Patent ID: 9451266
Filing Date: 2016-09-20
CPC Classification: H04N

Claim Text:
1. A video codec comprising a control circuit configured and arranged to calculate minimal activity direction based on texture gradient distribution, the minimal activity direction being defined by a vector (α(B, W), β(B, W)) indicating minimal variation of a discrete function P(x, y) inside a spatial area of block B with weights W; the vector (α(B, W), β(B, W)) being a solution of a minimization problem: wherein P(x, y) is a discrete function defined at a rectangular set of integer pairs: R= {0,N−1} × {0,M−1} in N×M frame; S is a set of integer coordinate pairs (x, y), where S ⊂ R; W(x, y) is a set of non-negative weight coefficients defined at a point (x, y)εS; D wherein