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| Number | Title | Issue Date |
| 7420758 | Head system, recording and reproduction system, and magnetic recording method Disclosed is a head system including a plurality of recording heads for azimuth recording. The system includes a first recording head having a plurality of magnetic gaps having a first azimuth angle, and a second recording head having a plurality of magnetic gaps ha... | 09/02/2008 |
| 7106535 | Method and apparatus for maintaining consistent track pitch in helical scan recorder New helical recording scanner architectures and transducing methods provide a consistent track pitch for helical tracks despite positional errors in placement of transducing elements (or sets of transducing elements) from their nominal positioning. The new scanners ... | 09/12/2006 |
| 7009794 | Magnetic recording and reproducing device In a magnetic recording and reproducing device having a 1ch head and a 2ch head, an azimuth recording operation is carried out on an obliquely evaporated magnetic tape. Angles θ1 and θ2 formed by a direction of a head azim... | 03/07/2006 |
| 6937421 | Patterned media having offset tracks An information recording system includes a storage medium, such as a magnetic or an optical medium, that is formed to have a plurality of adjacent tracks. Each track includes a plurality of storage elements that are arranged substantially along the track in a regula... | 08/30/2005 |
| 6906887 | Record/reproduce equipment of a magnetic tape, a servo control method thereof, a servowriter thereof, and a magnetic tape used in record/reproduce equipment A servo control method controlling the position of a magnetic head in order to record/reproduce a data on/from a magnetic tape having a number of servo tracks, is performed along the following manner. First, a servo signal is written to each servo track of the magne... | 06/14/2005 |
| 6813109 | Rotary magnetic head apparatus for performing reproduction operations using a plurality of reproduction heads without depending on the arrangement of the recording tracks A rotary magnetic head apparatus which can be formed into a smaller size in which signals of a plurality of recording tracks which are recorded on a tape-like information recording medium are reproduced by using a plurality of reproduction heads without depending on... | 11/02/2004 |
| 5870522 | Backward compatible HDTV recording/reproducing system A magnetic tape recording with a new signal encoding format, apparatus for recording this format and reproducing apparatus for reproducing signals from this format. A standard VHS signal is recorded as a first set of parallel slant tracks having a predete... | 02/09/1999 |
| 5870239 | Magnetic reproduction apparatus provided with a cross talk reduction system A magnetic reproduction apparatus with a cross-talk reduction system that includes first and second magnetic heads, wherein the distance between the first magnetic head which has a plus azimuth angle and the second magnetic head which has a minus azimuth ... | 02/09/1999 |
| 5710673 | Azimuth record head for minimizing and equalizing crosstalk between tracks of opposite azimuths In an azimuth recording format, the crosstalk of the A channel into the B channel is higher than the crosstalk of the B channel into the A channel because, at the ends of a magnetic recording where the switching contour of constant magnetic field strength... | 01/20/1998 |
| 5677803 | Apparatus for recording data signals and a signal having a repetitive frequency to a recording medium and/or for reproducing the data signals therefrom By merely using one reproducing head, an overwriting operation and an ATF operation can be performed, thereby reducing a crosstalk obstruction and modulation noises. Recording heads 7 and 8 having different azimuth angles and a reproducing head 9 having t... | 10/14/1997 |
| 5471355 | Magnetic head and a digital recording magnetic head A magnetic head comprises a head base (56), and a pair of magnetic head chips (57, 58) of different azimuth angles (θ1, θ2) disposed on the head base (56). The pair of magnetic head chips (57, 58) are disposed in a stepped arrangem... | 11/28/1995 |
| 5459617 | Apparatus and methods for recording information signals and tracking signals on magnetic tape An apparatus for recording information and tracking signals on magnetic tape includes first and second magnetic heads for recording the information signals on the magnetic tape. The first and second magnetic heads are mounted for rotation about an axis fo... | 10/17/1995 |
| 5442451 | Helical scan recording/reproducing device for simultaneously helically recording/reproducing both video and audio signals A video tape recorder includes a cylinder provided to rotate about its axis. A magnetic tape moves along a portion of the cylinder surface such that the cylinder surface obliquely traverses the magnetic tape. At least one pair of magnetic heads are mounte... | 08/15/1995 |
