@conference {Prelcic00a, title = {Design of non-expansionist and orthogonal extension methods for tree-structured filter banks}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2000}, month = {June}, address = {Estambul, Turkey}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} }