公开(公告)号：US11025880B2

公开(公告)日：2021-06-01

申请号：US16713797

申请日：2019-12-13

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junhwan Jang ,  Woochool Park ,  Youngwha Kim ,  Jinwook Yang ,  Sangpil Yoon ,  Hyunwook Kim ,  Eunkyung Cho ,  Minsu Choi ,  Junsuk Lee ,  Jaeyoung Yang

IPC: H04N13/117 ,  H04N13/194 ,  H04N13/344 ,  H04N21/23 ,  H04N21/47 ,  H04L29/06 ,  H04N13/00

Abstract: A region of interest (ROI)-based virtual reality (VR) content streaming server and a method are disclosed. The streaming server includes a communication unit that receives a request signal for a media presentation description (MPD) file regarding tiles of a tiled video, ROI) information, and a request signal for a segment file from an electronic device, and transmits the MPD file and the segment file corresponding to the request signal to the electronic device. The streaming server further includes a controller configured to, when the request signal for the MPD file is received, control the MPD file corresponding to the request signal to be transmitted to the electronic device.

公开(公告)号：US12198279B2

公开(公告)日：2025-01-14

申请号：US18056144

申请日：2022-11-16

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junhwan Jang ,  Woochool Park ,  Jinwook Yang ,  Minsu Choi ,  Junsuk Lee ,  Bonjae Koo

IPC: G06T19/00 ,  H04N13/167 ,  H04N13/194

Abstract: An edge server for providing a virtual reality (VR) image is proposed. The server may include a rendering synchronization unit synchronizing a visual field and a margin with a virtual reality device. The server may also include a rendering unit generating a rendered image by rendering a visual field area corresponding to the visual field and a margin area corresponding to the margin based on a rotation center in an entire virtual reality image. The server may further include an encoding unit generating a reduced margin area by dividing a resolution of the margin area by a scaling factor, and encoding the visual field area and the reduced margin area to generate a split virtual reality image including the encoded visual field area and the encoded reduced margin area. The server may further include a streaming transmission unit transmitting the split virtual reality image to the virtual reality device.

公开(公告)号：US11951394B2

公开(公告)日：2024-04-09

申请号：US17235528

申请日：2021-04-20

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junhwan Jang ,  Woochool Park ,  Jinwook Yang ,  Sangpil Yoon ,  Minsu Choi ,  Junsuk Lee ,  Suho Song ,  Bonjae Koo

IPC: H04N23/698 ,  A63F13/5252

CPC classification number: A63F13/5252 ,  H04N23/698

Abstract: An image acquisition apparatus for acquiring an in-game 360 virtual reality (VR) image by using a plurality of virtual cameras includes a virtual camera group taking in-game images by using the plurality of virtual cameras. The image acquisition apparatus may also include a renderer generating textures for the taken images, generating a panoramic image by performing an equirectangular projection (ERP) mapping of the generated textures, and encoding the generated panoramic image. The image acquisition apparatus may further include an image generator generating a 360 VR image by combining audio information with the encoded panoramic image.

公开(公告)号：US11115639B2

公开(公告)日：2021-09-07

申请号：US16198562

申请日：2018-11-21

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woochool Park ,  Junhwan Jang ,  Younghwa Kim ,  Jinwook Yang ,  Sangpil Yoon ,  Hyunwook Kim ,  Eunkyung Cho ,  Minsu Choi ,  Junsuk Lee ,  Jaeyoung Yang

IPC: H04N13/133 ,  H04N5/247 ,  G06T3/40 ,  H04N5/232 ,  H04N13/246

Abstract: The described technology provides a system and method of generating a 360-degree panoramic virtual reality (VR) image by using a plurality of photograph images. A plurality of image capturing devices capture and transmit the plurality of photograph images, respectively. An image conversion device receives the plurality of photograph images from the plurality of image capturing devices, calibrates each of the plurality of photograph images using characteristic information of respective one of the plurality of image capturing devices, and stitches calibrated photograph images to generate the 360-degree panoramic VR image. According to embodiments, the user can check a situation of a monitoring area while changing the viewpoint of the 360-degree panoramic VR image or enjoy the generated VR contents at a high degree of immersion.

公开(公告)号：US11057605B2

公开(公告)日：2021-07-06

申请号：US16713417

申请日：2019-12-13

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jungwook Wee ,  Woochool Park

IPC: H04N13/194 ,  H04N13/178 ,  H04N13/161 ,  H04N13/00

Abstract: A 360-degree virtual reality (VR) video segmentation transmission system and a method are disclosed. The system includes a transmitter and a receiver. The transmitter designs a frame for transmitting a 360-degree VR video divided into multiple channels, based on a motion picture expert group (MPEG) transport stream (TS), and transmits a signal combining the designed frame and a header for each of the multiple channels. The receiver receives the signal from the transmitter for each channel, combines contents contained in the received signal through synchronization, and outputs the combined contents.

公开(公告)号：US10924782B2

公开(公告)日：2021-02-16

申请号：US16204972

申请日：2018-11-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woochool Park ,  Junhwan Jang ,  Youngwha Kim ,  Jinwook Yang ,  Sangpil Yoon ,  Hyunwook Kim ,  Eunkyung Cho ,  Minsu Choi ,  Junsuk Lee ,  Jaeyoung Yang

IPC: H04N21/2343 ,  H04N21/234 ,  H04N21/442

Abstract: The present disclosure provides a system for providing an image-segmentation based streaming service. The system includes a communication circuit configured to establish a communication channel with a streaming server, a storage configured to store data provided by the streaming server, a display configured to output an image, a processor functionally connected to the communication circuit, the storage, and the display. The processor can detect a region-of-interest (ROI) of an output image associated with a media presentation description (MPD) provided by the streaming server and transmit the ROI information to the streaming server. The processor can also receive image segments of a first resolution corresponding to the ROI information and a full image of a second resolution from the streaming server. The processor can also synthesize the image segments of the first resolution and the full image of the second resolution to output a synthesized reconstruction image through the display.