| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 03/13/1991 | EP0416563A2 Rotary head type magnetic tape recording and reproducing apparatus |
| 03/13/1991 | EP0416445A2 High performance file system |
| 03/13/1991 | CN1049928A 数字信号处理系统 Digital signal processing system |
| 03/12/1991 | US4999828 Record carrier decoder for multi-track data patterns including error protection data |
| 03/12/1991 | US4999722 Multi-channel information signal reproducing apparatus for reproducing information signals from a tape-shaped record bearing medium having a plurality of areas which respectively extend longitudinally and parallel with each other |
| 03/12/1991 | US4999720 Zone density sector counter |
| 03/12/1991 | CA1281424C Modular data storage directories for large-capacity data storage units |
| 03/12/1991 | CA1281384C Digital limiting circuit |
| 03/07/1991 | WO1991003106A1 Process and circuit for producing parity symbols |
| 03/07/1991 | DE3928676A1 Schaltung zur erkennung eines nutzsignals in einem binaeren signal Circuit for detecting a useful signal in a binary signal |
| 03/06/1991 | EP0415853A2 Digital data transmission system having error detecting and correcting function |
| 03/06/1991 | EP0415834A2 Signal reproducing apparatus |
| 03/06/1991 | EP0415699A2 Digital video signal recorder and reproducer |
| 03/06/1991 | EP0415518A2 Signal recording apparatus and signal reproducing apparatus |
| 03/06/1991 | EP0415474A1 Device for optimising the operating range of an A/D converter |
| 03/06/1991 | EP0415108A2 Method of and apparatus for correcting the phase of a playback clock signal |
| 03/06/1991 | CN1049741A Video and audio tape and its prodn. method |
| 03/05/1991 | US4998252 Method and apparatus for transmitting digital data |
| 03/05/1991 | US4998009 Information recording method for recording data and directories in a plurality of blocks comprising divided recording areas |
| 03/05/1991 | CA1281130C Data transmission method suitable for a disc |
| 03/01/1991 | WO1991003813A1 Improved decoder circuit |
| 03/01/1991 | CA2056980A1 Decoder circuit |
| 02/28/1991 | DE3927527A1 Verfahren zur erzeugung von paritaetssymbolen und schaltungsanordnung zur durchfuehrung des verfahrens Process for the production of paritaetssymbolen and circuit arrangement for implementing the method |
| 02/27/1991 | EP0414548A2 Low frequency restorer |
| 02/27/1991 | EP0414524A2 Multiple zone audio system |
| 02/27/1991 | EP0414518A2 Optical recording medium and method of and apparatus for recording and reproducing information therein |
| 02/27/1991 | EP0414517A2 Optical disc recording apparatus and method |
| 02/27/1991 | EP0414516A2 Optical recording medium |
| 02/27/1991 | EP0414310A1 Information recording and read device, information recording device, and record carrier obtained by means of one of the devices |
| 02/27/1991 | EP0237535B1 Self-testing peripheral controller system for multiple disk drive modules |
| 02/27/1991 | EP0216813B1 Data transmission |
| 02/27/1991 | EP0134817B1 Method of transferring digital signal |
| 02/26/1991 | WO1991003046A1 Optical recording medium, data recording method and data reproducing method |
| 02/26/1991 | US4996690 Write operation with gating capability |
| 02/26/1991 | US4996681 Integral card for protectively enclosing an optical disk and a visual information bearing area |
| 02/26/1991 | US4996679 Subcode information and block identification system for a disc player |
| 02/26/1991 | US4996610 Disk-type magnetic recording apparatus with video signal discrimination means |
| 02/26/1991 | US4996607 Audio signal recording apparatus |
| 02/26/1991 | CA2023961A1 Optical recording medium |
| 02/25/1991 | CA2023455A1 Multiple zone audio system |
| 02/21/1991 | WO1991002430A1 Digital signal processing system |
| 02/20/1991 | EP0413458A2 Disc player |
| 02/20/1991 | EP0413263A2 Self-timing qualification channel |
| 02/20/1991 | EP0413076A1 Data coding for fast start-up of PRML receivers |
| 02/20/1991 | CN1011751B Method of transmitting update information for a stationary video picture |
| 02/19/1991 | US4995026 Apparatus and method for encoding audio and lighting control data on the same optical disc |
| 02/19/1991 | US4994925 Method of recording and reproducing picture information, recording medium, and recording medium playing apparatus |
| 02/18/1991 | EP0422030A4 Disk drive memory. |
| 02/12/1991 | US4993029 Method and apparatus for randomizing data in a direct access storage device |
