| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 03/20/1990 | US4910780 Audio signal recording and reproducing apparatus utilizing digital data compression and extension |
| 03/20/1990 | US4910736 Encoding method and apparatus for recording data with an identification code and an error check code |
| 03/20/1990 | US4910725 Optical recording method for data cards |
| 03/20/1990 | US4910625 Article surveillance apparatus and systems for computer data disks |
| 03/20/1990 | US4910614 Disk controller for a plurality of magnetic disk drives |
| 03/20/1990 | US4910517 Digital data detector |
| 03/20/1990 | US4910515 Digital signal processing circuit |
| 03/20/1990 | US4910479 Automatic gain control device for use in an optical memory device |
| 03/15/1990 | DE3828519A1 Data disk with shutter |
| 03/13/1990 | US4908826 Stored data error correction system |
| 03/13/1990 | US4908811 Method and apparatus for data recording and reproducing with error reduction |
| 03/13/1990 | US4908793 Storage apparatus including a semiconductor memory and a disk drive |
| 03/13/1990 | US4908771 Method of, and apparatus for, processing distorted pulsed signals |
| 03/13/1990 | US4908722 Digital magnetic recording/reproduction apparatus and method |
| 03/13/1990 | US4908721 Improved decoder |
| 03/13/1990 | CA1266718A1 Recovery of stored data from mutilated tape data blocks |
| 03/08/1990 | WO1990002402A1 Training method and apparatus with audio and digital signals recording and play back |
| 03/08/1990 | WO1990002401A1 Method and apparatus for reproduction |
| 03/08/1990 | DE3927661A1 Reduction of cylinder size in digital audio tape equipment - using upper and lower drum of reduced dia. with heads mounted on reduced dia. cylinder |
| 03/08/1990 | DE3828573A1 Method of protecting computer programs from illegal use |
| 03/07/1990 | EP0357464A2 Information recording and reproducing apparatus using optical discs |
| 03/07/1990 | EP0357419A2 Optical data recording and readout apparatus |
| 03/07/1990 | EP0357230A2 Digital video tape recorder |
| 03/07/1990 | EP0357218A2 Apparatus for playback of magnetically recorded data having a variable input rate |
| 03/07/1990 | EP0357049A2 Information recording medium and recording/reproducing apparatus using the same |
| 03/07/1990 | EP0357046A2 Signal processing device for analogue to digital conversion |
| 03/07/1990 | EP0356995A2 Apparatus for supplying control codes to sound field reproduction apparatus |
| 03/07/1990 | EP0356938A2 Rotary head assembly for substantially concurrent recording and monitoring of data on a magnetic tape cassette or the like |
| 03/07/1990 | EP0356763A2 Apparatus and method of accessing a medium with low power consumption |
| 03/07/1990 | EP0179920B1 Apparatus for recording data signals |
| 03/07/1990 | EP0164131B1 Information recording medium disc and method and apparatus for recording/reproducing information |
| 03/07/1990 | CN1040282A Reproducing and/or recording apparatus |
| 03/07/1990 | CN1007113B Digital data converting method and apparatus thereof |
| 03/06/1990 | US4907226 Disk write error recovery system |
| 03/06/1990 | US4907215 Integral optical recording of product code in data areas |
| 03/06/1990 | US4907213 Compact-disk player arrangement for reading out a table of contents after insertion of a compact disk |
| 03/06/1990 | US4907195 Method of and system for atomic scale recording of information |
| 03/06/1990 | US4907181 Test and monitoring system for a digital video tape recorder/reproducer |
| 03/06/1990 | US4907101 Method and apparatus for digital data transmission and/or recording and playback |
| 03/06/1990 | US4907100 Readout circuit in magnetic recording device |
| 03/06/1990 | US4907093 Method and apparatus for preventing the copying of a video program |
| 03/06/1990 | US4907092 Modulating/demodulating circuit for multiplex recording/playback of data in a magnetic recording/playback system |
| 03/06/1990 | US4906941 Digital phase locked loop circuit |
| 03/06/1990 | US4906874 Analog signal switching device for use in an optical memory |
| 02/28/1990 | EP0355999A2 Encoding/decoding system for optical recording/reading |
| 02/28/1990 | EP0355919A1 Device for synchronizing on digital data packets, and playback device comprising the same |
| 02/28/1990 | EP0355620A2 Optical card |
| 02/28/1990 | EP0139757B1 Apparatus for reproducing data signal |
| 02/27/1990 | US4905104 Rotary head type digital signal recording and/or reproducing apparatus for recording and/or reproducing with a variable speed |
| 02/27/1990 | US4905102 System for processing signals reproduced from a digital magnetic record in a recorder-reproducer |
