<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>SphinxBase: src/libsphinxbase/fe/fe_warp.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.7.3 --> <div id="top"> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">SphinxBase <span id="projectnumber">0.6</span></div> </td> </tr> </tbody> </table> </div> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="annotated.html"><span>Data Structures</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>Globals</span></a></li> </ul> </div> </div> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> initNavTree('fe__warp_8h.html',''); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <h1>src/libsphinxbase/fe/fe_warp.h</h1> </div> </div> <div class="contents"> <div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* ====================================================================</span> <a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2006 Carnegie Mellon University. All rights </span> <a name="l00003"></a>00003 <span class="comment"> * reserved.</span> <a name="l00004"></a>00004 <span class="comment"> *</span> <a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span> <a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions</span> <a name="l00007"></a>00007 <span class="comment"> * are met:</span> <a name="l00008"></a>00008 <span class="comment"> *</span> <a name="l00009"></a>00009 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span> <a name="l00010"></a>00010 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span> <a name="l00011"></a>00011 <span class="comment"> *</span> <a name="l00012"></a>00012 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span> <a name="l00013"></a>00013 <span class="comment"> * notice, this list of conditions and the following disclaimer in</span> <a name="l00014"></a>00014 <span class="comment"> * the documentation and/or other materials provided with the</span> <a name="l00015"></a>00015 <span class="comment"> * distribution.</span> <a name="l00016"></a>00016 <span class="comment"> *</span> <a name="l00017"></a>00017 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span> <a name="l00018"></a>00018 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span> <a name="l00019"></a>00019 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span> <a name="l00020"></a>00020 <span class="comment"> *</span> <a name="l00021"></a>00021 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span> <a name="l00022"></a>00022 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span> <a name="l00023"></a>00023 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span> <a name="l00024"></a>00024 <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span> <a name="l00025"></a>00025 <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span> <a name="l00026"></a>00026 <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span> <a name="l00027"></a>00027 <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span> <a name="l00028"></a>00028 <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span> <a name="l00029"></a>00029 <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span> <a name="l00030"></a>00030 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span> <a name="l00031"></a>00031 <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span> <a name="l00032"></a>00032 <span class="comment"> *</span> <a name="l00033"></a>00033 <span class="comment"> * ====================================================================</span> <a name="l00034"></a>00034 <span class="comment"> *</span> <a name="l00035"></a>00035 <span class="comment"> */</span> <a name="l00036"></a>00036 <a name="l00037"></a>00037 <span class="preprocessor">#ifndef FE_WARP_H</span> <a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define FE_WARP_H</span> <a name="l00039"></a>00039 <span class="preprocessor"></span> <a name="l00040"></a>00040 <span class="preprocessor">#include "fe_internal.h"</span> <a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="preprocessor">#ifdef __cplusplus</span> <a name="l00043"></a>00043 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> { <a name="l00044"></a>00044 <span class="preprocessor">#endif</span> <a name="l00045"></a>00045 <span class="preprocessor"></span><span class="preprocessor">#if 0</span> <a name="l00046"></a>00046 <span class="preprocessor"></span><span class="comment">/* Fool Emacs. */</span> <a name="l00047"></a>00047 } <a name="l00048"></a>00048 <span class="preprocessor">#endif</span> <a name="l00049"></a>00049 <span class="preprocessor"></span> <a name="l00050"></a>00050 <span class="preprocessor">#define FE_WARP_ID_INVERSE_LINEAR 0</span> <a name="l00051"></a>00051 <span class="preprocessor"></span><span class="preprocessor">#define FE_WARP_ID_AFFINE 1</span> <a name="l00052"></a>00052 <span class="preprocessor"></span><span class="preprocessor">#define FE_WARP_ID_PIECEWISE_LINEAR 2</span> <a name="l00053"></a>00053 <span class="preprocessor"></span><span class="preprocessor">#define FE_WARP_ID_EIDE_GISH 3</span> <a name="l00054"></a>00054 <span class="preprocessor"></span><span class="preprocessor">#define FE_WARP_ID_MAX 2</span> <a name="l00055"></a>00055 <span class="preprocessor"></span><span class="preprocessor">#define FE_WARP_ID_NONE 0xffffffff</span> <a name="l00056"></a>00056 <span class="preprocessor"></span> <a name="l00057"></a><a class="code" href="structfe__warp__conf__t.html">00057</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{ <a name="l00058"></a>00058 void (*set_parameters)(<span class="keywordtype">char</span> <span class="keyword">const</span> *param_str, <span class="keywordtype">float</span> sampling_rate); <a name="l00059"></a>00059 <span class="keyword">const</span> <span class="keywordtype">char</span> * (*doc)(void); <a name="l00060"></a>00060 uint32 (*<span class="keywordtype">id</span>)(void); <a name="l00061"></a>00061 uint32 (*n_param)(void); <a name="l00062"></a>00062 float (*warped_to_unwarped)(<span class="keywordtype">float</span> nonlinear); <a