G-PCC Point Cloud Transmission with Temporal Track Separation

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Solution Overview

Problem

Existing technologies face challenges in efficiently processing large volumes of point cloud data, managing latency and encoding/decoding complexity, and supporting temporal scalability in point cloud content processing.

Innovation Solution

The method involves obtaining and generating a G-PCC temporal scalability group box from a track in the G-PCC file, combining tracks based on specific sample entry types, and using a transmission and reception device with processors to manage point cloud data efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If point cloud data is processed using traditional methods, then processing can be performed, but processing efficiency is low and latency is high

Engineering Contradiction:
Improveprocessing efficiencyVSAvoidlatency
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent segments point cloud data into multiple layers based on depth distance, creating a hierarchical structure where points are organized into near, mid, and far layers. This segmentation enables parallel processing of different layers and reduces the computational complexity of handling all points simultaneously, thereby improving processing efficiency and reducing latency.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a depth-based dimensional organization by sorting points according to their distance from the camera and arranging them in multiple layers along the depth axis. This dimensional transformation from a uniform point set to a layered spatial structure enables more efficient memory access patterns and reduces processing latency.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Manufacturing precision

If detailed point cloud processing is performed, then processing accuracy is improved, but encoding/decoding complexity increases

Engineering Contradiction:
Improveprocessing accuracyVSAvoidencoding/decoding complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent divides the point cloud into multiple layers based on depth, allowing different processing strategies to be applied to each layer. This segmentation maintains processing accuracy for near points while using coarser representations for far points, thereby reducing overall encoding/decoding complexity without sacrificing critical detail.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies different processing qualities to different spatial regions by organizing points into layers where near layers (containing more detailed information) are processed with higher fidelity and far layers are processed with reduced complexity. This local quality approach maintains accuracy where needed while reducing complexity in less critical regions.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS20250259333A1Transmission device for point cloud data, method performed by transmission device, reception device for point cloud data, and method performed by reception device
Publication Date: 2025.08.14 LG ELECTRONICS INC
  • US20250259333A1 patent drawing
  • US20250259333A1 patent drawing
  • US20250259333A1 patent drawing

AI summary

A transmission device of point cloud data, a method performed in the transmission device, a reception device, and a method performed in the reception device are provided. A method performed by a reception device of point cloud data may comprise obtaining a geometry-based point cloud compression (G-PCC) file including the point cloud data and obtaining a G-PCC temporal scalability group box GPCCTemporalScalabilityGroupBox from a track in the G-PCC file. A sample entry type of the track is one of ‘gpel’, ‘gpeg’, ‘gpcl’ or ‘gpcg’.