Progressive scan conversion only once...right?

[Terry1212]

I read somewhere that if both the source (the DVD player) and the output (e.g. projector, plasma screen etc) do a progressive conversion the image is degraded because the image data gets rounded up twice. I have just purchased a 27" LCD HDTV which has a Feroudja chip on board. So do I disable the progressive scan output from my DVD player? I have tried this and it does seem to give a sharper image and there are absolutely no trace of jaggies. With progressive scan enabled on the DVD player while the overall image quality is high, small details seem slightly softened. I have not seen this topic discussed and wondered if my technical assumptions are correct or if any one has a different take. In any case I will leave the progressive option disabled on the DVD player.

Thanks.

-Terry

[Capmaster]

No cross-posting.
https://www.videohelp.com/forum/viewtopic.php?t=238084