Point cloud data encapsulation method and point cloud data transmission method

Patent metadata

Field	Value
Publication number	US-12056091-B2
Application number	US-202117791599-A
Country	US
Kind code	B2
Filing date	Jan 8, 2021
Priority date	Jan 10, 2020
Publication date	Aug 6, 2024
Grant date	Aug 6, 2024

Abstract

Provided are a point cloud data encapsulation method and a point cloud data transmission method. The point cloud data encapsulation method includes: compressing a point cloud media file; and encapsulating the compressed point cloud media file and setting a classification record according to a data type, where the classification record is used for indicating a data type of each portion of point cloud data in the point cloud media file. The problem of low transmission efficiency of the media content and waste of storage space in the point cloud data transmission is solved, the flexibility of the media content combination is increased, management control of a multimedia service is increased, users are given more rights to independently select and acquire the media content, diversified application scenarios are provided, and better multimedia content provision and transmission solutions are provided for network operators.

First claim

What is claimed is:

1. A point cloud media resource encapsulation method, comprising:
compressing a point cloud media file;
encapsulating the compressed point cloud media file as a group of media assets and segmenting the group of media assets to obtain a plurality of media assets; and
associating the plurality of media assets with a plurality of data type in the point cloud media file based on a classification list;
wherein the classification list is used for indicating correspondences between the plurality of media assets and the plurality of data type; the compressed point cloud media file comprises a plurality of point cloud contents, different point cloud contents correspond to different combinations of media asserts;
wherein the method further comprises: setting a pending flag for each point cloud content, wherein the pending flag is used for indicating whether all media assets in each point cloud content are ready for rendering.

2. The method according to claim 1 , wherein
each of the plurality of media assets has a respective media asset number; the classification list comprises a plurality of media asset lists and an asset number list;
the plurality of media asset lists correspond to a plurality of data types of the group of media assets;
the asset number list is a set of all media asset numbers of the plurality of media assets.

3. The method according to claim 1 , wherein,
the plurality of data types comprises at least one of occupation map information, geometric information, attribute information, and auxiliary information;
each data type corresponds to at least one media assets of the plurality of media assets; and
the classification list comprises correspondences between the plurality of data types and the plurality of media assets.

4. The method according to claim 2 , wherein,
each media asset list corresponds to at least one media asset number, and a quantity of the at least one media asset numbers corresponding to each media asset list is consistent with a number of media versions, wherein each media version is one application scenario.

5. The method according to claim 1 , further comprising:
setting a value of a pending flag of one point cloud content as 1 in a case where all media assets in the one point cloud content are ready for rendering; or
setting a value of a pending flag of one point cloud content as 0 in a case where all media assets in the one point cloud content are not ready for rendering.

6. A point cloud data transmission method, comprising:
adding a related content of a classification list to signaling information, wherein the classification list is used for indicating correspondences between a plurality of data types in a compressed point cloud media file and a plurality of media assets in the compressed point cloud media file, wherein the compressed point media file comprises a plurality of point cloud contents; and
transmitting local data that needs to be updated of a first point cloud content in the compressed point cloud media file according to the classification list;
wherein before transmitting the local data that needs to be updated of the first cloud content in the compressed point cloud media file, the method further comprises: transmitting all data of a second point cloud content in the compressed point cloud media file, wherein the local data that needs to be updated of the first point cloud content is different from the all data of the second point cloud content.

7. The method according to claim 6 , wherein,
different point cloud contents correspond to different combinations of media assets; and
the method further comprises:
setting a pending flag for each of the plurality of point cloud contents in the encapsulated point cloud media file, wherein the pending flag is used for indicating whether all media assets in each of the plurality of point cloud contents are ready for rendering.

8. The method according to claim 6 , further comprising:
compressing a point cloud media file to obtain the compressed point cloud media file,
encapsulating the compressed point cloud media file and setting the classification list according to the plurality of data types.

9. The method according to claim 8 , wherein encapsulating the compressed point cloud media file and setting the classification record according to the plurality of data types comprises:
encapsulating the compressed point cloud media file as a group of media assets, segmenting the group of media assets to obtain the plurality of media assets; and
associating the plurality of media assets with the plurality of data types in the compressed point cloud media file based on the classification list.

10. The method according to claim 9 , wherein
the plurality of media assets have different media asset numbers; the classification list comprises a plurality of media asset lists and an asset number list;
the plurality of media asset lists correspond to a plurality of data types of the group of media assets;
the asset number list is a set of all media asset numbers of the plurality of media assets.

11. The method according to claim 10 , wherein
each media asset list corresponds to at least one media asset number, and a quantity of the at least one media asset numbers corresponding to each media asset list is consistent with a number of media versions, wherein each media version is one application scenario.

12. The method according to claim 7 , further comprising:
setting a value of a pending flag of one point cloud content as 1 in a case where all media assets in the one point cloud content are ready for rendering; or
setting a value of a pending flag of one point cloud content as 0 in a case where a transmission of all media assets in the one point cloud content are not ready for rendering.

Assignees

• Univ Shanghai Jiaotong

Inventors

• Xu Yiling

Classifications

• H04L65/61

  for supporting one-way streaming services, e.g. Internet radio · CPC title

• G06F16/1744 Primary

  using compression, e.g. sparse files · CPC title

• H04L65/70 Primary

  Media network packetisation · CPC title

• G06F16/182

  Distributed file systems · CPC title

• H04L69/04

  Protocols for data compression, e.g. ROHC · CPC title