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<h1>src/libpocketsphinx/ms_gauden.h File Reference</h1> </div>
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<div class="contents">
<p>(Sphinx 3.0 specific) Gaussian density module.
<a href="#_details">More...</a></p>
<div class="textblock"><code>#include <sphinxbase/feat.h></code><br/>
<code>#include <sphinxbase/logmath.h></code><br/>
<code>#include <sphinxbase/cmd_ln.h></code><br/>
<code>#include "vector.h"</code><br/>
<code>#include "<a class="el" href="pocketsphinx__internal_8h_source.html">pocketsphinx_internal.h</a>"</code><br/>
<code>#include "<a class="el" href="hmm_8h_source.html">hmm.h</a>"</code><br/>
</div>
<p><a href="ms__gauden_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structgauden__dist__t.html">gauden_dist_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Structure to store distance (density) values for a given input observation wrt density values in some given codebook. <a href="structgauden__dist__t.html#_details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structgauden__t.html">gauden_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Multivariate gaussian mixture density parameters. <a href="structgauden__t.html#_details">More...</a><br/></td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structgauden__t.html">gauden_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="ms__gauden_8h.html#ae4587b0aeb39fd926622a422969ecebc">gauden_init</a> (char const *meanfile, char const *varfile, float32 varfloor, logmath_t *lmath)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Read mixture gaussian codebooks from the given files. <a href="#ae4587b0aeb39fd926622a422969ecebc"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="ms__gauden_8h.html#a0306e088fa33894ca40182d2392ffe4d">gauden_free</a> (<a class="el" href="structgauden__t.html">gauden_t</a> *g)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Release memory allocated by gauden_init. <a href="#a0306e088fa33894ca40182d2392ffe4d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int32 </td><td class="memItemRight" valign="bottom"><a class="el" href="ms__gauden_8h.html#ab640722f2c2b1e8bc6e883d9b5b72494">gauden_mllr_transform</a> (<a class="el" href="structgauden__t.html">gauden_t</a> *s, <a class="el" href="structps__mllr__s.html">ps_mllr_t</a> *mllr, cmd_ln_t *config)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Transform Gaussians according to an MLLR matrix (or, eventually, more). <a href="#ab640722f2c2b1e8bc6e883d9b5b72494"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int32 </td><td class="memItemRight" valign="bottom"><a class="el" href="ms__gauden_8h.html#a68cd25af0a2faf05eacd17afd5407ea4">gauden_dist</a> (<a class="el" href="structgauden__t.html">gauden_t</a> *g, int mgau, int n_top, mfcc_t **obs, <a class="el" href="structgauden__dist__t.html">gauden_dist_t</a> **out_dist)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Compute gaussian density values for the given input observation vector wrt the specified mixture gaussian codebook (which may consist of several feature streams). <a href="#a68cd25af0a2faf05eacd17afd5407ea4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="ms__gauden_8h.html#a8efb2c45fd5ac2b34bbff067a15fe6f5">gauden_dump</a> (const <a class="el" href="structgauden__t.html">gauden_t</a> *g)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Dump the definitionn of Gaussian distribution. <a href="#a8efb2c45fd5ac2b34bbff067a15fe6f5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="ms__gauden_8h.html#a9489d75ad3dbdc2bb413b43a17f48188">gauden_dump_ind</a> (const <a class="el" href="structgauden__t.html">gauden_t</a> *g, int senidx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Dump the definition of Gaussian distribution of a particular index to the standard output stream. <a href="#a9489d75ad3dbdc2bb413b43a17f48188"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>(Sphinx 3.0 specific) Gaussian density module. </p>
<p>Gaussian density distribution implementation. There are two major difference bettwen ms_gauden and cont_mgau. One is the fact that ms_gauden only take cares of the Gaussian computation part where cont_mgau actually take care of senone computation as well. The other is the fact that ms_gauden is a multi-stream implementation of GMM computation. </p>
<p>Definition in file <a class="el" href="ms__gauden_8h_source.html">ms_gauden.h</a>.</p>
</div><hr/><h2>Function Documentation</h2>
<a class="anchor" id="a68cd25af0a2faf05eacd17afd5407ea4"></a><!-- doxytag: member="ms_gauden.h::gauden_dist" ref="a68cd25af0a2faf05eacd17afd5407ea4" args="(gauden_t *g, int mgau, int n_top, mfcc_t **obs, gauden_dist_t **out_dist)" -->
