Dual Serving LOD Scheme for Mesh Decoding
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Solution Overview
Problem
Conventional methods for compressing triangular mesh data in three-dimensional objects result in suboptimal decoding experiences due to high time requirements and significant data overhead, leading to prolonged wait times for users, especially when loading high-resolution geometric content.
Innovation Solution
A dual-serving scheme is implemented, allowing clients to choose between single rate and progressive decoding strategies by generating additional information in single rate decoded LODs, enabling progressive refinement and reducing storage and transmission costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional compression methods are used for triangular mesh data, then storage and transmission costs are reduced, but decoding time increases significantly leading to prolonged user wait times
Solution Approach 1:
The patent segments the compressed data into multiple representation formats (single-rate and progressive decoders) with different decoding characteristics. By providing both single-rate compressed representations (faster decoding) and progressive representations (lower bandwidth), the system allows clients to select the appropriate decoder type based on their specific needs, thereby resolving the contradiction between decoding speed and storage/transmission efficiency
Solution Approach 2:
The system dynamically adapts to client capabilities by allowing clients to choose between single-rate and progressive decoding strategies. This dynamic selection enables the system to optimize the balance between decoding time and storage/transmission costs based on real-time client requirements, rather than using a fixed compression approach
2Manufacturing precision
If high-resolution geometric content is loaded, then visual quality is improved, but data transmission time and user wait time increase
Solution Approach 1:
The patent implements progressive decoding that allows clients to first receive and display a coarse approximation of the 3D object at lower resolution, then progressively refine the geometry over time. This partial action approach enables users to see a usable representation quickly while high-resolution details are still being transmitted, effectively reducing perceived wait time while maintaining the option for high visual quality
3Speed
If single rate decoding is used, then decoding speed is improved, but flexibility and adaptability are reduced
Solution Approach 1:
The patent creates a universal encoding system that produces both single-rate and progressive representations from the same source data. This multi-functional approach allows a single encoding process to serve multiple decoding strategies, enabling clients to select the most appropriate decoding method (single-rate for speed, progressive for adaptability) while maintaining flexibility for future decoder developments
Data Source
AI summary
Techniques of compressing level of detail (LOD) data involve generating a codec that can perform progressive refinement on a single rate decoded LOD. Nevertheless, by generating a small amount of extra information in a single rate decoded LOD, a progressive refiner can use the information provided in the single rate decoded LOD to refine the LOD. For example, in some implementations, the extra information is a corner of a face of a mesh; the progressive decoder may then begin traversal of the mesh from that corner for refinement. It is noted that the single rate decoded LODs are able to be refined by the same refinement information as the progressively decoded LODs.