HQV (Test 2)

Test 2: Jaggies Pattern 1

From the HQV manual:

Interlaced video creates images with scan line artifacts. When video is deinterlaced 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 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.

The slowly rotating line will appear smooth or jagged, depending on its angle. As the line passes through a 45-degree angle and then approaches 0 degrees (horizontal), you may see a jagged edge appear. The point at which you first notice this jagged edge shows just how well the processor is working — the closer the bar gets to 0 degrees without any noticeable ‘jaggies’, the better the motion adaptive de-interlacing. Motion adaptive de-interlacers are supposed to treat still areas differently from moving areas. The still ‘logo’ portion of the image should be highly detailed and free of jaggies if the processor is truly motion adaptive.

ATI Radeon X1900 All-in-Wonder Video Card Review - Graphics Cards  1

ATI Radeon X1900 All-in-Wonder Video Card Review - Graphics Cards  2

ATI Screenshot; Score: 5

ATI Radeon X1900 All-in-Wonder Video Card Review - Graphics Cards  3

NVIDIA Screenshot; Score: 5

Both cards do an excellent job on this test, and even below the green line we don’t see so much “jaggies” as we do wavy lines.  However, those lines are just as annoying and incorrect as the stepped edges. 

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