Patent ID: 11871143
Assignee: LEMON INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An apparatus of processing visual media data, comprising a processor configured to implement a method comprising:
performing a conversion between visual media data and a visual media file that includes one or more tracks that store one or more bitstreams of the visual media data;
wherein the visual media data comprises one or more pictures comprising one or more subpictures or one or more slices;
wherein the visual media file stores the one or more tracks according to a format rule, and the visual media file includes a base track that references one or more subpicture tracks that store coded information for one or more subpictures of the visual media data;
wherein the format rule specifies that a track includes a sequence of the one or more slices or the one or more subpictures and the one or more slices or the one or more subpictures cover a rectangular area of the one or more pictures, and
wherein the format rule specifies that the base track includes a subpicture track reference to refer to the one or more subpicture tracks and an order of the one or more subpicture tracks referenced in the subpicture track reference indicates an order of samples of the one or more subpicture tracks in a video unit reconstructed from the one or more subpicture tracks.