Granted Patent B2

US 12,212,759 · App. 17/985,664 · Granted Jan 28, 2025

Inventor: Ying Hu (Shenzhen, CN)

Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED

H04N19/154H04N19/172H04N19/463H04N19/70

Abstract

Claims (57)

1. A point cloud decoding method, comprising:

receiving a point cloud file transmitted by a data source, the point cloud file including at least one point cloud media track and encapsulating an alternative group corresponding to different point cloud media tracks, wherein point cloud media tracks having a same point cloud content and having different point cloud qualities are arranged in the same alternative group; when using a single-track mode for encapsulation of the point cloud file, tracks of point cloud content with different qualities belong to the same alternative group; when using a multi-track mode for encapsulation, geometry component tracks of the point cloud content with different qualities belong to the same alternative group, and attribute component tracks of the point cloud content are associated with the geometry component tracks;

parsing file encapsulation information of the at least one point cloud media track, to obtain quality indication information carried in the file encapsulation information, the quality indication information being used for representing point cloud quality of the at least one point cloud media track; and

selecting and decoding a point cloud media track with designated point cloud quality from the point cloud file according to the quality indication information carried in the file encapsulation information.

2. The point cloud decoding method according to claim 1 , wherein receiving the point cloud file comprises:

receiving streaming media signaling that is transmitted by the data source and that is used for transmitting point cloud data;

parsing the streaming media signaling, to obtain at least two pieces of selectable quality indication information carried in the streaming media signaling;

transmitting a data transmission request to the data source according to quality indication information selected from the at least two pieces of quality indication information; and

receiving the point cloud file that is transmitted by the data source and that corresponds to the data transmission request.

3. The point cloud decoding method according to claim 2 , wherein transmitting the data transmission request to the data source comprises

determining a network bandwidth of performing data transmission with the data source;

performing matching detection on the network bandwidth and the at least two pieces of quality indication information carried in the streaming media signaling, to select target point cloud quality matching the network bandwidth; and

transmitting the data transmission request generated according to the target point cloud quality to the data source.

4. The point cloud decoding method according to claim 1 , wherein parsing the file encapsulation information comprises:

parsing the file encapsulation information of the at least one point cloud media track, to determine at least one quality indication field related to a quality parameter of the point cloud media track; and

determining the quality indication information of the point cloud file according to a value of the at least one quality indication field.

5. The point cloud decoding method according to claim 4 , wherein

the quality indication field represents a frame rate of a point cloud bitstream, and a value of the quality indication field is an unsigned integer whose length is 8 bytes.

6. The point cloud decoding method according to claim 4 , wherein the quality indication information includes at least one of a true quality value, an equivalent quality value, and a quality scale, wherein the true quality value is a parameter value of the quality parameter, the equivalent quality value is the number of unit quality parameters that is obtained by comparing the parameter value of the quality parameter with a preset unit quality parameter, and the quality scale is scale information used for representing a parameter value range of the quality parameter.

7. The point cloud decoding method according to claim 4 , wherein the quality indication field represents a bitrate of a point cloud bitstream, and a value of the quality indication field is an unsigned integer whose length is 32 bytes.

8. A point cloud decoding apparatus, comprising: a memory storing computer program instructions; and a processor coupled to the memory and configured to execute the computer program instructions and perform:

receiving a point cloud file transmitted by a data source, the point cloud file including at least one point cloud media track and encapsulating an alternative group corresponding to different point cloud media tracks, wherein point cloud media tracks having a same point cloud content and having different point cloud qualities are arranged in the same alternative group; when using a single-track mode for encapsulation of the point cloud file, tracks of point cloud content with different qualities belong to the same alternative group; when using a multi-track mode for encapsulation, geometry component tracks of the point cloud content with different qualities belong to the same alternative group, and attribute component tracks of the point cloud content are associated with the geometry component tracks;

parsing file encapsulation information of the at least one point cloud media track, to obtain quality indication information carried in the file encapsulation information, the quality indication information being used for representing point cloud quality of the at least one point cloud media track; and

selecting and decoding a point cloud media track with designated point cloud quality from the point cloud file according to the quality indication information carried in the file encapsulation information.

9. The point cloud decoding apparatus according to claim 8 , wherein receiving the point cloud file includes:

receiving streaming media signaling that is transmitted by the data source and that is used for transmitting point cloud data;

parsing the streaming media signaling, to obtain at least two pieces of selectable quality indication information carried in the streaming media signaling;

transmitting a data transmission request to the data source according to quality indication information selected from the at least two pieces of quality indication information; and

receiving the point cloud file that is transmitted by the data source and that corresponds to the data transmission request.