| 5369531 | Digital video signal recording apparatus with leading and trailing heads displaced by a distance less than the distance between the ending edge of an auxiliary recording area and the starting edge of the video signal recording area A digital video tape recorder includes a rotary drum that has a leading head and a trailing head mounted thereon for recording video signals in respective slant tracks scanned on the tape while the tape is advanced. Each of the tracks includes, in sequenc... | 11/29/1994 |
| 5241442 | Alignment disk In the present alignment disk for adjusting the tracking and azimuth of a magnetic head, a track includes adjacent first and second regions which are circular and substantially concentric. First data and second data are recorded on the first region of the... | 08/31/1993 |
| 5233478 | Apparatus for recording a digital signal composed of different types of data An apparatus for recording a digital signal composed of a plurality of different types of data. A plurality of rotary heads are coupled together to form a head unit, in which the heads are spaced from each other by predetermined distance in a track pitch ... | 08/03/1993 |
| 4979051 | Bimodal multi-track magnetic head A magnetic head, and method of its construction, for placing multiple, high tolerance servo information tracks in evenly spaced configuration across the width of a magnetic medium in a single pass of the magnetic head over the medium. The head comprises a... | 12/18/1990 |
| 4975791 | Recording system having head transducers with controlled skew A magnetic recording system including a write head comprising a write transducer having a gap configured at an angular orientation with respect to direction of travel of an adjacent magnetic medium. Servo information is recorded by the write head into a s... | 12/04/1990 |
| 4945438 | Combined magnetic head A combined magnetic head for recording a data track on a guard band between main tracks of a floppy disk. A guard band data head for data tracks is positioned above the guard band and has a width so as to record satisfactorily data on the guard band witho... | 07/31/1990 |
| 4928186 | Magnetic recording method and magnetic head In a magnetic recording/reproducing apparatus, desired information is recorded on a main track of a magnetic disk using a magnetic head. Other information is recorded on a guard band which is adjacent to the main track using another magnetic head. Each of... | 05/22/1990 |
| 4896220 | Magnetic recording method and magnetic recording head used therefor A method and apparatus for magnetic recording which permits two information signals to be recorded so that they overlay one another. The first and second tracks cross each other without generating crosstalk during reproduction of the two information signa... | 01/23/1990 |
| 4860132 | Rotatable head assembly with offset sub-head gaps A rotatable magnetic head assembly for use in a magnetic tape recording/play-back device of the helical scanning type, the assembly comprising two diametrically oppositely located magnetic transducing heads (12, 12'). In order to enable recording of a num... | 08/22/1989 |
| 4819097 | Audio signal recording/reproducing system for use in time-lapse video tape recorder An audio signal recording/reproducing system is used in a time-lapse video tape recording device for time-lapse recording a video signal on a magnetic tape at predetermined time intervals. The audio signal recording/reproducing system comprises a memory w... | 04/04/1989 |
| 4808884 | High order digital phase-locked loop system A digital data separator operates to separate data pulses from clock pulses in MFM encoded signals read from a magnetic disk system. The data separator includes a digital phase-locked loop system incorporating a variable length shift register which functi... | 02/28/1989 |
| 4807060 | Milti-channel recording apparatus for a plurality of programs A multi-channel recording apparatus capable of recording information signals in a plurality of areas on a recording medium, having a function to record, in connection with a first instruction information for change-over of the recording areas, a second in... | 02/21/1989 |
| 4796128 | Rotary head type reproducing apparatus A rotary head type reproducing apparatus for reproducing information signals recorded in a plurality of recording tracks by tracing, with rotary type magnetic heads, the recording tracks which are formed on a tape-shaped magnetic record bearing medium in ... | 01/03/1989 |
