APPARATUS AND METHOD OF INTERPOLATIONING CHROMA SIGNAL FOR MINIMIZATION OF CALCULATION LOAD

摘要

A method and an apparatus for interpolating a chroma signals for minimizing a calculation amount are provided to obtain center points within a reference partition and perform linear interpolation configured with subtract and multiply through the obtained center points, thereby significantly reducing an operation amount. By rounding an average value of four integer samples in one interpolation block, a first center point located in the center of the integer samples. A half-pel located in row and column directions among the four integer samples is obtained by rounding the average of integer samples belonging to each row and each column. A second center point located in the center between the first center point and the four integer samples is obtained. By using the integer samples and the obtained half-pel, a quarter-pel is obtained. By using the integer samples, the half-pel and the quarter-pel, an eight-pel is obtained in a cross direction.