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7362537 Velocity adaptive compensator for a synchronous sampling time-base servo system  
Disclosed are a system, a method, and article of manufacture to provide a velocity adaptive compensator for a synchronous sampling servo control system.
7177114 Apparatus, system, and method for the velocity proportional clocking of time base servo tape storage devices  
An apparatus, system, and method are disclosed for the velocity proportional clocking of time base servo tape storage devices. The apparatus, system, and method allow the velocity of time base...
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...
7035040 Sequenced time-based servo techniques  
The invention is directed to servo techniques that make use of sequences of servo marks, rather than individual marks for generation of position error signals. In particular, random or...
6992847 Linear sliding tape scanner and method for using same  
An apparatus for helical scan recording/playback of preselected tacks on a flexible tape medium comprising a linear slide structure capable of movement transversely relative to a longitudinal...
6950269 System and methods for using servopositioning signals  
Servopositioning data is written onto a linear recording medium such that a position error signal is intentionally created. Precise control over the distance between servo signals simulates...
6906888 Method for write track placement correction  
A method for correcting data track placement in a magnetic tape drive is provided. The invention comprises writing at least one data track on a magnetic tape, wherein the data track is written in a...
6891687 Magnetic recording/reproducing apparatus capable of recording/reproducing data at the same head-cylinder revolving speed/configuration  
An input signal is recorded in a recording tape α by converting the input signal to a record signal through the modulation performed at the timing corresponding to the previously-specified number...
6864656 Magnetic disk drive and voice coil motor drive circuit  
A magnetic disk drive that drives and positions an actuator using a voice coil motor, includes a current sensing resistor connected in series to a terminal on current input side of the voice coil...
6731452 Data recording and/or reproducing apparatus and method  
To assure good data playback characteristics even when reading data from a magnetic tape having recording tracks at a narrow pitch, a data recording and/or reproducing apparatus is provided which...
6571205 Method and apparatus for transferring information between devices using a tape drive  
A method and apparatus for transferring information between first and second devices, where the first device includes a tape drive having a tape drive head. A tape head interface is removably...
6563664 Magnetic signal recording and reproducing apparatus and magnetic signal recording and reproducing method  
There are provided an approximately cylindrical rotary drum, a magnetic field applying means and a magnetic field detecting means that are mounted on the rotary drum, signal processing means, and a...
6512651 Helical scan tape track following  
Track positioning of a scanning tape head in a helical tape system may be adversely affected by relative offsets between elements in read element pairs and in write element pairs accessing...
6510018 Magnetic recording and reproducing apparatus with electronic adjustments of interval between stationary and rotary heads  
When an operator inserts a standard magnetic tape into the magnetic recording and reproducing apparatus and performs operation for bringing the apparatus into the play mode for checking X value,...
6349012 Magnetic recording and/or reproducing apparatus  
A magnetic recording and/or reproducing apparatus has compatibility with a conventional analog signal recording/reproducing VTR and can realize an operation mode in which a digital signal is...
6349011 Automatic tracking system and tracking method  
An automatic tracking system includes an analog/digital converter for converting an envelope signal detected by scanning a track during reproduction into a digitized envelope signal; a first track...
6288864 Calibration of magnetic tape drive  
In a method of calibrating a helical scan magnetic tape drive, a dual scan calibration tape having a calibration stripe is loaded into the tape drive. As a head traverses differing paths along the...
6266204 Tracking controller for a tape-like recording medium  
A tracking control apparatus for a tape-shaped recording medium according to this invention is operative, prior to carrying out actual reproduction, to measure times from the time point serving as...
6181506 Tracking control device  
A novel tracking control device and method is disclosed. In the tracking control device and method, digital information is reproduced from a recording medium by a reproducing head, an error...
6144518 Preparation and usage of dual-scan master calibration tape for magnetic tape drive  
A dual-scan master calibration tape is prepared and used for adjusting guide elements of a magnetic tape drive. The dual-scan master calibration tape is generated by transporting the master...
RE36933 Disk reproduction apparatus capable of continuously varying a reproduction speed  
A pickup reads data recorded on a disk and outputs a current signal corresponding to the read data. An amplifier outputs the current signal as a voltage signal. A data slice circuit binarizes the...
6134073 Methods and apparatus for controlling motion of recording media  
During retrieval of data from tape in a helical scan tape drive mechanism with a rotary head drum, movement of tape past the drum by a capstan is controlled to keep the tracks recorded on the tape...
6134072 Tracking of non-native stripes in helical scan tape drive  
A tracking method enables a first read head (R1) and a second read head (R2) of a helical scan tape drive (30) to read non-native helical stripes, the non-native helical stripes being wider than...
6130799 Signal recording and/or reproducing apparatus, method, and medium with pilot signal and tracking servo signal recorded at different azimuth angles  
A method and apparatus for recording and/or reproducing signal on or from a recording medium, wherein correct tracking servo signals may be produced so that tracking errors may be detected...
6104567 Recording and reproducing apparatus including a tracking apparatus with a steady speed deviation circuit  
A tracking apparatus for a helical scan magnetic recording/reproducing system includes a rotation speed controller for controlling the rotation speed of a capstan motor which transports a magnetic...
6078456 Variable-speed playback apparatus for digital video signals  
An apparatus and method for reproducing digital information recorded in tracks of a recording medium, such as a magnetic tape. A track number and a synchronization block number may be utilized to...
6038095 Signal reproducing apparatus  
A signal reproducing apparatus realizes an auto-tracking in reproducing a plurality of recorded signals simultaneously with a simple construction. The signal reproducing apparatus is featured by...
