用來檢查、糾正二進制信息序列在傳輸過程中出現的突發錯誤的一種循環校驗碼，它是計算機磁碟存儲器常用的錯誤校驗碼之一。A cyclic check code used to check and correct the burst error appeared in the transmission procedure of binary information sequence. It is one of the error check codes in common use for computer disc memory.