If you’re using the RCA analog outputs the processing is likely being handled by the Blu Ray player so any AVR will work.
Questions about an AVR
You can't access DTS-HD Master and TrueHD without an AVR, right? I want to be able to access them with Blu-Rays. Does it matter what kind of TV or Blu-Ray player I have, or can they all access DTS-HD Master and TrueHD with an AVR? If not all can, how can I tell which ones can? None of them seem to say. Would I need an external speaker? Obviously I don't know much about this stuff, how complicated would it all be to set up? Are there very complicated things I'd need a professional for?