bi-orthogonal wavelet filter set
[Lo_D,Hi_D,Lo_R,Hi_R]=biorfilt(DF,RF)
analysis scaling filter
synthesis scaling filter
lowpass analysis filter
highpass analysis filter
lowpass synthesis filter
highpass synthesis filter
orthfilt is an utility function for obtaining analysis and synthesis filter set of given bi-orthogonal spline wavelets. DF and RF should be output of biorfilt result with the same length.