name="l00063"></a>00063 float (*unwarped_to_warped)(<span class="keywordtype">float</span> linear); <a name="l00064"></a>00064 void (*print)(<span class="keyword">const</span> <span class="keywordtype">char</span> *label); <a name="l00065"></a>00065 } <a class="code" href="structfe__warp__conf__t.html">fe_warp_conf_t</a>; <a name="l00066"></a>00066 <a name="l00067"></a>00067 <span class="keywordtype">int</span> fe_warp_set(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel, <span class="keyword">const</span> <span class="keywordtype">char</span> *id_name); <a name="l00068"></a>00068 <a name="l00069"></a>00069 uint32 fe_warp_id(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel); <a name="l00070"></a>00070 <a name="l00071"></a>00071 <span class="keyword">const</span> <span class="keywordtype">char</span> * fe_warp_doc(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel); <a name="l00072"></a>00072 <a name="l00073"></a>00073 <span class="keywordtype">void</span> fe_warp_set_parameters(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel, <span class="keywordtype">char</span> <span class="keyword">const</span> *param_str, <span class="keywordtype">float</span> sampling_rate); <a name="l00074"></a>00074 <a name="l00075"></a>00075 uint32 fe_warp_n_param(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel); <a name="l00076"></a>00076 <a name="l00077"></a>00077 <span class="keywordtype">float</span> fe_warp_warped_to_unwarped(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel, <span class="keywordtype">float</span> nonlinear); <a name="l00078"></a>00078 <a name="l00079"></a>00079 <span class="keywordtype">float</span> fe_warp_unwarped_to_warped(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel, <span class="keywordtype">float</span> linear); <a name="l00080"></a>00080 <a name="l00081"></a>00081 <span class="keywordtype">void</span> fe_warp_print(<a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> *mel, <span class="keyword">const</span> <span class="keywordtype">char</span> *label); <a name="l00082"></a>00082 <a name="l00083"></a>00083 <span class="preprocessor">#define FE_WARP_NO_SIZE 0xffffffff</span> <a name="l00084"></a>00084 <span class="preprocessor"></span> <a name="l00085"></a>00085 <span class="preprocessor">#ifdef __cplusplus</span> <a name="l00086"></a>00086 <span class="preprocessor"></span>} <a name="l00087"></a>00087 <span class="preprocessor">#endif</span> <a name="l00088"></a>00088 <span class="preprocessor"></span> <a name="l00089"></a>00089 <a name="l00090"></a>00090 <span class="preprocessor">#endif </span><span class="comment">/* FE_WARP_H */</span> <a name="l00091"></a>00091 <a name="l00092"></a>00092 <span class="comment">/*</span> <a name="l00093"></a>00093 <span class="comment"> * Log record. Maintained by RCS.</span> <a name="l00094"></a>00094 <span class="comment"> *</span> <a name="l00095"></a>00095 <span class="comment"> * $Log: fe_warp.h,v $</span> <a name="l00096"></a>00096 <span class="comment"> * Revision 1.2 2006/02/17 00:31:34 egouvea</span> <a name="l00097"></a>00097 <span class="comment"> * Removed switch -melwarp. Changed the default for window length to</span> <a name="l00098"></a>00098 <span class="comment"> * 0.025625 from 0.256 (so that a window at 16kHz sampling rate has</span> <a name="l00099"></a>00099 <span class="comment"> * exactly 410 samples). Cleaned up include's. Replaced some E_FATAL()</span> <a name="l00100"></a>00100 <span class="comment"> * with E_WARN() and return.</span> <a name="l00101"></a>00101 <span class="comment"> *</span> <a name="l00102"></a>00102 <span class="comment"> * Revision 1.1 2006/02/16 00:18:26 egouvea</span> <a name="l00103"></a>00103 <span class="comment"> * Implemented flexible warping function. The user can specify at run</span> <a name="l00104"></a>00104 <span class="comment"> * time which of several shapes they want to use. Currently implemented</span> <a name="l00105"></a>00105 <span class="comment"> * are an affine function (y = ax + b), an inverse linear (y = a/x) and a</span> <a name="l00106"></a>00106 <span class="comment"> * piecewise linear (y = ax, up to a frequency F, and then it "breaks" so</span> <a name="l00107"></a>00107 <span class="comment"> * Nyquist frequency matches in both scales.</span> <a name="l00108"></a>00108 <span class="comment"> *</span> <a name="l00109"></a>00109 <span class="comment"> * Added two switches, -warp_type and -warp_params. The first specifies</span> <a name="l00110"></a>00110 <span class="comment"> * the type, which valid values:</span> <a name="l00111"></a>00111 <span class="comment"> *</span> <a name="l00112"></a>00112 <span class="comment"> * -inverse or inverse_linear</span> <a name="l00113"></a>00113 <span class="comment"> * -linear or affine</span> <a name="l00114"></a>00114 <span class="comment"> * -piecewise or piecewise_linear</span> <a name="l00115"></a>00115 <span class="comment"> *</span> <a name="l00116"></a>00116 <span class="comment"> * The inverse_linear is the same as implemented by EHT. The -mel_warp</span> <a name="l00117"></a>00117 <span class="comment"> * switch was kept for compatibility (maybe remove it in the</span> <a name="l00118"></a>00118 <span class="comment"> * future?). The code is compatible with EHT's changes: cepstra created</span> <a name="l00119"></a>00119 <span class="comment"> * from code after his changes should be the same as now. Scripts that</span> <a name="l00120"></a>00120 <span class="comment"> * worked with his changes should work now without changes. Tested a few</span> <a name="l00121"></a>00121 <span class="comment"> * cases, same results.</span> <a name="l00122"></a>00122 <span class="comment"> *</span> <a name="l00123"></a>00123 <span class="comment"> */</span> </pre></div></div> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><b>fe_warp.h</b> </li> <li class="footer">Generated on Tue Apr 19 2011 for SphinxBase by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </li> </ul> </div> </body> </html>