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| author | bgtushar | 2017-11-30 20:31:42 +0530 |
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| committer | bgtushar | 2017-11-30 20:31:42 +0530 |
| commit | f6ef6a0238d4a028e65a0a7f1f1d39ff7979dec2 (patch) | |
| tree | 9d5f3f6632568deb6f285acebd9990f4eb02171a /help/en_US/scilab_en_US_help/stft.html | |
| parent | bde72bceca94ce47e8c65886878947cf3c2445cb (diff) | |
| parent | 99b498fb0cedd8560d18f032a4cb1fcae0c1fadb (diff) | |
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final commit
Diffstat (limited to 'help/en_US/scilab_en_US_help/stft.html')
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diff --git a/help/en_US/scilab_en_US_help/stft.html b/help/en_US/scilab_en_US_help/stft.html new file mode 100644 index 0000000..3c257ca --- /dev/null +++ b/help/en_US/scilab_en_US_help/stft.html @@ -0,0 +1,93 @@ +<html><head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + <title>stft</title> + <style type="text/css" media="all"> + @import url("scilab_code.css"); + @import url("xml_code.css"); + @import url("c_code.css"); + @import url("style.css"); + </style> + </head> + <body> + <div class="manualnavbar"> + <table width="100%"><tr> + <td width="30%"> + <span class="previous"><a href="statelevels.html"><< statelevels</a></span> + + </td> + <td width="40%" class="center"> + <span class="top"><a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a></span> + + </td> + <td width="30%" class="next"> + <span class="next"><a href="stmcb.html">stmcb >></a></span> + + </td> + </tr></table> + <hr /> + </div> + + + + <span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> >> <a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a> > stft</span> + + <br /><br /> + <div class="refnamediv"><h1 class="refname">stft</h1> + <p class="refpurpose">Compute the short-time Fourier transform of the vector X</p></div> + + +<div class="refsynopsisdiv"><h3 class="title">Calling Sequence</h3> + <div class="synopsis"><pre><span class="default">Y</span><span class="default"> = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">)</span> +<span class="default">Y</span><span class="default"> = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">)</span> +<span class="default">Y</span><span class="default"> = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">, </span><span class="default">INC</span><span class="default">)</span> +<span class="default">Y</span><span class="default"> = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">, </span><span class="default">INC</span><span class="default">, </span><span class="default">NUM_COEF</span><span class="default">)</span> +<span class="default">Y</span><span class="default"> = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">, </span><span class="default">INC</span><span class="default">, </span><span class="default">NUM_COEF</span><span class="default">, </span><span class="default">WIN_TYPE</span><span class="default">)</span> +<span class="default">[</span><span class="default">Y</span><span class="default">,</span><span class="default">C</span><span class="default">] = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">)</span> +<span class="default">[</span><span class="default">Y</span><span class="default">,</span><span class="default">C</span><span class="default">] = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">)</span> +<span class="default">[</span><span class="default">Y</span><span class="default">,</span><span class="default">C</span><span class="default">] = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">, </span><span class="default">INC</span><span class="default">)</span> +<span class="default">[</span><span class="default">Y</span><span class="default">,</span><span class="default">C</span><span class="default">] = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">, </span><span class="default">INC</span><span class="default">, </span><span class="default">NUM_COEF</span><span class="default">)</span> +<span class="default">[</span><span class="default">Y</span><span class="default">,</span><span class="default">C</span><span class="default">] = </span><span class="functionid">stft</span><span class="default"> (</span><span class="default">X</span><span class="default">, </span><span class="default">WIN_SIZE</span><span class="default">, </span><span class="default">INC</span><span class="default">, </span><span class="default">NUM_COEF</span><span class="default">, </span><span class="default">WIN_TYPE</span><span class="default">)</span></pre></div></div> + +<div class="refsection"><h3 class="title">Parameters</h3> + <dl><dt><span class="term">X:</span> + <dd><p class="para">Real scalar or vector</p></dd></dt> + <dt><span class="term">WIN_SIZE:</span> + <dd><p class="para">Size of the window used</p></dd></dt> + <dt><span class="term">INC:</span> + <dd><p class="para">Increment</p></dd></dt> + <dt><span class="term">WIN_TYPE:</span> + <dd><p class="para">Type of window</p></dd></dt></dl></div> + +<div class="refsection"><h3 class="title">Description</h3> + <p class="para">Compute the short-time Fourier transform of the vector X with NUM_COEF coefficients by applying a window of WIN_SIZE data points and an increment of INC points.</p> + <p class="para">Before computing the Fourier transform, one of the following windows is applied:</p> + <p class="para">"hanning" -> win_type = 1</p> + <p class="para">"hamming" -> win_type = 2</p> + <p class="para">"rectangle" -> win_type = 3</p> + <p class="para">The window names can be passed as strings or by the WIN_TYPE number.</p> + <p class="para">The following defaults are used for unspecified arguments:WIN_SIZE= 80, INC = 24, NUM_COEF = 64, and WIN_TYPE = 1.</p> + <p class="para">Y = stft (X, ...)' returns the absolute values of the Fourier coefficients according to the NUM_COEF positive frequencies.</p> + <p class="para">'[Y, C] = stft (x, ...)' returns the entire STFT-matrix Y and a 3-element vector C containing the window size, increment, and window type, which is needed by the 'synthesis' function.</p></div> + <br /> + + <div class="manualnavbar"> + <table width="100%"> + <tr><td colspan="3" class="next"><a href="http://bugzilla.scilab.org/enter_bug.cgi?product=Scilab%20software&component=Documentation%20pages" class="ulink">Report an issue</a></td></tr> +<tr> + <td width="30%"> + <span class="previous"><a href="statelevels.html"><< statelevels</a></span> + + </td> + <td width="40%" class="center"> + <span class="top"><a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a></span> + + </td> + <td width="30%" class="next"> + <span class="next"><a href="stmcb.html">stmcb >></a></span> + + </td> + </tr></table> + <hr /> + </div> + </body> +</html> |