Error correcting decoding device and error correcting decoding method

An error correction decoding device, comprising:

• an iterative decoding circuit configured to execute iterative decoding processing for an LDPC code, sequentially output a temporary hard-decision decoding result for each iteration count, and to sequentially output a non-zero-value count that is obtained by executing a parity check for the temporary hard-decision decoding result, the non-zero-value count being a number based on errors in the parity check;
• a parameter generation circuit configured to generate, as a parameter for executing the iterative decoding processing, a threshold which is set for each iteration count;
• and
• a first control circuit configured to control iterative operation of the iterative decoding circuit,
• wherein the first control circuit is configured to:
• receive the threshold which is generated by the parameter generation circuit;
• and
• compare, when an iteration count does not reach a maximum iteration count, the non-zero-value count sequentially output from the iterative decoding circuit and the threshold which is set for each iteration count, and stop the iterative operation by the iterative decoding circuit to output the temporary hard-decision decoding result as a decoding result when a result of the comparison satisfies a stopping condition set in advance.