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Re: Blu-Ray
On 31 Jan 2007, at 21:12, Chris Hunter wrote:
> in this month's Which? they mention that the image wasn't so good
> on the
> occasion of the UK launch ... because the discs were formatted at
> 24fps
> (movie standard) but played on a European DVD player working at 25fps
> ... losts of juddering, apparently ...
> goodness ... IFRC ... 24fps has been the standard for movies since I
> don't know when ... how on earth would they be converted to 25fps
> without a lot of interpolation etc - ie: significant loss of
> quality ... ?
> I can't believe it !
In PAL-land, 24fps material is normally just straight converted to
25/50fps (frames/fields) and played back 4% quicker (ie no
interpolation).
In NTSC-land they do a 3:2 pulldown.
http://en.wikipedia.org/wiki/Telecine#3:2_pulldown_.28technically.
2C_2:3_pulldown.29
In the digital world, it's entirely possible to undo all this
nastiness before the images appear on your screen:
http://en.wikipedia.org/wiki/1080p#1080i_film-
based_content_can_become_true_1080p
Jim
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