| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 02/28/1989 | US4809093 Apparatus for selectively controlling magnetic tape recorder's muting operation in response to detection of errors in the reproduced signal by one of two heads |
| 02/28/1989 | US4809092 Improved method and arrangement for recording digital data on a magnetic recording medium by use of binary data signals and magnetic bias signals |
| 02/28/1989 | US4809090 Recording/reproducing system having a magnetic head of preceding-erase type |
| 02/28/1989 | US4809088 Integrated system for implementation of read window margining and write precompensaton in disk drives |
| 02/28/1989 | US4809087 Apparatus for recording a discriminative signal |
| 02/28/1989 | US4808992 Component audio/video system with automatic turn-off of peripheral devices |
| 02/28/1989 | US4808884 High order digital phase-locked loop system |
| 02/28/1989 | CA1250662A1 Video signal reproducing apparatus |
| 02/28/1989 | CA1250661A1 Apparatus for recording and/or reproducing digital information signal |
| 02/23/1989 | WO1989001686A1 Disk-like recording medium and disk apparatus |
| 02/22/1989 | EP0303700A1 Optical disk |
| 02/21/1989 | US4807257 Apparatus for the regeneration of channel-clock information in synchronous data transmission and data-recovery circuit arrangement comprising such apparatus |
| 02/21/1989 | US4807205 Process for writing with updating and reading informations on a non-erasable support organized into sectors |
| 02/21/1989 | US4807060 Information signal recording apparatus |
| 02/21/1989 | US4807057 Data recording apparatus |
| 02/21/1989 | US4807056 Method and apparatus for video signal recording and playback signal level compensation based on recorded reference signal |
| 02/21/1989 | US4806792 Differential amplifier circuit |
| 02/21/1989 | CA1250366A1 Verification system for document substance and content |
| 02/15/1989 | EP0303377A1 Method of recording position information of last track recorded with data in directory area |
| 02/15/1989 | EP0303230A2 PCM signal reproducing/recording apparatus |
| 02/14/1989 | US4805090 Peripheral-controller for multiple disk drive modules having different protocols and operating conditions |
| 02/14/1989 | US4805048 Method for controlling to keep off defects on magnetic disks |
| 02/14/1989 | US4805047 Read/write magnetic disk apparatus operable in plural density modes |
| 02/14/1989 | US4805046 Information recording and reproducing apparatus using sectors divided into a plurality of frames and having means for proper storage of the frame data |
| 02/14/1989 | US4805042 Editing apparatus for separately recording a plurality of information signals along with respective time code signals in slant tracks on a magnetic tape |
| 02/14/1989 | US4805040 Drop-out correction circuit in an apparatus for correcting time base error with inhibition of time-base information during dropout |
| 02/14/1989 | US4804959 Method and apparatus using multiple codes to increase storage capacity |
| 02/14/1989 | US4804925 DPSK exclusive-OR demodulator |
| 02/09/1989 | WO1989001222A1 Optical recording medium |
| 02/08/1989 | EP0302119A1 Method for recording and reproducing data for an optical card |
| 02/07/1989 | US4803704 Circuit arrangement for the recognition of impermissable phase errors in a phase locked loop |
| 02/07/1989 | US4803684 Apparatus for data error correction using rounding technique |
| 02/07/1989 | US4803572 Recording/reproducing method and apparatus of magnetic disk unit in which playback commences before the magnetic head is completely centered on the track |
| 02/07/1989 | US4803570 Rotary head type multichannel information signal reproducing apparatus having sub-information search function |
| 02/07/1989 | US4803566 Digital time base correction using a reference bit |
| 02/02/1989 | DE3822388A1 Plattenfoermiges aufzeichnungsmedium mit festwertspeicher-spuren, beschreibbaren bereichen und mit antriebseinrichtung Plattenfoermiges recording medium with a fixed value memory-traces, writable areas and with power supply device |
| 02/01/1989 | EP0301712A1 Data encoding |
| 02/01/1989 | EP0301504A2 Method of copy protecting a pre-recorded videotape |
| 02/01/1989 | EP0301399A2 Magnetic tape having a recording of digital signals and method of producing the same |
| 02/01/1989 | EP0146773B1 Apparatus for recording a digital data |
| 02/01/1989 | CN1030840A 光盘 CD |
| 01/31/1989 | US4802212 Method and device for preventing tape piracy |
| 01/31/1989 | US4802192 Circuit for detecting synchronizing code |
| 01/31/1989 | US4802190 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 |
| 01/31/1989 | US4802172 Decoding apparatus |
| 01/31/1989 | US4802171 Method for error correction in digitally encoded speech |
