Originally Posted by Bob Pariseau
Imagine that! That's certainly unexpected.
You may have discovered a bug in the Detail algorithm. I think it would still be a good idea to send an email to Anthem with what you discovered. Detail processing should be smoothly diminished near the real crop edges to avoid such "haloing" of the sharp crop edges themselves.
The other thing that still puzzles me is that raising the Edges value for SAT1 is resulting in a black border around the image instead of stretching what remains of the cropped image to the Video Output resolution limits.
Following is my question to Nick at Anthem and his response:
I discovered something today which seems a bit peculiar to me. Under Video Source Adjustment>Picture>Detail Enhancement, I tried adjusting the detail level to 5. What I discovered as I did this was a line formed around the perimeter of my picture which I will call a noise line, for lack of a better term. This line is white and is one pixel wide, but surrounds the picture on all 4 sides. At first, I tried to eliminate it by setting my edges off but this did not accomplish what I had hoped. I also tried edges on and setting it to 0 but as I expected, this didn't remove the line either. I also tried adjusting the edge setting above 0, but no change other than the line moving in to correspond with the edge setting. My scale out setting is set to Panoramic. I then went back to the detail adjustment and played around with the setting some more. The line disappears at a detail level of 2. Anything above 2 produces the line.
I have a Bell 9200HD fed into the HDMI2 of the AVM50. My TV is a Panasonic 58PZ700 plasma. Any idea what is happening here? This virtually eliminates me using the detail setting on the AVM unless I want to put up with having a very distracting white line framing the picture. The AVM is v 1.33.
That's what it's supposed to do. Like a sharpness control, it draws artificial borders around edges of objects in the image and like most videophiles, I say leave it off. The difference is that a sharpness control is analog (boosts high frequency, which occurs where there are transitions in brightness) whereas the detail enhancement control does this through digital processing, with the result being a little cleaner. It's still artificial.
This is image processing - the edge cropping function that re-frames the input has nothing to do with it.
Nick P., Technical Support