Hi, If you have the Wavelet Toolbox software, use wavedec2 and specify which Daubechies' wavelet you wish to use. There are a number of Daubechies' extremal phase and least asymmetric phase wavelet filters included in the toolbox.
Hi Jaffino, the term "octave" as applied to the DWT is just referring to the dyadic scales. So you take all the coefficients at that scale. For example:
x = randn(1024,1);
[C,L] = wavedec(x,3,'db4');
d3 = detcoef(C,L,3);
d3 is the vector of coefficients at scale 3 (3rd octave). I think octave is a bit outdated now in the wavelet literature, better to refer to them as just scales.
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