Digital video processing

摘要

Digital video processing apparatus is disclosed in which an output compressed video signal is derived from an input compressed video signal; the input compressed video signal representing successive input pictures, in which a subset of the pictures are derived from other input pictures in accordance with a repetitive group of pictures (GOP) structure, using input picture motion vectors; the output video signal representing successive output pictures, in which a subset of the pictures are derived from other pictures in accordance with a repetitive group of pictures (GOP) structure different to or not picture-aligned with that of the input compressed video signal, using output picture motion vectors; the apparatus comprising a motion vector processor for deriving the output picture motion vectors from the input picture motion vectors. <IMAGE>