Method and apparatus for providing error correction to symbol le

Details Method and apparatus for providing error correction to symbol le Method and apparatus for providing error correction to symbol le

1991-08-06

1992-11-03

Beausoliel, Robert W.

Excavating

371 371, 371 53, 371 493, G06F 1110, H03M 1300

Patent

active

051611635

ABSTRACT:
An error correction coding system employs a single check symbol from an arbitrary sequence of information symbols to provide single error correction at the symbol level. The sequence of information symbols may in fact also be arbitrarily long. The coding system of the present invention provides both a method and apparatus for encoding the check symbol and a method and apparatus for error correction based upon the single coded symbol character. The system is particularly applicable for use in conjunction with bar code recognition systems but is in fact applicable to a broad range of coding systems, including optical character recognition and ordinary alphanumeric codes. The system is also extendable to any system employing an odd number of code symbols that may be present in a single character position.

REFERENCES:
patent: 3815495 (1974-06-01), Strackbein
patent: 4742521 (1988-05-01), Nishida

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