Reply by Umutesi Faith●February 22, 20062006-02-22
one more thing that is not clear to me is:
in this equation: yhigh[n] = sum_k(x[2n-k]*g[k])
n is the length of the input sequence and k is for the filter length
BUT is this equivalent equation ( from Robi's tutorial),
yhigh[k] = sum_n(x[n]*g[2k-n])
does k here mean the length of the input sequence and n the filter length
as opposite to the previous equations
Can anyone give me some hints about this? Thanks again!
Reply by Umutesi Faith●February 22, 20062006-02-22
Hello
I would like to ask if there is any difference between the following
equations. Actually these are the wavelet equations for the filtering and
the downsampling! The 2 steps are combined in one!
// yhigh[k] = sum_n(x[n]*g[2k-n]) is it the same as
yhigh[n] = sum_k(x[2n-k]*g[k])
// ylow[k] = sum_n(x[n]*h[2k-n]) is it the same as
ylow[k] = sum_n(x[n]*g[2k-n])
Can we assume that the results given by both equations are equal!!
Thanks in advance!