Device and method for processing data in multimedia system
Various embodiments of the present disclosure relate to a device and a method for processing point cloud data on the basis of PCC technology in a multimedia system. To this end, a bit stream according to point cloud compression may be generated, and the bit stream may be divided to generate access units by a plurality of type-specific data elements. The plurality of data elements may include at least one layer-specific shape data, at least one layer-specific texture data, auxiliary patch information, and occupancy information. The size of each of the plurality of access units may match a maximum transmission unit in a network.
1. A method for processing point cloud data in an electronic device, the method comprising:
generating a bitstream according to point cloud compression (PCC);
dividing the bitstream into a plurality of type-specific data components; and
generating a plurality of access units (AUs) based on the plurality of type-specific data components by encapsulating the plurality of type-specific data components into a network abstraction layer, NAL, unit, included in a payload of the AU,
wherein the plurality of type-specific data components comprise at least one layer-specific geometry data, at least one layer-specific texture data, auxiliary patch information, and occupancy (map) information,
wherein the each of the plurality of AUs comprises a header and a payload, and
wherein a size of each of the plurality of AUs matches a maximum transmission unit (MTU) in a network.
2. The method of claim 1 , wherein the header comprises information about a type of a data component included in the payload of the AU and an identifier of a PCC frame to which the AU is applicable.
3. The method of claim 2 , wherein the header further comprises information about a coding type applied to the data component included in the payload of the AU and one or a plurality of tool parameters.
4. The method of claim 1 , further comprising interleaving the plurality of AUs.
5. The method of claim 1 , wherein the data component included in the payload of the each of the plurality of AUs is identified by explicit signaling.
6. The method of claim 1 , wherein a coding type applied to the at least one layer-specific geometry data and the at least one layer-specific texture data is a video coding scheme, and a coding type applied to the auxiliary patch information is an arithmetic coding scheme.
7. The method of claim 1 , further comprising generating an AU based on meta data regarding the plurality of type-specific data components.
8. An electronic device for processing point cloud data, the electronic device comprising:
a transceiver; and
at least one processor connected to the transceiver,
wherein the at least one processor is configured to:
generate a bitstream according to point cloud compression (PCC), and
dividing the bitstream into a plurality of type-specific data components, and
generate a plurality of access units (AUs) based on the plurality of type-specific data components by encapsulating the plurality of type-specific data components into a network abstraction layer, NAL, unit, included in a payload of the AU,
wherein the plurality of type-specific data components comprise at least one layer-specific geometry data, at least one layer-specific texture data, auxiliary patch information, and occupancy (map) information,
wherein the each of the plurality of AUs comprises a header and a payload, and
wherein a size of each of the plurality of AUs matches a maximum transmission unit (MTU) in a network.
9. The electronic device of claim 8 , wherein the header comprises information about a type of a data component included in the payload of the AU and an identifier of a PCC frame to which the AU is applicable.
10. The electronic device of claim 9 , wherein the header further comprises information about a coding type applied to the data component included in the payload of the AU and one or a plurality of tool parameters.
11. The electronic device of claim 8 , further comprising an interleaver configured to interleave the plurality of AUs.
12. The electronic device of claim 8 , wherein the data component included in the payload of the each of the plurality of AUs is identified by explicit signaling.
13. The electronic device of claim 8 , further comprising:
a first coder configured to code the at least one layer-specific geometry data and the at least one layer-specific texture data using a video coding scheme; and
a second coder configured to code the auxiliary patch information using an arithmetic coding scheme.
14. The electronic device of claim 8 , wherein the at least one processor is configured to generate an AU based on meta data regarding the plurality of type-specific data components.