Jerry,

The test pattern is the first under

Video Tests->Evaluation

It looks like colour bars with the top having a 601 label (SD) and the bottom row having a 709 label (HD).

In order to view the test properly you must be able to ouput a single colour R, G or B - your scaler may allow you to do this - eg you first want to test blue is correct by only outputting blue light - once you confirm that blue is correct - switch to green only light output - with this happening you can clearly see which colourspace is being used as only one row, the 601 or the 709, will match the background - this is the colourspace which is being used...

On the Lumagen you can select which colour to output. On a CRT projector you would cap the tubes you want to block. Other projectors may allow you to do this. Or you could use the filter which comes with DVE but I note a comment in the manual which says it may not work for this test.

From the manual:

"Chapter 1: Verify Matrix

Function: Assist in determining the matrix used to decode the video for display and show the
difference between images encoded to both 601 and 709.

Pattern Layout: Split screen among color bar test patterns, followed by image material,
followed by another set of color bars. Each is split and labeled 601 or 709.

Descriptions of Use: This combination of test patterns and images was designed to illustrate the
difference between 601 and 709 encoding. Each system works within its own domain, but not
matching the type of decoder to the system used to encode the video will mess up the color
reproduction.

The color bars with gray reference have been split top to bottom. In evaluating the type of
decoder being used first observe the red green and blue channels individually. The top and
bottom half should not be equal in any of the colors. When one or the other color bar set is being

properly decoded the largest difference between the two will be seen in the green channel,
followed by red and finally the blue.
If neither is correct its time to determine if an adjustment to the decoder is needed. Before doing
that you need to determine what device is doing the decoding. If the connection to the display
device is via a DVI cable chances are what ever is ahead of the DVI cable is doing the decoding
and any adjustments will have to be done there.

The display device can complicate detecting what decoder is being used. As an example a
number of single chip DLP projectors convert an incoming RGB signal to the Y Cr Cb domain
for processing then take it back to the RGB domain. This processing could introduce its own set
of errors into the picture. This display would first have to be calibrated from a known quality
RGB video source.

Another important point is that if color matrix correction is used to get the right primary colors
the red, green and blue filters provided in DVE won`t work. The projector must have its own red
only, green only and blue only display capability.
Once it has been determined that the RGB display capability of the display is correct adjustments
can be made to the color control of the Y Cr Cb decoder so that one or the other decoding, 601 or
709, is correct in all three channels."

Mark

My Music : My Cinema