问题：
What is the Grand Alliance (GA)?
答案：
The United States' grouping, formed in May 1993, to produce "the best of the best" initially proposed HDTV systems. The participants are: AT&T, General Instrument Corporation, Massachusetts Institute of Technology, Philips Consumer Electronics, David Sarnoff Research Center, Thomson Consumer Electronics and Zenith Electronics Corporation. The format proposed is known as the ATSC format.
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常见问题 ID 53516
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