DESIGN OF CHECKERBOARD-DISTORTION-FREE MULTIDIMENSIONAL MULTIRATE FILTERS

This paper discusses a design technique for multidimensional (M-D) mul tirate filters which cause no checkerboard distortion. In the first pa rt of this paper, a necessary and sufficient condition for M-D multira te filters to be checkerboard-distortion-free is derived in the freque ncy domain. Then, in the second part, this result is applied to a scan ning line conversion system for television signals. To confirm the eff ectiveness of the derived condition, band-limiting filters with and wi thout considering the condition are designed, and the results by these filters are compared. A reducibility of the number of delay elements in such a system is also considered to derive efficient implementation .