Method of Adaptive Interpolation Filtering in Video Coding

摘要

A method and apparatus of adaptive interpolation filter for motion compensation with fractional-pixel accuracy are disclosed. Embodiments of the present invention generate interpolated reference samples at non-integer locations based on existing reference samples in a reference block by using an interpolation filter set adaptively according to pixel location and/or pixel characteristics.;A current block is then encoded or decoded using a temporal predictor including the interpolated reference samples. The adaptive interpolation filter can be applied to the prediction unit (PU). In one embodiment, the interpolation filter set consists of interpolation filters having different filter lengths. An interpolation filter with a longer tap length is applied to generate interpolated reference samples farther from the block boundary and an interpolation filter with a shorter tap length is applied to generate interpolated reference samples closer to the block boundary.

主权项

1. A method of interpolation for motion compensation with fractional pixel accuracy in a video coding system, the method comprising:
receiving input data associated with one or more current blocks in a current picture; determining one or more current MVs (motion vectors) associated with said one or more current blocks; locating one or more reference blocks in a reference picture according to said one or more current MVs; and for each of said one or more current MVs, if one current MV corresponds to a fractional-pixel location:
generating interpolated reference samples at non-integer locations based on existing reference samples in one reference block by using an interpolation filter set adaptively according to pixel location and/or pixel characteristics, wherein the interpolation filter set consists of multiple interpolation filters; andencoding or decoding one current block using a temporal predictor including the interpolated reference samples.