Forming one or more tile streams on the basis of one or more video streams

Abstract

Methods and systems are described for forming one or more tile streams comprising: providing media data of at least one composite video stream to the input of at least one encoder, the media data of said composite video stream representing video frames comprising an image region having one or more subregions, each of said one or more subregions comprising visual content of one of said one or more video streams; providing encoder information to said encoder for configuring said encoder to generate encoded media data representing tiled video frames, a tile in said tiled video frames matching at least one of said one or more subregions; encoding media data of said composite video stream, wherein media data associated with a subregion of a video frame are encoded into independently encoded media data that have no spatial decoding dependency on media data of other subregions in said video frame, said independently encoded media data forming a tile of a tiled video frame, preferably said tile being arranged in said image region on the basis of a tile grid; and, storing said encoded media data as one or more tile streams on a storage medium, preferably on a storage medium of one or more network nodes, a tile stream comprising media data of at least one tile and tile position information for signaling a decoder to decode the media data of said tile stream into tiled video frames comprising a tile at a position as indicated by the tile position information.