Microphone Array Dynamic Mode Switching for Voice Recognition
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Solution Overview
Problem
Electronic devices equipped with a single microphone suffer from noise contamination in audio data, leading to decreased accuracy in voice recognition.
Innovation Solution
The use of multiple microphones that can be selectively activated based on audio data analysis, employing a method that switches between power-saving and detail recognition modes to optimize voice recognition accuracy and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple microphones are activated continuously, then voice recognition accuracy is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active microphones based on operational conditions. A first microphone operates continuously in a first mode for basic operations, while additional microphones are activated in a second mode when voice recognition accuracy is determined to be insufficient, thereby optimizing the balance between accuracy and power consumption in real-time
Solution Approach 2:
The system changes the operational parameters of the microphone system by switching between different operational modes. In the first mode, only one microphone is active; in the second mode, multiple microphones are activated. This parameter change allows the system to adapt to varying voice recognition requirements while managing power consumption effectively
2Loss of energy
If one microphone is used, then power efficiency is improved, but noise interference increases
Solution Approach 1:
The system dynamically switches between single-microphone and multi-microphone operation based on the determined voice recognition accuracy. When noise interference degrades accuracy below a threshold, the system activates additional microphones to suppress noise, thereby maintaining power efficiency during clear conditions while mitigating noise interference when necessary
3Measurement precision
If multiple microphones are used, then audio data quality is improved, but device complexity increases
Solution Approach 1:
The microphone system is segmented into different operational configurations. The device includes multiple microphones but operates with one microphone as the primary unit for most functions, activating additional microphones only when audio data quality requires enhanced performance. This segmentation allows high audio quality when needed while maintaining simplicity for routine operations
Data Source
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AI summary
An electronic device which includes a plurality of microphones and an audio data processing module is provided. The plurality of microphones is operatively coupled to the electronic device, and the audio data processing module is capable of being implemented with at least one processor. The audio data processing module recognizes a specified command, based on first audio data collected using a portion of the plurality of microphones and executes a function or an application corresponding to second audio data collected using all the plurality of microphones, when the specified command is recognized.