| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 10/11/1988 | US4777452 Bit clock signal generator for use in a digital signal demodulator |
| 10/11/1988 | US4777448 Frequency multiplying circuit |
| 10/11/1988 | CA1243123A1 Method of transmitting information, encoding device for use in the method, and decoding device for use in the method |
| 10/11/1988 | CA1243115A1 Apparatus for reproducing information from a record carrier |
| 10/06/1988 | WO1988007742A1 Optical recording/reproducing apparatus |
| 10/06/1988 | DE3809223A1 Verfahren, zugeordnete vorrichtung und medium zum optischen aufzeichnen und wiedergeben von informationen Recording method, and associated apparatus for optical medium and playback of information |
| 10/05/1988 | EP0284663A2 Method of handling disk sector errors in dasd cache |
| 10/05/1988 | CN88101865A Optical disk reproducing device |
| 10/04/1988 | US4775985 Method of dc-free 8/9 nrz coding using a unique sync word pattern |
| 10/04/1988 | US4775978 Data error correction system |
| 10/04/1988 | US4775969 Optical disk storage format, method and apparatus for emulating a magnetic tape drive |
| 10/04/1988 | US4775902 Apparatus for recording and reading information on a magnetic disk with track following circuitry |
| 10/04/1988 | US4775901 Apparatus and method for preventing unauthorized dubbing of a recorded signal |
| 10/04/1988 | US4775900 Apparatus for encoding an NRZ digital signal as a BRZ synchronous FM signal |
| 10/04/1988 | US4775899 Apparatus for deskewing successively occurring blocks of data |
| 10/04/1988 | US4775897 Dubbing method and apparatus for digital recording reproducing apparatus including direct digital outputs |
| 10/04/1988 | CA1242809A1 Data storage system |
| 09/28/1988 | EP0284291A2 Drop-out detector circuit |
| 09/28/1988 | EP0284280A1 Adaptive threshold adjustment method and apparatus |
| 09/28/1988 | EP0284279A1 Pulse detection circuit using amplitude and time qualification |
| 09/28/1988 | EP0284037A2 Modular data storage directories for large-capacity data storage units |
| 09/28/1988 | EP0283727A2 Method and apparatus for producing an audio magnetic tape recording at high speed from a preselected music libray |
| 09/28/1988 | EP0191775A4 Recorded information verification system. |
| 09/27/1988 | US4774701 Data recording method with improved synchronization recovery |
| 09/27/1988 | US4774700 Information recording and reproducing apparatus with detection and management of defective sectors |
| 09/27/1988 | US4774605 Rotary head type digital signal playback |
| 09/27/1988 | US4774602 Method for distinguishing original of a magnetically recorded medium from its duplicates |
| 09/27/1988 | US4774601 Read channel for magnetic recording |
| 09/27/1988 | US4774479 Phase locked loop circuit |
| 09/27/1988 | US4774454 Distortion measuring system method utilizing signal suppression |
| 09/22/1988 | WO1988007311A1 Error correction of digital image data by means of image redundancy |
| 09/22/1988 | WO1988007254A1 Disk recording/reproducing apparatus and disk recording/reproducing method |
| 09/22/1988 | DE3707608A1 Method of coding to prevent video and audio piracy |
| 09/22/1988 | DE3639659A1 The recording of information |
| 09/21/1988 | EP0283320A2 Recording/reproducing apparatus for digital composite video signal with means for synchronising colour subcarrier phase |
| 09/21/1988 | EP0283304A2 Optical disc reproduction apparatus |
| 09/21/1988 | EP0283282A2 Drop-out detector circuit |
| 09/21/1988 | EP0282877A1 Method and apparatus for controlling the error correction in a data transmission system of data read from dynamical peripheral storage devices, in particular disk storage devices of a data-processing system |
| 09/20/1988 | US4773094 Apparatus and method for calibrating recording and transmission systems |
| 09/20/1988 | US4773036 Diskette drive and media type determination |
| 09/20/1988 | US4772963 Duplicate digital date recording apparatus for enhancing bit error rate performance of a data storage medium |
| 09/20/1988 | US4772960 Apparatus for recording and/or reproducing an information signal comprised of at least an audio signal and an index signal |
| 09/20/1988 | US4772959 Digital signal recording and reproducing apparatus |
| 09/20/1988 | CA1242280A1 Information recording and reproducing apparatus |
| 09/20/1988 | CA1242275A1 Circuitry for characterizing speech for tamper protected recording |
| 09/14/1988 | EP0282242A2 A phase synchronizing circuit for a time axis shift correcting circuit |
| 09/14/1988 | EP0282209A2 Data reproducing device |
| 09/14/1988 | EP0282159A2 Data signal delay generating apparatus |
| 09/14/1988 | EP0282036A1 Apparatus for recording data into optical recording medium |
| 09/14/1988 | CN86104490B Method and apparatus for recording and redisplaying information |
