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| Number | Title | Issue Date |
| 7196866 | Interconnect structure having multiple layers of traces for electrical connection to a tape head assembly An apparatus and method for electrically coupling read elements and write elements of a tape head assembly to another component includes an interconnect structure having plural layers of traces, with the traces comprising write traces electrically connected to respe... | 03/27/2007 |
| 7031085 | Version tracking of disk write operations The present invention is a disc drive storage unit incorporating novel apparatus, data structure and method for uniquely identifying data written during each write command operation of the disc drive storage unit. The disc drive storage unit attaches unique write id... | 04/18/2006 |
| 6995936 | Information recording apparatus and information recording method An information recording apparatus for recording content information on an information recording medium includes a main information recording area on which main information to be reproduced is recorded, and a plurality of content information recording areas on which... | 02/07/2006 |
| 6980385 | Apparatus for information recording and reproducing In order to generate a sampling clock having a higher accuracy, a synchronous signal generating circuit is provided with a phase error detector, detecting a phase error of a read out signal digitized on the basis of FDTS algorithm, and a VCO, controlling an oscillat... | 12/27/2005 |
| 6975807 | Video tape recorder A video tape recorder includes a rotary cylinder of double-azimuth four-head structure having a pair of main heads and a pair of subheads. When it is detected base on an envelop signal that clogging or the like occurs in the pair of main heads, a controller performs... | 12/13/2005 |
| 6903887 | Multiple level (ML), integrated sector format (ISF), error correction code (ECC) encoding and decoding processes for data storage or communication devices and systems A method and an apparatus encodes and decodes blocks having a predetermined number of sectors of data bytes to detect and correct data bytes in error in each sector of a block. The method and the apparatus generates sector level check bytes for each sector in the bl... | 06/07/2005 |
| 6791776 | Apparatus for information recording and reproducing In order to generate a sampling clock having a higher accuracy, a synchronous signal generating circuit is provided with a phase error detector, detecting a phase error of a read out signal digitized on the basis of FDTS algorithm, and a VCO, controlling an oscillat... | 09/14/2004 |
| 6683738 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 01/27/2004 |
| 6549350 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 04/15/2003 |
| 6437931 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 08/20/2002 |
| 6404571 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 06/11/2002 |
| 6347353 | Information medium having digital signals recorded thereon An information medium having digital signals recorded therein includes a disk having first and second recording surfaces. The digital signals are in the form of a data frame including a lead-in block and n data blocks. The lead-in block has a same format ... | 02/12/2002 |
| 6266201 | Multiple channel rewrite system In a data recording system utilizing multiple channels and data blocks wherein the data blocks are read subsequent to being written so as to check for errors, the data blocks are rewritten according to a method to provide for rewriting only the defective ... | 07/24/2001 |
| 6243221 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 06/05/2001 |
| 6154806 | Method for recording digital signals on multiple-layered disks A method of recording digital signals on a disk having at least a first recording surface and a second recording surface. The digital signals are in the form of a data frame including a lead-in block and n data blocks. The lead-in block has a same format ... | 11/28/2000 |
| 6151580 | Audio playback apparatus An audio playback apparatus for an input data stream (d0) delivered by an audio data source (1) in a standardized data format (F1) is disclosed comprising an input decoder (2) for forming a first data stream (d1), which contains the audio information and ... | 11/21/2000 |
| 6084729 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 07/04/2000 |
| 5995306 | Handling defective frames on hard sectored magnetic tape Method and apparatus are provided for re-recording of a frame on magnetic tape (22) when a first recording of the frame is determined to be defective. A frame whose first recording is defective is re-recorded at a spare or reserved location on the tape. T... | 11/30/1999 |
| 5926334 | Noise reduction system for an audio system An input signal from an audio system is divided into a plurality of frequency bands, and the signal in each frequency band is attenuated by an attenuator. The output signals of the attenuators are added. A level of the signal in each frequency band is det... | 07/20/1999 |
| 5923485 | Storage device for reliably maintaining data in a reproducible state for a long period of time A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a cache memory, a copy control circuit, a reference control circ... | 07/13/1999 |
| 5909329 | High-speed video printer with tracking adjustment of slave tape A video printer for printing a magnetic pattern of a master tape on a slave tape comprises a read head for reading a control signal printed on the slave tape, a phase shift circuit for shifting a phase of the control signal read by the read head, and a wr... | 06/01/1999 |
| 5909334 | Verifying write operations in a magnetic disk drive A method and apparatus for verifying that data written on magnetic disk media can be successfully recovered in subsequent read operations and ensuring that the data to be written is held by a buffer until a read-verify operation indicates that the buffer ... | 06/01/1999 |
