SiS168 adopts an innovative close-loop Multi-state Motion Vector Search & Analysis (MMVSA) algorithm to increase the reliability and accuracy of the regenerated motion vectors. The closed loop MMVSA algorithm includes moving objects grouping, moving object boundary detection, static text detection, motion vector distribution analysis, and motion vector regeneration. The low frame rate films with inverse 3:2/2:2 pull-down is also detected during the motion vector distribution-analysis. Based on the trust-worthy motion vectors, new frame is thus elaborated and inserted between two originally consecutive frames, with further polish such as de-blocking, halo effect reducing, and low frame-rate film-processing.