PocketSphinx  5prealpha
s2_semi_mgau.h
1 /* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /* ====================================================================
3  * Copyright (c) 1999-2004 Carnegie Mellon University. All rights
4  * reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * This work was supported in part by funding from the Defense Advanced
19  * Research Projects Agency and the National Science Foundation of the
20  * United States of America, and the CMU Sphinx Speech Consortium.
21  *
22  * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
23  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
26  * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33  *
34  * ====================================================================
35  *
36  */
37 /*
38  * Interface for "semi-continuous vector quantization", a.k.a. Sphinx2
39  * fast GMM computation.
40  */
41 
42 #ifndef __S2_SEMI_MGAU_H__
43 #define __S2_SEMI_MGAU_H__
44 
45 /* SphinxBase headesr. */
46 #include <sphinxbase/fe.h>
47 #include <sphinxbase/logmath.h>
48 #include <sphinxbase/mmio.h>
49 
50 /* Local headers. */
51 #include "acmod.h"
52 #include "hmm.h"
53 #include "bin_mdef.h"
54 #include "ms_gauden.h"
55 
56 typedef struct vqFeature_s vqFeature_t;
57 
58 typedef struct s2_semi_mgau_s s2_semi_mgau_t;
61  cmd_ln_t *config; /* configuration parameters */
62 
63  gauden_t *g; /* Set of Gaussians (pointers below point in here and will go away soon) */
64 
65  uint8 ***mixw; /* mixture weight distributions */
66  mmio_file_t *sendump_mmap;/* memory map for mixw (or NULL if not mmap) */
67 
68  uint8 *mixw_cb; /* mixture weight codebook, if any (assume it contains 16 values) */
69  int32 n_sen; /* Number of senones */
70  uint8 *topn_beam; /* Beam for determining per-frame top-N densities */
71  int16 max_topn;
72  int16 ds_ratio;
73 
75  uint8 **topn_hist_n;
79  /* Log-add table for compressed values. */
80  logmath_t *lmath_8b;
81  /* Log-add object for reloading means/variances. */
82  logmath_t *lmath;
83 };
84 
85 ps_mgau_t *s2_semi_mgau_init(acmod_t *acmod);
86 void s2_semi_mgau_free(ps_mgau_t *s);
87 int s2_semi_mgau_frame_eval(ps_mgau_t *s,
88  int16 *senone_scores,
89  uint8 *senone_active,
90  int32 n_senone_active,
91  mfcc_t **featbuf,
92  int32 frame,
93  int32 compallsen);
94 int s2_semi_mgau_mllr_transform(ps_mgau_t *s,
95  ps_mllr_t *mllr);
96 
97 
98 #endif /* __S2_SEMI_MGAU_H__ */
int n_topn_hist
Number of past frames tracked.
Definition: s2_semi_mgau.h:77
vqFeature_t *** topn_hist
Top-N scores and codewords for past frames.
Definition: s2_semi_mgau.h:74
Binary format model definition files, with support for heterogeneous topologies and variable-size N-p...
Implementation of HMM base structure.
(Sphinx 3.0 specific) Gaussian density module.
Feature space linear transform structure.
Definition: acmod.h:82
uint8 ** topn_hist_n
Variable top-N for past frames.
Definition: s2_semi_mgau.h:75
Multivariate gaussian mixture density parameters.
Definition: ms_gauden.h:82
Acoustic model structures for PocketSphinx.
ps_mgau_t base
base structure.
Definition: s2_semi_mgau.h:60
vqFeature_t ** f
Topn-N for currently scoring frame.
Definition: s2_semi_mgau.h:76
Acoustic model structure.
Definition: acmod.h:148