Stuff we've discussed on IRC.
Posted by ats at 2011-09-12 21:04
RTTY is a (very old) protocol for sending text over radio signals.
In this Doctor Who episode, there are a couple of scenes where there's some RTTY audible in the background (probably chosen just because it sounds 60s-ish and technological, rather than intending to convey a message).
Trouble is that people are speaking over it, so even with some careful filtering you can't actually decode very much.
Nonetheless, in the lecture theatre scene ("How did you get into the command module?"), the words COMPARED and YOUNG can be decoded.
Here's the whole of that scene to put those in suitably gibberishistic context.
There's also a (louder) bit when he activates the transmitter, which decodes to YOU <figure shift>.
There are lots of variants of RTTY; this is Baudot, 45.5 baud, 170 Hz shift, 900 Hz centre, which is what amateur radio programs usually default to.
Now, excuse me while I go and do something non-geeky to make up for that...