Patent ID: 7333544

Claim:
A lossless image encoding apparatus, which losslessly encodes a color image using residue prediction between different color image components, the apparatus comprising: a motion prediction image generator estimating motion between a previous image and a current image in units of predetermined sized blocks and outputting a prediction image; a residue generator generating a temporal residue corresponding to a difference between the prediction image and a corresponding block of the current image with respect to different components of the current image; a prediction residue generator generating prediction residues by defining a linear-transformed value of one residue, of the different components, output from the residue generator as a predictor residue and using respective differences between residues of other components, of the different components, and the predictor residue; and an entropy encoder receiving the predictor residue and prediction residues and generating a bitstream by entropy encoding the predictor residue and the prediction residues.