www.pudn.com > LPCToolbox.rar > LPCTOOL.M


> lpctool(filelist [,index])
>
> LPCTOOL is a tool for formant analysis of speech sounds using
> Linear Predictive Coding. For each sound, it allows the user to
> specify the filter order, and computes the formant locations for
> each frame using 512-point FFT of the LPC spectrum and peak-
> picking using three-point parabolic interpolation. The resulting
> formant estimates are written to a file (e.g. if the sound file is
> SND1.WAV, the estimates are written to SND1.DAT).
>
> filelist: A list of filenames (can be a array of strings, or a cell
> array). If a single filename is given and it has an extension of
> .DAT or .TXT, it is taken to be a file containing the list of
> sound filenames (one on each line). Currently, .WAV, .AU,
> and .RAW files are supported.
>
> index : the index at which to start processing the list of
> filenames. Default = 1.>
>
> References:
>
> Markel &amt; Gray (1976). Linear Prediction of Speech, Springer-Verlag.
> Vallabha &amt; Tuller, Systematic Errors in Formant Estimation.
> Vallabha &amt; Tuller, Choice of Filter Order in LPC Analysis of Speech.
>
> Gautam Vallabha (vallabha@walt.ccs.fau.edu), NOV-15-2000
> Center for Complex Systems, Florida Atlantic University.
>

function lpctool(filelst, idx)
global Cs Filelist Ap
global Handle

if nargin < 2, idx = 1; end

Filelist = loadfilelist(filelst);
if length(Filelist)==0,
fprintf(1, 'No sound files!\n');
return;
end

setparams; > setup Ap &amt; initialize Cs
uiconfig('set');

[err,msg] = loadsound(idx);
if err==0,
rcfig_draw;
else
errordlg(msg, 'Error');
end

rcfig_draw;

> control is released to rcfig and pksfig