Patents
Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980)
01/1986
01/28/1986US4567464 Fixed rate constrained channel code generating and recovery method and means having spectral nulls for pilot signal insertion
01/28/1986US4567448 Variable frequency oscillator
01/28/1986EP0090040A4 Disk format for secondary storage system.
01/28/1986CA1200013A1 Digital to analog converter
01/28/1986CA1200007A1 Subscription television system
01/22/1986EP0169137A1 Method for storing on a disc several series of data for different users, and disc manufactured by this method
01/22/1986EP0169013A2 Video signal recording and reproducing apparatus
01/22/1986EP0168793A1 Method and apparatus for decoding
01/22/1986EP0077740B1 Magnetic disc device
01/21/1986US4566092 Process and device for generating synchronizing signals in an optical data carrier write-read apparatus
01/21/1986US4566091 Process and device for regenerating the phase of synchronizing signals in a data carrier optical write-read apparatus
01/21/1986US4566044 Direction-constrained ternary codes using peak and polarity detection
01/15/1986EP0168291A1 Analogous device for storing a picture using charge transfer
01/15/1986EP0168155A1 Method for testing components of a magnetic storage system
01/15/1986EP0168076A1 Interface circuit of the slave type
01/15/1986EP0167826A2 Diskette drive and media type determination mechanism
01/15/1986EP0167806A1 Handling of media defects of mass storage discs
01/14/1986US4564945 Error-correction code for digital data on video disc
01/14/1986US4564941 Error detection system
01/14/1986US4564914 Method for machining three dimensional contours utilizing a numerically controlled lathe
01/14/1986US4564870 Signal detector of magnetic disk apparatus
01/14/1986US4564869 Zoned equalization for a magnetic disc
01/14/1986CA1199411A1 Syndrome processing unit for multibyte error correcting system
01/08/1986EP0167284A1 Method for testing components of a magnetic storage system
01/08/1986EP0167093A2 Multiple system disk
01/08/1986EP0166785A1 Disk reproducing apparatus
01/08/1986EP0166749A1 Phase regulation circuit.
01/02/1986EP0166373A1 Disk subsystem read write control
01/02/1986EP0166310A2 Data processing system
01/02/1986EP0166023A2 Method and system for data compression and restoration
12/1985
12/31/1985US4562582 Burst signal receiving apparatus
12/31/1985US4562578 Method for data transmission
12/31/1985US4562577 Shared encoder/decoder circuits for use with error correction codes of an optical disk system
12/31/1985US4562549 Digital player using a pulse width detector
12/31/1985US4562495 Multiple system disk
12/31/1985US4562492 Noise reduction circuit
12/31/1985US4562491 Multichannel digital magnetic recording apparatus
12/31/1985US4562490 Jackpot-resistant magnetic card encoding
12/31/1985US4562489 Apparatus for recording of digital data
12/31/1985US4562488 Device for reproduced sound pitch modification in a tape player
12/27/1985EP0165320A1 Disk-shaped recording medium and apparatus for reproducing the same
12/24/1985US4561083 Memory circuit write-in system
12/24/1985US4561027 Rotating D.C. coupled record amplifier for digital magnetic recording
12/24/1985US4561026 Reproducing apparatus for reproducing recorded signals from a rotary recording medium
12/24/1985CA1198517A1 Disc players
12/24/1985CA1198516A1 Data reproducing apparatus for reproducing digital data recorded on multi-tracks
12/24/1985CA1198515A1 Method and apparatus for recording digital information in alternate recording tracks
12/19/1985WO1985005747A1 Digital signal transmission device
12/19/1985WO1985005723A1 Process for reducing the noticeability of errors in a digital audio signal
12/19/1985WO1985005719A1 Self-timed runout correction pattern
12/18/1985EP0164891A1 Methods of and apparatus for use in decoding digital data
12/18/1985EP0164746A2 Optical information recording and reproducing apparatus and optical disc
