3D Virtual Environment Rendering Hierarchy for Videoconference Performance
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Solution Overview
Problem
Conventional videoconferencing technologies lack the social interaction and immersive experience of in-person meetings, and face performance issues with large participant numbers due to bandwidth and hardware limitations, leading to slow performance and reduced realism in virtual environments.
Innovation Solution
A computer-implemented method for efficient rendering in a three-dimensional virtual environment using a tree hierarchy, where nodes represent objects, with updates and transformations based on position, rotation, and scale, and optimization techniques such as deduplicating textures and materials, disabling mipmapping for alpha map models, and rendering shadow maps at different resolutions to enhance performance and realism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If videoconferencing systems handle more participants, then social interaction and immersive experience are improved, but performance slows down due to bandwidth and hardware limitations
Solution Approach 1:
The system segments the virtual environment rendering into hierarchical levels. The scene graph is divided into parent nodes and child nodes, where only relevant portions are rendered at high detail. This allows the system to handle more participants by selectively rendering only the portions of the environment where participants are located, rather than rendering the entire environment at full detail for all participants simultaneously.
Solution Approach 2:
The patent applies local quality by rendering different regions of the virtual environment at different detail levels. Areas where participants are present receive higher rendering quality, while empty or distant regions are rendered at lower quality. This optimizes computational resources by concentrating rendering power on regions that contribute to social interaction, enabling the system to support more participants without overwhelming hardware capabilities.
2Manufacturing precision
If computing power is increased to improve rendering quality, then realism is improved, but device complexity and cost increase
Solution Approach 1:
The system dynamically adjusts rendering quality based on real-time conditions such as participant location, camera orientation, and scene complexity. The rendering engine continuously evaluates which portions of the scene require high detail and adjusts resource allocation accordingly. This dynamic approach maintains high realism where needed while reducing computational requirements in other areas, avoiding the need for consistently high computational power across all scenarios.
Solution Approach 2:
The patent changes rendering parameters such as polygon count, texture resolution, and shadow map detail based on the importance and visibility of different scene elements. By adjusting these parameters dynamically, the system achieves high rendering quality for critical elements (participants, foreground objects) while using lower parameters for less important elements, thereby maintaining realism without requiring uniformly high computational power throughout the entire system.
3Measurement precision
If all objects in the scene are updated and transformed, then accuracy is improved, but processing time increases
Solution Approach 1:
The system extracts and processes only the necessary portions of the scene graph based on the current view and participant locations. Rather than updating and transforming all objects in the scene, the rendering engine identifies and processes only those objects that are visible and relevant to the current camera view and participant positions. This selective extraction maintains scene update accuracy for visible elements while dramatically reducing processing time by excluding invisible or irrelevant objects from the update cycle.
Solution Approach 2:
The patent implements preliminary action by pre-processing and organizing the scene into a hierarchical structure with parent-child relationships before rendering begins. This preliminary organization allows the system to quickly identify which child nodes need updating based on their parent nodes' state, avoiding the need to process the entire scene graph from scratch each frame. The pre-established hierarchy enables efficient traversal and selective updating, maintaining accuracy while reducing processing time.
Data Source
AI summary
Disclosed herein is a web-based videoconference system that allows for video avatars to navigate within a virtual environment. Various methods for efficient modeling, rendering, and shading are disclosed herein.