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The quality control for video coding usually absents from many traditional fast block motion estimators. In this letter, a novel block-matching algorithm for fast motion estimation named the adjustable partial distortion search algorithm (APDS) is proposed. It is a new normalized partial distortion comparison method capable of adjusting the prediction accuracy against searching speed by a quality factor . With adjustability, APDS could act as the normalized partial distortion search algorithmdoi:10.1109/tcsvt.2002.808091 fatcat:gnzsalseibgj7hlmp7hf3csuxa