Thanks, really big thanks for all the explanations guys...but...
dvd 0.3a
Total reversion of the process order so new calculations of the ratios:
*Depending of the input and the output AR, there is a huge speedup compared to other versions (50% with 2.5:1 in 16/9, 100% in 4/3 !!!)
*Better quality near the added borders (this "kindofsubsamplingartifact" isn't present anymore)
*Maybe Nominal Analogue Blanking at least right coded?
?