For more information...
“Obtaining Higher Resolution in Asia”, IEEE Signal Processing Magazine, July 1997, Vol. 14, No. 4
“A Tube for Tomorrow”, Time Magazine, April 14, 1997, Vol. 149, No. 15
National Association of Broadcasters http://www.nab.org/conventions/nab98/index_lo.html
http://www.contrib.andrew.cmu.edu/~bkoh/899/hdtv.html