Audio Processing Noise Reduction via Reference Section Switching
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Solution Overview
Problem
Existing audio processing apparatuses face challenges in effectively reducing noise when multiple types of noise are generated sequentially, leading to degradation of noise reduction effects.
Innovation Solution
An audio processing apparatus that includes an acquisition unit and an audio processing unit capable of acquiring and reducing noise by complementing audio signals in noisy sections using signals from predetermined noise-free sections before and after the noise, and switching reference sections based on noise presence in adjacent sections to minimize noise contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If noise reduction is performed by using sound in the section immediately before driving a motor, then noise of the motor can be complemented, but another noise may be contained in the noise section resulting in degradation of noise reduction effect
Solution Approach 1:
The system performs preliminary noise detection on both the section before and after the motor driving section, and selects the noise-free section in advance to generate complementary sound. This preliminary action ensures that the complementary sound does not contain noise from other motors, resolving the contradiction between achieving noise reduction and avoiding noise contamination.
Solution Approach 2:
The system uses feedback from noise detection results to dynamically select which section (before or after) to use for generating complementary sound. By continuously monitoring noise levels in both sections and adjusting the selection based on detected noise presence, the system ensures reliable noise reduction without introducing additional noise contamination.
2Object-affected harmful factors
If multiple types of noise are generated sequentially, then noise from one motor may be contained in the complementing sound for another motor, but using only noise-free sections reduces the available signal for complementation
Solution Approach 1:
The system dynamically adapts its noise reduction approach based on the detected noise conditions. When sequential noise from multiple motors is detected, the system switches between using the section before or after the target motor, selecting the optimal noise-free section in real-time. This dynamic adaptation maintains audio signal quality while preventing noise contamination.
Solution Approach 2:
The system changes the parameter of which section to use (before or after) based on noise detection results. By adjusting this selection parameter dynamically, the system optimizes the balance between avoiding noise contamination and preserving sufficient audio signal for effective complementation.
Data Source
AI summary
An audio processing apparatus includes an acquisition unit configured to acquire an audio signal, and an audio processing unit configured to reduce noise contained in the audio signal, wherein the audio processing unit complements an audio signal in a section containing noise of the audio signal with a signal generated based on an audio signal in a predetermined section before the section containing noise and an audio signal in a predetermined section after the section containing noise, and wherein, in a case where noise is contained in one of the audio signal in the predetermined section before the section containing noise and the audio signal in the predetermined section after the section containing noise, the audio processing unit complements the audio signal in the section containing noise with a signal generated based on the audio signal in a noise-free section.