Voice Control System Using Mobile Device Intermediary
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Solution Overview
Problem
Current voice control systems face limitations in reliability and comfort due to distance-dependent speech signal quality, requiring fast and accurate localization of moving speakers in complex environments, and lack user customization and activation methods, leading to inefficient and uncomfortable user experiences.
Innovation Solution
A voice control system that utilizes a mobile device to transmit control signals and audio signals to a stationary unit, enabling user presence detection, speech recognition, and microphone array adjustment for improved signal quality, allowing for individual user identification and flexible operation through customizable settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stationary microphone array is used for speech recognition, then the system structure is simple, but the speech signal quality deteriorates with increasing distance between the speaker and the microphone
Solution Approach 1:
The patent introduces a mobile device as an intermediary that carries a microphone close to the speaker's mouth. This mobile device transmits the captured speech signal to the stationary unit, effectively bridging the distance gap and preventing signal quality deterioration without requiring the stationary unit to have microphones physically close to all potential speakers.
2Reliability
If multi-channel systems with adaptive processing are used to improve signal quality, then the speech recognition performance improves, but the signal processing becomes complex and error-prone
Solution Approach 1:
The patent extracts the speech signal capture function from the complex stationary multi-channel system and places it in the simple mobile device. The mobile device's single microphone captures the signal close to the speaker, and this signal is then transmitted to the stationary unit for recognition, bypassing the need for complex adaptive processing in the stationary unit.
3Speed
If the system activates speech recognition continuously, then the response to user commands is fast, but the system consumes more energy and may trigger unintended responses
Solution Approach 1:
The patent uses the mobile device to perform preliminary actions: detecting user presence, identifying the user, and determining the user's spatial position before activating speech recognition. This preliminary preparation ensures that speech recognition is activated at the optimal moment with accurate context, enabling fast response while avoiding unintended activations.
4Measurement precision
If the system localizes speakers in real-time to enable fast speech recognition, then the voice control becomes more accurate, but the processing time and computational requirements increase
Solution Approach 1:
The mobile device acts as an intermediary that provides pre-computed localization information to the stationary unit. The mobile device determines the user's position relative to itself and transmits this information along with the speech signal, eliminating the need for the stationary unit to perform complex real-time speaker localization processing.
Data Source
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AI summary
The present invention relates to a method for voice control of a voice control system comprising a stationary unit for receiving and recognizing a speech signal from at least one user of the voice control system, comprising providing at least one mobile device carried by the at least one user of the voice control system; transmitting a control signal from the at least one mobile device to the stationary unit; receiving the transmitted control signal by the stationary unit and operating the stationary unit in response to the received control signal. The present invention relates to a voice control system, comprising a stationary unit configured to receive a speech signal; at least one mobile device configured to transmit a control signal to the stationary unit and wherein the stationary unit is also configured to receive the control signal transmitted by the at least one mobile device and to operate in response to the received control signal.