Four Hollywood studios and three major broadcast networks on Thursday said they have filed a suit against Cablevision Systems Corp. to bar the cable provider from offering a new video-on-demand service, alleging copyright violations.

New York-based Cablevision, the nation’s sixth largest cable provider, was set to launch an on-demand service next month that uses a “network DVR” to allow users to compile content off of a central system DVR, instead of the typical set-up that stores programs on individual set-top boxes.

Stating that the service violated their copyrights, News Corp.’s 20th Century Fox, Viacom’s Paramount Pictures, NBC Universal’s Universal Studios, Walt Disney Co. and networks NBC, CBS and ABC filed the federal suit Wednesday in Manhattan.

The companies are alleging the service is illegal and that Cablevision refused pay a license fees or share in the revenues it would collect from the service, and contend that Cablevision needs a separate license to offer the service.

Cablevision, which has about 3 million customers on the east coast, said it had explored the issue earlier and found that it did not violate copyright laws.