Voice Recognition Device Adaptive Timing Noise Control
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Solution Overview
Problem
Conventional voice recognition devices face challenges in accurately recognizing spoken words due to timing gaps between mouth opening and utterance start, and are influenced by surrounding noise levels, which affect recognition accuracy.
Innovation Solution
A voice recognition device that includes a recognizer to detect mouth movements, a detector to identify surrounding noise, and a controller to adjust voice recognition timing based on both mouth movements and noise levels, thereby optimizing the timing of utterance start and end to minimize the impact of noise on recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If voice recognition is performed using a fixed timing gap adjustment, then the device complexity is reduced, but the voice recognition accuracy deteriorates due to timing misalignment with actual utterance
Solution Approach 1:
The patent applies dynamics by making the timing gap adjustment variable rather than fixed. The controller dynamically adjusts the timing gap based on detected noise levels, transitioning from a static system to an adaptive one that responds to environmental conditions, thereby improving recognition accuracy without excessive complexity increase
Solution Approach 2:
The patent implements feedback by using the noise detection result to adjust the timing gap. The system continuously monitors noise levels and uses this information to modify the timing gap adjustment amount, creating a closed-loop control system that improves voice recognition accuracy through adaptive timing adjustment
2Measurement precision
If the timing gap adjustment amount is increased to account for mouth opening delay, then the voice recognition timing is improved, but the recognition accuracy deteriorates when surrounding noise is present due to extended listening window
Solution Approach 1:
The system dynamically adjusts the timing gap based on noise conditions. In low-noise environments, a larger timing gap is applied to accommodate mouth opening delay. In high-noise environments, the timing gap is reduced to minimize the listening window and exclude more background noise, thus maintaining reliability across different acoustic conditions
Solution Approach 2:
The patent changes the timing gap parameter based on noise level detection. The controller modifies the timing gap adjustment amount as a variable parameter rather than using a fixed value, allowing optimization of the listening window duration to balance timing accuracy and noise rejection under different environmental conditions
Data Source
AI summary
A voice recognition device including: a recognizer which recognizes a movement of a mouth of an utterer; a detector which detects a noise among a sound around the device; and a controller which controls a voice recognition timing based on the movement of the mouth of the utterer recognized by the recognizer and the noise among the sound around the device detected by the detector.