Patent ID: 8260069

Claim:
A decoding apparatus for decoding an encoded color image, the decoding apparatus comprising: an entropy decoder which entropy decodes an input bitstream; and a chrominance component inverse transformer which recovers original chrominance components based on inter-prediction mode information applied to a current block having a predetermined size, the inter-prediction mode information being extracted from the input bitstream, wherein the inter-prediction mode information indicates an inter-prediction mode which selected from among at least two inter-prediction modes and is applied to the current block, and the original chrominance components are obtained from conversion values corresponding to the inter-prediction mode applied to the current block, wherein the inter-prediction mode information extracted from the input bitstream is a plurality of mode planes into which inter-prediction mode information for a plurality of blocks is classified in each mode, and wherein the inter-prediction mode information extracted from the input bitstream is a transformed mode plane generated by classifying inter-prediction mode information for the plurality of blocks of the predetermined group into a plurality of mode planes in each mode, arranging the plurality of mode planes in a determined order, and transforming information on a next mode plane based on mode information on a previous mode plane.