| 09/13/1988 | US4771441 Synchronizing unit |
| 09/13/1988 | US4771413 Optical recording and reproducing apparatus |
| 09/13/1988 | US4771188 Adaptive threshold adjustment method and apparatus |
| 09/07/1988 | EP0281408A2 Optical information recording and reproducing apparatus |
| 09/07/1988 | EP0281009A2 Signal processing circuit |
| 09/06/1988 | US4769819 Two stage coding method |
| 09/06/1988 | US4769818 Method and apparatus for coding digital data to permit correction of one or two incorrect data packets (bytes) |
| 09/06/1988 | US4769804 Optical data recording and reproducing apparatus with erase function diagnosis |
| 09/06/1988 | US4769802 Information recording medium disc and method and apparatus for recording/reproducing information using the disc |
| 09/06/1988 | US4769782 In a data processing system |
| 09/06/1988 | US4769722 Apparatus for recording and reproducing a video signal and for recording and reproducing a PCM audio signal on forward and reverse tape travelling directions |
| 09/06/1988 | CA1241743A1 Information signal reproducing apparatus |
| 08/31/1988 | EP0280575A2 Fir type digital filter for recording and reproducing apparatus |
| 08/31/1988 | CN87108158A Optical information recording and reproducing device for erasable optical disk and processing defect arc section |
| 08/30/1988 | US4768181 Apparatus for determining defective or non-used sectors of an optical dish |
| 08/30/1988 | US4768163 Magnetic stripe and wand reader interface employing off-the-shelf programmable communications interface |
| 08/30/1988 | US4768111 Circuit arrangement for shaping an analog read output signal in a rotating mass memory |
| 08/30/1988 | US4768108 Magnetic recording and reproducing system |
| 08/30/1988 | US4768106 Apparatus for recording video and PCM audio signals with insert editing using axially displaced heads |
| 08/30/1988 | US4768104 Video disk recorder and playback unit |
| 08/30/1988 | US4767919 Method for the detection of authenticity in a data carrier and apparatus for applying said method |
| 08/30/1988 | CA1241447A1 Method of transmitting information, encoding device for use in the method, and decoding device for use in the method |
| 08/30/1988 | CA1241403A1 Device for correcting and concealing errors in a data stream, and video and/or audio reproduction apparatus comprising such a device |
| 08/25/1988 | WO1988006339A1 Method for recording and reproducing data for an optical card |
| 08/25/1988 | WO1988006338A1 Optical disk |
| 08/24/1988 | EP0279561A2 A circuit for generating a frequency-modulated signal |
| 08/24/1988 | EP0279540A2 Method for formatting a disc, method for reading and writing on a disc thus formatted, disc drive with a disc thus formatted and disc thus formatted |
| 08/24/1988 | EP0279209A1 CD player |
| 08/23/1988 | US4766602 Synchronizing signal decoding |
| 08/23/1988 | US4766507 Rotary head reproducer with means for detecting the direction of audio recording during searching |
| 08/23/1988 | US4766505 Method and apparatus for recording video and audio signals in successive tracks on a record medium |
| 08/23/1988 | US4766502 Information signal recording apparatus |
| 08/23/1988 | US4766495 Phase error correcting apparatus |
| 08/23/1988 | CA1241110A1 Apparatus for recording and reproducing digital signal |
| 08/17/1988 | EP0278760A2 Optical card and apparatus for writing and/or reading data thereon |
| 08/17/1988 | EP0278702A2 Apparatus for reproducing a digital signal |
| 08/17/1988 | EP0278551A1 Circuit arrangement to detect when a given frequency range is exceeded |
| 08/17/1988 | EP0278134A1 High capacity disk storage system having unusually high fault tolerance level and bandpass |
| 08/17/1988 | EP0278006A1 A disc device and a disc-like recording medium |
| 08/16/1988 | US4764927 Code error correcting method |
| 08/16/1988 | US4764916 Reading circuit for an optical disk apparatus |
| 08/16/1988 | US4764915 Method and apparatus for recording a multiplexed signal on a record medium |
| 08/16/1988 | US4764913 Signal processing apparatus for disc memory devices |
| 08/16/1988 | US4764824 Dual servo system for rotating tape head control |
| 08/16/1988 | US4764816 Method for optimizing a magnetic tape device for storing digitally coded color television signals |
| 08/11/1988 | WO1988005954A1 Channel filter |
| 08/10/1988 | EP0277655A2 Card-form recording medium and data recording device therefor |
| 08/10/1988 | EP0277549A2 Recorder |
| 08/10/1988 | EP0277395A1 Method of transmitting information by means of code signals, information transmission system for carrying out the method, and transmitting and receiving apparatus for use in the transmission system |
| 08/10/1988 | EP0277276A1 Card with built-in record/playback capability |