Topic: Checkerboard output for 120Hz on DLP TV's.

I am wondering if it would be possible with this software to smooth out to 120Hz, and then interleave the video down to a 60Hz 1-pixel checkerboard pattern.  This way, it could be played to a wobulated DLP chip, and get perfectly smooth 120Hz framerates.

  • MAG79
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Re: Checkerboard output for 120Hz on DLP TV's.

CraziFuzzy
if it would be possible with this software to smooth out to 120Hz
Yes. It is possible.

and then interleave the video down to a 60Hz 1-pixel checkerboard pattern
What software (or hardware) can do it? Renderer or Player? What do you using for play 120 Hz?

And what DLP TV has so strange 120 Hz input? hmm

Re: Checkerboard output for 120Hz on DLP TV's.

Just about all 1080 DLP TV's made between 2007 and 2011 don't have a full 1920x1080 pixels on the DLP chip.  Instead, they use a 960x1080 checkerboard pattern, and a 120Hz 'wobulation' mirror to shift the checkerboard 1 pixel back and forth.  What this means is that, while they end up displaying the full 1920x1080 pixels 60 times a second, they actually display half the pixels 120 times a second (think old interlaced television, but interlaced every other pixel).  It's only really 'used' on them for 3D, where the source still just outputs a full 1920x1080 image, but each part of the checkerboard is for each eye, and the glasses are synced to the wobulation mirror.

My thoughts were that this could be used to get smoothmotion up to 120Hz.

Additionally, it would be REALLY awesome if this format could also be added to the types of 3D output you are using.  Here's a quick writeup on it: http://www.dlp.com/downloads/DLP%203D%2 … 514b331dd0

These were basically the first mass available 3D TV's for the home, and I'm sure there are still a lot of them out there.  I actually still feel the picture is better on my 2008 model than on most the TV's in the stores today, and I've been using it for 3D since the day i got it (primarily gaming back then, movies now).

  • MAG79
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Re: Checkerboard output for 120Hz on DLP TV's.

CraziFuzzy
Try this:
1. Open in notepad file Program Files\SVP\AVS\MSmoothFps.avs:
2. Add line to the bottom:

StackHorizontal(SelectEven(),SelectOdd())

3. Save and exit.
4. Use 120 fps as target framerate (Screen selection - Force - point custom refresh rate 120 Hz)
5. Enable stereo mode in your DLP TV but without glasses. Select in TV side-by-side input type.

Your TV will pocess both left and right pictures to compose them into one diagonal filtered "1 px checkerboard pattern" picture to show at true 120 Hz.

Re: Checkerboard output for 120Hz on DLP TV's.

That would work if the set supported side by side mode, But that is not the case with these older sets.  They do no compositing of other modes, supporting only direct display of the checkerboard.

Re: Checkerboard output for 120Hz on DLP TV's.

I think I will need to learn how to make avisynth plugins, and make one that does this, and send it the odd and even, but was hoping this could work into the 3D modes as well.