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720p/1080p content looks 'Grainy' -is this HD?!

post #1 of 16
Thread Starter 
My new 20" Samsung 206bw arrived today. (1680x1050)

I just loaded up Matrix Revolutions 720p .mkv video file-

File Details:
SiZE..........: 7.9 GB
ViDEO.CODEC...: x264
FRAMERATE.....: 23.976
BiTRATE.......: 6860 kbps
RESOLUTiON....: 1280x532 (OAR)
AUDiO1........: English DTS 5.1 1536 kbps


And the video looks kinda grainy. Sorry for my lack of explanation, but the video looks like the pixels are visibly moving... like vibrating with different colours, only slightly but still visibly. This is in areas where the camera is unfocused, of course. But also in other areas where the camera is in focus. I have to look 'kinda' closely, but its still obvious. It's like I can see all the pixels.

I also tried watching the 1080p version and its also a tiny bit grainy as I previously explained.

I sit about 1 metre away from the screen, its on my desk. I moved back more, but the grain is still noticeable. I watched some trailers from Apple HD, but they are fast action scenes so its not possible to view the graininess.
Not to mention standard def. content looks like utter crap now, but that must be how it is when stretched out on this monitor.

BTW, I cannot use DVI input. When I do it says "Check input cable" or similar message on the screen. So I switched to RGB (VGA connection) using a DVI converter adaptor on the end. I doubt this is the cause of the problem, but I should still mention it.

I'm using Medial Player Classic (MPC) to view the material in question.

Is it normal for the picture to look a little grainy as I explained? Possible solution? Thanks for reading.
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post #2 of 16
1) MKV is not accurate represention of Hi-Definition Content. MKV is HIGHLY compressed and inadequate for even Broadcast HD. A feature length HD-DVD or Blu Ray H.264 Compressed movie spans at least 20gb. If you want to really see REAL Hi Def, Purchase a blu Ray player and watch Pirates of the Carribean 1 and 2. You don't see grain in Apple HD trailers because they're H.264. Better than MKV files will ever hope to be.

2) Your Computer Monitor is not optimized for HD decoding. It's sub-par for such a thing, and you shouldn't judge content based on that.

3) Film is grainy. Especially when transcoded to a digital intermediate for editing. You'll notice more grain than you would at any other time.

No solution but to get real hi definition content or a better monitor. My Gateways decode straight-in HDMI and YbPbR on par with the best LCD televisions.
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post #3 of 16
Thread Starter 
I see, thanks. I actually moved further back and the content looks better. I was sitting rather close.
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post #4 of 16
Only new released movies will show HD nicely.

Someone will probably try to correct be but I own a HD-DVD and Blu-ray player and a 1080p TV, and this is true...

All movies that have been "ported" to HD have SERIOUS noise issues. Its nearly unbearable.

However the new movies do not, and look awesome.
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post #5 of 16
There's probably still a lot of digital noise. Most of those movies have gone through extra digital processing which will bring out the noise more-so than anything else.

Newer movies should look better, however, noise will be an issue. It gets better when you go to Broadcast and 2x+ better when you go to Blu Ray or HD-DVDs.
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post #6 of 16
Not entirely sure that this discussion is legal TBH.

If you think about it for a minute, A Blueray disc is 50GB and a HD-DVD disc is 30GB of data. The .MKV and .AVI formats of these discs tend to be less than 10GB therefore the amount of compression required to attain this file size must be sizable.

With this in mind, no copy will ever be as good as the original disc.
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post #7 of 16
Would he benefit from DVI input if he were able to get it to work?
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post #8 of 16
Quote:
Originally Posted by rottenotto View Post
Would he benefit from DVI input if he were able to get it to work?
I have found that when I use the D-Sub output (VGA - Analogue) it produces a less sharp and less vibrant image than using the DVI-D outputs which feed a true digital feed.

The more conversion steps by passing through DAC's (digital to analogue converter) the greater reduction in quality.
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post #9 of 16
Thread Starter 
I see all of your points. Thanks.

I'll investigate why DVI doesn't seem to work straight outta the box. I'll throw on a BluRay movie and see if that changes things too.

Don't get me wrong, the picture looks amazing, it's just when I sit 1 meter away from the screen I notice some noise in that movie.
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post #10 of 16
how are you currently connecting your system up?

Your card has only DVI outputs (i presume, if its like all other 7900GS cards) are you using a dongle (adapter) to connect the vga cable to your card?

also might sound like a simple question but have you tried BOTH DVI connections on the card?

Speaking from my own experiences, My card only output DVI from one output unless you change a driver setting. also if the display is not connected to the graphics card prior to powering up the PC i get no signal if I do it after the POST (power on self test).
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