Error detection system

G - Physics – 06 – F

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354/224

G06F 11/00 (2006.01) G11B 20/18 (2006.01) H03M 13/09 (2006.01) H03M 13/27 (2006.01)

Patent

CA 1208794

ABSTRACT OF THE DISCLOSURE The present invention provides methods and apparatus for improved error detection in a data processing system. The techniques of the present invention insure that there is a high probability that an error in a record of data (each record comprising a plurality of data bits) is detected. In the event of an error, the present invention applies a randomizing function to the error which modifies subsequent bits within the record and then propagates and further randomizes the error throughout the record to magnify its apparent size. The randomizing and propa- gation of the error significantly lowers the misdetection pro- bability for random errors within a record, in that error detect- ability is no longer pattern sensitive. The use of both propa- gation and randomization functions significantly alters the data containing an error, such that a high probability of detection using check-sum techniques exists.

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