gs.h File Reference

(Not opened to public) Gaussian selector Implentation More...

#include <stdio.h>
#include <s3types.h>
#include <logmath.h>

Go to the source code of this file.

Classes
struct	gs_s
Typedefs
typedef gs_s	gs_t
Functions
int32	gs_display (char *file, gs_t *gs)
gs_t *	gs_read (const char *file, logmath_t *logmath)
int32	gc_compute_closest_cw (gs_t *gs, float32 *feat)
int32	gs_mgau_shortlist (gs_t *gs, int32 m, int32 n, float32 *feat, int32 bst_codeid)

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Detailed Description

(Not opened to public) Gaussian selector Implentation

Implementation of Bochierri 93's idea of Gaussian Selection. A pre-computed Gaussian selector map (not distributed in Sphinx 3 but in s3fast.tgz distributed in Arthur Chan's web page) encode the closest neighbors of a given codeword and a given GMM.

In decoding, the closest codeword of the feature is first found and the nearest neighborhood(s) for all GMMs will be retrieved from the Gaussian selector map.

The reason why this file is not opened to the public is because sub-vector quantization supersed this idea conceptually. Although our SVQ implementation do not assume multiple Gaussians to be computed given a sub-stream(sub-vector) codeword is found. It is not difficult to extend the implementation to accomplish that.

Saying this, for implementation symmetry, we should still check in the Gaussian selector implementation in this archive.

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Typedef Documentation

typedef struct gs_s gs_t

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Function Documentation

int32 gc_compute_closest_cw (  gs_t *  gs, float32 *  feat )

Choose the closet Gaussian codebook to use Parameters: gs  gaussain selector feat  feature

int32 gs_display (  char *  file, gs_t *  gs )

display the Gaussian selector Parameters: file  file to display gs  The structure of the gaussian selector

int32 gs_mgau_shortlist (  gs_t *  gs, int32  m, int32  n, float32 *  feat, int32  bst_codeid )

Find the short list of the Gaussian selector Parameters: gs  gaussain selector m  mixture index n  number of mixtures feat  feature vector bst_codeid  best code indx

gs_t* gs_read (  const char *  file, logmath_t *  logmath )

Read the Gaussian selector Parameters: file  a file to display

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