You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
866 B
29 lines
866 B
% glottal.m
|
|
% David Rowe 12 Sep 2009
|
|
% Matlab script to generate the phase spectra of a glottal pulse
|
|
|
|
% lpc10 pulse from spandsp. When the file glottal.c was used as a part of the
|
|
% excitation phase component in phase.c, phase_synth_zero_order(), no difference
|
|
% in speech quality was apparent. So left out of code for now.
|
|
|
|
sh=12
|
|
kexc = [ 8, -16, 26, -48, 86, -162, 294, -502, 718, -728, 184 672, -610, -672, 184, 728, 718, 502, 294, 162, 86, 48, 26, 16, 8];
|
|
kexc = shift(kexc,sh);
|
|
kexc = [kexc(1:sh) zeros(1,512-25) kexc(sh+1:25)];
|
|
figure(1)
|
|
clf
|
|
plot(kexc)
|
|
figure(2)
|
|
G = fft(kexc);
|
|
subplot(211)
|
|
plot((1:256)*(4000/256),unwrap(angle(G(1:256))))
|
|
subplot(212)
|
|
plot(20*log10(abs(G)))
|
|
|
|
f=fopen("glottal.c","wt");
|
|
fprintf(f,"const float glottal[]={\n");
|
|
for m=1:255
|
|
fprintf(f," %f,\n",angle(G(m)));
|
|
endfor
|
|
fprintf(f," %f};\n",angle(G(256)));
|
|
fclose(f);
|
|
|