Method for error detection and error correction

Details Method for error detection and error correction Method for error detection and error correction

1986-03-13

1988-02-16

Smith, Jerry

Excavating

G06F 1110

Patent

active

047260289

ABSTRACT:
An improved method for detecting and correcting error words in a data block formed of a plurality of words each consisting of a predetermined number of bits of digital signal and including in the block first error check words, second error check words not completely coincident with the first words, and a third error check word, comprising the steps of first executing an error check by the third check word and concluding that an error is in each of the words of the data block when an error is detected, executing second and third error checks by the respective first and second error check words and thereupon setting one of three states namely a state in which each of the words is correct, a state in which each of the words has an error and a state in which it is yet undetermined whether each word is correct or has an error; and when words having errors or undetermined words are included in the first and second words series, changing the state of the words having errors or the undetermined words.

REFERENCES:
patent: 4330860 (1982-05-01), Wada
patent: 4541092 (1985-09-01), Sako
patent: 4569051 (1986-02-01), Wilkinson
patent: 4593395 (1986-06-01), Schouhamer
patent: 4630272 (1986-12-01), Fukami

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