CLAM-Development  1.1
Public Member Functions
CLAM::AudioDescriptors Class Reference

#include <AudioDescriptors.hxx>

List of all members.

Public Member Functions

 DYNAMIC_TYPE_USING_INTERFACE (AudioDescriptors, 8, DescriptorAbs)
 DYN_ATTRIBUTE (0, public, TData, Mean)
 The mean value of the absolute value of the audio samples amplitude.
 DYN_ATTRIBUTE (1, public, TData, Variance)
 The variance of audio samples amplitude.
 DYN_ATTRIBUTE (2, public, TData, TemporalCentroid)
 The temporal centroid is time where signal energy is "concentrated".
 DYN_ATTRIBUTE (3, public, TData, LogAttackTime)
 The log-attack time is the (base 10) logarithm of the rise time.
 DYN_ATTRIBUTE (4, public, TData, Energy)
 The squared sum of audio samples amplitudes.
 DYN_ATTRIBUTE (5, public, TData, ZeroCrossingRate)
 The zero-crossing rate is a measure of the number of time the signal value cross the zero axe, averaged over the whole signal.
 DYN_ATTRIBUTE (6, public, TData, RiseTime)
 The rise time is the time duration between the signal reached 2% of it maximum value to the time it reaches 80% of its maximum value.
 DYN_ATTRIBUTE (7, public, TData, Decrease)
 The temporal decrease is a measure of the amount of decrease in the signal energy.
 AudioDescriptors (Audio *pAudio)
 AudioDescriptors (TData initVal)
const AudioGetpAudio () const
void SetpAudio (Audio *pAudio)
void ConcreteCompute ()

Detailed Description

Definition at line 38 of file AudioDescriptors.hxx.


Constructor & Destructor Documentation

Definition at line 34 of file AudioDescriptors.cxx.

Definition at line 40 of file AudioDescriptors.cxx.

References CLAM::DynamicType::UpdateData().


Member Function Documentation

CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
Mean   
)

The mean value of the absolute value of the audio samples amplitude.

The result is in signal units.

See also:
Stats::GetMean
CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
Variance   
)

The variance of audio samples amplitude.

The result is in signal difference squared units.

See also:
Stats::GetVariance
CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
TemporalCentroid   
)

The temporal centroid is time where signal energy is "concentrated".

For a "silence" signal the centroid will be placed in the middle of the signal. It is computed by computing the statistical centroid over the absolute value of the signal. Measured in seconds.

See also:
Stats::GetCentroid
CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
LogAttackTime   
)

The log-attack time is the (base 10) logarithm of the rise time.

For a silent signal, log-attack time is -5. Measured in log10(seconds).

CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
Energy   
)

The squared sum of audio samples amplitudes.

This measure is not limited to the range [0,1]. Measured in squared signal units.

See also:
Stats::GetEnergy
CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
ZeroCrossingRate   
)

The zero-crossing rate is a measure of the number of time the signal value cross the zero axe, averaged over the whole signal.

Measured in crossings/second.

CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
RiseTime   
)

The rise time is the time duration between the signal reached 2% of it maximum value to the time it reaches 80% of its maximum value.

For a silent signal, rise time is 0. Measured in seconds.

CLAM::AudioDescriptors::DYN_ATTRIBUTE ( ,
public  ,
TData  ,
Decrease   
)

The temporal decrease is a measure of the amount of decrease in the signal energy.

Measured in dB per seconds??

Definition at line 64 of file AudioDescriptors.cxx.

Definition at line 70 of file AudioDescriptors.cxx.

References CLAM::DescriptorTmpl< abs >::InitStats().


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