18.
You say on page 3 that "The major drawback of any PCI-tuner is a very high workload it puts onto the system CPU and PCI bus..." and "The minimal system requirements for a computer equipped with a TV-tuner include at least a Pentium III 500 processor and at least 128MB of RAM." That's only true for capturing video to disk. I've been using an STB TV-PCI in a 486-class computer with 64MB of memory, using a Cyrix 5x86-120 120MHz CPU, and for viewing TV it works fine. Using a video resolution of 1024x768, tranferring all that video data from the tuner to the video card (Diamond Stealth 3D 2000) ties up the PCI bus fairly solidly, but running TV full-screen and doing nothing else but run the System Monitor, the CPU usage hovers under 10%.
To Comment 6: In the USA at least some cable systems (Comcast here in Northern Virginia) use QAM modulation for digital TV, while USA over-the-air DTV uses 8VSB, so although cable systems use the same cable for analog or digital TV, a DTV tuner card for over-the-air telecasts likely won't receive cable DTV. However, ATI's new HDTV Wonder uses their own NXT2004 decoder chip, which can demodulate both 8VSB and QAM. It remains to be seen when they add a feature to their software to switch to QAM, or when a third party provides the capability, which is in the hardware. Though a combined graphics & TV tuner card such as the ATI All-In-Wonder has the graphics obsolescence problem, using one with their new HDTV Wonder card allows picture-in-picture.
To Comment 17: NTSC stands for National Television Standards Committee and is the USA standard for analog television. ATSC stands for Advanced Television Systems Committee, an international, non-profit organization developing voluntary standards for digital television (see http://www.atsc.org/ for more than you probably wanted to know).
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Posted by: Ferdy

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Date: 04/11/04 02:23:38 AM]