... pat-tern for fast block motion estimation, ” IEEE Transactions onCircuits and Systems for Video Technology,vol.12,no.5,pp.349–355, 2002.[8] Z. Chen and Y. He, “Fast Integer and Fractional Pel Motion estimation, ” ... refer-ence frames. For the FRFS, if the minimum SAD at layer 2 isover a threshold, MV refinement (Step 3)isnotperformed for its corresponding reference frame. As a result, this FRFSimproves the performance ... novel unrestricted center-biased diamond search algorithm for block motion estimation, ” IEEE Transactions on Circuitsand Systems for Video Technology, vol. 8, no. 4, pp. 369–377,1998.[7] C....