son param
This commit is contained in:
parent
26707489e0
commit
a724bfafcc
9 changed files with 373 additions and 0 deletions
216
rossignol/parametrique/fluteircam-dsp_max_MUSIC_p4M210.svg
Normal file
216
rossignol/parametrique/fluteircam-dsp_max_MUSIC_p4M210.svg
Normal file
File diff suppressed because one or more lines are too long
After Width: | Height: | Size: 47 KiB |
BIN
rossignol/parametrique/fluteircam-spectre_max_fft.png
Normal file
BIN
rossignol/parametrique/fluteircam-spectre_max_fft.png
Normal file
Binary file not shown.
After Width: | Height: | Size: 19 KiB |
75
rossignol/parametrique/mymusic_matlab.m
Normal file
75
rossignol/parametrique/mymusic_matlab.m
Normal file
|
@ -0,0 +1,75 @@
|
||||||
|
%%% Algorithme de Music pour la d\'etermination des param\`etres Music
|
||||||
|
%%%
|
||||||
|
%%% entr\'ees :
|
||||||
|
%%% - xx : signal
|
||||||
|
%%% - pp : ordre du mod\`ele (choisi de mani\`ere ind\'ependante)
|
||||||
|
%%% - MM : nombre de coefficients de corr\'elation pris en compte (MM>=pp)
|
||||||
|
%%% - fe : fr\'equence d'\'echantillonnage
|
||||||
|
%%%
|
||||||
|
%%% sorties :
|
||||||
|
%%% - ff : fr\'equences auxquelles la dsp a \'et\'e calcul\'ee
|
||||||
|
%%% - mydsp : la dsp elle-m\^eme
|
||||||
|
%%%
|
||||||
|
%%% exemples : clear;rand('seed',100*sum(clock));fe=32000;f0=440;tsig=1280;xx=cos(2*pi*f0/fe*[1:tsig]+2*pi*rand(1,1));mymusic(xx,2,10,fe);
|
||||||
|
%%% clear;rand('seed',100*sum(clock));fe=32000;f0=440;tsig=1280;xx=cos(2*pi*f0/fe*[1:tsig]+2*pi*rand(1,1))+cos(2*pi*(f0+26)/fe*[1:tsig]+2*pi*rand(1,1));mymusic(xx,4,300,fe);
|
||||||
|
%%%
|
||||||
|
%%% S. Rossignol -- 2012
|
||||||
|
|
||||||
|
|
||||||
|
%%% utilisation en script :
|
||||||
|
%clear;rand('seed',100*sum(clock));fe=32000;f0=440;tsig=1280;xx=cos(2*pi*f0/fe*[1:tsig]+2*pi*rand(1,1))+cos(2*pi*(f0+26)/fe*[1:tsig]+2*pi*rand(1,1));pp=4;MM=400;
|
||||||
|
%clear;rand('seed',100*sum(clock));fe=32000;f0=440;tsig=1280;xx=cos(2*pi*f0/fe*[1:tsig]+2*pi*rand(1,1))+1e-2*randn(1,tsig);pp=2;MM=10;
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
function [ff, mydsp] = mymusic_matlab(xx, pp, MM, fe)
|
||||||
|
|
||||||
|
|
||||||
|
if (MM<=pp)
|
||||||
|
fprintf(1, 'Il faut absolument MM>pp !!!\n');
|
||||||
|
return;
|
||||||
|
end;
|
||||||
|
|
||||||
|
MM1=MM-1;
|
||||||
|
res=xx;
|
||||||
|
xx = xx-mean(xx);
|
||||||
|
|
||||||
|
|
||||||
|
%%% corr\'elations
|
||||||
|
acf = xcorr(xx, MM1, 'biased');
|
||||||
|
lMM=length(acf);
|
||||||
|
rrr1 = acf(MM1+1:lMM)';
|
||||||
|
for ii=1:MM1
|
||||||
|
rrr1 = [rrr1 acf(MM1+1-ii:lMM-ii)'];
|
||||||
|
end;
|
||||||
|
rrr1 = rrr1';
|
||||||
|
|
||||||
|
|
||||||
|
%%% m\'ethode directe pour trouver toutes les valeurs propres
|
||||||
|
[v, lambda] = eig(rrr1);
|
||||||
|
lamb = diag(lambda);
|
||||||
|
[vl,pl] = sort(abs(lamb),'descend');
|
||||||
|
|
||||||
|
|
||||||
|
%%% densit\'e spectrale de puissance
|
||||||
|
df=0.9765625; %%% la dsp est calcul\'ee tous les df Hz
|
||||||
|
ff=-fe/2:df:fe/2;
|
||||||
|
|
||||||
|
mydsp=zeros(length(ff),1);
|
||||||
|
deni=zeros(MM,MM);
|
||||||
|
for ii=pp+1:MM
|
||||||
|
deni = deni + v(:,pl(ii))*conj(v(:,pl(ii)))';
|
||||||
|
end;
|
||||||
|
for ii=1:length(ff)
|
||||||
|
ee = cos(2*pi*ff(ii)*[0:MM1]/fe);
|
||||||
|
den = conj(ee)*deni*ee';
|
||||||
|
mydsp(ii) = abs(1/den);
|
||||||
|
end;
|
||||||
|
|
||||||
|
|
||||||
|
%%% on enl\`eve \'eventuellement une composante non nulle
|
||||||
|
mydsp = mydsp-min(mydsp);
|
||||||
|
%mydsp = mydsp/max(mydsp); %%% si on fait \c{c}a, c'est norme 1
|
||||||
|
|
||||||
|
end
|
||||||
|
|
BIN
rossignol/parametrique/myson-fft.png
Normal file
BIN
rossignol/parametrique/myson-fft.png
Normal file
Binary file not shown.
