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 |
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.
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