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)
11/1989
11/07/1989US4879704 Optical disk, optical disk recording and reproducing apparatus and copy preventive method for optical disks
11/07/1989US4879703 Magneto-optic memory apparatus with defect detection of recording medium during erasing operation
11/02/1989WO1989010613A1 Optical disc device and reproduction of its clock signal
11/02/1989EP0339932A2 Playback method for use in a recording medium playing apparatus, recording medium, and system for recording and reproducing information on and from a recording medium
11/02/1989EP0339931A2 Method and apparatus for recording and reproducing picture information, and recording medium
11/02/1989EP0339930A2 Method and apparatus for recording and reproducing picture information, and recording medium
11/02/1989EP0339859A1 Apparatus for monitoring the marking of recorded signals
11/02/1989EP0339851A2 A magnetic record disk with embedded servo information
11/02/1989EP0339724A1 Device for recording digital information signal
10/1989
10/31/1989US4878213 System for recording and readout of information at atomic scale densities and method therefor
10/31/1989US4878131 Reproducing apparatus
10/31/1989US4878028 Technique for generating precompensation delay for writing data to disks
10/26/1989DE3833985C1 Dynamic compressor
10/25/1989EP0338839A2 Optical recording medium recording and reproducing device
10/25/1989EP0338812A2 Magnetic tape recording/reproducing apparatus for digital video signals and associated digital sound signals, and corresponding recording/reproducing method
10/25/1989EP0338794A2 Apparatus for marking a recorded signal
10/25/1989EP0338781A2 Data transmission and recording
10/25/1989EP0338245A2 Recorder with analog recording of a digital audio signal
10/24/1989US4876719 Synchronizing system for digital apparatus
10/24/1989US4876697 Three-part decoder circuit
10/24/1989US4876617 Signal identification
10/24/1989US4876616 Apparatus for reproducing a digital signal
10/24/1989US4876615 Data decoding system
10/19/1989WO1989010029A1 Method and apparatus for encoding consisting of forming a codeword by combining a first code sequence with a second code sequence
10/19/1989WO1989009965A1 Error detection method for sub-band coding
10/19/1989DE3911162A1 Signal detection device for a videotape recorder (VTR) with extended dynamic range
10/19/1989DE3910859A1 Magnetic recording/reproducing process and apparatus with read-error correction function
10/18/1989EP0337702A2 Code-error correcting device
10/18/1989EP0337650A1 Magnetic recording and/or reproducing apparatus
10/18/1989EP0336970A1 Method of storing data
10/17/1989US4875112 Compound pulse dimming circuitry for conditioning readback signals
10/17/1989US4875111 Apparatus for reproducing a digital signal
10/17/1989US4875108 Phase lock loop
10/17/1989US4875106 Method and apparatus for concealing errors in reproduced digital signals utilizing fir filter
10/11/1989EP0336685A2 Impulse noise detection and supression
10/11/1989EP0336684A2 Noise reduction in the playback of recorded sound
10/11/1989EP0336624A2 Data reproducing apparatus
10/11/1989EP0336424A2 Data signals reproducing apparatus for helical scan recording
10/11/1989EP0336041A2 Method of recording and reproducing picture information, recording medium, and recording medium playing apparatus
10/11/1989EP0336039A2 Method of recording and reproducing picture information, recording medium, and recording medium playing apparatus
10/11/1989EP0146636B1 Synchronizing circuit
10/10/1989US4873680 Apparatus and method for detecting and compensating for pit extension in an optical disk recording system
10/10/1989US4873679 Optical information recording disk and optical information recording disk apparatus
10/10/1989US4873589 Data recorder and method
10/10/1989US4873588 Apparatus for storing digital data
10/10/1989US4873587 Video signal reproducing apparatus with memory
10/10/1989US4873586 Method and apparatus for reproducing audio and video data from a disk
10/10/1989CA1262284A1 Wave shaping circuit
10/05/1989WO1989009468A1 High capacity multiple-disk storage method and apparatus
10/05/1989WO1989009467A1 Recording system having head transducers with controlled skew
