Mesh Decoding Device Wavelet Transform Encoding Efficiency
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Solution Overview
Problem
Existing mesh encoding technologies struggle with low encoding efficiency due to the need for lossless encoding of vertex coordinates and connection information, even when lossy encoding is allowed.
Innovation Solution
A mesh decoding device and method that decodes a displacement bit stream by inversely quantizing level values and applying an inverse wavelet transform to generate displacements, thereby improving encoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lossless encoding is applied to vertex coordinates and connection information, then encoding accuracy is maintained, but encoding efficiency deteriorates due to large information volume
Solution Approach 1:
The patent transforms vertex coordinates from spatial domain to frequency domain using wavelet transform, then applies quantization to change the precision parameters selectively. This allows high precision for important coefficients and lower precision for less important ones, resolving the contradiction between accuracy and efficiency
Solution Approach 2:
The patent extracts and encodes only the essential features of the mesh data through wavelet transform and quantization, separating critical information from redundant details. This extraction process reduces the information volume significantly while preserving the most important geometric characteristics
2Manufacturing precision
If all vertex information is encoded completely, then mesh reconstruction accuracy is improved, but information volume increases leading to lower encoding efficiency
Solution Approach 1:
The patent changes the representation parameters of vertex information by applying wavelet transform and selective quantization. This transforms the complete vertex data into a compressed form where only essential parameters are retained at high precision, while less critical parameters are quantized with lower precision, reducing overall information volume
Solution Approach 2:
The patent applies partial encoding action by selectively encoding only the most significant wavelet coefficients with high precision while using lower precision for less significant coefficients. This partial action approach maintains sufficient reconstruction accuracy while significantly reducing the total information volume
Data Source
AI summary
A mesh decoding device (200) includes: a circuit that decodes a displacement bit stream to generate and output a displacement, wherein the circuit: decodes a level value from the displacement bit stream, generates a transformed coefficient by inversely quantizing the level value, and generates the displacement by applying an inverse wavelet transform to the transformed coefficient.