| 01/31/1989 | US4802170 Error disbursing format for digital information and method for organizing same |
| 01/31/1989 | US4802169 Method of and device for storing and reading digital information at option protected or not by an error correcting code |
| 01/31/1989 | US4802154 High density codes for optical recording |
| 01/31/1989 | US4802152 Compact disc drive apparatus having an interface for transferring data and commands to and from a host controller |
| 01/31/1989 | US4802038 PCM audio signal recording and/or reproducing apparatus with program timer and series and parallel formats |
| 01/31/1989 | US4802025 Video signal circuit having time base correction |
| 01/31/1989 | US4802016 Video noise reduction system with signal emphasis preceding FM modulation upper-band luminance |
| 01/31/1989 | US4801895 Circuit for regulating a voltage controlled oscillator |
| 01/31/1989 | US4801890 Circuit arrangements for modifying dynamic range using variable combining techniques |
| 01/26/1989 | WO1989000796A1 Data encoding |
| 01/25/1989 | EP0300826A2 Digital data detector |
| 01/25/1989 | EP0300732A2 Apparatus for reproducing a digital signal |
| 01/25/1989 | EP0300581A2 Amorphous pip protection apparatus for use in an optical recording apparatus |
| 01/25/1989 | EP0300457A2 Data storage system capable of forming sector-to-sector separation sections |
| 01/25/1989 | EP0300264A2 Defect skipping mechanism for disk drives |
| 01/25/1989 | EP0300029A1 Channel filter. |
| 01/25/1989 | EP0140696B1 Data filing system |
| 01/24/1989 | US4800550 Multi-format optical disk recording/reproducing system |
| 01/24/1989 | US4800549 Method and apparatus for seeking target address with error check code |
| 01/24/1989 | US4800515 Circuit for operating finite fields |
| 01/24/1989 | US4800448 Image recording/reproducing apparatus |
| 01/24/1989 | US4800446 Video disk recorded with video and digital data and recording/reproducing apparatus therefor |
| 01/24/1989 | US4800445 Videodisk player |
| 01/24/1989 | US4800295 Retriggerable monostable multivibrator |
| 01/18/1989 | EP0299818A1 Method for coding information data for transmission in video norms, video disk for carrying out this method and interface of operating such a video disk |
| 01/18/1989 | EP0299742A2 Optical disk |
| 01/18/1989 | EP0299711A2 An audio signal recording and reproducing apparatus |
| 01/18/1989 | EP0133790B1 Disc playback apparatus |
| 01/17/1989 | US4799221 Apparatus for reproducing a digital signal |
| 01/17/1989 | US4799113 Apparatus for processing digital data |
| 01/17/1989 | US4799112 Method and apparatus for recording data |
| 01/17/1989 | US4799111 Video signal recording and/or reproducing apparatus with a function for re-recording a search control-index signal |
| 01/17/1989 | CA1249054A1 Video cassette play counting, storing and reading system |
| 01/12/1989 | WO1989000330A1 Reader circuit for optical recording medium |
| 01/12/1989 | WO1989000329A1 Optical recording medium |
| 01/12/1989 | WO1989000312A1 Method and apparatus for data buffer management |
| 01/12/1989 | DE3818881A1 Verfahren und anordnung zur verarbeitung von informationsdaten Method and arrangement for processing of information data |
| 01/11/1989 | EP0298691A2 Method and apparatus for protection of signal copy |
| 01/10/1989 | US4797755 System and method for transferring data between a plurality of disks and a memory |
| 01/10/1989 | US4796726 Ultrasonic rangefinder |
| 01/10/1989 | CA1248634A1 Method for error detection and error correction |
| 01/04/1989 | EP0297809A2 Methods of and apparatuses for recording and/or reproducing digital data |
| 01/04/1989 | EP0297634A2 Alternate storage areas in magnetooptical media |
| 01/04/1989 | EP0297539A2 Recording control apparatus |
| 01/04/1989 | EP0297461A2 Amplitude compressing/Expanding circuit |
| 01/04/1989 | EP0297318A1 Method for scanning and producing disc-like optical record carriers, and disc-like optical record carrier |
| 01/04/1989 | EP0297242A2 Recording/reproducing system and method with record restriction function |
| 01/03/1989 | US4796280 Digital data separator |
| 01/03/1989 | US4796261 Error correction apparatus for digital data |
| 01/03/1989 | US4796247 Compact disc (CD) player and method of compensating for tracking jumps |
| 01/03/1989 | US4796113 Method and apparatus for automatically replacing defective recording tracks in data storage apparatus |
| 01/03/1989 | US4796110 System and method for encoding and storing digital information on magnetic tape |
| 01/03/1989 | US4796109 Method for testing components of a magnetic storage system |
| 01/03/1989 | US4796106 a.c. Self-biased magnetoresistive reproduce head utilizing second harmonic signal detection |