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 - Mixed 3:2 Film with Added Video Titles
Much like the earlier horizontal scroll tests, while NVIDIA produced a fairly clean image, you can see some artifacts in the ATI shot:
"Filmed content edited electronically for video can introduce additional problems for a video processor. 30 fps video elements, such as title crawls and scene transitions, may confuse the processor as it tries to detect and hold a 3:2 sequence, preserving the smooth motion of 24 fps film.While NVIDIA does well in this first test, there are noticeable interlacing artifacts in the ATI screengrab:
A worst-case scenario is when a movie is transferred to video for broadcast or distribution on DVD and an entirely new electronic end title sequence is created. The best video processors will be able to distinguish between film and video content, converting different parts of the image of a per-pixel basis.
Look closely at the various filmed scenes to see if image detail is preserved while electronic titles crawl across and up the screen. Are diagonal lines smooth, or jagged? Is the title crawl text smooth and crisp, or does it appear soft and degraded?"
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 (Horizontal Text Crawl) |
| 10 | THE TEXT IS CRISP, THE CRAWL IS SMOOTH, AND THE BACKGROUND IMAGE EXHIBITS EXCELLENT DETAIL WITHOUT SCAN LINE ARTIFACTS ("JAGGIES") |
| 5 | THE CRAWLING TEXT IS SMOOTH AND CRISP, BUT THE BACKGROUND IMAGES HAVE NOTICEABLE SCAN LINE ARTIFACTS |
| 0 | THE CRAWLING TEXT EXHIBITS NOTICEABLE TEARING OR COMBING |
Much like the earlier horizontal scroll tests, while NVIDIA produced a fairly clean image, you can see some artifacts in the ATI shot:
Hold mouse over image to see NVIDIA's Image Quality.
| Scoring | Description (Vertical Text Scroll) |
| 10 | THE CREDIT SEQUENCE TEXT MOVES SMOOTHLY UP THE SCREEN, THE TEXT IS SHARP AND CRISP, AND THE BACKGROUND IMAGE EXHIBITS EXCELLENT DETAIL WITHOUT SCAN LINE ARTIFACTS ("JAGGIES") |
| 5 | THE SCROLLING TEXT IS SMOOTH AND CRISP, BUT THE BACKGROUND IMAGES HAVE NOTICEABLE SCAN LINE ARTIFACTS |
| 0 | THE SCROLLING TEXT EXHIBITS NOTICEABLE TEARING OR COMBING |
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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.