Importance

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Abstract

According to one embodiment, an error correction decoder includes a selecting section, calculating section, check section, and updating section. The selecting section selects data used for matrix processing applied to a process target row from LLR data stored in the first memory section based on a check matrix, and stores the data in a second memory section. The calculating section executes the matrix processing based on the data stored in the second memory section, and writes updated data back to the second memory section. The check section checks a parity based on a calculating result of the calculating section. The updating section updates the LLR data of the first memory section based on the updated data of the second memory section.

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First Claim