Information processing apparatus and information processing method
3D data representing a three-dimensional structure is divided into a plurality of pieces and encoded, an obtained plurality of divided bitstreams is multiplexed, and one bitstream including a separator indicating a position of a joint between the divided bitstreams is generated. Furthermore, a separator indicating a position of a joint between divided bitstreams obtained by dividing 3D data representing a three-dimensional structure into a plurality of pieces and encoding the plurality of divided pieces of the 3D data, which is included in a bitstream obtained by multiplexing a plurality of the divided bitstreams, is analyzed, and the bitstream is divided into every divided bitstream on the basis of information included in the analyzed separator, and decoded. Applications of the technology include being implemented in, for example, an information processing apparatus, an image processing apparatus, electronic equipment, an information processing method, a program, or the like.
1. An information processing apparatus comprising:
circuitry configured to
divide octree data representing a three-dimensional structure into a first hierarchy and a second hierarchy to encode the first hierarchy and the second hierarchy into a first divided bitstream and a second divided bitstream, respectively, wherein a first resolution of the first hierarchy is different from a second resolution of the second hierarchy, the first hierarchy corresponds to a first level of the octree, and the second hierarchy corresponds to a second level of the octree, and
generate one bitstream comprising the first divided bitstream, a separator, and the second divided bitstream,
wherein the separator is between the first divided bitstream and the second divided bitstream, and the separator has a unique bit pattern for detecting the separator.
2. The information processing apparatus according to claim 1 , wherein the circuitry is further configured to
arrange the separator at a joint between the first divided bitstream and the second divided bitstream.
3. The information processing apparatus according to claim 2 , wherein the circuitry is further configured to
generate the separator, and arrange the separator at the joint between the first divided bitstream and the second divided bitstream.
4. The information processing apparatus according to claim 1 , wherein the separator further comprises position information indicating a position of a part of the three-dimensional structure of the octree data corresponding to the divided bitstream.
5. The information processing apparatus according to claim 1 , wherein the circuitry is further configured to
generate the first divided bitstream and the second divided bitstream by converting the octree data into 2D data representing a two-dimensional structure, and dividing and encoding the 2D data on a basis of the two-dimensional structure.
6. The information processing apparatus according to claim 1 , wherein the circuitry is further configured to
generate the first divided bitstream and the second divided bitstream by dividing the octree data on a basis of the three-dimensional structure to convert each of the obtained plurality of pieces of divided octree data into divided 2D data representing a two-dimensional structure, and encoding each of the obtained plurality of pieces of the divided 2D data.
7. The information processing apparatus according to claim 1 , wherein the circuitry is further configured to
divide the octree data into geometry data indicating a position of each point of a point cloud and attribute data indicating attribute information on each point of the point cloud to encode the divided data, and generate the first divided bitstream and the second divided bitstream.
8. The information processing apparatus according to claim 1 , wherein the circuitry is further configured to:
generate a third divided bitstream by encoding first attribute data of the first hierarchy, and generate a fourth divided bitstream by encoding second attribute data of the second hierarchy;
include the third divided bitstream, a second separator, and the fourth divided bitstream in the one bitstream,
wherein the second separator is between the third divided bitstream and the fourth divided bitstream.
9. An information processing method comprising:
dividing octree data representing a three-dimensional structure into a first hierarchy and a second hierarchy to encode the first hierarchy and the second hierarchy into a first divided bitstream and a second divided bitstream, respectively, wherein a first resolution of the first hierarchy is different from a second resolution of the second hierarchy, the first hierarchy corresponds to a first level of the octree, and the second hierarchy corresponds to a second level of the octree, and
generating one bitstream comprising the first divided bitstream, a separator, and the second divided bitstream,
wherein the separator is between the first divided bitstream and the second divided bitstream, and the separator has a unique bit pattern for detecting the separator.
