Code error correction method

Details Code error correction method Code error correction method

1985-01-25

1986-12-02

Smith, Jerry

Excavating

371 40, G06F 1110

Patent

active

046270582

ABSTRACT:
An improved method of code error correction is disclosed, for detection and correction of errors in data words or check words of a block of data after transmission-reception or recording-reproduction of the data. The method is of the type in which the data block is divided into three sets of sub-blocks, divided along three different array directions, with check words being assigned to each sub-block before transmission or recording based on specific computations (e.g. in accordance with Reed-Solomon code), and is characterized in that a stage of error detection processing applied to one specific set of sub-blocks invariably succeeds each stage of error correction processing applied to the other two sets of sub-blocks and in that three possible states of each error flag can result from correction processing, to respectively indicate a high probability, a low probability, or an intermediate degree of probability of errors being present in the corresponding word.

REFERENCES:
patent: 3200374 (1965-08-01), Ballard
patent: 4447902 (1984-05-01), Wilkinson
patent: 4497058 (1985-01-01), Sako
patent: 4541092 (1985-09-01), Sako
patent: 4564945 (1986-01-01), Glover

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