NEW YORK (AP) — Television broadcasters face off at the U.S. Supreme Court on Tuesday with Aereo, a company that offers live TV over the Internet. The case hinges on whether the service constitutes a public performance in violation of copyright law.

Broadcasters want the service shut down. But Aereo argues that its service is legal because each subscriber is assigned an individual antenna to record and watch broadcasts on various gadgets for a monthly fee. Aereo says its service is similar to setting up an antenna and a digital video recorder at home. The only difference, the company says: All the equipment is housed at Aereo’s data centers.