g-force said:
They de-interlaced before mastering the DVD. And they did a terrible job at that, as witnessed by the poor vertical resolution and jaggies compared to the laserdiscs.
They did not deinterlace (otherwise the framerate would be 29.97fps). Instead, they carried out IVTC, which is of course the correct way to do it.
Mielr said:
I noticed just as much aliasing (jaggies) on the LDs as I did on the DVDs.
However, the fuzzier nature of the LDs (depending on the player) covers a multitude of sins. For that reason the aliasing on the LDs may be less noticeable to some.
It is true that there is a degree of aliasing present on the NTSC laserdiscs. Laserman once said he thought they were caused by a minor field misalignment in the telecine. The PAL laserdiscs which come from a different transfer are better in this respect, and don't show so much aliasing.
I'm not a professional, but it looks to me as if whoever mastered the DVDs applied a vertical blur in an attempt to mask the aliasing. Unfortunately, this not only resulted in a loss of vertical detail, but has actually made the aliasing worse in some locations.
To add insult to injury, the Region 2/4 PAL DVDs were upscaled from the NTSC master, intead of using the PAL master that the French/German laserdiscs were made from.