Collaboration diagram for IvectorExtractTask:

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Public Member Functions
	IvectorExtractTask (const IvectorExtractor &extractor, std::string utt, const Matrix< BaseFloat > &feats, const Posterior &posterior, BaseFloatVectorWriter writer, double tot_auxf_change)

void	operator() ()

	~IvectorExtractTask ()

Private Attributes
const IvectorExtractor &	extractor_

std::string	utt_

Matrix< BaseFloat >	feats_

Posterior	posterior_

BaseFloatVectorWriter *	writer_

double *	tot_auxf_change_

Vector< double >	ivector_

double	auxf_change_

Detailed Description

Definition at line 32 of file ivector-extract.cc.

Constructor & Destructor Documentation

◆ IvectorExtractTask()

IvectorExtractTask	(	const IvectorExtractor &	extractor,
		std::string	utt,
		const Matrix< BaseFloat > &	feats,
		const Posterior &	posterior,
		BaseFloatVectorWriter *	writer,
		double *	tot_auxf_change
	)

inline

Definition at line 34 of file ivector-extract.cc.

Referenced by main().

                                              :
       extractor_(extractor), utt_(utt), feats_(feats), posterior_(posterior),
       writer_(writer), tot_auxf_change_(tot_auxf_change) { }

◆ ~IvectorExtractTask()

~IvectorExtractTask ( )

inline

Definition at line 64 of file ivector-extract.cc.

References IvectorExtractTask::auxf_change_, IvectorExtractTask::extractor_, IvectorExtractTask::ivector_, KALDI_VLOG, VectorBase< Real >::Norm(), IvectorExtractTask::posterior_, IvectorExtractor::PriorOffset(), IvectorExtractTask::tot_auxf_change_, kaldi::TotalPosterior(), IvectorExtractTask::utt_, TableWriter< Holder >::Write(), and IvectorExtractTask::writer_.

                         {
     if (tot_auxf_change_ != NULL) {
       double T = TotalPosterior(posterior_);
       *tot_auxf_change_ += auxf_change_;
       KALDI_VLOG(2) << "Auxf change for utterance " << utt_ << " was "
                     << (auxf_change_ / T) << " per frame over " << T
                     << " frames (weighted)";
     }
     // We actually write out the offset of the iVectors from the mean of the
     // prior distribution; this is the form we'll need it in for scoring.  (most
     // formulations of iVectors have zero-mean priors so this is not normally an
     // issue).
     ivector_(0) -= extractor_.PriorOffset();
     KALDI_VLOG(2) << "Ivector norm for utterance " << utt_
                   << " was " << ivector_.Norm(2.0);
     writer_->Write(utt_, Vector<BaseFloat>(ivector_));
   }

Member Function Documentation

◆ operator()()

void operator() ( )

inline

Definition at line 43 of file ivector-extract.cc.

References IvectorExtractorUtteranceStats::AccStats(), IvectorExtractTask::auxf_change_, IvectorExtractTask::extractor_, IvectorExtractor::FeatDim(), IvectorExtractTask::feats_, IvectorExtractor::GetAuxf(), IvectorExtractor::GetIvectorDistribution(), IvectorExtractTask::ivector_, IvectorExtractor::IvectorDim(), IvectorExtractor::NumGauss(), IvectorExtractTask::posterior_, IvectorExtractor::PriorOffset(), Vector< Real >::Resize(), and IvectorExtractTask::tot_auxf_change_.

                       {
     bool need_2nd_order_stats = false;
 
     IvectorExtractorUtteranceStats utt_stats(extractor_.NumGauss(),
                                              extractor_.FeatDim(),
                                              need_2nd_order_stats);
 
     utt_stats.AccStats(feats_, posterior_);
 
     ivector_.Resize(extractor_.IvectorDim());
     ivector_(0) = extractor_.PriorOffset();
 
     if (tot_auxf_change_ != NULL) {
       double old_auxf = extractor_.GetAuxf(utt_stats, ivector_);
       extractor_.GetIvectorDistribution(utt_stats, &ivector_, NULL);
       double new_auxf = extractor_.GetAuxf(utt_stats, ivector_);
       auxf_change_ = new_auxf - old_auxf;
     } else {
       extractor_.GetIvectorDistribution(utt_stats, &ivector_, NULL);
     }
   }