24-2 Hierarchical Movement Estimation for HDTV Signals

Abstract

The movement estimation has been widely used for many HDTV signal prosessing areas such as bandwidth reduction, field rate conversion, and so on. But in most of the conventional movement estimation algorithms, the measuring range of motion vector is limited about 6 pixels per frame. If the movement is large it is difficult to estimate motion vector accurately, so the performance degrades heavily. This paper describes a movement estimation algorithm using the hierarchical combination of the pyramidal pel recursive algorithm and simple block matching algorithm. The proposed algorithm shows good performance especially for large movement image.