| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce quality deterioration of a predictive image and suppress reduction of compression efficiency. <P>SOLUTION: In a motion prediction/compensation unit 32, when motion compensation is performed with reference image data and predictive image data is created based on a motion vector detected by motion detection, filter characteristics of an interpolation filter for obtaining image data of small number pixel accuracy in the reference image data of a target block are switched depending on the magnitude of the motion vector. Therefore, by setting characteristics that noise is eliminated in the case that the motion amount is large, or characteristics that filtering process cannot be performed in the case that a reference image includes many high-frequency components such a case that motion vector indicates integer pixel accuracy with little motion amount and little motion blur, deterioration of quality of a prediction image and reduction of compression efficiency can be suppressed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
