Selective Audio Suppression for Mixed ROI Signal Clarity
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Solution Overview
Problem
Existing audio processing methods improperly reduce the dynamic range of audio signals by suppressing non-Region Of Interest (non-ROI) audio for extended periods and fail to differentiate between ROI and non-ROI audio when they are mixed.
Innovation Solution
An audio signal processing method and device that detects the presence of second type audio and selectively suppresses the volume of first type audio while maintaining the volume of the second type audio, with the option to separate mixed audio into ROI and non-ROI components before suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If non-ROI audio is suppressed to play ROI audio clearly, then the clarity of ROI audio is improved, but the dynamic range of the audio signal is improperly reduced
Solution Approach 1:
The patent segments the audio signal into ROI audio and non-ROI audio components, then applies different processing strategies to each. By detecting the presence of ROI audio and selectively suppressing only non-ROI audio during relevant time intervals, the system maintains clarity of important audio elements while preserving the dynamic range through precise temporal segmentation of suppression actions.
Solution Approach 2:
The patent implements dynamic volume suppression that adapts to the temporal characteristics of audio signals. The suppression is activated only when ROI audio is detected and deactivates when ROI audio is absent, creating a dynamic system that adjusts suppression behavior based on real-time audio content analysis, thereby avoiding unnecessary suppression that would reduce dynamic range.
2Measurement precision
If non-ROI audio is suppressed for extended periods, then the clarity of ROI audio is improved, but the audio signal loses temporal accuracy
Solution Approach 1:
The patent performs preliminary detection of ROI audio presence before applying suppression. By detecting whether ROI audio exists in the current time interval, the system prepares the suppression action only when necessary, avoiding premature or excessive suppression that would cause temporal inaccuracies and loss of audio information.
Solution Approach 2:
The patent implements periodic suppression actions that are activated only during specific time intervals when ROI audio is detected. This periodic activation pattern ensures that suppression is applied only when needed, maintaining temporal accuracy by avoiding continuous suppression that would distort the timing and duration of audio events.
3Device complexity
If ROI audio and non-ROI audio are mixed, then the audio signal is simplified, but the system cannot differentiate between the two types
Solution Approach 1:
The patent applies segmentation to separate mixed audio signals into ROI and non-ROI components through spectral analysis and temporal pattern recognition. By detecting the characteristic frequency spectra and time-domain patterns of different audio types, the system successfully differentiates between mixed components, enabling selective suppression of non-ROI audio while preserving ROI audio clarity.
Data Source
AI summary
An audio signal processing method applied to an audio signal comprising a first type audio. The audio signal processing method comprises: (a) detecting whether the audio signal comprises second type audio or not; and (b) suppressing a volume of the first type audio but not suppressing a volume of the second type audio when the audio signal comprises the second type audio. An audio signal processing device which can perform the audio signal processing device is also disclosed.