Advantage of 1080p vs 1080i for 24fps movies

[pthierry]

Hello everybody,

I see a lot of discussion about the advantage (or lack of) of 1080p versus 1080i, especially for moving pictures.

I was wondering, knowing that probably a lot of the original content for Blu-Ray discs will be movies shot at 24 fps (and played at 25fps), what would be the added value of a transfer into the 1080/50p format instead of 1080/50i ? The two half-frames in the interlaced mode would have anyway the same temporal content, defeating the argument in favor of 1080p, isn't it ?

Also, in case of 1080/50p, how can 50 full frames be generated from a movie containing 25 frames per seconds ? Either a frame out of two has the same content as the previous one, or the content of those additional frames is "invented" by some interpolation, but anyway does not correspond to anything present in the original material.

So, does 1080/50p make any sense for most movies ?

Thanks to give your opinion about this topic...