| Patents for G11B 20 - Signal processing not specific to the method of recording or reproducing; Circuits therefor (81,980) |
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| 06/26/1991 | CN1052583A Circuit for compensating color signal of video tape recording and/or reproducing apparatus |
| 06/25/1991 | US5027396 Execution protection for floppy disks |
| 06/25/1991 | US5027357 ECC/CRC error detection and correction system |
| 06/25/1991 | US5027339 Optical card analyzing apparatus |
| 06/25/1991 | US5027229 Magnetic recording apparatus and magnetic recording/reproducing apparatus |
| 06/25/1991 | US5027228 Analog type magnetic recording and reproducing device with digital input/output coupling |
| 06/25/1991 | US5027003 Read/write switching circuit |
| 06/20/1991 | DE4039841A1 Magnetic recording method using QPSK modulation operation - superimposing processed digital audio signal onto analogue components |
| 06/19/1991 | WO1991009364A1 Direct access storage device with independently stored parity |
| 06/19/1991 | EP0433165A1 Magnetic disc recording apparatus and magnetic disc playback apparatus |
| 06/19/1991 | EP0433082A1 Synchronizing signal detector for multi-beam optical disk unit |
| 06/19/1991 | EP0432976A2 Magnetooptic data storage apparatus and magnetooptic disk |
| 06/19/1991 | EP0432668A2 Video signal processing apparatus and method for time base compensation |
| 06/19/1991 | EP0432539A2 Phase locked loop circuit |
| 06/19/1991 | CA2070820A1 Direct access storage device with independently stored parity |
| 06/19/1991 | CA2032364A1 System for recording/reproducing signals on/from magnetic tape in cassettes |
| 06/18/1991 | US5025432 Autochanger of writable discs including a non-volatile memory for storing most recent defect management information relating to the writable discs |
| 06/18/1991 | US5025431 Autochanger of writable discs |
| 06/18/1991 | US5025404 Method of correcting erroneous values of samples of an equidistantly sampled signal and device for carrying out the method |
| 06/18/1991 | US5025328 Circuit for decoding binary information |
| 06/18/1991 | US5025327 Magnetic disk write precompensation method and apparatus which takes into account variations in head/disk characteristics |
| 06/13/1991 | DE4038641A1 Digital to analog converter e.g. for CD player - compares instantaneous signal from digital processor with existing value for transfer to digital to analog converter |
| 06/12/1991 | EP0432137A2 Disk format for secondary storage system |
| 06/12/1991 | EP0431647A2 Apparatus for evaluating a scanning locus of a rotary head |
| 06/12/1991 | EP0431537A2 A digital information signal reproducing apparatus |
| 06/12/1991 | EP0431061A1 Training method and apparatus with audio and digital signals recording and play back |
| 06/11/1991 | US5023890 Digital peak noise reduction circuit |
| 06/11/1991 | US5023876 Method and apparatus for detecting finally recorded sector |
| 06/11/1991 | US5023854 Disc having a data read-only area and a data recording arm and a recording reproducing system therefor |
| 06/11/1991 | US5023742 Magnetic-tape-cassette apparatus including pinch roller-operated switching elements for producing muting and/or track direction detection |
| 06/11/1991 | US5023730 Information recording system and apparatus |
| 06/11/1991 | US5023548 Method and apparatus for verifying a helical scan recording tape using a plurality of linear recording heads |
| 06/05/1991 | WO1991008647A1 Split swipe tape recording |
| 06/05/1991 | EP0430928A2 Disk format for secondary storage system |
| 06/05/1991 | EP0430811A2 Magneto-optical signal reproducing apparatus |
| 06/05/1991 | EP0430613A2 Apparatus for reproducing digital and analogue audio signals |
| 06/05/1991 | EP0430482A2 Technique for information protection on fault-tolerant redundant information storage devices |
| 06/05/1991 | EP0430465A2 Digital signal processing circuit |
| 06/05/1991 | EP0430457A2 Method and apparatus for qualifying data pulses in a raw data signal produced by a magnetic transducer |
| 06/05/1991 | EP0430427A2 Digital signal equalizing circuits |
| 06/05/1991 | EP0430341A2 Method for time-interleaved processing of data words and apparatus for using it |
| 06/05/1991 | EP0430283A2 Method and system for magnetically recording information on recording medium |
| 06/05/1991 | EP0430268A2 Magnetic recording and playback apparatus |
| 06/05/1991 | EP0430043A2 Digital signal processing circuit |
| 06/05/1991 | EP0430042A2 A recording medium and method of reproducing thereof |
| 06/05/1991 | EP0429971A2 Method and apparatus to produce subliminal sound recording |
