As far as I know there are three solutions:
Turn them off (not really a solution).
Use a HTPC with Theatertek
player. This software player can move the subtitles up. There might be more than this software that can do this, but the principle is the use of a HTPC.
Use a Samsung DVD player with "ezview" feature. CAVX has a description of how to do this
on his website. Just scroll down a bit and there is a passage that explains this.
As far as my own experience I have tried solution 1 and 2.
Solution 1 had a few problems when it came to films with dialogue that I couldn't understand. English and nordic languanges is easy enough, but as soon as we get into french, spanish, asian and so on dialogue I'm lost.
Soluiton 2 have been in use for a few years in my setup, but to be honest I would really like to get rid of the HTPC in my home theater. It does a good job, but with BluRay I haven't had the motivation to start building a new HTPC. Getting a CIH setup with a HTPC and BluRay up and running is not as easy as a DVD setup with the lack of a player that can do what Theatertek can. The fact that I also spend more or less a full workday in front of a computer every day at work has also reduced the motivation to start tweaking a new HTPC for my home theater.
I have tried scaling to keep the part with subtitles in the active part of the picture used for 2.35:1, but I couldn't stand the proportions of the picture being all messed up. It might work for you, but to be blunt I haven't spent this much time and money on my setup to watch a film with every actor looking a bit short and chubby
Not to mention that for me the whole idea of going 2.35:1 CIH was to get rid of the black bars. Scaling to keep subtiltes outside the active picture on screen would bring back a black bar and I'm back to square one.
As of today I'm going with solution 1 for BluRay and most DVDs. If there is a need for subtitles I use my old HTPC for DVDs. No current solution for BluRay.
I was hoping for a solution from Oppo with the latest player, but as far as I can find out the feature for moving subtiltes was tested but didn't make it to release firmware. Hopefully they can make it work, as an Oppo player with the the option of moving subtitles and 480i/576i over HDMI would make me order one in a second. It would make a great DVD transport.
I have been contemplating looking for a used Samsung player with the mentioned ezview function to try out soulution 3 as used by CAVX, but no luck so far. The new players also have ezview listed as a feature, but I haven't tested one. Maybe it's time to just bite the bullet and buy a cheap Samsung player and see what it can do?
Long answer to a short question, but hopefully you can make some sense of it. There really isn't any easy solution to what we are looking for. It can be done but I feel that all the solutions has some drawback. I'm hoping for Oppo to come to the rescue.......