This Paper Appeared in the Proceedings of the Eighth Ieee Digital Signal Pro- Cessing Workshop, Bryce Canyon, Utah, August 1998. on the Study of Diamond-shape Filter Banks and Application in Image Compression

This paper discusses non-separable 2-D filter banks with diamondshape support. The frequency spectrum partitioning is shown to have higher theoretical coding gain than that of the conventional separable approach in image coding application. However, based on the frequency response structure of the subband filters, they can not be implemented with good frequency characteristic although the passband structure is permissible. Some constraints on the passband structure are discussed, and the comparison of the performances between the separable and diamond-shape filter banks is presented. Throughout the simulations, the (9,7) wavelet and its McClellan transformed version are used, respectively, to represent the separable and diamond-shape approaches. Various coding result comparisons are presented.