公开(公告)号：US11418219B2

公开(公告)日：2022-08-16

申请号：US17005270

申请日：2020-08-27

Applicant: KIOXIA CORPORATION

Inventor： Ryota Yoshizawa ,  Kenichiro Furuta ,  Yuma Yoshinaga ,  Osamu Torii ,  Tomoya Kodama

IPC: H03M13/29 ,  G06N3/08 ,  H03M13/45

Abstract: According to one embodiment, a learning device includes a noise generation unit, a decoding unit, a generation unit, and a learning unit. The noise generation unit outputs a second code word which corresponds to a first code word to which noise has been added. The decoding unit decodes the second code word and outputs a third code word. The generation unit generates learning data for learning a weight in message passing decoding in which the weight and a message to be transmitted are multiplied, based on whether or not decoding of the second code word into the third code word has been successful. The learning unit determines a value for the weight in the message passing decoding by using the learning data.

公开(公告)号：US11567830B2

公开(公告)日：2023-01-31

申请号：US17184166

申请日：2021-02-24

Applicant: Kioxia Corporation

Inventor： Yuma Yoshinaga ,  Tomoya Kodama ,  Osamu Torii ,  Kenichiro Furuta ,  Ryota Yoshizawa

IPC: G11C29/00 ,  G06F11/10 ,  G06N3/08 ,  G06N3/04 ,  H03M13/45

Abstract: A memory system includes a non-volatile memory and a memory controller. The memory controller is configured to read a received word from the non-volatile memory, estimate noise by using a plurality of different models for estimating the noise included in the received word to obtain a plurality of noise estimation values, select one noise estimation value from the plurality of noise estimation values, update the received word by using a value obtained by subtracting the selected noise estimation value from the read received word, and decode the updated received word by using a belief-propagation method.