Linear Scaling Electronic Structure Methods

A motion compensation circuit comprises finite impulse response (FIR) filters divided into N groups according to N subbands of input video signal samples. One of the FIR filters of each group receives a delayed version of the subband of the group, and the remainder of the group receives a delayed version of one or more of the subbands which are adjacent to the subband of the group. Each FIR filter has tap-weight multipliers controlled in response to an estimated motion vector for shifting sample points of each subband. N adders are provided corresponding respectively to the N groups of FIR filters for summing the outputs of the FIR filters of the corresponding groups to produce N motion compensation signals.

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