Patent ID: 11886487
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A device for generating a media file from a timed sequence of media data comprising samples, the device comprising:
a memory device that stores a set of instructions; and
at least one processor that executes the set of instructions to perform the following steps:
generating a track comprising at least one of the samples;
generating a first data structure assigning a subset of samples or subsamples of the track to one or more groups of samples; and
generating a media file including the track, the samples, and the first data structure;
wherein:
the first data structure comprises data indicating, when set to a first value, that a group description index value associated with each group of samples in the first data structure is an index of a set of one or more property values in a second data structure, and when set to a second value, that the group description index value associated with each group of samples in the first data structure contains one or more property values.