Posted by Jay G. on 12/23/05 04:14

On Fri, 23 Dec 2005 13:49:03 +1300, The Other Guy wrote:

> Joshua Zyber wrote:
>>
>> Well, again, all R1 DVDs are NTSC. All of them.
>
> DVD supports three frame rates, including 24fps, with 3:2 pulldown done
> by the player to give 29.97fps required for NTSC.
>
> As film only runs at 24fps, storing on DVD at 24fps and having the
> conversion done by the player means space is not wated on the interlaced
> frames as these can be constructed during playback. Less bandwidth is
> used to achieve the same image output. It also means they could be
> output by players at 24fps if the gear supports it. This is where my
> confusion with progressive scan came in, since 24fps displayed
> progessively is where the best image quality would be achieved.
> Progressively displaying NTSC achieves very little, since the interlaced
> frames are part of the recording.

I wouldn't say it achieves "very little," it depends on the de-interlacer:

http://www.hometheaterhifi.com/volume_7_4/dvd-benchmark-part-5-progressive-10-2000.html

-Jay

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