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Technology Stocks : General Semiconductor / GENERAL INSTRUMENT

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To: kech who wrote (83)	7/18/1997 12:24:00 PM
From: Robert A. Hawley	of 99

Tom - Just thought I'd provide a piece of data on HDTV transmission. It is possible to fit 2 HDTV channels in a single 6 MHz analog channel slot if you are using 256-QAM modulation. You could fit 1 HDTV channel and a couple SDTV channels in the same slot with 64-QAM modulation or many (6? -> 14 with statistical multiplexing?) SDTV channels in the same slot with 64-QAM and 33% more with 256-QAM. GIC's current boxes do 64-QAM (DCT-1000) and 256-QAM (DCT-1200). Once the cable networks go digital, HDTV transmission should not be a technical problem, just an economic one. No one knows how many people will be willing to pay for added resolution. Rob

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