What is this video artifact?

[120inna55]

Can someone please tell me what this phenomenon is called? It varies in intensity station to station. I only notice it with bright colored graphics.

It makes the graphic appear to be shimmering squares (the squares are smaller that macroblocking & larger that pixels). It almost looks like the CUE bug, but its not horizontal lines.

I do not see it when viewing HD (either OTA or E* provided). And I can't see it on some SD stations even with bright/intense graphics.

I do see it on standard def (OTA digital/analog) no matter which STB I use: 942 via component or DVI & 721 via S-Video (obviously SD only). I also recall seeing it on my old 36" Toshiba analog CRT (but on a smaller scale).

Adjusting contrast, brightness, saturation, or resolution, makes no difference.

I expect there's no real way to fix it since I suspect it's the source material, but I wonder if anyone can give this artifact a name?

I have a Samsung DLP (check the profile for the complete setup)

Thanks.

 

[Purogamer]

A smaller pic might have helped...or a regular screen capture...sheesh...

If I knew what I was supposed to be looking for (along the top there? Down the left side? Which squares?) I and others could be more help...

 

[120inna55]

A smaller pic might have helped...or a regular screen capture...sheesh...

If I knew what I was supposed to be looking for (along the top there? Down the left side? Which squares?) I and others could be more help...

Can't do screencap.

I resized the pic. It's harder to tell on a smaller pic.

Look at the magenta, blue, and yellow horizontal bars underneath the days of the week. On a moving pic, the blocks "shimmer". This artifact is actually present on all of the graphics, but now that the pic is smaller, that's the only point of reference I can give you as the other areas are downplayed.

Thanks.

 

[Van]

I see it, its not normal what your seeing though. I would suspect the following culprits;

(1) The coax used in the system from the dish down to each receiver, if its older than 10 years, undershielded for the area, under rated for the task such as rg-59, damaged somewhere, ran along the 220 feed to your home, these all can cause issues with dropout like your seeing.

(2) Bad grounding of the system, this can cause interference as well,

(3) Improper connections on the coax though I dont see them cause pixeling often at all.

(4) Faulty electrical service in the home.

(5) Nearby transmission source.

 

[120inna55]

Thanks for the input.

Why wouldn't HD be affected? Why wouldn't all broadcasts be affected?

 

[DarrellP]

It's similar to "dot crawl", but that only affects composite on TV's with a terrible comb filter, obviously not your situation. Maybe it's in your video processor?

 

[Van]

I had a customer with a dish 500 setup to a 508 and 301, the 508 had been replaced 3 times for a very strange issue. On the local channels that are in the 8300 range 2 of them would have the colors colidiscope of rainbow colors, this also translated over to the menue system. I replaced every single part of this guys system making it totaly new and the problem still persisted. It is not a common issue, Ive never seen it again and havent heard of anyone that has. I spent an hour on the phone talking with someone in advanced tech support who was talking to someone higher up and they couldnt explain it initialy.

I know that certain radar detectors can disrupt the signal reception on a receiver, radio broadcast towers can also cause problems on the fss lnbfs and I have a non fss system that it is happening on as well. An appliance motor thats going bad can emit a frequency back through the electrical wiring that can effect sensitive systems such as computers and a/v gear. An overloaded circuit can also cause similiar problems so look for things like bulbs burning out more than normal.