Data generating method for forming desired CRC code

Details Data generating method for forming desired CRC code Data generating method for forming desired CRC code

2007-11-20

2007-11-20

Britt, Cynthia (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S708000, C714S757000, C714S807000

Reexamination Certificate

active

10765191

ABSTRACT:
A method of generating a CRC code to determine a variable field value for equalizing a CRC value, which is calculated based on data including the variable field value of a variable field included in a data field according to a generator polynomial, to a desired CRC value, comprises the steps of establishing a temporary variable field value, reading all corrective values which correspond to a bit number where a bit value of said temporary variable field value is “1”, from a conversion table which stores therein corrective values for indicating a bit to be inverted in the variable field value as “1” corresponding to a predetermined bit number, and exclusive-ORing the read corrective values to calculate a first calculated value, and, determining whether the first calculated value corresponds to the desired CRC value or not.

REFERENCES:
patent: 4941144 (1990-07-01), Mizukami
patent: 5379289 (1995-01-01), DeSouza et al.
patent: 6609225 (2003-08-01), Ng
patent: 6766493 (2004-07-01), Hoffman et al.
patent: 2001-244820 (2001-09-01), None

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