Motion compensation for video format down-conversion by an arbitrary ratio

摘要

The efficient motion compensation apparatus for digital video format down-conversion with variable conversion ratio is disclosed. The apparatus is characterized by an interpolation and decimation filters derived using a number of orthogonal transforms with variable transform sizes and implemented using efficient computation architectures. The computation architecture comprises the orthogonal transform kernel selection means, frequency component computing means, coefficient weighting means and pixel reconstruction means. A simple architecture for both interpolation and decimation filtering processes has been invented. The result is the dramatic reduction of the shifting and adding/subtracting operations, making them suitable for implementation in LSI realization of the video format down-conversion of digital video systems.