公开(公告)号：US3622982A

公开(公告)日：1971-11-23

申请号：US3622982D

申请日：1969-02-28

Applicant: IBM

Inventor： CLARK BRADFORD S JR ,  FREY ALEXANDER H JR

IPC: H03M13/15 ,  H04L1/10

CPC classification number: H03M13/15

Abstract: The invention relates to a simplified method for extracting triple error correction information from a (23, 12) BoseChaudhuri code which is the Golay code. In a 23-bit word having three or less errors, the method provides correction on a bit-bybit basis. Each bit is assumed to be in error and corrected, the remaining 22 bits are then interrogated for two or less errors. Also disclosed is the apparatus for extracting the error correction information from the Golay code in a Bose-Chaudhuri code is comprised of a check word generator and shifting means, decoder circuitry, false error indication inhibit circuitry, control circuitry and error action circuitry.