Entropy encoding video data using reordering patterns

摘要

Video data compression apparatus in which block based video data is reordered and entropy encoded comprises a selector for selecting a reordering pattern from a set of two or more candidate reordering patterns, for use in reordering video data for encoding, at least some of the reordering patterns being arranged so as to interleave video data from plural colour channels and/or plural blocks to form a composite data block. A data scanner then changes the order of the video data for encoding according to the selected reordering pattern so as to generate reordered video data and an entropy encoder for entropy-encoding the reordered video data.