Sgmm2LikelihoodCache caches SGMM likelihoods at two levels: the final pdf likelihoods, and the sub-state level likelihoods, which means that with the SCTM system we can avoid redundant computation. More...

#include <am-sgmm2.h>

Collaboration diagram for Sgmm2LikelihoodCache:

[legend]

Classes
struct	PdfCacheElement

struct	SubstateCacheElement

Public Member Functions
	Sgmm2LikelihoodCache (int32 num_groups, int32 num_pdfs)

void	NextFrame ()

Public Attributes
std::vector< SubstateCacheElement >	substate_cache

std::vector< PdfCacheElement >	pdf_cache

int32	t

Detailed Description

Sgmm2LikelihoodCache caches SGMM likelihoods at two levels: the final pdf likelihoods, and the sub-state level likelihoods, which means that with the SCTM system we can avoid redundant computation.

You need to call NextFrame() on the cache, between frames.

Definition at line 199 of file am-sgmm2.h.

Constructor & Destructor Documentation

◆ Sgmm2LikelihoodCache()

Sgmm2LikelihoodCache	(	int32	num_groups,
		int32	num_pdfs
	)

inline

Definition at line 202 of file am-sgmm2.h.

202 :

203 substate_cache(num_groups), pdf_cache(num_pdfs), t(1) { }

kaldi::Sgmm2LikelihoodCache::t

int32 t

Definition: am-sgmm2.h:224

kaldi::Sgmm2LikelihoodCache::pdf_cache

std::vector< PdfCacheElement > pdf_cache

Definition: am-sgmm2.h:223

kaldi::Sgmm2LikelihoodCache::substate_cache

std::vector< SubstateCacheElement > substate_cache

Definition: am-sgmm2.h:222

Member Function Documentation

◆ NextFrame()

void NextFrame ( )

Definition at line 39 of file am-sgmm2.cc.

References rnnlm::i, Sgmm2LikelihoodCache::pdf_cache, Sgmm2LikelihoodCache::substate_cache, and Sgmm2LikelihoodCache::t.

Referenced by DecodableAmSgmm2::LogLikelihoodForPdf().

                                      {
   t++;
   if (t == 0) {
     t++; // skip over zero; zero is used to invalidate frames.
     for (size_t i = 0; i < substate_cache.size(); i++)
       substate_cache[i].t = 0;
     for (size_t i = 0; i < pdf_cache.size(); i++)
       pdf_cache[i].t = 0;
   }
 }