公开(公告)号：WO2020112321A2

公开(公告)日：2020-06-04

申请号：PCT/US2019/060238

申请日：2019-11-07

Applicant: APPLE INC.

Inventor： YANG, Xiaohua ,  TOURAPIS, Alexandros ,  ZHANG, Dazhong ,  YUAN, Hang ,  WU, Hsi-Jung ,  KIM, Jae Hoon ,  ZHAI, Jiefu ,  CHEN, Ming ,  ZHOU, Xiaosong

IPC: H04N21/81 ,  H04N21/4728 ,  H04N21/6587 ,  H04N21/63 ,  H04N21/2343 ,  H04N21/84 ,  H04N21/845 ,  H04N21/442 ,  H04N19/00

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

公开(公告)号：WO2020055655A1

公开(公告)日：2020-03-19

申请号：PCT/US2019/049678

申请日：2019-09-05

Applicant: APPLE INC.

Inventor： TOURAPIS, Alexandros ,  ZHANG, Dazhong ,  YUAN, Hang ,  WU, Hsi-Jung ,  KIM, Jae Hoon ,  ZHAI, Jiefu ,  CHEN, Ming ,  ZHOU, Xiaosong

IPC: H04N19/167 ,  H04N19/187 ,  H04N21/218

Abstract: Aspects of the present disclosure provide techniques for reducing latency and improving image quality of a viewport extracted from multi-directional video communications. First streams of coded video data are received from a source. The first streams include coded data for each of a plurality of tiles representing a multi-directional video, where each tile corresponding to a predetermined spatial region of the multi-directional video, and at least one tile of the plurality of tiles in the first streams contains a current viewport location at a receiver. The techniques include decoding the first streams and displaying the tile containing the current viewport location. When the viewport location at the receiver changes to include a new tile of the plurality of tiles, retrieving and decoding first streams for the new tile, displaying the decoded content for the changed viewport location, and transmitting the changed viewport location to the source.