公开(公告)号：US20250080772A1

公开(公告)日：2025-03-06

申请号：US18265850

申请日：2022-05-18

Applicant: Honor Device Co., Ltd.

Inventor： Wei Zhang ,  Fuzheng Yang ,  Tian Chen ,  Wenjie Zou

IPC: H04N19/60

Abstract: An encoding method includes: obtaining original point cloud data; transforming coordinates of the original point cloud data to obtain a coordinate transformation residual; establishing a relationship between azimuth information of a point cloud and the coordinate transformation residual; determining an encoding rule for the coordinate transformation residual based on the relationship between the azimuth information of the point cloud and the coordinate transformation residual; and encoding the coordinate transformation residual according to the encoding rule, to obtain data rate information.

公开(公告)号：US12256099B2

公开(公告)日：2025-03-18

申请号：US18252052

申请日：2022-02-07

Applicant: Honor Device Co., Ltd.

Inventor： Fuzheng Yang ,  Wei Zhang

IPC: H04N19/597 ,  H04N19/172 ,  H04N19/517

Abstract: A point cloud sequence encoding/decoding method and apparatus based on two-dimensional regularized plane projection. The encoding method includes: acquiring reference-frame point cloud data and current-frame point cloud data; performing two-dimensional regularized plane projection on the reference-frame point cloud data to obtain a first two-dimensional projection plane structure, and performing two-dimensional regularized plane projection on the current-frame point cloud data to obtain a second two-dimensional projection plane structure; performing motion compensation and encoding on one or more pieces of first two-dimensional graphic information obtained based on the first two-dimensional projection plane structure and one or more pieces of second two-dimensional graphic information obtained based on the second two-dimensional projection plane structure to obtain bit stream information of the current-frame point cloud data; and repeating the foregoing steps until all frames of a point cloud sequence are encoded.

公开(公告)号：US20240070922A1

公开(公告)日：2024-02-29

申请号：US18270591

申请日：2022-05-18

Applicant: Honor Device Co., Ltd.

Inventor： Wei Zhang ,  Fuzheng Yang ,  Yuxin Du ,  Wenjie Zou

IPC: G06T9/00 ,  G06T7/521

CPC classification number: G06T9/00 ,  G06T7/521 ,  G06T2207/10028

Abstract: An encoding method includes: obtaining original point cloud data; obtaining depth information of a point cloud based on the original point cloud data; establishing a relationship between the depth information and azimuth information of the point cloud; and predictively encoding the azimuth information of the point cloud by using the relationship between the depth information and the azimuth information of the point cloud, to obtain coded stream information.

公开(公告)号：US20240037796A1

公开(公告)日：2024-02-01

申请号：US18265874

申请日：2022-05-18

Applicant: Honor Device Co., Ltd.

Inventor： Wei Zhang ,  Fuzheng Yang ,  Zexing Sun ,  Junyan Huo

IPC: G06T9/00

CPC classification number: G06T9/00

Abstract: A method for coding includes: obtaining original point cloud data; creating an adaptive prediction list of the attribute information of the point cloud; selecting a prediction mode from the adaptive prediction list and predicting the attribute information of the point cloud, to obtain a predicted residual; and coding the prediction mode and the predicted residual, to obtain codestream information.

公开(公告)号：US20240007669A1

公开(公告)日：2024-01-04

申请号：US18039633

申请日：2022-05-18

Applicant: Honor Device Co., Ltd.

Inventor： Wei Zhang ,  Fuzheng Yang ,  Ke Zhang ,  Jiarun Song

IPC: H04N19/597 ,  H04N19/105

CPC classification number: H04N19/597 ,  H04N19/105

Abstract: A method for coding includes: obtaining original point cloud data; creating an adaptive prediction list of the depth information of the point cloud; and predictively coding the depth information of the point cloud based on the adaptive prediction list, to obtain codestream information. According to the present invention, an adaptively updated prediction list of the depth information is created, and an optimal prediction mode is selected from the list to predict the depth information of the point cloud.

公开(公告)号：US20230412841A1

公开(公告)日：2023-12-21

申请号：US18252052

申请日：2022-02-07

Applicant: Honor Device Co., Ltd.

Inventor： Fuzheng Yang ,  Wei Zhang

IPC: H04N19/597 ,  H04N19/517 ,  H04N19/172

CPC classification number: H04N19/597 ,  H04N19/172 ,  H04N19/517

Abstract: The present invention discloses a point cloud sequence encoding/decoding method and apparatus based on two-dimensional regularized plane projection. The encoding method includes: acquiring reference-frame point cloud data and current-frame point cloud data; performing two-dimensional regularized plane projection on the reference-frame point cloud data to obtain a first two-dimensional projection plane structure, and performing two-dimensional regularized plane projection on the current-frame point cloud data to obtain a second two-dimensional projection plane structure; performing motion compensation and encoding on one or more pieces of first two-dimensional graphic information obtained based on the first two-dimensional projection plane structure and one or more pieces of second two-dimensional graphic information obtained based on the second two-dimensional projection plane structure to obtain bit stream information of the current-frame point cloud data; and repeating the foregoing steps until all frames of a point cloud sequence are encoded. The present invention can fully utilize spatia-temporal correlation of a point cloud sequence for encoding the point cloud sequence, which reduces temporal and spatial redundancy of the point cloud sequence and improves encoding efficiency.

公开(公告)号：US20230290007A1

公开(公告)日：2023-09-14

申请号：US18040705

申请日：2022-02-07

Applicant: Honor Device Co., Ltd.

Inventor： Fuzheng Yang ,  Wei Zhang

IPC: G06T9/00

CPC classification number: G06T9/00

Abstract: Disclosed are a point cloud encoding and decoding method and device based on a two-dimensional regularization plane projection. The encoding method includes: acquiring original point cloud data; performing two-dimensional regularization plane projection on the original point cloud data to obtain a two-dimensional projection plane structure; obtaining a plurality of pieces of two-dimensional image information according to the two-dimensional projection plane structure; and encoding the plurality of pieces of two-dimensional image information to obtain code stream information. According to the present invention, a point cloud in a three-dimensional space is projected to a corresponding two-dimensional regularization projection plane structure, and regularization correction is performed on the point cloud in a vertical direction and a horizontal direction, to obtain a strong correlation representation of the point cloud on the two-dimensional projection plane structure, so that the spatial correlation of the point cloud is better reflected; and when the plurality of pieces of two-dimensional image information are subsequently encoded, the spatial correlation of the point cloud can be greatly utilized, and the spatial redundancy is reduced, thereby further improving the encoding efficiency of the point cloud.