| 06/05/1991 | EP0429727A1 Data recorder |
| 06/05/1991 | CN1052011A Method of and device for producing frequency modulation |
| 06/05/1991 | CN1051997A Method and apparatus for qualifying data pulses in raw data signal produced by magnetic transducer |
| 06/05/1991 | CN1051993A Method for generation of parity symbols and circuit design for carrying out this process |
| 06/05/1991 | CA2068647A1 Split swipe tape recording |
| 06/04/1991 | US5022030 Skewed XOR data storage process |
| 06/04/1991 | US5021897 Memory system for recording and reproducing block unit data |
| 06/04/1991 | US5021894 Recorded data demodulation circuit |
| 06/04/1991 | US5021893 High speed tape duplicating machine |
| 05/30/1991 | WO1991007720A1 Method and apparatus for magnetic recording of data |
| 05/30/1991 | CA2031104A1 Magnetic recording apparatus |
| 05/29/1991 | EP0429435A2 Disk format for secondary storage system |
| 05/29/1991 | EP0429358A1 Method for multiplexing a tone sequence signal in a video picture signal for its recording on a videodisc and associated reproducing system |
| 05/29/1991 | EP0429220A2 A method for coding a binary data string |
| 05/29/1991 | EP0429139A1 Information recording and reading system, and recording device and reading device for use in such a system |
| 05/29/1991 | EP0428765A1 Method and device for frequency modulation |
| 05/29/1991 | EP0428617A1 Dual deck videocassette recorder system |
| 05/29/1991 | EP0428528A1 Data security device. |
| 05/29/1991 | CN1051811A Ultra low-speed recording method and apparatus using common tape recorder |
| 05/28/1991 | US5020046 Apparatus for reproducing recorded data from a disc employing variable regenerated clock delay compensating for variable recording conditions |
| 05/28/1991 | US5019922 Multi-disk player with automatic volume control |
| 05/28/1991 | US5019921 Pop noise removing circuit for a double deck cassette tape recorder |
| 05/28/1991 | US5019919 Apparatus for recording and reproducing divided signals of an angle modulated signal |
| 05/28/1991 | US5019816 Decoding apparatus for digital signal |
| 05/22/1991 | EP0428411A2 Information processing apparatus |
| 05/22/1991 | EP0428208A2 Sector slip with address collision recovery for write once recording media |
| 05/22/1991 | EP0427928A2 Feed forward differential equalizer for narrowing the signal pulses of magnetic heads |
| 05/22/1991 | EP0427927A2 Track position syncopation cancellation in a disk drive |
| 05/21/1991 | US5018126 Checking media operations and recording during optical recording |
| 05/21/1991 | US5018120 Optical recording medium track indexing system |
| 05/21/1991 | US5018028 Audio signal recording apparatus and reproducing apparatus |
| 05/21/1991 | US5017841 FM demodulator |
| 05/21/1991 | CA1284381C Optical disc recording method and apparatus for digital data having a plurality of transmission rates |
| 05/21/1991 | CA1284362C High order digital phase locked loop system |
| 05/15/1991 | EP0427369A2 Data tape apparatus |
| 05/15/1991 | EP0426872A1 Optical disc recording device |
| 05/14/1991 | US5016121 Disk drive controller system |
| 05/14/1991 | US5016120 Apparatus for recording and reproducing a digitized audio signal on a magnetic tape which has a slant track format including means for detecting a control signal to identify a digitized audio signal on the slant track |
| 05/14/1991 | CA1284220C Synchronizing system for digital apparatus |
| 05/14/1991 | CA1284216C Apparatus for recording video and pcm audio signals with insert editing using axially displaced heads |
| 05/14/1991 | CA1284213C Recording and reproducing a time code signal together with digital video and audio signals |
| 05/13/1991 | CA2013184A1 Dat data group assembly |
| 05/10/1991 | WO1991007751A1 Method and apparatus for synchronizing timing signals for helical scan recorder |
| 05/10/1991 | WO1991007744A1 Dual channel helical scan recorder |
| 05/10/1991 | WO1991007721A1 Error correction method and apparatus |
| 05/10/1991 | CA2066626A1 Error correction method and apparatus |
| 05/09/1991 | CA2013183A1 Audio tape operation on a data storage drive |
| 05/08/1991 | EP0426483A2 Disk storage subsystem |
| 05/08/1991 | EP0426353A2 Determination of the error rate of data storage devices |
| 05/08/1991 | EP0426189A2 Mass data storage library |
| 05/08/1991 | EP0426185A2 Data redundancy and recovery protection |
| 05/08/1991 | EP0426135A2 Computer system with function of discriminating storage device |
| 05/08/1991 | EP0426034A2 A digital modulating circuit |
| 05/08/1991 | EP0426033A2 Digital modulating apparatus and digital demodulating apparatus |