| 摘要 |
A system for generating motion vectors (MV) in the framework of a motion estimator is configured for co-operating with an engine for calculating estimation error for generating motion vectors (MV), according to estimation errors and/or motion vectors previously generated. The system comprises a program memory (40), which is able to contain program data for a motion-estimation algorithm to be executed, as well as a motion-vector memory (42), which is able to contain data identifying said motion vectors previously calculated. The system further comprises an arithmetic and logic unit (46) co-operating with the aforesaid program memory (40) and motion-vector memory (42), with the possibility of generating motion vectors (MV) in a programmable way so as to get them to correspond, for example, to predictors deriving from motion-estimation operations already performed on the macroblocks of the reference frame or on the previous macroblocks of the current frame, as updates calculated using the coordinates of the motion vectors already issued for the current macroblock, or again as absolute motion vectors, generated as such, taking the components directly from the program code. <IMAGE> |
