Ternary data encoding system
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United States of America Patent
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Mar 19, 1985
Issued Date -
N/A
app pub date -
Jul 5, 1983
filing date -
May 5, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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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