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sphinxbase-devel-0.7-1.fc14.i686.rpm

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<h1>include/sphinxbase/agc.h</h1>  </div>
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<a href="agc_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/* ====================================================================</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 1999-2004 Carnegie Mellon University.  All rights</span>
<a name="l00004"></a>00004 <span class="comment"> * reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00008"></a>00008 <span class="comment"> * are met:</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> *    notice, this list of conditions and the following disclaimer. </span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> *    notice, this list of conditions and the following disclaimer in</span>
<a name="l00015"></a>00015 <span class="comment"> *    the documentation and/or other materials provided with the</span>
<a name="l00016"></a>00016 <span class="comment"> *    distribution.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span>
<a name="l00019"></a>00019 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span>
<a name="l00020"></a>00020 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS&#39;&#39; AND </span>
<a name="l00023"></a>00023 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span>
<a name="l00024"></a>00024 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00025"></a>00025 <span class="comment"> * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span>
<a name="l00026"></a>00026 <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span>
<a name="l00028"></a>00028 <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span>
<a name="l00029"></a>00029 <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span>
<a name="l00030"></a>00030 <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span>
<a name="l00031"></a>00031 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span>
<a name="l00032"></a>00032 <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</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 <span class="comment"> */</span>
<a name="l00037"></a>00037 <span class="comment">/*</span>
<a name="l00038"></a>00038 <span class="comment"> * agc.h -- Various forms of automatic gain control (AGC)</span>
<a name="l00039"></a>00039 <span class="comment"> * </span>
<a name="l00040"></a>00040 <span class="comment"> * **********************************************</span>
<a name="l00041"></a>00041 <span class="comment"> * CMU ARPA Speech Project</span>
<a name="l00042"></a>00042 <span class="comment"> *</span>
<a name="l00043"></a>00043 <span class="comment"> * Copyright (c) 1999 Carnegie Mellon University.</span>
<a name="l00044"></a>00044 <span class="comment"> * ALL RIGHTS RESERVED.</span>
<a name="l00045"></a>00045 <span class="comment"> * **********************************************</span>
<a name="l00046"></a>00046 <span class="comment"> * </span>
<a name="l00047"></a>00047 <span class="comment"> * HISTORY</span>
<a name="l00048"></a>00048 <span class="comment"> * $Log$</span>
<a name="l00049"></a>00049 <span class="comment"> * Revision 1.1  2006/04/05  20:27:30  dhdfu</span>
<a name="l00050"></a>00050 <span class="comment"> * A Great Reorganzation of header files and executables</span>
<a name="l00051"></a>00051 <span class="comment"> * </span>
<a name="l00052"></a>00052 <span class="comment"> * Revision 1.8  2005/06/21 19:25:41  arthchan2003</span>
<a name="l00053"></a>00053 <span class="comment"> * 1, Fixed doxygen documentation. 2, Added $ keyword.</span>
<a name="l00054"></a>00054 <span class="comment"> *</span>
<a name="l00055"></a>00055 <span class="comment"> * Revision 1.4  2005/06/13 04:02:56  archan</span>
<a name="l00056"></a>00056 <span class="comment"> * Fixed most doxygen-style documentation under libs3decoder.</span>
<a name="l00057"></a>00057 <span class="comment"> *</span>
<a name="l00058"></a>00058 <span class="comment"> * Revision 1.3  2005/03/30 01:22:46  archan</span>
<a name="l00059"></a>00059 <span class="comment"> * Fixed mistakes in last updates. Add</span>
<a name="l00060"></a>00060 <span class="comment"> *</span>
<a name="l00061"></a>00061 <span class="comment"> * </span>
