LTFAT version 0.97

[Peter L.]

Hi everone,

I would like to announce the availability of the Linear Time-Frequency
Analysis Toolbox, LTFAT, version 0.97.

LTFAT is a Matlab/Octave toolbox for doing time-frequency analysis. It
is intended both as an educational and computational tool. The toolbox
provides the basic Gabor, Wilson and MDCT transforms along with routines
for constructing windows (filter prototypes) and routines for
manipulating coefficients.

LTFAT is GPLv3 and available from http://ltfat.sourceforge.net

The toolbox is based on a C library; the library can be compiled for
Octave on both Linux and WinXP.

Highlights of some particularly useful functions:

* fftreal: compute only the positive frequencies of the FFT of a
real-valued signal. fftreal calls FFTW directly if the backend has been
compiled.

* dgt and idgt: Discrete Gabor transform, also known as an FFT
filterbank. idgt gives perfect reconstruction for arbitrary windows.

* wmdct and iwmdct: Windowed Modified Discrete Cosine Transform and its
inverse. This provides an (orthonormal) basis with basis elements that
are well localized in both time and frequency. MDCT transforms are used
heavily in audio coding.

* sgram: Flexible, easy to use and very accurate spectrogram based on
dgt.

Installation instructions:

* Type 'ltfatstart' to start the toolbox.
* Type 'ltfatmex' to compile the C library and the Octave C++ wrappers.

Cheers,

Peter.