IMAGE COMPRESSING APPARATUS OF LOSSLESS AND LOSSY TYPE

摘要

PURPOSE: An image lossless/losing compression apparatus is provided to facilitate a chip implementation by lowering the complexity through a DG decoding and a space prediction device. CONSTITUTION: An image lossless/losing compression apparatus comprises the following: a space prediction device(130) inputted with a gradation data regarding a perimeter pixel involved to a specific pixel from a block butter(110); a subtractor(150) subtracting a prediction data regarding the from the specific pixel from the space prediction device, and a graded data inputted from the block buffer; and a decoder(190) adjusting a bit rate regarding a lossless error data by a decoding parameter inputted from a parameter calculator(170).