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<td class="memname">int32 gauden_dist </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structgauden__t.html">gauden_t</a> * </td>
<td class="paramname"><em>g</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>mgau</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>n_top</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">mfcc_t ** </td>
<td class="paramname"><em>obs</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structgauden__dist__t.html">gauden_dist_t</a> ** </td>
<td class="paramname"><em>out_dist</em> </td>
</tr>
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<td></td>
<td>)</td>
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<p>Compute gaussian density values for the given input observation vector wrt the specified mixture gaussian codebook (which may consist of several feature streams). </p>
<p>Density values are left UNnormalized. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if successful, -1 otherwise. </dd></dl>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">g</td><td>In: handle to entire ensemble of codebooks </td></tr>
<tr><td class="paramname">mgau</td><td>In: codebook for which density values to be evaluated (g->{mean,var}[mgau]) </td></tr>
<tr><td class="paramname">n_top</td><td>In: Number top densities to be evaluated </td></tr>
<tr><td class="paramname">obs</td><td>In: Observation vector; obs[f] = for feature f </td></tr>
<tr><td class="paramname">out_dist</td><td>Out: n_top best codewords and density values, in worsening order, for each feature stream. out_dist[f][i] = i-th best density for feature f. Caller must allocate memory for this output </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a8efb2c45fd5ac2b34bbff067a15fe6f5"></a><!-- doxytag: member="ms_gauden.h::gauden_dump" ref="a8efb2c45fd5ac2b34bbff067a15fe6f5" args="(const gauden_t *g)" -->
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<td class="memname">void gauden_dump </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structgauden__t.html">gauden_t</a> * </td>
<td class="paramname"><em>g</em></td><td>)</td>
<td></td>
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<p>Dump the definitionn of Gaussian distribution. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">g</td><td>In: Gaussian distribution g </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="ms__gauden_8c_source.html#l00138">138</a> of file <a class="el" href="ms__gauden_8c_source.html">ms_gauden.c</a>.</p>
<p>References <a class="el" href="ms__gauden_8h_source.html#l00091">gauden_t::n_mgau</a>.</p>
</div>
</div>
<a class="anchor" id="a9489d75ad3dbdc2bb413b43a17f48188"></a><!-- doxytag: member="ms_gauden.h::gauden_dump_ind" ref="a9489d75ad3dbdc2bb413b43a17f48188" args="(const gauden_t *g, int senidx)" -->
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<td class="memname">void gauden_dump_ind </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structgauden__t.html">gauden_t</a> * </td>
<td class="paramname"><em>g</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>senidx</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</table>
</div>
<div class="memdoc">
<p>Dump the definition of Gaussian distribution of a particular index to the standard output stream. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">g</td><td>In: Gaussian distribution g </td></tr>
<tr><td class="paramname">senidx</td><td>In: The senone index of the Gaussian </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="ms__gauden_8c_source.html#l00148">148</a> of file <a class="el" href="ms__gauden_8c_source.html">ms_gauden.c</a>.</p>
<p>References <a class="el" href="ms__gauden_8h_source.html#l00088">gauden_t::det</a>, <a class="el" href="ms__gauden_8h_source.html#l00094">gauden_t::featlen</a>, <a class="el" href="ms__gauden_8h_source.html#l00086">gauden_t::mean</a>, <a class="el" href="ms__gauden_8h_source.html#l00093">gauden_t::n_density</a>, <a class="el" href="ms__gauden_8h_source.html#l00092">gauden_t::n_feat</a>, and <a class="el" href="ms__gauden_8h_source.html#l00087">gauden_t::var</a>.</p>
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<a class="anchor" id="a0306e088fa33894ca40182d2392ffe4d"></a><!-- doxytag: member="ms_gauden.h::gauden_free" ref="a0306e088fa33894ca40182d2392ffe4d" args="(gauden_t *g)" -->
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<td class="memname">void gauden_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structgauden__t.html">gauden_t</a> * </td>
<td class="paramname"><em>g</em></td><td>)</td>
<td></td>
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<p>Release memory allocated by gauden_init. </p>
