My uncle pauses FOREVER, and it's a bad idea. What I do is just press record if it is LIVE TV and turn the channel if I don't want to see spoilers while I need to do something else or for watching a DVR recording, after pausing, I just dump out of it and into LIVE TV and then I am done with whatever, I just press the RECALL button, and the DVR recording I was watching will appear pretty much from where I left off, I always skip back like 30 seconds to account for the now INEXACT place it bookmarks.
What you are asking for does not exist.