Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Patent
1997-04-28
2000-06-20
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
360 48, 360 7712, 360 40, G11B 509
Patent
active
060784490
ABSTRACT:
A method of controlling track following in a recorder which uses recording in oblique tracks of a magnetic tape without inactive areas between the tracks and wherein data gaps occur in the useful data sequence due to the change of tracks includes the step of filling the time period containing the data gaps with a predetermined sequence of cyclical modifications of code words representing amplitude and degree increments of a symmetrical train of oscillations. A sequence of code words is used to produce incremental portions of the train of symmetrical oscillations whereby a number of incremental portions forms a complete train of symmetrical oscillations. The code words are modified in synchronism with the clock rate at which the useful data of the recorder are clocked.
REFERENCES:
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Pohlmann, Ken C. "Principles of Digital Audio" 2 Ed. pp. 273-278 1992.
IEEE Transations on Consumer Electronics, vol. 34 No. 3 Aug. '88, "An Experimental Digital VCR With 40 MM Drum, Single Actuator and DCT-Based Bit-Rate Reduction".
IEEE Transactions On Magnetics, vol. 24 No. 2, Mar. 1988 Kees A. Schouhamer "Sighal-to-noise Ratio Pilot Tracking Tones Embedded in Binary Coded Signals" pp. 2004-2009.
IBM Technical Disclosure Bulletin vol. 33 No. 3B Aug. 1990 "Quad Burst Servo Needing No Sync and Having Added Information" pp. 198-200.
Patents Abstracts of Japan P-1090 Aug. 9, 1990 vol. 14, No. 369 "Digital Magnetic Recording System".
Kaaden Jurgen
Stumpf Christof
Wursthorn Edgar
Deutsche Thomson-Brandt GmbH
Sniezek Andrew L.
Tripoli Joseph S.
Wein Frederick A.
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