How do you mean? Video scalers use n-order tap filters, which resemble conversion to analogue, analogue bandwidth reduction and then conversion to digital again (although with a lot less distortion then with actual conversion to-from analogue). You wouldn't want to use a discrete scaling, that looks horrible!from my point of vision we miss some user changeable option to able choose diffrernt upscaling methods
like vertical pixels x2 or x3
horisontal x2; x3; keepAspectratio
I don't exactly understand what you mean. The stb adds black borders to resolve the aspect ratio of the source to that of the destination, is that what you mean? Over hdmi/dvi that's actually what you want, because most tv sets do not support aspect ratio metadata over hdmi, although it's defined in the standard.another way to destroy SD quality is send received 4:3 SD through HDMI SD mode with added side blackbars,
picture then downscaled with pixels lose ~20%
this war i have won DMM Board » Enigma 2 - Feature Requests » [SOLVED 99%] DVI(HDMI) can't handle most used aspectratio
I think the phenomenon that HD channels add black borders on 4:3 material is far more severe. These black borders are encoded, transmitted and take up valuable bits in the stream while they carry no information. H264 supports random aspect ratios and also all stb's I know can scale these random aspect ratios to match the tv's, so technically there is no reason to use black borders in broadcast material.