Patent ID: 6229917
Filing Date: 2001-05-08
Classification: G06T,H04N

Abstract:
A computer-implemented method for coding a block of pixels of a digitized video image using a selectable one of a plurality of coding functions, comprising the steps of:establishing adjustable selection criteria for selecting a coding function;measuring a predetermined characteristic of the block to obtain a characteristic value;selecting a coding function based on said adjustable selection criteria and said characteristic value;coding the block according to said coding function to obtain a coded block;performing a quality measurement of said coded block comprising the steps of:selecting a decoding function independent of selecting said coding function;decoding said coded block to obtain a decoded block; andperforming a quality measurement of said decoded block;adjusting said adjustable selection criteria for selecting a coding function utilizing said quality measurement such that quality measurements of subsequent blocks are improved;accumulating an historical record of detected characteristics of blocks and selected decoding functions; andadjusting said adjustable selection criteria based on said historical record.