summaryrefslogtreecommitdiff
path: root/media/sphinxbase/src/libsphinxbase/feat/cmn.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/sphinxbase/src/libsphinxbase/feat/cmn.c')
-rw-r--r--media/sphinxbase/src/libsphinxbase/feat/cmn.c238
1 files changed, 0 insertions, 238 deletions
diff --git a/media/sphinxbase/src/libsphinxbase/feat/cmn.c b/media/sphinxbase/src/libsphinxbase/feat/cmn.c
deleted file mode 100644
index c133c19a3d..0000000000
--- a/media/sphinxbase/src/libsphinxbase/feat/cmn.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
-/* ====================================================================
- * Copyright (c) 1999-2004 Carnegie Mellon University. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * This work was supported in part by funding from the Defense Advanced
- * Research Projects Agency and the National Science Foundation of the
- * United States of America, and the CMU Sphinx Speech Consortium.
- *
- * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
- * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
- * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ====================================================================
- *
- */
-/*
- * cmn.c -- Various forms of cepstral mean normalization
- *
- * **********************************************
- * CMU ARPA Speech Project
- *
- * Copyright (c) 1996 Carnegie Mellon University.
- * ALL RIGHTS RESERVED.
- * **********************************************
- *
- * HISTORY
- * $Log$
- * Revision 1.14 2006/02/24 15:57:47 egouvea
- * Removed cmn = NULL from the cmn_free(), since it's pointless (my bad!).
- *
- * Removed cmn_prior, which was surrounded by #if 0/#endif, since the
- * function is already in cmn_prior.c
- *
- * Revision 1.13 2006/02/23 03:47:49 arthchan2003
- * Used Evandro's changes. Resolved conflicts.
- *
- *
- * Revision 1.12 2006/02/23 00:48:23 egouvea
- * Replaced loops resetting vectors with the more efficient memset()
- *
- * Revision 1.11 2006/02/22 23:43:55 arthchan2003
- * Merged from the branch SPHINX3_5_2_RCI_IRII_BRANCH: Put data structure into the cmn_t structure.
- *
- * Revision 1.10.4.2 2005/10/17 04:45:57 arthchan2003
- * Free stuffs in cmn and feat corectly.
- *
- * Revision 1.10.4.1 2005/07/05 06:25:08 arthchan2003
- * Fixed dox-doc.
- *
- * Revision 1.10 2005/06/21 19:28:00 arthchan2003
- * 1, Fixed doxygen documentation. 2, Added $ keyword.
- *
- * Revision 1.3 2005/03/30 01:22:46 archan
- * Fixed mistakes in last updates. Add
- *
- *
- * 20.Apr.2001 RAH (rhoughton@mediasite.com, ricky.houghton@cs.cmu.edu)
- * Added cmn_free() and moved *mean and *var out global space and named them cmn_mean and cmn_var
- *
- * 28-Apr-1999 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
- * Changed the name norm_mean() to cmn().
- *
- * 19-Jun-1996 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
- * Changed to compute CMN over ALL dimensions of cep instead of 1..12.
