Error Detection and Correction Definition/Meaning:

Errors can occur in stored data, as data is transferred, or in the act of computation based on that data. They are detected by having some redundancy in the data so that redundancy checks can be performed, or by performing (logically) duplicative computational processes. Some detected data-transfer errors can be corrected by re-transferring the data (e.g. from a magnetic tape in which the read process was affected by a transient error). Other errors require the use of forward error correction features. Detected errors in computation are usually corrected by redundant computational units.

See also error control, error-correcting code, error-detecting code.

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