10/05/1989DE3809398A1 Method of detecting the exchange of an exchangeable storage medium
10/05/1989DE3808721A1 Recorder with copying protection
10/04/1989EP0335813A2 Redundant message processing and storage
10/04/1989EP0335748A2 Recording mode identifying circuit and a reproducing apparatus comprising the same
10/04/1989EP0335655A2 Method and apparatus for detecting the mode of a frequency-modulated signal
10/04/1989EP0335546A2 Off-set nulling system and method for computer disk drives
10/04/1989EP0335529A2 Method and apparatus for encoding and mapping magnetic disk sector addresses
10/04/1989EP0335517A2 Servo address system
10/04/1989EP0335346A2 Digital signal magnetic recording and playback apparatus employing quadrature amplitude modulation
10/04/1989EP0335317A2 Digital clipping circuit with soft clip characteristics
10/04/1989EP0335273A2 System for recording and reproducing digital audio signals
10/04/1989CN1036096A Carrier disc storage for computer
10/03/1989US4872171 Method for recording digital data so as to avoid operational error on reproduction
10/03/1989US4872170 Error detection circuit
10/03/1989US4872155 Clock generator circuit and a synchronizing signal detection method in a sampled format system and a phase comparator circuit suited for generation of the clock
10/03/1989US4872154 Method for recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor
10/03/1989US4872073 Apparatus for playback of magnetically recorded data having a variable input rate
10/03/1989US4872068 Disk playing method resulting in reduced start-up time
10/03/1989US4872009 Method and apparatus for data compression and restoration
09/1989
09/28/1989DE3834645A1 Verfahren zum aufzeichnen und wiedergeben einer bildinformation A method for recording and reproducing an image information
09/27/1989EP0334661A2 Magnetic recording/reproducing apparatus
09/27/1989EP0334580A2 System and method for performing error correction on still frame audio tape format video signals
09/27/1989EP0334335A2 Video signal transmission apparatus
09/27/1989EP0334271A2 Video apparatus with an equalizing circuit in the signal path for the frequency-modulated signals
09/27/1989EP0333954A2 Method of recording and reproducing picture information, recording medium, and recording medium playing apparatus
09/26/1989US4870647 Digital signal demodulator
09/26/1989US4870645 Single syndrome generator for forward and reverse read of high density magnetic tape and method therefor
09/26/1989US4870643 Parallel drive array storage system
09/26/1989US4870634 Apparatus for recording and/or reproducing information data and a signal for synchronizing the same
09/26/1989US4870633 Apparatus for reproducing information recorded on a recording medium
09/26/1989US4870513 Method and arrangement for the recording and playback of data
09/26/1989US4870512 Data recording and reproducing device
09/26/1989US4870511 Device for demodulating a frequency-modulated signal
09/26/1989US4870509 Compact video signal recording and/or reproducing apparatus adapted for external input video signals and variable speed reproduction
09/26/1989US4870507 Video tape recorder system
09/26/1989US4870414 Even mark modulation coding method
09/26/1989CA1261965A1 Video signal recording apparatus
09/26/1989CA1261056A1 Video translation system for translating a binary coded data signal into a video signal and vice versa
09/26/1989CA1260145A1 Synchronizing signal decoding
09/26/1989CA1260137A1 Track jump servo system for disc players
09/21/1989WO1989008915A1 Digital data security system
09/20/1989EP0333592A2 Data reproducing circuit for memory system and having equalizer generating two different equalizing signals used for data reproduction
09/20/1989EP0333324A2 Matched spectral null trellis codes for partial response channels
09/20/1989EP0333322A2 Input coding for partial response channels
09/20/1989EP0333321A2 Even mark modulation coding
09/20/1989EP0333165A2 System for managing recording areas on writable type optical disk
09/20/1989EP0333006A2 Recording apparatus
09/20/1989EP0332777A2 Data recording and reproducing device
09/20/1989EP0332776A2 Data reproducing device
09/19/1989US4868922 Data modulation/demodulation system utilizing demodulation clocks that differ in phase
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