Patents by Inventor Seok-Ju HAN

Seok-Ju HAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • LDPC decoder, semiconductor memory system and operating method thereof
    Patent number: 10997021
    Abstract: A semiconductor memory system including: a semiconductor memory device suitable for storing a codeword; and an LDPC decoder suitable for decoding the codeword to generate decoded data, wherein the LDPC decoder includes: a message passing decoding component suitable for performing a first decoding operation of decoding the codeword, and calculating the minimum value among numbers of UCNs; and an error path detection component suitable for detecting error path candidates using a tree in which each of UCNs corresponding to the minimum value is set to a root node, sorting the detected error path candidates in ascending order of maximum LLRs, resetting symbol values and LLRs of variable nodes in the error path candidates, and providing the message passing decoding unit with information on the reset symbol values and LLRs.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: May 4, 2021
    Assignees: SK hynix Inc., Korea Advanced Institute of Science and Technology
    Inventors: Jeong-Seok Ha, Seok-Ju Han, Ji-Eun Oh
  • LDPC DECODER, SEMICONDUCTOR MEMORY SYSTEM AND OPERATING METHOD THEREOF
    Publication number: 20200218607
    Abstract: A semiconductor memory system including: a semiconductor memory device suitable for storing a codeword; and an LDPC decoder suitable for decoding the codeword to generate decoded data, wherein the LDPC decoder includes: a message passing decoding component suitable for performing a first decoding operation of decoding the codeword, and calculating the minimum value among numbers of UCNs; and an error path detection component suitable for detecting error path candidates using a tree in which each of UCNs corresponding to the minimum value is set to a root node, sorting the detected error path candidates in ascending order of maximum LLRs, resetting symbol values and LLRs of variable nodes in the error path candidates, and providing the message passing decoding unit with information on the reset symbol values and LLRs.
    Type: Application
    Filed: November 21, 2019
    Publication date: July 9, 2020
    Inventors: Jeong-Seok HA, Seok-Ju HAN, Ji-Eun OH