公开(公告)号：WO2022114786A1

公开(公告)日：2022-06-02

申请号：PCT/KR2021/017427

申请日：2021-11-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： JOSHI, Rajan Laxman ,  FARAMARZI, Esmaeil ,  BUDAGAVI, Madhukar

IPC: H04N19/597 ,  H04N19/184 ,  G06T9/00 ,  G06T17/20

Abstract: An encoding device, a decoding device, and a method for mesh decoding are disclosed. The method for mesh decoding includes decoding a frame that includes pixels from the bitstream. A portion of the pixels of the frame represent geometric locations of vertices of a 3D mesh that are organized into overlapped patches The method further includes decoding connectivity information from the bitstream. Additionally, the method includes identifying triangles associated with the overlapped patches The triangles represented in an overlapped patch of the overlapped patches are allocated to a projection direction based on a normal vector associated with each of the triangles of the overlapped patch. The method also includes reconstructing the 3D mesh based on the connectivity information and the overlapped patches.

公开(公告)号：WO2020145654A1

公开(公告)日：2020-07-16

申请号：PCT/KR2020/000327

申请日：2020-01-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： BUDAGAVI, Madhukar ,  NAJAF-ZADEH, Hossein ,  JOSHI, Rajan Laxman

IPC: G06T9/00 ,  H04N19/184 ,  G06T15/10

Abstract: An encoding device, a method of encoding, and decoding device for point cloud compression of a 3D point cloud. The encoding device is configured to generate, for the three-dimensional (3D) point cloud, at least a set of geometry frames and a set of occupancy map frames for points of the 3D point cloud. The encoding device is also configured to select an occupancy precision value based on a quantization parameter (QP) associated with at least one generated geometry frame in the set of geometry frames, subsample at least one occupancy map frame in the set of occupancy map frames based on the selected occupancy precision value, and encode the set of geometry frames and the set of occupancy map frames into a bitstream for transmission.

公开(公告)号：WO2020141946A1

公开(公告)日：2020-07-09

申请号：PCT/KR2020/000142

申请日：2020-01-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： JOSHI, Rajan Laxman ,  BUDAGAVI, Madhukar ,  DAWAR, Neha

IPC: G06T9/00 ,  H04N19/184 ,  G06T15/10

Abstract: A decoding device, an encoding device and methods for point cloud encoding and decoding are disclosed. The method for decoding includes decoding an attribute frame, a geometry frame, and occupancy map frame from a received bitstream. The attribute and geometry frames include pixels representing points of a 3D point cloud and the occupancy map frame includes values. The method also includes generating a binary occupancy map frame based on comparing the values in the occupancy map frame to a scaling threshold to determine whether the pixels included in the attribute and geometry frames at corresponding positions in the binary occupancy map frame are valid pixels. The method further includes generating the 3D point cloud using the attribute frame, the geometry frame, and the binary occupancy map frame.

公开(公告)号：WO2020130750A1

公开(公告)日：2020-06-25

申请号：PCT/KR2019/018318

申请日：2019-12-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： NAJAF-ZADEH, Hossein ,  BUDAGAVI, Madhukar ,  JOSHI, Rajan Laxman

IPC: G06T9/00 ,  G06T5/00 ,  H04N19/184

Abstract: A method and decoder for point cloud decoding. The method includes receiving and decoding a bitstream into multiple frames that include patches corresponding to respective clusters of points from a 3D point cloud. The method also includes generating a grid that includes a plurality of 3D cells, wherein the 3D point cloud is within the grid. The method further includes identifying a first cell of the plurality of 3D cells that includes a query point corresponding to a pixel on a boundary of one of the patches. The method additionally includes identifying a luminance value of the first cell. The method also includes performing color smoothing on the query point based on comparison of the luminance value of the first cell to a threshold.

公开(公告)号：WO2020071808A1

公开(公告)日：2020-04-09

申请号：PCT/KR2019/012948

申请日：2019-10-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： JOSHI, Rajan Laxman

IPC: G06T9/00 ,  G06T7/50 ,  H04N19/597 ,  H04N19/172

Abstract: A decoding device, an encoding device and methods for point cloud encoding and decoding are disclosed. The method for decoding includes receiving a bitstream and decoding from the bit stream a first and second frame that is associated with a delta index. The first and second frames include patches that represent a 3D point cloud at different instances in time. The method additionally includes determining, based on decoding the delta index, that at least one of the patches included in the second frame matches a corresponding patch included in the first frame. The method further includes identifying a predictor index for a current patch; identifying a reference index associated with a reference patch in the first frame based on the delta index and the predictor index; and generating the 3D point cloud using the first frame, the second frame, and the reference patch.

