Method, apparatus and computer program product for signaling information of a media track

A method comprising:

• defining or utilizing file format syntax elements to indicate samples, wherein at least one of the samples comprises one or more description documents, wherein the one or more description documents comprise three dimensional information, and wherein at least another of the samples comprises one or more updates to at least one description document of the one or more description documents;
• defining or utilizing the file format syntax elements to indicate a relationship between the at least one sample comprising the one or more description documents and the at least another sample comprising the one or more updates;
• and
• defining an update mode in a sample entry, wherein the update mode indicates how a sample is configured to update a scene, and wherein an update of the sample is associated with a latest sample in a decoding order when the update mode is set to zero, and wherein the update to the sample is associated with a latest sync sample in the decoding order when the update mode is set to one.

A non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following:

• defining or utilizing file format syntax elements to indicate samples, wherein the at least one of the samples comprises one or more description documents, wherein the one or more description documents comprise three dimensional information, and wherein at least another of the samples comprises one or more updates to at least one description document of the one or more description documents;
• defining or utilizing the file format syntax elements to indicate a relationship between the at least one sample comprising one the or more description documents and the at least another sample comprising the one or more updates;
• and
• defining an update mode in a sample entry, wherein the update mode indicates how a sample is configured to update a scene, and wherein an update of the sample is associated with a latest sample in a decoding order when the update mode is set to zero, and wherein the update to the sample is associated with a latest sync sample in the decoding order when the update mode is set to one.