- *
- * 04-Nov-1995 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
- * Created.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include <math.h>
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#ifdef _MSC_VER
-#pragma warning (disable: 4244)
-#endif
-
-#include "sphinxbase/ckd_alloc.h"
-#include "sphinxbase/err.h"
-#include "sphinxbase/cmn.h"
-
-/* NOTE! These must match the enum in cmn.h */
-const char *cmn_type_str[] = {
- "none",
- "current",
- "prior"
-};
-static const int n_cmn_type_str = sizeof(cmn_type_str)/sizeof(cmn_type_str[0]);
-
-cmn_type_t
-cmn_type_from_str(const char *str)
-{
- int i;
-
- for (i = 0; i < n_cmn_type_str; ++i) {
- if (0 == strcmp(str, cmn_type_str[i]))
- return (cmn_type_t)i;
- }
- E_FATAL("Unknown CMN type '%s'\n", str);
- return CMN_NONE;
-}
-
-cmn_t *
-cmn_init(int32 veclen)
-{
- cmn_t *cmn;
- cmn = (cmn_t *) ckd_calloc(1, sizeof(cmn_t));
- cmn->veclen = veclen;
- cmn->cmn_mean = (mfcc_t *) ckd_calloc(veclen, sizeof(mfcc_t));
- cmn->cmn_var = (mfcc_t *) ckd_calloc(veclen, sizeof(mfcc_t));
- cmn->sum = (mfcc_t *) ckd_calloc(veclen, sizeof(mfcc_t));
- /* A front-end dependent magic number */
- cmn->cmn_mean[0] = FLOAT2MFCC(12.0);
- cmn->nframe = 0;
- E_INFO("mean[0]= %.2f, mean[1..%d]= 0.0\n",
- MFCC2FLOAT(cmn->cmn_mean[0]), veclen - 1);
-
- return cmn;
-}
-
-
-void
-cmn(cmn_t *cmn, mfcc_t ** mfc, int32 varnorm, int32 n_frame)
-{
- mfcc_t *mfcp;
- mfcc_t t;
- int32 i, f;
- int32 n_pos_frame;
-
- assert(mfc != NULL);
-
- if (n_frame <= 0)
- return;
-
- /* If cmn->cmn_mean wasn't NULL, we need to zero the contents */
- memset(cmn->cmn_mean, 0, cmn->veclen * sizeof(mfcc_t));
-
- /* Find mean cep vector for this utterance */
- for (f = 0, n_pos_frame = 0; f < n_frame; f++) {
- mfcp = mfc[f];
-
- /* Skip zero energy frames */
- if (mfcp[0] < 0)
- continue;
-
- for (i = 0; i < cmn->veclen; i++) {
- cmn->cmn_mean[i] += mfcp[i];
- }
-
- n_pos_frame++;
- }
-
- for (i = 0; i < cmn->veclen; i++)
- cmn->cmn_mean[i] /= n_pos_frame;
-
- E_INFO("CMN: ");
- for (i = 0; i < cmn->veclen; i++)
- E_INFOCONT("%5.2f ", MFCC2FLOAT(cmn->cmn_mean[i]));
- E_INFOCONT("\n");
- if (!varnorm) {
- /* Subtract mean from each cep vector */
- for (f = 0; f < n_frame; f++) {
- mfcp = mfc[f];
- for (i = 0; i < cmn->veclen; i++)
- mfcp[i] -= cmn->cmn_mean[i];
- }
- }
- else {
- /* Scale cep vectors to have unit variance along each dimension, and subtract means */
- /* If cmn->cmn_var wasn't NULL, we need to zero the contents */
- memset(cmn->cmn_var, 0, cmn->veclen * sizeof(mfcc_t));
-
- for (f = 0; f < n_frame; f++) {
- mfcp = mfc[f];
-
- for (i = 0; i < cmn->veclen; i++) {
- t = mfcp[i] - cmn->cmn_mean[i];
- cmn->cmn_var[i] += MFCCMUL(t, t);
- }
- }
- for (i = 0; i < cmn->veclen; i++)
- /* Inverse Std. Dev, RAH added type case from sqrt */
- cmn->cmn_var[i] = FLOAT2MFCC(sqrt((float64)n_frame / MFCC2FLOAT(cmn->cmn_var[i])));
-
- for (f = 0; f < n_frame; f++) {
- mfcp = mfc[f];
- for (i = 0; i < cmn->veclen; i++)
- mfcp[i] = MFCCMUL((mfcp[i] - cmn->cmn_mean[i]), cmn->cmn_var[i]);
- }
- }
-}
-
-/*
- * RAH, free previously allocated memory
- */
-void
-cmn_free(cmn_t * cmn)
-{
- if (cmn != NULL) {
- if (cmn->cmn_var)
- ckd_free((void *) cmn->cmn_var);
-
- if (cmn->cmn_mean)
- ckd_free((void *) cmn->cmn_mean);
-
- if (cmn->sum)
- ckd_free((void *) cmn->sum);
-
- ckd_free((void *) cmn);
- }
-}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-11 15:44:03 +0000