NVIDIA Enables PureVideo on GeForce 6 GPUs
by Anand Lal Shimpi on December 20, 2004 1:22 PM EST- Posted in
- GPUs
DVD Playback Quality
Now that we've laid the background information, it's time to look at DVD playback quality. Although NVIDIA provided us with around 700MB of test data, we took it upon ourselves to put together our own test suite for image quality comparisons. We used some tests that have been used in the home theater community as de-interlacing benchmarks, as well as others that we found to be particularly good measures of image quality.
For all of our quality tests we used Zoom Player Pro, quite possibly one of the most feature filled media players available.
Our first set of tests are Secrets of Home Theater and High Fidelity tests. The Galaxy Quest theatrical trailer isn't flagged at all and relies entirely on the DVD decoder's algorithms for proper de-interlacing. The default image below is ATI's X700 Pro, mouse over it to see NVIDIA's PureVideo enabled 6600GT:
Hold mouse over image to see NVIDIA's Image Quality
NVIDIA offers a huge advantage here, the interlacing artifacts that are present in the ATI image are no where to be found in the NVIDIA image.
Next up we have The Making of Apollo 13 documentary off of the Apollo 13 DVD. Often times bonus materials on DVDs aren't properly encoded and trip up DVD decoders, let's see how ATI and NVIDIA fair here. The default image below is ATI, mouse over the image to see NVIDIA.
Hold mouse over image to see NVIDIA's Image Quality
NVIDIA once again takes the lead here; notice the combing artifacts on the man's suit coat, they are not present with NVIDIA's solution.
Our final test here is from the Making of the Big Lebowski off of the Big Lebowski DVD. The scene here is "The Jesus" licking a bowling ball, first let's have a look at what the scene is supposed to look at just before it transitions to another frame:
Hold mouse over image to see NVIDIA's Image Quality
Neither ATI or NVIDIA pass the Big Lebowski test, what went wrong here? The correct image above was generated by using a software decoder (DScaler 5) and forcing "bob" de-interlacing, which uses none of the data from the next field in constructing the current frame. The reason this works is because this particular scene causes most DVD decoders to incorrectly weave two fields together from vastly different scenes, resulting in the artifacts seen above. It's quite disappointing that neither ATI nor NVIDIA are able to pass this test as it is one of the most visible artifacts of poor de-interlacing quality.
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phusg - Tuesday, March 1, 2005 - link
Has anyone found a 6600GT card manufacturer that bundles nvDVD including the DVD decoder yet?akozak - Tuesday, January 4, 2005 - link
Hey Anand,Don't mean to poo-poo on your hardwork - but almost all of your images are using different frames.
a) Galaxy Quest - differences in star placements, planet alignment
b) Apollo 13 - head is shifted b/w images
c) Friends - characters shift - legs are different locations etc
In fact the only ones that look like they are the same frame show no differences.
Have you looked at the difference in frames? If you took one frame before or one frame after on one card, would it match up to the other card's image you already have?
b3roldan - Friday, December 31, 2004 - link
hi, I'm using a vanilla 6800 from inno3d w/ Forceware 66.93.I was just wonderin if you guys were also experiencing problems I've had with these games or if t'was just me.
Metal Gear Solid 2: Substance
- Everything's black and white. Wondering if it has anything to do with nvidia's 0x32 Z stencil (shadowing technology).
MAFIA
- Walls are multi-colored, sometimes transparent
I've just upgraded from a 9800PRO 128mb, which worked pretty well with these games.
Just wonderin if there are others with the same prob... thx :)
Gatak - Thursday, December 23, 2004 - link
What nvidia or ATi ought to do is to prove a simplier interface and especially much better documentation on how to access the hardware directly.The GPU's are incredibly fast for lots of things. For example it would indeed be possible to do video encoding, photo manipulation effects (Apple core.image/video!) or even sound compression.
jago25 - Thursday, December 23, 2004 - link
Shame I'll never be able to use it..seeing as I don't use Windows.You can use a GPU to do anything. Might be a good idea to make it easier to do so rather than having to develop more codecs as that's a never ending job.
hellokeith - Wednesday, December 22, 2004 - link
The article really needs to be corrected per the 6800 PCI Express vs 6800 AGP. People are talking about this on numerous HTPC/AVS forums and being mislead. Only the PCI Express 6800 has the new silicon.karlreading - Wednesday, December 22, 2004 - link
ive jumped through the other pages from a comment on page one, so if this has already been answered, lynch me now:anand said he knows of no manufacturer that bundles nv DVD.
im pretty sure its on my bfg disc that came with me 6800GT OC ;)
thats me sorted then.
karlos
mikepers - Wednesday, December 22, 2004 - link
This should help:http://www.nzone.com/object/nzone_purevideo_requir...
There's a link for the correct driver and the decoder and at the bottom a link which shows which cards support what. Sort of sucks that my AGP 6800 Ultra has less features then a 6600 card but it is what it is...
CrystalBay - Tuesday, December 21, 2004 - link
Remember Buy.com ? Where are you Harvey!!!!tfranzese - Tuesday, December 21, 2004 - link
mcveigh, he provided the link to where you could find that for the ATi side of things. I'm curious about the S3 things, though it wouldn't surprise me if true.