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Odd Weight Error Correcting Code for 32 Data Bits and 13 Check Bits

IP.com Disclosure Number: IPCOM000056208D
Original Publication Date: 1980-Nov-01
Included in the Prior Art Database: 2005-Feb-14

Publishing Venue

IBM

Related People

Authors:
Kurtz, GW Wilk, JM Williams, GA [+details]

Abstract

An error checking code (ECC) using 13 check bits with 32 data bits corrects all single errors, detects all double errors, and detects all errors in 5 groups of 9 bits each. The code is particularly useful with storage chips that have a 9-bit data bus which is a common storage unit because it stores an 8-bit data byte and a parity bit. Multiple errors often occur in the same storage chip and may cause the failure of a complete chip.