The company has also signed a deal to put its shows on a new internet TV service from Sony that is expected to debut later this year. CBS joins Viacom, also controlled by billionaire Sumner Redstone, which has cut a deal for Sony to carry MTV, Nickelodeon and 20 other channels on the service.
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"As new entrants, they'll pay higher subscription fees than we've ever been paid before," said Leslie Moonves, CBS chief executive. "Broadband services will help expand the universe of opportunities for companies like CBS to make the best programming."
CBS last month launched its own direct-to-consumer streaming service that allows people to watch many of its shows live or on demand without a cable subscription.
"There are 10m broadband-only consumers out there," Mr Moonves said of the potential reach of the CBS All Access service. He added that he could say "fairly definitively" that an online-only subscription for Showtime, the premium cable network behind Homeland, would be available next year. Rival HBO has said it will sell broadband-only subscriptions in 2015.
It "will allow us to take all of the content we create across our news division and distribute it across the leading digital platforms without the costs associated with a cable news network," Mr Moonves said.