Audio Reverberation Processing for Acoustic Space Simulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing audio processing systems struggle to accurately replicate or modify the acoustic characteristics of an acoustic space without direct measurement of the space's impulse response, leading to suboptimal sound reproduction and intelligibility.
Innovation Solution
An audio signal processing system that decomposes audio signals into dry and reverberation components using an estimated impulse response, allowing for the generation of modified or artificial reverberation components to adjust the acoustic characteristics of a space, enabling dynamic control of reverberation and equalization to match target conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct measurement of acoustic space impulse response is performed, then accuracy of acoustic characteristic replication is improved, but ease of operation deteriorates due to difficulty of accessing and measuring the acoustic space
Solution Approach 1:
The patent extracts reverberation characteristics from the audio signal itself and creates a virtual acoustic space model, copying the essential acoustic properties without requiring physical measurement of the target acoustic space. This allows accurate replication of acoustic characteristics while avoiding the operational difficulties of direct measurement.
Solution Approach 2:
The patent uses the audio signal as an intermediary to derive acoustic characteristics. Instead of directly measuring the acoustic space, the system extracts impulse response information from the relationship between dry and reverberant components of the audio signal, serving as a mediator between the sound source and the acoustic environment.
2Adaptability or versatility
If decomposition of audio signal into dry and reverberation components is performed, then ability to modify acoustic characteristics is improved, but device complexity increases
Solution Approach 1:
The patent segments the audio signal into dry and reverberation components, allowing independent processing and modification of each part. This segmentation enables flexible acoustic characteristic modification while using simple processing operations that do not significantly increase device complexity.
Solution Approach 2:
The patent modifies acoustic characteristics by changing parameters of the reverberation component, such as impulse response characteristics and reverberation level. These parameter changes are achieved through straightforward signal processing operations that maintain device simplicity while providing high adaptability.
3Reliability
If reverberation component is extracted and modified, then speech intelligibility is improved, but loss of information increases due to separation of dry and reverberant components
Solution Approach 1:
The patent extracts the reverberation component from the audio signal to separately process and optimize it for speech intelligibility. By taking out the reverberation characteristics, the system can enhance speech clarity while preserving essential acoustic information through careful reconstruction of the modified signal.
Solution Approach 2:
The system uses feedback from the extracted reverberation characteristics to guide the modification process, ensuring that changes improve speech intelligibility while maintaining the natural acoustic properties of the original signal. This feedback mechanism prevents excessive information loss during processing.
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
This system effectively modifies the perceived acoustic characteristics of a space, improving sound reproduction and intelligibility without requiring precise measurement of the acoustic space, allowing for simulation of desired acoustic environments.
Implementation Method 1
The reverberation generator module is configured to combine the dry audio signal component with a modified reverberation component or an artificial reverberation component
Data Source
AI summary
An audio signal processing system is configured to separate an audio signal into a dry signal component and one or more reverberant signal components. The dry signal component and the reverberant signal components can be separately modified and then recombined to form a processed audio signal. Alternatively, the dry signal component may be combined with an artificial reverberation component to form the processed audio signal. Modification of the reverberation signal component and generation of the artificial reverberation component may be performed in order to modify the acoustic characteristics of an acoustic space in which the audio signal is driving loudspeakers. The audio signal may be a pre-recorded audio signal or a live audio signal generated inside or outside the acoustic space.