Reverberation Gain Normalization for Accurate Acoustic Simulation
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Solution Overview
Problem
Conventional audio systems struggle to accurately simulate the acoustic properties of virtual environments, limiting the immersive experience in virtual reality, augmented reality, and mixed reality systems.
Innovation Solution
A system is introduced that includes a reverberation processing system with a reverb initial power (RIP) control system and a reverberator, utilizing comb filters and all-pass filters to independently control reverberation properties, applying a RIP correction factor to mimic environmental effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional audio systems are used to simulate acoustic properties, then the system simplicity is maintained, but the accuracy of reverberation simulation deteriorates
Solution Approach 1:
The system segments the audio processing into distinct functional blocks: a direct path processor and a reverberation path processor with independent control. The reverberation processor is further segmented into early reflections (with adjustable delay and gain) and late reverberation (with adjustable decay and gain), allowing precise control of each component's contribution to the overall acoustic simulation.
Solution Approach 2:
The patent introduces intermediate processing stages between the input signal and final output, including separate direct and reverberation paths with multiple adjustment points. These intermediary processors enable fine-grained control over reverberation characteristics without requiring complete system redesign, thus improving accuracy while managing complexity.
2Ease of operation
If independent control of reverberation loudness and decay is implemented, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The control interface is segmented into distinct parameters for different reverberation aspects: early reflection delay, early reflection gain, late reverberation decay time, and late reverberation gain. This segmentation allows sound designers to independently adjust each parameter without affecting others, providing intuitive control while maintaining manageable system complexity through modular parameter design.
Data Source
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AI summary
Method, and corresponding system, comprising receiving an input signal including a first portion and a second portion; using a reverberation processing system to apply a reverb initial gain, RIG, value (552) to the first portion of the input signal, apply a reverb initial power, RIP, correction factor (554) to the first portion of the input signal, and introduce reverberation effects (556) in the first portion of the input signal; using a direct processing system to process the second portion of the input signal; combining (562) the first portion of the input signal from the reverberation processing system and the second portion of the input signal from the direct processing system; and outputting the combined first and second portions of the input signal as an output signal, wherein the output signal is the audio signal.