Displacement Quantization Syntax with Independent Parameter Structures

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Solution Overview

Problem

The Video-based Dynamic Mesh Compression (VDMC) standard suffers from inefficiencies due to quantization parameters being transmitted within the lifting transform parameters structure, which are not independent and affect performance when the lifting transform is selected.

Innovation Solution

Quantization-related parameters are removed from the lifting transform parameters structure and placed into an independent quantization parameter structure, allowing for independent adjustment of quantization and lifting transform without affecting each other, with flags indicating the presence of the quantization parameter structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If quantization parameters are transmitted inside the lifting transform parameters structure, then the lifting transform can be selected, but the quantization parameters cannot be independently adjusted and performance is affected

Engineering Contradiction:

Improveindependent adjustment of quantization parametersVSAvoidstructure coupling between lifting transform and quantization parameters

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the previously coupled lifting transform parameters structure by extracting quantization-related parameters into a separate quantization parameters structure. This segmentation allows independent configuration and adjustment of quantization parameters without affecting lifting transform settings, thereby improving adaptability while reducing structural complexity coupling.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts quantization parameters from the lifting transform parameters structure and places them in an independent quantization parameters structure. This extraction enables the quantization parameters to be independently adjusted and transmitted separately, resolving the contradiction between adaptability and structural coupling.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If quantization parameters are embedded in lifting transform structure, then transmission is simplified, but displacement quantized values cannot be processed when lifting transform is not selected

Engineering Contradiction:

Improveencoding efficiency of displacement quantized valuesVSAvoidflexibility to handle different transform methods

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent creates a universal quantization parameters structure that can be used independently of the lifting transform selection. This structure can handle displacement quantized values regardless of whether lifting transform is selected or not, improving both encoding efficiency and flexibility to adapt to different transform methods.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent introduces dynamic flags to indicate the presence and usage of quantization parameters based on the selected transform method. This dynamic approach allows the system to efficiently process displacement quantized values when needed while maintaining flexibility to adapt to different encoding scenarios.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12445613B2Displacement quantization syntax

Publication Date: 2025.10.14 SONY GROUP CORP

AI summary

Quantization-related parameters are removed from the lifting transform parameters structure and have an independent structure referred to as quantization parameters that will contain the quantization-related information. The modified implementation has no performance difference from a reference implementation, and the modified implementation now can address displacement quantized values, even if they were not transformed.