Class TimeStretch<T>

Namespace

AiDotNet.Augmentation.Audio

Assembly

AiDotNet.dll

Stretches or compresses audio in time without changing pitch.

public class TimeStretch<T> : AudioAugmenterBase<T>, IAugmentation<T, Tensor<T>>

Type Parameters

T

The numeric type for calculations.

Inheritance

object

AugmentationBase<T, Tensor<T>>

AudioAugmenterBase<T>

TimeStretch<T>

Implements

IAugmentation<T, Tensor<T>>

Inherited Members

AudioAugmenterBase<T>.SampleRate

AudioAugmenterBase<T>.GetDuration(Tensor<T>)

AudioAugmenterBase<T>.GetSampleCount(Tensor<T>)

AugmentationBase<T, Tensor<T>>.NumOps

AugmentationBase<T, Tensor<T>>.OnAugmentationApplied

AugmentationBase<T, Tensor<T>>.Name

AugmentationBase<T, Tensor<T>>.Probability

AugmentationBase<T, Tensor<T>>.IsTrainingOnly

AugmentationBase<T, Tensor<T>>.IsEnabled

AugmentationBase<T, Tensor<T>>.Apply(Tensor<T>, AugmentationContext<T>)

AugmentationBase<T, Tensor<T>>.ApplyAugmentation(Tensor<T>, AugmentationContext<T>)

AugmentationBase<T, Tensor<T>>.GetParameters()

AugmentationBase<T, Tensor<T>>.RaiseAugmentationApplied(AugmentationContext<T>, bool)

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

For Beginners: Time stretching makes audio faster or slower without changing the pitch - like how a slower speaker still has the same voice pitch. This is different from simply playing at a different speed.

When to use:

• Speech recognition to handle different speaking speeds
• Music tempo adjustment
• Synchronizing audio with video

Constructors

TimeStretch(double, double, double, int)

Creates a new time stretch augmentation.

public TimeStretch(double minRate = 0.8, double maxRate = 1.2, double probability = 0.5, int sampleRate = 16000)

Parameters

minRate double

Minimum stretch rate (default: 0.8).

maxRate double

Maximum stretch rate (default: 1.2).

probability double

Probability of applying this augmentation (default: 0.5).

sampleRate int

Sample rate of the audio in Hz (default: 16000).

Properties

MaxRate

Gets the maximum time stretch factor.

public double MaxRate { get; }

Property Value

double

Remarks

Default: 1.2 (20% slower)

Values greater than 1.0 slow down the audio.

MinRate

Gets the minimum time stretch factor.

public double MinRate { get; }

Property Value

double

Remarks

Default: 0.8 (20% faster)

Values less than 1.0 speed up the audio.

Methods

ApplyAugmentation(Tensor<T>, AugmentationContext<T>)

Implement this method to perform the actual augmentation.

protected override Tensor<T> ApplyAugmentation(Tensor<T> data, AugmentationContext<T> context)

Parameters

data Tensor<T>

The input data.

context AugmentationContext<T>

The augmentation context.

Returns

Tensor<T>

The augmented data.

GetParameters()

Gets the parameters of this augmentation.

public override IDictionary<string, object> GetParameters()

Returns

IDictionary<string, object>

A dictionary of parameter names to values.