Wavelets and Filter Banks
Inheung Chon · Journal of the Korea Society for Industrial and Applied Mathematics · 1997
We show that if an even length filter has the same length complementary filter in a generalized linear phase case, the complementary filter is unique, we find sufficient conditions for a unique existence of even length N complementary filter in a quadrature mirror filter bank, and we find all higher degree symmetric filters of length N + 4m which are complementary to a given symmetric filter of even length N .