annotate dsp/hz2mel.m @ 61:eff6bddf82e3
tip
Finally implemented perceptual brightness thing.
| author |
samer |
| date |
Sun, 11 Oct 2015 10:20:42 +0100 |
| parents |
c3b0cd708782 |
| children |
|
| rev |
line source |
|
samer@32
|
1 % hz2mel - Convert frequencies from Hertz to mel scale.
|
|
samer@32
|
2 %
|
|
samer@32
|
3 % hz2mel ::
|
|
samer@32
|
4 % [[D]->nonneg] ~'any shape array of frequencies in Hz'
|
|
samer@32
|
5 % -> [[D]->nonneg] ~'corresponding array of frequencies in mels'.
|
|
samer@32
|
6 %
|
|
samer@32
|
7 % Mel scale is approx linear below 700 Hz, and approx log above.
|
|
samer@32
|
8 % Overall scaling fixed so that 1000 mel = 1000 Hz.
|
|
samer@32
|
9 function m=hz2mel(f), m=2595*log10(1+f/700);
|
