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<li class="navelem"><a class="el" href="namespaceSimac.html">Simac</a></li><li class="navelem"><a class="el" href="classSimac_1_1ConstantQTransform.html">ConstantQTransform</a></li> </ul>
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<p><a class="el" href="classSimac_1_1ConstantQTransform.html" title="ConstantQTransform extract a ConstantQ spectrum using Blankertz's paper algorithm.">ConstantQTransform</a> extract a ConstantQ spectrum using Blankertz's paper algorithm.
<a href="classSimac_1_1ConstantQTransform.html#details">More...</a></p>
<p><code>#include <<a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>></code></p>
<p><a href="classSimac_1_1ConstantQTransform-members.html">List of all members.</a></p>
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Public Types</h2></td></tr>
<tr class="memitem:a866a0302c5e0361be64198224d3f9eef"><td class="memItemLeft" align="right" valign="top">typedef std::vector< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a866a0302c5e0361be64198224d3f9eef">ConstantQSpectrum</a></td></tr>
<tr class="memitem:a6074b7e832245452cf033288e8eac1f7"><td class="memItemLeft" align="right" valign="top">typedef std::vector< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a6074b7e832245452cf033288e8eac1f7">Spectrum</a></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a91e38773759f305afd3d6c808ab4940b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a91e38773759f305afd3d6c808ab4940b">doIt</a> (const std::vector< double > &fftData)</td></tr>
<tr class="memitem:adb466bc046a69a8c7892b87587e1549c"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#adb466bc046a69a8c7892b87587e1549c">ConstantQTransform</a> (<a class="el" href="classunsigned.html">unsigned</a> FS, double fmin, double fmax, <a class="el" href="classunsigned.html">unsigned</a> binsPerOctave)</td></tr>
<tr class="memitem:a95f422b1ed15fa4a4265116be24f882b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a95f422b1ed15fa4a4265116be24f882b">sparsekernel</a> (double)</td></tr>
<tr class="memitem:a519374219882f308419bd0658697576b"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a519374219882f308419bd0658697576b">~ConstantQTransform</a> ()</td></tr>
<tr class="memitem:ab1887e3e346eb31a7cb1da46a0159cf4"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classSimac_1_1ConstantQTransform.html#a866a0302c5e0361be64198224d3f9eef">ConstantQSpectrum</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#ab1887e3e346eb31a7cb1da46a0159cf4">constantQSpectrum</a> () const </td></tr>
<tr class="memitem:afdff8132047803eb5b54a12bf2cd4875"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#afdff8132047803eb5b54a12bf2cd4875">getQ</a> () const </td></tr>
<tr class="memitem:a1e009dc3ca426d9847b5d120ddf59d56"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classint.html">int</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a1e009dc3ca426d9847b5d120ddf59d56">getK</a> () const </td></tr>
<tr class="memitem:a180a1e9d1892ec073036f64834b25a3e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classint.html">int</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classSimac_1_1ConstantQTransform.html#a180a1e9d1892ec073036f64834b25a3e">getfftlength</a> () const </td></tr>
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p><a class="el" href="classSimac_1_1ConstantQTransform.html" title="ConstantQTransform extract a ConstantQ spectrum using Blankertz's paper algorithm.">ConstantQTransform</a> extract a ConstantQ spectrum using Blankertz's paper algorithm. </p>
<p>This transformation is similar to the Fourier transform but it generates bins which bins are proportional to their center frequency.</p>
<p>This implementation saves computational time by moving most computation to configuration time and using a fft as starting point for the transform.</p>
<p><b>Parameters:</b> </p>
<ul>
<li>samplinRate: The sampling rate for the input audio</li>
<li>minFrequency: The minimum frequency to be considered</li>
<li>maxFrequency: The maximum frequency to be considered</li>
<li>binsPerOctave: The number of bins required for each octave</li>
</ul>
<p><b>Configuration</b> Outputs:</p>
<ul>
<li>Q: Quality factor for the bins</li>
<li>K: Number of Constant Q spectrum bins</li>
<li>spectrumSize: Number of required fft spectrum bins</li>
</ul>
<p><b>Inputs:</b> </p>
<ul>
<li>spectrum: An interlaced complex spectrum (complex, so, size 2*fftLength)</li>
</ul>
<p><b>Outputs:</b> </p>
<ul>
<li>constantQSpectrum: An interlaced complex spectrum (complex, so, size 2*K) </li>
</ul>
<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00057">57</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
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<td class="memname">typedef std::vector<double> <a class="el" href="classSimac_1_1ConstantQTransform.html#a866a0302c5e0361be64198224d3f9eef">Simac::ConstantQTransform::ConstantQSpectrum</a></td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00060">60</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
