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TriangularBands extends BaseAlgorithm
in package

TriangularBands

Inputs:

[vector_real] spectrum - the input spectrum (must be greater than size one)

Outputs:

[vector_real] bands - the energy in each band

Parameters:

frequencyBands: vector_real (default = [21.533203125, 43.06640625, 64.599609375, 86.1328125, 107.666015625, 129.19921875, 150.732421875, 172.265625, 193.798828125, 215.33203125, 236.865234375, 258.3984375, 279.931640625, 301.46484375, 322.998046875, 344.53125, 366.064453125, 387.59765625, 409.130859375, 430.6640625, 452.197265625, 473.73046875, 495.263671875, 516.796875, 538.330078125, 559.86328125, 581.396484375, 602.9296875, 624.462890625, 645.99609375, 667.529296875, 689.0625, 710.595703125, 732.12890625, 753.662109375, 775.1953125, 796.728515625, 839.794921875, 861.328125, 882.861328125, 904.39453125, 925.927734375, 968.994140625, 990.52734375, 1012.06054688, 1055.12695312, 1076.66015625, 1098.19335938, 1141.25976562, 1184.32617188, 1205.859375, 1248.92578125, 1270.45898438, 1313.52539062, 1356.59179688, 1399.65820312, 1442.72460938, 1485.79101562, 1528.85742188, 1571.92382812, 1614.99023438, 1658.05664062, 1701.12304688, 1765.72265625, 1808.7890625, 1873.38867188, 1916.45507812, 1981.0546875, 2024.12109375, 2088.72070312, 2153.3203125, 2217.91992188, 2282.51953125, 2347.11914062, 2411.71875, 2497.8515625, 2562.45117188, 2627.05078125, 2713.18359375, 2799.31640625, 2885.44921875, 2950.04882812, 3036.18164062, 3143.84765625, 3229.98046875, 3316.11328125, 3423.77929688, 3509.91210938, 3617.578125, 3725.24414062, 3832.91015625, 3940.57617188, 4069.77539062, 4177.44140625, 4306.640625, 4435.83984375, 4565.0390625, 4694.23828125, 4844.97070312, 4974.16992188, 5124.90234375, 5275.63476562, 5426.3671875, 5577.09960938, 5749.36523438, 5921.63085938, 6093.89648438, 6266.16210938, 6459.9609375, 6653.75976562, 6847.55859375, 7041.35742188, 7256.68945312, 7450.48828125, 7687.35351562, 7902.68554688, 8139.55078125, 8376.41601562, 8613.28125, 8871.6796875, 9130.078125, 9388.4765625, 9668.40820312, 9948.33984375, 10249.8046875, 10551.2695312, 10852.734375, 11175.7324219, 11498.7304688, 11843.2617188, 12187.7929688, 12553.8574219, 12919.921875, 13285.9863281, 13673.5839844, 14082.7148438, 14491.8457031, 14922.5097656, 15353.1738281, 15805.3710938, 16257.5683594]) list of frequency ranges into which the spectrum is divided (these must be in ascending order and connot contain duplicates),each triangle is build as x(i-1)=0, x(i)=1, x(i+1)=0 over i, the resulting number of bands is size of input array - 2

inputSize: integer ∈ (1,inf) (default = 1025) the size of the spectrum

log: bool ∈ {true,false} (default = true) compute log-energies (log2 (1 + energy))

normalize: string ∈ {unit_sum,unit_tri,unit_max} (default = "unit_sum") spectrum bin weights to use for each triangular band: 'unit_max' to make each triangle vertex equal to 1, 'unit_sum' to make each triangle area equal to 1 summing the actual weights of spectrum bins, 'unit_area' to make each triangle area equal to 1 normalizing the weights of each triangle by its bandwidth

sampleRate: real ∈ (0,inf) (default = 44100) the sampling rate of the audio signal [Hz]

type: string ∈ {magnitude,power} (default = "power") use magnitude or power spectrum

weighting: string ∈ {linear,slaneyMel,htkMel} (default = "linear") type of weighting function for determining triangle area

Description:

This algorithm computes energy in triangular frequency bands of a spectrum. The arbitrary number of overlapping bands can be specified. For each band the power-spectrum (mag-squared) is summed.

Parameter "frequencyBands" must contain at least two frequencies, they all must be positive and must be ordered ascentdantly, otherwise an exception will be thrown. TriangularBands is only defined for spectrum, which size is greater than 1.

