METHOD FOR IMAGE INTERPOLATION USING ASYMMETRIC INTERPOLATION FILTER AND APPARATUS THEREFOR

摘要

A sub-pel-unit image interpolation method using a transformation-based interpolation filter includes, according to a sub-pel-unit interpolation location in a region supported by interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, individually selecting a symmetric or asymmetric interpolation filter with respect to the interpolation location from among the interpolation filters; and generating the at least one sub-pel-unit pixel value by interpolating the integer-pel-unit pixels by using the selected interpolation filter.