Production Release 010607 -- Lumagen HDQ w/ 1080p/24 input



Quote:
Originally Posted by imws /forum/post/0


So I installed the latest Lumagen firmware on my HDQ yesterday so that I could try sending 1080p/24 signals from my Sony BDP-S1. I was able to get it to work and it looks much better than sending 1080i/60 to the Lumagen. However I have a small issue. Every few minutes I notice a frame stutter. It just hiccups for a millisecond and then all is well until a few mins later until it does it again. Has anyone else experienced this with 010607 firmware?

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I have the same problem using the 1/6 firmware with the Pioneer HD1 on a HDP. Turning Genlock off and back on during a movie seems to reduce it but not eleminate it entirely. Also had a problem with 480i over HDMI in fast motion scenes; motion blur with what appeared to be momentary horizontal lines most notably in actors faces. Finally set the HD1 to 480p for DVDs. Avia resolution tests show equal PQ (IMO) and I get significant improvement on the moving zone plate torture test.


On the other hand, I have had problems similar to this ever since I started using HDMI/DVI inputs. None of the above occurs for both SD and HD material with component input. I have checked the Lumagen users forum and not found an answer.

dsinger have you tried Production Release 010807 as yet?

No. I am still using the 1/06/07 release.

Do all Blu Ray players do 1080P24?


None of the HD DVDs do..



Quote:
Originally Posted by thebland /forum/post/0


Do all Blu Ray players do 1080P24?


None of the HD DVDs do..

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The Pioneer HD1 also outputs p24. Regarding Gary's comment, when I compare 1080i to 1080p24 on the resolution pattern from a Sony BD disc, I find that the vertical resolution bars have a slight "jitter" using 1080i. With 1080p24, they are rock solid. Looks like a high resolution photograph on my 65" Panny 600U.

I see that jitter as well at 1080i. Using 1080p24 the pattern on the Sony BD disc "The Fifth Element" looks as dsinger has pointed out rock solid.

Liam,


It is my understanding that although that device outputs 1080P it is not created by the decoder in the player. The decoder outputs 1080i to the in built de-interlacing chip that then has to do the i to p conversion (i should really check this is the case but I'm pretty confident it is). I think it also only outputs 1080p60....so you are probably better sending 1080i to the Lumagen and letting it do the i to p and any frame rate conversions you want.


Gordon


Gordon

Can 1080P24 be perfectly dissected to 1080P24sF?


What about 1080P60 to 1080P24sf? Or would 1080i be better than 1080P to 1080P24sF?

1080/24p should be easy to convert to 1080/24PsF with no loss or degradation of any kind. It's sending odd/even lines at 48hz rather than even and odds together at 24hz.


1080/60P you can't get to 1080/24P or 1080/24PsF too easily, unless it's film sourced, in which case I have to ask why you upconverted it to 1080/60p to begin with. With film sourced material the processing to get it from 1080/60i to 1080/24p or 1080/24PsF is better implemented on almost all processors, and more mature. The Lumagen can't extract 1080/24p from 1080/60p at all. Maybe the Radiance will, but even then I'd probably stick to 1080/60i unless I heard different, that process has been around a lot longer.


with true 1080/60P video material you can't get that to 24hz at all without a lot of weird artifacting.

>>> can't extract 1080/f24p from 1080/60p


Most processors that do 3-2 pulldown sensing and optimizing do that in the de-interlacing. Incoming 1080p or 720p skips the de-interlacing stage so this input would need an added stage (neither included nor sold separately for most of today's processors) to do the 3-2 pulldown sensing to pick out matching fields for 1080psf24.


Creating 1080/24p, simple frame rate scaling of incoming /60p film source will result in drifting between a highly undesirable "2-0 pulldown" (taking only first and third from threesomes) and the "correct 1-1 pulldown" and either could persist until the next bad edit comes along.

I want a processor solely to generate a 48Hz output from HD DVD and Blu Ray sources. My reading of this thread implies that I should go for a VP50 over a Lumagen, is that fair.

No thatwould not be fair. Lumagens can do what you want. I would suggest you need to view the two yourself to see which you prefer.


Gordon

All - I am VERY confused. I am just putting in new theater room with Sim2 single chip HD. I need a 'processor/switcher' to accept new HD sources, standard DVD, old LaserDisc, etc. There are so many out there -- Lumagen, Algo???, Calibre. It is very hard to get a handle on the ones that work best and most signifcantly with my room (dedicated - no light) and projector. Complicating this is the video showrooms demo'ing this equip. ALL feature different projectors, difrerent screens, etc. It's virtually impossible to compare apples to apples. This is my first dedicated room. I have what I consider to be very high end equip. (Theta, Threshold, etc.) and expectations. Which TWO would you recommend I consider?