A 5-pole halfband lowpass/highpass filter built-up from allpass building blocks. More...

#include <TTHalfband5.h>

Inheritance diagram for TTHalfband5:

Collaboration diagram for TTHalfband5:

Protected Member Functions
virtual TTErr	test (TTValue &returnedTestInfo)
	Unit Tests. More...

Protected Attributes
TTAudioObject	mF0
	filter0 (in the upper path)

TTAudioObject	mF1
	filter1 (in the lower path, second block)

TTAudioObject	mDelay
	delay (in the lower path, first block)

TTAudioObject	mR0
	resampling filter0 (in the upper path)

TTAudioObject	mR1
	resampling filter1 (in the lower path, second block)

TTSampleVector	mRSwitch
	resampling switch (so we know which path to calculate)

TTSampleVector	mY0
	resampling path0 output (for each channel)

TTSampleVector	mY1
	resampling path1 output (for each channel)

TTSymbol	mMode
	Attribute: lowpass or highpass.

Detailed Description

A 5-pole halfband lowpass/highpass filter built-up from allpass building blocks.

Based on Multirate Signal Processing for Communication Systems, Chapter 10, Page 18.

Passband edge (i.e. Fc or -3db) at Fs/4, and stopband edge (-60db) at Fs*0.370.

Definition at line 30 of file TTHalfband5.h.

Member Function Documentation

TTErr TTHalfband5::test ( TTValue & returnedTestInfo )

protectedvirtual

Unit Tests.

Parameters

returnedTestInfo Used to return test information

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

The following values are not necsessarily to be trusted. They were calculated from this filter unit itself at a time when the filter was assumed to work. As such, if this test fails in the future, it should be considered an indication that something has changed in the code or compiler that causes the calculated impulse response to differ from earlier results, but this test is not able to say anything meaningful about whether the old or new behaviour is to be trusted (or eventually none of them).

Reimplemented from TTAudioObjectBase.

Definition at line 20 of file TTHalfband5.test.cpp.

References TTAudioSignal::allocWithVectorSize(), TTAudioSignal::clear(), TTAudioSignal::mSampleVectors, TTAudioObjectBase::process(), TTObjectBaseInstantiate(), and TTObjectBaseRelease().

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The documentation for this class was generated from the following files:

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation