> I noticed a strange thing while looking at DVD players (I guess Blu-Ray > players now). Most of them say that they will up-convert your old DVDs > to 1020 format. This strikes me as quite odd since my HD TV (as is the > case for all flat panels) has to contain its own scan converter to > display various formats. This would make this a very unnecessary > feature. It would appear even worse if you had a display with less than > 1020 lines. There are a lot of 768 line displays especially in the > sizes less than 40 inches. If it really does this, you would first up > convert to 1020 and then down convert to 768. I doubt that that would > improve the picture quality compared with a single up convert to 768. :-) > > IAC, we should avoid using a scan converter to convert the output to > match the screen -- we should simply be able to match the output format > to the screen being used. We would only need a scan converter when a > video image is going to fill part of the screen. Most chips have this > built in.
I assume you mean 1080 not 1020. I've read that a lot of HDTVs have a poor quality scaler, so SD input looks really bad. If the DVD player has a better scaler than the TV it could be worthwhile. I agree that it would surely be better to scale it once to the actual native resolution of the display than to scale it multiple times. Even so there are scaling artifacts which can be annoying. :-( Can you feed a 768 line picture to these TVs, or do they only accept 480i, 720p and 1080[ip]? For 720p I'd just letterbox it and avoid the scaling artifacts. Having an option to not scale 480 would be nice to have, although it would probably be rarely used. The ethervideo box needs a scaler, since the input could be 1080i and the output could be a 480i TV. Analog TVs don't have a scaler, or any way to input 1080i. Does anyone know what the horizontal resolution limit is for s-video? Some analog TVs have surprisingly high horizontal resolution. _______________________________________________ Open-hardware-ethervideo mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-hardware-ethervideo
