Adpative dense vector field interpolation for temporal filtering

Inloop filters are a well known tool to improve the compression performance of hybrid video codecs. These filters generally work in the spatial domain. If temporal filters are used instead, their performance strongly depends on the available motion data. In this paper a new method to retrieve accurate motion information per pixel is introduced and evaluated within the HEVC test model HM 8.0. The interpolated motion vector field is significnatly closer to the real object motion than the block-based motion data. An average bit rate reduction of 0.4% is observed with a maximum reduction of 2.0%.