Non-Separable Wavelet-Like Lifting Structure for Image and Video Compression with Aliasing Suppression

Wavelet-based approaches to resolution scalable video are significantly hindered due to the phenomenon of aliasing at reduced spatial resolutions. Improvements to the wavelet filters themselves have limited success, because they are fundamentally constrained by the perfect reconstruction conditions. We propose a packet lifting structure that is capable of perfect reconstruction, yet achieves superior antialiasing performance to improved wavelet designs. While the aliasing removal process incurs some loss of overall compression performance, this is offset by increased compressibility of the lower resolution information. Preliminary results suggest performance competitive with pyramid schemes for achieving similar goals.