mhafner explained Excessive DVNR a few years back with an example of disappearing sand patterns in HDDCS DVD.

I wonder about a similar video process "Edge Enhancement".
How do we identify Edge Enhancement, Excessive Edge Enhancement or Insufficient Edge Enhancement??

Occasionally/ often I notice a slim band of lighter color along face edges/ object edges, usually on one side of the object.
Is it due to Edge Enhancement or due to Excess or Lack of it??

Thanks.

See
http://www.videophile.info/Guide_EE/Page_01.htm

Edges need no enhancement at all. If the picture is too soft it has other reasons than
lack of EE. EE is simply a tool to fool the eyes into thinking it's sharp when it is not, and
it works only when you watch from a safe distance and are not used to see the artifacts it generates.
From close and when blown up enough any EE looks fake, ugly and very unfilmlike.
EE on the disc should not be mixed up with
- ringing and sharpening generated by DA, upsampling, downsampling, cables
- chroma delay problems
- chroma subsampling (and lack of colour definition visible around edges)
- MPEG artifacts (ringing,mosquito noise etc.)
When in doubt watch on computer monitor with 1:1 pixel mapping from screen shots.

I hope this isn't carried into HD. I hate EE.

EE is present on much HD. Because of the higher resolution it is mostly not a big problrm. Thick haloes like on DVD do rarely exist, and not in modern transfers.