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Forums › Home Theatre (incl HTPC) › 1080i motion blur


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Topic # 67713 7-Sep-2010 15:35
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I havent really worried about this as it has only affected TV3 until now, but with the change of TVNZ channels 1 and 2 to 1080i I need to get it sorted.

Basically I'm looking for advice on  bvest settings to get rid of motion blur - on TV3 at present it is quite bad.

My setup is.

HTPC running MediaPortal with Nvidia 9600GT using PDVD10 codec. Output is to a 720p projector that is actually being fed 1080p from the graphics card as this is what the projector shows as its native res on HTPC.

At present I havent changed any of the defaults as far as deinterlacing. Is there a prefered setting for this?

Would dropping the resolution back to 720p help?

Thanks in advance.




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  Reply # 377571 7-Sep-2010 15:49
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Slightly OT: who says TVNZ is now in 1080i? I hadn't heard about that...

-Matt

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  Reply # 377575 7-Sep-2010 15:56
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mattyboy2: Slightly OT: who says TVNZ is now in 1080i? I hadn't heard about that...

http://www.geekzone.co.nz/forums.asp?forumid=83&topicid=67567

I have seen this on TV3 also, but only on certain content which I can't really explain.
One example is the promo ads for nightline, where the presenters lips are clearly interlaced.
I'm wondering if this is linked to how TV3 are producing this content or it's upscalling etc.
The likes of CSI etc are perfect on my Panasonic TV.

 
 
 
 




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  Reply # 377584 7-Sep-2010 16:25
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The only program I have watched from TV3 is "whats really in our food" and when ever they pan quickly or there is fast movement it blurs.

Havent watched anything else, spose it could just be that program.

I dont watch a lot of NZ TV but I do watch one news everynight so if they are going to 1080i soon I want to be sure its going to be OK.




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  Reply # 377646 7-Sep-2010 19:45
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What output type and refresh rate are you using?



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  Reply # 377665 7-Sep-2010 20:23
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HDMI, the refresh rate changes to whatever the video stream is - so it is 50 I guess, my refresh changes between that and 23.9...blah for downloaded content.

The projector can handle the different rates.

I can have the refresh chane alert onscreen and tell me what its changed to so I'll give it a shot and make sure its working correctly.




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  Reply # 377666 7-Sep-2010 20:25
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there shouldnt be too much motion blur: 1080i is 30 fps which is 25% higher than blurays which give 24 fps only.

it must be the processing (ie deinterlacing) and they way your projector interacts with the signal.

obviously 60fps is better but i can live with 30fps or even 24 fps




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  Reply # 377671 7-Sep-2010 20:55
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Nightline and "whats really in our food" are both SD shows, so I would say it's something to do with the upscaling and the pixels just not being there for the fast movements. Im sure you won't have any issue when watching an HD show.


CSI is in HD which is probably why it looks fine...

Just my 2c worth

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  Reply # 377794 8-Sep-2010 10:41
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Yes definitely my observations are with deinterlacing type effects, possibly from the SD upscaling process.
The fact that true HD shows are fine suggests this specific effect has nothing to do with the 1080i broadcast format.

And yes, Blurays 24 fps is inherently too slow for full screen panning shots especially.

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