| 摘要 |
PROBLEM TO BE SOLVED: To detect whether or not an error is included in a signal after decoding while suppressing deterioration of communication performance.SOLUTION: A decoder 24 receiving an input signal subjected to convolutional coding, as an error correction coding for a digital signal, decoding the input signal, and outputting a decoded signal, includes a soft decision Viterbi decoding section 25 performing soft decision Viterbi decoding of the input signal, a hard decision Viterbi decoding section 26 performing hard decision Viterbi decoding of the input signal, and a decoding result comparing section 28 for outputting first error detection information indicating whether or not an error is included in the output signal from decoder 24, based on the comparison of the decoding results from the soft decision Viterbi decoding section 25 and the decoding results from the hard decision Viterbi decoding section 26.SELECTED DRAWING: Figure 1 |