10. The point cloud decoding apparatus according to claim 9 , wherein transmitting the data transmission request to the data source includes:

determining a network bandwidth of performing data transmission with the data source;

performing matching detection on the network bandwidth and the at least two pieces of quality indication information carried in the streaming media signaling, to select target point cloud quality matching the network bandwidth; and

transmitting the data transmission request generated according to the target point cloud quality to the data source.

11. The point cloud decoding apparatus according to claim 8 , wherein parsing the file encapsulation information includes:

parsing the file encapsulation information of the at least one point cloud media track, to determine at least one quality indication field related to a quality parameter of the point cloud media track; and

determining the quality indication information of the point cloud file according to a value of the at least one quality indication field.

12. The point cloud decoding apparatus according to claim 11 , wherein the quality indication field represents a frame rate of a point cloud bitstream, and a value of the quality indication field is an unsigned integer whose length is 8 bytes.

13. The point cloud decoding apparatus according to claim 11 , wherein the quality indication information includes at least one of a true quality value, an equivalent quality value, and a quality scale, wherein the true quality value is a parameter value of the quality parameter, the equivalent quality value is the number of unit quality parameters that is obtained by comparing the parameter value of the quality parameter with a preset unit quality parameter, and the quality scale is scale information used for representing a parameter value range of the quality parameter.

14. The point cloud decoding apparatus according to claim 11 , wherein the quality indication field represents a bitrate of a point cloud bitstream, and a value of the quality indication field is an unsigned integer whose length is 32 bytes.

15. A non-transitory computer-readable storage medium storing computer program instructions executable by at least one processor to perform:

receiving a point cloud file transmitted by a data source, the point cloud file including at least one point cloud media track and encapsulating an alternative group corresponding to different point cloud media tracks, wherein point cloud media tracks having a same point cloud content and having different point cloud qualities are arranged in the same alternative group; when using a single-track mode for encapsulation of the point cloud file, tracks of point cloud content with different qualities belong to the same alternative group; when using a multi-track mode for encapsulation, geometry component tracks of the point cloud content with different qualities belong to the same alternative group, and attribute component tracks of the point cloud content are associated with the geometry component tracks;

parsing file encapsulation information of the at least one point cloud media track, to obtain quality indication information carried in the file encapsulation information, the quality indication information being used for representing point cloud quality of the at least one point cloud media track; and

selecting and decoding a point cloud media track with designated point cloud quality from the point cloud file according to the quality indication information carried in the file encapsulation information.

16. The non-transitory computer-readable storage medium according to claim 15 , wherein receiving the point cloud file includes:

receiving streaming media signaling that is transmitted by the data source and that is used for transmitting point cloud data;

parsing the streaming media signaling, to obtain at least two pieces of selectable quality indication information carried in the streaming media signaling;

transmitting a data transmission request to the data source according to quality indication information selected from the at least two pieces of quality indication information; and

receiving the point cloud file that is transmitted by the data source and that corresponds to the data transmission request.

17. The non-transitory computer-readable storage medium according to claim 16 , wherein transmitting the data transmission request to the data source includes:

determining a network bandwidth of performing data transmission with the data source;

performing matching detection on the network bandwidth and the at least two pieces of quality indication information carried in the streaming media signaling, to select target point cloud quality matching the network bandwidth; and

transmitting the data transmission request generated according to the target point cloud quality to the data source.

18. The non-transitory computer-readable storage medium according to claim 15 , wherein parsing the file encapsulation information includes:

parsing the file encapsulation information of the at least one point cloud media track, to determine at least one quality indication field related to a quality parameter of the point cloud media track; and

determining the quality indication information of the point cloud file according to a value of the at least one quality indication field.

19. The non-transitory computer-readable storage medium according to claim 18 , wherein the quality indication field represents a frame rate of a point cloud bitstream, and a value of the quality indication field is an unsigned integer whose length is 8 bytes.

20. The non-transitory computer-readable storage medium according to claim 18 , wherein the quality indication information includes at least one of a true quality value, an equivalent quality value, and a quality scale, wherein the true quality value is a parameter value of the quality parameter, the equivalent quality value is the number of unit quality parameters that is obtained by comparing the parameter value of the quality parameter with a preset unit quality parameter, and the quality scale is scale information used for representing a parameter value range of the quality parameter.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (38)