DECODING DEVICE AND DECODING METHOD

摘要

In the present invention, a frame data recording unit (40) inputs LDPC-encoded data through a communication pathway. An inference unit (48) infers the state of the communication pathway on the basis of the input data. In accordance with the inferred state of the communication pathway, a selection unit (54) selects a normalization constant from among a pre-defined plurality of normalization constants that are to be used when updating an external value ratio on the basis of a prior value ratio during check node processing by a min-sum algorithm. A min-sum processing unit (46) uses the selected normalization constant to execute the min-sum algorithm on the input data.