Wavelet Toolbox    

Single-level reconstruction of 1-D wavelet decomposition



upwlev is a one-dimensional wavelet analysis function.

[NC,NL,cA] = upwlev(C,L,'wname') performs the single-level reconstruction of the wavelet decomposition structure [C,L] giving the new one [NC,NL], and extracts the last approximation coefficients vector cA.

[C,L] is a decomposition at level n = length(L)-2, so [NC,NL] is the same decomposition at level n-1 and cA is the approximation coefficients vector at level n.

'wname' is a string containing the wavelet name, C is the original wavelet decomposition vector, and L the corresponding bookkeeping vector (for detailed storage information, see wavedec).

Instead of giving the wavelet name, you can give the filters.

For [NC,NL,cA] = upwlev(C,L,Lo_R,Hi_R), Lo_R is the reconstruction low-pass filter and Hi_R is the reconstruction high-pass filter.


See Also
idwt, upcoef, wavedec

  upcoef2 upwlev2