| 摘要 |
PROBLEM TO BE SOLVED: To encode moving pictures with a low calculation amount while suppressing degradation of the encoding efficiency.SOLUTION: Rough searching means 1 includes first motion searching means 3 for calculating a difference value between a current image pixel and a reference image pixel on a first size block basis and selecting, as a first motion vector, a motion vector for which the cost calculated on the basis of an index obtained from the difference value is minimum, second motion searching means 4 for selecting, as a second motion vector, a motion vector for which the cost calculated on the basis of an index obtained from a difference value calculated by the first motion search means on a second size block basis is minimum, the second size being smaller than the first size, and vector correction means 5 for correcting the motion vector using the cost magnitude relationship between the cost of the first motion vector and the cost of the second motion vector. The searching means 2 includes block size selecting means 6 for determining the block size on the basis of the motion vector selected by fine searching means 2.SELECTED DRAWING: Figure 15 |
