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Re: LTFAT version 0.97


From: Gary Nelson
Subject: Re: LTFAT version 0.97
Date: Sun, 23 May 2010 15:35:19 -0700

What will it take to get a build for Mac OS-x Snow Leopard?

Thanks
Gary Nelson

On May 23, 2010, at 8:17 AM, Peter L. Søndergaard wrote:

> 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.
> 
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> 

Gary Nelson
address@hidden






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