12/18/1985EP0164723A2 Apparatus for regenerating original signals
12/17/1985US4559568 Apparatus for re-recording a digital signal on a record medium and for reproducing the same therefrom
12/17/1985US4559567 Apparatus for recording and/or reproducing video and audio signals
12/17/1985US4559566 FM demodulating circuit having an insensitive frequency point
12/11/1985EP0164253A1 Sound reproducing apparatus
12/11/1985EP0164131A2 Information recording medium disc and method and apparatus for recording/reproducing information
12/11/1985EP0164027A2 Method and apparatus for coding digital data to permit correction of one or two incorrect data packets (bytes)
12/11/1985EP0163736A1 Apparatus for processing pcm signal
12/10/1985US4558446 Memory system
12/10/1985US4558441 Data recording and reproducing apparatus and method
12/10/1985US4558380 Digital tape transport for selectively recording in either a parallel or serial mode
12/10/1985US4558378 Method and apparatus for a magnetic recording/reproducing
12/10/1985US4558377 Digital television apparatus
12/10/1985US4558362 Digital video signal transmitting apparatus
12/10/1985US4558302 High speed data compression and decompression apparatus and method
12/10/1985US4558213 Pickup level control device for a system for reading out recorded information
12/04/1985EP0163504A2 Video apparatus for correcting time-base errors and for compensating drop-outs
12/04/1985EP0163481A2 Disc drive control apparatus for recording and/or reproducing digital data
12/04/1985EP0163428A1 Rotary head type magnetic recording and/or reproducing apparatus
12/03/1985US4556983 Method and apparatus for pre-emphasis counteraction of variations in amplitude of received or reproduced serial binary signals
12/03/1985US4556917 Magnetic recording/reproducing apparatus for video and sound
12/03/1985US4556869 Multi-function data signal processing method and apparatus
12/03/1985CA1197589A1 Coded data on a record carrier and method for encoding same
11/1985
11/27/1985EP0162689A2 Magnetic disc reproducing apparatus
11/27/1985EP0162635A2 Signal simulator for magnetic recording head
11/27/1985EP0162558A2 Method and apparatus for generating a run length limited code
11/27/1985EP0162454A2 Single revolution disk sector formatter
11/27/1985EP0162407A1 Method and device for determining error signals in a disc drive and test magnetic disc therefor
11/27/1985EP0162071A1 Antipiracy device and method for cinematographic and video carriers
11/26/1985US4555737 Method of providing smooth transition from one to another of two sequences of digitally coded sound signals (fading)
11/26/1985US4555734 Video time base and drop out corrector
11/26/1985US4555679 Detection circuit for detecting synchronous and asynchronous states in a phase-locked loop circuit
11/21/1985WO1985005211A1 System for correcting error in digital data
11/21/1985WO1985005210A1 Process and circuit for storing frequency-modulated signals
11/21/1985WO1985005200A1 Magnetic stripe and wand reader interface
11/21/1985EP0161496A1 Digital magnetic recording circuit
11/21/1985EP0119201A4 An improved automatic head position tracking servo for a rotary head magnetic tape recording and reproducing apparatus.
11/19/1985US4554654 Optical memory device with means for detecting erroneous data writing
11/19/1985US4554652 Optical information processor
11/19/1985US4554598 Single revolution disk sector formatter
11/19/1985US4554597 Write-in and read-out control apparatus
11/19/1985US4554529 Method for converting binary data train
11/12/1985US4553178 Magnetic recording system with peak shift compensation
11/12/1985US4553177 Method and apparatus for recording data
11/12/1985US4553131 Method and apparatus for encoding a binary data stream into a binary code stream
11/12/1985US4553130 Variable-length encoding-decoding system
11/07/1985WO1985004979A1 Apparatus for recording data signals
11/06/1985EP0160549A2 Circuit for producing a video combine from multiple video images