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Which Scaler able to convert 1080p24 into 1080p72 ?

 
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fabian



Joined: 09 Jan 2008
Posts: 14
Location: Pforzheim, Germany

Posted: Wed Jan 09, 2008 8:06 pm    Post subject: Which Scaler able to convert 1080p24 into 1080p72 ?
Hello everybody.

I just want to realise a flicker- and motionartifact-free HD-Picture with my CRT.

So my intention is to feed them over HDMI/DVI ( via HDfury) with 1600x1080 progressive at a framerate of 72Hz, to stay within the 165Mhz limit of HDMI.

Does anyone have serious experience doing this?

I think its not a problem using a HTPC, but I want to have a standalone solution and therefore I need to know, if there`s any scaler on the market which is able to convert 1080p/24 into 1600x1080@72Hz, instead of 1920x1080/60?

Could it work with a Lumagen Vision HDQ?

Would be happy to hear from you.

Regards

-Fabian

Last edited by fabian on Wed Jan 09, 2008 8:46 pm; edited 1 time in total
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9kids



Joined: 25 Jun 2007
Posts: 138
Location: Manassas, VA

Posted: Wed Jan 09, 2008 8:31 pm    Post subject:
I can't help you with Scaler information, but I think the resolution you are really after is 1920x1080 and not 1080x1600. 1080p refers to the height of the screen or how many scan lines there are from the top to the bottom. In computer resolution format the first number is how wide the screen is and the second number is how tall the screen is. If you are wondering where the 1920 comes from, most wide screen movies are a 16:9 aspect ratio. So at a hight of 1080 in order to get 16:9 you come up with 1920.
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fabian



Joined: 09 Jan 2008
Posts: 14
Location: Pforzheim, Germany

Posted: Wed Jan 09, 2008 8:54 pm    Post subject:
9kids wrote:
I can't help you with Scaler information, but I think the resolution you are really after is 1920x1080 and not 1080x1600. 1080p refers to the height of the screen or how many scan lines there are from the top to the bottom. In computer resolution format the first number is how wide the screen is and the second number is how tall the screen is. If you are wondering where the 1920 comes from, most wide screen movies are a 16:9 aspect ratio. So at a hight of 1080 in order to get 16:9 you come up with 1920.


No, I really mean 1600 horizontal pixel!

You`re right, I swapped the H and V, it`s now corrected - thank you.

This unusual resolution is based on the problem, that the "Pixelclock" of HDMI is limited to 165Mhz, which means any above 60Hz at 1920x1080p is not possible and therefore you need to limit the resolution to get a higher framerate.
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Person99



Joined: 09 Mar 2006
Posts: 4899
Location: Flower Mound, TX

Posted: Thu Jan 10, 2008 12:50 am    Post subject: Re: Which Scaler able to convert 1080p24 into 1080p72 ?
fabian wrote:

So my intention is to feed them over HDMI/DVI ( via HDfury) with 1600x1080 progressive at a framerate of 72Hz, to stay within the 165Mhz limit of HDMI.


You can actually do more than 1600 and stay under the 165 limit--IIRC you can almost go up to 1800.

fabian wrote:
Does anyone have serious experience doing this?


We have talked about this before, not sure anyone has actually implemented it though.

fabian wrote:
I think its not a problem using a HTPC, but I want to have a standalone solution and therefore I need to know, if there`s any scaler on the market which is able to convert 1080p/24 into 1600x1080@72Hz, instead of 1920x1080/60?

Could it work with a Lumagen Vision HDQ?



As far as I know, it should (I've not done it because I like 1080i/96 and the lumagen does this). To be sure, contact Lumagen support and get to Patrick and ask him.
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Cine 7



Joined: 06 Jan 2008
Posts: 26
Location: Singapore

Posted: Thu Jan 10, 2008 4:06 pm    Post subject:
Quote:
So my intention is to feed them over HDMI/DVI ( via HDfury) with 1600x1080 progressive at a framerate of 72Hz, to stay within the 165Mhz limit of HDMI.


How exactly is the "pixelclock" calculated? For 1080p @60Hz is it simply 60x1080x1920=124,416,000 (124.4MHz)?

I think there is more to it than just that. I am trying to find out what I can feed my BARCO which has a bandwidth of 75MHz?
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