公开(公告)号：US20220308595A1

公开(公告)日：2022-09-29

申请号：US17524432

申请日：2021-11-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yoola HWANG ,  Jae Young AHN ,  Jihun CHA

IPC: G05D1/06 ,  G01W1/02 ,  G01S19/42 ,  B64C39/02

Abstract: Disclosed are a method and system for precise height positioning based on global navigation satellite system (GNSS). A precise height positioning method may include determining an orthometric height based on a barometric pressure and a temperature of a region where an unmanned aerial vehicle is located, determining a geoid height in accordance with GNSS positioning information of the unmanned aerial vehicle, and determining a final altitude based on a difference between an ellipsoidal height in accordance with the orthometric height and the geoid height and an ellipsoidal height included in the GNSS positioning information.

公开(公告)号：US20240114163A1

公开(公告)日：2024-04-04

申请号：US18468427

申请日：2023-09-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Eun Young CHANG ,  Euee S JANG ,  Xin LI ,  Jihun CHA ,  Tianyu DONG ,  Jae Young AHN

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/172

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/172

Abstract: Disclosed is an encoder which receives first to third input frames included first intra period and outputs a bitstream corresponding to the third input frame. The encoder includes a motion compensation unit that generates a first reference frame corresponding to the first input frame and a second reference frame corresponding to the second input frame, a union operation unit that generates an overlap frame by performing a union operation based on the first reference frame and the second reference frame, and an inter prediction unit that generates an occupancy code by performing an inter prediction operation on the overlap frame and the third input frame. In this case, the bitstream includes the occupancy code.