[mythtv-users] Any hope for 1080i content at 1080i with nVidia?

Steve Smith st3v3.sm1th at gmail.com
Tue Jul 31 19:05:01 UTC 2007


On 31/07/07, John Veness <John.Veness.myth at pelago.org.uk> wrote:
>
> Steve Smith wrote:
> >   (2) If however you are doing some scaling then what you are outputing
> > isn't line for line the same as the signal so some form of
> > de-interlacing is needed. When does this happen?
> >       One case is when you output a 16:9 format mpeg on a 4:3 TV. The
> > mpeg has 576 (for PAL) lines, but to get the right aspect ratio,
> >       this is scaled to 0.75*576=432 lines. Now our fields don't match
> > up so we need to modify the picture with some form of deinterlacing.
>
> Just out of interest, my old 4:3 Panasonic TV (now since died) had a
> mode where it would squash a picture vertically so that you were still
> getting 576 lines in a smaller physical space. If MythTV could output
> suitable video for that situation, it could theoretically not need to
> deinterlace. (I realise this doesn't apply to all 4:3 users).
>
> John
>
> --
> John Veness, MythTV user
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John,

Same here, my Sony has the same type of mode. Yes if you use this type of TV
functionality your
TV is effectively a real widescreen and you shouldn't need to deinterlace.

Cheers

Steve
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