As the US government wraps-up its antitrust case against Microsoft, that company is slammed with another lawsuit claiming violation of patents and disclosure of trade secrets in the creation of its Corona digital-video playback technology.

The suit, filed by audio- and video-delivery software maker Burst.com, accuses Microsoft of illegally employing Burst’s video-delivery technologies after gaining access to the company’s proprietary information during negotiations with the company.

Microsoft spokesman Jon Murchinson said that the company could not comment on the specifics of the case, given that it has just received the suit and has not had time to review it. He remarked: “Microsoft has innovated with digital-media technologies in Windows for more than ten years.”

Secrets Burst claims that the software giant stole its trade secrets between October of 1999 and December of 2000, while negotiating to use its technologies. The company also alleges that Microsoft used that information to build its recently introduced Corona technology. Corona compresses and decodes digital video, and is reportedly at the heart of Microsoft’s upcoming Media Player, due at the end of 2002.

Burst also alleges that Microsoft urged its technology partners and financial backers not to support its products because they competed with those of Microsoft.

In its suit, Burst accused Microsoft of patent infringement, unfair practices, and violating California state antitrust and trade-secret rules.

Burst claims that it spent over ten years and millions of dollars developing its technologies, and is seeking damages and other remedies.