Volumetric Audio Rendering With Automatic Gain Model Selection
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Solution Overview
Problem
Existing methods lack automatic rendering techniques for volumetric audio elements that accurately represent spatially heterogeneous audio sources, failing to distinguish between sources behaving as one large compound or multiple individual sources.
Innovation Solution
A method for rendering volumetric audio elements involves determining a spatial audio value (S) to select appropriate distance gain models based on spatial characteristics, using high-pass filtering, singular value decomposition, and thresholding to automatically set rendering parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If multiple copies of a mono audio element are created at positions around the audio element to represent spatially heterogeneous sources, then the perception of spatial extent is improved, but the rendering complexity increases due to the need to manage multiple audio signals and positions
Solution Approach 1:
The audio element is divided into multiple virtual audio sources distributed in 3D space around the central position. Each virtual source contributes to the overall spatial perception while maintaining a manageable rendering structure. This segmentation allows the system to represent complex spatially heterogeneous sources through multiple simpler audio elements.
Solution Approach 2:
A virtual audio element is introduced as an intermediary that automatically manages the complexity of rendering spatially heterogeneous sources. The virtual element calculates appropriate gain functions and manages multiple audio signals without requiring manual configuration, thereby reducing rendering complexity while maintaining accurate spatial representation.
2Ease of operation
If automatic rendering parameter selection is implemented based on spatial audio value, then the ease of operation is improved, but the device complexity increases due to the need for automated analysis and parameter selection algorithms
Solution Approach 1:
The rendering system performs self-service by automatically analyzing the audio signal to determine spatial audio value and selecting appropriate gain functions without external intervention. The system evaluates its own input, makes decisions about rendering parameters, and adjusts the virtual audio element configuration automatically, thereby improving ease of operation while containing automation complexity within the rendering engine itself.
Solution Approach 2:
The system automatically changes rendering parameters based on the calculated spatial audio value. When the spatial audio value indicates a volumetric source, the system changes the gain function from inverse distance law to a volumetric-based gain function. This automated parameter adjustment simplifies user operation while the complexity is managed through algorithmic approaches.
3Measurement precision
If volumetric gain functions are used for audio elements representing many individual sources, then the acoustic accuracy is improved, but the rendering complexity increases due to the need to calculate and apply complex gain functions
Solution Approach 1:
The system changes the gain function parameter based on the spatial audio value analysis. For audio elements representing volumetric sources with many individual sound sources, the system switches from simple inverse distance law gain to volumetric gain functions that accurately model acoustic propagation from extended sources. This parameter change improves acoustic accuracy while the complexity is managed through automated detection and selection.
Data Source
AI summary
A method for rendering an audio element, such as a volumetric audio element comprising two or more audio signals. In one embodiment the method includes obtaining a distance gain model rendering parameter associated with the volumetric audio element. The method also includes, based on the value of the distance gain model rendering parameter, selecting a distance gain model from a set of two or more candidate distance gain models. The method also includes rendering the volumetric audio element using the selected distance gain model.