Voice Verification System Dynamic Power Management
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Solution Overview
Problem
The high power consumption of voice verifying systems in portable electronic devices due to constantly active microphones and verifying modules, which are required to receive and verify voice commands, is a significant issue.
Innovation Solution
A voice verifying system that adjusts the standard for determining the validity of input audio signals and only activates devices when a valid speech signal is detected, using a microphone, speech determining device, verifying module, and reference value generating device, which can be initially turned off or in sleep mode until activated by a valid speech signal, optimizing power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microphone and verifying module are always turned on to receive and verify voice commands, then the voice verifying system can continuously detect and process speech signals, but the power consumption increases significantly
Solution Approach 1:
The patent applies dynamics by making the verifying module's operational state changeable. The verifying module transitions between active and inactive states based on the validity of detected audio signals. When the audio signal is determined to be valid (speech signal), the verifying module activates to process the signal. When the audio signal is invalid, the verifying module remains inactive, thus dynamically adjusting power consumption while maintaining reliable voice detection capability.
Solution Approach 2:
The patent changes the operational parameter (power state) of the verifying module based on the validity parameter of the audio signal. By using the speech signal validity determination as a control parameter, the system adjusts the verifying module's activation state accordingly, optimizing the balance between detection reliability and power consumption.
2Measurement precision
If the verifying module is always active to validate speech signals, then speech recognition accuracy is maintained, but unnecessary power is consumed when no speech is detected
Solution Approach 1:
The patent applies preliminary action by first determining the validity of the audio signal using the microphone and audio signal processing unit before activating the verifying module. This preliminary validation step prevents the verifying module from processing invalid signals, thereby avoiding unnecessary power consumption while ensuring that speech recognition accuracy is maintained for valid speech signals.
Solution Approach 2:
The patent extracts the audio signal validation function from the verifying module and places it in a separate audio signal processing unit that operates independently. This extraction allows the verifying module to be selectively activated only when needed, separating the functions of audio validation and speech verification to optimize power consumption without compromising recognition accuracy.
3Speed
If devices are kept active to respond to voice commands immediately, then response speed is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing a triggered activation model where devices transition between inactive and active states based on detected speech signals. The system periodically checks for valid speech signals through the microphone and audio signal processing unit, and only activates the verifying module and target device when speech is detected, creating a periodic active-inactive cycle that reduces overall power consumption while maintaining rapid response capability when needed.
Data Source
AI summary
A voice verifying system, which comprises: a microphone, which is always turned on to output at least one input audio signal; a speech determining device, for determining if the input audio signal is valid or not according to a reference value, wherein the speech determining device passes the input audio signal if the input audio signal is valid; and a verifying module, for verifying a speech signal generated from the input audio signal and for outputting a device activating signal to activate a target device if the speech signal matches a predetermined rule; and a reference value generating device, for generating the reference value according to speech signal information from the verifying module.