Color image encoding and decoding method and apparatus using a correlation between chrominance components

A decoding method for decoding a color image, the decoding method comprising:

• entropy decoding an input bitstream;
• and
• recovering 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 is 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.

A computer-readable recording medium having embodied thereon a computer program for performing a decoding method for decoding a color image, the decoding method comprising:

• entropy decoding an input bitstream;
• and
• recovering 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 is 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.