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<a href="agc_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/* ====================================================================</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 1999-2004 Carnegie Mellon University. All rights</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modification, are permitted provided that the following conditions</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * notice, this list of conditions and the following disclaimer. </span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * notice, this list of conditions and the following disclaimer in</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * the documentation and/or other materials provided with the</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * distribution.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * ====================================================================</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * agc.h -- Various forms of automatic gain control (AGC)</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * **********************************************</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * CMU ARPA Speech Project</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * Copyright (c) 1999 Carnegie Mellon University.</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * ALL RIGHTS RESERVED.</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * **********************************************</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * HISTORY</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * $Log$</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * Revision 1.1 2006/04/05 20:27:30 dhdfu</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * A Great Reorganzation of header files and executables</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * Revision 1.8 2005/06/21 19:25:41 arthchan2003</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * 1, Fixed doxygen documentation. 2, Added $ keyword.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * Revision 1.4 2005/06/13 04:02:56 archan</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * Fixed most doxygen-style documentation under libs3decoder.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * Revision 1.3 2005/03/30 01:22:46 archan</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * Fixed mistakes in last updates. Add</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * 28-Apr-1999 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * Copied from previous version.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#ifndef _S3_AGC_H_</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define _S3_AGC_H_</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">/* Win32/WinCE DLL gunk */</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#include <sphinxbase/sphinxbase_export.h></span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#include <<a class="code" href="prim__type_8h.html">sphinxbase/prim_type.h</a>></span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#include <sphinxbase/fe.h></span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#if 0</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">/* Fool Emacs. */</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="agc_8h.html#aef1d2c7e32d37aa84d70c2f3675fc923"> 95</a></span> <span class="keyword">typedef</span> <span class="keyword">enum</span> <a class="code" href="agc_8h.html#aef1d2c7e32d37aa84d70c2f3675fc923">agc_type_e</a> {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  AGC_NONE = 0,</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  AGC_MAX,</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  AGC_EMAX,</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  AGC_NOISE</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> } <a class="code" href="agc_8h.html#a5524df49e0425cc6b1c002bc704a8103">agc_type_t</a>;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <a class="code" href="agc_8h.html#a5524df49e0425cc6b1c002bc704a8103">agc_type_t</a> <a class="code" href="agc_8h.html#aebd0689591488378192e13f6d2646bc1">agc_type_from_str</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *str);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="agc_8h.html#a6ea1b2b3d482cf08eb36084629503c80">agc_type_str</a>[];</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="structagc__s.html"> 113</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structagc__s.html">agc_s</a> {</div>
<div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="structagc__s.html#a6a55c54c76a2e0373a907d186b89fa8e"> 114</a></span>  mfcc_t <a class="code" href="structagc__s.html#a6a55c54c76a2e0373a907d186b89fa8e">max</a>; </div>
<div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="structagc__s.html#a20c5289a6328895101e89cc3b418a1e4"> 115</a></span>  mfcc_t <a class="code" href="structagc__s.html#a20c5289a6328895101e89cc3b418a1e4">obs_max</a>; </div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="structagc__s.html#a5a6c2e967089085bd4f6020876bcb92a"> 116</a></span>  int32 <a class="code" href="structagc__s.html#a5a6c2e967089085bd4f6020876bcb92a">obs_frame</a>; </div>
<div class="line"><a name="l00117"></a><span class="lineno"><a class="line" href="structagc__s.html#ae4ce95dcfb26c7f14ea316ac3ab202b2"> 117</a></span>  int32 <a class="code" href="structagc__s.html#ae4ce95dcfb26c7f14ea316ac3ab202b2">obs_utt</a>; </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  mfcc_t obs_max_sum;</div>
