Method and apparatus for recording a digital information signal

Details Method and apparatus for recording a digital information signal Method and apparatus for recording a digital information signal

1983-01-13

1985-04-16

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Redundant or complimentary tracks

360 77, G11B 509, G11B 2110

Patent

active

045119333

ABSTRACT:
For a controlled positioning of a read element relative to a track to be read during the read-out of such a record carrier, low-frequency tracking signals may be recorded in the tracks. Instead of adding separate tracking signals to the information signal, these tracking signals are represented by the d.c. content of the information signal. During conversion of the information words of the information signal into channel words steps are therefore taken to provide two channel words whose d.c. content is equal but opposite for each information word. The choice between these two channel words is made depending on a control signal which depends on the desired tracking signal.

REFERENCES:
patent: 4354208 (1982-10-01), Maury

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