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7391587 Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape  
Methods and systems for data recording and reading for increasing overall tape data storage density, especially for data written in azimuth style. The principles of the invention provide servo...
7362954 Recording apparatus and method, recording medium, and program  
When the head of a data pack that can be a start point of consecutive recording is included in an ECC (error correcting code) bank, data indicating this is set in an ECCTB (error correctly code...
7158338 Servo track having periodic frames of tone field and embedded synchronization marks  
Methods and systems for sensing a position of a transducer head with respect to a storage medium. One method includes generating a read signal from a servo track stored on a magnetic storage...
7046479 Magnetic recording/reproducing device having position control  
Track thinning at an IN point of consecutive recording is prevented by doing a head-track one-edge coincidence tracking by using a head of a larger width than the track width. ATF control unit ( 15...
6999258 Time-based servopositioning systems  
Servo positioning systems, methods, formats, and data recording media used in association with the same, employing additional timing reference information to improve immunity to time-based errors...
6718120 Magnetic recording and reproduction method and apparatus  
In a recording and reproduction method for recording digital data on magnetic tape by a helical scanning method or for reproducing digital data recorded on magnetic tape by the helical scanning...
6697209 Phase based time domain tracking for helical scan tape drive  
In a helical scan recording system, magnetic tape ( 31 ) is transported by a tape transport ( 98 ) proximate a rotating scanner ( 85 ). The scanner has a pair of read heads ( 82 ) mounted thereon,...
6590733 Digital processing of pilot-tone amplitudes  
In a system having an input signal set with at least two signals having mutually exclusive frequencies f 1 and f 2 being part of the input signal set, whose amplitude is represented in an input...
6580573 DISK DRIVE HAVING A CHANNEL CIRCUIT WHICH RECEIVES A READ SIGNAL REPRESENTING DATA IN A DATA SECTOR AND DATA IN A SERVO SECTOR IN A FIRST ORDER AND DEMODULATES THE READ SIGNAL TO PROVIDE DATA SECTOR DATA AND SERVO-SECTOR DATA IN A SECOND ORDER  
A disk drive has a channel circuit for demodulating data sectors and servo sectors stored on a rotating medium to provide data-sector data and servo-sector data. The channel circuit transmits the...
6281675 Self calibrating embedded stripe based timing tracking servo system for helical recorders  
The present specification discloses a preferred method, apparatus, and system for calibrating a magnetic tape system. The magnetic tape system comprises at least one head mounted within a head...
6271981 Detection device and method for detecting pilot signal component from digital signal as well as reproducing apparatus  
A signal detecting device for detecting a pilot signal component from a modulated digital signal which contains information data and the pilot signal component, comprises a digital converter for...
6219489 Apparatus and method for discriminating recording mode  
In order to easily discriminate a recording mode of a magnetic tape even when the fast feeding/rewinding reproducing operation is set to the odd number times speed or even number times speed, a...
6154336 Frame synchronizing circuit in a magnetic recording and reproducing apparatus and a frame synchronizing method thereof  
A reproducing signal read out by a reproducing head is transmitted to a demodulator including a track number detecting circuit through a reproducing amplifier. A microcomputer performs tracking...
6141177 Signal reproducing device and method with tracking error formation  
A device that reproduces signals recorded on a recording medium includes a unit that forms a tracking error signal from pilot signal components recorded in the signal being reproduced. A controller...
6137648 Magnetic tape and a method for recording and reproducing a plurality of different information signals on and from the magnetic tape  
In an information signal recording method for recording one information signal on slant tracks formed on a magnetic tape housed in tape cassette usable in a conventional magnetic recording and...
6134074 Reproducing apparatus having tracking control in accordance with track number information  
There is provided a reproducing apparatus arranged to reproduce an information signal from a recording medium on which a number of recording tracks are formed in parallel with each other and the...
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...
6101060 Method and apparatus for reducing data loss errors in a magnetic tape device  
A method and associated apparatus for reduction of data loss errors in computer data tape transport applications. In tape transport devices with moveable read heads (i.e. auto-tracking...
6081395 Apparatus and method for generating a digital tracking signal with a frequency spectrum corresponding to one or more n-bit words  
A signal recording apparatus for a video instrument using a magnetic recording medium which is capable of more accurately computing the signal to be recorded on the tape by correcting the output...
6021017 Magnetic recording and playback device which processes error signals to obtain a servo correction signal  
A tracking error signal is detected using an error detector, from cross-talk components at a point in each of the regions of several duplication areas from which reproduction is possible, and...
6014284 Signal reproducing apparatus having rotary heads rotating 180° out of phase and producing signals for tracking control  
A signal reproducing apparatus is arranged to have two reproduced signals reproduced from a plurality of tracks formed on a magnetic medium by two rotary heads arranged to rotate 180 degrees out of...
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...
5991109 Magnetic recording and reproducing apparatus with signal delay and selection  
A magnetic recording and reproducing apparatus includes a reading and writing head for writing data on data tracks formed on a recording tape and reading the data therefrom to produce 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...
5973868 Recording and/or reproducing apparatus with means for establishing an after-recording area  
Rotary head recording and/or reproducing apparatus in which respective oblique tracks on a record medium are scanned, each track having an information signal area in which information data is...
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...
