Voice-Controlled Electronic Apparatus Placement Using Reverberation Time
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Solution Overview
Problem
Existing electronic apparatuses face challenges in accurately recognizing user voice commands due to varying voice quality and location-specific factors such as distance, complex structures, and obstacles, leading to low recognition rates and user dissatisfaction.
Innovation Solution
The electronic apparatus identifies a target location for receiving user voice by considering the reverberation time of an audio signal, using a processor to analyze map data, output audio signals, and determine the location with the longest reverberation time, while also taking into account additional information such as power-supplyable locations and candidate projection surface locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electronic apparatus is placed at an arbitrary location specified by the user, then the user can easily place the device, but the voice recognition rate may be low due to unfavorable acoustic conditions
Solution Approach 1:
The system performs preliminary acoustic measurement by outputting a test audio signal and measuring the reverberation time at the placement location before finalizing the device position. This preliminary action allows the system to evaluate whether the location is acoustically suitable, and if not, guide the user to adjust the placement to a more suitable location, thereby ensuring high voice recognition rate while maintaining ease of placement.
2Adaptability or versatility
If the electronic apparatus is placed in a location with complex structure or many obstacles, then the device can be placed in various positions, but the voice recognition rate decreases due to poor acoustic conditions
Solution Approach 1:
The system evaluates the acoustic quality of each specific placement location by measuring the reverberation time of the test audio signal at that location. Instead of treating all locations equally, it identifies locations with favorable acoustic conditions (appropriate reverberation time) and guides the user to place the device at those specific locations, thereby maintaining placement flexibility while ensuring high voice recognition rate.
3Duration of action of stationary object
If the electronic apparatus stands by at the charging location for a long time, then the device remains ready for use, but the user voice may not be accurately recognized due to poor acoustic conditions at the charging location
Solution Approach 1:
Before the device enters long-term standby at the charging location, the system performs preliminary acoustic measurement by outputting a test audio signal and measuring the reverberation time. If the charging location has poor acoustic conditions (inappropriate reverberation time), the system guides the user to move the device to a more suitable location before standby, ensuring that the device can accurately recognize user voice commands during the extended standby period.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the recognition rate of user voice commands by identifying optimal locations within a space where the audio signal is best received, thereby improving user satisfaction and the accuracy of voice-controlled functions.
Implementation Method 1
acquire a reverberation time of the audio signal at a plurality of locations including the representative location in the candidate region based on a recorded audio signal corresponding to the audio signal acquired through the microphone
Data Source
AI summary
An electronic apparatus including: a speaker; a microphone; and at least one processor, wherein the at least one processor is configured to identify a candidate region having a critical area or more area than the critical area in map data related to a space where the electronic apparatus is located, move the electronic apparatus to a representative location of the candidate region and output an audio signal through the speaker, acquire a reverberation time of the audio signal at a plurality of locations including the representative location in the candidate region based on a recorded audio signal corresponding to the audio signal and acquired through the microphone, and identify, as a target location, a location from which a longest reverberation time is acquired among the plurality of locations.