Methods and apparatus for encoding and decoding data to and from a (2,7) format
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United States of America Patent
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Sep 1, 1987
Grant Date -
N/A
app pub date -
Feb 7, 1986
filing date -
Feb 7, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods are set forth for constructing encoding and decoding state machines for preselected variable length fixed rate (2,7) codes. These state machines convert a variable length code to a state dependent fixed length fixed rate (2,7) code. Methods and apparatus are also disclosed for implementing a state dependent fixed length fixed rate (2,7) coding scheme in a manner that is simpler and inherently more reliable than the implementation of the corresponding variable length fixed rate (2,7) code. In addition, the disclosed methods and apparatus for implementing the state dependent code preserve the error recovery features of a variable length fixed rate (2,7) coding scheme.
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