Speech

Voice activity detection (VAD) libraries 2023

Voice activity detection (VAD) libraries 2023
  1. What is VAD in speech recognition?
  2. How does Webrtc VAD work?

What is VAD in speech recognition?

6.1 Introduction. Voice activity detection (VAD) is a technique in which the presence or absence of human speech is detected. The detection can be used to trigger a process. VAD has been applied in speech-controlled applications and devices like smartphones, which can be operated by using speech commands.

How does Webrtc VAD work?

Webrtc splits audio into frames, each frame has corresponding number (0 or 1). We use 30ms frames for webrtc, so each 250 ms chunk is split into 8 frames, their mean value is used as a treshold for plot.

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