Audio Renderer Position Lag Modeling for Moving Sound Objects
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Solution Overview
Problem
Existing audio rendering technologies struggle to realistically model auditory position lag, particularly in virtual reality environments, leading to discrepancies between visual and auditory positions of moving audio objects.
Innovation Solution
An audio renderer that determines the distance between an audio object and a listener, calculates the time delay for sound propagation, modifies the audio object's position based on this delay, and models auditory position lag by considering factors like distance gain, medium absorption, and Doppler effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If auditory position lag is modeled by calculating time delay and modifying audio object position, then the realism of audio playback is improved, but the computational complexity increases
Solution Approach 1:
The patent pre-calculates and stores the relationship between distance and time delay in a lookup table during system initialization. During runtime, the audio renderer directly queries this pre-computed table to obtain time delay values, eliminating the need for real-time complex calculations and reducing computational burden while maintaining accurate auditory position lag modeling
Solution Approach 2:
The patent transforms the continuous physical parameters (distance, time delay, position modification) into discrete, quantized values suitable for digital audio processing. By converting continuous spatial relationships into discrete parameter steps, the system achieves realistic auditory positioning with reduced computational complexity through efficient data representation and processing
2Measurement precision
If the position of audio object is modified based on time delay to model auditory position lag, then the synchronization between visual and auditory positions is improved, but the processing time increases
Solution Approach 1:
The patent pre-computes time delay values for various distance ranges and stores them in a lookup table during system initialization. During audio rendering, the system directly retrieves pre-calculated time delay values based on the audio object's distance, avoiding real-time complex temporal calculations and reducing processing time while maintaining precise synchronization between visual and auditory positions
Solution Approach 2:
The patent replaces complex real-time physical calculations with a simplified data retrieval mechanism. Instead of performing continuous mathematical computations for time delay and position modification during audio rendering, the system substitutes these operations with efficient table lookups and simple arithmetic, significantly reducing processing time while preserving synchronization precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the realism of audio playback by accurately synchronizing auditory and visual positions of moving audio objects, providing a more immersive experience in virtual reality environments.
Implementation Method 1
determining a time delay required for sound of the audio object to cover the distance
Implementation Method 2
determining a distance gain and a medium absorption gain according to the modified position of the audio object
Implementation Method 3
determining a Doppler effect according to a change in the distance
Data Source
AI summary
An audio renderer for modeling an auditory position lag and a method operating the same are provided. The method includes determining a distance between a position of an audio object and a listener, determining a time delay required for sound of the audio object to cover the distance, based on the distance, modifying the position of the audio object based on the time delay, and modeling an auditory position lag of the audio object based on the modified position of the audio object.