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Fix DCT normalization

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This commit is contained in:
Jean-Marc Valin 2018-12-10 11:22:13 -05:00
parent a02d9c85e5
commit d533e4024d
1 changed files with 2 additions and 2 deletions
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4
dnn/denoise.c
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@ -218,7 +218,7 @@ static void dct(float *out, const float *in) {
for (j=0;j<NB_BANDS;j++) { for (j=0;j<NB_BANDS;j++) {
sum += in[j] * common.dct_table[j*NB_BANDS + i]; sum += in[j] * common.dct_table[j*NB_BANDS + i];
} }
out[i] = sum*sqrt(2./22); out[i] = sum*sqrt(2./NB_BANDS);
} }
} }
@ -231,7 +231,7 @@ static void idct(float *out, const float *in) {
for (j=0;j<NB_BANDS;j++) { for (j=0;j<NB_BANDS;j++) {
sum += in[j] * common.dct_table[i*NB_BANDS + j]; sum += in[j] * common.dct_table[i*NB_BANDS + j];
} }
out[i] = sum*sqrt(2.*22)*(1.f/NB_BANDS); out[i] = sum*sqrt(2./NB_BANDS);
} }
} }