Multizone AR Audio Mixing for Seamless Zone Transitions
Solution Overview
Problem
Existing augmented reality technologies face challenges in providing immersive and accurate audio for multizone augmented reality spaces, as current methods struggle to seamlessly transition audio and acoustic properties between different sound zones, especially in environments without physical sound barriers.
Innovation Solution
An audio processing system that identifies the experience location within a multizone augmented reality space and generates a binaural audio stream by mixing environmental audio components from overlapping sound zones, using acoustic parameters to simulate virtual sound propagation and reverberation, ensuring seamless transitions and immersive experiences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional audio processing methods are used in multizone augmented reality spaces, then the system complexity is reduced, but the audio immersion and accuracy deteriorate
Solution Approach 1:
The augmented reality space is divided into multiple sound zones, each with its own acoustic characteristics. The system segments the audio processing by identifying which sound zones are visible from the current experience location and processing audio components separately for each zone, then combining them. This allows complex multizone audio processing to be broken down into manageable segments while maintaining high audio immersion and accuracy.
Solution Approach 2:
The system dynamically adjusts the audio processing based on the current experience location and visible sound zones. As the user moves or the camera viewpoint changes, the system re-evaluates which sound zones are visible and adjusts the audio mixing and acoustic parameter application in real-time. This dynamic adaptation enables the system to maintain high audio accuracy without requiring all possible sound zones to be processed simultaneously, thus managing complexity.
2Reliability
If audio components from multiple sound zones are mixed for overlapping zones, then the audio realism is improved, but the processing complexity increases
Solution Approach 1:
The system performs preliminary identification of visible sound zones and their acoustic characteristics before mixing audio components. By pre-determining which sound zones contribute to the current experience location and preparing their respective audio components with appropriate acoustic parameters, the system simplifies the subsequent mixing process. This preliminary preparation reduces the complexity of real-time audio processing while maintaining high realism through proper mixing of multiple sound zone components.
3Measurement precision
If virtual sound propagation is simulated using acoustic parameters, then the audio accuracy is improved, but the computational requirements increase
Solution Approach 1:
The system applies acoustic parameters locally to audio components based on their specific sound zone characteristics rather than using uniform processing across all zones. Each sound zone's audio components receive tailored acoustic parameter adjustments that reflect their specific environmental properties (e.g., reverberation, attenuation, reflection patterns). This localized approach improves audio accuracy for each zone while reducing overall computational requirements by avoiding unnecessary processing of audio components that are not currently visible or relevant to the experience location.
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
The system provides high-quality, immersive audio experiences by customizing audio streams based on the user's location within the multizone space, effectively simulating sound zones with or without physical barriers, enhancing user engagement and realism.
Implementation Method 1
using acoustic parameters to simulate virtual sound propagation and reverberation
Data Source
AI summary
An illustrative audio processing system identifies an experience location with which an augmented reality presentation device is associated. The experience location is included within a multizone augmented reality space that is presented by the augmented reality presentation device. The audio processing system determines that the experience location is within both a first sound zone and a second sound zone of the multizone augmented reality space, and, based on the determining that the experience location is within both the first and second sound zones, generates a binaural audio stream for presentation by the augmented reality presentation device. The binaural audio stream includes an environmental audio component implemented by a mix of a first environmental audio stream associated with the first sound zone and a second environmental audio stream associated with the second sound zone. Corresponding methods and systems are also disclosed.