OnlineCmvnState Struct Reference

Struct OnlineCmvnState stores the state of CMVN adaptation between utterances (but not the state of the computation within an utterance). More...

#include <online-feature.h>

Collaboration diagram for OnlineCmvnState:

Public Member Functions
	OnlineCmvnState ()
	OnlineCmvnState (const Matrix< double > &global_stats)
	OnlineCmvnState (const OnlineCmvnState &other)
void	Write (std::ostream &os, bool binary) const
void	Read (std::istream &is, bool binary)

Public Attributes
Matrix< double >	speaker_cmvn_stats
Matrix< double >	global_cmvn_stats
Matrix< double >	frozen_state

Detailed Description

Struct OnlineCmvnState stores the state of CMVN adaptation between utterances (but not the state of the computation within an utterance).

It stores the global CMVN stats and the stats of the current speaker (if we have seen previous utterances for this speaker), and possibly will have a member "frozen_state": if the user has called the function Freeze() of class OnlineCmvn, to fix the CMVN so we can estimate fMLLR on top of the fixed value of cmvn. If nonempty, "frozen_state" will reflect how we were normalizing the mean and (if applicable) variance at the time when that function was called.

Definition at line 266 of file online-feature.h.

Constructor & Destructor Documentation

OnlineCmvnState() [1/3]

OnlineCmvnState ( )

inline

Definition at line 281 of file online-feature.h.

{ }

OnlineCmvnState() [2/3]

OnlineCmvnState ( const Matrix< double > &  global_stats )

inlineexplicit

Definition at line 283 of file online-feature.h.

                                                              :
      global_cmvn_stats(global_stats) { }

OnlineCmvnState() [3/3]

OnlineCmvnState

(

const OnlineCmvnState &

other

)

Definition at line 211 of file online-feature.cc.

                                                            :
    speaker_cmvn_stats(other.speaker_cmvn_stats),
    global_cmvn_stats(other.global_cmvn_stats),
    frozen_state(other.frozen_state) { }

Member Function Documentation

Read()

void Read	(	std::istream &	is,
		bool	binary
	)

Definition at line 227 of file online-feature.cc.

References kaldi::ExpectToken(), OnlineCmvnState::frozen_state, OnlineCmvnState::global_cmvn_stats, Matrix< Real >::Read(), and OnlineCmvnState::speaker_cmvn_stats.

Referenced by OnlineGmmAdaptationState::Read(), and OnlineIvectorExtractorAdaptationState::Read().

                                                      {
  ExpectToken(is, binary, "<OnlineCmvnState>");  // magic string.
  ExpectToken(is, binary, "<SpeakerCmvnStats>");
  speaker_cmvn_stats.Read(is, binary);
  ExpectToken(is, binary, "<GlobalCmvnStats>");
  global_cmvn_stats.Read(is, binary);
  ExpectToken(is, binary, "<FrozenState>");
  frozen_state.Read(is, binary);
  ExpectToken(is, binary, "</OnlineCmvnState>");
}

Write()

void Write	(	std::ostream &	os,
		bool	binary
	)		const

Definition at line 216 of file online-feature.cc.

References OnlineCmvnState::frozen_state, OnlineCmvnState::global_cmvn_stats, OnlineCmvnState::speaker_cmvn_stats, MatrixBase< Real >::Write(), and kaldi::WriteToken().

Referenced by OnlineGmmAdaptationState::Write(), and OnlineIvectorExtractorAdaptationState::Write().

                                                             {
  WriteToken(os, binary, "<OnlineCmvnState>");  // magic string.
  WriteToken(os, binary, "<SpeakerCmvnStats>");
  speaker_cmvn_stats.Write(os, binary);
  WriteToken(os, binary, "<GlobalCmvnStats>");
  global_cmvn_stats.Write(os, binary);
  WriteToken(os, binary, "<FrozenState>");
  frozen_state.Write(os, binary);
  WriteToken(os, binary, "</OnlineCmvnState>");
}

Member Data Documentation

frozen_state

Matrix<double> frozen_state

Definition at line 279 of file online-feature.h.

Referenced by OnlineCmvn::GetState(), OnlineIvectorExtractorAdaptationState::LimitFrames(), OnlineCmvnState::Read(), OnlineCmvn::SetState(), and OnlineCmvnState::Write().

global_cmvn_stats

Matrix<double> global_cmvn_stats

Definition at line 274 of file online-feature.h.

Referenced by OnlineCmvn::Freeze(), OnlineCmvn::GetFrame(), OnlineCmvnState::Read(), and OnlineCmvnState::Write().

speaker_cmvn_stats

Matrix<double> speaker_cmvn_stats

Definition at line 269 of file online-feature.h.

Referenced by OnlineCmvn::Freeze(), OnlineCmvn::GetFrame(), OnlineCmvn::GetState(), OnlineIvectorExtractorAdaptationState::LimitFrames(), OnlineCmvnState::Read(), and OnlineCmvnState::Write().

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

• feat/online-feature.h
• feat/online-feature.cc