ATI and NVIDIA: Quick Look at HDTV Overscan Compensation
by Andrew Ku on August 25, 2004 12:00 PM EST- Posted in
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Video Cards - HDTV support
At the moment, ATI provides HDTV output support via HDTV blocks and dongle.- VGA to Component HDTV block for the Radeon 8500 and All-in-Wonder 9600 series
- DVI to Component HDTV block for the Radeon 9800, Radeon 9700, Radeon 9600, and Radeon 9500 series as well as the All-in-Wonder 8500/8500DV
- Those who own an AIW 9800 or AIW 9700 don't need a dongle, since a separate YPrPb component video adapter connects to the video out port.
NVIDIA plans to provide HDTV output via DVI out with the upcoming drivers (ForceWare 65.xx). But the issue still is some HDTV sets use component, which is why it would be nice for NVIDIA to produce a dongle or some option for those who need it.
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AndrewKu - Wednesday, August 25, 2004 - link
#2 - True. Hopefully, their will be more convergence in the spec.aw - Wednesday, August 25, 2004 - link
Keep in mind that for HDTV gaming, consoles are actually ahead of computers. A lot of games on the Xbox and a few on PS2 come in 480p/720p/1080i flavors, so they look great on the HDTV without any screwing around. Hopefully, computer game makers will start offering standard HDTV resolutions soon in all games...I have no idea how practical that is but if consoles can do it I assume they can too...Questar - Wednesday, August 25, 2004 - link
"It is implemented deliberately on TV sets because of the different video input formats: composite, s-video, etc., all of which the TV needs for which to provide support. If overscan was not implemented as a factor of these different formats, there would likely be underscanning of different degrees on different TV sets. This is due to the different protocols and inherently different signals that the TV needs to handle."Where do you come up with this crap?
Overscanning is to eliminate the black bars around the picture. This was done long, long before there was s-video, component inputs, etc.
The type of input has nothing to do with overscan.