org.openimaj.audio.filters

Class HammingAudioProcessor

java.lang.Object

org.openimaj.audio.Audio

org.openimaj.audio.AudioStream

org.openimaj.audio.processor.AudioProcessor

org.openimaj.audio.processor.FixedSizeSampleAudioProcessor

org.openimaj.audio.filters.WeightedWindowedAudioProcessor

org.openimaj.audio.filters.HanningAudioProcessor

org.openimaj.audio.filters.HammingAudioProcessor

All Implemented Interfaces:

Iterable<SampleChunk>

public class HammingAudioProcessor
extends HanningAudioProcessor

Applies a Hamming function over a window of samples.

Version:

$Author$, $Revision$, $Date$

Author:

David Dupplaw (dpd@ecs.soton.ac.uk)

Created:

4 Feb 2013

Field Summary

Fields inherited from class org.openimaj.audio.filters.WeightedWindowedAudioProcessor

useWeights, weightTable

Fields inherited from class org.openimaj.audio.Audio

format

Constructor Summary

Constructors

Constructor and Description
HammingAudioProcessor(AudioStream stream, int sizeRequired) Chainable constructor that takes the audio stream to chain to and the size of the window required.
HammingAudioProcessor(AudioStream as, int nSamplesInWindow, int nSamplesOverlap) Chainable constructor that takes the size of the window and the number of samples overlap.
HammingAudioProcessor(int sizeRequired) Constructor that takes the size of the window required.
HammingAudioProcessor(int nSamplesInWindow, int nSamplesOverlap) Constructor that takes the size of the window and the number of samples overlap.

Method Summary

Modifier and Type	Method and Description
protected void	generateWeightTableCache(int length, int nc) Generate the cos table cache

Methods inherited from class org.openimaj.audio.filters.WeightedWindowedAudioProcessor

getWeights, getWindowSum, getWindowSum, process, process, processSamples

Methods inherited from class org.openimaj.audio.processor.FixedSizeSampleAudioProcessor

getWindowSize, getWindowStep, isOverlapping, nextSampleChunk, setWindowSize, setWindowStep

Methods inherited from class org.openimaj.audio.processor.AudioProcessor

getLength, getUnderlyingStream, process, processingComplete, reset, setUnderlyingStream

Methods inherited from class org.openimaj.audio.AudioStream

iterator, seek

Methods inherited from class org.openimaj.audio.Audio

getFormat, setFormat

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

HammingAudioProcessor

public HammingAudioProcessor(int sizeRequired)

Constructor that takes the size of the window required.

Parameters:

sizeRequired - The size of the window in samples

HammingAudioProcessor

public HammingAudioProcessor(AudioStream stream,
                             int sizeRequired)

Chainable constructor that takes the audio stream to chain to and the size of the window required.

Parameters:

stream - The audio to chain to

sizeRequired - the size of the window in samples

HammingAudioProcessor

public HammingAudioProcessor(int nSamplesInWindow,
                             int nSamplesOverlap)

Constructor that takes the size of the window and the number of samples overlap.

Parameters:

nSamplesInWindow - Samples in window

nSamplesOverlap - Samples in window overlap

HammingAudioProcessor

public HammingAudioProcessor(AudioStream as,
                             int nSamplesInWindow,
                             int nSamplesOverlap)

Chainable constructor that takes the size of the window and the number of samples overlap.

Parameters:

as - The chained audio stream

nSamplesInWindow - Samples in window

nSamplesOverlap - Samples in window overlap

Method Detail

generateWeightTableCache

protected void generateWeightTableCache(int length,
                                        int nc)

Generate the cos table cache

Overrides:

generateWeightTableCache in class HanningAudioProcessor

Parameters:

length - The length of the window to generate (per channel)

nc - The number of channels for which to generate a weight table

See Also:

HanningAudioProcessor.generateWeightTableCache(int, int)