| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 08/02/1977 | US4040099 Method and apparatus for preparing recorded program material to render detectable unauthorized magnetic tape duplications, and method and apparatus for detecting such duplications |
| 08/02/1977 | US4040022 Missing clock detection circuit |
| 07/26/1977 | US4038686 Defect detection and compensation |
| 07/19/1977 | US4037257 Data clock separator with missing clock detect |
| 07/12/1977 | US4035623 Security cards |
| 07/12/1977 | US4035579 Pulse-code modulated video reproducer utilizing linear arrayed lenses |
| 07/05/1977 | US4034397 Pilot signal luminance correction means for video recording apparatus |
| 07/05/1977 | US4034348 Apparatus, including delay means, for sampling and recovering data recorded by the double transition recording technique |
| 07/05/1977 | US4034309 Apparatus and method for phase synchronization |
| 06/28/1977 | US4032979 Method and system for encoding and decoding digital data |
| 06/28/1977 | US4032966 Drop out compensation device |
| 06/28/1977 | US4032915 Speed-tolerant digital decoding system |
| 06/21/1977 | US4031548 Plural receiving and recording television system |
| 06/14/1977 | US4030129 Pulse code modulated digital audio system |
| 06/14/1977 | US4030128 Video record scrambling and unscrambling |
| 06/14/1977 | US4029944 Data transducer |
| 06/07/1977 | US4028535 Apparatus and method for generating a data code with a spectral null |
| 06/07/1977 | US4027952 Single optical lens with large aperture and large field |
| 05/31/1977 | US4027335 DC free encoding for data transmission system |
| 05/31/1977 | US4027267 Method of decoding data content of F2F and phase shift encoded data streams |
| 05/31/1977 | US4027178 Circuit for generating synchronization signals |
| 05/31/1977 | US4027152 Apparatus and method for transmitting binary-coded information |
| 05/24/1977 | US4025958 Jitter prevention system for video signal processing |
| 05/17/1977 | US4024571 Synchronizing system employing burst crossover detection |
| 05/17/1977 | US4024498 Apparatus for dead track recovery |
| 05/10/1977 | US4023203 System for compensating a phase difference between magnetic tracks in a magnetic recorded information regenerating apparatus |
| 05/10/1977 | US4022986 Playback unit for a long-playing record of a time division multiplexed audio signal |
| 05/03/1977 | US4021853 Method and apparatus for the magnetic storage of digital data |
| 05/03/1977 | US4021852 Signal defect compensation |
| 04/26/1977 | US4020364 Resistance read amplifier |
| 04/26/1977 | US4020282 High density data processing system |
| 04/19/1977 | US4019206 Method and apparatus for magnetic recording of data with a recording head having a plurality of physically parallel, serially connectable conductors |
| 04/12/1977 | US4017903 Pulse code modulation recording and/or reproducing system |
| 04/12/1977 | US4017895 Method of detecting defects in read out signals, and apparatus for implementing the same |
| 04/12/1977 | US4017806 Phase locked oscillator |
| 04/12/1977 | US4017803 Data recovery system resistant to frequency deviations |
| 04/12/1977 | US4017677 Squelch circuit for a video record player |
| 04/05/1977 | USRE29171 Multi-directional sound system |
| 04/05/1977 | US4016603 Disk storage apparatus having signals recorded in a specific format |
| 04/05/1977 | US4016599 Anti-shouldering read circuit for magnetic disk memory |
| 04/05/1977 | US4016547 Mos shift register compensation system for defective tracks of drum storage system |
| 04/05/1977 | US4016374 Multichannel record disc recording system with signal level control |
| 03/29/1977 | US4015290 Low power recording instrument with two or more tracks |
| 03/29/1977 | US4015288 Write clock generator for digital time base corrector |
| 03/29/1977 | US4015252 High speed serial data synchronization scheme |
| 03/29/1977 | US4015076 Noise eliminating circuit for video television signal |
| 03/15/1977 | US4012786 Magnetic data decoder |
| 03/15/1977 | US4012785 Magnetic recording playback circuit |
| 03/15/1977 | US4012784 Voice logging recorder including decks dedicated for both logging and recall operations |
| 03/15/1977 | US4012774 Drop-out responsive color video reproducing apparatus |
| 03/15/1977 | US4012697 Clock signal extraction during playback of a self-clocking digital recording |
