990US4964128 Data transmission method for interleaved data
10/16/1990US4964109 Fast speed reproduction system for digital disc
10/16/1990US4964107 Relative timing precompensation of high-speed pulse signals for digital magnetic recoding
10/16/1990US4964094 Optical disk
10/16/1990US4964000 Circuit for separating simultaneously reproduced PCM and ATF signals having at least partially overlapping frequency bands
10/16/1990US4963998 Apparatus for marking a recorded signal
10/16/1990US4963992 Apparatus for recording/reproducing digital video signals in both a standard mode and a long playing mode
10/16/1990US4963868 Frame synchronizing method and system
10/16/1990CA1275326C Error correction apparatus for digital data
10/10/1990EP0390977A2 Servo system for a disc player
10/10/1990EP0322418B1 Data recording format for an information-bearing disk
10/10/1990EP0188627B1 Apparatus for recording and/or reproducing optical cards
10/10/1990CN1046060A Method of and device for recording data singnals on a record carrier of an inscribable type, and device for reading such a record carrier
10/09/1990US4962494 Optical disk playback device having automatic volume control
10/09/1990US4962301 Method of reciprocally recording data on card-like record medium for unidirectional reading
10/08/1990WO1990012451A1 Frequency modulator
10/04/1990DE4009952A1 Datensignal-wiedergabevorrichtung Data signal reproducing device
10/03/1990EP0390724A1 Data recording and reproducing circuit
10/03/1990EP0390601A2 Information recording disk, and information record/reproducing method and apparatus utilizing the same
10/03/1990EP0390576A1 Recording/reproducing apparatus
10/03/1990EP0390554A1 Magnetic reproducing head amplifier
10/03/1990EP0390510A2 Optical information reproducing apparatus
10/03/1990EP0390268A2 Method of and device for recording data signals on a record carrier of an inscribable type
10/03/1990EP0390226A1 Jitter absorption circuit
10/03/1990EP0390037A2 Pitch shift apparatus
10/03/1990EP0389689A1 Method for transmitting a transmission signal and a transmitting device and a receiving device for use in the method
10/03/1990CN1009892B Error detection and concealment using predicted signal values
10/02/1990US4961204 PCM signal generating/reproducing apparatus
10/02/1990US4961182 Information retrieving system with level clamping
10/02/1990US4961116 Method of, and apparatus for, facilitating sychronization of recorded audio and video information
10/02/1990CA1274915A1 Method of making a linearity standard magnetic tape
10/02/1990CA1274912A1 Phase error correcting apparatus
10/02/1990CA1274883A1 Clock recovering device
09/1990
09/30/1990WO1990011662A1 Clock generator
09/27/1990DE3909437A1 Magnetic tape apparatus with automatic level setting
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