Originally Posted by mark haflich
Obviously, all the chips do a much better job of 480i video deinterlacing than the Sil 504. The Sil 504 seems to fail all the 480i deinterlacing tests on the HQV test disc. Is the improvement edge-adaptive deinterlacing, better algs, greater and quicker number crunching or what?
It's been a long time since I ran the HQV tests on anything, especially a 504. It's not really one of my often-used test discs as many of the tests are for noise reduction, and the edge processing tests are a bit too artificial, short, or limiting. That disc is as much a marketing tool for SO as it is a true test disc, just as the ABT disc is for ABT.
Tests like the waving flag and rotating white bar(s) will not look good as they're designed to test edge-based processing, not motion-adaptive deinterlacing. The noise reduction tests are for, well, noise reduction.
The Super Speedway bleacher scene, miscellaneous cadence, and mixed 3:2 tests are really tests of cadence detection, not motion-adaptive processing. I believe there's really only one test which which might be intended (partially) for motion-adaptive deinterlacing - it's the one which actually looks like a test pattern
and has color bars, gray ramps, and some alternating black/white line patterns. And it's really only good for testing detection of no motion, as it's not a mixed motion/no-motion test pattern. (Some of the old Sage/Faroudja test disc clips are better for this.)
The Lumagen should do fine on this last test. What were your results for that pattern?
[Edit] The waving flag clip can also provide a test of basic motion-adaptive processing. The thing to look for is the detail in the bricks on the building - this should not be lost as there is very little motion in that area of the image. There should be no combing in the waving flag, but you'll need edge processing to reduce the jaggies caused by aliasing. One other thing to look for, and this is one that many observers overlook, is the stability of the stars in the flag. Older deinterlacers like Faroudja's DCDi can cause those stars to flicker or wobble a lot more than with some of the newer processors.
- Dale Adams