Progressive 3D Mesh Reconstruction for Low-Latency Transmission
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Solution Overview
Problem
Existing technologies face challenges in efficiently transmitting and receiving mesh data due to the large amount of points in 3D space, requiring high throughput, and encounter issues with latency and encoding/decoding complexity.
Innovation Solution
The proposed solution involves a method and apparatus that include a base mesh decoder, displacement information decoder, reconstructor, and texture map decoder for efficient mesh data transmission, utilizing techniques such as video codec-based decoding and arithmetic encoding to manage scalability and resource distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mesh data with a considerable number of points is transmitted, then the quality of 3D content is improved, but the throughput requirement increases
Solution Approach 1:
The patent segments mesh data into multiple levels of detail (LOD), where a base mesh provides coarse geometry and additional displacement information layers progressively refine the detail. This segmentation allows receivers to reconstruct high-quality mesh data by combining multiple segmented layers, reducing the need to transmit the complete high-resolution mesh data in one stream.
Solution Approach 2:
The patent implements a nested structure where displacement information is organized in multiple levels (LoD0, LoD1, LoD2, etc.), with each level containing refinement data for the previous level. The base mesh is nested within the first displacement level, which is nested within the second level, and so on. This nested organization allows progressive reconstruction of mesh detail while managing transmission efficiency.
2Measurement precision
If complete mesh data is transmitted, then the accuracy of 3D representation is improved, but the latency increases
Solution Approach 1:
The patent performs preliminary action by transmitting the base mesh data first, which provides a complete but low-detail representation of the 3D object. Receivers can immediately reconstruct and display this base level mesh, providing timely albeit coarse 3D representation. Subsequent displacement information levels are transmitted and applied progressively to enhance accuracy without delaying the initial 3D content delivery.
3Measurement precision
If complete mesh data is transmitted, then the quality of 3D content is improved, but the encoding/decoding complexity increases
Solution Approach 1:
The patent segments the complex task of mesh encoding/decoding into manageable stages: base mesh encoding/decoding, followed by sequential processing of displacement information levels. Each displacement level is processed independently and applied to refine the mesh progressively. This segmentation reduces the computational complexity at any single processing stage compared to handling complete high-resolution mesh data in one operation.
Solution Approach 2:
The patent enables partial action by allowing receivers to process and display mesh data at any desired level of detail. Receivers can choose to reconstruct only the base mesh for low-complexity applications, or progressively apply displacement levels LoD0, LoD1, LoD2, etc., depending on available computational resources and quality requirements. This partial processing capability reduces encoding/decoding complexity for applications that do not require maximum detail.
4Measurement precision
If all displacement information levels are transmitted, then the mesh reconstruction quality is improved, but the data transmission volume increases
Solution Approach 1:
The patent implements dynamic adaptability where the transmission of displacement information levels can be adjusted based on network conditions, receiver capabilities, and quality requirements. Receivers can selectively process displacement levels LoD0, LoD1, LoD2, etc., up to a target level determined by available resources. This dynamic approach allows the system to optimize between transmission volume and reconstruction quality in real-time, transmitting only the necessary amount of displacement data required for the desired quality level.
Data Source
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AI summary
A mesh data decoding device according to embodiments may comprise: a base mesh decoding unit for decoding a base mesh from a base mesh bitstream; a displacement information decoding unit for decoding displacement information from a displacement vector bitstream; a reconstruction unit for reconstructing a mesh on the basis of the decoded base mesh and the decoded displacement information; and a texture map decoding unit for decoding a texture map from a texture map bitstream.