Decoding apparatus, decoding method and program

摘要

The present invention provides a decoding apparatus for carrying out a decoding process on a ring-R linear code. The decoding apparatus includes coded-word holding means for acquiring a coded word with a code length reduced by omission of some symbols from the coded word and for holding the coded word; known-information addition means for attaching a reliability level of each of the symbols omitted from the coded word to reduce its code length as known symbols each having a known value to the coded word held by the coded-word holding means as known information; and repetitive decoding means for repeatedly carrying out a decoding process using belief propagation on the coded word including the known information attached to the coded word by the known-information addition means.