HIGHER-ORDER MOTION MODELS AND GRADUATED MOTION PARAMETER ESTIMATION FOR VIDEO CODING

摘要

Systems, methods, and instrumentalities are disclosed for higher-order motion models and graduated motion parameter estimation for video coding. Motion compensated prediction may be performed on a block level using one or more orthogonal basis functions (e.g., Legendre polynomial functions). A motion parameter count indication associated with a current block may be received. An order of an orthogonal basis function for motion modeling associated with the current block may be determined. The order of the orthogonal basis function may be determined based on the motion parameter count indication. Motion parameter values for the orthogonal basis function associated with the current block may be determined, and the current block may be predicted based on the orthogonal basis function having the determined motion parameter values.