#include <decodable-matrix.h>

Inheritance diagram for DecodableMatrixScaledMapped:

Collaboration diagram for DecodableMatrixScaledMapped:

[legend]

Public Member Functions
	DecodableMatrixScaledMapped (const TransitionModel &tm, const Matrix< BaseFloat > &likes, BaseFloat scale)

	DecodableMatrixScaledMapped (const TransitionModel &tm, BaseFloat scale, const Matrix< BaseFloat > *likes)

virtual int32	NumFramesReady () const
	The call NumFramesReady() will return the number of frames currently available for this decodable object. More...

virtual bool	IsLastFrame (int32 frame) const
	Returns true if this is the last frame. More...

virtual BaseFloat	LogLikelihood (int32 frame, int32 tid)
	Returns the log likelihood, which will be negated in the decoder. More...

virtual int32	NumIndices () const
	Returns the number of states in the acoustic model (they will be indexed one-based, i.e. More...

virtual	~DecodableMatrixScaledMapped ()

Public Member Functions inherited from DecodableInterface
virtual	~DecodableInterface ()

Private Member Functions
	KALDI_DISALLOW_COPY_AND_ASSIGN (DecodableMatrixScaledMapped)

Private Attributes
const TransitionModel &	trans_model_

const Matrix< BaseFloat > *	likes_

BaseFloat	scale_

bool	delete_likes_

Detailed Description

Definition at line 34 of file decodable-matrix.h.

Constructor & Destructor Documentation

◆ DecodableMatrixScaledMapped() [1/2]

DecodableMatrixScaledMapped	(	const TransitionModel &	tm,
		const Matrix< BaseFloat > &	likes,
		BaseFloat	scale
	)

inline

Definition at line 37 of file decodable-matrix.h.

References KALDI_ERR, MatrixBase< Real >::NumCols(), and TransitionModel::NumPdfs().

                                               : trans_model_(tm), likes_(&likes),
                                                 scale_(scale), delete_likes_(false) {
     if (likes.NumCols() != tm.NumPdfs())
       KALDI_ERR << "DecodableMatrixScaledMapped: mismatch, matrix has "
                 << likes.NumCols() << " cols but transition-model has "
                 << tm.NumPdfs() << " pdf-ids.";
   }

◆ DecodableMatrixScaledMapped() [2/2]

DecodableMatrixScaledMapped	(	const TransitionModel &	tm,
		BaseFloat	scale,
		const Matrix< BaseFloat > *	likes
	)

inline

Definition at line 49 of file decodable-matrix.h.

References KALDI_ERR, MatrixBase< Real >::NumCols(), and TransitionModel::NumPdfs().

                                                              :
       trans_model_(tm), likes_(likes),
       scale_(scale), delete_likes_(true) {
     if (likes->NumCols() != tm.NumPdfs())
       KALDI_ERR << "DecodableMatrixScaledMapped: mismatch, matrix has "
                 << likes->NumCols() << " cols but transition-model has "
                 << tm.NumPdfs() << " pdf-ids.";
   }

◆ ~DecodableMatrixScaledMapped()

virtual ~DecodableMatrixScaledMapped ( )

inlinevirtual

Definition at line 75 of file decodable-matrix.h.

References DecodableMatrixScaledMapped::delete_likes_, and DecodableMatrixScaledMapped::likes_.

                                          {
     if (delete_likes_) delete likes_;
   }

Member Function Documentation

◆ IsLastFrame()

virtual bool IsLastFrame ( int32 frame ) const

inlinevirtual

Returns true if this is the last frame.

Frames are zero-based, so the first frame is zero. IsLastFrame(-1) will return false, unless the file is empty (which is a case that I'm not sure all the code will handle, so be careful). Caution: the behavior of this function in an online setting is being changed somewhat. In future it may return false in cases where we haven't yet decided to terminate decoding, but later true if we decide to terminate decoding. The plan in future is to rely more on NumFramesReady(), and in future, IsLastFrame() would always return false in an online-decoding setting, and would only return true in a decoding-from-matrix setting where we want to allow the last delta or LDA features to be flushed out for compatibility with the baseline setup.

Implements DecodableInterface.

Definition at line 62 of file decodable-matrix.h.

References KALDI_ASSERT, and DecodableMatrixScaledMapped::NumFramesReady().

                                               {
     KALDI_ASSERT(frame < NumFramesReady());
     return (frame == NumFramesReady() - 1);
   }

◆ KALDI_DISALLOW_COPY_AND_ASSIGN()

KALDI_DISALLOW_COPY_AND_ASSIGN ( DecodableMatrixScaledMapped )

private

◆ LogLikelihood()

virtual BaseFloat LogLikelihood	(	int32	frame,
		int32	index
	)

inlinevirtual

Returns the log likelihood, which will be negated in the decoder.

The "frame" starts from zero. You should verify that NumFramesReady() > frame before calling this.

Implements DecodableInterface.

Definition at line 68 of file decodable-matrix.h.

References DecodableMatrixScaledMapped::scale_, DecodableMatrixScaledMapped::trans_model_, and TransitionModel::TransitionIdToPdfFast().

                                                           {
     return scale_ * (*likes_)(frame, trans_model_.TransitionIdToPdfFast(tid));
   }

◆ NumFramesReady()

virtual int32 NumFramesReady ( ) const

inlinevirtual

The call NumFramesReady() will return the number of frames currently available for this decodable object.

This is for use in setups where you don't want the decoder to block while waiting for input. This is newly added as of Jan 2014, and I hope, going forward, to rely on this mechanism more than IsLastFrame to know when to stop decoding.

Reimplemented from DecodableInterface.

Definition at line 60 of file decodable-matrix.h.

References DecodableMatrixScaledMapped::likes_, and MatrixBase< Real >::NumRows().

Referenced by DecodableMatrixScaledMapped::IsLastFrame(), DecodableMatrixMappedOffset::IsLastFrame(), and DecodableMatrixScaled::IsLastFrame().

60 { return likes_->NumRows(); }

kaldi::DecodableMatrixScaledMapped::likes_

const Matrix< BaseFloat > * likes_

Definition: decodable-matrix.h:80

kaldi::MatrixBase::NumRows

MatrixIndexT NumRows() const

Returns number of rows (or zero for empty matrix).

Definition: kaldi-matrix.h:64