Patent ID: 6304605
Filing Date: 2001-10-16
Classification: H04N

Abstract:
A video compression method, in which a video picture is divided into blocks containing several pixels and in which the picture information of each block is formed by the value information of that block's pixels, comprising, in order to code the picture information of a block, the steps of:deriving block pattern information from the picture information of the block, by defining the direction and location of a contour inside the block relative to the borders of the block and by forming a pattern information code from a direction code corresponding with the direction of the contour and a location code corresponding with the location of the contour,deriving value information connected with the block pattern information from the picture information of the block,assigning a value information code to the derived value information,preparing a relatively small group of block pattern models beforehand, and assigning a relatively short code for each block pattern model prepared,searching for a block pattern model that most resembles the pattern of the block, as defined by its derived block pattern information, from among the relatively small group of block pattern models,setting the relatively short code assigned for the block pattern model that most resembles the pattern of the block as the pattern information code for the block, andcombining the pattern information code for the block with the value information code.