Method and device for transmitting information on three-dimensional content including multiple view points
Provided is a method for transmitting metadata for omnidirectional content including a plurality of viewpoints. The method comprises identifying the metadata for the omnidirectional content including the plurality of viewpoints; and transmitting the identified metadata, wherein the metadata includes information about an identifier (ID) of a viewpoint group including at least one viewpoint of the plurality of viewpoints, and wherein the at least one viewpoint in the viewpoint group shares a common reference coordinate system.
1. A method for transmitting metadata for omnidirectional content including a plurality of viewpoints, the method comprising:
identifying the metadata for the omnidirectional content including the plurality of viewpoints; and
transmitting the identified metadata,
wherein the metadata comprises:
information about an identifier (ID) of a viewpoint group including at least one viewpoint of the plurality of viewpoints, wherein the at least one viewpoint in the viewpoint group shares a common reference coordinate system; and
information indicating yaw, pitch, and roll rotation angles, respectively, of X, Y, and Z axes of a global coordinate system of a viewpoint of the plurality of viewpoints, relative to the common reference coordinate system.
2. The method of claim 1 , wherein the metadata further comprises information about a description of the viewpoint group.
3. The method of claim 1 , wherein the metadata further comprises information indicating position of the viewpoint of the plurality of viewpoints in the common reference coordinate system.
4. The method of claim 1 , wherein the metadata further comprises information indicating a viewpoint switching mode for a viewpoint to be switched, when switching occurs between viewpoints in the viewpoint group, and
wherein the information indicating the viewpoint switching mode indicates one of a forward line of sight (LoS) mode, a backward LoS mode, a central estimation-based non-LoS mode, or an alignment group initial orientation switching mode.
5. The method of claim 1 ,
wherein the metadata further comprises information about an ID of each of the at least one viewpoint in the viewpoint group, and
wherein when media data for a viewpoint corresponding to the ID of each of the at least one viewpoint is carried in a collective group of tracks, the ID is set to be identical to an ID of the collective group of tracks.
6. A method for processing information about omnidirectional content including a plurality of viewpoints, the method comprising:
receiving metadata for the omnidirectional content including the plurality of viewpoints; and
processing media data for the omnidirectional content based on the received metadata,
wherein the metadata comprises:
information about an identifier (ID) of a viewpoint group including at least one viewpoint of the plurality of viewpoints, wherein the at least one viewpoint in the viewpoint group shares a common reference coordinate system, and
information indicating yaw, pitch, and roll rotation angles, respectively, of X, Y, and Z axes of a global coordinate system of a viewpoint of the plurality of viewpoints, relative to the common reference coordinate system.
7. The method of claim 6 , wherein the metadata further comprises information about a description of the viewpoint group.
8. The method of claim 6 , wherein the metadata further comprises information indicating position of the viewpoint of the plurality of viewpoints in the common reference coordinate system.
9. The method of claim 6 ,
wherein the metadata further comprises information indicating a viewpoint switching mode for a viewpoint to be switched, when switching occurs between viewpoints in the viewpoint group, and
wherein the information indicating the viewpoint switching mode indicates one of a forward line of sight (LoS) mode, a backward LoS mode, a central estimation-based non-LoS mode, or an alignment group initial orientation switching mode.
10. The method of claim 6 ,
wherein the metadata further comprises information about an ID of each of the at least one viewpoint in the viewpoint group, and
wherein when media data for a viewpoint corresponding to the ID of each of the at least one viewpoint is carried in a collective group of tracks, the ID is set to be identical to an ID of the collective group of tracks.
11. An apparatus for transmitting metadata for omnidirectional content including a plurality of viewpoints, the apparatus comprising:
a transceiver; and
a controller coupled to the transceiver,
wherein the controller is configured to:
identify the metadata for the omnidirectional content including the plurality of viewpoint, and
transmit the identified metadata,
wherein the metadata comprises:
information about an identifier (ID) of a viewpoint group including at least one viewpoint of the plurality of viewpoints, wherein the at least one viewpoint in the viewpoint group shares a common reference coordinate system, and
information indicating yaw, pitch, and roll rotation angles, respectively, of X, Y, and Z axes of a global coordinate system of a viewpoint of the plurality of viewpoints, relative to the common reference coordinate system.
12. The apparatus of claim 11 , wherein the metadata further comprises information indicating position of the viewpoint of the plurality of viewpoints in the common reference coordinate system.
13. The apparatus of claim 11 ,
wherein the metadata further comprises information indicating a viewpoint switching mode for a viewpoint to be switched, when switching occurs between viewpoints in the viewpoint group, and
wherein the information indicating the viewpoint switching mode indicates one of a forward line of sight (LoS) mode, a backward LoS mode, a central estimation-based non-LoS mode, or an alignment group initial orientation switching mode.
14. An apparatus for processing information about omnidirectional content including a plurality of viewpoints, the apparatus comprising:
a transceiver; and
a controller coupled to the transceiver,
wherein the controller is configured to:
receive the for the omnidirectional content including the plurality of viewpoint, and
process media data for the omnidirectional content based on the received metadata,
wherein the metadata comprises:
information about an identifier (ID) of a viewpoint group including at least one viewpoint of the plurality of viewpoints, wherein the at least one viewpoint in the viewpoint group shares a common reference coordinate system, and
information indicating yaw, pitch, and roll rotation angles, respectively, of X, Y, and Z axes of a global coordinate system of a viewpoint of the plurality of viewpoints, relative to the common reference coordinate system.
15. The apparatus of claim 14 , wherein the metadata further comprises information indicating position of the viewpoint of the plurality of viewpoints in the common reference coordinate system.
16. The apparatus of claim 14 ,
wherein the metadata further comprises information indicating a viewpoint switching mode for a viewpoint to be switched, when switching occurs between viewpoints in the viewpoint group, and
wherein the information indicating the viewpoint switching mode indicates one of a forward line of sight (LoS) mode, a backward LoS mode, a central estimation-based non-LoS mode, or an alignment group initial orientation switching mode.