Audio Feedback Elimination via Virtual Matrix Segmentation
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Solution Overview
Problem
Existing audio systems face challenges in effectively eliminating feedback between audio inputs and outputs without compromising sound quality, as current methods often result in audio loss and reduced sound quality across all outputs when feedback is detected.
Innovation Solution
The implementation of digital signal processing between audio inputs and outputs, utilizing a virtual matrix with virtual channels and cross-points, allows for discrete attenuation or elimination of feedback signals between specific audio inputs and outputs while maintaining audio signals to unaffected outputs, and applying gains to compensate for any loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital signal processing is implemented to eliminate feedback between specific audio inputs and outputs, then feedback elimination effectiveness is improved, but device complexity increases due to virtual matrix and discrete routing requirements
Solution Approach 1:
The audio signal routing is segmented into discrete virtual channels within a virtual matrix, allowing individual control of signal paths between specific audio inputs and outputs. This segmentation enables targeted feedback elimination on affected paths while preserving audio signals on unaffected paths, resolving the contradiction by making the system complex only where necessary rather than uniformly across all signal paths.
Solution Approach 2:
The system applies local quality by treating each virtual channel independently, allowing different signal processing operations (attenuation, elimination, or preservation) to be applied to different audio paths based on where feedback is detected. This localized approach improves feedback elimination effectiveness while minimizing the overall complexity impact by only activating processing where needed.
2Reliability
If audio signal is attenuated or eliminated to stop feedback between specific audio input and output, then feedback is reduced, but sound quality is worsened due to audio loss
Solution Approach 1:
The system applies different quality levels locally to different output channels: affected channels receive attenuation or elimination to stop feedback, while unaffected channels maintain full audio quality. This local differentiation resolves the contradiction by preserving sound quality where feedback is not present while effectively eliminating feedback where it occurs.
Solution Approach 2:
The system dynamically changes signal parameters (gain levels) based on feedback detection results. When feedback is detected between a specific audio input and output, the gain for that particular path is reduced or eliminated, while gains for other paths remain unchanged. This parameter adjustment resolves the contradiction by applying feedback elimination only where necessary, preserving sound quality elsewhere.
3Object-affected harmful factors
If audio signal between first audio input and first audio output is attenuated to eliminate feedback, then feedback is eliminated, but audio signal loss occurs affecting sound quality
Solution Approach 1:
The audio signal distribution is segmented into separate virtual channels, allowing the system to attenuate or eliminate the signal only on the specific path causing feedback while preserving the signal on other paths. This segmentation minimizes audio signal loss by confining attenuation to only the affected feedback path rather than reducing all audio signals system-wide.
Solution Approach 2:
The system selectively discards (attenuates or eliminates) the audio signal only on paths where feedback is detected, while recovering and maintaining full signal levels on unaffected paths. This selective discarding approach resolves the contradiction by minimizing overall audio signal loss while still effectively eliminating feedback on problematic paths.
Data Source
AI summary
An audio system and method for eliminating audio feedback including a first audio input arranged to receive a first audio signal, a first audio output arranged within a first predefined zone, the first audio output arranged to receive the first audio signal, a second audio output arranged within the first predefined zone, the second audio output arranged to receive the first audio signal, and one or more processors connected to a virtual matrix including a plurality of virtual channels connecting the first audio input, the first audio output, and the second audio output, and the one or more processors arranged to receive the first audio signal and attenuate or eliminate the first audio signal to the first audio output or the second audio output if an audio feedback is detected.