Pattern Identification Variable Length Code for Pattern Based Video Coding using Co Occurrence Matrix

Very low bit rate video coding using patterns to representmoving regions in macroblocks for block based codingaffords very good potential for improved coding efficiency.A large number of patterns in codebook used in patternbased advanced video coding can better approximate thetrue shape of the moving regions but a larger codebookrequires more bits for pattern identification code whichrestricts the codebook size in actual applications. Instead ofusing fixed length coding a variable length codingtechnique already established its potentiality. In this paperwe proposed a new strategy of pattern identification codewhich also uses variable length code applied on thedifferential positions of patterns instead of patternfrequency after arranging the patterns according to their cooccurrence in video sequence. Experimental results confirmthat new strategy not only requires fewer bits than theprevious approach but also saves memory needed by theprevious approach to store the look up table for patternvariable length codes.