Learning device

A learning device, comprising:

• a processor connected to a memory unit, the processor being configured to:
• receive a first code word and generate a second code word from the first code word, the second code word being the first code word with noise added;
• decode the second code word and output a third code word as a decoding result;
• and
• generate learning data including the second code word for which the third code word matches the first code word;
• and
• determine a weight for a message passing decoding from the learning data, the weight being multiplied with a message transmitted in the message passage decoding.

A memory system, comprising:

• a memory controller including:
• a host interface for receiving data from a host device,
• a memory interface for receiving data from a memory unit,
• an error correction encoding/decoding unit for encoding and decoding data to be written to and read from the memory unit,
• a data buffer for storing data to be written to the memory unit and data read from the memory unit, and
• a learning device including a decoding unit, a generation unit configured to generate learning data, and a learning unit configured to receive the learning data and determine a weight for a message passing decoding using the learning data, wherein
• the memory controller is configured to:
• receive first data from the host device via the host interface,
• encode the first data using the error correction encoding/decoding unit to generate a first code word,
• store the first code word in the data buffer,
• write the first code word to a first location in the memory unit via the memory interface,
• read data from the first location of the memory unit via the memory interface, and
• supply the read data to the decoding unit as a second code word;
• the decoding unit is configured to output a decoding resulting of the second code word as a third code word to the generation unit;
• the generation unit is configured to:
• generate learning data including the second code word for which the corresponding third code word matches the first code word, and
• supply the learning data to the learning unit;
• and
• the learning unit is configured to determine a weight for a message passing decoding using the learning data.