Okay well my dad got a high def TV a few weeks ago and just wanting to know which DVD players would be compatible with it? Or are blue ray players the only compatible ones??

You don't need a blu ray player a regular DVD player will connect with no problem. You might want to look at up converter DVD players they upconvert the signal to 1080I or 720P you can pick. I have an up convert DVD player and it works great. Here is a link to one. Amazon.com: Samsung DVD-1080P8 1080p Upconverting DVD Player: Electronics