公开(公告)号：US20240282014A1

公开(公告)日：2024-08-22

申请号：US18637212

申请日：2024-04-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kirill Sergeevich Mityagin ,  Roman Igorevich Chernyak ,  Chenxi Tu

IPC: G06T9/00 ,  G06T9/40

CPC classification number: G06T9/002 ,  G06T9/40

Abstract: Methods and apparatuses are provided for entropy encoding and decoding data of a three-dimensional point cloud, which includes for a current node in an N-ary tree-structure representing the three-dimensional point cloud, extracting features of a set of the neighboring nodes of the current node by applying a neural network including an attention layer. Probabilities of information associated with the current node is estimated based on the extracted features. The information associated with the current node is entropy encoded based on the estimated probabilities.

公开(公告)号：US20240102826A1

公开(公告)日：2024-03-28

申请号：US18526721

申请日：2023-12-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoran Cao ,  Kangying Cai ,  Pei Wang ,  Chenxi Tu ,  Qi Su

IPC: G01C21/00 ,  G06T9/00

CPC classification number: G01C21/3896 ,  G06T9/00

Abstract: An apparatus and a method for encoding a 3D map are provided. The apparatus for encoding a 3D map includes a compression module (51) and a transmission module (52). The compression module (51) is configured to compress data of a 3D map to obtain a bitstream of the 3D map, where the 3D map includes a plurality of 3D map points, and the data of the 3D map includes data of the plurality of 3D map points. The transmission module (52) is configured to transmit the bitstream of the 3D map. With the use of the apparatus, a data volume of a 3D map can be reduced, thereby reducing transmission bandwidth and improving transmission efficiency.

公开(公告)号：US20240314350A1

公开(公告)日：2024-09-19

申请号：US18672686

申请日：2024-05-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chenxi Tu ,  Kangying Cai ,  Xiaoran Cao

IPC: H04N19/52 ,  G01S7/48 ,  G01S17/89

CPC classification number: H04N19/52 ,  G01S7/4808 ,  G01S17/89

Abstract: Method and apparatus for compressing lidar data provide for obtaining to-be-compressed data, where the to-be-compressed data is measurement data collected by lidar through N transmissions, where N≥1. When the to-be-compressed data includes corresponding distance measurement data and signal intensity measurement data, the distance measurement data is compressed to obtain a first bitstream. Signal intensity measurement data is predicted based on the distance measurement data to obtain a second bitstream.

公开(公告)号：US20240296592A1

公开(公告)日：2024-09-05

申请号：US18649653

申请日：2024-04-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kirill Sergeevich Mityagin ,  Roman Igorevich Chernyak ,  Chenxi Tu

IPC: G06T9/00 ,  G06T9/40

CPC classification number: G06T9/002 ,  G06T9/40

Abstract: A point cloud data coding method and related coding devices are provided. The method comprises: obtaining an N-ary a tree representation of point cloud data; determining probabilities for entropy coding of information associated with of a current node of the tree, including: selecting a neural network, out of two or more pretrained neural networks, according to a level of the current node within the tree, obtaining the probabilities by processing input data related to the current node by the selected neural network; and entropy coding of the information associated with the current node using the determined probabilities.

公开(公告)号：US20240119639A1

公开(公告)日：2024-04-11

申请号：US18526677

申请日：2023-12-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoran Cao ,  Kangying Cai ,  Pei Wang ,  Chenxi Tu ,  Qi Su

IPC: G06T9/00 ,  G06T17/05

CPC classification number: G06T9/00 ,  G06T17/05

Abstract: An apparatus and a method for decoding a 3D map, and an encoded bitstream of a 3D map are provided. The apparatus for decoding a 3D map includes a transmitter and a decompressor. The transmitter is configured to receive a bitstream of a 3D map, where the 3D map includes a plurality of 3D map points. The decompressor is configured to decompress the bitstream of the 3D map to obtain reconstructed data of the 3D map, where the reconstructed data of the 3D map includes reconstructed data of the plurality of 3D map points. In this application, the decompressor end may support decompression of compressed data of the 3D map, to support compression/decompression of data of the 3D map.

公开(公告)号：US20240104781A1

公开(公告)日：2024-03-28

申请号：US18528022

申请日：2023-12-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaoran Cao ,  Pei Wang ,  Kangying Cai ,  Chenxi Tu

IPC: G06T9/00

CPC classification number: G06T9/00

Abstract: A three-dimensional (3D) map compression method includes performing compaction processing on a to-be-encoded descriptor to obtain a first compact representation of the to-be-encoded descriptor, where the to-be-encoded descriptor corresponds to at least one 3D map point on a 3D map. A compact representation of at least one reference descriptor corresponding to the to-be-encoded descriptor is obtained, followed by obtaining a second compact representation of the to-be-encoded descriptor based on the first compact representation of the to-be-encoded descriptor and the compact representation of the at least one reference descriptor and encapsulating the second compact representation to obtain a bitstream of the 3D map.