A Comprehensive Study and Comparison of Core Technologies for MPEG 3D Point Cloud Compression
This study provides a quantitative comparison for researchers and engineers working on 3D point cloud compression, but it is incremental as it reviews and evaluates existing standardized models without introducing new methods.
The paper compares MPEG's point cloud compression test models (TMC1, TMC2, TMC3, and merged TMC13) by analyzing their rate-distortion performance and complexity across different compression cases using 16 benchmark point clouds, finding that TMC2 performs best on average for dense point clouds, while TMC13 is optimal for sparse and noisy point clouds with lower time complexity.
Point cloud based 3D visual representation is becoming popular due to its ability to exhibit the real world in a more comprehensive and immersive way. However, under a limited network bandwidth, it is very challenging to communicate this kind of media due to its huge data volume. Therefore, the MPEG have launched the standardization for point cloud compression (PCC), and proposed three model categories, i.e., TMC1, TMC2, and TMC3. Because the 3D geometry compression methods of TMC1 and TMC3 are similar, TMC1 and TMC3 are further merged into a new platform namely TMC13. In this paper, we first introduce some basic technologies that are usually used in 3D point cloud compression, then review the encoder architectures of these test models in detail, and finally analyze their rate distortion performance as well as complexity quantitatively for different cases (i.e., lossless geometry and lossless color, lossless geometry and lossy color, lossy geometry and lossy color) by using 16 benchmark 3D point clouds that are recommended by MPEG. Experimental results demonstrate that the coding efficiency of TMC2 is the best on average (especially for lossy geometry and lossy color compression) for dense point clouds while TMC13 achieves the optimal coding performance for sparse and noisy point clouds with lower time complexity.