Sticking brakes

I have a 2003 accord and the rear brakes have been sticking. the pads in the back are worn becase of the new material but i already know how to replace them. my rear brakes grind when i drive even if i don't step on the brakes. does anyone know how to fix the calliper problem? my front two are abs and i believe the back two are e brake. i think the problem is that they are not releasing completly, i also don't know if they're rebuildable or not. if anyone can help i would appriciated it.