Voice Control Device Low Power Wake-Up via Segmented Detection
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Solution Overview
Problem
Voice control devices in mobile electronic devices face high energy consumption when the voice engine is kept active, making it inconvenient for users and inefficient in terms of power usage.
Innovation Solution
A voice control device comprising a sound receiver, sound converter, voice identifier, and CPU that activates the voice control function using a predetermined voice signal, allowing the CPU to transition from a sleeping state to a working state only when the correct voice signal is detected, thereby minimizing power consumption and enabling easy activation of voice control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the voice engine is kept activated, then voice control is easily accessible, but energy consumption increases
Solution Approach 1:
The voice recognition system is divided into two segments: a lightweight voice identifier that runs continuously in low-power mode to detect wake-up phrases, and a full voice engine that activates only when needed. This segmentation allows the system to maintain ease of voice control activation while significantly reducing energy consumption during idle periods.
Solution Approach 2:
The voice identifier performs preliminary detection of wake-up phrases before activating the full voice engine. This preliminary action filters out unnecessary activations and ensures that the energy-intensive voice engine only runs when a valid wake-up phrase is detected, resolving the contradiction between easy activation and energy consumption.
2Use of energy by moving object
If the voice engine is triggered by button press, then energy consumption is reduced, but ease of use decreases
Solution Approach 1:
The voice identifier acts as an intermediary between the user and the voice engine. It continuously monitors for wake-up phrases in a low-power state and only activates the full voice engine when the predetermined phrase is detected. This intermediary mechanism provides hands-free activation convenience while maintaining low energy consumption during idle periods.
Solution Approach 2:
The system dynamically adjusts its operational state based on input detection. The voice identifier operates in a continuous low-power monitoring mode, and upon detecting the wake-up phrase, dynamically transitions to activating the full voice engine. This dynamic state change resolves the contradiction by providing easy activation when needed while consuming minimal energy during idle periods.
Data Source
AI summary
A voice control device and a corresponding voice control method are provided. The voice control device includes a sound receiver, a sound converter, a voice identifier, and a central processing unit (CPU). The sound receiver receives a first sound signal. The sound converter converts the first sound signal from analog signal to digital signal. The voice identifier identifies a first voice signal from the first sound signal, performs a first comparison on the first voice signal and a second voice signal, and generates a wake-up signal according to the first comparison. When receiving the wake-up signal, the CPU enters a working state from a sleeping state, performs a second comparison on the first voice signal and the second voice signal, and takes over the voice input from the sound receiver and the sound converter according to the second comparison.