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Technology Stocks : Qualcomm Moderated Thread - please read rules before posting

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To: Bux who wrote (5129)	12/2/2000 3:08:55 PM
From: John Biddle	Read Replies (2) of 196625

Nope. I didn't do the math but you have forgot about compression which is key for all digital wireless. Even voice is compressed. Even a wimpy 56K phone modem operating at less than optimal speed can reproduce streaming video in color. I'm not talking about the link from the site to the phone, I'm talking about the link between the CPU that runs the browser, which I presume is in the handset not the display device. When you bring down a web page, you bring it down once. When the CPU feeds the display to show you that same webpage, it has to feed it continuously to keep it lit up, even if the screen isn't changing. Even a small 320 x 240 x 2 color screen which refreshes many times per second requires big bandwidth. BTW, I made an error earlier and used 2 bits per pixel when 2 color should only need 1 bit per pixel so rate is "only" 2 Mbps, still too high. I am not aware of any compression used between CPU and video display devices, but of course it's possible and may contribute to an extension of Bluetooth's range of uses. Of course, now the display device will need it's own decompression chip.

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