Fig. 2From: An optimized two-level discrete wavelet implementation using residue number systemMulti-resolution wavelet decomposition. The block diagram of the two-channel two-level discrete wavelet transform decomposition (J=2) that decomposes a discrete signal into two parts. Note that ↓2 is keeping one sample out of two; a i and d i are the approximation and details at level i, respectivelyBack to article page