Setting Up Kodi 17 – PVR Backend

I have FireTV stick in Samsung TV.
Also Samsung BlueRay Disc Player BD-D5700

Can I use the BD-D5700 as a Kodi Backend PVR hardware.

If not what hardware do I buy to connect to Cable Input feed.

Any guidance on setting up the PVR appreciated.
Bill

PS I have read : PVR (wiki)

PPS I am confused with what actually IS a tvheadend server. Is it :
my BD-D5700 BlueRay reader?
my FireTV (a new App)
a separate NEW box I need to buy?