10. An information processing apparatus comprising:
circuitry configured to
analyze a separator indicating a position of a joint between a first divided bitstream and a second divided bitstream obtained by dividing octree data representing a three-dimensional structure into a first hierarchy and a second hierarchy and encoding the first hierarchy and the second hierarchy into the first divided bitstream and the second divided bitstream, the separator being included in a bitstream comprising the first divided bitstream, the separator, and the second divided bitstream; and
divide the bitstream into the first divided bitstream and the second divided bitstream on a basis of information included in the separator analyzed by the analysis unit, to decode each of the plurality of divided bitstreams,
wherein a first resolution of the first hierarchy is different from a second resolution of the second hierarchy, the first hierarchy corresponds to a first level of the octree, and the second hierarchy corresponds to a second level of the octree, and
wherein the separator is between the first divided bitstream and the second divided bitstream, and the separator has a unique bit pattern for detecting the separator.
11. The information processing apparatus according to claim 10 , wherein the circuitry is further configured to
detect the separator by detecting the bit pattern, and
divide the bitstream at a detected position of the separator.
12. The information processing apparatus according to claim 11 , wherein
the separator further includes information regarding a particular divided bitstream of t the first divided bitstream and the second divided bitstream corresponding to the separator, and
the circuitry is configured to analyze the separator to obtain the information regarding the particular divided bitstream.
13. The information processing apparatus according to claim 12 , wherein the circuitry is further configured to
synthesize a plurality of pieces of divided data obtained by decoding each of the first divided bitstream and the second divided bitstream, on a basis of the information regarding the particular divided bitstream obtained by analyzing the separator.
14. The information processing apparatus according to claim 13 , wherein
the information regarding the particular divided bitstream includes position information indicating a position of a part of the three-dimensional structure of the octree data corresponding to the particular divided bitstream, and
the circuitry is further configured to synthesize the plurality of pieces of divided data on a basis of the position information obtained by analyzing the separator.
15. The information processing apparatus according to claim 14 , wherein
the position information includes information indicating a position of a part of the three-dimensional structure of the octree data corresponding to the particular divided bitstream in a two-dimensional structure, and
the circuitry is further configured to synthesize a plurality of pieces of divided 2D data representing a two-dimensional structure obtained by decoding each of the first divided bitstream and the second divided bitstream, on a basis of position information obtained by analyzing the separator.
16. The information processing apparatus according to claim 14 , wherein
the position information includes information indicating a position of a part of the three-dimensional structure of the 3D data corresponding to the particular divided bitstream in the three-dimensional structure, and
the circuitry is further configured to synthesize a plurality of divided octree data obtained by decoding each of the first divided bitstream and the second divided bitstream, on a basis of the position information obtained by analyzing the separator.
17. The information processing apparatus according to claim 13 , wherein
the information regarding the particular divided bitstream includes information regarding an attribute of the particular divided bitstream, and
the circuitry is further configured to synthesize geometry data indicating a position of each point of a point cloud, attribute data indicating attribute information on each point of the point cloud, obtained by decoding each of the first divided bitstream and the second divided bitstream, on a basis of the information regarding the attribute obtained by analyzing the separator.
18. The information processing apparatus according to claim 13 , wherein
the information regarding the particular divided bitstream includes information regarding a resolution corresponding to the particular divided bitstream, and
the circuitry is further configured to synthesize a plurality of pieces of divided data obtained by decoding each of the first divided bitstream and the second divided bitstream, on a basis of the information regarding the resolution obtained by analyzing the separator.
19. An information processing method comprising:
analyzing a separator indicating a position of a joint between a first divided bitstream and a second divided bitstream obtained by dividing octree data representing a three-dimensional structure into a first hierarchy and a second hierarchy and encoding the first hierarchy and the second hierarchy into the first divided bitstream and the second divided bitstream, the separator being included in a bitstream comprising the first divided bitstream, the separator, and the second divided bitstream; and
dividing the bitstream into the first divided bitstream and the second divided bitstream on a basis of information included in the analyzed separator to decode each of the plurality of divided bitstreams,
wherein a first resolution of the first hierarchy is different from a second resolution of the second hierarchy, the first hierarchy corresponds to a first level of the octree, and the second hierarchy corresponds to a second level of the octree, and
wherein the separator is between the first divided bitstream and the second divided bitstream, and the separator has a unique bit pattern for detecting the separator.