Patent ID: 8054380

Claim:
A digital video scaling method for processing an input video signal having respective input image values at points of a space-time input grid to deliver an output video signal having respective output image values at points of a space-time output grid including points of said input grid and new points, the method comprising the following steps for each of said new points: (a) applying a predefined family of parameterized linear interpolators to the input image values in a respective space-time neighborhood of said new point to provide an interpolated value at said new point for each interpolator of said family; (b) estimating an interval of values associated with said new point from the input image values in a space-time neighborhood of said new point, such that a probability distribution of the output image value at said new point is estimated to have a global maximum within said interval of values; (c) computing a loss value for each interpolated value at said new point, based on a second probability distribution which is constant and maximum within the interval of values associated with said new point; (d) filtering spatially the loss value computed in respect of each interpolator of said family, in a spatial neighborhood of said new point; and (e) selecting an interpolator of said family which fulfills a minimization criterion depending on the filtered loss value, wherein the interpolated value for the selected interpolator is taken as the output image value at said new point.