[mythtv-users] deinterlacing

[Kevin Bailey]

On Fri, Mar 07, 2008 at 02:56:10PM -0800, David Brodbeck wrote:
> 
>    Rule of thumb: If it's an ordinary, standard-definition TV, it's
>    interlaced.  Otherwise, it's almost certainly progressive.  There are
>    exceptions but if you have a piece of equipment that doesn't fit this
>    rule, you probably already know it. :)

Here's something I never really understood: I'm running
myth into a TV over S-video, and some channels had a
"comb" effect on moving objects until I turned on
de-interlacing. If a TV is interlaced, I'm confused
why this setting was necessary. I have the suspicion
that something else is going on, as though in
translating from 1080i or whatever to 480i, something
gets changed. Or is there an obvious explanation for
this ?