Video stream transmission method and related device and system
摘要
說明書
A spatial object (Spatial Objects) is a part of space of a content component. In other words, a content component includes a plurality of spatial objects. In general, during application to a VR video, it can be understood that the VR video includes sub videos corresponding to a plurality of fields of view. An identifier of a media representation is an identifier of a sub video stream. Viewport information of a user of the client is spatial object information. To be specific, in this embodiment of the present disclosure, a VR content component may be a VR video. The target spatial object may be a part of a viewport, in the VR video, that needs to be presented upon request by the user, and may be referred as a region of interest (Region of Interest, ROI). In machine visual and picture processing, a to-be-processed region in a processed picture is outlined by a box, a circle, an ellipse, an irregular polygon, or the like and is referred to as a region of interest.
A difference between a VR video and a normal video lies in that entire video content of the normal video is presented to a user, and only a subset (a sub video) of the entire video of the VR video is presented. To be specific, when the VR video (or a 360-degree video or an omnidirectional video (Omnidirectional video)) is presented on a head-mounted device or a handheld device, only an area of an orientation corresponding to the head of the user in the VR video and associated audio are finally presented. Therefore, the target spatial location information carried in the target request may be considered as a region of a viewport that the user is currently interested in and that needs to be presented. It can be understood that the target request may be triggered by an angle movement of the client, or may be triggered by a related input instruction of the user or the like. The present disclosure sets no limitation thereto.
