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<html><head><meta name="Description" content="time frequency distributions"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link rel="stylesheet" href="style/stylesheet.css" type="text/css"><title>TFTB -- Time-Frequency toolbox</title></head> <body><table align="center" border="0" cellpadding="10" cellspacing="0" width="700"><tbody><tr class="subsubbanner"><td><a href="index_fr.html" title="Cette page en français"><img src="image/fr.png" align=right></a><a href="http://tftb.nongnu.org"><tt>http://tftb.nongnu.org</tt></a></td></tr><tr class="banner"><td>the Time-Frequency Toolbox</td></tr><tr><td><br clear="all"><p>The Time-Frequency Toolbox (TFTB) is a collection of about 100 scriptsfor <a href="http://www.octave.org/">GNU Octave</a> and <ahref="http://www.mathworks.com/">Matlab (R)</a> developed for theanalysis of non-stationary signals using <ahref="demos.html">time-frequency distributions</a>. It is primaryintended for researchers, engineers and students with some basicknowledge in signal processing.</p><p>The toolbox contains numerous algorithms which implements various kindof time-frequency analysis with a special emphasis on quadratic energydistributions of the Cohen and affine classes, along with theirversion enhanced by the reassignment method. The toolbox also includessignal generation procedures, processing/post-processing routines(with display utilities) and a number of <ahref="demos.html">demonstrations</a>.</p><p>The TFTB is distributed under the terms of the <ahref="http://www.gnu.org/licenses/gpl.txt">GNU Public Licence</a>.</p><p>GNU Octave users, please check this <ahref="http://savannah.nongnu.org/cgi-bin/viewcvs/*checkout*/tftb/tftb/README?rev=HEAD&content-type=text/plain">importantnote</a>.</p><h3>Download</h3><p>Current version is freely available for <ahref="http://savannah.nongnu.org/download/tftb">download</a>.</p><p>It can also be accessed from CVS (read-only) with <ahref="http://savannah.nongnu.org/cgi-bin/viewcvs/tftb/">viewCVS</a> orusing the anonymous account (no password is needed):<font size=3><pre>export CVS_RSH="ssh"</pre><pre>cvs -z3 -d:ext:anoncvs@savannah.nongnu.org:/cvsroot/tftb co tftb</pre></font></p><p><font size=1>Note: when you later update from within the module's directory (with<em>cvs update</em>) you do not need the -d option anymore.</font></p><h3>Mailing lists</h3><p>There are two mailing lists devoted to the TFTB.<ul><li> <tt>tftb-info</tt>: Announcement about new releases of the TFTB [<a href="http://lists.nongnu.org/mailman/listinfo/tftb-info">subscribe</a>, no archive available]<br>Administrators <i>only</i> can send a message to this list.<li> <tt>tftb-help</tt>: General discussion about using the TFTB [<a href="http://lists.nongnu.org/mailman/listinfo/tftb-help">subscribe</a>, <a href="http://lists.nongnu.org/archive/html/tftb-help">archives</a>]</ul></p><h3>Documentation</h3><p>Each function of the Toolbox is documented by an online help. Areference manual collects them all in a single document.</p><ul> <li> See the <a href="http://savannah.nongnu.org/cgi-bin/viewcvs/*checkout*/tftb/tftb/mfiles/Contents.m?rev=HEAD&content-type=text/plain">Contents.m</a> file. <li> See the reference manual [<a href="refguide.pdf">PDF</a>,<a href="http://gdr-isis.org/tftb/refguide/">HTML</a>]. <li> See the tutorial [<a href="tutorial.pdf">PDF</a>,<a href="http://gdr-isis.org/tftb/tutorial/">HTML</a>].</ul><p>The documentation of the TFTB is distributed under the terms of <ahref="http://www.gnu.org/licenses/fdl.txt">GNU Free DocumentationLicense</a>.</p><h3>Bug report</h3><p>Before you file a bug, please read through the list of <ahref="https://savannah.nongnu.org/bugs/?func=browse&set=open&group=tftb">current and previous bugs</a> to determine if your bug has alreadybeen filed. If your bug does not appear in the list, compile adescription of the problem including a concise reproducible exampleand submit a <ahref="https://savannah.nongnu.org/bugs/?func=additem&group=tftb">bugreport</a>. If you succeeded in identifying the problem and you have asolution, join a <i>patch</i> to your bug report. Please, format the patch with the command<font size=3> <pre>diff -c old/file.m new/file.m > patch</pre> </font></p><h3>Related softwares</h3><ul> <li> The <a href="http://www-lagis.univ-lille1.fr/~davy/toolbox/Ctftbeng.html">Time-Frequency Toolbox in C</a> is a translation in C of parts of the TFTB.</li><li> <a href="http://tfd.sourceforge.net">DiscreteTFDs</a> is a time-frequency analysis package.<li> <a href="http://www-stat.stanford.edu/~wavelab">Wavelab</a>, a Matlab toolbox for wavelet analysis.<li> <a href="http://www.cmap.polytechnique.fr/%7Ebacry/LastWave/">LastWave</a>, a signal processing (wavelet oriented) software.<li> Another <a href="http://www2.mat.dtu.dk/people/P.Soendergaard/toolbox/">time-frequency toolbox</a> for working with Gabor frames for finite sequences.</ul> <h3>History and acknowledgments</h3> <p>The TFTB has been developed by François Auger, Olivier Lemoine,Paulo Gonçalvès and Patrick Flandrin under the auspicesof the <a href="http://www.cnrs.fr">CNRS</a> (Centre National de laRecherche Scientifique) within its <a href="http://gdr-isis.org">GdRInformation, Signal et Images</a>. Parts of the Toolbox have also beenwritten at Department of Electrical and Computer Engineering of <ahref="http://www-dsp.rice.edu/">Rice University</a> with the supportof the NSF. We would like to thank the <ahref="http://savannah.nongnu.org/cgi-bin/viewcvs/*checkout*/tftb/tftb/THANKS?rev=HEAD&content-type=text/plain">people</a>who helped in various ways.</p><hr></td></tr></tbody></table></body></html>⌨️ 快捷键说明
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