Mike02: bloody hell, that was obscure
edit: but it brought up something interesting. That quote is from here:
Digital Spy Forums - View Single Post - BBC HD has new encoders. Slashes bandwidth by 40% too. but from post 16 onwards there is an exchange with the BBC about Luxe HD that makes me think Luxe is not pre-encoded but uses the software based x.264 encoder. Fancy that!