公开(公告)号：US20220030211A1

公开(公告)日：2022-01-27

申请号：US17496035

申请日：2021-10-07

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: H04N13/161 ,  H04N19/597 ,  H04N19/85 ,  H04N19/176 ,  G06T9/00

Abstract: A method of interframe point cloud attribute decoding of video data is performed by at least one processor and includes: obtaining a first reconstructed residual; obtaining a quantization index of a second reconstructed residual; obtaining the second reconstructed residual, based on the obtained quantization index of the second reconstructed residual and the obtained first reconstructed residual; and obtaining a color attribute of a point of a point cloud by decoding the obtained second reconstructed residual or decoding a transform residual based on the obtained second reconstructed residual. The first reconstructed residual and the second reconstructed residual are each a reconstructed residual of a respective channel of the color attribute.

公开(公告)号：US20210392335A1

公开(公告)日：2021-12-16

申请号：US17458809

申请日：2021-08-27

Applicant: TENCENT AMERICA LLC

Inventor： Birendra KATHARIYA ,  Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: H04N19/132 ,  H04N19/103 ,  G06T9/40 ,  H04N19/124

Abstract: A method of adaptive point cloud attribute coding is performed by at least one processor and includes determining a centroid of k candidate points of a point cloud, k being a predetermined sampling rate of all points of the point cloud, and selecting one of the k candidate points that is closest to the centroid. The method further includes determining a first levels-of-detail (LoD) layer comprising the one of the k candidate points, and a second LoD layer without the one of the k candidate points, and performing coding of attributes of the all points, based on the first LoD layer and the second LoD layer.

公开(公告)号：US20200302654A1

公开(公告)日：2020-09-24

申请号：US16822198

申请日：2020-03-18

Applicant: TENCENT AMERICA LLC

Inventor： Shuai ZHAO ,  Iraj SODAGAR ,  Shan LIU ,  Byeongdoo CHOI ,  Sehoon YEA ,  Arash VOSOUGHI

IPC: G06T9/40 ,  H04N19/96 ,  G06T17/00 ,  H04N19/184

Abstract: A method of obtaining a tree-based point cloud compression (PCC) media stream using moving picture experts group (MPEG)-dynamic adaptive streaming over http (DASH), is performed by at least one processor and includes obtaining, from a server, a media representation description (MPD) comprising a PCC uniform resource indicator (URI) and a PCC three-dimensional (3D) descriptor, and determining whether the PCC URI comprised in the obtained MPD indicates that the tree-based PCC media stream is to be accessed. The method further includes, based on the PCC URI being determined to indicate that the tree-based PCC media stream is to be accessed, obtaining, from the server, the tree-based PCC media stream, using the PCC 3D descriptor comprised in the obtained MPD.

公开(公告)号：US20220335658A1

公开(公告)日：2022-10-20

申请号：US17857835

申请日：2022-07-05

Applicant: TENCENT AMERICA LLC

Inventor： Shuai ZHAO ,  Iraj SODAGAR ,  Shan LIU ,  Byeongdoo CHOI ,  Sehoon YEA ,  Arash VOSOUGHI

IPC: G06T9/40 ,  H04N19/184 ,  G06T17/00 ,  H04N19/96

Abstract: A method of obtaining a tree-based point cloud compression (PCC) media stream using moving picture experts group (MPEG)-dynamic adaptive streaming over http (DASH), is performed by at least one processor and includes obtaining, from a server, a media representation description (MPD) comprising a PCC uniform resource indicator (URI) and a PCC three-dimensional (3D) descriptor, and determining whether the PCC URI comprised in the obtained MPD indicates that the tree-based PCC media stream is to be accessed. The method further includes, based on the PCC URI being determined to indicate that the tree-based PCC media stream is to be accessed, obtaining, from the server, the tree-based PCC media stream, using the PCC 3D descriptor comprised in the obtained MPD.

公开(公告)号：US20210358091A1

公开(公告)日：2021-11-18

申请号：US17444030

申请日：2021-07-29

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: G06T5/00 ,  H04N19/59 ,  G06T5/30 ,  H04N19/182

Abstract: A method of video decoding performed in a video decoder includes receiving compressed geometric data corresponding to a three dimensional (3D) space. The method further includes generating a resolution occupancy map. The method further includes reconstructing a point cloud using the compressed geometric data and the resolution occupancy map. The method further includes performing a smoothing operation on one of the (i) reconstructed point cloud and (ii) the generated resolution occupancy map.

公开(公告)号：US20210067805A1

公开(公告)日：2021-03-04

申请号：US17004616

申请日：2020-08-27

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon Yea ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/597 ,  H04N19/119 ,  H04N19/13 ,  H04N19/46 ,  H04N19/147 ,  H04N19/96 ,  H04N19/184 ,  H04N19/169

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform obtaining a leaf node of geometry based point cloud compression (G-PCC) data, splitting the leaf node into a plurality of cuboids, deriving separate triangle soups for each of the cuboids, and coding a plurality of flags respectively for each of the edges of each of the cuboids, where the plurality of flags indicate whether vertices of the separate triangle soups are present on ones of the edges.

公开(公告)号：US20210012535A1

公开(公告)日：2021-01-14

申请号：US16924790

申请日：2020-07-09

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: G06T9/00 ,  H04N19/61 ,  H04N19/85

Abstract: A method of interframe point cloud attribute coding is performed by at least one processor and includes coding a first color attribute of a point of a point cloud to obtain a first reconstructed residual, coding a second color attribute of the point to obtain a second reconstructed residual, and determining a quantization index of the second reconstructed residual, based on the first reconstructed residual and the second reconstructed residual. The method further includes updating the second reconstructed residual, based on the quantization index and the first reconstructed residual.

公开(公告)号：US20210006765A1

公开(公告)日：2021-01-07

申请号：US16917107

申请日：2020-06-30

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: H04N13/161 ,  H04N19/597 ,  G06T9/00 ,  H04N19/85 ,  H04N19/176

Abstract: A method of interframe point cloud attribute decoding of video data is performed by at least one processor and includes: obtaining a first reconstructed residual; obtaining a quantization index of a second reconstructed residual; obtaining the second reconstructed residual, based on the obtained quantization index of the second reconstructed residual and the obtained first reconstructed residual; and obtaining a color attribute of a point of a point cloud by decoding the obtained second reconstructed residual or decoding a transform residual based on the obtained second reconstructed residual.

公开(公告)号：US20200296394A1

公开(公告)日：2020-09-17

申请号：US16814350

申请日：2020-03-10

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/30 ,  H04N19/172

Abstract: Systems and methods for decoding a video stream, a method includes receiving video stream, the video stream including: a frame of a plurality of two-dimensional (2D) pictures that are layers of the frame, each of the plurality of 2D pictures having a respective attribute of a same three-dimensional (3D) representation, frame partition information that indicates the frame is partitioned into a plurality of sub-frames, each of the plurality of sub-frames being a respective combination of a sub-region of each picture of the plurality of 2D pictures, and 3D bounding box information that specifies a 3D position corresponding to a sub-frame of the plurality of sub-frames; the method further includes identifying the sub-frame using the frame partition information; and decoding the sub-frame identified.

公开(公告)号：US20210006840A1

公开(公告)日：2021-01-07

申请号：US16915385

申请日：2020-06-29

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/96 ,  H04N19/70 ,  G06T9/40 ,  H04N19/176

Abstract: A method and apparatus for encoding/decoding a video stream using video point cloud coding, the encoding/decoding including obtaining an input point cloud, generating patches based on points of the point cloud, packing the patches into an image, generating the video stream based on the image, and smoothing the image using Morton codes.