BICchangeDetector Class Reference
[Machine Learning]

detect changes between to succeeding segments using BIC More...

#include <BICchangeDetector.h>

Inherits Marsyas::MarSystem.

Public Member Functions
	BICchangeDetector (const BICchangeDetector &a)
	copy constructor
	BICchangeDetector (std::string name)
	default constructor
MarSystem *	clone () const
	clones using the copy constructor
Private Member Functions
void	addControls ()
	adds relevant controls
void	myUpdate (MarControlPtr sender)
	updates the controls

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Detailed Description

detect changes between to succeeding segments using BIC

Detect changes between two succeeding segments using divergenceShape (or BattacharyyaShape), and validation using BIC and quasi-GMM modeling

Implementation by Luis Gustavo Martins - lmartins@inescporto.pt and David G. Cooper - dcooper@cs.umass.edu

Definition at line 43 of file BICchangeDetector.h.

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Constructor & Destructor Documentation

BICchangeDetector

(

std::string

name

)

default constructor

Parameters:

name

- the name of the change detector

Returns:

a BICchangeDetector

Definition at line 36 of file BICchangeDetector.cpp.

References BICchangeDetector::addControls(), and realvec::create().

Referenced by BICchangeDetector::clone().

BICchangeDetector

(

const BICchangeDetector &

a

)

copy constructor

Parameters:

BICchangeDetector

- the detector to be copied

Returns:

a BICchangeDetector

Definition at line 51 of file BICchangeDetector.cpp.

References realvec::create(), and BICchangeDetector::prevDists_.

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Member Function Documentation

void addControls

(

)

[private]

adds relevant controls

add the following controls: mrs_bool/reset mrs_real/alpha1 mrs_real/lambda

a side effect is that the dynamic threshold and previous distances are reset.

Reimplemented from MarSystem.

Definition at line 95 of file BICchangeDetector.cpp.

References MarSystem::updControl().

Referenced by BICchangeDetector::BICchangeDetector().

MarSystem * clone

(

)

const [virtual]

clones using the copy constructor

Returns:

a copy of the BICchangeDetector

Implements MarSystem.

Definition at line 79 of file BICchangeDetector.cpp.

References BICchangeDetector::BICchangeDetector().

void myUpdate

(

MarControlPtr

sender

)

[private, virtual]

updates the controls

segFrames_, nfeats_, and segHop_ are updated automatically to 2/5 * inSamples, inObservations, and 1/5 * inSamples respectively

If reset is true then the quasi-GMM and previous distances are reset.

BICchangeDetector must receive as input a vector of feature frames as depicted bellow, which includes 4 speech sub-segments (C1, C2, C3, C4) that will be used for detecting speaker changes: |------------------------| C1 C2 |----+----|----+----| |----+----|----+----| C3 C4 |--->| hop

For now, hop is set fixed as 1/5 of inSamples [!]

Reimplemented from MarSystem.

Definition at line 135 of file BICchangeDetector.cpp.

References MarSystem::name_, QGMMModel::resetModel(), realvec::setval(), and MarSystem::updControl().

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

• /home/marsyas/marsyas/src/marsyas/BICchangeDetector.h
• /home/marsyas/marsyas/src/marsyas/BICchangeDetector.cpp