include/gau_cb_int32.h File Reference

#include <sphinx_config.h>
#include <cmd_ln.h>
#include <gau_cb.h>
#include <fixpoint.h>
#include <logmath.h>
#include <fe.h>

Go to the source code of this file.

Data Structures
struct	gau_den_int32_s
Typedefs
typedef struct gau_den_int32_s	gau_den_int32_t
	Type representing a single density for computation.
typedef float32	int32_mean_t
	Type of precomputed means for gau_cb_int32.
typedef float32	int32_var_t
	Type of precomputed invvars for gau_cb_int32.
typedef float32	int32_norm_t
	Type of precomputed norms for gau_cb_int32.
Functions
gau_cb_t *	gau_cb_int32_read (cmd_ln_t *config, const char *meanfn, const char *varfn, const char *normfn, logmath_t *lmath)
	Read a codebook of Gaussians from mean and variance files and precompute for logarithmic int32 computation.
void	gau_cb_int32_free (gau_cb_t *gau)
	Free a codebook loaded with gau_cb_int32_read().
int	gau_cb_int32_compute_all (gau_cb_t *gau, int mgau, int feat, mfcc_t *obs, int32 *out_den, int worst)
	Compute all floating point densities for a single feature stream in an observation.
int	gau_cb_int32_compute (gau_cb_t *gau, int mgau, int feat, mfcc_t *obs, gau_den_int32_t *inout_den, int nden)
	Compute a subset of floating point densities for a single feature stream in an observation.
int32_mean_t ****	gau_cb_int32_get_means (gau_cb_t *gau)
	Retrieve the mean vectors from the codebook.
int32_var_t ****	gau_cb_int32_get_invvars (gau_cb_t *gau)
	Retrieve the scaled inverse variance vectors from the codebook.
int32_norm_t ***	gau_cb_int32_get_norms (gau_cb_t *gau)
	Retrieve the log normalization constants from the codebook.

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Detailed Description

Author:

David Huggins-Daines <dhuggins@cs.cmu.edu>

Gaussian distribution parameters (log integer computation)

Definition in file gau_cb_int32.h.

---

Typedef Documentation

typedef float32 int32_mean_t

Type of precomputed means for gau_cb_int32.

Definition at line 114 of file gau_cb_int32.h.

typedef float32 int32_norm_t

Type of precomputed norms for gau_cb_int32.

Definition at line 116 of file gau_cb_int32.h.

typedef float32 int32_var_t

Type of precomputed invvars for gau_cb_int32.

Definition at line 115 of file gau_cb_int32.h.

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Function Documentation

int gau_cb_int32_compute	(	gau_cb_t *	gau,
		int	mgau,
		int	feat,
		mfcc_t *	obs,
		gau_den_int32_t *	inout_den,
		int	nden
	)

Compute a subset of floating point densities for a single feature stream in an observation.

Returns:

the offset in inout_den of the lowest density

int gau_cb_int32_compute_all	(	gau_cb_t *	gau,
		int	mgau,
		int	feat,
		mfcc_t *	obs,
		int32 *	out_den,
		int	worst
	)

Compute all floating point densities for a single feature stream in an observation.

Returns:

the index of the highest density

gau_cb_t* gau_cb_int32_read	(	cmd_ln_t *	config,
		const char *	meanfn,
		const char *	varfn,
		const char *	normfn,
		logmath_t *	lmath
	)

Read a codebook of Gaussians from mean and variance files and precompute for logarithmic int32 computation.

Parameters:

config	Configuration parameters
meanfn	Filename for means
varfn	Filename for variances
normfn	(optional) Filename for normalization constants
lmath	Log-math table (for logbase, etc)