<a name="l00062"></a>00062 <span class="comment"> * 28-Apr-1999  M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00063"></a>00063 <span class="comment"> *              Copied from previous version.</span>
<a name="l00064"></a>00064 <span class="comment"> */</span>
<a name="l00065"></a>00065 
<a name="l00066"></a>00066 
<a name="l00067"></a>00067 <span class="preprocessor">#ifndef _S3_AGC_H_</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span><span class="preprocessor">#define _S3_AGC_H_</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span>
<a name="l00070"></a>00070 <span class="comment">/* Win32/WinCE DLL gunk */</span>
<a name="l00071"></a>00071 <span class="preprocessor">#include &lt;sphinxbase/sphinxbase_export.h&gt;</span>
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="preprocessor">#include &lt;sphinxbase/prim_type.h&gt;</span>
<a name="l00074"></a>00074 <span class="preprocessor">#include &lt;sphinxbase/fe.h&gt;</span>
<a name="l00075"></a>00075 
<a name="l00084"></a>00084 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00085"></a>00085 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">&quot;C&quot;</span> {
<a name="l00086"></a>00086 <span class="preprocessor">#endif</span>
<a name="l00087"></a>00087 <span class="preprocessor"></span><span class="preprocessor">#if 0</span>
<a name="l00088"></a>00088 <span class="preprocessor"></span><span class="comment">/* Fool Emacs. */</span>
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090 <span class="preprocessor">#endif</span>
<a name="l00091"></a>00091 <span class="preprocessor"></span>
<a name="l00095"></a><a class="code" href="agc_8h.html#aef1d2c7e32d37aa84d70c2f3675fc923">00095</a> <span class="keyword">typedef</span> <span class="keyword">enum</span> <a class="code" href="agc_8h.html#aef1d2c7e32d37aa84d70c2f3675fc923" title="Types of acoustic gain control to apply to the features.">agc_type_e</a> {
<a name="l00096"></a>00096     AGC_NONE = 0,
<a name="l00097"></a>00097     AGC_MAX,
<a name="l00098"></a>00098     AGC_EMAX,
<a name="l00099"></a>00099     AGC_NOISE
<a name="l00100"></a>00100 } <a class="code" href="agc_8h.html#a5524df49e0425cc6b1c002bc704a8103" title="Types of acoustic gain control to apply to the features.">agc_type_t</a>;
<a name="l00101"></a>00101 
<a name="l00103"></a>00103 SPHINXBASE_EXPORT
<a name="l00104"></a>00104 <a class="code" href="agc_8h.html#a5524df49e0425cc6b1c002bc704a8103" title="Types of acoustic gain control to apply to the features.">agc_type_t</a> <a class="code" href="agc_8h.html#aebd0689591488378192e13f6d2646bc1" title="Convert string representation (from command-line) to agc_type_t.">agc_type_from_str</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *str);
<a name="l00105"></a>00105 
<a name="l00107"></a>00107 SPHINXBASE_EXPORT
<a name="l00108"></a>00108 <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="agc_8h.html#a6ea1b2b3d482cf08eb36084629503c80" title="String representations of agc_type_t values.">agc_type_str</a>[];
<a name="l00109"></a>00109 
<a name="l00113"></a><a class="code" href="structagc__s.html">00113</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_s</a> {
<a name="l00114"></a><a class="code" href="structagc__s.html#a6a55c54c76a2e0373a907d186b89fa8e">00114</a>     mfcc_t <a class="code" href="structagc__s.html#a6a55c54c76a2e0373a907d186b89fa8e" title="Estimated max for current utterance (for AGC_EMAX)">max</a>;      
<a name="l00115"></a><a class="code" href="structagc__s.html#a20c5289a6328895101e89cc3b418a1e4">00115</a>     mfcc_t <a class="code" href="structagc__s.html#a20c5289a6328895101e89cc3b418a1e4" title="Observed max in current utterance.">obs_max</a>;  
<a name="l00116"></a><a class="code" href="structagc__s.html#a5a6c2e967089085bd4f6020876bcb92a">00116</a>     int32 <a class="code" href="structagc__s.html#a5a6c2e967089085bd4f6020876bcb92a" title="Whether any data was observed after prev update.">obs_frame</a>; 
<a name="l00117"></a><a class="code" href="structagc__s.html#ae4ce95dcfb26c7f14ea316ac3ab202b2">00117</a>     int32 <a class="code" href="structagc__s.html#ae4ce95dcfb26c7f14ea316ac3ab202b2" title="Whether any utterances have been observed.">obs_utt</a>;   
<a name="l00118"></a>00118     mfcc_t obs_max_sum;
<a name="l00119"></a><a class="code" href="structagc__s.html#a4c896e65da00c79b77b23272474fcffc">00119</a>     mfcc_t <a class="code" href="structagc__s.html#a4c896e65da00c79b77b23272474fcffc" title="Noise threshold (for AGC_NOISE only)">noise_thresh</a>; 
