公开(公告)号：US11469881B2

公开(公告)日：2022-10-11

申请号：US16721986

申请日：2019-12-20

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jae Wan Shim ,  Heon Phil Ha

IPC: H04L29/06 ,  H04L9/32 ,  H04L9/06

Abstract: Provided are an apparatus and method for forgery prevention of digital information. The apparatus for forgery prevention of digital information includes: a digital information obtaining unit configured to obtain digital information in real time; a seed value generator configured to generate a seed value carrying characteristics of the digital information obtained using the digital information obtaining unit; an information piece generator configured to divide the digital information obtained using the digital information obtaining unit, into continuous information pieces with a sequence; and a hash value generator configured to generate a hash value of a first information piece from the seed value and the first information piece and generate a hash value of a subsequent information piece by using a hash value of a previous information piece and the subsequent information piece as inputs.

公开(公告)号：US10803882B2

公开(公告)日：2020-10-13

申请号：US16546440

申请日：2019-08-21

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jae Wan Shim ,  Heon Phil Ha

IPC: G10L21/028 ,  G10L25/30 ,  H04R1/34 ,  H04R1/40 ,  H04R3/00

Abstract: A sound source separating apparatus may include: a housing; a plurality of microphones positioned on the housing; a plurality of sound guides positioned on the housing to be adjacent to the plurality of microphones, and configured to guide sound to the plurality of microphones and to generate a difference between a plurality of sound information respectively arriving at the plurality of microphones according to a direction of a sound source; and a processor configured to separate the sound source according to the direction of the sound source based on the plurality of sound information received by the plurality of microphones.

公开(公告)号：US12014292B2

公开(公告)日：2024-06-18

申请号：US16250891

申请日：2019-01-17

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jae Wan Shim

IPC: G06F30/28 ,  G06F17/18 ,  G06F30/20 ,  G06F30/25 ,  G06N7/01 ,  G06F111/10

CPC classification number: G06N7/01 ,  G06F17/18 ,  G06F30/20 ,  G06F30/25 ,  G06F30/28 ,  G06F2111/10

Abstract: A method for optimally simulating fluid flow around a real object by (a) defining an initial state of a simulation space having a plurality of lattices with nodes; determining a space occupation state by objects, a fluid state, and a probability distribution state of a particle for respective nodes; generating a flow effect for the respective nodes using a collision rule which is a probability distribution of the particle with respect to the velocity thereof, obtained by satisfying a condition at which a Tsallis or a Rényi-divergence between the collision rule itself and a reference collision rule provides a simulated fluid flow result; and renewing the initial state and varying the space occupation state based on the simulated fluid flow result; and (b) based on step (a) modeling fluid flow around the real object.

公开(公告)号：US12256170B2

公开(公告)日：2025-03-18

申请号：US17377837

申请日：2021-07-16

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jae Wan Shim ,  Heon Phil Ha

IPC: H04N7/015 ,  G06T3/60 ,  G06T5/70 ,  G06V40/16

Abstract: Disclosed are a method of transmitting image data having a hybrid resolution and a method of generating a hybrid-resolution image. A main region of an original image is transmitted as a high-resolution image and the remaining regions are transmitted as a low-resolution background image. Accordingly, an amount of data to be transmitted is able to be reduced.