SBAA600 October   2024 TAA5212 , TAC5111 , TAC5112 , TAC5211 , TAC5212

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Voice Activity Detection
    1. 2.1 VAD Configurations
      1. 2.1.1 User, Auto, Intermediate
      2. 2.1.2 VAD With ADC Recording
      3. 2.1.3 VAD Monitoring Channel
      4. 2.1.4 VAD Interrupt Pin
      5. 2.1.5 MICBIAS Enable During PDM Monitoring
      6. 2.1.6 VAD Clock Configurabilty
    2. 2.2 VAD Parameters
      1. 2.2.1 Initial Learning Period
      2. 2.2.2 Hold Over Counter
      3. 2.2.3 Wakeup Wait
      4. 2.2.4 Threshold
  6. 3VAD Performance Results
  7. 4Examples
  8. 5Summary
  9. 6References

5 Summary

The Voice Activity Detection (VAD) algorithm is a voice-triggered, system wake-up mechanism that enables a device or system to be in sleep mode, consuming minimal power until voice is detected and recording can take place.

The VAD has 3 modes of operation based on the needs of the system: user mode, automatic mode, and intermediate mode. These modes control how the ADC recording powers up and down based on voice activity.

The VAD feature is supported on all analog-to-digital converter (ADC) channels of the TAx511x and TAx521x device family, including digital microphone channels, with one channel being monitored at a time.