Patent ID: 11943274
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. Apparatus for downloading an ROI-specific video stream by tile-based video streaming, the apparatus comprising a processor implemented system configured to
inspect a manifest file so as to, depending on an ROI,
identify and download a set of bit streams along with an extractor, the set of bitstreams having encoded thereinto mutually different portions of a video picture area;
compile, using the extractor, a compiled bitstream out of the set of bitstreams by extracting, from each of the set of bitstreams, a picture portion relating to a current picture frame by parsing the respective bitstream and forming the compiled bitstream out of the extracted picture portions so that the compiled bitstream comprises a sub-picture portion for the picture portion of each of the set of bitstreams the compiled bitstream is formed of; and
identify a predetermined subpicture portion out of the subpicture portions of the compiled bitstream on the basis of signaling in at least one of the extractor or the sub-picture portions,
decrypt a coding payload section of the predetermined subpicture portion of the subpicture portions of the compiled bitstream by finding a border of the coding payload section of the predetermined subpicture portion to be decrypted by
parsing the coding payload section up to a currently decrypted position and/or

deriving a length of the coding payload section from a header within the one predetermined subpicture portion, and/or
using a bitstream length or pointer indication signaled within the bitstream from which the picture portion is extracted which the predetermined subpicture portion belongs to.