公开(公告)号：US20220350862A1

公开(公告)日：2022-11-03

申请号：US17607847

申请日：2020-11-26

Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Young Joo LEE ,  Young Seok KIM ,  Seung Woo HONG

IPC: G06F17/16 ,  H03M13/37 ,  H03M13/00

Abstract: A subspace pursuit apparatus for compressive sensing reconstruction includes: a first inner product unit configured to calculate a correlation between a residual vector and column vectors of a sensing matrix by calculating an inner product of them; a first sorting unit coupled to the first inner product unit and configured to select K column vector indices having highest correlations, where K is a sparsity level; a second inner product unit configured to calculate a matrix for calculating a pseudo-inverse matrix required for solving a least-squares from the sensing matrix to store in the Gram matrix buffer; a Cholesky inversion unit configured to perform a Cholesky decomposition of the matrix stored in the Gram matrix buffer and calculate an inverse of a decomposed matrix; and a sparse solution estimator configured to estimate the sparse solution from a matrix value of the matrix based on the inverse of the decomposed matrix.

公开(公告)号：US20220139279A1

公开(公告)日：2022-05-05

申请号：US17517555

申请日：2021-11-02

Applicant: POSTECH Research and Business Development Foundation

Inventor： Ji Hyung KIM ,  Young Seok KIM ,  Sungeun PARK ,  Wook Sung KIM

IPC: G09G3/00 ,  G06T7/90 ,  G09G3/34

Abstract: A switchable display system for providing virtual reality or augmented reality using a color calibration display apparatus may comprise: an augmented reality data server configured to provide virtual reality and augmented reality information; and a color calibration display apparatus using a color calibration display module configured to perform color calibration according to ambient illuminance in a use environment.

公开(公告)号：US20220108545A1

公开(公告)日：2022-04-07

申请号：US17422161

申请日：2020-01-14

Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Young Joo LEE ,  Young Seok KIM ,  Gun Ho PARK ,  Hyun Hoon LEE

IPC: G06V10/82 ,  G06N3/04

Abstract: The present disclosure provides is a high-speed image recognition method and apparatus using a 3D CNN. The high-speed image recognition method using the 3D CNN includes: inputting each of a first image clips among image clips constituting an input image to the 3D CNN; acquiring softmax function values calculated in the 3D CNN with respect to each of the first image clips; calculating a score margin by using the softmax function values; comparing the score margin with a predetermined threshold value to determine whether to input at least one additional image clip other than the first image clips among the image clips constituting the input image to the 3D CNN. Therefore, a calculation speed for image recognition can be improved.

公开(公告)号：US20240178938A1

公开(公告)日：2024-05-30

申请号：US18458945

申请日：2023-08-30

Applicant: POSTECH Research and Business Development Foundation

Inventor： Youngjoo LEE ,  Young Seok KIM ,  Dain PARK

IPC: H04L1/00

CPC classification number: H04L1/0063 ,  H04L1/0052

Abstract: A polar code-based decoding method may comprise: converting a plurality of LLRs of calculation-target bits into a plurality of absolute (ABS) LLR values; sorting the plurality of ABS LLR values in order of size so that a minimum ABS LLR value is designated from among the plurality of ABS LLR values; multiplying the minimum ABS LLR value by a preset weight; and updating path metrics (PMs) of the calculation-target bits in an order in which the plurality of ABS LLR values are sorted, wherein the updating of the PMs of the calculation-target bits comprises, even when a specific ABS LLR value of a specific calculation-target bit is equal or similar to the minimum ABS LLR value, updating a PM of the specific calculation-target bit with the minimum ABS LLR value multiplied by the preset weight.