Form factor is the height of the graphics card; either standard height (fits most computer cases) or low-profile (for slim-line cases).
Memory size is the amount of memory you have available for graphics processing. Memory interface is how fast it can interact with the rest of your system.
D-Sub is a type of connector from your graphics card to you monitor of TV. It's also sometimes called VGA. Other connector types include DVI, HDMI, and S-Video. VIVO means Video-In/Video-Out. Graphic cards with this capability will not only push graphic displays out to your monitor, but will also accept video signals from an external source (such as a DVD player).
The TV-Out port on a graphics card is the S-Video connector. With the inclination towards LCD/Plasma HDTVs (with VGA and HDMI inputs), it's actually outdated technology. Since your TV has available HDMI inputs, you want to be looking for a graphics card with a native HDMI output or a DVI output with a DVI to HDMI converter (most newer graphic cards include this).
HDCP stands for High-Bandwidth Digital Content Protection. It's a protocol used for copy protection. Most (if not all) newer graphic cards with DVI and HDMI connectors are HDCP compliant. So long as your HDTV is also HDCP compliant (and since it has HDMI connectors, I would assume it is), you won't run into any problems.
Now I am a bit concerned about what you're trying to do. Could you please expand a bit on what it is you want to do?
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