Nonorthogonal Wavelet Packets
Charles K. Chui, Chun Li · SIAM Journal on Mathematical Analysis · 1993
The notion of orthonormal wavelet packets introduced by Coifman and Meyer is generalized to the nonorthogonal setting in order to include compactly supported and symmetric basis functions. In particular, dual (or biorthogonal) wavelet packets are investigated and a stability result is established. Algorithms for implementations are also developed.