DECODING DEVICE AND ERROR DETECTION METHOD

A decoding device includes a decoding unit that iteratively obtains a decoded bit stream corresponding to an information bit stream of one block, and an error detection unit that divides the decoded bit stream into a plurality of sub-blocks, acquires a plurality of partial remainders respectively corresponding to the sub-blocks, and determines whether an error occurs in the decoded bit stream based on a total remainder in which the partial remainders are added, wherein the error detection unit, of the sub-blocks, acquires a first partial remainder corresponding to a first sub-block including bits in which values are different between a previous decoded bit stream and a current decoded bit stream, and determines whether the error occurs in the current decoded bit stream based on a current total remainder obtained by adding the acquired first partial remainder to a previous total remainder.