METHOD FOR DETERMINING BLOCK VECTORS FOR ESTIMATING MOTION

摘要

During digital video signal processing, the knowledge of position and time modifications in the recorded scene is utilized for data compression and format conversion. In general, expensive computer circuits are necessary for conducting high-precision estimation of motion. The inventive hybrid method comprises simple measures which can be clearly executed and provide a low-cost high-precision estimation of motion. According to the invention, a block vector BV is generated in a number of steps for each block. To begin with, a first modified block matching occurs in order to select a start vector SV from a number of vector candidates VCi. The start vector SV is then refreshed by pixel recursion and used as an additional start vector VCi+1. Finally, a block matching resulting from coordinating the first and second steps in a third step produces the final block vector BV. The block vectors BV are read out for a successive generating of a dense motion vector field and for new vector candidates VCi which are to be intermediately stored.