Transmission device for point cloud data, method performed by transmission device, reception device for point cloud data, and method performed by reception device

A reception apparatus of point cloud data, the apparatus comprising:

• memory;
• and
• at least one processor, the processor configured to:
• obtain parameter sets necessary for the random access from the point cloud data, based on that a request for a random access from a first sample among samples within the point cloud data is occurred, and
• decode the first sample and one or more samples that follow the first sample in decoding order, based on the obtained parameter sets, and
• wherein the parameter sets are obtained from either a sample entry of a track including the first sample or a predetermined sample, based on at least one of a sample entry type of the track, a presence of a sync sample box or a presence of parameter set sample group boxes.

A method performed by a transmitting apparatus of point cloud data, the method comprising:

• storing a bitstream including the point cloud data into one or more tracks;
• and
• generating a geometry-based point cloud compression (G-PCC) file based on the tracks,
• wherein parameter sets necessary for a random access from a first sample within the point cloud data are included in either a sample entry of a track including the first sample or a predetermined sample, based on at least one of a sample entry type of the track, a presence of a sync sample box or a presence of parameter set sample group boxes.

A transmitting apparatus of point cloud data, the apparatus comprising:

• memory;
• and
• at least one processor, the at least one processor configured to:
• store a bitstream including the point cloud data into one or more tracks, and
• generate a geometry-based point cloud compression (G-PCC) file based on the tracks, and
• wherein parameter sets necessary for a random access from a first sample within the point cloud data are included in either a sample entry of a track including the first sample or a predetermined sample, based on at least one of a sample entry type of the track, a presence of a sync sample box or a presence of parameter set sample group boxes.