Wireless Transceiver Voice Activity Detection Power Reduction
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Solution Overview
Problem
Wireless headsets and earpieces consume significant battery power due to continuous transmission of audio data even during silent periods in voice communication, leading to unnecessary power drain and reduced battery life.
Innovation Solution
A wireless transceiver system that includes a microphone, voice detection circuit, and control circuit to detect voice activity and adjust the transmission duty cycle, transmitting audio data at a full cycle when voice is present and null data at a reduced cycle when voice is absent, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the headset continuously transmits audio data to maintain connection quality, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the transmission duty cycle adjustable rather than fixed. The system dynamically switches between full duty cycle (when voice activity is detected) and reduced duty cycle (when silence is detected), allowing the transmission rate to adapt to actual communication needs and resolve the contradiction between maintaining connection quality and reducing power consumption
Solution Approach 2:
The patent changes the transmission parameter (duty cycle) based on voice activity detection. By modifying the transmission frequency from continuous to intermittent based on detected voice presence, the system optimizes the balance between communication reliability and power consumption without compromising connection stability
2Reliability
If the headset transmits audio data during silent periods, then connection maintenance is improved, but energy waste increases
Solution Approach 1:
The patent implements periodic action by transmitting audio data only during specific periods when voice activity is detected, rather than continuously. The system uses voice activity detection to determine transmission timing, resulting in periodic transmissions that maintain connection while avoiding unnecessary energy waste during silent periods
Solution Approach 2:
The patent extracts the unnecessary transmission portion by identifying and excluding silent periods from the transmission schedule. By removing the duty cycle reduction mechanism during silence, the system eliminates energy waste while preserving the full duty cycle transmission during voice activity to maintain connection quality
Data Source
AI summary
A wireless transceiver is provided for transmitting and receiving audio data, comprising: a microphone configured to generate a digital audio signal that includes the audio data, based on a received sound sampled into digital format; a voice detection circuit configured to detect the presence of voice activity in the audio data, and to generate a voice detection signal indicating whether the voice activity is present in the audio data; a transceiver circuit configured to transmit the audio data over a wireless medium; and a control circuit configured to control transmission of the audio data over the wireless medium by the transceiver circuit, based on the voice detection signal. This allows saving of transmission power since no transmission is done during the silence periods. The digital audio signal is at least one of a pulse code modulated signal without compression, and a Bluetooth signal.