| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 05/27/1981 | EP0029216A1 Data transmission device with a buffer memory and devices for data protection |
| 05/27/1981 | EP0029215A1 Data transmission device with a buffer memory and device for data protection |
| 05/19/1981 | US4268905 Autonomous fault diagnosis for disk drive using an internal microprocessor |
| 05/12/1981 | US4267595 AMI Decoder apparatus |
| 05/12/1981 | CA1101082A1 Apparatus and method for timing recovery from a pseudo-ternary signal |
| 05/06/1981 | EP0027900A1 Improved decoding method and system for ETAB bar code |
| 05/05/1981 | US4266244 System for detecting the initial point of a digital signal in a composite digital signal reproducing system |
| 05/05/1981 | US4266204 Delay line signal equalizer for magnetic recording signal detection circuits |
| 04/30/1981 | WO1981001226A1 Self synchronizing clock derivation circuit for double frequency encoded digital data |
| 04/30/1981 | WO1981001225A1 Clock derivation circuit for double frequency encoded serial digital data |
| 04/29/1981 | EP0027547A1 Data signal detection apparatus |
| 04/28/1981 | US4264934 Rate adaptive writer for a card having a magnetizable surface |
| 04/21/1981 | US4263656 Visual sighting system |
| 04/14/1981 | CA1099403A1 Vertical synchronizing signal detector for television video signal reception |
| 04/14/1981 | CA1099398A1 Apparatus for eliminating time base errors from an information signal |
| 04/14/1981 | CA1099397A1 Time base correction of color video signal from playback apparatus |
| 04/14/1981 | CA1099396A1 Method and apparatus for reproducing signals from a rotating record medium and method and apparatus for making same |
| 04/14/1981 | CA1099395A1 Video signal processing circuit |
| 04/08/1981 | EP0026699A1 Method and device for coding digital data, device for decoding digital data and a transmission system comprising such a device |
| 04/08/1981 | EP0026320A1 Data recorder/reader and method of operating same |
| 04/07/1981 | US4261019 Compatible digital magnetic recording system |
| 04/07/1981 | US4260952 Circuit for decoding a diphase signal |
| 04/07/1981 | CA1099023A1 Method and system for transmitting and receiving interleaved blocks of encoded data words to minimize error distortion in the recovery of said data words |
| 04/01/1981 | EP0025885A1 Magnetic recording system |
| 03/24/1981 | US4258402 Small size tape recorder with adapter |
| 03/24/1981 | US4258398 Apparatus for preventing flutter and skew in electrical signals |
| 03/24/1981 | US4258389 Circuit for forming a vertical synchronizing signal |
| 03/17/1981 | US4257098 Computer to recording medium interface |
| 03/17/1981 | US4257073 Quasi-vertical synchronizing signal generator |
| 03/17/1981 | CA1097819A1 Digital signal transmission method |
| 03/17/1981 | CA1097807A1 Data transducer |
| 03/17/1981 | CA1097800A1 Magnetic data decoder |
| 03/17/1981 | CA1097750A1 Dual channel signal detector circuit |
| 03/11/1981 | EP0024858A2 Video record disc and playback apparatus and method for it |
| 03/11/1981 | EP0024390A1 Noise reduction apparatus |
| 03/04/1981 | EP0024295A1 Apparatus for decoding diphase input signals |
| 03/03/1981 | US4254500 Single track digital recorder and circuit for use therein having error correction |
| 03/03/1981 | US4254441 Digital code reader |
| 02/24/1981 | US4253187 Method and apparatus for sequencing two digital signals |
| 02/24/1981 | US4253115 Process for the transmission of an audiofrequency analog signal during line-frame synchronization intervals of a television signal and apparatus for performing this process |
| 02/24/1981 | CA1096490A1 Clock generator for video signal processing |
| 02/17/1981 | CA1096037A1 Dynamic deskewing for a rotating head recording device |
| 02/11/1981 | EP0023783A1 Data recovery circuit |
| 02/10/1981 | US4250470 Syllabic compander with logarithmic chain |
| 02/03/1981 | US4249198 Phase locking system for television signals |
| 02/03/1981 | CA1095166A1 Device for transmitting digital information |
| 02/03/1981 | CA1095164A1 Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof |
| 01/27/1981 | US4247760 Method and circuit arrangement for generating and processing two separate pulse trains bearing information |
| 01/22/1981 | WO1981000160A1 Apparatus and an improved method for processing of digital information |
| 01/20/1981 | US4246617 Digital system for changing the rate of recorded speech |
| 01/20/1981 | US4246615 System for recording and/or reproducing an audio signal which has been converted into a digital signal |
