Video coding with fully separable wavelet and wavelet packet transforms
Maria Trocan, Béatrice Pesquet‐Popescu · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2007
Three-dimensional (t+2D) wavelet coding schemes have been demonstrated to be efficient techniques for video compression applications. However, the separable wavelet transform used for removing the spatial redundancy allows a limited representation of the 2D texture because of spatial isotropy of the wavelet basis functions. In this case, anisotropic transforms, such as fully separable wavelet transforms (FSWT), can represent a solution for spatial decorrelation. FSWT inherits the separability, the computational simplicity and the filter bank characteristics of the standard 2D wavelet transform, but it improves the representation of directional textures, as the ones which can be found in temporal detail frames of t + 2D decompositions. The extension of both classical wavelet and wavelet-packet transforms to fully separable decompositions preserve at the same time the low-complexity and best-bases selection algorithms of these ones. We apply these transforms in t + 2D video coding schemes and compare them with classical decompositions.