View Single Post
Old 14th July 2010, 13:13   #10  |  Link
Ghitulescu
Registered User
 
Ghitulescu's Avatar
 
Join Date: Mar 2009
Location: Germany
Posts: 5,769
They don't need them. The PC monitors were not designed to be interfaced with video equipment, except for CGA and VGA (with adapter). The VGA can be seen as a step back, since it dropped the digital interface in favour of an analog one, issue "solved" only recently by DVI (and laptops).

Concerning "those" people: they should not use the PC for playing, it was not designed this way (it can be used and it's extremely versatile), but for producing/editing multimedia. There are lots of issues to be taken care of when one decides to interface a PC with an analog monitor (less items when digital):
* electric and logic levels
* scanlines (480 vs. 481-486 for NTSC)
* PAR
* DAR
* overscan
* resolution (or how to fit 640x200 EGA pixels in 711x483 analog samples)
* color resolution (or how to properly subsample the colour info)
* interlacing the progressive content
* frame rate adaptation (or how to fit 72 Hz refresh rate into 59.94i)
* color space conversion (from RGB into Y/C)
and I think I can continue.
Ghitulescu is offline   Reply With Quote