Low tech TVs

[Vrock]

In my understanding of EE, you can't modulate a purely digital signal through EM waves. Neither antenna will work well because of the discontinuity of the signal.

So....how's it transported then?

like this

Apparently it uses 10% of the energy NTSC does for a given coverage area.

So the answer to this question:

Is it a digital stream modulated into an analog carrier (like how Dolby Digital worked on Laserdisc), or is it pure digital?

is the former.

[SlyFerret]

There are of course more ways to modulate a digital signal. I think the types that my friend was trying to explain to me were QAM and QPSK.

That was a great explaination of the 8-VSB modulation.

Thanks!

-SF