COMPRESSION OF PICTURE

摘要

PROBLEM TO BE SOLVED: To provide a video compression coding method that addresses a tension between a small block size required for effective prediction and a large block size required (especially at high definition) for effective transform coding gain, and also addresses the issue of efficient processing of prediction methods.SOLUTION: Differences between input picture values and picture prediction values are transformed in a transform block, and the differences are formed in a series of parallel steps. A first step conducted in parallel in accordance with a first subset of pixels uses prediction values based wholly on previously processed blocks. The first subset of pixels may include anchor pixels which are not contiguous with any previously processed block. A second step conducted in parallel in accordance with a second subset of pixels includes pixels which are predicted from pixels of the first subset.