US 11,683,460 B2
Method and apparatus for buffer management in cloud based virtual reality services
Ji Hoon Yun, Seoul (KR)
Assigned to FOUNDATION FOR RESEARCH AND BUSINESS, SEOUL NATIONAL UNIVERSITY OF SCIENCE AND TECHNOLOGY, Seoul (KR)
Filed by FOUNDATION FOR RESEARCH AND BUSINESS, SEOUL NATIONAL UNIVERSITY OF SCIENCE AND TECHNOLOGY, Seoul (KR)
Filed on Oct. 5, 2021, as Appl. No. 17/494,808.
Application 17/494,808 is a continuation of application No. 17/098,325, filed on Nov. 14, 2020, granted, now 11,463,670.
Application 17/098,325 is a continuation of application No. 16/515,175, filed on Jul. 18, 2019, granted, now 10,869,013, issued on Dec. 15, 2020.
Claims priority of application No. 10-2018-0140596 (KR), filed on Nov. 15, 2018.
Prior Publication US 2022/0030208 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 13/00 (2018.01); H04N 13/111 (2018.01); H04N 13/264 (2018.01); H04N 13/156 (2018.01); H04N 13/194 (2018.01); H04N 13/279 (2018.01)
CPC H04N 13/111 (2018.05) [H04N 13/156 (2018.05); H04N 13/194 (2018.05); H04N 13/264 (2018.05); H04N 13/279 (2018.05); H04N 2013/0085 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A buffer management method performed by a server to provide a cloud-based virtual reality service, comprising:
receiving user's motion information from a user terminal via a network;
calculating user's first viewpoint based on user's first motion information among the received user's motion information;
calculating user's second viewpoint based on user's second motion information subsequent to the first motion information among the received user's motion information;
determining a plurality of image tiles corresponding to a content to be displayed on the user terminal based on the first viewpoint; and
transmitting modified image tiles obtained by modifying the plurality of image tiles to the user terminal via the network,
wherein the modified image tiles are modified based on the second viewpoint according to a difference between the first viewpoint and the second viewpoint with a predetermined value, and
wherein the modified image tiles are modified by deleting image tiles that is not consistent with the second viewpoint among the plurality of image tiles,
wherein the modified images tiles are modified by arranging the plurality of image tiles in an ascending order of distance.