Voice Interaction Recording Gain Calibration for Wakeup Accuracy
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Solution Overview
Problem
Existing voice interaction apparatuses with different acoustic hardware architectures struggle to generate consistent recording volumes, affecting the accuracy of nearby wakeup mechanisms based on energy or signal-to-noise ratios.
Innovation Solution
A method and device for controlling recording volume by determining adjustment gains based on microphone sensitivities and analog-to-digital conversion quantified reference voltages to calibrate voice interaction apparatuses, ensuring they produce the same recording volume under the same sound pressure level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different acoustic hardware architectures are used in voice interaction apparatuses, then device functionality and adaptability are improved, but recording volume consistency deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the gain parameter in the signal processing chain to compensate for hardware differences. Specifically, it calculates and applies different gain values to signals from microphones with different sensitivities, thereby standardizing the output recording volume across diverse acoustic hardware architectures while maintaining adaptability.
2Adaptability or versatility
If microphone sensitivity varies across apparatuses, then adaptability to different hardware configurations is improved, but measurement precision of recording volume deteriorates
Solution Approach 1:
The patent implements feedback by measuring the actual sensitivity of each microphone and using this information to calculate appropriate gain compensation values. The system continuously monitors and adjusts the signal processing parameters based on the measured microphone characteristics, ensuring accurate recording volume measurement despite hardware variations.
Solution Approach 2:
The patent changes the gain parameter dynamically based on microphone sensitivity measurements. By calculating the ratio between reference sensitivity and actual sensitivity, the system adjusts the gain to compensate for hardware differences, thereby maintaining measurement precision across varied hardware configurations.
3Manufacturing precision
If gain adjustment based on sensitivity ratios is applied, then recording volume consistency is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the sensitivity ratios for different microphone types before actual voice interaction occurs. During operation, the system simply retrieves and applies the pre-computed gain values, avoiding complex real-time calculations and reducing processing complexity while maintaining recording volume consistency.
4Measurement precision
If calibration using reference apparatus is implemented, then measurement precision of recording volume is improved, but time consumption increases
Solution Approach 1:
The patent performs calibration in advance during the manufacturing or setup phase, establishing reference sensitivity values before the apparatus enters normal operation. This preliminary calibration eliminates the need for time-consuming calibration procedures during actual voice interactions, thus improving measurement precision without significantly impacting operational time.
Data Source
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AI summary
Provided are a method and device for controlling a recording volume, and a storage medium. The method for controlling a recording volume includes: determining an adjustment gain; and calibrating at least one voice interaction apparatus based on the adjustment gain to make the at least one voice interaction apparatus have a same recording volume under a same sound pressure level. The method for controlling a recording volume guarantees accurate running of a nearby wakeup mechanism based on energy or a signal-to-noise ratio.