公开(公告)号：WO2019190278A1

公开(公告)日：2019-10-03

申请号：PCT/KR2019/003733

申请日：2019-03-29

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： JOSHI, Rajan Laxman ,  BUDAGAVI, Madhukar

IPC: G06T9/00 ,  H04N19/597 ,  H04N19/172 ,  H04N19/124 ,  H04N19/593

Abstract: A method for point cloud encoding includes generating, for a 3D point cloud, first and second frames representing the 3D point cloud at different depths, wherein the first and second frames each include a set of patches representing a cluster of points of the 3D point cloud. The method also includes encoding the first frame. After encoding the first frame, the method includes decoding the first frame. The method further includes generating a third frame representing a difference between corresponding points of the second frame and the decoded first frame. The method additionally includes encoding the third frame. The method also includes generating a compressed bitstream including the encoded first frame and the encoded third frame. The method further includes transmitting the compressed bitstream.

公开(公告)号：WO2022060182A1

公开(公告)日：2022-03-24

申请号：PCT/KR2021/012864

申请日：2021-09-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： JOSHI, Rajan Laxman ,  BUDAGAVI, Madhukar

IPC: H04N19/597 ,  H04N19/184 ,  H04N19/119 ,  H04N19/44 ,  G06T9/00

Abstract: A decoding device for point cloud decoding includes a communication interface and a processor. The communication interface configured to receive a bitstream. The processor is configured to identify, from the bitstream, messages and one or more sub-bitstreams representing a three-dimensional (3D) point cloud. The processor is configured to identify a query label indicating an object of the 3D point cloud for decoding. In response to determining that the query label corresponds to a label, the processor is configured to identify a 3D scene object associated with the query label. The processor is configured to identify a 2D tile that correspond to the 3D scene object. The processor is configured to determine to decode, based on an identification of the 2D tile from the sub-bitstream, a portion of the sub-bitstream corresponding to the 2D tile to generate a portion of a video frame representing a portion of the 3D scene object.

公开(公告)号：WO2022039579A1

公开(公告)日：2022-02-24

申请号：PCT/KR2021/011218

申请日：2021-08-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： FARAMARZI, Esmaeil ,  BUDAGAVI, Madhukar ,  JOSHI, Rajan Laxman

IPC: H04N19/597 ,  H04N19/20 ,  H04N19/184 ,  G06T9/00 ,  G06T7/11

Abstract: An encoding device and a method for point cloud encoding are disclosed. The method includes segmenting an area including points representing a three-dimensional (3D) point cloud into multiple voxels. The method also includes generating a patch information for each of the multiple voxels that include at least one of the points of the 3D point cloud. The method further includes assigning the patch information of the multiple voxels to the points included in each respective voxel, to generate patches that represent the 3D point cloud based on the patch information of the multiple voxels. Additionally, the method includes generating frames that include pixels that represent the patches. The method also includes encoding the frames to generate a bitstream and transmitting the bitstream.

公开(公告)号：WO2021206516A1

公开(公告)日：2021-10-14

申请号：PCT/KR2021/004527

申请日：2021-04-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： KOLAN, Prakash Reddy ,  JOSHI, Rajan Laxman ,  BUDAGAVI, Madhukar ,  LIM, Youngkwon

IPC: H04N7/15 ,  H04N7/14 ,  H04N21/81 ,  H04N21/235 ,  H04N21/435

Abstract: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure provides a method and device for providing volumetric conversational service.

公开(公告)号：WO2021141400A1

公开(公告)日：2021-07-15

申请号：PCT/KR2021/000175

申请日：2021-01-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： NAJAF-ZADEH, Hossein ,  JOSHI, Rajan Laxman ,  BUDAGAVI, Madhukar

IPC: H04N19/597 ,  H04N19/184 ,  H04N19/44 ,  G06T9/00 ,  G06T17/205 ,  G06T5/002 ,  G06T5/006 ,  G06T9/001

Abstract: A method for point cloud decoding includes receiving a bitstream. The method also includes decoding the bitstream into multiple frames that include pixels. Certain pixels of the multiple frames correspond to points of a three-dimensional (3D) point cloud. The multiple frames include a first set of frames that represent locations of the points of the 3D point cloud and a second set of frames that represent attribute information for the points of the 3D point cloud. The method further includes reconstructing the 3D point cloud based on the first set of frames. Additionally, the method includes identifying a first portion of the points of the reconstructed 3D point cloud based at least in part on a property associated with the multiple frames. The method also includes modifying a portion of the attribute information. The portion of the attribute information that is modified corresponds to the first portion of the points.