Audio Signal Crosstalk Elimination via Filter Coefficients
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Solution Overview
Problem
In settings with multiple microphones, crosstalk between audio signals from different sources degrades the overall speech output, leading to interference and reduced clarity in systems used for communication during meetings or similar events.
Innovation Solution
A method and system for processing audio signals that determine a target audio signal and a reference audio signal from multiple microphones, using a filter coefficient to eliminate crosstalk by identifying and filtering out interfering signals, thereby improving speech clarity and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple microphones are used to capture audio signals from different positions, then the coverage and capture capability of the system is improved, but crosstalk between audio signals from different sources increases, degrading speech output quality
Solution Approach 1:
The patent extracts and removes the harmful crosstalk component from the mixed audio signal by using signal processing techniques. The system separates the desired audio signal from the interfering crosstalk signal, allowing the beneficial multi-microphone coverage while eliminating the harmful interference through computational methods rather than physical isolation.
Solution Approach 2:
The patent introduces an intermediary signal processing system that acts as a mediator between the multiple microphones and the final audio output. This intermediary processing layer analyzes the signals from multiple microphones, identifies crosstalk components, and generates corrected audio outputs, thereby resolving the contradiction between capture versatility and interference.
2Productivity
If multiple microphones operate in close proximity to capture speech from different speakers, then the system can capture audio from multiple sources, but crosstalk occurs among different audio signals, negatively impacting speech output
Solution Approach 1:
The patent employs feedback mechanisms in the signal processing to continuously monitor and adjust the separation of audio signals. By analyzing the output signals and comparing them with expected patterns, the system dynamically adjusts processing parameters to maintain high speech output quality while capturing audio from multiple sources efficiently.
Solution Approach 2:
The patent replaces the mechanical/physical approach of spatial separation with a computational signal processing approach. Instead of physically positioning microphones far apart to avoid crosstalk, the system uses digital signal processing to separate signals after capture, maintaining close microphone positioning for efficiency while eliminating interference through algorithmic processing.
Data Source
AI summary
The disclosure describes methods, clients, and electronic devices for processing audio signals. One method for processing audio signals comprises: receiving a first audio signal inputted from a first audio acquisition terminal and a second audio signal inputted from a second audio acquisition terminal, wherein the first audio acquisition terminal and the second audio acquisition terminal are located in different positions of a same location; determining a target audio signal and a reference audio signal from the first audio signal and the second audio signal; determining a filter coefficient corresponding to the target audio signal based on the reference audio signal; and eliminating, from the target audio signal, a crosstalk signal determined based on the filter coefficient and the reference audio signal. The effect that a speech path can output speech signals with less interference is achieved.