ms_senone.h File Reference

(Sphinx 3.0 specific) multiple streams senones. used with ms_gauden.h In Sphinx 3.0 family of tools, ms_senone is used to combine the Gaussian scores. Its existence is crucial in Sphinx 3.0 because 3.0 supports both SCHMM and CDHMM. There are optimization scheme for SCHMM (e.g. compute the top-N Gaussian) that is applicable to SCHMM than CDHMM. This is wrapped in senone_eval_all. More...

#include "s3types.h"
#include <logmath.h>
#include "ms_gauden.h"

Go to the source code of this file.

Classes
struct	senone_t
	8-bit senone PDF structure. More...
Typedefs
typedef uint32	senprob_t
Functions
senone_t *	senone_init (const char *mixwfile, const char *mgau_mapfile, float32 mixwfloor, logmath_t *logmath)
void	senone_free (senone_t *s)
int32	senone_eval (senone_t *s, s3senid_t id, gauden_dist_t **dist, int32 n_top)
void	senone_eval_all (senone_t *s, gauden_dist_t **dist, int32 n_top, int32 *senscr)

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Detailed Description

(Sphinx 3.0 specific) multiple streams senones. used with ms_gauden.h In Sphinx 3.0 family of tools, ms_senone is used to combine the Gaussian scores. Its existence is crucial in Sphinx 3.0 because 3.0 supports both SCHMM and CDHMM. There are optimization scheme for SCHMM (e.g. compute the top-N Gaussian) that is applicable to SCHMM than CDHMM. This is wrapped in senone_eval_all.

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Typedef Documentation

typedef uint32 senprob_t

Senone logs3-probs, truncated to 8 bits

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Function Documentation

int32 senone_eval (  senone_t *  s, s3senid_t  id, gauden_dist_t **  dist, int32  n_top )

Evaluate the score for the given senone wrt to the given top N gaussian codewords. Returns: senone score (in logs3 domain). Parameters: id  In: senone for which score desired dist  In: top N codewords and densities for all features, to be combined into senone score. IE, dist[f][i] = i-th best <codeword,density> for feaure f n_top  In: Length of dist[f], for each f

void senone_eval_all (  senone_t *  s, gauden_dist_t **  dist, int32  n_top, int32 *  senscr )

Like senone_eval, but compute all senone scores for the shared density case (ie, #codebooks = 1). Parameters: s  In: Senone structure dist  In: as in senone_eval above n_top  In: as in senone_eval above senscr  Out: Upon return, senscr[i] will contain score for senone i

void senone_free (  senone_t *  s  )

In: The senone_t to free

senone_t* senone_init (  const char *  mixwfile, const char *  mgau_mapfile, float32  mixwfloor, logmath_t *  logmath )

Load a set of senones (mixing weights and mixture gaussian codebook mappings) from the given files. Normalize weights for each codebook, apply the given floor, convert PDF values to logs3 domain and quantize to 8-bits. Returns: pointer to senone structure created. Caller MUST NOT change its contents. Parameters: mixwfile  In: mixing weights file mgau_mapfile  In: file specifying mapping from each senone to mixture gaussian codebook. If NULL all senones map to codebook 0 mixwfloor  In: Floor value for senone weights

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