| 5617264 | Method and apparatus for rewriting data to a floppy disk by storing reproduced data in a memory A method and apparatus of reproducing and recording data stored in a plurality of tracks of a memory. A recording and reproducing head reproduces data from at least one of a plurality of tracks of a disk-shaped recording medium. The reproduced data is sto... | 04/01/1997 |
| 5612829 | Data recording control method of magnetic tape The present invention pertains to a data recording control method of a magnetic tape in which tape a data, constructed by combining a plurality of packets into physical blocks, is recorded, the method being such that: the entire physical block of data is ... | 03/18/1997 |
| 5485606 | System and method for storing and retrieving files for archival purposes A system and method for backing-up, or storing, user-created files to a magnetic tape, or the like, and for subsequently retrieving, or restoring, selected files. Files that are backed-up utilizing one particular operating system software may be restored ... | 01/16/1996 |
| 5371634 | Arrangement for obtaining prerecorded digital music cassettes An arrangement for reading a digital audio signal from a master medium (7) and storing it in a digital storage medium (10, 90, 90') at a first bit rate in a first step, and for repeatedly reading the digital audio signal from the storage medium and record... | 12/06/1994 |
| 5173815 | Recording position compensation circuit for use in digital information recording-reproduction apparatus A recording position compensation circuit for use in the digital information recording-reproduction apparatus of the present disclosure has a microprocessor for generating an offset signal indicating a deviation between standard signal processing time, wh... | 12/22/1992 |
| 5142422 | Dual channel helical recorder A dual channel helical scan recording system (30) includes a rotating dum (36) having sets of heads (W1, W2) (R1, R2) mounted on its peripheral surface (56). A set of write heads (W1, W2) is situated on an opposite side of the drum (36) from a set of read... | 08/25/1992 |
| 5075804 | Management of defect areas in recording media An improved method of managing media defects in disk drives keeps an operating list of the tracks in the disk drive, and for each track enters on the list the number of good sectors (i.e., those free of defects) in that track. Thus the information on the ... | 12/24/1991 |
| 4935825 | Cylinder defect management system for data storage system A system for managing data errors and media defects on magnetically and optically encoded disks. The invention is a disk controller utilizing a cylinder-based defect management system that reduces the amount of physical media space needed for bad block da... | 06/19/1990 |
| 4885735 | Information recording and reproducing apparatus with management of defective sector An information recording and reproducing apparatus for recording and reproducing information on and from a disk type information recording medium, wherein the information recording medium is used in which normal sectors (s1, Sn) each having an address for... | 12/05/1989 |
| 4825306 | Video translation system for translating a binary coded data signal into a video signal and vice-versa The binary coded data signal is divided into data blocks in the video translation system in accordance with the invention. n copies are made of each data block. Televison synchronization signals are added to the original data block and to the n copies the... | 04/25/1989 |
| 4718074 | Dejitterizer method and apparatus Dejitterizer apparatus is disclosed which uses a counter to track the number of bits stored in a 64-bit FIFO buffer. The counter is incremented on a falling edge of pulses of a timing pulse signal, nominally 6.176 Mhz, that coincides with a pulse of a jit... | 01/05/1988 |
| 4620243 | Disk drive incremental rewrite A transducer head on a disk drive apparatus is offset about an expected center of a data track as indicated by servo information not included in the data track. If data does not have a predetermined level of readability, the head is known to be shifted wi... | 10/28/1986 |
| 4559568 | Apparatus for re-recording a digital signal on a record medium and for reproducing the same therefrom An apparatus for re-recording a new digital signal in a track on a magnetic record medium which has a previously recorded digital signal in the track, the digital signal being arranged in data blocks each containing a sync signal, a data signal, an error ... | 12/17/1985 |
| 4405952 | Apparatus for detecting faulty sectors and for allocating replacement sectors in a magnetic disc memory Each face of a magnetic disc memory is divided into sectors of a circle and into concentric tracks on which are recorded or from which are recovered binary data transferred between a central processing unit and the disc memory. Each sector of each track i... | 09/20/1983 |
| 4353129 | Digital data transmission system A digital data transmission system comprises a transmitter and a receiver, said transmitter comprising storage means for temporarily storing a data bit string forming a coded digital video signal, means for supplying a read request signal for reading out ... | 10/05/1982 |
| 4016547 | Mos shift register compensation system for defective tracks of drum storage system Loss of a magnetic track on a rotating drum memory is compensated for by a erially connected shift register. Since replacement of an entire magnetic drum is a costly venture, it usually is not warranted when only one or two or several tracks have become co... | 04/05/1977 |
| 3945035 | Method and means for filtering and amplifying signal components of desired frequency A method and means for filtering and intensifying signal components of a desired predetermined period of repetition wherein a plurality of recording heads in tandem arrangement are provided, adjacent recording heads being equally spaced from each other. A... | 03/16/1976 |
| 3935593 | Multi-media production programmer Novel equipment utilizing a single head, single gap on a single track in an audio magnetic recorder to permit control of a large variety of audio-visual devices for the pre-programming of a multi-media presentation in educational, entertainment and other ... | 01/27/1976 |
