Italy striker Antonio Cassano has left troubled Serie A club Parma after rescinding his contract.
Huddersfield striker Martin Paterson has joined Orlando City on loan until the end of the season.
The 39-year-old will provide cover to England international John Ruddy, who had been a target for Chelsea, and Mark Bunn.
Norwich had needed back-up after Jed Steer left for Aston Villa and Declan Rudd was loaned out to Preston.
Manager Chris Hughton said: "It is now important to us to bring in a 'keeper of great experience and a player that is used to living life in the Premier League.
"The move also allows us to send Declan Rudd out on an extremely valuable season-long loan to Preston where he can get some first-team football under his belt."