Point cloud data transmission device, point cloud data transmission method, point cloud data reception device, and point cloud data reception method

1. A method for transmitting point cloud data, the method comprising:

encoding the point cloud data;

encapsulating a file including video component tracks carrying the point cloud data and a track for a plurality of atlas data of the point cloud data; and

transmitting the file,

wherein the track for atlas data includes a sample entry including an atlas identifier of atlas data for the point cloud data, wherein the sample entry further includes parameter set information for the atlas data,

wherein the file further includes an atlas sample entry including identifier information related to an atlas tile, and number information related to a number of atlas tiles,

wherein the plurality of the atlas data are grouped based on a grouping type,

wherein one or more video component tracks related to a specific atlas identifier are grouped among the video component tracks, and

wherein the file further includes a timed metadata track for dynamic spatial regions in the point cloud data, and the timed metadata track includes an identifier for atlas data for dynamic spatial regions.

2. The method of claim 1 ,

wherein the identifier information represents that the atlas data includes one or more atlas tiles for the point cloud data.

3. The method of claim 1 ,

wherein the file further includes component track information for the atlas data based on the atlas identifier.

4. The method of claim 1 ,

wherein the file further includes spatial region information including the identifier information for a spatial region of the point cloud data.

5. An apparatus configured to transmit point cloud data, the apparatus comprising:

an encoder configured to encode the point cloud data;

an encapsulator configured to encapsulate a file including video component tracks carrying the point cloud data and a track for a plurality of atlas data of the point cloud data; and

a transmitter configured to transmit the file,

wherein the track for atlas data includes a sample entry including an atlas identifier of atlas data for the point cloud data, wherein the sample entry further includes parameter set information for the atlas data,

wherein the file further includes an atlas sample entry including identifier information related to an atlas tile, and number information related to a number of atlas tiles,

wherein the plurality of the atlas data are grouped based on a grouping type,

wherein one or more video component tracks related to a specific atlas identifier are grouped among the video component tracks, and

wherein the file further includes a timed metadata track for dynamic spatial regions in the point cloud data, and the timed metadata track includes an identifier for atlas data for dynamic spatial regions.

6. A method for receiving point cloud data, the method comprising:

receiving a file including video component tracks carrying point cloud data and a track for a plurality of atlas data of the point cloud data;

decapsulating the file; and

decoding the point cloud data,

wherein the track for atlas data includes a sample entry including an atlas identifier of atlas data for the point cloud data, wherein the sample entry further includes parameter set information for the atlas data,

wherein the file further includes an atlas sample entry including identifier information related to an atlas tile, and number information related to a number of atlas tiles,

wherein the plurality of the atlas data are grouped based on a grouping type,

wherein one or more video component tracks related to a specific atlas identifier are grouped among the video component tracks, and

wherein the file further includes a timed metadata track for dynamic spatial regions in the point cloud data, and the timed metadata track includes an identifier for atlas data for dynamic spatial regions.

7. The method of claim 6 ,

wherein the identifier information represents that the atlas data includes one or more atlas tiles for the point cloud data.

8. The method of claim 6 ,

wherein the file further includes component track information for the atlas data based on the atlas identifier.

9. The method of claim 6 ,

wherein the file further includes spatial region information including the identifier information for a spatial region of the point cloud data.

10. An apparatus configured to receive point cloud data, the apparatus comprising:

a memory; and

a processor connected to the memory, wherein the processor is configured to:

receive a file including video component tracks carrying point cloud data and a track for a plurality of atlas data of the point cloud data;

decapsulate the file; and

decode the point cloud data,

wherein the track for atlas data includes a sample entry including an atlas identifier of atlas data for the point cloud data, wherein the sample entry further includes parameter set information for the atlas data,

wherein the file further includes an atlas sample entry including identifier information related to an atlas tile, and number information related to a number of atlas tiles,

wherein the plurality of the atlas data are grouped based on a grouping type,

wherein one or more video component tracks related to a specific atlas identifier are grouped among the video component tracks, and

wherein the file further includes a timed metadata track for dynamic spatial regions in the point cloud data, and the timed metadata track includes an identifier for atlas data for dynamic spatial regions.

11. The apparatus of claim 10 ,

wherein the identifier information represents that the atlas data includes one or more atlas tiles for the point cloud data.

12. The apparatus of claim 10 ,

wherein the file further includes component track information for the atlas data based on the atlas identifier.

13. The apparatus of claim 10 ,

wherein the file further includes spatial region information including the identifier information for a spatial region of the point cloud data.