[mythtv-users] What is temporal spatial deinterlacing, and how do I get it?

Paul Gardiner lists at glidos.net
Thu Feb 26 12:23:40 UTC 2009


Doug Larrick wrote:
> On Thu, 26 Feb 2009 11:25:16 +0000
> Paul Gardiner <lists at glidos.net> wrote:
> 
>> John P Poet wrote:
>>> Actually, Myth's BOB was awesome with my old interlaced TV.  Combine
>>> it with a 540p60 modeline, and the net result was the TV thinking it
>>> was being fed 1080i.  Result was the TV doing the deinterlacing --
>>> which at the time it could do much better than any method Myth had.
>>>
>>> This got around the problem with nVidia's drivers not being to
>>> produce a correct interlaced output.
>> That's a lovely trick. What I don't understand is how the TV locks up
>> on the correct field mod 2. You are sticking out Odd;Even;Odd;Even...
>> with the timing info of each being identical. How does the TV know
>> which to lock up on. If it gets out of sync, the fields will be
>> spatially reversed, which should look pretty bad (at least on a
>> true 1080 set).
> 
> I wrote the original bob code in MythTV.  At least on my CRT HDTV,
> I suspect it is actually displaying at the requested 540p60, not
> actually deinterlacing anything.

Could be, but then it shouldn't look much better than SD... well
I suppose you still have the horizontal resolution. That being
the case, I'd have thought people wouldn't be so pleased with
the result.

P.



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