<p> The LTPDA Toolbox contains a set of tools to characterise digital data streams within the framework of LTPDA Objects. The current available methods can be grouped in the following categories:</p><p><ul> <li><a href="sigproc_dfilt.html"> Digital filtering</a></li> <li><a href="sigproc_diff.html"> Discrete Derivative</a></li> <li><a href="sigproc_spec.html"> Spectral estimation</a></li> <li><a href="sigproc_fit.html"> Fitting algorithms</a></li></ul></p>