A motion compensated TV standards converter is newly. proposed. In order to estimate motion vectors suitable for field interpolation necessary for field rate conversion, 4 key techniques are utilized, which are prefiltering of input TV signals, improved gradient method applied to hierarchical two-stage motion estimation, post-processing of motion vectors, and digital filtering with many coefficients for line interpolation. From computer simulation experiments, significant, improvement of picture quality is expected, compared to conventional schemes with motion estimation.
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