US Patent 10110914 Locally adaptive warped motion compensation in video coding

Encoding or decoding blocks of video frames using locally adaptive warped motion compensation can include determining projection samples for predicting a warped motion of a current block to be encoded or decoded based on a warping model of a neighbor block adjacent to the current block. Parameters of a projection model can be determined based on the projection samples. A prediction block can be generated by projecting pixels of the current block to a warped patch within a reference frame using the parameters of the projection model. The warped patch can be a non-rectangular patch having a shape and a position in the reference frame indicated by the parameters of the projection model.