CurtPalme.com Home Theater Forum

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

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Tjeerd, i can email you those patterns if you like.

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

**AnalogRocks** · Posted: Sat Sep 13, 2014 12:28 pm Post subject:

"Look into the hypnotic eye" Laughing

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6319 Location: Australia

Next time i get on my computer i will zip them up and post them over Wink

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

Two more pics but with peaking off. 720p@72. The diagonal waves come from the iphone there is some interference at 72Hz with the iphone that scrolls over the screen.

I have no problem removing all my stuff to another thread!

Also had some problems with the moome. It seems I have to adjust the phase with the button if I make a nonstandard resolution. I could not get 800p the whole image was cut in two parts and darkened. I suspect it is shifted. Going back to standard everything was allright. But there is some trembling visible in these pictures as 720p@72 is at some edge where I tweaked it.

stridsvognen · Guest

Looks nicer, now there is just a hint of peaking on the red, and it dont seems like the extra peaking helps much anyway, other than just distort the image.

Now where did that new shaking noise come from.?

What pixel clock are you running here.? 90Mhz.?

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

I was thinking it should be possible to get a 800p@42 because it is almost the same bandwidth as 720p@72. I read that using very small porches the flickering should be not visible?

Also I have to check why red is better. Changing the neckboards etc. It is possible!

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

stridsvognen · Guest

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

stridsvognen · Guest

gasser · Joined: 31 May 2012 Posts: 40

Francisco:

Zien we een aantal goede screenshots? Het eindspel is als je geniet van de films.

Bedankt,
Wes

stridsvognen · Guest

Just shot 4 pics ilustrating the 1:1 with different contrast settings, you can see the vertical role off a bit at low level. 1080P 72hz 178Mhz

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

Ok now we know what to look for.

I tried 1920x800@48 and that looked very sharp on the Barco. I did not see flicker when in front of it but when looking through the corner of my eyes I did see it. Don't know if it bother me as the sharpness is great and the one on one is comparable with 720p@72. Movement is very smooth far the best I have seen so far. Only problem is that the Moome does not always send the right vertical sync signal on non standard resolutions and there is no way to fix it. What seems to work is starting in standard and switching later.

stridsvognen · Guest

Francisco · Joined: 05 Apr 2007 Posts: 305 Location: The Netherlands

Last week I received the custom input port3 board from Moome to test. With stock Barco boards it preforms well, but the video chain is holding back the capabilities of the moome board. In combination with Eisemann modified boards it preforms much better and so far the best combination I've tried. One thing is clear as by side by side tests that the BW of the video chain is far higher with Eisemann boards, only his HDfury HDMI solution held it's BW capabilities back.

The pictures I took are from my test chassis which is not as sharp as my main unit. So don't look at my sharpness, it's not fine tuned on this projector.

I know that Greg Eisemann is working on new modifications and HDMI chip but I don't know if he will continue with it as the market for Barco mods is decreasing rapidly.

without peaking

You'll have to wait for movie screenshots until I have solved my Gamma and light output problem on my viewing unit.

stridsvognen · Guest

Fransisco what pixel clock are you running at that shot.?

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

Think that hdfury has a limited video dac like the external Moome. Might still be a great scaler. Does the hdfury have this one chip video dac? On the better boards there are three. I tried direct out from the external moome bypassing the buffer with the gamma but it got no better at 1080p. The specs say it has -3db at 90MHz, the bandwidth picture in the datasheet says enough.

But very nice one on one I see. I have an idea what that looks like combining it with the low noise internal solution.

stridsvognen · Guest

redfox001 · Joined: 16 Mar 2009 Posts: 2251 Location: The Netherlands

One confusion again. I say dac bandwidth 90 MHz that means pixel clock 180 MHz.

I just see in de datasheet of a dac that is likely the Moome ext that it is not flat till 1080p. My guess is they are allowed to call it 1080p if it has -3db at the required bandwidth.

I compare buffered an unbuffered of the moome ext v3 and see no difference at 1080p so unless the hf is the problem it more likely is that the high frequency buffer does not change the bandwidth. Not 100% certain yet untill I have a reference display or scope. I would expect the change because I have seen how a vga adapter does change the bandwidth on my barco. So together I think it is likely this Moome v3 ext is not so good but i could have the wrong datasheet and it could be that the hf noise is spoiling the outcome. Also if the display is perfect than of cause the Moome will only do a little to make it worse. I woudl say it would do a 0,5 db down on 1080p. Normally that would be a good number but for what we try to achieve a 0,1 db down is the max acceptable for the input. We can focus elsewhere but that 0,5 db is for ever lost.

You are right they all do a 720/800p 0,1db down. I think that because the vga and the moome look the same at these resolutions. It is at 1080p I see a sharp distinction. So I think the Moome has a steep slope around that frequency as the datasheet sugests too.