Auditory Masking Coherence Calibration System
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Solution Overview
Problem
Audio systems face challenges in maintaining high coherence between the input audio signal and the captured audio signal due to environmental noise, which affects sound quality and requires continuous calibration to provide transparent audio reproduction.
Innovation Solution
The technique involves generating an auditory masking pattern based on the frequency spectrum of an audio signal, injecting an inaudible calibration signal to create a combined input signal, and performing calibration operations to maintain high coherence between the combined signal and the captured signal, allowing for effective equalization filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration procedures are implemented to provide transparent audio reproduction, then sound quality is improved, but environmental noise reduces the effectiveness of calibration
Solution Approach 1:
The patent introduces an auditory masking pattern as an intermediary signal that mediates between the calibration signal and the environmental noise. This masking pattern, generated based on the frequency spectrum of the audio signal, allows the calibration system to operate effectively by masking the harmful environmental noise while preserving the coherence measurement between the audio signal and reference point.
Solution Approach 2:
The patent changes the parameters of the calibration signal by generating it based on the auditory masking pattern derived from the audio signal's frequency spectrum. This parameter change allows the calibration signal to adapt to the specific acoustic conditions and maintain effectiveness despite environmental noise variations.
2Reliability
If auditory masking pattern is generated and calibration signal is injected, then coherence between combined signal and captured signal is maintained, but device complexity increases
Solution Approach 1:
The calibration system performs self-service by generating the auditory masking pattern and calibration signal automatically based on the frequency spectrum of the audio signal itself. The system uses the audio signal's own characteristics to create the masking pattern, eliminating the need for external calibration equipment or manual intervention, thereby maintaining reliability without proportionally increasing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures neutral audio reproduction by maintaining high coherence between the input and captured signals, effectively adjusting the audio signal to account for noise and environmental factors, resulting in improved sound quality independently of the audio source material.
Implementation Method 1
generating a first auditory masking pattern based on a frequency spectrum of at least a first frame of a first audio signal, generating a first calibration signal based on the first auditory masking pattern
Data Source
AI summary
A technique for auditory masking for a coherence-controlled calibration system includes generating a first auditory masking pattern based on a frequency spectrum of at least a first frame of a first audio signal. The technique continues by generating a first calibration signal based on the first auditory masking pattern. The technique then includes producing a combined input signal based on the first audio signal and the first calibration signal. The technique also includes performing one or more calibration operations based on the combined input signal.