Spatial Audio Processing with Variable Focus Distance Adaptation
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Solution Overview
Problem
Current spatial audio technologies for virtual reality applications lack adaptability and flexibility, often providing a conventional audio experience that does not align well with the immersive visual experiences, failing to effectively adapt to user movements and focus changes.
Innovation Solution
A spatial audio processing apparatus that receives audio scene data, adjusts the perceptual emphasis of audio components based on a variable focus distance, and renders the audio components to enhance user focus and control, ensuring a consistent and immersive audio experience by emphasizing audio sources relative to the user's current focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional spatial audio processing is used, then the audio experience is simple and easy to implement, but the adaptability to user movements and focus changes is poor
Solution Approach 1:
The audio processing system dynamically adjusts the perceptual emphasis of audio components based on the user's variable focus distance. The adapter continuously modifies audio parameters in response to changing focus distances, enabling the system to adapt to user movements and attention shifts in real-time, transforming a static audio system into a dynamic one that responds to user behavior.
Solution Approach 2:
The system changes the perceptual emphasis parameter of audio components based on their distance from the user's focal point. By adjusting audio parameters (such as volume, panning, or spatial characteristics) according to the variable focus distance, the system achieves adaptive spatial audio without requiring complex hardware modifications, resolving the contradiction between adaptability and complexity.
2Ease of operation
If audio components are emphasized based on variable focus distance, then user control and spatial consistency are improved, but processing complexity increases
Solution Approach 1:
The audio processing system automatically adjusts perceptual emphasis based on the variable focus distance without requiring direct user intervention for each adjustment. The adapter self-regulates audio parameters by comparing the variable focus distance with audio component positions, enabling intuitive user control through natural focus movements while the system handles the complex processing automatically.
3Reliability
If the perceptual emphasis of spatial audio components is adapted, then the spatial audio experience is enhanced, but the computational requirements increase
Solution Approach 1:
The system applies perceptual emphasis adaptation selectively to audio components based on their spatial relationship to the variable focus distance. Rather than processing all audio components uniformly, the adapter focuses computational resources on components that are relevant to the user's current focus, improving audio experience quality while reducing overall computational energy consumption through localized processing.
Data Source
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AI summary
A spatial audio processing apparatus comprises a receiver (101) for receiving audio scene data describing an audio scene comprising spatial audio components and associated position data. The audio components may be provided as audio objects. A distance unit (105) provides a position indication which includes a focus distance that is indicative of a distance from a reference position in the audio scene. An adapter (103) adapts a perceptual emphasis property, such as an audio level, frequency distribution, or degree of diffuseness, of a spatial audio component relative to at least one other spatial audio component of the audio scene in response to a difference measure reflecting a difference between the focus distance and a distance in the audio scene from the reference position to a position of the spatial audio component. An audio renderer (107) renders the resulting audio scene using the received position data. The approach may emphasize audio at the focus distance in the audio scene.