|IEEE Transactions on Circuits and Systems for Video Technology (TCSVT)
|Andreas Krutz, Alexander Glantz, Michael Tok, Marko Esche and Thomas Sikora
|Adaptive Global Motion Temporal Filtering for High Efficiency Video Coding
|Coding artifacts in video codecs can be reduced using several spatial in-loop filters which are part of the emerging video coding standard HEVC. In this paper, we introduce the concept of global motion temporal filtering (GMTF). A theoretical framework for a concept combining the temporal overlapping of several noisy versions of the same signal is introduced. This includes a model of the motion estimation error. As an important result it is shown that an optimum number of frames N for filtering exists. An implementation of the concept based on several versions of the HEVC test model using global motion compensated temporal filtering shows that significant gains can be achieved.
|compression, Video coding, higher-order motion estimation, theoretical model, temporal filtering