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<td class="memname">typedef std::vector<double> <a class="el" href="classSimac_1_1ConstantQTransform.html#a6074b7e832245452cf033288e8eac1f7">Simac::ConstantQTransform::Spectrum</a></td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00061">61</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
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<hr/><h2>Constructor & Destructor Documentation</h2>
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<td class="memname">Simac::ConstantQTransform::ConstantQTransform </td>
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<td class="paramtype"><a class="el" href="classunsigned.html">unsigned</a> </td>
<td class="paramname"><em>FS</em>, </td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8cxx_source.html#l00042">42</a> of file <a class="el" href="ConstantQTransform_8cxx_source.html">ConstantQTransform.cxx</a>.</p>
<p>References <a class="el" href="ConstantQTransform_8cxx_source.html#l00031">Simac::nextpow2()</a>.</p>
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<p>Definition at line <a class="el" href="ConstantQTransform_8cxx_source.html#l00059">59</a> of file <a class="el" href="ConstantQTransform_8cxx_source.html">ConstantQTransform.cxx</a>.</p>
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<hr/><h2>Member Function Documentation</h2>
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<td class="memname">const <a class="el" href="classSimac_1_1ConstantQTransform.html#a866a0302c5e0361be64198224d3f9eef">ConstantQSpectrum</a>& Simac::ConstantQTransform::constantQSpectrum </td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00087">87</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
<p>Referenced by <a class="el" href="ConstantQTransform_8cxx_source.html#l00116">doIt()</a>, and <a class="el" href="ChordExtractor_8hxx_source.html#l00100">Simac::ChordExtractor::doIt()</a>.</p>
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<td class="memname">void Simac::ConstantQTransform::doIt </td>
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<td class="paramname"><em>fftData</em></td><td>)</td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8cxx_source.html#l00116">116</a> of file <a class="el" href="ConstantQTransform_8cxx_source.html">ConstantQTransform.cxx</a>.</p>
<p>References <a class="el" href="ConstantQTransform_8hxx_source.html#l00087">constantQSpectrum()</a>.</p>
<p>Referenced by <a class="el" href="ChordExtractor_8hxx_source.html#l00100">Simac::ChordExtractor::doIt()</a>.</p>
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<td class="memname"><a class="el" href="classint.html">int</a> Simac::ConstantQTransform::getfftlength </td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00090">90</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
<p>Referenced by <a class="el" href="ChordExtractor_8hxx_source.html#l00098">Simac::ChordExtractor::frameSize()</a>, and <a class="el" href="ChordExtractor_8hxx_source.html#l00097">Simac::ChordExtractor::hop()</a>.</p>
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<td class="memname"><a class="el" href="classint.html">int</a> Simac::ConstantQTransform::getK </td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00089">89</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
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<td class="memname">double Simac::ConstantQTransform::getQ </td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8hxx_source.html#l00088">88</a> of file <a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a>.</p>
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<td class="memname">void Simac::ConstantQTransform::sparsekernel </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>thresh</em></td><td>)</td>
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<p>Definition at line <a class="el" href="ConstantQTransform_8cxx_source.html#l00063">63</a> of file <a class="el" href="ConstantQTransform_8cxx_source.html">ConstantQTransform.cxx</a>.</p>
<p>References <a class="el" href="FourierTransform_8cxx_source.html#l00166">FourierTransform::doIt()</a>, <a class="el" href="FourierTransform_8hxx_source.html#l00044">FourierTransform::spectrum()</a>, and <a class="el" href="ConstantQTransform_8cxx_source.html#l00036">Simac::squaredModule()</a>.</p>
<p>Referenced by <a class="el" href="ChordExtractor_8hxx_source.html#l00064">Simac::ChordExtractor::ChordExtractor()</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="ConstantQTransform_8hxx_source.html">ConstantQTransform.hxx</a></li>
<li><a class="el" href="ConstantQTransform_8cxx_source.html">ConstantQTransform.cxx</a></li>
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