I want to know the answer to the following question:
Who made HDTV official in 1993?
All the background I'm provided with is that "HDTV technology was introduced in the United States in the late 1980s and made official in 1993 by the Digital HDTV Grand Alliance, a group of television, electronic equipment, communications companies consisting of AT&T Bell Labs, General Instrument, Philips, Sarnoff, Thomson, Zenith and the Massachusetts Institute of Technology.". Is that enough to answer the question?