M-band compactly supported orthogonal symmetric interpolating scaling functions

In many applications, wavelets are usually expected to have the following p roperties: compact support, orthogonality, linear-phase, regularity, and in terpolation, To construct such wavelets, it is crucial designing scaling fu nctions with the above properties. In two- and three-band cases, except for the Haar functions, there exists no scaling function with the above five p roperties, In M-band case (M greater than or equal to 4), more free degrees available in design enable us to construct such scaling functions. In this paper, a novel approach to designing such scaling functions is proposed. F irst, we extend the two-band Dubuc filters to M-band case. Next, the M-band FIR regular symmetric interpolating scaling filters are parameterized, and then, M-band FIR regular orthogonal symmetric interpolating scaling filter s (OSISFs) are designed via optimal selection of parameters. Finally, two f amily of four-band and five-band OSISFs and scaling functions are developed , and their smoothnesses are estimated.