ATI's Avivo vs. NVIDIA's PureVideo: De-Interlacing Quality Compared
by Anand Lal Shimpi on October 5, 2005 9:00 AM EST- Posted in
- GPUs
De-Interlacing Quality: Jaggies Pattern 1
The next test takes a another stab at de-interlacing capabilities of the cards:
The next test takes a another stab at de-interlacing capabilities of the cards:
"Interlaced video creates images with scan line artifacts. When video is de-interlaced for display, some of these artifacts may not be completely eliminated. As a result, diagonal lines may appear to have stepped edges. We call these artifacts 'jaggies' as they resemble a jagged edge.Both ATI and NVIDIA perform equivalently here, with the first hints of jaggies appearing as the bar enters the yellow area.
Both 480i standard definition and 1080i high definition video program formats are interlaced and thus produce images with these artifacts. (480p and 720p program formats do not.) They can be corrected with a good quality video processor. A technique called motion adaptive de-interlacing with directional interpolation is often employed to process these types of signals."
Hold mouse over image to see NVIDIA's Image Quality.
Hold mouse over image to see NVIDIA's Image Quality.
Hold mouse over image to see NVIDIA's Image Quality.
Hold mouse over image to see NVIDIA's Image Quality.
| Scoring | Description |
| 5 | JAGGIES ARE NOT SEEN UNTIL THE BAR ENTERS THE GREEN AREA (< 10 DEGREES) AND THE LOGO IS FREE OF JAGGIES. |
| 3 | JAGGIES ARE NOT SEEN UNTIL THE BAR ENTERS THE YELLOW AREA (< 20 DEGREES) AND THE LOGO IS FREE OF JAGGIES. |
| 0 | JAGGIES ARE VISIBLE AS THE BAR ENTERS THE RED AREA (< 45 DEGREES) OR THE LOGO HAS JAGGIES. |
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intellon - Thursday, October 6, 2005 - link
One thing about the guitar strings... Are you sure that they are artifacts and not the texture of the guitar strings? I do agree with one thing, they kinda look extreme...TheSnowman - Friday, October 7, 2005 - link
It is an acoustic base guitar and those do tend to use some pretty massive copper wound strings, but yeah I don't see anything that looks like interlacing artifacts in those shots.Regardless, thanks for the update Anand and I'll check back to see how things turn out. The next card I buy will most likely be for my media center so de-interlacing quality is on my priority list.
TheSnowman - Wednesday, October 5, 2005 - link
I don't follow, the text at the bottom which the test askes to be compared defiantly doesn't show any interlacing artifacts in the posted pics while compression artifacts are mostly in the top right of the image and on the hands. The text does look a bit sharper on Nvidia, but best I can tell that is just from appling a sharpening fliter as that seems to be pretty obviously the case in the last shot with the fingers on piano keys and the slight shifts in geometry than can be seen there.Also, since the compression artifacts only appear in the first ATI shot, I can't help but wonder if that came about from downsampling as the jpg to under 40mb which nearly a quarter of what a full quality jpg of that resolution would be. Regardless, I am curious to see any further explnation of de-interlacing issues with the new r5xx chips as I would hate to try and upgrade my media center card only to wind up with worse de-interlacing than on my current r420 based card.
Anand Lal Shimpi - Wednesday, October 5, 2005 - link
The text itself is fine, it is the background image where the interlacing artifacts are seen. I'll see if I can get a better screen grab tonight.Take care,
Anand
Anand Lal Shimpi - Thursday, October 6, 2005 - link
Apparently ATI isn't seeing what I'm seeing, so the issues may have been a driver problem, I will update you guys as soon as I have a driver/fix for the situation.Take care,
Anand
vailr - Wednesday, October 5, 2005 - link
Newer driver version?Ati Catalyst 8.18 beta:
http://www.station-drivers.com/forum/viewtopic.php...">http://www.station-drivers.com/forum/viewtopic.php...
Live - Wednesday, October 5, 2005 - link
I would if I could. Quit teasing us and give as the real deal, lol.
cirrhosis - Wednesday, October 5, 2005 - link
INQ has benchies already. Not a surprise. Cards are matched.Hacp - Wednesday, October 5, 2005 - link
GRAKK!cirrhosis - Wednesday, October 5, 2005 - link
Interesting. Here's hoping that ATI improves on what they've started. Looking forward to the comoing months and what they bring.