摘要 |
<P>PROBLEM TO BE SOLVED: To provide an encoding apparatus capable of performing efficiently decoding data made by in-image encoding when color component resolution of an image signal is in 4:2:2 format. <P>SOLUTION: The image information decoding apparatus 80 decodes a bit stream made by encoding an image signal containing a color difference signal by using a predicted image generated by an intra-prediction section 90 which generates a predicted image when performing an in-image prediction decoding of the color difference signal by dividing it into 8×8 pixel blocks if a chroma format signal, which shows the resolution of the color difference signal of the image signal, is in 4:2:2 format, and a prediction mode is DC mode when performing an in-image prediction decoding of the color difference signal, using coefficients obtained by inverse orthogonal transformation, in 8×16 pixel block unit, having 8×8 pixel blocks arranged in longitudinal direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |