Five Systems Compete To Set HDTV Standard

SEVERAL proposed high-definition television systems are currently being tested at the Advanced Television Test Center, an industry-sponsored facility in Alexandria, Va. Next year, the Federal Communications Commission plans to select a system created by one of the following consortia - or perhaps a hybrid system - as the broadcast standard:

* NHK (Japan Broadcasting Corporation) - a system that uses analog technology.

* General Instrument Corporation, Massachusetts Institute of Technology - using digital technology.

* Zenith Electronics Corporation, American Telephone & Telegraph Company - using digital technology.

* Philips Electronics, Thomson Consumer Electronics, NBC, David Sarnoff Research Center - using digital technology.

* General Instrument Corporation, MIT - a second digital system.

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