| 摘要 |
According to one embodiment, a memory system includes a semiconductor memory, a converter configured to convert an input data input from the semiconductor memory into a log likelihood ratio based on a conversion function, a conversion function optimizing unit configured to optimize the conversion function used for the converter, and a decoding operation unit configured to input the log likelihood ratio output from the converter to execute a decoding operation of an error correcting code. The conversion function optimizing unit optimizes the conversion function based on information related to a number of times of using the semiconductor memory.
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