Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163768
Title: Real-time LiDAR point cloud compression using bi-directional prediction and range-adaptive floating-point coding
Authors: Zhao, Lili
Ma, Kai-Kuang
Lin, Xuhu
Wang, Wenyi
Chen, Jianwen
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Zhao, L., Ma, K., Lin, X., Wang, W. & Chen, J. (2022). Real-time LiDAR point cloud compression using bi-directional prediction and range-adaptive floating-point coding. IEEE Transactions On Broadcasting, 68(3), 620-635. https://dx.doi.org/10.1109/TBC.2022.3162406
Project: M4082184
Journal: IEEE Transactions on Broadcasting
Abstract: Due to the large amount of data involved in the three-dimensional (3D) LiDAR point clouds, point cloud compression (PCC) becomes indispensable to many real-time applications. In autonomous driving of connected vehicles for example, point clouds are constantly acquired along the time and subjected to be compressed. Among the existing PCC methods, very few of them have effectively removed the temporal redundancy inherited in the point clouds. To address this issue, a novel lossy LiDAR PCC system is proposed in this paper, which consists of the inter-frame coding and the intra-frame coding. For the former, a deep-learning approach is proposed to conduct bi-directional frame prediction using an asymmetric residual module and 3D space-time convolutions; the proposed network is called the bi-directional prediction network (BPNet). For the latter, a novel range-adaptive floating-point coding (RAFC) algorithm is proposed for encoding the reference frames and the B-frame prediction residuals in the 32-bit floating-point precision. Since the pixel-value distribution of these two types of data are quite different, various encoding modes are designed for providing adaptive selection. Extensive simulation experiments have been conducted using multiple point cloud datasets, and the results clearly show that our proposed PCC system consistently outperforms the state-of-the-art MPEG G-PCC in terms of data fidelity and localization, while delivering real-time performance.
URI: https://hdl.handle.net/10356/163768
ISSN: 0018-9316
DOI: 10.1109/TBC.2022.3162406
Rights: © 2022 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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