Variable cell width recording

Details Variable cell width recording Variable cell width recording

1976-04-26

1977-11-29

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

G11B 502

Patent

active

040608379

ABSTRACT:
Binary numbers are recorded on a track of a medium in the form of signals of first and second voltage levels, respectively indicating alternate timing signals of uniform time duration t and data signals of variable time duration x. A timing signal is followed by a short data signal to indicate binary zero, by a longer data signal to indicate binary one, and by even longer data signals to indicate the absence of binary data. The signals may be decoded by counting up from zero during each timing signal and down during each data signal such that a positive count-down indicates a binary zero, a relatively small negative count-down indicates a binary one, and a relatively large negative count-down indicates absence of binary data.

REFERENCES:
patent: 3237176 (1966-02-01), Jenkins
patent: 3281806 (1966-10-01), Lawrance et al.
patent: 3720927 (1973-03-01), Wolf

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