Real-Time Reverberation Processing Through Sound-Ray Scene Mapping
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Solution Overview
Problem
Existing environmental acoustic simulation methods struggle to accurately simulate dynamically changing scenes in real-time while maintaining computational efficiency, particularly on devices with limited computing power, due to high computational demands and inaccuracy in rendering multiple sound sources and listener rotations.
Innovation Solution
A method and device that estimate scene shape and material parameters from sound ray intersections, calculating reverberation time and performing dynamic reverberation processing using all-pass filters and feedback gains, allowing real-time adaptation to changing environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wave solvers based on finite element analysis are used to simulate environmental acoustic phenomena, then simulation accuracy is improved, but computational complexity and processing time increase significantly
Solution Approach 1:
The patent divides the complex acoustic simulation into separate modules: sound source processing, spatial audio rendering, and reverberation processing. Each module handles specific acoustic phenomena independently, allowing the system to achieve accurate simulation without requiring computationally intensive wave solvers for all aspects simultaneously.
Solution Approach 2:
The patent replaces complex physical wave simulation with mathematical modeling and signal processing techniques. Instead of using computationally heavy finite element analysis to simulate acoustic waves physically, the system uses mathematical algorithms to calculate acoustic parameters and generate virtual reverberation effects through digital signal processing.
2Productivity
If ray tracing methods are used to simulate environmental acoustic phenomena, then computational efficiency is improved, but accuracy in rendering multiple sound sources and listener rotations deteriorates
Solution Approach 1:
The patent implements dynamic adaptation of reverberation parameters based on listener position and orientation. The system calculates acoustic parameters in real-time according to the listener's spatial coordinates and rotation angles, allowing accurate rendering of multiple sound sources while maintaining computational efficiency through dynamic parameter adjustment rather than complex geometric tracing.
Solution Approach 2:
The patent changes acoustic parameters such as reverberation time, absorption rate, and scattering rate dynamically based on the listener's position and the scene configuration. By adjusting these parameters rather than performing complex ray tracing for each sound source, the system achieves accurate rendering with improved computational efficiency.
3Device complexity
If simplification of the geometric shape of the environment is used, then device complexity is reduced, but acoustic simulation accuracy deteriorates
Solution Approach 1:
The patent creates a virtual acoustic model that copies the essential acoustic characteristics of the real environment without requiring precise geometric replication. The system calculates acoustic parameters based on simplified scene representations and material properties, achieving accurate acoustic simulation without the computational burden of complex geometric processing.
Solution Approach 2:
The patent focuses on accurately representing acoustic parameters such as absorption rate, scattering rate, and reverberation time rather than precisely modeling the geometric shape of the environment. By changing the representation from geometric detail to acoustic parameter detail, the system maintains simulation accuracy while reducing geometric processing complexity.
4Reliability
If high-quality sound rendering is achieved in virtual environments, then user immersion is improved, but computational resources required increase
Solution Approach 1:
The patent segments the audio processing into distinct stages: direct sound rendering, early reflections, and reverberation. Each stage uses appropriate computational methods matched to its requirements, allowing high-quality sound rendering that maintains user immersion while optimizing computational resource consumption by applying complex processing only where necessary.
Solution Approach 2:
The patent pre-calculates and stores acoustic parameters and reverberation characteristics for different scene configurations and material combinations. This preliminary action allows the system to quickly retrieve and apply pre-computed acoustic models during real-time rendering, reducing the computational resources required for high-quality sound rendering while maintaining user immersion.
Data Source
AI summary
A reverberation processing method and apparatus, and a non-transitory computer readable storage medium. The reverberation processing method includes: estimating shape information of a scene according to a plurality of intersection points of a plurality of sound rays centered on a listener with the scene; calculating a first average acoustic parameter value of a scene material of the scene according to first acoustic parameter values of scene materials at positions of the plurality of intersection points; and calculating a reverberation time according to the shape information of the scene and the first average acoustic parameter value.