1/*---------------------------------------------------------------------------*
2 *  channorm.h  *
3 *                                                                           *
4 *  Copyright 2007, 2008 Nuance Communciations, Inc.                               *
5 *                                                                           *
6 *  Licensed under the Apache License, Version 2.0 (the 'License');          *
7 *  you may not use this file except in compliance with the License.         *
8 *                                                                           *
9 *  You may obtain a copy of the License at                                  *
10 *      http://www.apache.org/licenses/LICENSE-2.0                           *
11 *                                                                           *
12 *  Unless required by applicable law or agreed to in writing, software      *
13 *  distributed under the License is distributed on an 'AS IS' BASIS,        *
14 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
15 *  See the License for the specific language governing permissions and      *
16 *  limitations under the License.                                           *
17 *                                                                           *
18 *---------------------------------------------------------------------------*/
19
20
21
22
23#ifndef __channorm_h
24#define __channorm_h
25
26#ifdef SET_RCSID
27static const char channorm_h[] = "$Id: channorm.h,v 1.1.10.4 2007/08/31 17:44:52 dahan Exp $";
28#endif
29
30#include "all_defs.h"
31#include "hmm_type.h"
32#include "specnorm.h"
33
34
35typedef struct
36{
37  int dim;
38  int init[MAX_CHAN_DIM];              /*  Values located in the .CMN file */
39  int target[MAX_CHAN_DIM];            /*  Values located in the .TMN file */
40  int adjust[MAX_CHAN_DIM];
41  int adj_valid;
42  imeldata imelda_adjust[MAX_CHAN_DIM];
43}
44norm_info;
45
46norm_info *create_channel_normalization(void);
47void destroy_channel_normalization(norm_info *channorm);
48void apply_channel_normalization(norm_info *channorm, imeldata *fram,
49                                 int dimen);
50void apply_channel_normalization_in_imelda(norm_info *channorm,
51    imeldata *outframe,
52    imeldata *frame, int dimen);
53void estimate_normalization_parameters(norm_info *channorm,
54                                       spect_dist_info **chandata, int dimen);
55void setup_channel_normalization(norm_info *channorm,
56                                 spect_dist_info **chandata, int dimen,
57                                 int forget_factor);
58void clear_channel_normalization(spect_dist_info **chandata, int dimen);
59int load_channel_parameters(char *basename, norm_info *channorm);
60
61void setup_ambient_estimation(spect_dist_info **backchan, int dimen,
62                              int forget_factor);
63void clear_ambient_estimation(spect_dist_info **backchan, int dimen);
64
65
66#endif
67