Design of totally self-checking checkers for Bose-Lin, Bose and Blaum codes

Some efficient systematic codes have recently been developed for detecting t unidirectional errors (Bose-Lin code) and burst unidirectional errors (Bose, Blaum codes). Since unidirectional errors are the most common errors in VLSI circuits, such codes should find widespread use. Totally self-checking (TSC) checker designs have been found for the three codes mentioned above. The designs are easily testable, economical, and have a modular structure. The design for the Bose-Lin code requires at most only 8r-4 codeword tests, where r is the number of checkbits. The number of codeword tests for the TSC checkers for the Bose code and the Blaum code is at most 8r + 4 and 2^r + 8r, respectively.