Mercurial > hg > ishara
diff dsp/hz2mel.m @ 32:c3b0cd708782
Imported core dsp tools.
| author | samer |
|---|---|
| date | Sun, 20 Jan 2013 13:48:47 +0000 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dsp/hz2mel.m Sun Jan 20 13:48:47 2013 +0000 @@ -0,0 +1,9 @@ +% hz2mel - Convert frequencies from Hertz to mel scale. +% +% hz2mel :: +% [[D]->nonneg] ~'any shape array of frequencies in Hz' +% -> [[D]->nonneg] ~'corresponding array of frequencies in mels'. +% +% Mel scale is approx linear below 700 Hz, and approx log above. +% Overall scaling fixed so that 1000 mel = 1000 Hz. +function m=hz2mel(f), m=2595*log10(1+f/700);