Video stream transmission method and related device and system
摘要
說明書
An MPD describes spatial relationships (namely spatial relationships) between spatial objects (namely Spatial Objects). A spatial object is defined as some space of a content component, for example, an existing region of interest (English: region of interest, ROI) and a tile. A spatial relationship may be described in an adaptation set and a sub-representation. In the existing DASH standard, some descriptor elements are defined in the MPD, and each descriptor element has two properties: schemeIdURI and value. The schemeIdURI describes what the current descriptor is, and the value is a parameter value of the descriptor. The existing standard already has two descriptors: SupplementalProperty and EssentialProperty (which are a supplemental property descriptor and an essential property descriptor). In the existing standard, if schemeIdURI of the two descriptors=“urn:mpeg:dash:srd:2014” or (schemeIdURI=urn:mpeg:dash:VR:2017), it indicates that the descriptors describe spatial information associated to a spatial object (spatial information associated to the containing Spatial Object.), and a series of parameter values of an SDR are listed in a corresponding value. Table 1 describes syntax of specific values.
