Vehicle Voice Recognition Using Seat-Aware Microphone Selection
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Solution Overview
Problem
The increased number of microphones required for accurate voice recognition in vehicles leads to higher costs, and existing systems struggle to efficiently identify the speaker's location for effective voice command control.
Innovation Solution
A vehicle system with a microphone array and sensors to determine the speaker's location using a contact area and weight sensors, selecting appropriate microphones as main and auxiliary based on the speaker's position, and employing noise reduction techniques to accurately recognize voice commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If microphones for each seat are mounted to accurately recognize speeches of occupants, then voice recognition accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The system segments the microphone functions by designating one microphone as a main microphone and another as an auxiliary microphone, with each serving specific purposes. The main microphone captures voice commands while the auxiliary microphone captures noise, allowing accurate voice recognition without requiring microphones at every seat location.
Solution Approach 2:
The auxiliary microphone acts as an intermediary element that captures noise signals which are then used to remove corresponding noise from the main audio data. This intermediary approach enables noise reduction without requiring additional microphones at each seat, thereby maintaining voice recognition accuracy while reducing manufacturing costs.
2Measurement precision
If multiple microphones are used for noise reduction, then voice command recognition accuracy is improved, but device complexity increases
Solution Approach 1:
The system divides the microphone array into specific functional roles: one microphone is designated as the main microphone for capturing voice commands, while another is designated as the auxiliary microphone for capturing noise. This segmentation simplifies the overall system complexity by assigning clear, distinct functions to each microphone rather than requiring complex coordination of multiple microphones.
Solution Approach 2:
The system extracts the noise signal from the auxiliary microphone and removes it from the main audio data. This extraction approach simplifies the noise reduction process by separating noise capture from voice capture, allowing effective noise reduction without requiring a complex multi-microphone system.
Data Source
AI summary
A vehicle may accurately recognize a voice command of a speaker by identifying the speaker who desires to use a voice recognition function. In particular, the vehicle includes: a microphone array including a first microphone and a second microphone; a button configured to activate a voice recognition system; a sensor configured to detect a contact area of a finger pressing the button. The voice recognition system is configured to: determine a location of a speaker who presses the button based on the contact area; select the first microphone and the second microphone as a main microphone and an auxiliary microphone, respectively, based on a determination that the speaker is located in a first seat; and select the second microphone and the first microphone as the main microphone and the auxiliary microphone, respectively, based on a determination that the speaker is located in a second seat.