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annotate dsp/hz2mel.m @ 32:c3b0cd708782

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Imported core dsp tools.
author samer
date Sun, 20 Jan 2013 13:48:47 +0000
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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);