Frame rate up-conversion is useful for low frame rate pictures such as movie. In case of conversion, basic motion compensation causes gap at covered area and uncovered area. To avoid the gap, we propose the motion compensation centered at the position of target. Fully motion compensated interpolation is possible in this method. To realize this, error normalizing by block activity is used for motion estimation. We also propose the adaptive interpolation by using four frames. Finally, we compare the original picture with the interpolated picture converted from decimated picture. The proposed conversion method gives 5dB better at the maximum PSNR than the conventional method.