CONNECTIVITY INFORMATION CODING METHOD AND APPARATUS FOR CODED MESH REPRESENTATION
Systems and methods of the present disclosure provide solutions that address technological challenges related to 3D content. These solutions include a computer-implemented method for encoding three-dimensional (3D) content comprising: processing the 3D content into segments, each segment comprising a set of faces and vertex indices representative of the 3D content; processing each segment to sort the respective set of faces and vertex indices in each segment; packing each segment of 3D content to generate connectivity information frames of blocks, each block comprising a subset of the sorted faces and vertex indices; and encoding the connectivity information frames.
1 . A computer-implemented method for encoding three-dimensional (3D) content comprising:
processing the 3D content into segments, each segment comprising a set of faces and vertex indices representative of the 3D content;
processing each segment to sort the respective set of faces and vertex indices in each segment;
packing each segment of 3D content to generate connectivity information frames of blocks, each block comprising a subset of the sorted faces and vertex indices; and
encoding the connectivity information frames.
2 . The computer-implemented method of claim 1 , wherein each face in the set of faces is associated with three sorted vertices indicated by the sorted vertex indices.
3 . The computer-implemented method of claim 1 , wherein each block is mapped to a particular slice of a connectivity information frame.
4 . The computer-implemented method of claim 1 , wherein the faces are sorted in a descending order and, for each face, the vertex indices are sorted in an ascending order.
5 . The computer-implemented method of claim 1 , wherein each block includes connectivity coding samples that are encoded as pixels.
6 . The computer-implemented method of claim 1 , wherein each block comprises connectivity coding samples that indicate differential values of the sorted vertex indices, wherein the faces are encoded based on the differential values.
7 . The computer-implemented method of claim 1 , wherein the connectivity information frames are associated with one or more resolutions based on a number of faces in each connectivity information frame.
8 . The computer-implemented method of claim 1 , wherein the encoding the connectivity information frames is based on a video codec, the video codec indicated in a sequence parameter set, a picture parameter set, or a supplemental enhancement information associated with the encoded connectivity information frames.
9 . An encoder for encoding three-dimensional (3D) content comprising:
at least one processor; and
a memory storing instructions that, when executed by the at least one processor, cause the encoder to perform:
processing the 3D content into segments, each segment comprising a set of faces and vertex indices representative of the 3D content;
processing each segment to sort the respective set of faces and vertex indices in each segment;
packing each segment of 3D content to generate connectivity information frames of blocks, each block comprising a subset of the sorted faces and vertex indices;
determining differential values of the sorted vertex indices and a constant value based on a video coded bit depth for encoding the connectivity information frames, wherein the differential values are encoded as connectivity coding samples in the blocks; and
encoding the connectivity information frames.
10 . The encoder of claim 9 , wherein each face in the set of faces is associated with three sorted vertices indicated by the sorted vertex indices.
11 . The encoder of claim 9 , wherein each block is mapped to a particular slice of a connectivity information frame.
12 . The encoder of claim 9 , wherein the faces are sorted in a descending order and, for each face, the vertex indices are sorted in an ascending order.
13 . The encoder of claim 9 , wherein each block includes connectivity coding samples that are encoded as pixels.
14 . The encoder of claim 9 , wherein the connectivity information frames are associated with one or more resolutions based on a number of faces in each connectivity information frame.
15 . A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor of an encoder, cause the encoder to perform:
processing 3D content into segments, each segment comprising a set of faces and vertex indices representative of the 3D content;
processing each segment to sort the respective set of faces and vertex indices in each segment to generate respective face lists;
packing the respective face lists of each segment of 3D content to generate two-dimensional arrays of connectivity information that are encoded as connectivity information frames of blocks, each block comprising a subset of the sorted faces and vertex indices; and
encoding the connectivity information frames.
16 . The non-transitory computer-readable storage medium of claim 15 , wherein each face in the set of faces is associated with three sorted vertices indicated by the sorted vertex indices.
17 . The non-transitory computer-readable storage medium of claim 15 , wherein each block is mapped to a particular slice of a connectivity information frame.
18 . The non-transitory computer-readable storage medium of claim 15 , wherein the faces are sorted in a descending order and, for each face, the vertex indices are sorted in an ascending order.
19 . The non-transitory computer-readable storage medium of claim 15 , wherein each block includes connectivity coding samples that are encoded as pixels.
20 . The non-transitory computer-readable storage medium of claim 15 , wherein the encoding the connectivity information frames is based on a video codec, the video codec indicated in a sequence parameter set, a picture parameter set, or a supplemental enhancement information associated with the encoded connectivity information frames.