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pitch quantization

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Jean-Marc Valin 2019-01-29 17:08:53 -05:00
parent 48a8f973b5
commit 43ffd19bc1
1 changed files with 21 additions and 2 deletions
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23
dnn/dump_data.c
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@ -254,8 +254,27 @@ static void compute_frame_features(DenoiseState *st, kiss_fft_cpx *X, kiss_fft_c
best[sub] = sub_period;
}
best_a = (sw*sxy - sx*sy)/(sw*sxx - sx*sx);
best_b = (sxx*sy - sx*sxy)/(sw*sxx - sx*sx);
for (sub=2;sub<10;sub++) printf("%f %d %f\n", best_b + sub*best_a, best[sub], best_corr);
{
float mean_pitch = sy/sw;
/* Allow a relative variation of up to 1/4 over 8 sub-frames. */
float max_a = mean_pitch/32;
best_a = MIN16(max_a, MAX16(-max_a, best_a));
}
//best_b = (sxx*sy - sx*sxy)/(sw*sxx - sx*sx);
best_b = (sy - best_a*sx)/sw;
float center_pitch = best_b+5.5*best_a;
int main_pitch = (int)floor(.5 + 21.*log2(center_pitch/PITCH_MIN_PERIOD));
main_pitch = IMAX(0, IMIN(63, main_pitch));
int modulation = (int)floor(.5 + 16*7*best_a/center_pitch);
modulation = IMAX(-3, IMIN(3, modulation));
//printf("%d %d\n", main_pitch, modulation);
//printf("%f %f\n", best_a/center_pitch, best_corr);
//for (sub=2;sub<10;sub++) printf("%f %d %f\n", best_b + sub*best_a, best[sub], best_corr);
for (sub=2;sub<10;sub++) {
float p = pow(2.f, main_pitch/21.)*PITCH_MIN_PERIOD;
p *= 1 + modulation/16./7.*(sub-5.5);
printf("%f %f %d %f\n", best_b + sub*best_a, p, best[sub], best_corr);
}
//printf("%d %f %f %f\n", best_period, best_a, best_b, best_corr);
RNN_COPY(&xc[0][0], &xc[8][0], PITCH_MAX_PERIOD);
RNN_COPY(&xc[1][0], &xc[9][0], PITCH_MAX_PERIOD);