Madison Square Garden

AT&T Inc. has filed a complaint with federal regulators charging that Cablevision Systems Corp. is violating federal law by denying AT&T's video customers in Connecticut access to Cablevision's New York area sports programming in high-definition format.

In a filing with the Federal Communications Commission, AT&T alleges that Cablevision is acting in an unfair and anticompetitive manner by denying AT&T U-verse, a competing video service, access to the high-definition format of its Madison Square Garden networks.

Hoping to continue building momentum for its Silverlight technology, Microsoft announced Monday that major content providers are coming aboard and it unveiled a new digital-rights management (DRM) system.

The announcement, at the National Association of Broadcasters show in Las Vegas, said Silverlight technology will be used by Madison Square Garden Interactive, Tencent, Abertis Telecom, Terra Networks Operations, SCSi, MNet, and Yahoo Japan.

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