This can definitely be done in DVDA - I'm trying to remember the exact steps, but it involves the Outline tool (the "O" next to the italic icon) and Color Set 4.
It was a while ago, but I did some nice semi-transparent backgrounds. Have a play with these tools.
"Any possibility of having black "stripes" behind the white subtitles in DVDA?
Do I have to add black area to the video in Vegas to get this? It does not seem to be the optimal solution. (Most TV-networks have black stripes.)"
There was another thread that might interest you discussing various options. When you talk about broadcast you're talking about Closed Captioning in NA, Teletext I believe in Europe. The black background AFAIK is done that way in hardware because of the crude text rendering -- really isn't necessary with subs IMHO because each letter can be effectively shadowed when rendered to a sub track on your PC.
As someone who's often reliant on CC, my personal experience is that I find the black backgrounds much more distracting; they do not make it easier to read.
Thanks for input. Perhaps I can stick to "default".
I will make trials with both "striped" and default subtitles. The target group for this DVD is 55+ so I might have to select a very "crude" fontsize also. Also gotta make the US narrator to speed down his machine-gun talk... :) Lots of stuff to think of (in addition to the translation to 4 langs. and dubbing in 2 langs...)