DVDs. Interlaced or progressive?

[HeavyHitter]

Originally Posted by WickyWoo

You needed progscan players because the previous ones weren't designed to output progressive scan

In fact there's the infamous Wings of Honneamise disc from Manga that came from a 480i source was zoomed to 16:9 than flagged as progressive so the end product was actually DOUBLE interlaced.

I have friends who have authored DVD for years, even helped some of them get hired into the job. Oh the epic tales of the Mary Kate and Ashley library...did I meantion in 5 different editions each? In different languages, all of which had to be tested over..and over...and over?

But, if the DVD source/disc is progressive 480p......why would you need to deinterlace it (when in fact we know you have to on film for better PQ)? If not, all it would need to do is pass it to the display (as BD does with 1080p/24, for example).

I'd like Kris to chime in on this.