This paper presents a fast motion estimation search algorithm with adjustable predictive quality.Taking advantage of the spatial and temporal correlation of motion vectors

motion estimation of the algorithm is realized by predicting initial search center location

analyzing whether a silent macroblock or not

adjusting windows size

and using progressive block matching measure of adjustable predictive quality

and at the same time

introducing adjustable function to add controllability between predictive quality and searching speed.Experimental results show that the algorithm can reduce computation amount significantly

increase computing speed greatly

provide good reconstructed video quality

and be applied for low bit rate video encoding.