Audio Calibration Unit Adaptive Pilot Tone Monitoring
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Solution Overview
Problem
Existing audio systems face challenges in maintaining optimal pilot tone monitoring, as fixed frequency and level settings can lead to pilot tone being audible and impairing audio quality, especially in systems with varying gains and frequency responses.
Innovation Solution
An adaptive calibration unit that adjusts the pilot tone frequency and level dynamically, ensuring the tone is inaudible and optimally set for the specific audio system configuration, using a calibration module to automatically optimize pilot tone monitoring parameters based on detector signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pilot tone frequency and level are set to fixed values, then the monitoring function is simple to implement, but the pilot tone may become audible and impair audio quality in systems with varying gains and frequency responses
Solution Approach 1:
The patent implements dynamic adjustment of pilot tone frequency and level parameters based on system characteristics. The system automatically adapts the pilot tone settings to match the specific audio system configuration, preventing the tone from becoming audible while maintaining monitoring effectiveness. This resolves the contradiction by making the previously fixed parameters dynamic and adaptive.
Solution Approach 2:
The patent changes the physical parameters of the pilot tone (frequency and level) based on system measurements and characteristics. By automatically adjusting these parameters rather than using fixed values, the system maintains optimal monitoring performance without degrading audio quality across different system configurations.
2Reliability
If the pilot tone level is increased to ensure reliable detection, then the monitoring reliability improves, but the pilot tone becomes more audible and impacts audio quality
Solution Approach 1:
The patent dynamically adjusts the pilot tone level parameter based on system characteristics and detection requirements. Rather than using a fixed high level that ensures detection but causes audibility, the system automatically optimizes the level to the minimum required for reliable detection in each specific configuration, thereby maintaining reliability while minimizing audio quality impact.
Solution Approach 2:
The system performs self-adjustment of the pilot tone level based on its own operational requirements and system characteristics. Through automatic calibration and adaptation, the system determines the optimal level without external intervention, ensuring reliable detection while minimizing harmful effects on audio quality.
3Adaptability or versatility
If manual adjustment of pilot tone parameters is performed, then the system can be adapted to specific configurations, but time-consuming calibration and potential for human error occur
Solution Approach 1:
The patent implements automatic parameter adjustment where the system calibrates and adapts the pilot tone settings itself without requiring manual intervention. The system automatically measures system characteristics and adjusts frequency and level parameters accordingly, eliminating time-consuming manual calibration while maintaining full adaptability to different configurations.
Solution Approach 2:
The system uses feedback from system measurements to automatically adjust pilot tone parameters. By continuously monitoring system characteristics and using this information to adapt the pilot tone settings, the system achieves configuration-specific optimization without manual calibration, reducing time loss while maintaining adaptability.
Data Source
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AI summary
The invention relates to a calibration unit (20) for an audio system (2) having a generator (4) for generating a pilot tone (6), and a detector (16a-c) for the pilot tone (6), wherein at least one parameter (P1, 2) determining the pilot tone (6) is changeable, which calibration unit comprises an input unit (22) for optionally setting the parameter (P1, 2), wherein for at least one value (W1, 2) of the parameter (P1, 2), all detectors indicate a detection of the pilot tone (6). An audio system (2) comprises said calibration unit (20). In a method for operating the calibration unit (20), the parameters (p1, 2) is regulated in such a way that all detectors (16a-c) indicate a detection of the pilot tone (6). A computer program carries out all steps of the method, when the program is performed on a computer and/or the calibration unit (20) or the audio system (2).