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Comparison of 1- and 2-D autocorrelation-based phase-shift estimators for the temporal quadratic weighted motion filter. The optimized 2-D autocorrelation and optimized 1-D autocorrelation both use five prereference tracks (−0.5 to −0.1 ms) weighted 1 and seven postreference from 0.4 to 1.0 ms after the simulated ARFI push weighted 0.001, 0.005, 0.01, 0.05, 0.1, 0.5 and 1.
