CurtPalme.com Home Theater Forum

noos@xp37+ · Joined: 17 Jun 2008 Posts: 464 Location: Berlin/Munich

So far, my unqualified opinion is no. I tested several video processors that allow the input of 3d refresh rates. I also tested this with 3d generated content at 50hz/60hz (25/60 per eye) on vps that only allow standard refresh rates.
The problem with 3d when run on a video processor is that the left eye and right eye information is switched every few seconds.The reason might be that some vps do not process all frames, but I guess there is most of the time a different reason. As the refresh rate probably differs on certain machines on three digits behind the comma (96,02hz). The vps will have the same refreshrate before the comma (96,04) - but probably a different rate behind the comma. So I guess a vp that can handle 3d, must have a refresh lock function? Are any edge blenders, geometry- and pip videoprocessors known to have this?

mc86 · Posted: Tue Aug 07, 2012 10:28 pm Post subject:

Wait -- you are talking about 3D on a 1-input and L+R screen output hardware soft edge blender, right? And if I understand, you are also saying that maybe the slight differences in the refresh rate for the left and right screens is different.

This means, periodically and repeatably, that one of the two screens goes black for a frame for a given eye and then the other screen goes black for the other eye... Do I understand this?

If so, you want the outputs to be synched to one-another with much greater precision (tho' not necessarily accuracy wrt the target Hz).

I may yet get around to making more progress on my wacko hybrid blend...should I ever consider/be able to do 3D, I should understand this. Huh -- has anyone succeed with a 3D edge blend?

Matt

noos@xp37+ · Joined: 17 Jun 2008 Posts: 464 Location: Berlin/Munich

mc86 · Posted: Fri Aug 10, 2012 6:49 am Post subject:

Interesting.

Sorry I am completely clueless on 3D stuff. How do the glasses synch to the projector? I'm guessing a box watches for the VBI and triggers the glasses? If so, even if they are some amount off of exactly 96Hz, it wouldn't matter...unless they only do this at some time = 0 to start...then, as time progressive, if the rates vary ever-so-slightly in time....your problem occurs. Does the box look at the HDMI 1.4 3D signal before the CRT gets it and coverts to analog? Just trying to understand a little more.

Matt

noos@xp37+ · Joined: 17 Jun 2008 Posts: 464 Location: Berlin/Munich

Hello,

there a several boxes out that genarate a 3d glasses sync signal from a DVI or a HDMI signal. Some boxes, like the Moome ext 3d also convert to analog.
I have no 100 percent idea what happens in videoprcessors with the 3d refreshrate - but all I have tested change the order of the 3d frames every few seconds.

regards

Marc

Boilermaker · Joined: 21 May 2006 Posts: 527

Don't know about other issues, but both projectors in a blend are synced together so

Boilermaker · Joined: 21 May 2006 Posts: 527

Don't know about other issues, but both projectors in a blend are synced together so they scan together. Maybe someday I'll try 3D but I'll probably have to start with a new BD player as mine won't do it.

Bob