公开(公告)号：US11949889B2

公开(公告)日：2024-04-02

申请号：US16962646

申请日：2019-01-21

Applicant: InterDigital VC Holdings, Inc.

Inventor： Jean-Claude Chevet ,  Joan Llach Pinsach ,  Kangying Cai

IPC: H04N19/182 ,  H04N19/80

CPC classification number: H04N19/182 ,  H04N19/80

Abstract: At least one embodiment relates to a method for padding a first depth image representative of depth values of nearer points of a point cloud frame and a second depth image representative of depth values of farther points of a point cloud frame. The method also comprises encoding a video stream including a time-interleaving of said encoded first and second images. There is also provided a method comprising decoding a video stream to provide a first depth image representative of depth values of nearer points of a point cloud frame and a second depth image representative of depth values of farther points of a point cloud frame; and filtering pixel values of the second depth image by using pixel values of the first depth image.

公开(公告)号：US12136243B2

公开(公告)日：2024-11-05

申请号：US17439707

申请日：2020-01-27

Applicant: InterDigital VC Holdings, Inc.

Inventor： Joan Llach ,  Celine Guede ,  Jean-Claude Chevet

IPC: G06T9/00

Abstract: At least one embodiment relates to a method assigning a pixel value of an occupancy map either indicates that a depth value of at least one 3D sample of a point cloud frame projected along a same projection line is stored as a pixel value of at least one layer or equals a fixed-length codeword representing a depth value of at least one 3D sample projection along said projection line.

公开(公告)号：US12067695B2

公开(公告)日：2024-08-20

申请号：US18132939

申请日：2023-04-10

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Julien Ricard ,  Celine Guede ,  Jean-Claude Chevet ,  David Gendron ,  Yannick Olivier ,  Joan Llach

IPC: G06T3/4007 ,  G06T3/06 ,  G06T9/00

CPC classification number: G06T3/4007 ,  G06T3/06 ,  G06T9/001

Abstract: The present embodiments relate to a method and device. The method comprises obtaining at least one first point from at least one point of a point cloud by projecting said point of the point cloud onto a projection plane and obtaining at least one other point of the point cloud determined according to said at least one first point; determining and encoding at least one interpolation coding mode for said at least one first point based on at least one reconstructed point obtained from said at least one first point and at least one interpolation point defined by said at least one interpolation coding mode to approximate said at least one other point of the point cloud; and signaling said at least interpolation coding mode as values of image data.

公开(公告)号：US11915456B2

公开(公告)日：2024-02-27

申请号：US17282555

申请日：2019-10-04

Applicant: InterDigital VC Holdings, Inc.

Inventor： Yannick Olivier ,  Jean-Claude Chevet ,  Joan Llach

IPC: G06T9/00 ,  G06T7/10

CPC classification number: G06T9/001 ,  G06T7/10 ,  G06T2207/20021

Abstract: A method and apparatus of encoding/decoding attributes of points of a pint cloud are provided. The encoding method subdivides a bounding box bounding the points to be encoded, encodes data representative of attributes of a point by referring to a subdivision to which said point belongs to; and encode data representative of a number of points comprised in each subdivision.

公开(公告)号：US12230000B2

公开(公告)日：2025-02-18

申请号：US17046642

申请日：2019-04-03

Applicant: InterDigital VC Holdings, Inc.

Inventor： Jean-Claude Chevet ,  Yannick Olivier ,  Kangying Cai

IPC: G06T9/00

Abstract: At least one embodiment relates to a method comprising obtaining an occupancy information indicating if blocks of a 2D regular grid defined over a projection plane are associated with depth information of an orthogonal projection of at least one point of a point cloud onto said projection plane; embedding said occupancy information in an image storing said depth information; and encoding said image.

公开(公告)号：US11250597B2

公开(公告)日：2022-02-15

申请号：US16756352

申请日：2018-10-17

Applicant: InterDigital VC Holdings, Inc.