| 02/27/1990 | US4905100 Magnetic recorder/reproducer |
| 02/27/1990 | US4905099 Intermediate picture field storage system for variable speed magnetic tape video data read-out |
| 02/27/1990 | US4904938 Method and apparatus for testing characteristics of a floppy disc and a floppy disc drive |
| 02/22/1990 | WO1990001850A1 Dual deck videocassette recorder system |
| 02/22/1990 | WO1990001737A1 Single disk emulation for synchronous disk array |
| 02/20/1990 | US4903198 Method for substituting replacement tracks for defective tracks in disc memory systems |
| 02/20/1990 | US4903195 Method for controlling data transfer |
| 02/20/1990 | US4903150 Multitrack magnetic recording and reproducing apparatus and method of controlling tracking of multitrack magnetic heads |
| 02/20/1990 | US4903148 Digital signal editing apparatus |
| 02/20/1990 | US4903020 Method and apparatus for digitally processing stored compressed analog signals |
| 02/20/1990 | CA1266123A1 System and method for reading data record stripes on data cards |
| 02/13/1990 | US4901318 Address generating circuit |
| 02/13/1990 | US4901301 Region detection system for detecting empty sectors on a recording medium |
| 02/13/1990 | US4901300 Method of and apparatus for recording an information signal |
| 02/13/1990 | US4901294 Electronic time measuring apparatus including acoustic data recording/reproducing functions |
| 02/13/1990 | US4901168 Apparatus and method for recording and reproducing a digital signal |
| 02/13/1990 | US4901119 Video signal recording and/or reproducing apparatus |
| 02/08/1990 | WO1990001194A1 Process for organizing and reading a magnetic support and support therefor |
| 02/08/1990 | DE3921017A1 Einrichtung zur wiedergabe digitaler mehrkanal-signale Device for playback of digital multi-channel signals |
| 02/07/1990 | EP0354065A2 Digital data modulation circuit and method and digital data demodulation circuit |
| 02/07/1990 | EP0354059A2 Method and apparatus for removing data stream timing variations |
| 02/07/1990 | EP0353852A2 Method and circuitry to suppress additive disturbances in data channels containing MR sensors |
| 02/07/1990 | EP0353815A2 Magnetic-tape cassette apparatus with a drive mechanism for playing back magnetic-tape cassettes |
| 02/07/1990 | EP0353758A2 Video data recording apparatus for recording search data |
| 02/07/1990 | EP0353757A2 Information transmission system with record/reproducing device |
| 02/07/1990 | EP0353274A1 Synchronization for stored data. |
| 02/06/1990 | US4899232 Apparatus for recording and/or reproducing digital data information |
| 02/06/1990 | US4899146 Method of and apparatus for converting digital data between data formats |
| 02/06/1990 | CA1265621A1 Decoding apparatus |
| 02/06/1990 | CA1265614A1 Apparatus employing adjustable modulation index for reducing cross talk between recorded audio and video signals |
| 02/06/1990 | CA1265613A1 Signal recording apparatus and method |
| 02/06/1990 | CA1265612A1 Sector identification method for hard sectored hard files |
| 01/30/1990 | US4897840 Method and apparatus for controlling the error correction within a data transmission controller given data read from moving peripheral storages, particularly disk storages, of a data processing system |
| 01/30/1990 | US4897741 Signal recording apparatus |
| 01/30/1990 | US4897740 Recording/reproducing system for a magnetic recording medium including synchronization detecting circuit |
| 01/30/1990 | US4897738 Circuit for generating a frequency-modulated signal indicative of data to be recorded onto magnetic tape |
| 01/30/1990 | US4897653 Data outputting circuit |
| 01/30/1990 | CA1265253A1 Self-checking error-correcting encoder/decoder |
| 01/30/1990 | CA1265250A1 Data transmission |
| 01/30/1990 | CA1265239A1 Methods of recording and reproducing audio signals |
| 01/25/1990 | WO1990000847A1 System and process for vcr scheduling |
| 01/25/1990 | WO1990000771A1 Data security device |
| 01/25/1990 | DE3803982A1 Data carrier with duplication prevention |
| 01/24/1990 | EP0351845A2 FM audio record reproducing apparatus |
| 01/24/1990 | EP0351637A1 Method of organizing and reading a magnetic medium, and medium using the method |
| 01/23/1990 | US4896362 System for subband coding of a digital audio signal |
| 01/23/1990 | US4896337 Adjustable frequency signal generator system with incremental control |
| 01/23/1990 | US4896311 Disk apparatus |
| 01/23/1990 | US4896025 Information reproducing apparatus for information recording medium having a plurality of information tracks |
| 01/23/1990 | CA1264851A1 Method and apparatus for recording a digital signal |