<a name="l00120"></a>00120 } <a class="code" href="agc_8h.html#a4998d40c67716fdea6791f8070642dc5" title="Structure holding data for doing AGC.">agc_t</a>;
<a name="l00121"></a>00121 
<a name="l00125"></a>00125 SPHINXBASE_EXPORT
<a name="l00126"></a>00126 <a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *<a class="code" href="agc_8h.html#a5c7ee7b19f8dcfd0c28b4dc76a283dc7" title="Initialize AGC structure with default values.">agc_init</a>(<span class="keywordtype">void</span>);
<a name="l00127"></a>00127 
<a name="l00131"></a>00131 SPHINXBASE_EXPORT
<a name="l00132"></a>00132 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#a6a050fc4b079be05b1946636d5d7f3aa" title="Free AGC structure.">agc_free</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc);
<a name="l00133"></a>00133 
<a name="l00140"></a>00140 SPHINXBASE_EXPORT
<a name="l00141"></a>00141 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#a29a2a4dd80141af1c3476094c353b739" title="Apply AGC to the given mfc vectors (normalize all C0 mfc coefficients in the given input such that th...">agc_max</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc,        
<a name="l00142"></a>00142              mfcc_t **mfc,      
<a name="l00143"></a>00143              int32 n_frame      
<a name="l00144"></a>00144     );
<a name="l00145"></a>00145 
<a name="l00151"></a>00151 SPHINXBASE_EXPORT
<a name="l00152"></a>00152 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#ac2cdd4c519b46824c5b28c5b769b5ecd" title="Apply AGC to the given block of MFC vectors.">agc_emax</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc,       
<a name="l00153"></a>00153               mfcc_t **mfc,     
<a name="l00154"></a>00154               int32 n_frame     
<a name="l00155"></a>00155     );
<a name="l00156"></a>00156 
<a name="l00160"></a>00160 SPHINXBASE_EXPORT
<a name="l00161"></a>00161 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#af47b6004f2f963ae0019a67450b892c2" title="Update AGC parameters for next utterance.">agc_emax_update</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc 
<a name="l00162"></a>00162     );
<a name="l00163"></a>00163 
<a name="l00167"></a>00167 SPHINXBASE_EXPORT
<a name="l00168"></a>00168 float32 <a class="code" href="agc_8h.html#a7b439fb5d36250d09bb9d459c1e28ba5" title="Get the current AGC maximum estimate.">agc_emax_get</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc);
<a name="l00169"></a>00169 
<a name="l00173"></a>00173 SPHINXBASE_EXPORT
<a name="l00174"></a>00174 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#a4fd17f224b5d8f7bfcaa9389d11716eb" title="Set the current AGC maximum estimate.">agc_emax_set</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc, float32 m);
<a name="l00175"></a>00175 
<a name="l00179"></a>00179 SPHINXBASE_EXPORT
<a name="l00180"></a>00180 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#ae65d4be1d74aea11b7e16e3777272d13" title="Apply AGC using noise threshold to the given block of MFC vectors.">agc_noise</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc,      
<a name="l00181"></a>00181                mfcc_t **mfc,    
<a name="l00182"></a>00182                int32 n_frame    
<a name="l00183"></a>00183     );
<a name="l00184"></a>00184 
<a name="l00188"></a>00188 SPHINXBASE_EXPORT
<a name="l00189"></a>00189 float32 <a class="code" href="agc_8h.html#a77d0987174a1b3c6e8fcd63fe82f33ce" title="Get the current AGC noise threshold.">agc_get_threshold</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc);
<a name="l00190"></a>00190 
<a name="l00194"></a>00194 SPHINXBASE_EXPORT
<a name="l00195"></a>00195 <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#aaaa9e15f192c91ad64c343b7c6db6714" title="Set the current AGC noise threshold.">agc_set_threshold</a>(<a class="code" href="structagc__s.html" title="Structure holding data for doing AGC.">agc_t</a> *agc, float32 threshold);
<a name="l00196"></a>00196 
<a name="l00197"></a>00197 
<a name="l00198"></a>00198 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00199"></a>00199 <span class="preprocessor"></span>}
<a name="l00200"></a>00200 <span class="preprocessor">#endif</span>
<a name="l00201"></a>00201 <span class="preprocessor"></span>
<a name="l00202"></a>00202 <span class="preprocessor">#endif</span>
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