mirror of
https://github.com/cmusphinx/sphinxtrain.git
synced 2026-06-16 13:14:30 +00:00
David Huggins-Daines
dc157d12e7
Note that most of it is not at all useful. We also had to use an older version than what's in PocketSphinx because SphinxTrain has different needs. Another reorganization will be done soon.
192 lines
6.0 KiB
C
192 lines
6.0 KiB
C
/* -*- 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/sphinxbase_export.h>
|
|
#include <sphinxbase/prim_type.h>
|
|
#include <sphinxbase/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_BATCH,
|
|
CMN_LIVE
|
|
} 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 live mean
|
|
*/
|
|
SPHINXBASE_EXPORT
|
|
void cmn_live(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 live mean based on observed data
|
|
*/
|
|
SPHINXBASE_EXPORT
|
|
void cmn_live_update(cmn_t *cmn);
|
|
|
|
/**
|
|
* Set the live mean.
|
|
*/
|
|
SPHINXBASE_EXPORT
|
|
void cmn_live_set(cmn_t *cmn, mfcc_t const *vec);
|
|
|
|
/**
|
|
* Get the live mean.
|
|
*/
|
|
SPHINXBASE_EXPORT
|
|
void cmn_live_get(cmn_t *cmn, mfcc_t *vec);
|
|
|
|
/* RAH, free previously allocated memory */
|
|
SPHINXBASE_EXPORT
|
|
void cmn_free (cmn_t *cmn);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|