At a Goldman Sachs interview on Tuesday, News Corp. chairman Rupert Murdoch and NBC Universal CEO Jeff Zucker indicated that Hulu may adopt a subscription service in the future. This is not a new idea for the online video service, as involved execs have previously embraced the thought of a pay plan. Recent developments suggest it may be more than just a vision, however.

Sources have supposedly confirmed that Hulu is already internally beta testing a subscription video model. They are said to be working on the technical requirements, and more specifically, how the authentication piece of a subscription-based service would work.

While it may be ironing out the technical details, there is no hint at when Hulu might introduce the service -- you can only draw so much speculation off the fact that they are testing internally. tried to get a comment from Hulu, but they have yet to respond.