| 02/12/1991 | US4993008 Multiple-disk player with automatic fade-out function |
| 02/12/1991 | US4992893 Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus |
| 02/12/1991 | US4992885 Method of recording and reproducing audio information in correlation with divided screen graphics information |
| 02/12/1991 | CA1280208C Method of and device for storing and reading digital information, at option protected or not by an error correcting code |
| 02/12/1991 | CA1280205C Apparatus for reproducing digital data |
| 02/07/1991 | WO1991001554A1 Zone servo sector format alignment scheme for servo and spindle motor control |
| 02/07/1991 | WO1991001547A1 Reader/writer for magnetic cards |
| 02/07/1991 | WO1991001524A1 An error recovery method and apparatus for high performance disk drives |
| 02/06/1991 | EP0411998A2 4-Channel PCM signal processing apparatus |
| 02/06/1991 | EP0411835A2 Decoder apparatus |
| 02/06/1991 | EP0411829A2 Sample data transmission apparatus |
| 02/05/1991 | US4991158 Optical information recording and reproducing apparatus |
| 02/05/1991 | US4991157 Optical information storage apparatus |
| 02/05/1991 | US4991034 DC restoration circuit for restoring and compensating a low frequency component lost in a digital signal |
| 02/05/1991 | US4991033 Signal processing method and device for digital signal reproduction apparatus |
| 02/05/1991 | US4991027 Circuit for detecting a video mode |
| 02/05/1991 | CA1279928C Block pattern detection circuitry |
| 02/05/1991 | CA1279927C Information recording and reproducing apparatus |
| 01/30/1991 | EP0410897A2 Apparatus for reproducing digital signal |
| 01/30/1991 | EP0410722A2 Information transmitting device |
| 01/30/1991 | EP0410626A2 Moving-image recording/reproducing apparatus |
| 01/30/1991 | EP0409861A1 Asynchronous data channel for information storage subsystem |
| 01/30/1991 | EP0186662B1 Self-timed runout correction pattern |
| 01/30/1991 | CN1048945A Method of and device for providing a record carrier with information patterns |
| 01/29/1991 | US4989211 For use with an encoder |
| 01/29/1991 | US4989206 Disk drive memory |
| 01/29/1991 | US4989205 Disk drive memory |
| 01/29/1991 | US4989196 Optical information recording apparatus |
| 01/29/1991 | US4989102 Apparatus for magnetically recording and/or reproducing digital signals in a plurality of modes having different formats |
| 01/23/1991 | EP0409649A2 Information recording and reproducing device |
| 01/23/1991 | EP0409516A2 Apparatus for deriving synchronizing signal from pre-formed marks on record carrier |
| 01/23/1991 | EP0409278A2 Monostable multivibrator |
| 01/22/1991 | US4987500 Self compensating high density data recording and detection scheme |
| 01/22/1991 | US4986668 Information recording and reproducing apparatus with management of defective sector |
| 01/17/1991 | DE3923041A1 Magnetic video tape recorder - transfers head signals via transformer without noise component |
| 01/16/1991 | EP0408343A2 Encoding device and decoding device suitable for dubbing |
| 01/16/1991 | EP0407970A2 Digital video signal reproducing apparatus |
| 01/16/1991 | CN1011268B Method and system for correcting long continuous burst-error |
| 01/15/1991 | US4985782 Reproduction system capable of reproducing a still image by interrupting a sequence of recorded signals |
| 01/15/1991 | US4984901 Magnetic recording disc having sector reference zone, device for reading same, and magnetooptical memory optoelectronic employing said device |
| 01/12/1991 | CA2020688A1 Information record medium playback apparatus |
| 01/11/1991 | WO1991001065A1 Layered protection system for computer's hard disk |
| 01/11/1991 | CA2055606A1 Layered protection system for computer's hard disk |
| 01/10/1991 | WO1991000669A1 Circuit for correcting video signal time-base |
| 01/10/1991 | WO1991000594A1 Method for compensating for the unique mechanical and electrical characteristics of a disc drive |
| 01/10/1991 | DE4011081A1 Simultaneous mixing circuit for video recorder - separates video and speech signals with facility to mix in external source signals |
| 01/09/1991 | EP0407101A2 Error detection and correction system for long burst errors |
| 01/09/1991 | EP0407094A2 Digital signal reproducing apparatus |
| 01/09/1991 | EP0406852A2 Automatic gain control method and appartus in optical disk system |
| 01/09/1991 | EP0406744A2 Device for editing spoken text stored on a magnetic tape and/or in a semiconductor memory |
| 01/09/1991 | EP0406302A1 Recording system having head transducers with controlled skew |