k - spsc - Graz University of Technology
k - spsc - Graz University of Technology
k - spsc - Graz University of Technology
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SPSC – Signal Processing & Speech Communication Lab<br />
Passing from STFT to Wavelets<br />
Step 1:<br />
Giving up the STFT modulation scheme and obtain filters<br />
h<br />
k<br />
−k<br />
() t a ( ) 2 −k<br />
= h a t a > 1Kscaling<br />
factor,<br />
k = int eger<br />
in the frequency domain:<br />
k<br />
k<br />
( jΩ) = a H ( ja Ω)<br />
2<br />
H<br />
k<br />
all reponses are obtained by frequency – scaling <strong>of</strong> a prototype response H(<br />
jΩ)<br />
Pr<strong>of</strong>essor Georg Holzmann, Horst Cerjak, Christian 19.12.2005 Wallinger 12.06.07 Wavelet T. - Relation to Filter Banks<br />
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