| 01/20/1981 | US4246545 Data signal responsive phase locked loop using averaging and initializing techniques |
| 01/20/1981 | CA1094219A1 Noise reduction circuit for multiple gap magnetic head for automatic typewriter |
| 01/13/1981 | USRE30482 Pulse code modulated digital audio system |
| 01/13/1981 | US4245264 Apparatus and method for digitally synchronizing the timing of a sequence of electrical output pulses in accordance with a selectable, permissably non-linear function of the timing of a sequence of electrical input pulses |
| 01/13/1981 | US4245263 Write precompensation and write encoding for FM and MFM recording |
| 01/13/1981 | US4245262 Dropout compensating device |
| 01/13/1981 | US4245234 Method of recording color television signals as a repetitive series of normally recorded lines and phase reversed lines |
| 01/13/1981 | US4245170 Detector |
| 01/13/1981 | US4245152 Decoding method and system for ETAB bar code |
| 01/13/1981 | CA1093687A1 Playback apparatus |
| 01/13/1981 | CA1093685A1 Control circuit for use with a time-compression/time- expansion system in a pulse signal record/playback device |
| 01/07/1981 | EP0021971A1 Method of checking the reproduction of a sound recording by associating an auxilary signal to said recording |
| 01/07/1981 | EP0021411A1 Optical disk and optical information processor |
| 01/07/1981 | EP0020531A1 Error recognition and correction of digital information |
| 01/06/1981 | US4244008 Read back compensation circuit for a magnetic recording device |
| 01/06/1981 | US4243944 Circuit for automatic dynamic compression or expansion |
| 12/30/1980 | CA1092705A1 System and method for attaching magnetic storage devices having dissimilar track capacities and track formats |
| 12/30/1980 | CA1092704A1 Apparatus for recording and reproducing video signals on a magnetic tape movable at different speeds |
| 12/16/1980 | CA1152182B Dc-free encoding for data transmission system |
| 12/16/1980 | CA1091806A1 Magnetic coding process |
| 12/10/1980 | EP0019924A1 Method and apparatus for recording data signals on a recording medium |
| 12/10/1980 | EP0019799A2 Apparatus for registering working condition data, in particular of a vehicle |
| 12/09/1980 | US4238852 Error correcting system |
| 12/09/1980 | US4238843 Disc-shaped optically readable record carrier used as a data storage medium |
| 12/09/1980 | US4238777 Drop-out detecting system for video recording magnetic tape |
| 12/09/1980 | US4238770 Vertical synchronizing signal detector circuit |
| 12/09/1980 | CA1091348A1 Method and apparatus for increasing the recording capacity of a disc |
| 12/02/1980 | US4237499 Video tape control time code reading |
| 12/02/1980 | US4237498 Method of addressing and/or locating information on a record carrier |
| 12/02/1980 | US4237496 Device for coding/decoding data for a medium |
| 12/02/1980 | CA1152181B Decoding apparatus and method for d.c. free data transmission system |
| 12/02/1980 | CA1090707A1 Adaptive filter for companding system |
| 11/26/1980 | EP0019503A1 Method of coding the digital indexing signals of images stored on a record carrier, device for reading the signals so coded and apparatus for transmitting audiovisual signals comprising such a device |
| 11/25/1980 | CA1090468A1 Magnetic recording and/or reproducing apparatus |
| 11/18/1980 | US4234898 Digital magnetic recording and reproducing apparatus |
| 11/18/1980 | US4234897 DC Free encoding for data transmission |
| 11/18/1980 | US4234896 PCM Recording and reproducing system |
| 11/18/1980 | US4234853 Automatic level control circuit |
| 11/18/1980 | CA1089993A1 Apparatus and method for generating a data code with a spectral null |
| 11/18/1980 | CA1089772A1 Circuitry for compression of silence in dictation speech recording |
| 11/11/1980 | US4233627 Signal multiplexing system |
| 11/11/1980 | US4233621 Method and apparatus for recording and reproducing a color-aligned line-sequential color video signal |
| 11/04/1980 | US4232347 Video tape control time code reading |
| 11/04/1980 | US4232340 Defect compensation for color television |
| 11/04/1980 | CA1089029A1 Clock pulse signal generator having automatic frequency control circuit |
| 10/30/1980 | WO1980002341A1 Rate adaptive writer for a magnetizable surface |
| 10/29/1980 | EP0018157A1 High storage density disc file |
| 10/29/1980 | EP0017803A1 Method of editing or cross-fading without interfering noise, two digital signal sequences, particularly of audio signals |
| 10/28/1980 | US4231071 Reader for data recorded on magnetic disks at plural densities |