Signal extensions in perfect reconstruction filter banks
Joao C. Silvestre, Luis A. S. V. de Sa · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1996
The wavelet transform is defined for infinite-length signals. In practice we only have finite-length signals, so signals must be extended before they can be transformed. The question is how to extend the signal to minimize signal end effects, or how to find the signal extension that preserves the transform signal length. In this paper we discuss the problem of signal extension in perfect reconstruction filter banks.