<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="structagc__s.html#a4c896e65da00c79b77b23272474fcffc"> 119</a></span>  mfcc_t <a class="code" href="structagc__s.html#a4c896e65da00c79b77b23272474fcffc">noise_thresh</a>; </div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> } <a class="code" href="agc_8h.html#a4998d40c67716fdea6791f8070642dc5">agc_t</a>;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <a class="code" href="structagc__s.html">agc_t</a> *<a class="code" href="agc_8h.html#a5c7ee7b19f8dcfd0c28b4dc76a283dc7">agc_init</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#a6a050fc4b079be05b1946636d5d7f3aa">agc_free</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#a29a2a4dd80141af1c3476094c353b739">agc_max</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc, </div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  mfcc_t **mfc, </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  int32 n_frame </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  );</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#ac2cdd4c519b46824c5b28c5b769b5ecd">agc_emax</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc, </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  mfcc_t **mfc, </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  int32 n_frame </div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  );</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#af47b6004f2f963ae0019a67450b892c2">agc_emax_update</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc </div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  );</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> float32 <a class="code" href="agc_8h.html#a7b439fb5d36250d09bb9d459c1e28ba5">agc_emax_get</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc);</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#a4fd17f224b5d8f7bfcaa9389d11716eb">agc_emax_set</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc, float32 m);</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#ae65d4be1d74aea11b7e16e3777272d13">agc_noise</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc, </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  mfcc_t **mfc, </div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  int32 n_frame </div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  );</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> float32 <a class="code" href="agc_8h.html#a77d0987174a1b3c6e8fcd63fe82f33ce">agc_get_threshold</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> SPHINXBASE_EXPORT</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="keywordtype">void</span> <a class="code" href="agc_8h.html#aaaa9e15f192c91ad64c343b7c6db6714">agc_set_threshold</a>(<a class="code" href="structagc__s.html">agc_t</a> *agc, float32 threshold);</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> }</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#endif</span></div>
<div class="ttc" id="agc_8h_html_a77d0987174a1b3c6e8fcd63fe82f33ce"><div class="ttname"><a href="agc_8h.html#a77d0987174a1b3c6e8fcd63fe82f33ce">agc_get_threshold</a></div><div class="ttdeci">SPHINXBASE_EXPORT float32 agc_get_threshold(agc_t *agc)</div><div class="ttdoc">Get the current AGC noise threshold. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00222">agc.c:222</a></div></div>
<div class="ttc" id="agc_8h_html_ae65d4be1d74aea11b7e16e3777272d13"><div class="ttname"><a href="agc_8h.html#ae65d4be1d74aea11b7e16e3777272d13">agc_noise</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_noise(agc_t *agc, mfcc_t **mfc, int32 n_frame)</div><div class="ttdoc">Apply AGC using noise threshold to the given block of MFC vectors. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00180">agc.c:180</a></div></div>
<div class="ttc" id="structagc__s_html_a6a55c54c76a2e0373a907d186b89fa8e"><div class="ttname"><a href="structagc__s.html#a6a55c54c76a2e0373a907d186b89fa8e">agc_s::max</a></div><div class="ttdeci">mfcc_t max</div><div class="ttdoc">Estimated max for current utterance (for AGC_EMAX) </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00114">agc.h:114</a></div></div>
<div class="ttc" id="agc_8h_html_a29a2a4dd80141af1c3476094c353b739"><div class="ttname"><a href="agc_8h.html#a29a2a4dd80141af1c3476094c353b739">agc_max</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_max(agc_t *agc, mfcc_t **mfc, int32 n_frame)</div><div class="ttdoc">Apply AGC to the given mfc vectors (normalize all C0 mfc coefficients in the given input such that th...</div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00109">agc.c:109</a></div></div>
<div class="ttc" id="agc_8h_html_a6ea1b2b3d482cf08eb36084629503c80"><div class="ttname"><a href="agc_8h.html#a6ea1b2b3d482cf08eb36084629503c80">agc_type_str</a></div><div class="ttdeci">SPHINXBASE_EXPORT const char * agc_type_str[]</div><div class="ttdoc">String representations of agc_type_t values. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00070">agc.c:70</a></div></div>
<div class="ttc" id="structagc__s_html_a20c5289a6328895101e89cc3b418a1e4"><div class="ttname"><a href="structagc__s.html#a20c5289a6328895101e89cc3b418a1e4">agc_s::obs_max</a></div><div class="ttdeci">mfcc_t obs_max</div><div class="ttdoc">Observed max in current utterance. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00115">agc.h:115</a></div></div>
