Patent ID: 8155460

Claim:
An image information decoding apparatus for decoding, by inverse-orthogonal transform and motion compensation, an image compressed information at least including intraframe encoding image, interframe forward predictive encoding image and interframe bi-directional predictive encoding image which have been generated at an image information encoding apparatus, the image information decoding apparatus including a processor comprising: a motion compensation unit configured to perform, at the processor of the image information decoding apparatus, motion compensation processing by using a first filter with respect to the interframe forward predictive encoding image, wherein the motion compensation unit performs interpolation processing of 1/2 pixel accuracy by using the first filter having 8 taps and performing interpolation processing of 1/4 pixel accuracy by another filter having 8 taps, and the motion compensation unit performs motion compensation processing by using a second filter having a fewer number of taps than the first filter, with respect to the interframe bi-directional predictive encoding image.