| With the em ergence of advanced display m edia as well as digital video coding and com pression schem es ca me a variety of new video for mats, video format conversion has becom e a key technology in the related field. Fram e rate up conversion algorithm has important status in video format conversion, it is prim arily used to achieve the conversion between different fra me rate. On the ba sis of existing frame rate up conversion technology, consulting the rated literature algorithm at home and abroad, we propose a new algorithm.(1) This a lgorithm uses three o rmore consecutive pictures, instead of the conventional two, and one previously estim ated motion field as the input to exploit the temporal correlation between m otion fields and to determ ine motion in occluded areas.(2) This p aper app lies the m aximum a poster ior p robability(MAP) in the mathematic area to the multi-fram e estimation algorithm. It combine the accuracy of MAP estim ation with the speed of hierar chical block-m atching algorithm (BMA). The experim ental results show that this algorithm has faster speed on the condition that has high accurate motion vectors.(3) W e apply the m ulti-frame estim ation algorithm to the f rame rate up conversion. After gettin g m otion vectors, vect or m edian filter is applied to sm ooth motion vector filed as well. W hat’s m ore, stratified b lock erosion is introdu ced to reduce the’block spot’. At last, the missing frame can be interpolated with the median filter m otion com pensation technology. This algorithm can achieve m ore precis ion motion vector field, pres erve the whole structure of the m otion object. The experimental results show that the proposed scheme has better visual quality. |
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