Patent ID: 8942505
Filing Date: 2015-01-27
Classification: H04N

Abstract:
1. A method of encoding a group of image elements in a frame of an image or video sequence, said method comprising the steps of: a) estimating, based on property values of said group of image elements, a parameter representation associated with a reference group of image elements in a frame, wherein the parameter representation comprises a motion vector pointing towards the reference group of image elements; b) providing a filter applicable to reference property values of said reference group of image elements; c) providing a differential filter having fixed filter coefficients; d) determining, based on said differential filter, said filter, said property values and said reference property values, a filter gain applicable to a filter obtainable based on said differential filter; e) calculating a residual error based on said property values, said parameter representation, said filter, said filter obtainable based on said differential filter and said filter gain; and f) providing a representation of said parameter representation and a representation of said residual error as an encoded representation of said group of image elements; wherein said determining step d) comprises determining said filter gain g by minimization of the prediction error E defined as: where S