Object-Based Audio Rendering Distance Attenuation
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Solution Overview
Problem
Existing audio rendering technologies for object-based audio in virtual reality environments fail to effectively manage sound volume attenuation, leading to potential hearing damage and clipping issues due to the lack of precise distance-based gain adjustments.
Innovation Solution
A method for rendering object-based audio that identifies metadata to determine a minimum distance for attenuation, calculating gains based on the audio source distance and reference distance, and applying these calculations to prevent excessive sound levels, thereby protecting listeners from loud sounds and ensuring natural audio rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If distance-based gain adjustment is applied to object-based audio rendering, then sound volume control and hearing protection are improved, but system complexity increases due to additional metadata processing and minimum distance calculation
Solution Approach 1:
The system performs preliminary calculation of the minimum distance between the audio source and listener before applying gain adjustments. By pre-determining this minimum distance based on audio source characteristics and listener position, the system establishes a safety boundary that prevents excessive sound levels without requiring complex real-time adjustments during audio playback
Solution Approach 2:
The system dynamically adjusts the gain parameter based on the calculated minimum distance and actual audio source distance. When the audio source is within the minimum distance threshold, the system applies a fixed gain to prevent clipping and hearing damage. When beyond the threshold, the system applies distance-based attenuation, smoothly transitioning between these two regimes to maintain natural audio perception while protecting against harmful sound levels
2Manufacturing precision
If minimum distance is set based on reference distance and gain adjustments, then audio rendering accuracy is improved, but computational overhead increases
Solution Approach 1:
The system applies different gain adjustment strategies based on the local condition of the audio source distance. For sources within the minimum distance, a fixed gain is applied to maintain accuracy. For sources beyond the minimum distance, distance-based attenuation is applied. This localized approach to gain adjustment maintains high audio rendering accuracy for near-field sources while using efficient attenuation for far-field sources, reducing overall computational overhead
3Reliability
If distance-based attenuation is applied when audio source distance exceeds minimum distance, then natural audio perception is improved, but risk of sound clipping increases when distance calculation is imprecise
Solution Approach 1:
The system establishes a minimum distance threshold that acts as a safety cushion before applying distance-based attenuation. By ensuring that the minimum distance is sufficiently large, the system creates a buffer zone that prevents the audio gain from becoming too high even when distance calculations have some imprecision. This cushioning effect maintains natural audio perception while protecting against clipping caused by measurement errors
Data Source
AI summary
A method of rendering object-based audio and an electronic device performing the method are disclosed. The method includes identifying metadata of object-based audio, identifying an audio source distance between the object-based audio and a listener using the metadata, determining a minimum distance of the object-based audio to apply attenuation according to the audio source distance, based on a reference distance of the object-based audio in the metadata, and rendering the object-based audio using the audio source distance and the minimum distance.