Methods, devices, and computer programs for streaming partitioned timed media data

A device for receiving streamed timed media data organized into temporal media segments, the timed media data belonging to partitioned timed media data comprising timed samples, each timed sample comprising a plurality of subsamples, the timed media data being transmitted as at least one media segment file comprising independently encapsulated components comprising at least one partition component containing a subsample selected from among the plurality of subsamples of one of the timed samples and one corresponding subsample of each of the other timed samples and at least one reference component comprising at least one extractor identifying at least one partition component, the device comprising at least one microprocessor configured for carrying out the steps of:

• receiving a manifest describing a plurality of versions of the partitioned timed media data, the manifest comprising representations, each representation
• comprising at least a description of a version of a portion of the partitioned timed media data, at least one said representation comprising a description of a plurality of components among which at least one component is required to reconstruct at least partially the partitioned timed media data and among which at least one component is an optional component that can be selected to reconstruct at least a portion of the partitioned timed media data;
• selecting at least one optional component that can be selected to reconstruct at least a portion of the partitioned timed media data;
• requesting the at least one component that is required to reconstruct at least partially the partitioned timed media data and the at least one selected optional component that can be selected to reconstruct at least a portion of the partitioned timed media data;
• and
• on reception of the requested components:
• parsing the at least one component that is required to reconstruct at least partially the partitioned timed media data;
• and
• generating a playable media representation bit-stream from the parsed at least one component, the playable media representation bit-stream being generated as a function of media data of the at least one selected optional component determined as a function of the parsed data of the at least one component that is required to reconstruct at least partially the partitioned timed media data.