Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1983-07-05
1985-03-19
Sloyan, T. J.
Communications: electrical
Audible indication
Percussion-type sound producer
360 39, 360 40, H04L 300
Patent
active
045062528
ABSTRACT:
Apparatus and method for encoding binary data in a ternary format including ternary 0, ternary 1 and ternary 2 code symbols. In a preferred embodiment of the invention utilized for magnetic data storage, a ternary 0 is represented by the absence of signal change, a ternary 1 is represented by a single transition and a ternary 2 is represented by a pulse or pair of closely spaced transitions. Further features of the invention provide for merging ternary code symbols so as to prevent the spacing between adjacent symbols from becoming so small as to create undesirable crowding, and inserting and shifting symbols to prevent the spacing between adjacent symbols from becoming so great as to adversely affect recovery of the encoded data.
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Cohn Martin
Jacoby George V.
Scott Thomas J.
Sloyan T. J.
Sowell John B.
Sperry Corporation
Truex Marshall M.
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