Error detection device and error detecting method

An error detection method comprising:

• generating an input code sequence from a signal that repeatedly transmits a code sequence that includes data, an error detection code, and an error correction code;
• generating a decoding-target code sequence that includes recovered data, an error detection code, and an error correction code from the input code sequence;
• generating a corrected code sequence by executing an error correction process that uses the error correction code in the decoding-target code sequence on the decoding-target code sequence;
• deciding whether or not the recovered data in the corrected code sequence includes an error by using the error detection code in the decoding-target code sequence;
• generating a reference code sequence that is obtained by adding to the corrected code sequence a corresponding error correction code, or a reference code sequence that is obtained by adding to the recovered data a corresponding error detection code and a corresponding error correction code, when it is decided that the recovered data includes no errors;
• and
• verifying whether or not a decision result for the recovered data is correct according to a comparison result between the reference code sequence and a sequence of a corresponding area in the input code sequence.

A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute an error detection process, the process comprising:

• generating an input code sequence from a signal that repeatedly transmits a code sequence that includes data, an error detection code, and an error correction code;
• generating a decoding-target code sequence that includes recovered data, an error detection code, and an error correction code from the input code sequence;
• generating a corrected code sequence by executing an error correction process that uses the error correction code in the decoding-target code sequence on the decoding-target code sequence;
• deciding whether or not the recovered data in the corrected code sequence includes an error by using the error detection code in the decoding-target code sequence;
• generating a reference code sequence that is obtained by adding to the corrected code sequence a corresponding error correction code, or a reference code sequence that is obtained by adding to the recovered data a corresponding error detection code and a corresponding error correction code, when it is decided that the recovered data includes no errors;
• and
• verifying whether or not a decision result for the recovered data is correct according to a comparison result between the reference code sequence and a sequence of a corresponding area in the input code sequence.