<p>In: The <a class="el" href="structgauden__t.html" title="Multivariate gaussian mixture density parameters.">gauden_t</a> to free </p>
<p>Definition at line <a class="el" href="ms__gauden_8c_source.html#l00399">399</a> of file <a class="el" href="ms__gauden_8c_source.html">ms_gauden.c</a>.</p>
<p>References <a class="el" href="ms__gauden_8h_source.html#l00088">gauden_t::det</a>, <a class="el" href="ms__gauden_8h_source.html#l00094">gauden_t::featlen</a>, <a class="el" href="ms__gauden_8h_source.html#l00086">gauden_t::mean</a>, and <a class="el" href="ms__gauden_8h_source.html#l00087">gauden_t::var</a>.</p>
</div>
</div>
<a class="anchor" id="ae4587b0aeb39fd926622a422969ecebc"></a><!-- doxytag: member="ms_gauden.h::gauden_init" ref="ae4587b0aeb39fd926622a422969ecebc" args="(char const *meanfile, char const *varfile, float32 varfloor, logmath_t *lmath)" -->
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<td class="memname"><a class="el" href="structgauden__t.html">gauden_t</a>* gauden_init </td>
<td>(</td>
<td class="paramtype">char const * </td>
<td class="paramname"><em>meanfile</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char const * </td>
<td class="paramname"><em>varfile</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float32 </td>
<td class="paramname"><em>varfloor</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">logmath_t * </td>
<td class="paramname"><em>lmath</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>Read mixture gaussian codebooks from the given files. </p>
<p>Allocate memory space needed for them. Apply the specified variance floor value. Return value: ptr to the model created; NULL if error. (See Sphinx3 model file-format documentation.) </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">meanfile</td><td>Input: File containing means of mixture gaussians </td></tr>
<tr><td class="paramname">varfile</td><td>Input: File containing variances of mixture gaussians </td></tr>
<tr><td class="paramname">varfloor</td><td>Input: Floor value to be applied to variances </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="ms__gauden_8c_source.html#l00361">361</a> of file <a class="el" href="ms__gauden_8c_source.html">ms_gauden.c</a>.</p>
<p>References <a class="el" href="ms__gauden_8h_source.html#l00094">gauden_t::featlen</a>, <a class="el" href="ms__gauden_8h_source.html#l00090">gauden_t::lmath</a>, <a class="el" href="ms__gauden_8h_source.html#l00086">gauden_t::mean</a>, <a class="el" href="ms__gauden_8h_source.html#l00093">gauden_t::n_density</a>, <a class="el" href="ms__gauden_8h_source.html#l00092">gauden_t::n_feat</a>, <a class="el" href="ms__gauden_8h_source.html#l00091">gauden_t::n_mgau</a>, and <a class="el" href="ms__gauden_8h_source.html#l00087">gauden_t::var</a>.</p>
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<a class="anchor" id="ab640722f2c2b1e8bc6e883d9b5b72494"></a><!-- doxytag: member="ms_gauden.h::gauden_mllr_transform" ref="ab640722f2c2b1e8bc6e883d9b5b72494" args="(gauden_t *s, ps_mllr_t *mllr, cmd_ln_t *config)" -->
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<td class="memname">int32 gauden_mllr_transform </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structgauden__t.html">gauden_t</a> * </td>
<td class="paramname"><em>s</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structps__mllr__s.html">ps_mllr_t</a> * </td>
<td class="paramname"><em>mllr</em>, </td>
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<td></td>
<td class="paramtype">cmd_ln_t * </td>
<td class="paramname"><em>config</em> </td>
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<td></td>
<td>)</td>
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<p>Transform Gaussians according to an MLLR matrix (or, eventually, more). </p>
<p>Definition at line <a class="el" href="ms__gauden_8c_source.html#l00550">550</a> of file <a class="el" href="ms__gauden_8c_source.html">ms_gauden.c</a>.</p>
<p>References <a class="el" href="acmod_8h_source.html#l00086">ps_mllr_s::A</a>, <a class="el" href="acmod_8h_source.html#l00087">ps_mllr_s::b</a>, <a class="el" href="ms__gauden_8h_source.html#l00094">gauden_t::featlen</a>, <a class="el" href="acmod_8h_source.html#l00088">ps_mllr_s::h</a>, <a class="el" href="ms__gauden_8h_source.html#l00090">gauden_t::lmath</a>, <a class="el" href="ms__gauden_8h_source.html#l00086">gauden_t::mean</a>, <a class="el" href="ms__gauden_8h_source.html#l00093">gauden_t::n_density</a>, <a class="el" href="ms__gauden_8h_source.html#l00092">gauden_t::n_feat</a>, <a class="el" href="ms__gauden_8h_source.html#l00091">gauden_t::n_mgau</a>, and <a class="el" href="ms__gauden_8h_source.html#l00087">gauden_t::var</a>.</p>
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