/usr/include/sphinxbase/cmn.h is in libsphinxbase-dev 0.4.1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | /* -*- 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.h -- Various forms of cepstral mean normalization
*
* **********************************************
* CMU ARPA Speech Project
*
* Copyright (c) 1999 Carnegie Mellon University.
* ALL RIGHTS RESERVED.
* **********************************************
*
* HISTORY
* $Log$
* Revision 1.1 2006/04/05 20:27:30 dhdfu
* A Great Reorganzation of header files and executables
*
* Revision 1.13 2006/02/23 03:48:27 arthchan2003
* Resolved conflict in cmn.h
*
*
* Revision 1.12 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 1.11.4.2 2005/10/17 04:45:57 arthchan2003
* Free stuffs in cmn and feat corectly.
*
* Revision 1.11.4.1 2005/07/05 06:25:08 arthchan2003
* Fixed dox-doc.
*
* Revision 1.11 2005/06/21 19:28:00 arthchan2003
* 1, Fixed doxygen documentation. 2, Added $ keyword.
*
* Revision 1.4 2005/06/13 04:02:56 archan
* Fixed most doxygen-style documentation under libs3decoder.
*
* 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
* Copied from previous version.
*/
#ifndef _S3_CMN_H_
#define _S3_CMN_H_
/* Win32/WinCE DLL gunk */
#include <sphinxbase_export.h>
#include <prim_type.h>
#include <fe.h>
#ifdef __cplusplus
extern "C" {
#endif
#if 0
/* Fool Emacs. */
}
#endif
/** \file cmn.h
* \brief Apply Cepstral Mean Normalization (CMN) to the set of input mfc frames.
*
* By subtractingthe mean of the input from each frame. C0 is also included in this process.
* This function operates on an entire utterance at a time. Hence, the entire utterance
* must be available beforehand (batchmode).
*/
/**
* Types of cepstral mean normalization to apply to the features.
*/
typedef enum cmn_type_e {
CMN_NONE = 0,
CMN_CURRENT,
CMN_PRIOR
} cmn_type_t;
/** String representations of cmn_type_t values. */
SPHINXBASE_EXPORT
extern const char *cmn_type_str[];
/** Convert string representation (from command-line) to cmn_type_t */
SPHINXBASE_EXPORT
cmn_type_t cmn_type_from_str(const char *str);
/** \struct cmn_t
* \brief wrapper of operation of the cepstral mean normalization.
*/
typedef struct {
mfcc_t *cmn_mean; /**< Temporary variable: current means */
mfcc_t *cmn_var; /**< Temporary variables: stored the cmn variance */
mfcc_t *sum; /**< The sum of the cmn frames */
int32 nframe; /**< Number of frames */
int32 veclen; /**< Length of cepstral vector */
} cmn_t;
SPHINXBASE_EXPORT
cmn_t* cmn_init(int32 veclen);
/**
* CMN for the whole sentence
*/
SPHINXBASE_EXPORT
void cmn (cmn_t *cmn, /**< In/Out: cmn normalization, which contains the cmn_mean and cmn_var) */
mfcc_t **mfc, /**< In/Out: mfc[f] = mfc vector in frame f */
int32 varnorm,/**< In: if not FALSE, variance normalize the input vectors
to have unit variance (along each dimension independently);
Irrelevant if no cmn is performed */
int32 n_frame /**< In: Number of frames of mfc vectors */
);
#define CMN_WIN_HWM 800 /* #frames after which window shifted */
#define CMN_WIN 500
/**
* CMN for one block of data, using prior mean
*/
SPHINXBASE_EXPORT
void cmn_prior(cmn_t *cmn, /**< In/Out: cmn normalization, which contains
the cmn_mean and cmn_var) */
mfcc_t **incep, /**< In/Out: mfc[f] = mfc vector in frame f*/
int32 varnorm, /**< This flag should always be 0 for live */
int32 nfr /**< Number of incoming frames */
);
/**
* Update prior mean based on observed data
*/
SPHINXBASE_EXPORT
void cmn_prior_update(cmn_t *cmn);
/**
* Set the prior mean.
*/
SPHINXBASE_EXPORT
void cmn_prior_set(cmn_t *cmn, mfcc_t const *vec);
/**
* Get the prior mean.
*/
SPHINXBASE_EXPORT
void cmn_prior_get(cmn_t *cmn, mfcc_t *vec);
/* RAH, free previously allocated memory */
SPHINXBASE_EXPORT
void cmn_free (cmn_t *cmn);
#ifdef __cplusplus
}
#endif
#endif
|