Class PatchSampling

Inheritance
Object
PatchSampling
Inherited Members
Namespace: AudioAnalysisTools.DSP
Assembly: AudioAnalysisTools.dll
Syntax
public static class PatchSampling

Methods

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AddRow(Double[,])

Adding a row of zero/one to 2D array.

Declaration
public static double[, ] AddRow(double[, ] matrix)
Parameters
Type Name Description
Double[,] matrix
Returns
Type Description
Double[,]
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ConcatenateGridOfPatches(List<Double[,]>, Int32, Int32, Int32)

construct the original matrix from a list of sequential patches all vectors in list are of the same length.

Declaration
public static double[, ] ConcatenateGridOfPatches(List<double[, ]> list, int columnSize, int patchWidth, int patchHeight)
Parameters
Type Name Description
List<Double[,]> list
Int32 columnSize
Int32 patchWidth
Int32 patchHeight
Returns
Type Description
Double[,]
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ConcatFreqBandMatrices(List<Double[,]>)

concatenate submatrices column-wise into one matrix, i.e., the number of rows for the output matrix is equal to the number of rows of each of the frequency band matrices.

Declaration
public static double[, ] ConcatFreqBandMatrices(List<double[, ]> submatrices)
Parameters
Type Name Description
List<Double[,]> submatrices
Returns
Type Description
Double[,]
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ConvertPatches(Double[,], Int32, Int32, Int32)

converts a set of patches to a matrix of original size after applying pca. the assumption here is that the input matrix is a sequential non-overlapping patches.

Declaration
public static double[, ] ConvertPatches(double[, ] whitenedPatches, int patchWidth, int patchHeight, int columnSize)
Parameters
Type Name Description
Double[,] whitenedPatches
Int32 patchWidth
Int32 patchHeight
Int32 columnSize
Returns
Type Description
Double[,]
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GetArbitraryFreqBandMatrix(Double[,], Int32, Int32)

outputs a matrix with arbitrary minimum and maximum frequency bins.

Declaration
public static double[, ] GetArbitraryFreqBandMatrix(double[, ] matrix, int minFreqBin, int maxFreqBin)
Parameters
Type Name Description
Double[,] matrix
Int32 minFreqBin
Int32 maxFreqBin
Returns
Type Description
Double[,]
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GetFreqBandMatrices(Double[,], Int32)

converts a spectrogram matrix to submatrices by dividing the column of input matrix to different freq bands with equal size. Output submatrices have same number of rows and same number of columns. numberOfBands as an input parameter indicates how many output bands are needed.

Declaration
public static List<double[, ]> GetFreqBandMatrices(double[, ] matrix, int numberOfBands)
Parameters
Type Name Description
Double[,] matrix
Int32 numberOfBands
Returns
Type Description
List<Double[,]>
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GetPatches(Double[,], Int32, Int32, Int32, PatchSampling.SamplingMethod)

Declaration
public static double[][] GetPatches(double[, ] spectrogram, int patchWidth, int patchHeight, int numberOfPatches, PatchSampling.SamplingMethod samplingMethod)
Parameters
Type Name Description
Double[,] spectrogram
Int32 patchWidth
Int32 patchHeight
Int32 numberOfPatches
PatchSampling.SamplingMethod samplingMethod
Returns
Type Description
Double[][]
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GetSubsegmentsSamples(AudioRecording, Double, Double)

cut audio to subsegments of desired length. return list of subsegments.

Declaration
public static List<AudioRecording> GetSubsegmentsSamples(AudioRecording recording, double subsegmentDurationInSeconds, double frameStep)
Parameters
Type Name Description
AudioRecording recording
Double subsegmentDurationInSeconds
Double frameStep
Returns
Type Description
List<AudioRecording>
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ListOf2DArrayToOne2DArray(List<Double[,]>)

convert a list of patch matrices to one matrix by row patch matrices can have different row numbers but must have the same column number.

Declaration
public static double[, ] ListOf2DArrayToOne2DArray(List<double[, ]> listOfPatchMatrices)
Parameters
Type Name Description
List<Double[,]> listOfPatchMatrices
Returns
Type Description
Double[,]