Patent ID: 8160161

Claim:
A method for filtering noise in a video encoding process comprising: determining a discrimination value of a filter based on a magnitude difference between a current frame and a prior frame of a sequence of frames; and modifying the current frame using the determined discrimination value; wherein the current frame is modified as follows: g ( i,j,k )= f ( i,j,k )±β in which: f(i, j, k) is the current frame input to the filter; g(i, j, k) is the current frame output from the filter; and β is the discrimination value of the filter; and wherein the discrimination value is determined as follows: β = { κδ ′ + χ , δ ′ = max ⁢ { δ , δ 0 } , δ < δ 1 0 , δ ≥ δ 1 in which: κ and χ are constants less than one; δ is a magnitude difference between the current frame and the prior frame; and δ 0 and δ 1 are constants that satisfy δ 0 ≦δ 1 .