After Width: | Height: | Size: 17 KiB |
BIN
rossignol/parametrique/myson-fft_zoom1.png
Normal file
BIN
rossignol/parametrique/myson-fft_zoom1.png
Normal file
Binary file not shown.
After Width: | Height: | Size: 16 KiB |
BIN
rossignol/parametrique/myson-fft_zoom2.png
Normal file
BIN
rossignol/parametrique/myson-fft_zoom2.png
Normal file
Binary file not shown.
After Width: | Height: | Size: 13 KiB |
82
rossignol/parametrique/parametrique_MUSIC_fluteircam.m
Normal file
82
rossignol/parametrique/parametrique_MUSIC_fluteircam.m
Normal file
|
@ -0,0 +1,82 @@
|
||||||
|
|
||||||
|
|
||||||
|
%rand('seed',100*sum(clock));
|
||||||
|
%fe=32000;
|
||||||
|
%f0=440;
|
||||||
|
%tsig=1280;
|
||||||
|
%xx=cos(2*pi*f0/fe*[1:tsig]+2*pi*rand(1,1))+cos(2*pi*(f0+40)/fe*[1:tsig]+2*pi*rand(1,1))+cos(2*pi*2*f0/fe*[1:tsig]+2*pi*rand(1,1))+cos(2*pi*(2*f0+40)/fe*[1:tsig]+2*pi*rand(1,1));
|
||||||
|
%xx=cos(2*pi*f0/fe*[1:tsig]+2*pi*rand(1,1))+1e-2*randn(1,tsig);
|
||||||
|
%pp=2;
|
||||||
|
%MM=10;
|
||||||
|
|
||||||
|
% returns sampling frequency in Hz and data
|
||||||
|
[xx,fe] = audioread('fluteircam.wav');
|
||||||
|
xx = xx';
|
||||||
|
|
||||||
|
pp=4;
|
||||||
|
MM=210;
|
||||||
|
|
||||||
|
lenW = 0.04*fe;
|
||||||
|
|
||||||
|
maxFreqs = [];
|
||||||
|
|
||||||
|
for i = 0:floor((length(xx)-lenW+1)/lenW)
|
||||||
|
xxsub = xx(1,lenW*i+1:lenW*(i+1));
|
||||||
|
[ff, mydsp] = mymusic_matlab(xxsub,pp,MM,fe);
|
||||||
|
|
||||||
|
mydspP = mydsp(floor(length(mydsp)/2):end,:);
|
||||||
|
ffP = ff(:,floor(length(mydsp)/2):end);
|
||||||
|
[maxi,ind] = max(mydspP);
|
||||||
|
maxFreq = ffP(ind);
|
||||||
|
maxFreqs = [maxFreqs maxFreq];
|
||||||
|
end
|
||||||
|
|
||||||
|
figure()
|
||||||
|
tt = (lenW/2:lenW:length(xx))/fe;
|
||||||
|
plot(tt,maxFreqs)
|
||||||
|
xlabel('temps (s)')
|
||||||
|
ylabel('fréquences (Hz)')
|
||||||
|
title('Frequency max DSP MUSIC signal flureircam (p = 2, M = 200)')
|
||||||
|
|
||||||
|
%%% figures
|
||||||
|
% figure();
|
||||||
|
% clf;
|
||||||
|
% grid on;
|
||||||
|
% hold on;
|
||||||
|
% plot(ff,mydsp,'linewidth',2);
|
||||||
|
% xlabel('frequency (in Hz)','fontsize',20);
|
||||||
|
% ylabel('magnitude','fontsize',20);
|
||||||
|
% title('zoom MUSIC');
|
||||||
|
% xlim([400 506]);
|
||||||
|
% hold off;
|
||||||
|
|
||||||
|
% figure();
|
||||||
|
% clf;
|
||||||
|
% grid on;
|
||||||
|
% hold on;
|
||||||
|
% plot(ff,mydsp,'linewidth',2);
|
||||||
|
% xlabel('frequency (in Hz)','fontsize',20);
|
||||||
|
% ylabel('magnitude','fontsize',20);
|
||||||
|
% title('MUSIC');
|
||||||
|
% hold off;
|
||||||
|
% drawnow;
|
||||||
|
|
||||||
|
% % montrer intéret paramétrique par rapport à FFT
|
||||||
|
% figure();
|
||||||
|
% fftxx = abs(fftshift(fft(xx))); % fftshift permet de passer de la fft entre 0 et fe à la fft entre -fe/2 et fe/2
|
||||||
|
% freq = linspace(-fe/2,fe/2,length(fftxx));
|
||||||
|
% plot(freq,fftxx);
|
||||||
|
% grid on;
|
||||||
|
% xlabel('fréqunce (Hz)');
|
||||||
|
% ylabel('amplitude (u.a.)');
|
||||||
|
% title('fft');
|
||||||
|
%
|
||||||
|
% figure();
|
||||||
|
% xx = [xx zeros(1,32768-length(xx))]; % 2^15 = 32768
|
||||||
|
% fftxx = abs(fftshift(fft(xx)));
|
||||||
|
% freq = linspace(-fe/2,fe/2,length(fftxx));
|
||||||
|
% plot(freq,fftxx);
|
||||||
|
% grid on;
|
||||||
|
% xlabel('fréqunce (Hz)');
|
||||||
|
% ylabel('amplitude (u.a.)');
|
||||||
|
% title('fft zero padding');
|
Loading…
Reference in a new issue