the encoding parameter s 123 while the block reconstruction s 115 utilizes equation 0 2 in step s 126 to calculate the encoding cost in step s 126 the encoding costs for all the allowable pre diction modes are computed and use equation 0 1 to determine the optimal prediction method moreover the reconstructed block is stored into the reconstruction image s 102 and then proceed to the encoding of the next macro block detection of image data to be skipped can be used to decide the feasibility of the prediction mode prior to the calculation of encoding costs and is therefore able to prevent a large amount of redundant computations in mode decision and also reduce the operational power consumption of a practical circuit during a coding process fig2 illustrates a flowchart for a data skipping coding method used in a video encoder in a preferred embodiment of the present invention in step s 201 basic block data is retrieved from macro block data to be encoded in step s 101 while in step s 202 the predicted skipping displacement of the coding block is computed in step s 203 the prediction data corresponding to the predicted skipping displacement is retrieved from the reconstruction image s 102 in step s 211 the block data obtained from step s 201 and step s 203 is divided into luminance blocks and chrominance blocks where the definitions of luminance and chrominance are determined by coding standards fig3 shows a possible way to partition.