Class EnergyThresholdVAD

Adaptive energy threshold voice activity detection (VAD) implementation. It can be used to enable hands-free operation of the SLU decoder.

When enough frames with a signal stronger than SignalToNoiseDb have been detected, IsSignalDetected goes true. When enough silent frames have been detected, IsSignalDetected goes false after the sustain time. Use its public fields to configure the static noise gate level, signal-to-noise level, activation/deactivation treshold (ratio of signal to silent frames) and the signal sustain time. The background noise level gradually adapts when no signal is detected.

IsSignalDetected can be used to drive SpeechlyClient's Start and Stop automatically by setting ControlListening true.

Inheritance

System.Object

EnergyThresholdVAD

Namespace: Speechly.Tools

Assembly: speechly-dotnet.dll

Syntax

public class EnergyThresholdVAD : object

Constructors

EnergyThresholdVAD(VADOptions, AudioInfo)

Declaration

public EnergyThresholdVAD(VADOptions options, AudioInfo output)

Parameters

Type	Name	Description
VADOptions	options
AudioInfo	output

Properties

Options

Declaration

public VADOptions Options { get; }

Property Value

Type	Description
VADOptions

Output

Declaration

public AudioInfo Output { get; }

Property Value

Type	Description
AudioInfo

Methods

ProcessFrame(Single[], Int32, Int32)

Declaration

public void ProcessFrame(float[] floats, int start = 0, int length = null)

Parameters

Type	Name	Description
System.Single[]	floats
System.Int32	start
System.Int32	length

ResetVAD()

Declaration

public void ResetVAD()