How does Television work?

[BusyBee]

I must admit I don't know anything much about the modern digital TV but , as far as digital display is concerned, I think the point is about the pixels. They could really be processed in many different ways although it is sensible to think of a sequence of lines as previous. As Jeffrey says, this is done in blocks. I would imagine these are displayed each block being updated, each instantaneously so in practice essentially line and frame update in each block is instant hence combined update so blockiness if it fails. I would also think that the normal practice of video update is used wherin digital memory is written to then this is written to the screen by dedicted hardware. This can have multi parallel interface so, at least in principle, many blocks can be written instantaneously and (theoretically) the whole screen could be updated at the same time with a massively parallel interface. There can be various methods of comparing and checking the signal block by block so error (hence noise / corruption) correction is done digitally. In this I suspect there may be lots of sporadic corruption but with a normal signal minor fluctuations would, I suspect, not be unusual but constantly corrected.

As I said in the first place though, I have no working experience. I just know what is possible but apologies if I wander too much

Tracy