<div class="ttc" id="structagc__s_html_a5a6c2e967089085bd4f6020876bcb92a"><div class="ttname"><a href="structagc__s.html#a5a6c2e967089085bd4f6020876bcb92a">agc_s::obs_frame</a></div><div class="ttdeci">int32 obs_frame</div><div class="ttdoc">Whether any data was observed after prev update. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00116">agc.h:116</a></div></div>
<div class="ttc" id="prim__type_8h_html"><div class="ttname"><a href="prim__type_8h.html">prim_type.h</a></div><div class="ttdoc">Basic type definitions used in Sphinx. </div></div>
<div class="ttc" id="agc_8h_html_a5c7ee7b19f8dcfd0c28b4dc76a283dc7"><div class="ttname"><a href="agc_8h.html#a5c7ee7b19f8dcfd0c28b4dc76a283dc7">agc_init</a></div><div class="ttdeci">SPHINXBASE_EXPORT agc_t * agc_init(void)</div><div class="ttdoc">Initialize AGC structure with default values. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00091">agc.c:91</a></div></div>
<div class="ttc" id="agc_8h_html_a6a050fc4b079be05b1946636d5d7f3aa"><div class="ttname"><a href="agc_8h.html#a6a050fc4b079be05b1946636d5d7f3aa">agc_free</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_free(agc_t *agc)</div><div class="ttdoc">Free AGC structure. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00100">agc.c:100</a></div></div>
<div class="ttc" id="agc_8h_html_a5524df49e0425cc6b1c002bc704a8103"><div class="ttname"><a href="agc_8h.html#a5524df49e0425cc6b1c002bc704a8103">agc_type_t</a></div><div class="ttdeci">enum agc_type_e agc_type_t</div><div class="ttdoc">Types of acoustic gain control to apply to the features. </div></div>
<div class="ttc" id="structagc__s_html_ae4ce95dcfb26c7f14ea316ac3ab202b2"><div class="ttname"><a href="structagc__s.html#ae4ce95dcfb26c7f14ea316ac3ab202b2">agc_s::obs_utt</a></div><div class="ttdeci">int32 obs_utt</div><div class="ttdoc">Whether any utterances have been observed. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00117">agc.h:117</a></div></div>
<div class="ttc" id="agc_8h_html_aaaa9e15f192c91ad64c343b7c6db6714"><div class="ttname"><a href="agc_8h.html#aaaa9e15f192c91ad64c343b7c6db6714">agc_set_threshold</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_set_threshold(agc_t *agc, float32 threshold)</div><div class="ttdoc">Set the current AGC noise threshold. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00216">agc.c:216</a></div></div>
<div class="ttc" id="structagc__s_html_a4c896e65da00c79b77b23272474fcffc"><div class="ttname"><a href="structagc__s.html#a4c896e65da00c79b77b23272474fcffc">agc_s::noise_thresh</a></div><div class="ttdeci">mfcc_t noise_thresh</div><div class="ttdoc">Noise threshold (for AGC_NOISE only) </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00119">agc.h:119</a></div></div>
<div class="ttc" id="agc_8h_html_a4fd17f224b5d8f7bfcaa9389d11716eb"><div class="ttname"><a href="agc_8h.html#a4fd17f224b5d8f7bfcaa9389d11716eb">agc_emax_set</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_emax_set(agc_t *agc, float32 m)</div><div class="ttdoc">Set the current AGC maximum estimate. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00129">agc.c:129</a></div></div>
<div class="ttc" id="agc_8h_html_a4998d40c67716fdea6791f8070642dc5"><div class="ttname"><a href="agc_8h.html#a4998d40c67716fdea6791f8070642dc5">agc_t</a></div><div class="ttdeci">struct agc_s agc_t</div><div class="ttdoc">Structure holding data for doing AGC. </div></div>
<div class="ttc" id="structagc__s_html"><div class="ttname"><a href="structagc__s.html">agc_s</a></div><div class="ttdoc">Structure holding data for doing AGC. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00113">agc.h:113</a></div></div>
<div class="ttc" id="agc_8h_html_af47b6004f2f963ae0019a67450b892c2"><div class="ttname"><a href="agc_8h.html#af47b6004f2f963ae0019a67450b892c2">agc_emax_update</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_emax_update(agc_t *agc)</div><div class="ttdoc">Update AGC parameters for next utterance. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00159">agc.c:159</a></div></div>
<div class="ttc" id="agc_8h_html_ac2cdd4c519b46824c5b28c5b769b5ecd"><div class="ttname"><a href="agc_8h.html#ac2cdd4c519b46824c5b28c5b769b5ecd">agc_emax</a></div><div class="ttdeci">SPHINXBASE_EXPORT void agc_emax(agc_t *agc, mfcc_t **mfc, int32 n_frame)</div><div class="ttdoc">Apply AGC to the given block of MFC vectors. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00142">agc.c:142</a></div></div>
<div class="ttc" id="agc_8h_html_aef1d2c7e32d37aa84d70c2f3675fc923"><div class="ttname"><a href="agc_8h.html#aef1d2c7e32d37aa84d70c2f3675fc923">agc_type_e</a></div><div class="ttdeci">agc_type_e</div><div class="ttdoc">Types of acoustic gain control to apply to the features. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8h_source.html#l00095">agc.h:95</a></div></div>
<div class="ttc" id="agc_8h_html_a7b439fb5d36250d09bb9d459c1e28ba5"><div class="ttname"><a href="agc_8h.html#a7b439fb5d36250d09bb9d459c1e28ba5">agc_emax_get</a></div><div class="ttdeci">SPHINXBASE_EXPORT float32 agc_emax_get(agc_t *agc)</div><div class="ttdoc">Get the current AGC maximum estimate. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00136">agc.c:136</a></div></div>
<div class="ttc" id="agc_8h_html_aebd0689591488378192e13f6d2646bc1"><div class="ttname"><a href="agc_8h.html#aebd0689591488378192e13f6d2646bc1">agc_type_from_str</a></div><div class="ttdeci">SPHINXBASE_EXPORT agc_type_t agc_type_from_str(const char *str)</div><div class="ttdoc">Convert string representation (from command-line) to agc_type_t. </div><div class="ttdef"><b>Definition:</b> <a href="agc_8c_source.html#l00079">agc.c:79</a></div></div>
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