[Benipete]

Originally Posted by entwisi

upscaling - an ancient art perfected over teh last 20 odd years believe it or not

a quick history lesson

in teh begining of cd there was a simple standard

though shal't read cds at 44.1khz

then came the wonderment of oversampling.
Say you had a binary sequence of 111000111

imagine 2x oversampling was to 'add' a digit between each value, in this case its quite easy

1(1)1(1)1(x)0(0)0(0)0(x)1(1)1(1)1

the number in brackets is teh 'added' value. You notice i used x twice. In thsi case teh algorythmn would have looked at teh next couple of numbers and for the first x inserted a 0 and for the second a 1

in 4x oversampling it added '3' numbers so teh first x may have been 100 followed by 001 for teh second.

Now this was easy as audio is effectively 2d. With video its 2d but layered so one line relates directly to teh pixels directly above. In this case teh algorithm is much more complex but still quite simpe in its ultimate aim,

what is either side and can i 'smooth' the transition between them.

Now its more complex as we got into 1 bit dac which is even more complex which i can still explain if you really want but it takes a weird mind to understand it.

So what is upscaling? Its basically 'guessing' what should be there based in what pixels are either side of the one in q!

Hope that makes some sense!

yep:d