| 4774605 | Rotary head type digital signal playback A rotary head playback for a tape recorded with slanted tracks, each containing many blocks with recorded block addresses. The rotary head is rotated at twice the normal speed so that it scans in a direction inclined to the tracks and scans across multipl... | 09/27/1988 |
| 4771345 | Reproducing apparatus A reproducing apparatus which reproduces speech sounds at a speed faster than a normal reproduction speed. The outputting operation may be performed, making it easier to hear speech sounds when the video searching operation is performed through hearing of... | 09/13/1988 |
| 4758903 | Apparatus for recording and reproducing video signal and digital signal other than video signal In a recording and reproducing apparatus wherein a video signal and an audio signal are recorded on the same recording track, a signal subjected to a quadrature differential PSK modulation with PCM audio signal is generated as an audio recording signal. T... | 07/19/1988 |
| 4748520 | Method for recording a digital information signal and tracking pilot signals at different locations in the track A method and an apparatus for recording a digital information signal are disclosed in which a signal to be recorded is pulse-code-modulated (PCM) and the PCM signal is recorded on a recording medium by a rotary head as a slant tracks with no guard band be... | 05/31/1988 |
| 4660104 | Method for recording and/or reproducing video and audio signals on a magnetic tape and a rotary cylinder arrangement therefor Both an audio signal and a video signal are recorded on a video tape (3) by way of a pair of audio heads (Ha1, Ha2) and a pair of video heads (Hv3, Hv4) both mounted on a rotary cylinder (1) of a video tape recorder of helical scan type which can be opera... | 04/21/1987 |
| 4646169 | Magnetic recording device Described is a magnetic recording device in which digital data are recorded with higher density in such a manner that plural recording tracks are sequentially formed on the magnetic recording medium. In the magnetic recording device, any two adjoining tra... | 02/24/1987 |
| 4642705 | Magnetic recording and reproduction apparatus, system and method A system and method for effecting high density magnetic recordings on magnetic record members such as tape, cards, discs and drums coated with magnetic recoding material. A plurality of different recordings may be provided as overlapping domains or arrays... | 02/10/1987 |
| 4639805 | Combination of reproducing heads and a rotary transformer device A rotary transformer is employed in a 4-head type recording and/or reproducing apparatus which has a rotary body which is wrapped with a magnetic tape, and four heads mounted 90° apart from each other on the rotary body for recording and/or reproducing a... | 01/27/1987 |
| 4636873 | Method and apparatus for recording and reproducing an information signal with a larger tape wrapping angle Apparatus for recording and reproducing digital color video signals from successive, parallel tracks on a magnetic tape includes a rotary guide drum about which the magnetic tape is wrapped for an angle greater than a nominal angle of 180° for real time ... | 01/13/1987 |
| 4633332 | Multi-mode magnetic recording system and multi-mode magnetic recording and playback system for VTR A multi-mode recording and playback system for VTR records audio signals and video signals and plays them back from audio tracks and video tracks on a magnetic tape by means of a plurality of rotating audio and video heads. A rotating drum around which a ... | 12/30/1986 |
| 4630132 | Video signal recording/reproducing apparatus A helical scan type magnetic recording/reproducing apparatus in which a magnetic tape is guided helically around a rotary magnetic head assembly over an angular range approximating to 360°. Two magnetic heads are disposed relatively closely to each other... | 12/16/1986 |
| 4607293 | Magnetic recording and reproduction system A magnetic recording and reproduction system of a helical scanning type provided with audio heads which rotate together with the rotary video heads so that the frequency-modulated audio signal is recorded by the audio heads on the video track on which the... | 08/19/1986 |
| 4539615 | Azimuthal magnetic recording and reproducing apparatus An azimuthal magnetic recording and reproducing apparatus comprises a magnetic head including at least one head gap for the recording and reproduction of information on and from recording tracks extending in the longitudinal direction of a magnetic tape. ... | 09/03/1985 |
| 4535367 | Magnetic record still mode reproduction apparatus and method A reproduction device for a helical scanning type video tape recorder with a head section comprises upper and lower immovable cylinders and a head drum rotatably set between the cylinders. A magnetic tape slides along the peripheral surface of the head se... | 08/13/1985 |
