An implementation of a low-power motion estimator dedicated to MPEG2 MP@ML is proposed.It adopts an improved multi-resolution telescopic search algorithm with low complexity.For the coarse search procedure

a new two-stage method

in which motion track search is conducted followed by adaptive telescopic search

is used instead of the unitary conventional telescopic search.In addition

the two-stage search can be early ended in accordance with the motion situation.Simulation results show that

compared with the conventional algorithm

the new algorithm reduces the computational load to only 30% while maintains same quality of the decoded pictures.To accelerate the two procedures of coarse search and motion vector refinement

a systolic array and an array of improved tree architecture are devised.Techniques such as clock gating and operand isolation are used to reduce the power consumption of the motion estimator.