| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the encoding device of a moving image, which reduces the operation cost and improves the encoding efficiency. <P>SOLUTION: An image encoding method includes the steps of: a predicted image for an encoding object pixel block is generated, on the basis of a selected predicted mode; an optimum predicted mode is determined, on the basis of a prediction error between an input image and the predicted image, and the code amount of the predicted mode; the order of the selection frequency of the predicted mode indicating the selection frequency of the predicted mode is rearranged by the determined predicted mode; the index of a rearranged frequency information table is generated; for the encoding object pixel block, predicted mode information is extracted from the index; a predicted image signal corresponding to the extracted predicted mode information is generated; the cost of the predicted mode is calculated; one encoding mode is selected from the cost; and prediction error signals, the table length of the frequency information table, and an index number indicating the selected encoding mode are encoded according to the selected encoding mode. <P>COPYRIGHT: (C)2010,JPO&INPIT |
