Audio Controller Dynamic Howling Reduction
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Solution Overview
Problem
Existing audio signal processing systems face challenges in achieving effective noise cancellation, particularly howling reduction, as they often rely on simple signal characteristic control methods that are not adequately suited to varying ambient sound situations, leading to suboptimal results and potential malfunctions.
Innovation Solution
A controller that selectively executes multiple audio signal characteristic control methods based on analysis of ambient sounds, switching between different control algorithms to address howling reduction depending on the ambient noise level, using thresholds and noise determination criteria to determine the appropriate method for each situation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single audio signal characteristic control method is used for all ambient sound situations, then the device complexity is reduced, but the reliability of howling reduction deteriorates
Solution Approach 1:
The patent implements dynamic switching between multiple control methods (first and second control methods) based on ambient sound analysis results. The controller dynamically selects which control method to execute depending on the analyzed ambient sound characteristics, making the system adaptable rather than static. This resolves the contradiction by allowing the system to maintain high reliability across varying conditions without requiring a single overly complex control method to handle all scenarios.
Solution Approach 2:
The patent changes the control parameter from a fixed single control method to a selectable set of control methods based on ambient sound parameters. By analyzing ambient sound characteristics and switching control methods accordingly, the system optimizes howling reduction effectiveness for different sound environments. This parameter change approach allows the system to maintain reliability without permanently increasing device complexity, as the complexity is managed through conditional logic rather than permanent structural additions.
2Measurement precision
If signal characteristics are simply switched based on ambient sound analysis, then the control ease is improved, but the measurement precision of ambient sound situations deteriorates
Solution Approach 1:
The patent segments the control system into distinct control methods (first control method and second control method) that can be selectively executed based on ambient sound analysis. Each control method is optimized for specific ambient sound conditions, allowing precise measurement and response to different sound situations. This segmentation enables the system to achieve high measurement precision by analyzing ambient sounds and selecting the appropriate control method, while keeping individual control methods relatively simple rather than requiring one overly complex universal controller.
3Adaptability or versatility
If multiple control methods are provided for different purposes, then the adaptability to ambient sound situations is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic switching between multiple control methods based on real-time ambient sound analysis. The controller adapts to different ambient sound situations by selecting the appropriate control method (first or second) according to the analyzed sound characteristics. This dynamic approach provides high adaptability to varying ambient conditions without requiring all control methods to be simultaneously active, thereby managing device complexity through conditional execution rather than permanent multi-method integration.
Data Source
AI summary
Appropriate control corresponding to an ambient sound situation is executed for an audio processing system which receives an input of a sound via a microphone and outputs the sound via a speaker. For this purpose, a controller for the audio processing system which receives an input of a sound via the microphone and outputs the sound from the speaker includes a characteristic control unit and an analysis unit. The characteristic control unit is capable of selectively executing a plurality of control methods as an audio signal characteristic control method. The analysis unit analyzes the sound input via the microphone, and selects a control method executed by the characteristic control unit for the audio processing system in accordance with an analysis result.