CBS Corp. has launched a $5.99-per-month digital streaming service, providing users current and previous-season TV series, local CBS stations from the top markets live, and classic shows on-demand.

hboDubbed CBS All Access, the service is available through the CBS.com website or apps for mobile devices.

"This new subscription service will deliver the most of CBS to our biggest fans while being additive to the overall ecosystem," said CEO Les Moonves.

HBO, meanwhile, announced plans to offer a standalone streaming service, offering its premium content for the first time to viewers without a cable or satellite TV subscription.

Richard Pleper, chairman and CEO of HBO parent Time Warner, announced the plans at an investor meeting Oct. 15. "That is a large and growing opportunity that should no longer be left untapped," he said of digital subscribers. "It is time to remove all barriers to those who want HBO."

Pleper noted there are 80M homes without HBO and "we will use all means at our disposal to go after them." HBO currently offers its HBO Go streaming service to its TV subscribers.

Derek Thompson of The Atlantic said the moves by HBO and CBS, announced a day apart, show "the cable bundle has unraveled more the last 24 hours than in the previous 24 months."