File generation apparatus and file generation method as well as reproduction apparatus and reproduction method

A file generation method, wherein the method includes:

• generating a Media Presentation Description (MPD) file in which link information that specifies a plurality of tracks included in a quality file is described, wherein the MPD file is configured by assigning the plurality of tracks to respective plurality of quality information regarding quality of two or more depth images;
• and
• generating a plurality of AssociationIDs for the respective plurality of tracks as access information, wherein a respective AssociationID of the plurality of AssociationIDs is information to specify a respective depth image of the two or more depth images associated with a respective quality information of the plurality of quality information corresponding to a respective track of the plurality of tracks.

A reproduction method, wherein the method includes:

• acquiring, on a basis of a Media Presentation Description (MPD) file in which link information that specifies a plurality of tracks included in a quality file is described and configured by assigning the plurality of tracks to respective plurality of quality information regarding quality of two or more depth images, the quality information of at least part of the two or more depth images,
• wherein the MPD file includes a plurality of AssociationIDs for the respective plurality of tracks as access information, and
• wherein a respective Association ID of the plurality of Association IDs is information to specify a respective depth image of the two or more depth images associated with a respective quality information of the plurality of quality information corresponding to a respective track of the plurality of tracks.