Method, device, and computer program for encapsulating scalable partitioned timed media data

A method for providing a timed media data bit-stream from partitioned timed media data encapsulated in a media segment file, in a client device, the partitioned timed media data comprising timed samples, each timed sample comprising a first layer and at least one second layer where at least one of the layers comprises a plurality of subsamples represented by one or more coding units, the media segment file comprising a track comprising at least one subsample selected from amongst the plurality of subsamples of one of the timed samples, the at least one subsample forming a subset of the set of the subsamples of the one of the timed samples, the method comprising:

• selecting an item of information representative of at least one subsample;
• requesting the track comprising the at least one subsample represented by the selected item of information;
• receiving the media segment file, the received media segment file comprising mapping metadata for providing information about the at least one subsample represented by the selected item of information, the mapping metadata being relative to the corresponding sample and the layer it belongs to;
• and
• recovering the at least one subsample represented by the selected item of information from the received media segment file as a function of the mapping metadata.

A device for encapsulating partitioned timed media data in a server, the partitioned timed media data comprising timed samples, each timed sample comprising a first layer and at least one second layer where at least one of the layers comprises a plurality of subsamples represented by one or more coding units, the device comprising at least one microprocessor configured for carrying out the steps of:

• obtaining at least one subsample from amongst the plurality of subsamples of one of the timed samples, the obtained subsamples forming a subset of the set of the subsamples of the one of the timed samples;
• creating one track comprising the at least one obtained subsample;
• and
• independently encapsulating the created track in at least one media segment file, said media segment file comprising mapping metadata for providing information about the at least one obtained subsample, the mapping metadata being relative to the one of the timed samples and the layer it belongs to.

A device for providing a timed media data bit-stream from partitioned timed media data encapsulated in a media segment file, in a client device, the partitioned timed media data comprising timed samples, each timed sample comprising a first layer and at least one second layer where at least one of the layers comprises a plurality of subsamples represented by one or more coding units, the media segment file comprising a track comprising at least one subsample selected from amongst the plurality of subsamples of one of the timed samples, the at least one subsample forming a subset of the set of the subsamples of the one of the timed samples, the device comprising at least one microprocessor configured for carrying out the steps of:

• selecting an item of information representative of at least one subsample;
• requesting the track comprising the at least one subsample represented by the selected item of information;
• receiving the media segment file, the received media segment file comprising mapping metadata for providing information about the at least one subsample represented by the selected item of information, the mapping metadata being relative to the corresponding sample and the layer it belongs to;
• and
• recovering the at least one subsample represented by the selected item of information from the received media segment file as a function of the mapping metadata.

A method for encapsulating partitioned timed media data in a server, the partitioned timed media data comprising timed samples, each timed sample comprising a plurality of subsamples represented by one or more coding units, the method comprising:

• obtaining at least one subsample from amongst the plurality of subsamples of one of the timed samples;
• creating a track comprising the at least one obtained subsample;
• and
• independently encapsulating the created track in at least one media segment file, the media segment file comprising mapping metadata for providing information about the at least one obtained subsample, the mapping metadata comprising an additional descriptor when the obtained subsamples correspond to partitions.

A method for providing a timed media data bit-stream from partitioned timed media data encapsulated in a media segment file, in a client device, the partitioned timed media data comprising timed samples, each timed sample comprising a plurality of subsamples represented by one or more coding units, the media segment file comprising a track comprising at least one subsample selected from amongst the plurality of subsamples of one of the timed samples, the method comprising:

• selecting an item of information representative of at least one subsample;
• requesting the track comprising the at least one subsample represented by the selected item of information;
• receiving the media segment file, the received media segment file comprising mapping metadata for providing information about the at least one subsample represented by the selected item of information, said mapping metadata including an additional descriptor when the subsamples of the requested track correspond to partitions;
• and
• recovering the at least one subsample represented by the selected item of information from the received media segment file as a function of the mapping metadata.

A device for encapsulating partitioned timed media data in a server, the partitioned timed media data comprising timed samples, each timed sample comprising a plurality of subsamples represented by one or more coding units, the device comprising at least one microprocessor configured for carrying out the steps of:

• obtaining at least one subsample from amongst the plurality of subsamples of one of the timed samples;
• creating a track comprising the at least one obtained subsample;
• and
• independently encapsulating the created track in at least one media segment file, the media segment file comprising mapping metadata for providing information about the at least one obtained subsample, the mapping metadata comprising an additional descriptor when the obtained subsamples correspond to partitions.

A device for providing a timed media data bit-stream from partitioned timed media data encapsulated in a media segment file, in a client device, the partitioned timed media data comprising timed samples, each timed sample comprising a plurality of subsamples represented by one or more coding units, the media segment file comprising a track comprising at least one subsample selected from amongst the plurality of subsamples of one of the timed samples, the device comprising at least one microprocessor configured for carrying out the steps of:

• selecting an item of information representative of at least one subsample;
• requesting the track comprising the at least one subsample represented by the selected item of information;
• receiving the media segment file, the received media segment file comprising mapping metadata for providing information about the at least one subsample represented by the selected item of information, said mapping metadata including an additional descriptor when the subsamples of the requested track correspond to partitions;
• and
• recovering the at least one subsample represented by the selected item of information from the received media segment file as a function of the mapping metadata.