Digital broadcasting..

[Feek]

This is a very interesting read.

[Pumpkinstew]

Originally Posted by Admiral Huddy

Surely, you can't actually broadcast an elecrical signal that represents digital bits. I was under impression that digital broadcasting requires a higher frequency than that of normal TV and voice. Surely, some kind of D/A or A/D conversion must occur?

What do you think?

In a word yes. The sound (analogue) is sampled and converted to a digital signal (electrical/optical possibly) for broadcast (via EM or optical) it is then returned to an analogue signal (sound waves) by your radio so that your ears can hear it.

You're right that higher frequencies transmit more information (^bits/second) but this can be alleviated by using codecs to transmit commonly used data in a shortened form. Exactly like converting a 200MB wave file into a compressed 8MB MP3.