IMAGE CODING APPARATUS AND METHOD AND IMAGE DECODING APPARATUS AND METHOD

摘要

FIELD: information technology. ^ SUBSTANCE: image coding apparatus has a converter with increase in pixel depth in bits for converting the depth in bits of each pixel of the input image so as to output a converted input image and output information on conversion in bits indicating the number of bits for which depth changes as a result of the conversion, an image coder for encoding the converted input image so as to output image coding information and a multiplexer for multiplexing information on conversion in bits and image coding information. ^ EFFECT: high coding efficiency owing to high accuracy of intra-frame prediction or compensation for movement. ^ 34 cl, 60 dwg