Patent ID: 9078005
Filing Date: 2015-07-07
Classification: H04N

Abstract:
1. An image information decoding apparatus for decoding, by inverse-orthogonal transform and motion prediction and compensation, image compressed information at least including an intraframe encoding image, an interframe forward predictive encoding image and an interframe bi-directional predictive encoding image which have been generated at an image information encoding apparatus, the image information decoding apparatus comprising: a motion predictor and compensator, including a processor, configured to perform motion prediction and compensation processing based on different interpolation methods with respect to the interframe forward predictive encoding image and the interframe bi-directional predictive encoding image, wherein the motion predictor and compensator is configured to perform motion prediction and compensation processing by using a first filter with respect to the interframe forward predictive encoding image and to perform motion prediction and compensation processing by using a second filter with respect to the interframe bi-directional predictive encoding image, wherein the first filter uses coefficients of a first number of taps and the second filter uses coefficients of a second number of taps, wherein the second number of taps is less than the first number of taps, and wherein the motion predictor and compensator is configured to perform motion prediction and compensation processing by using the first filter having the coefficients of 8 taps with respect to the interframe forward predictive encoding image and by using the second filter having the coefficients of 6 taps with respect to the interframe bi-directional predictive encoding image.