Audio Signal Processing Device Treble Interference Reduction
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Solution Overview
Problem
Existing audio signal processing technologies fail to effectively address interference in high audio frequencies caused by transmission channel interference, as they either overly attenuate treble frequencies or neglect the actual usage of treble in the signal.
Innovation Solution
An audio signal processing device with a treble detecting block and a filter block that analyzes the treble level and selectively attenuates frequencies above 10 kHz only if the treble level is below a certain threshold, ensuring minimal impact on the signal when treble is heavily used and maximum attenuation when it is not.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high frequencies are reduced to remove interference effects, then listening comfort is improved, but audio quality deteriorates due to loss of treble content
Solution Approach 1:
The filter block dynamically adjusts its attenuation characteristics based on the detected treble level. When treble is present, the filter applies minimal attenuation to preserve audio quality. When treble is absent, the filter increases attenuation to remove interference effects. This dynamic adaptation resolves the contradiction by making the filtering behavior contingent on the actual signal content.
Solution Approach 2:
The system changes the attenuation parameter of the filter based on the detected treble level. The treble detecting block measures the energy in the treble range, and this measurement controls the filter's attenuation coefficient. This parameter change allows the system to adapt between preserving treble (when present) and removing interference (when treble is absent).
2Object-affected harmful factors
If treble attenuation is applied to remove interference, then high frequency interference is reduced, but signal fidelity deteriorates when treble is actually used
Solution Approach 1:
The treble detecting block provides feedback about the presence and level of treble content to the filter block. This feedback loop allows the filter to adjust its attenuation in real-time based on the actual signal content. When feedback indicates treble is present, attenuation is reduced to prevent information loss. When feedback indicates treble is absent, attenuation is increased to remove interference.
Solution Approach 2:
The filter's attenuation characteristic is made dynamic rather than static. It continuously adapts its behavior based on the detected treble level, switching between preservation mode (when treble is present) and interference removal mode (when treble is absent). This dynamic behavior prevents both information loss and interference artifacts.
3Object-affected harmful factors
If brutal attenuation of high frequencies is applied, then interference effects are removed, but audio rendering quality deteriorates
Solution Approach 1:
Instead of applying a fixed brutal attenuation, the system changes the attenuation parameter dynamically based on the detected treble level. The attenuation coefficient varies continuously from minimal (when treble is present) to maximal (when treble is absent). This parameter adaptation ensures that interference removal is applied only when necessary, preserving audio rendering quality.
Solution Approach 2:
The system applies partial attenuation (minimal or zero) when treble is present, and excessive attenuation (maximal) only when treble is absent. This selective application of attenuation avoids the need for consistently brutal filtering, thereby preserving audio quality while still removing interference when appropriate.
Data Source
AI summary
Disclosed is a device (1) for processing an initial audio signal (4), including: a treble detecting block (2) capable of analyzing the initial audio signal to determine a treble level; and a filter block (3) capable of attenuating the initial audio signal in the treble, if the treble level is less than a maximum threshold.