| 03/01/1977 | US4010490 Video recording and reproducing apparatus with crosstalk reduction |
| 02/22/1977 | US4009490 PLO phase detector and corrector |
| 02/15/1977 | US4008488 Magnetic recording data decoding system |
| 02/08/1977 | US4007485 Color video signal reproducing apparatus |
| 02/08/1977 | US4007483 Circuit for processing a color television signal prior to magnetic recording and corresponding restoring circuit |
| 02/01/1977 | US4006455 Error correction system in a programmable calculator |
| 02/01/1977 | US4006295 Method of detecting defects in signals corresponding to the read-out of a data carrier and system for implementing such a method |
| 01/25/1977 | US4005483 Automatic record control apparatus with multichannel memory |
| 01/25/1977 | US4005479 Phase locked circuits |
| 01/25/1977 | US4005478 Process and arrangement for representing digital data by binary signals |
| 01/25/1977 | US4005477 Phase equalized readback apparatus and methods |
| 01/25/1977 | US4005476 Circuit for compensating time errors in a television signal, particularly from a recording instrument |
| 01/18/1977 | US4004134 Off-line magnetic card reader system operable as though normally on line |
| 01/11/1977 | US4003087 Player |
| 01/11/1977 | US4003086 Dynamic loop gain alteration for data retrieval |
| 01/11/1977 | US4003085 Self-clocking, error correcting low bandwidth digital recording system |
| 01/11/1977 | US4003084 Method of and means for testing a tape record/playback system |
| 01/11/1977 | US4003083 Digital data recording and decoding |
| 01/11/1977 | US4003027 Arrangement for varying the rate of recording of information |
| 01/04/1977 | US4001884 Apparatus and method for recording and reproducing digital-data |
| 01/04/1977 | US4001883 High density data storage on magnetic disk |
| 01/04/1977 | US4001811 Method and apparatus for coding and decoding digital information |
| 01/04/1977 | US4001732 Calibration oscillators for noise reduction systems |
| 01/04/1977 | US4001563 Communication system for disseminating coded digital data in analogue form utilizing an orthogonal transformation |
| 12/28/1976 | US4000513 Apparatus and method for data recording with peak shift compensation |
| 12/28/1976 | US4000512 Width modulated magnetic recording |
| 12/28/1976 | US4000511 Device for the compensation of drop-outs in a angle-velocity modulated signal |
| 12/21/1976 | US3999218 Video signal recording and reproducing apparatus for stop motion picture |
| 12/14/1976 | US3997915 Frequency modulating and demodulating method and apparatus |
| 12/14/1976 | US3997913 Electronic time compressor/expander utilizing magnetic storage |
| 12/14/1976 | US3997876 Apparatus and method for avoiding defects in the recording medium within a peripheral storage system |
| 12/14/1976 | US3997798 Or pulse gaps whose duration is shorter than a given test period t(p) from a sequence of digital pulses present at the input end |
| 12/07/1976 | US3996614 Device for reading a magnetized record carrier |
| 12/07/1976 | US3996613 Data recording and transmission apparatus utilizing non-consecutive zero coding |
| 12/07/1976 | US3996612 Test code generator |
| 12/07/1976 | US3996586 Magnetic tape pulse width to digital convertor |
| 12/07/1976 | US3996558 Error detection and recovery from magnetic tape |
| 11/30/1976 | US3995264 Apparatus for encoding and decoding binary data in a modified zero modulation data code |
| 11/23/1976 | US3994014 Circuit for rewriting blocks of phase encoded data |
| 11/16/1976 | US3992719 Video signal recording/reproducing apparatus wherein the phase of the recorded signal is synchronized with the scanning head |
| 11/09/1976 | US3991389 Digital frequency shift key modulator |
| 11/02/1976 | US3989903 Multi-directional sound signal recording and/or reproducing system with crosstalk compensation means |
| 11/02/1976 | US3989893 Reproducing apparatus with drop out suppression circuit for audio and video signals |
| 10/26/1976 | US3988688 Demodulator for binary-phase modulated signals having a variable clock rate |
| 10/19/1976 | US3987490 Rotating read/write system for NRZI data |
| 10/19/1976 | US3987484 Programmed presentation system |
| 10/19/1976 | US3987256 Grooved record playback system with multiple transducers |
| 10/12/1976 | US3986125 Phase detector having a 360 linear range for periodic and aperiodic input pulse streams |
| 10/12/1976 | US3985978 Method and apparatus for control of FM beat distortion |