marytts.signalproc.filter

Class FIRBandPassFilterBankAnalyser

java.lang.Object

marytts.signalproc.filter.FilterBankAnalyserBase

marytts.signalproc.filter.FIRBandPassFilterBankAnalyser

All Implemented Interfaces:

FilterBankAnalyser

public class FIRBandPassFilterBankAnalyser
extends FilterBankAnalyserBase

This is a simple FIR bandpass filterbank structure with no resampling operations The filters are overlapping and a simple DFT-based frequency response estimation method is used for reducing reconstruction error due to non-ideal filtering scheme and overlap among filters Given a sampling rate and a set of lower and upper cutoff frequency values in Hz, a set of bandpass filters that overlap by some amount in frequency

Author:

Oytun Türk

Field Summary

Fields

Modifier and Type	Field and Description
FIRFilter[]	filters
double[]	lowerCutOffsInHz
double[]	normalizationFilterTransformedIR
static double	OVERLAP_AROUND_1000HZ_DEFAULT
double	overlapAround1000Hz
int	samplingRateInHz
double[]	upperCutOffsInHz

Fields inherited from class marytts.signalproc.filter.FilterBankAnalyserBase

COMPLEMENTARY_FILTERBANK, FIR_BANDPASS_FILTERBANK, FIR_WAVELET_FILTERBANK

Constructor Summary

Constructors

Constructor and Description
FIRBandPassFilterBankAnalyser(double[] lowerCutOffsInHzIn, double[] upperCutOffsInHzIn, int samplingRateInHzIn)
FIRBandPassFilterBankAnalyser(double[] lowerCutOffsInHzIn, double[] upperCutOffsInHzIn, int samplingRateInHzIn, double overlapAround1000HzIn)
FIRBandPassFilterBankAnalyser(int numBands, int samplingRateInHz)
FIRBandPassFilterBankAnalyser(int numBands, int samplingRateInHzIn, double overlapAround1000HzIn)

Method Summary

Methods

Modifier and Type	Method and Description
Subband[]	apply(double[] x)
void	initialise(double[] lowerCutOffsInHzIn, double[] upperCutOffsInHzIn, double overlapAround1000HzIn)
static void	main(String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OVERLAP_AROUND_1000HZ_DEFAULT

public static final double OVERLAP_AROUND_1000HZ_DEFAULT

See Also:

Constant Field Values

overlapAround1000Hz

public double overlapAround1000Hz

samplingRateInHz

public int samplingRateInHz

filters

public FIRFilter[] filters

normalizationFilterTransformedIR

public double[] normalizationFilterTransformedIR

lowerCutOffsInHz

public double[] lowerCutOffsInHz

upperCutOffsInHz

public double[] upperCutOffsInHz

Constructor Detail

FIRBandPassFilterBankAnalyser

public FIRBandPassFilterBankAnalyser(int numBands,
                             int samplingRateInHz)

FIRBandPassFilterBankAnalyser

public FIRBandPassFilterBankAnalyser(int numBands,
                             int samplingRateInHzIn,
                             double overlapAround1000HzIn)

FIRBandPassFilterBankAnalyser

public FIRBandPassFilterBankAnalyser(double[] lowerCutOffsInHzIn,
                             double[] upperCutOffsInHzIn,
                             int samplingRateInHzIn)

FIRBandPassFilterBankAnalyser

public FIRBandPassFilterBankAnalyser(double[] lowerCutOffsInHzIn,
                             double[] upperCutOffsInHzIn,
                             int samplingRateInHzIn,
                             double overlapAround1000HzIn)

Method Detail

initialise

public void initialise(double[] lowerCutOffsInHzIn,
              double[] upperCutOffsInHzIn,
              double overlapAround1000HzIn)

apply

public Subband[] apply(double[] x)

Specified by:

apply in interface FilterBankAnalyser

Overrides:

apply in class FilterBankAnalyserBase

main

public static void main(String[] args)
                 throws UnsupportedAudioFileException,
                        IOException

Throws:

UnsupportedAudioFileException

IOException