Half-pixel processing apparatus of macroblock for motion compensation of

Abstract

A half-pixel processing apparatus of a macroblock for motion compensation of a moving image in which NxN pixel data selected for the motion compensation of the moving image is divided into a predetermined unit and half-pixel processed. The half-pixel processing apparatus includes a first unit which sums successive pixel data constituting the N kinds of pixel data and pixel data horizontally adjacent to the successive pixel data constituting the N kinds of pixel data according to a horizontal half-pixel processing signal which is input from an external source. A pipeline unit sequentially stores and outputs the data applied from the first unit. A second unit sums the pixel data output from the pipeline unit and pixel data vertically adjacent to the pixel data output from the pipeline unit according to a vertical half-pixel processing signal which is input from an external source. A data processor half-pixel processes the data applied from the second unit and has the data pass through according to the horizontal half-pixel processing signal and the vertical half-pixel processing signal. Flip-flops divide the data applied from the data processor according to a clock pulse and store the divided data. Multiple-xers select and output data necessary for motion compensation among the data output from the flip-flops.