I can't elaborate on it right now as it's pretty late, but I'd recommend using the following Avisynth filters and functions:Denoising with MVDeGrain2 nnediresize2x for 2x enlargement on both horizontal and vertical axisSpline36Resize for resizing to final resolutionLimitedSharpenFaster with SMode=4 and Strength between 200 and 300In that order Report