Inventor： Sebastien Lasserre ,  Celine Guede ,  Jean-Claude Chevet

IPC: G06T9/40 ,  G06T9/00

Abstract: The present principles generally relate to encoding and decoding of a point cloud representing the geometry of a point cloud representing a 3D object. According to the invention, prediction is used in the encoding process of the splitting information of the local octree-based structure and/or in the 10 encoding process of the occupancy information of the leaf cubes of the local octree-based structure. A predictor of the local octree-based structure is used for determining the context of the context-dependent entropy encoding in order to reduce the number of bits needed for the octree encoding.

公开(公告)号：US11019363B2

公开(公告)日：2021-05-25

申请号：US16630549

申请日：2018-07-09

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Sebastien Lasserre ,  Jean-Claude Chevet ,  Yannick Olivier

IPC: H04N19/597 ,  G06T9/00

Abstract: Method and device for encoding a point cloud that represents a three-dimensional (3D) object. One or more groups of temporally successive pictures are obtained. Each picture of the one or more groups comprises a first set of images, the images being spatially arranged in a same manner in each picture of the one or more groups. A second set of projections is associated with the one or more groups, a unique projection being associated with each image in such a way that a same projection is associated with only one single image and all projections are associated with the images. A first information representative of the projections is encoded. The point cloud may then be encoded according to the obtained pictures. A corresponding method and device for decoding a bitstream that comprises data representative of the encoded picture(s) are also described.

公开(公告)号：US20200252657A1

公开(公告)日：2020-08-06

申请号：US16753794

申请日：2018-10-04

Applicant: InterDigital VC Holdings, Inc.

Inventor： Sebastien LASSERRE ,  Remi JULLIAN ,  Jean-Claude Chevet

IPC: H04N19/96 ,  G06T9/40 ,  H04N19/597 ,  H04N19/147

Abstract: The present principles relate to a method and device for encoding the geometry of a point cloud representing a 3D object. The method comprises: a) obtaining (210) at least one candidate octree-based structure (Ok) with a maximum depth level (δk) from the points of said point cloud, each candidate octree-based structure (Ok) approximating the geometry of the point cloud by points associated with leaf cubes, each leaf cube being associated with a leaf node of said candidate octree-based structure (Ok); b) obtaining (230) a coding cost (Ck) for said at least one candidate octree-based structure (Ok) with a maximum depth level (δk); c) encoding (250) an optimal octree-based structure (Oopt) with a maximum depth level (δopt) obtained by optimizing (240) said coding cost obtained for said at least one candidate octree-based structure (Ok); and d) encoding (260) a depth information data (DIDopt) representative of the maximum depth level (δopt) of said optimal octree-based structure (Oopt). The present principles also relate to a decoding method and device.

公开(公告)号：US20250029284A1

公开(公告)日：2025-01-23

申请号：US18902866

申请日：2024-09-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Joan Llach ,  Celine Guede ,  Jean-Claude Chevet

IPC: G06T9/00

Abstract: At least one embodiment relates to a method assigning a pixel value of an occupancy map either indicates that a depth value of at least one 3D sample of a point cloud frame projected along a same projection line is stored as a pixel value of at least one layer or equals a fixed-length codeword representing a depth value of at least one 3D sample projection along said projection line.

公开(公告)号：US11625809B2

公开(公告)日：2023-04-11

申请号：US17259058

申请日：2019-06-28

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Celine Guede ,  Jean-Claude Chevet ,  David Gendron ,  Yannick Olivier ,  Joan Llach

IPC: G06T3/40 ,  G06T3/00 ,  G06T9/00

Abstract: The present embodiments relate to a method and device. The method comprises obtaining at least one first point from at least one point of a point cloud by projecting said point of the point cloud onto a projection plane and obtaining at least one other point of the point cloud determined according to said at least one first point; determining and encoding at least one interpolation coding mode for said at least one first point based on at least one reconstructed point obtained from said at least one first point and at least one interpolation point defined by said at least one interpolation coding mode to approximate said at least one other point of the point cloud; and signaling said at least interpolation coding mode as values of image data.