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Discussion Starter · #1 ·
After doing some extensive testing with the Vigatec Dune F, I've decided that native 1080i looks awful. Okay, so that's a simplistic and dramatic statement, because in all actuality 1080i looks very nice --compared to 480i (DVD).


My experience... On a Friday I did some testing, and was thoroughly impressed. 1080i from an HD100 scaled to 768P and displayed on a Madrigal MP9 onto a Stewart StudioTek 130. There are still noticeable artifacts after the scaling, but rather than whole interlaced line artifacts, there was a more subtle and more acceptable pixel shimmer in the problem areas. The biggest difference was the overall appearance of the image. It was much more film-like, and realistic. Colors appeared to be much more saturated and the picture was simply easier to watch and much more natural. The image also appeared to be brighter as well, which makes sense since there is more phosphor being lit with the higher resolution.


For a 2nd opinion, another resident videophile came back from a trip to Runco on Monday, so he was extremely tuned in to quality... I first showed him the scaled 1080i image (duh), and he was impressed, but started pointing out issues I mentioned above. I could tell that he wasn't as impressed as I expected he would be so I put the projector back to the native 1080i. 'Whoah...' was the sound. He decisively agreed that 1080i native is not pleasing to watch in comparison to the scaled version.


My final though: I would absolutely put a Dune F in my theater, simply for the HD scaling. Unfortunately, this tax refund won't allow it this year.


BTW - I won't take the time to go into the SD scaling of this device... for a later thread.
 

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Hi,


please explain why 1080i looks bad on a CRT. Aren´t most of the D-Theater movies 1080i? I was about to buy a D-Theater deck to be able to enjoy HDTV in Europe, and I wasn´t aware that I still might need a scaler to have the best possible picture (I use a Vigatec VC1280 for DVD, but that one can´t scale HD).


Yours,


Philip
 

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@EC51:


Why not ? The DUNE-Fi can't scale it, the DUNE-F does it.
 

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From reading number of thread in thif forum, Dune-F doesn't seem to deinterlace 1080i. Is this not ?

As far as I know Dune-F uses FLI2200 for deinterlacing, and this chip alone does not have horsepower to deinterlace 1080i. If you're talking about bobbing 1080i to 540p then scale, you maybe right. But my definition of scaling is first deinterlace the signal in a proper manner then scale. So 1080i signal has to be deinterlaced to 1080p, and then scaled.

Please correct me if I'm wrong.
 

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Discussion Starter · #7 ·
While the HD scaling technical questions are still up for question with Vigatec, the initial response was that the Dune F still uses the Faroudja DCDi for the HD material as well. The rep with which I communicate is checking with engineers to get up to speed on all of these details since this product is so very new... so there's no definitive answer on that front.


But...


I can say that the 1080i is output at nearly any of the possible resolution outputs of which the Dune F is capable. The output is also most certainly a progressive signal. I'm still learning, so if anyone has concrete info that opposes this info, please speak up!

http://www.vigatec.de/frameenglish.htm
 

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Discussion Starter · #8 ·
Oh, Phillip HS... 1080i is the most frustrating technical spec being sold to the public that I have experienced in a looong time.


It is literally being market as a "1080i is a bigger number than 720p, so 1080i is better". In laymans terms, 1080i is 540p. A far cry from 720p.


On a good EM focus CRT, 1080i shows massive line structure... on the CRT which we use for our reference, 1080i is 1 line of picture, 1 line of black, 1 line of picture... you get the idea. The end result is a very loose, and unnatural image. For many people this 1080i picture still has all of the interlacing artifacts that a 480i signal has on a big screen. Very ugly in fast pans, or quick moving objects.


The difference scaling 1080i to 768p is a huge relief in our testing environment.


Don't get me wrong, I will take 1080i over a 480i DVD any day... but I would certainly take a native 720p over native 1080i in a heartbeat :)
 
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