Category: Spectral Mode: standard

Table of Contents

Properties

$algorithmName  : string
$category  : string
$essentia  : EssentiaFFI
$mode  : string
$parameters  : array<string|int, mixed>
$algorithmHandle  : CData|null
$configured  : bool

Methods

__construct()  : mixed
__destruct()  : mixed
compute()  : array<string|int, mixed>
getAlgorithmName()  : string
getCategory()  : string
getMode()  : string
getParameters()  : array<string|int, mixed>
setParameter()  : self
configure()  : void
isValidParameter()  : bool
validateInput()  : void
cleanupAlgorithm()  : void
configureAlgorithmParameters()  : void
estimateOutputSize()  : int
executeAlgorithm()  : array<string|int, mixed>
executeGenericAlgorithm()  : array<string|int, mixed>
executeSpecificAlgorithm()  : array<string|int, mixed>
getAlgorithmCreateFunction()  : string
getValidParameters()  : array<string|int, mixed>
initializeAlgorithm()  : void
prepareInput()  : mixed
processOutput()  : array<string|int, mixed>
processRhythmOutput()  : array<string|int, mixed>
processSpectralOutput()  : array<string|int, mixed>
processStatsOutput()  : array<string|int, mixed>
processTemporalOutput()  : array<string|int, mixed>
processTonalOutput()  : array<string|int, mixed>
setAlgorithmParameter()  : void
setArrayParameter()  : void
validateAlgorithmInput()  : void

Properties

$parameters

protected array<string|int, mixed> $parameters = []

Methods

__construct()

public __construct([array<string|int, mixed> $parameters = [] ]) : mixed
Parameters
$parameters : array<string|int, mixed> = []

compute()

public compute(mixed $input) : array<string|int, mixed>
Parameters
$input : mixed
Return values
array<string|int, mixed>

getAlgorithmName()

public getAlgorithmName() : string
Return values
string

getCategory()

public getCategory() : string
Return values
string

getParameters()

public getParameters() : array<string|int, mixed>
Return values
array<string|int, mixed>

setParameter()

public setParameter(string $key, mixed $value) : self
Parameters
$key : string
$value : mixed
Return values
self

configure()

protected configure(array<string|int, mixed> $parameters) : void
Parameters
$parameters : array<string|int, mixed>

isValidParameter()

protected isValidParameter(string $parameter) : bool
Parameters
$parameter : string
Return values
bool

validateInput()

protected validateInput(mixed $input, string $expectedType) : void
Parameters
$input : mixed
$expectedType : string

configureAlgorithmParameters()

private configureAlgorithmParameters() : void

estimateOutputSize()

private estimateOutputSize(mixed $input) : int
Parameters
$input : mixed
Return values
int

executeAlgorithm()

private executeAlgorithm(mixed $input) : array<string|int, mixed>
Parameters
$input : mixed
Return values
array<string|int, mixed>

executeGenericAlgorithm()

private executeGenericAlgorithm(FFI $ffi, mixed $input) : array<string|int, mixed>
Parameters
$ffi : FFI
$input : mixed
Return values
array<string|int, mixed>

executeSpecificAlgorithm()

private executeSpecificAlgorithm(FFI $ffi, mixed $input) : array<string|int, mixed>
Parameters
$ffi : FFI
$input : mixed
Return values
array<string|int, mixed>

getAlgorithmCreateFunction()

private getAlgorithmCreateFunction() : string
Return values
string

getValidParameters()

private getValidParameters() : array<string|int, mixed>
Return values
array<string|int, mixed>

prepareInput()

private prepareInput(mixed $input) : mixed
Parameters
$input : mixed

processOutput()

private processOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
$result : array<string|int, mixed>
Return values
array<string|int, mixed>

processRhythmOutput()

private processRhythmOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
$result : array<string|int, mixed>
Return values
array<string|int, mixed>

processSpectralOutput()

private processSpectralOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
$result : array<string|int, mixed>
Return values
array<string|int, mixed>

processStatsOutput()

private processStatsOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
$result : array<string|int, mixed>
Return values
array<string|int, mixed>

processTemporalOutput()

private processTemporalOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
$result : array<string|int, mixed>
Return values
array<string|int, mixed>

processTonalOutput()

private processTonalOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
$result : array<string|int, mixed>
Return values
array<string|int, mixed>

setAlgorithmParameter()

private setAlgorithmParameter(FFI $ffi, string $key, mixed $value) : void
Parameters
$ffi : FFI
$key : string
$value : mixed

setArrayParameter()

private setArrayParameter(FFI $ffi, string $key, array<string|int, mixed> $value) : void
Parameters
$ffi : FFI
$key : string
$value : array<string|int, mixed>

validateAlgorithmInput()

private validateAlgorithmInput(mixed $input) : void
Parameters
$input : mixed 

        

        
    




    

    

                                

                

                                
    

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