Interpolation filter for inter prediction apparatus and method for video coding

Abstract

The invention relates to an apparatus (144) and method for inter prediction of a sample value of a current full-integer pixel of a plurality of pixels of a current block of a current frame of a videosignal. The apparatus (144) comprises a processing unit configured to: determine a motion vector of the current full-integer pixel on the basis of the current frame and a reference frame of the videosignal and / or on the basis of a motion compensation model; determine for the current full-integer pixel a corresponding sub-integer pixel in the reference frame on the basis of the motion vector of the current full-integer pixel; generate on the basis of a predefined set of filter support pixels in the current frame a set of corresponding filter support pixels in the reference frame, wherein the predefined set of filter support pixels in the current frame comprises one or more neighboring full-integer and / or sub-integer pixels of the current full-integer pixel; determine a respective sample value of the corresponding sub-integer pixel of the current full-integer pixel and the corresponding filter support pixels in the reference frame; and determine the inter predicted sample value of the current pixel in the current frame by applying a spatial high- pass filter to the sample value of the corresponding sub-integer pixel of the current full- integer pixel in the reference frame and to the sample values of the corresponding filter support pixels in the reference frame. Moreover, the invention relates to an encoding apparatus (100) and a decoding apparatus comprising such an inter prediction apparatus (144).

Description

technical field [0001] The present invention relates generally to the field of video coding. More particularly, the present invention relates to an interpolation filter and a video encoding method for an inter prediction device, and an encoding device and a decoding device including such an inter prediction device. Background technique [0002] Digital video communication and storage applications are implemented by a variety of digital devices such as digital cameras, cellular radiotelephones, laptop computers, broadcast systems, video conferencing systems, and the like. One of the most important and challenging tasks in these applications is video compression. Video compression is a complex task constrained by two mutually restrictive parameters (compression efficiency and computational complexity). Video coding standards such as ITU-T H.264 / AVC or ITU-T H.265 / HEVC provide a good trade-off between these parameters. Therefore, almost all video compression applications mus...

AI Technical Summary

Problems solved by technology

The current accuracy of interpolation filtering for non-translational motion models needs to be improved

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