Title:
METHOD FOR ENCODING AND DECODING A POINT CLOUD
Document Type and Number:
WIPO Patent Application WO/2021/258374
Kind Code:
A1
Abstract:
Method for encoding and decoding attributes of a point cloud, as well as encoder and decoder. Therein, the method for encoding attributes of points of a point cloud to generate a bitstream of compressed point cloud data, wherein the point cloud's geometry is represented by a voxel-based structure with a plurality of nodes having parent-child relationships by recursively splitting a volumetric space containing the point cloud into sub-volumes each associated with a node of the voxel-based structure, comprises the steps of: Determining a true transform coefficient by applying Region-Adaptive Hierarchal Transform, RAHT, to the attributes of a present node; Determining a difference between the attributes of a present parent node and each node of a first set of nodes sharing a face or an edge with the present node, wherein the present parent node is the parent node of the present node; Selecting a second set from the first set of parent nodes according to the difference, wherein preferably the second set of parent nodes includes the present parent node; Determining a predicted value for the attributes of the present node according to the attributes of the second set of parent nodes; Determining a predicted transform coefficient by applying RAHT to the predicted value of the attributes of the present node; Determining a residual from the true transform coefficient and the predicted transform coefficient; and Encoding the residual to produce encoded data of attributes of the point cloud for the bitstream.
More Like This:
| JP3609097 | PICTURE ENCODING REPRODUCING DEVICE |
| JPH06133962 | IMAGE PROCESSOR |
| WO/2003/058978 | SCALABLE MULTI-LEVEL VIDEO CODING |
Inventors:
ZHANG WEI (CN)
CHAMPEL MARY-LUC GEORGES HENRY (CN)
CHAMPEL MARY-LUC GEORGES HENRY (CN)
Application Number:
PCT/CN2020/098272
Publication Date:
December 30, 2021
Filing Date:
June 24, 2020
Export Citation:
Assignee:
BEIJING XIAOMI MOBILE SOFTWARE CO LTD (CN)
UNIV XIDIAN (CN)
UNIV XIDIAN (CN)
International Classes:
G06T9/00; G06T9/40; H04N19/61
Domestic Patent References:
| WO2019195922A1 | 2019-10-17 |
Foreign References:
| US20170347122A1 | 2017-11-30 | |||
| US20200021844A1 | 2020-01-16 |
Other References:
ZHANG KE; ZHU WENJIE; XU YILING: "Hierarchical Segmentation Based Point Cloud Attribute Compression", 2018 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP), IEEE, 15 April 2018 (2018-04-15), pages 3131 - 3135, XP033400969, DOI: 10.1109/ICASSP.2018.8461644
PAVEZ EDUARDO; CHOU PHILIP A.: "Dynamic polygon cloud compression", 2017 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP), IEEE, 5 March 2017 (2017-03-05), pages 2936 - 2940, XP033258951, DOI: 10.1109/ICASSP.2017.7952694
PAVEZ EDUARDO; CHOU PHILIP A.: "Dynamic polygon cloud compression", 2017 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP), IEEE, 5 March 2017 (2017-03-05), pages 2936 - 2940, XP033258951, DOI: 10.1109/ICASSP.2017.7952694
Attorney, Agent or Firm:
BEIJING BESTIPR INTELLECTUAL PROPERTY LAW CORPORATION (CN)
Download PDF: