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4K Ultra High Definition Video Coding Using Homogeneous Motion Discovery Oriented Prediction

State of the art video compression techniques use the motion model to approximate geometric boundaries of moving objects where motion discontinuities occur. Motion hints based inter- frame prediction paradigm moves away from this redundant approach and employs an innovative framework consisting of motion hint fields that are continuous and invertible, at least, over their respective domains. However, estimation of motion hint is computationally demanding, in particular for high resolution video sequences. Discovery of homogeneous motion models and their associated masks over the current frame and then use these models and masks to form a prediction of the current frame, provides a computationally simpler approach to video coding compared to motion hint. In this paper, the potential of this coherent motion model based approach, equipped with bigger blocks, is investigated for coding 4K Ultra High Definition (UHD) video sequences. Experimental results show a savings in bit rate of 4.68% is achievable over standalone HEVC.