5963389 Tape transport system using variable tape speed to achieve constant data speed and advance detection and correction of tracking errors to reduce data loss errors  
The tape transport system acquires telemetry information pertaining to the tape medium at a position in advance of the associated tape segment passing over the movable read head. The advance...
5959802 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 includes correct tracking servo signals which may be produced so that tracking errors may be detected...
5949606 Detection circuit for pilot tones for tracking control in the case of magnetic-tape recordings  
In the case of various recording systems based on the helical-scan method for magnetic tapes, a pilot-tone principle is used for tracking control, generally using two pilot tones which are recorded...
5923493 Information signal reproducing apparatus having means for tracking control  
An information signal reproducing apparatus for reproducing an information signal from a recording medium on which at least one kind of pilot signal component having a predetermined frequency is...
5875065 Information recording reproducing apparatus using pilot signals to correct tracking error  
A plurality of different pilot signal components are selectively superposed on an information signal, and mark signals which can indicate the types of pilot signals to be superposed are recorded,...
5870244 Magnetic recording/reproduction apparatus and method for adjusting head height therein  
The relative height between two sets of magnetic head groups shared for recording and reproduction and mounted on actuators is adjusted at high accuracy, so that a track of a predetermined track...
5867330 Reproducing apparatus detecting pilot signals by binary data processing  
A digital signal reproducing apparatus includes a reproducing circuit for reproducing from a recording medium a signal, whose amplitude takes on plural values, and which was recorded on the medium...
5852529 Digital signal recorder  
A digital signal recorder affixes m bits as a prefix to an input information word of n bits to be encoded into a channel word of n+m bits in parallel. The channel word is divided by a common...
5852520 Data conversion method, pilot signal formation method using the same rotary magnetic head device for use therein  
A data conversion method from m bits of data words into n bits of code words in recording or transmission, in which n is larger than m. A number of bit "0" arranged between one bit "1" and a next...
5777817 VCR tracking control method and apparatus comprising a microcomputer for generating a capstan speed command based on a tracking error expressed as a difference value of freguency components of a pilot signal  
A tracking control method and apparatus of an image recorder/reproducer enable high performance tracking control by generating a capstan motor speed control value using a variable capstan speed...
5771332 8 MM video tape recording/reproducing apparatus capable of performing a high-speed search operation  
An 8 mm image recording/reproducing apparatus is provided which is capable of searching for information recorded on a video tape based on signals recorded on a track of the video tape. Furthermore,...
5754356 Tracking error detector with comparison of amplitude detected pilot signals leaking in from tracks adjacent to the target track  
A magnetic recording and reproducing apparatus includes: a recorder for recording information signals so as to form tracks obliquely on a magnetic tape, and for recording pilot signals so that the...
5739973 Apparatus for recording a mixed video and tracking signal on a magnetic recording medium  
A helical scanning magnetic recording apparatus utilizing Azimuth recording technology includes a reading head and a writing head which are arranged with a predetermined dimensional relationship....
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...
5671101 Tracking control circuit for maintaining substantial balance between reproduced signal levels from plural rotary magnetic heads when tracking control is applied in respect to only one of the heads  
A magnetic recording and reproducing apparatus includes a rotary drum that has a magnetic tape wound around the drum and first and second magnetic heads mounted on the drum for scanning the...
5671100 VCR tracking control method and apparatus for generating a capstan motor drive signal based on the capstan speed control valve  
A tracking control method and apparatus of an image recorder/reproducer enable high performance tracking control by generating a capstan motor speed control value using a variable capstan speed...
5648879 Method of and apparatus for controlling the phase of a video signal  
An apparatus for controlling the phase of a video signal has a track information detector for extracting track pair number data allotted to every N tracks from a reproduced signal when a rotary...
5638484 Tracking control method during multiple speed reproduction of a video tape and apparatus therefor  
A tracking control apparatus having a multiple speed reproduction capability includes a unit for generating a tracking error signal and a microprocessor for controlling driving of a capstan motor,...
5629814 Automatic tracking control apparatus and method  
Automatic tracking control apparatus and method. The apparatus includes a low pass filter for detecting a pilot signal from a magnetic tape in a playback mode, an amplifier for amplifying the...
5617268 Tracking control apparatus that switches polarity of tracking error signal according to detected kind of pilot signal  
An information playback apparatus includes first and second heads which trace a tape on which tracking pilot signals having at least two different frequencies are selectively and periodically...
5606465 Information track format and reading and recording apparatuses therefor  
A reading apparatus for reading information recorded on a first longitudinal recording medium in the form of helical scanned information tracks, according to a first format in which the tracks have...
5596457 Recording apparatus with means for recording a pilot signal and timing sync data in a track following area of a track  
Rotary head recording and/or reproducing apparatus in which respective oblique tracks on a record medium are scanned, each track having an information signal area in which information data is...
5594602 Tracking error detecting circuit  
A tracking error detecting circuit is used in a magnetic reproducing apparatus for reproducing an information signal from tracks which are formed on a magnetic tape obliquely in a longitudinal...
5589997 Tracking control method and apparatus for video recorder which adds a combined first and second tracking error signal to the next tracking error signal  
A tracking control apparatus includes a memory for storing tracking control information of a previous track corresponding to a present position of a current track being tracking-controlled, and a...
Matches 1 - 50 out of 171 1 2 3 4 >