Region-Based Audio Rescaling for Dynamic Extended Reality Soundfields
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Solution Overview
Problem
Existing extended reality systems face challenges in maintaining an immersive audio experience due to static audio rendering that fails to account for dynamic changes in listener position, virtual scene changes, and environmental changes during soundfield reproduction, leading to reduced immersion and limited creative capabilities.
Innovation Solution
The system dynamically rescales audio elements based on listener movement and environmental changes within the virtual and physical playback locations, using metadata to identify regions and adjust audio renderers accordingly, allowing for more immersive soundfield reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static audio rendering is used to initialize audio renderers, then the initial soundfield reproduction is improved, but the system cannot adapt to dynamic changes during playback
Solution Approach 1:
The patent implements dynamic audio element rescaling by continuously monitoring listener position and environmental changes during playback. The system adjusts the scale factor of audio elements in real-time based on the listener's movement between regions, transforming the static rendering approach into a dynamic one that adapts to changing conditions while maintaining soundfield accuracy.
2Adaptability or versatility
If audio elements are rescaled to accommodate different playback locations, then the system becomes more versatile, but the immersion and creative capabilities may be reduced
Solution Approach 1:
The patent applies different scale factors to different audio elements based on their specific regional information. When a listener moves between regions, only the audio elements in the new region are rescaled, while other elements maintain their original characteristics. This localized rescaling approach preserves immersion and creative capabilities for elements that don't require adjustment while adapting to the new playback location.
3Reliability
If dynamic rescaling is performed during soundfield reproduction, then the immersive experience is improved, but the system complexity increases
Solution Approach 1:
The system implements a feedback mechanism where the listener's position is continuously monitored and used to determine when and how to rescale audio elements. This feedback-driven approach ensures that dynamic rescaling is performed only when necessary (when listener position changes between regions), maintaining immersive experience while avoiding unnecessary processing complexity.
4Measurement precision
If the system requires one-to-one correspondence between source and playback locations, then audio accuracy is maintained, but the system loses flexibility in playback location
Solution Approach 1:
The patent changes the spatial parameters of audio elements by applying scale factors that transform the source location dimensions to match the playback location dimensions. This parameter transformation allows the system to maintain audio localization accuracy while adapting to different playback location sizes and configurations, eliminating the requirement for one-to-one correspondence.
Data Source
AI summary
In general, techniques are described that enable a device to rescale audio sources in extended reality systems. The device may include a memory configured to store metadata specified for two or more audio elements, where the metadata identifies a respective region in which each of the two or more audio elements reside within a virtual environment representative of a source location. The device may also include processing circuitry communicatively coupled to the memory, and configured to determine that a listener has moved between the two or more audio elements. The processing circuitry may also be configured to rescale, responsive to determining that the listener has moved between the two or more audio elements and based on the respective regions, the two or more audio elements to obtain at least one rescaled audio element, and reproduce the at least one rescaled audio element to obtain an output audio signal.