posterior.h File Reference

#include "base/kaldi-common.h"
#include "util/const-integer-set.h"
#include "util/kaldi-table.h"
#include "hmm/transition-model.h"
#include "matrix/kaldi-matrix.h"

Include dependency graph for posterior.h:

Go to the source code of this file.

Classes
class	PosteriorHolder
class	GaussPostHolder
struct	CompareReverseSecond

Namespaces
	kaldi
	This code computes Goodness of Pronunciation (GOP) and extracts phone-level pronunciation feature for mispronunciations detection tasks, the reference:

Typedefs
typedef std::vector< std::vector< std::pair< int32, BaseFloat > > >	Posterior
	Posterior is a typedef for storing acoustic-state (actually, transition-id) posteriors over an utterance. More...
typedef std::vector< std::vector< std::pair< int32, Vector< BaseFloat > > > >	GaussPost
	GaussPost is a typedef for storing Gaussian-level posteriors for an utterance. More...
typedef TableWriter< PosteriorHolder >	PosteriorWriter
typedef SequentialTableReader< PosteriorHolder >	SequentialPosteriorReader
typedef RandomAccessTableReader< PosteriorHolder >	RandomAccessPosteriorReader
typedef TableWriter< GaussPostHolder >	GaussPostWriter
typedef SequentialTableReader< GaussPostHolder >	SequentialGaussPostReader
typedef RandomAccessTableReader< GaussPostHolder >	RandomAccessGaussPostReader

Functions
void	WritePosterior (std::ostream &os, bool binary, const Posterior &post)
	stand-alone function for writing a Posterior. More...
void	ReadPosterior (std::istream &os, bool binary, Posterior *post)
	stand-alone function for reading a Posterior. More...
void	ScalePosterior (BaseFloat scale, Posterior *post)
	Scales the BaseFloat (weight) element in the posterior entries. More...
BaseFloat	TotalPosterior (const Posterior &post)
	Returns the total of all the weights in "post". More...
bool	PosteriorEntriesAreDisjoint (const std::vector< std::pair< int32, BaseFloat > > &post_elem1, const std::vector< std::pair< int32, BaseFloat > > &post_elem2)
	Returns true if the two lists of pairs have no common .first element. More...
int32	MergePosteriors (const Posterior &post1, const Posterior &post2, bool merge, bool drop_frames, Posterior *post)
	Merge two sets of posteriors, which must have the same length. More...
BaseFloat	VectorToPosteriorEntry (const VectorBase< BaseFloat > &log_likes, int32 num_gselect, BaseFloat min_post, std::vector< std::pair< int32, BaseFloat > > *post_entry)
	Given a vector of log-likelihoods (typically of Gaussians in a GMM but could be of pdf-ids), a number gselect >= 1 and a minimum posterior 0 <= min_post < 1, it gets the posterior for each element of log-likes by applying Softmax(), then prunes the posteriors using "gselect" and "min_post" (keeping at least one), and outputs the result into "post_entry", sorted from greatest to least posterior. More...
void	AlignmentToPosterior (const std::vector< int32 > &ali, Posterior *post)
	Convert an alignment to a posterior (with a scale of 1.0 on each entry). More...
void	SortPosteriorByPdfs (const TransitionModel &tmodel, Posterior *post)
	Sorts posterior entries so that transition-ids with same pdf-id are next to each other. More...
void	ConvertPosteriorToPdfs (const TransitionModel &tmodel, const Posterior &post_in, Posterior *post_out)
	Converts a posterior over transition-ids to be a posterior over pdf-ids. More...
void	ConvertPosteriorToPhones (const TransitionModel &tmodel, const Posterior &post_in, Posterior *post_out)
	Converts a posterior over transition-ids to be a posterior over phones. More...
void	WeightSilencePost (const TransitionModel &trans_model, const ConstIntegerSet< int32 > &silence_set, BaseFloat silence_scale, Posterior *post)
	Weight any silence phones in the posterior (i.e. More...
void	WeightSilencePostDistributed (const TransitionModel &trans_model, const ConstIntegerSet< int32 > &silence_set, BaseFloat silence_scale, Posterior *post)
	This is similar to WeightSilencePost, except that on each frame it works out the amount by which the overall posterior would be reduced, and scales down everything on that frame by the same amount. More...
template<typename Real >
void	PosteriorToMatrix (const Posterior &post, const int32 post_dim, Matrix< Real > *mat)
	This converts a Posterior to a Matrix. More...
template<typename Real >
void	PosteriorToPdfMatrix (const Posterior &post, const TransitionModel &model, Matrix< Real > *mat)
	This converts a Posterior to a Matrix. More...