TV to VGA conversion - why so hard/expensive?
Posted on 2006-04-15
What is so special or difficult about converting a TV signal to a VGA signal, that a "TV tuner" box costs between $100 and $300, just to put a TV signal onto a VGA monitor? -- (NO computer running -- dont forget that, please). We are NOT talking here about PC cards, I am only talking about using a SVGA monitor instead of a Televison.
Going the opposite way, you can buy a $5 adapter to convert SVGA to TV signal, which is price realistic.
I would like a BRIEF *technical explanation* as to why it is/is not so hard to convert TV scan lines to work on a VGA. I simply dont believe it costs that much to make a TV-to-VGA converter box, I think it is a total rip off.
I think Mfgs are scamming the public. It should be SO simple to put half the lines on double the Pixel dimensions, and fudge the refresh rate to 2X what TV uses - in fact, electronically, it should be almost trivial. Please give only electronic signal conversion descriptions, and how it could be easily done. Please focus on CONCISE electronic descriptions, not links, not lengthy pasted excerpts, and not other side issues. Thank you.
BRIEF ELECTRONIC EXPLANATIONS ONLY PLEASE. NO LINKS PLEASE.