Methods and apparatus for encoding and decoding data to and from

Details Methods and apparatus for encoding and decoding data to and from Methods and apparatus for encoding and decoding data to and from

1986-02-07

1987-09-01

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03M 700

Patent

active

046911936

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.

REFERENCES:
patent: 4463344 (1984-07-01), Adler
patent: 4567464 (1986-01-01), Siegel

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