6028732 Tracking control device with error signal selection from plural error signals  
A tracking control device and method reduce the rate of occurrence of data error and improve the quality of reproduced images in a digital VTR. The tracking control device comprises a reproducing...
6025967 Method of identifying magnetic tape characteristics  
A method for providing information about the characteristics of a length of magnetic tape to a tape drive without the use of a separate sensor. The drive has a scanning read/write head that is...
6018434 Tape cartridge having written-in-defect servo patterns for rapid head position calibration  
A magnetic storage tape includes a plurality of spaced-apart servo reference patterns formed along a longitudinal reference axis. The patterns result in a predetermined pattern of coherent magnetic...
6005741 Reproducing apparatus using pilot signal crosstalk for tracking control and using pilot signals to eliminate a back lock condition  
An information signal reproducing apparatus for reproducing information signals from a recording medium in which a pilot signal component having a predetermined frequency is superimposed on the...
5986846 Methods and apparatus for track centering an arcuate scanner head assembly  
A servoing system is provided for use in an arcuate scanner having an arcuate scanner head assembly (ASHA) that has least one transducer on a rotatable drum. The servoing system includes a first...
5978171 Information signal reproducing apparatus with diverse mode tracking control  
In a reproducing apparatus for reproducing an information signal from a recording medium on which a number of recording tracks are formed in parallel to each other and on which the information...
5978166 Method of and apparatus for positioning a rotary magnetic head drum in an arcuate scan system  
An apparatus for positioning at least one magnetic head relative to a magnetic tape for recording and reproducing information includes a head unit for holding at least one magnetic head and a...
5978165 Method of determining axial offset distance in helical scan tape drive  
A method of determining a vertical (e.g., axial) offset distance between a first and a second transducing element of a helical scan tape drive involves varying a ratio of a rotational velocity of...
5973875 Method and apparatus for determining and using head parameters in a helical scan recorder  
Methods of calibrating a helical scan recorder include transporting a storage media past a drum at a controlled linear velocity and recording tracks on the media using a write head. During a...
5969898 Method and system for reading data that is unreadable by a tape drive  
A method and system for reading data containing errors due to curved or displaced tracks in a track region reproduced by reproducing heads in a tape drive includes a signal processing circuit for...
5966265 Information signal reproducing apparatus having means for tracking control  
An information signal reproducing apparatus for reproducing information signals from a recording medium on which several parallel tracks are formed, in which a tracking error signal is produced by...
5959799 Method and apparatus for tracking control by checking timing between a rotary head reference position and an onset of reproducing tracking information recorded in each track  
A method and apparatus for tracking control of a magnetic head having information signals and tracking signals recorded on a plurality of slanted tracks measures a time duration from a time when a...
5936791 Helical scan data recording and playback method and apparatus wherein reference helical tracks preceding data recording area on magnetic tape are played back before recording or playback of target data  
A helical scan data recording and playback apparatus includes a tape driving motor which continuously transports a magnetic tape on which there are a data recording area and a plurality of...
5859741 Method of positioning a magnetic head  
An apparatus for positioning at least one magnetic head relative to a magnetic tape for recording and reproducing information includes a head unit for holding at least one magnetic head and a...
5859736 Magnetic recording/reproducing apparatus and method for controlling the magnetic head during postrecording or dubbing operation  
A magnetic recording/reproducing apparatus is provided which prevents the deterioration of the signal quality when a portion of a signal recorded on successive tracks on the magnetic tape is dubbed...
5856798 Magnetic-tape recording/reproducing arrangement comprising a coding device  
A magnetic-tape recording/reproducing arrangement of the "helical scan" type adapted to record and/or reproduce a digitally coded video signal, includes a coding device (3). In the recording mode,...
5815337 Tape drive having an arcuate scanner and a method for calibrating the arcuate scanner  
A tape drive with an arcuate scanner and a method for calibrating the arcuate scanner double wraps recording tape on the scanner to create two scanner/tape contact zones. The two crossings of a...
5771132 Tracking error data detecting apparatus and VTR having the same apparatus  
A video tape recorder has a drum for winding a magnetic tape therearound, a capstan motor and a drum motor linked with the drum, both motors for traveling the magnetic tape, and two rotary magnetic...
5757589 Head device provided with a reciprocating actuator for alternating an azimuth angle of a magnetic gap  
A head device for use in a VCR comprises a head base with one end affixed to a rotary drum; a head chip that is installed at the other end of the head base and furnished with a vertical magnetic...
5745316 Phase detector for a recorder/player using a conducting loop driven by a winding strand of the head drum motor  
In an electronically commutated head drum motor in combination with a motor control circuit, commutation control and tacho signals are generated from the commutation of winding strands. One of the...
5737146 Data recording and playback apparatus using a helical scan system with magnetic head for recording and playing back pattern signal for tracking in tracking area within helical track  
Recording areas for tracking on which specific servo patterns are recorded are provided preceding data tracks on which data is to be recorded on a recording tape scanned by a helical scan system....
5734518 Method and apparatus for determing desired rotational velocity of take-up reel for helical scan recorder  
Methods and apparatus are provided for determining a servo offset value and a take-up reel velocity for imparting a desired linear velocity to tape in a helical scan recording system (20). The...
5729400 Data recorder using still framing techniques for information retrieval and method  
An automatic scan tracking, helical tape type of data recorder is disclosed herein along with its method of operation. Data is written onto magnetic recording tape along with data retrieval...
Matches 1 - 50 out of 210 1 2 3 4 5 >